Category Archives: Manufacturer

Choosing Hydraulic Valves – New and Replacement

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Hydraulic valves that are recognized by CETOP standards are interchangeable within most types of hydraulic equipment, making it easy to find a supplier that can provide valves suitable for use in your hydraulic equipment.

 

Valves in hydraulic equipment control and regulate the flow of hydraulic fluid through a system, but as there are different requirements for fluid flow in certain applications it is important that the right valve is used for each purpose.

 

Types of Hydraulic Valves Are Used For Each Right Purpose

 

Flow control valves can be configured to regulate the flow of fluid in two directions and are adjustable to allow for fine tuning of the flow rate. They control the movement of fluid in one direction, but in reverse the flow is free and cannot be regulated in the same was as it is when flowing forwards.

 

A pilot operated check valve is used to control the flow of hydraulic fluid to a cylinder, stopping it when needed to prevent unwanted movement of the cylinder.

 

A pressure relief valve is often used in conjunction with a pilot operated check valve or a solenoid valve to release the pressure contained by a pilot operated check valve, or to limit pressure in a control line leading to a solenoid valve.

 

Solenoid valves are often chosen over flow control valves for their ability to regulate the directional flow, instead of only being able to regulate in one direction. A flow control valve is suitable for applications where movement of a cylinder in one direction needs to be carefully regulated, but when it returns to the starting position no control is needed over the flow and speed of movement. They can be mounted in either direction, so it is up to the user which direction requires the control. For applications where control is needed over the flow rate in both directions (for example, in technologies that open and close gates or doors at a set speed) a solenoid valve is better as it allows for that fine control of movement and speed in both directions.

 

Replacement of Hydraulic Valves

 

In most cases a hydraulic valve will be replaced with one of the same type, and buying from YEOSHE ensures you will get a hydraulic valve that is ideal as a replacement even if your equipment is made by a different manufacturer. Sometimes a hydraulic valve needs to be replaced with one of a different type when machine specifications or usage changes, an example being a piece of machinery that used to use a flow control valve, but where there are operational advantages to having better control over the hydraulic flow in two directions.

 

Choosing the right type should be easy when replacing a hydraulic valve, as you can use the same type as before, but when designing a new piece of hydraulic machinery, the decision is a little harder. Understanding the basic function the machinery is required to perform is a must, but going a little further into the other functionality that may be required, or thinking about performance improvements that could be made with a different type of valve can inform a better design and result in hydraulic machinery that is more user friendly or that can fulfill more than the basic functions specified at the design stage.

 

If you need more information about hydraulic valves, please try to visit the website of YEOSHE Hydraulics Co., Ltd. The company can provide a variety of high quality industrial hydraulic valves for you to choose. Feel free to check out YEOSHE product pages and send inquiry to them.

 

 

Article Source: Hydraproducts Blog

How Does a Tube Straightener Work?

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In spite of great advances in manufacturing processes, still most of the tube and pipe production methods produce tubes that are neither round nor straight. In order to reduce ovality, and increase straightness, rotary straightening machines were developed.

 

The machines that are used for straightening are built with several methods of driving the rolls. While some machines have a discrete drive motor for every roll, majority of current machines use two drive motors – one for the top set of rolls and other one for the bottom set. Irrespective of the way in which the rolls are driven, it is essential that all the rolls revolve at equal speed from about 1 RPM to 2 RPM. Additionally, it is necessary for the manufacturer to build an electronic load sharing system to make sure the power required to straighten is shared equally between both the driving motors. A check of motor loading and roll RPM (Rotations per Minute) should be done, every time the rolls are changed. Further, this post will explain the working of a tube straightener.

 

Different Straightening Techniques:

 

Rotary tube straightening machines get their name from the tube that rotates while passing through the machine. The rolls hold and rotate the tube while feeding it through the machine. This is carried out until the entire or the desire length of the tube has been straightened. When the tube passes through the machine, it is exposed to two straightening forces, namely, bend (or offset) straightening, and pressure straightening.

 

  • Bend Straightening: One or more pairs of rolls can be adjusted to cause the tube to follow a curved path through the machine. Bending the tube in this manner is the main straightening action.

 

  • Pressure Straightening: Each pair of rolls can be adjusted so that the gap between them is slightly smaller than the outside diameter of the tube. As the tube passes through this limited gap, it is exposed to pressure. If this pressure is sufficient, then it causes the tube walls to be strained past their elastic limit, thereby causing some straightening of the tube. If the ability to squeeze the tube is used properly, it will help the tube to “round up”, thus removing some or all of its ovality.

 

You must carefully control the amount of bend, so that it has adequate force to take the tube past its elastic limit to achieve straightness.

 

Advantages of Additional Bending Moments:

 

Following are the advantages of additional bending moments:

 

  • With additional bending moments, the operator can apply a big bending moment at the first pair of deflecting rolls and lessen the linear moment. In this case, the final pair of rolls provides a finishing action.
  • Large number of plastic cyclic deflections helps to straighten the badly bent tubes.
  • They deliver more optimal straightening of the leading as well as the trailing end of the tube.
  • Materials such as copper tube can be so efficiently straightened that no traces of residues are left behind. Subsequent annealing does not change the tube’s straightness.
  • Last, but most importantly, they achieve lower straightness and ovality tolerances despite any increase in work hardening.

 

And then, let us understand how tube straightener is used.

 

How to Straighten a Tube By Using Tube Straightener?

 

Follow these simple steps to straighten a tube:

 

  • Step 1: Bend the end of the coiled tube
  • Step 2: Insert the tube into either side of the tool
  • Step 3: With the help of the adjustment knob on the top, bring the rollers into position, and feed the tube through
  • Step 4: After enough tube has cleared all the wheels, start pulling the tube through with constant pressure
  • Step 5: With the help of the adjustment knob, you can fine tune the alignment for the tube
  • Step 6: Pull the required length of the tube through the tool

 

All you have to do is, push the piece through the wheels and work it back and forth. You can fine tune the adjustment knob till all the bends have been straightened.

 

Learn more information about tube straightener, I recommend that you can visit the website of Maxclaw. The company is the professional manufacturer of tube tools. You can find tube cutters, tube benders, deburring tools, double flaring tools, and much more products on their site. Please feel free to check out Maxclaw website and feel free to send inquiry to let them know your requirements.

 

 

Article Source: https://www.woodwardfab.com/blog/how-does-a-tube-straightener-work-tube-straightening-techniques/

Help, I’m a Beginning Archer and I Don’t Know What to Buy!

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Whether you’re just getting started in archery or you’re getting back into the sport after being away from it a while, it can be confusing to know what equipment you should and should not get right away. There’s a ton of fancy and not-so-fancy stuff out there, but some of it is not really needed until you build up your skill level a bit.

 

We hope this article will help you understand what things you absolutely have to have to get started, what archery accessories is a good idea but you can do without at first, and which items you might start planning to pick up along the way.

 

Items You MUST Buy to Get Started

These are things you simply cannot do without, because they’re essential to the sport of archery, whether you’re just kicking around in the backyard or getting ready to take your archery out onto the competition range or the hunting lands.

 

a) The Bow

You will need a bow, of course. You can’t practice archery without a bow, and you should make sure you buy the best recurve bow that fits your budget.

 

b) The Bow Stringer

A bow stringer is essential to any recurve archer’s kit, because it is the only way to safely and consistently string a bow. The bow stringer helps you safely use your body weight to bend the recurve bow enough to slip the string over the limb tips. Your grandfather might have used a “step-through” method to do this, but that is dangerous for both you and your bow, so make sure you always use a bow stringer to put the string on your recurve bow.

 

c) Arrows

Arrows, along with field tips, are the next required item, and you should purchase more than one. Most sporting goods stores will sell you a 6-pack or more of arrows. It’s often a good idea to buy arrows at the same time that you’re buying your recurve, since the bow technician who helps you pick out a good recurve will be able to measure your draw length and help you buy the right size arrows. If this simply doesn’t work out for you, though, we have a handy guide on choosing arrows.

 

d) Nocking Points

The purpose of a nock point is to provide you with a constant place on your bow string to nock your arrow. This is important because it will provide consistency of shooting so your arrow has a better chance of going where you want it to go every time to shoot your bow. It also helps make sure you don’t nick your bow hand with the arrow’s fletching or vanes. You can make a nock point from brass points, from serving string, or from tape. The bow technician who helps you set up your bow or any experienced archer can help you with setting your nock point where you need it.

 

e) Targets

Once you have all your essential gear together, it’s time to go cast some arrows. But wait, what are you going to aim for? Targets are essential, and can be as simple or as fancy as you’d like. Some days, I’ll just draw a picture of a cottontail rabbit on a piece of paper and shoot at that, while other days I’m looking for more refined knowledge about where my arrows are landing and will use a circular bulls-eye target. In addition to the target, though, you need some sort of a backstop to stop your arrows from going straight through the target and out into somebody’s fence or arm. Archery shops and sporting goods stores sell foam blocks that serve nicely, but you can also use a few bales of hay.

 

Recommended, but Not Required Items

This list will let you know some items that are nice to have, but you do not absolutely have to invest in them right away. Most of these items are comfort-related, though, so you may consider purchasing or making the first two items no matter what just to make sure you can get the most enjoyment possible out of the sport.

 

a) Arm Guard

An arm guard covers your forearm, and sometimes your entire arm, to keep your sleeves, hair and skin out of the way of the bowstring as you release your arrow. As you start learning the proper technique, you should learn how to adjust your elbow vertically to keep most of your arm out of the way of the string, but until then, you should wear an arm guard that covers as much of your arm as possible. The string will smack or drag along your arm from time to time, especially as you’re learning the sport, and you don’t want your skin to be in the way when that happens.

 

b) Glove or Finger Tabs

If you shoot a bow without something to protect your fingers, you will end up with painful blisters that will eventually lead to problems with your release. You can wear a leather glove or finger tabs on your shooting hand to prevent these blisters. Modern finger tabs sometimes also include spacers that spread the index and middle fingers apart, helping to keep the archer from pinching the arrow.

 

The good news is that you do not have to buy this item. You can make your own finger tabs—Scout troops quite often make their own finger tabs, and the patterns or kits are readily available.

 

c) Arrow Rest

If your bow doesn’t include an arrow rest, this is something you may want to invest in early on. The arrow rest is what the arrow sets on as it is drawn, and can be a simple fixed rest or a complicated drop-away rest that falls out of the way as the arrow is released. For short-term use, some archers can use their hands as a makeshift arrow rest, but an actual rest is something you’ll want to install on your bow after you get it broken in and know you’re going to continue practicing archery. We will be adding an article soon to help you select the right arrow rest for your need, so stay tuned!

 

d) Broadhead Wrench

A broadhead wrench allows you to unscrew a broadhead tip from your arrow without slicing your fingers open. If you are only using field tips for your archery, this might be something you can wait on until you’re doing some sort of archery that requires broadheads.

 

e) Bow String Wax

If you look at your bowstring through a magnifying glass, you’ll see millions of fibers that make up just one strand of your string. If not properly lubricated, those fibers rub together and create friction that can lead to the strands snapping, thus shortening the life of your string. To help prevent that from happening, archers was their bow strings with bow string wax, which provides good lubrication while also providing a layer of protection against water and other elements you might encounter in the outdoors. Buy quality bowstring wax, wax your bowstring every 2 to 4 weeks, and your bowstring will last much longer.

 

Optional Items

The rest of these items are handy, but they are not necessary to have. They’ll make your archery a bit more fun, though, so these are definitely things to put on your wish list for later on down the road, when you know that archery is something you’re going to stick with.

 

 a) Sight

A sight is used to help you aim your bow. Most recurve bows don’t include sights; because many recurve bow archers prefer the challenge of instinctive shooting, or shooting without the aid of an aiming aid like a sight or another point of reference. Still, sights are perfectly legitimate to use, and can sometimes help the beginning archer learn where to look and how to aim for instinctive shooting.

 

 b) Quiver

A quiver is a container used for holding your arrows before you shoot them. Sometimes, archers will just stick their arrows into the ground, but this can be tough on the arrows and arrow tips and inconvenient for the archer. Some quivers attach to the bow while some are worn around the waist or shoulder. Quivers make it much quicker to pull a new arrow for the next shot. It’s not an essential bit of equipment, but it’s definitely nice to have.

 

 c) String Whisker Silencers

Whisker silencers are lightweight rubber silencers that reduce the noise of your bowstring without compromising the performance of your bow. These are not so important for backyard or target archery, but they are wonderful add-ons to your bowstring when you start bow hunting.

 

Summary

This list of items should get you started, as well as give you a wish list of items to buy as you build your skill as an archer and branch out to other forms of archery. If you have any questions about any of these items, or product recommendations, just let Man Kung Company know and they will help you out.

 

Established in 1988, the Man Kung Crossbow Manufacturer is dedicated to the design and manufacture of a wide range of crossbows, archery bows and related products. Since the company was established, they have always been dedicated to the research and development of new products to meet current market demands. Man Kung’s outstanding quality has won us a high reputation from both domestic and international customers.

 

More details, try to click here: https://www.archery-manufacturer.com/

 

 

Article Source: Recurve Bow Guide

The Best Impact Wrench Buying Guide

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An impact wrench is a must-have in the garage, but now it’s a must at home and inside the trunk of your car, so we offer for your convenience our very own 8-Step Impact Wrench Buying Guide.

 

A cordless impact wrench is both highly effective and efficient in removing and tightening bolts or screws that feel stuck in place. Having one is necessary in ensuring work is done both safely and swiftly.

 

Injury, however, could occur while using manual tools, the wrong tools, or simply old tools. Mishandling the tools or applications themselves can and do cause complications for the user, not the least of which are injuries, damage to property and machinery, and time that cannot be regained.

 

Acquiring and sticking to automatic and powerful tools like impact wrenches has become no less than necessary for both the professional and amateur alike. In order to help you better determine how best to make your cordless impact wrench purchase, below are some important tips for you to consider before blowing your money on a piece of hardware you will surely come to need around often—and thank your lucky stars for purchasing.

 

  1. High Torque

Simply put, this “power” is the bread and butter of any impact wrench, cordless, corded, or otherwise. Torque is defined by Hyper Physics as “the influence which tends to change the rotational movement of an object.” As it relates to the impact drill, the higher the amount of torque the tool has, the stronger the influence it will exert over the bolt or nut you have it working on.

 

Torque is typically in counted the hundreds. Make absolutely sure that it is not too low, which would only be good enough for intermediate purposes at best. No less than 200 or above is a good number to work with. Anything below is unacceptable! Remember what you want and will use this tool for—this is surely an area where you cannot skimp.

 

Life’s fast pace and development of technology can and does often require higher numbers, but these are not hard to stay abreast of because of the internet. You can easily stay updated by searching for this online – also, keep in mind that alternatives are always easy to find if you eventually think your main wrench falls below the standards that you need.

 

  1. High Rotations Per Minute (RPM)

When selecting an impact wrench that has impressive RPM’s, you will discover that 3,000 or above is an ideal number for basically any impact wrench. The impact tool relies on rotations to tighten or unwind a screw or nut in its place. More rotations translate to, of course, less effort on the part of the operator, as the cordless impact takes on the extra work speed itself.

 

Lower RPM can delay project completion so select a power tool that prioritizes RPM very much, even if the torque or Impacts Per Minute (IPM) may fall a bit below standard. The only exception to this, of course, is if you are simply not as concerned about finishing a task or project quickly.

 

Still, the faster the output shaft spins, the quicker your work can be done. While shopping in your favorite store or online retailer, remember to check the RPM ratings on the product before clicking the buy or reserve button in order to know just how fast your soon-to-be new impact wrench operates.

 

  1. High IPM

IPM (Impacts Per Minute), like RPM, should be suitably high enough because this power tool requires a LOT of contact to push down a screw or bolt and tighten or lose it. If it is not possible on your budget to have a high IPM impact tool, look for a device that balances the torque, RPM and IPM well.

 

The last (IPM) can fall off a bit if the first two (RPM and Torque) are great. Having more IPM means there is more contact between the tool and the intended target, and more contact means the targeted screw or lug nut stays firmly in position. It’s easy to see why this part of the tool is highly important, as well.

 

Couple this with a high torque and RPM and you have the makings of a nearly perfect impact wrench.

 

The next question would naturally be what source of power will your impact wrench use and how much are you willing to spend on it?

 

  1. Great Brand

Like most products out there, an excellent company or manufacturer will get you a lot when it comes to quality of the wrench you ultimately decide to buy and put to use.

 

Veteran brands, due to their established success, have all the privileges and experience to experiment on various designs and updates. Make sure you look into the catalogs of various companies first, in order to have a clear idea on what to buy for your garage or car.

 

New brands do come along here and there, of course, but with a still developing and improving technology like cordless impact wrenches, for example, it would be wiser to trust a brand that has been around for a long time. A tried and tested company would do you a lot of good when it comes to scanning for a potential impact wrench. Look up these trusted, veteran companies first and then check out what impact tool options they offer.

 

  1. Lightweight

Impact wrenches should be light enough for extended use and ease in carrying. If you haven’t picked up an impact or have only used a small variety of corded impacts, then you may actually find yourself surprised (and potentially dismayed) when your new battery-laden impact beast is plopped down at your front door and you lift the box. The good news is that there are many lighter-weight contenders out there that can fit both your application and comfort level simultaneously.

 

Lighter is always better if you are using the tool to screw in nuts and bolts with force. A lightweight tool is much better because it gives more mobility for the user and makes operating the power tool easier. This is especially true for those times when the impact is needed for a difficult project or for longer periods of time.

 

Lightweight wrenches must be prioritized since they make overall use easier and less strain on the wrist while operating on heavy work. Lighter is definitely better for a tool that will used for long periods of time.

 

It’s worth noting here that too many people have permanently damaged their wrists and hands and for no good reason, apart from making a few dollars. This is sad considering how many tools there are available to keep this very thing from happening. A lightweight tool is an excellent way to insure our bodies stay healthy and injury-free.

 

  1. Type of Impact Wrench

Depending on who you are, what you need, want, or think you need or want can vary. Not long ago, the only viable options for impact wrenches were electrical, corded versions, and the more popular compressed air versions. Due to the amazing work done by today’s leading tool manufacturers however, that has changed dramatically and now we have the wonderful option of the portable cordless impact wrench as well.

 

There are other options for the heavy-duty, industrial market of course, but they are outside the scope of this article so we won’t be covering them here.

 

  • Wired Electrical Impact Wrenches

These are 100% dependent upon having—and reaching—an AC outlet, therefore they are not given to situations that would require portability in or to remote locations. However, in certain situations and for certain people, they can keep the costs low and do what needs to be done.

 

They are typically ideal for those who do not need an impact quite as often, or perhaps those who are more like hobbyists, tinkerers, or light-duty, occasional home mechanics. In most cases, they are not as strong in the torque department as the compressed air wrenches, but they do provide enough power for the sporadic user.

 

Another added benefit of the electrical impact is that it doesn’t require the power source to be localized (on the tool itself) and therefore this makes the wrench a bit handier in tight spots.

 

  • Compressed Air Impact Wrenches

These impacts have been around since the dawn of time—or so it seems—and for good reasons.

 

Air tools have some excellent benefits and offer a wide variety of applications, provided one has a source of air provided nearby. While it may not be convenient for most people to lug around a small air tank in the trunk, it is still quite possible to keep one handy in the case of other needs as well, such as airing up a flattened tire on the roadside or perhaps an air mattress at the campsite.

 

The main benefits of the air impact are weight, power, and variety. This version of the impact needs relatively little local parts or mechanisms; therefore the design lends itself to many sizes and applications. “Inline air impact wrench” and “Pistol” impact designs vary, with the former appearing more like a screwdriver-style grip, while the latter should obviously conjure up images of the Wild West.

 

Similar to the electrical impact wrench, the compressed air version draws its power from elsewhere, allowing the tool’s design to focus only on performance and take up less room. This is especially true for the inline versions, which can be quite small—a great design for particular needs.

 

While the compressed air impact wrenches are more portable than their electrical brothers, they still fall short of the mark offered by the latest and increasingly popular member of the family.

 

  • Battery-Powered Cordless Impact Wrenches

In their early years, the battery-powered impact struggled in more than one category. The torque wasn’t yet there, the battery use time seemed shorter than the charge time (not to mention the battery life of the NiCads—shiver), and the prices were great for spitting out whatever you were drinking at the time of observation.

 

However, as they say, “Times they are a’ changin,” and the cordless impact wrench is one of the most useful, practical, valuable, and affordable innovations we have on the earth today.

 

Torque is no longer a problem as these tools come in an array of options for virtually any application, including the everyday, professional mechanic. Using our impact wrench buying guide’s sections above on features, you can choose which specifications are right for you. The same rings true for IPM, so the only remaining issues to consider are size, portability, and weight.

 

In way of size, one might think or suggest that this is where the cordless falls short of the electrical and air impacts, but this isn’t always the case. Years of innovations and advancements in both design and power source cause these cordless tools to be much more similar in size to their predecessors than before. Again, depending on application, we can choose the best impact wrench to suit our needs. Because of today’s technological advancements, we now have cordless impact wrenches that are strong, lighter, and easy to use. The added benefit is that today’s cordless tools are utilizing the Li-Ion (Lithium-Ion) batteries, which offer a compact size with power, use life, and longer lifespan.

 

Now that the cordless impact has gained so much ground on the traditional impacts in these other areas, it has become an essential part of our tool kits and even trunks, primarily due to the fact that they are the kings of portability. Toss it in the truck or car and go—no need to worry yourself or injure your body with large, unruly tools anymore. This is the main asset of the cordless tool: take it anywhere and do what you need to do.

 

  1. Safety Features

So, now you know that it is great to have an impact wrench that has high RPMs and IPMs for the best performance.

 

But in the midst of your starry-eyed shopping, don’t forget to select an impact wrench that is stocked up on the most important features of all: safety. An impact wrench is, after all, a power tool, therefore proper attention must be placed in not only knowing how to use it and what it does, but also what it is capable of.

 

A couple of important safety features include anti-overloading, cooling, etc. The best features on tools are designed for the explicit reason to keep us from sustaining injuries—these included safety mechanisms can save your life and improve the overall life of the tool.

 

Professional or not, these features are important because your safety should always be at the top of the list. The best in every field know that once you get this right, the other features can follow.

 

  1. Enjoy Your New Impact Wrench!

Now that you’ve got your grip with this handy impact wrench buying guide, we wish you the best of luck and congratulate you on your upcoming purchase! We have no doubt that you’ll enjoy your new impact power tool for years to come.

 

Get more impact wrench series information that you can try to check out KSPARK website. This company is specializing in kinds of air tools. Their products include air sander, air spray gun, airless pump, heavy duty impact wrench, air wrench, agitator mixer, and much more. More details, welcome to visit Kspark and feel free to send inquiry to them.

 

Article Source: https://wrenchguru.com/impact-wrench-buying-guide/

Plastic Extrusion: Advantages and Disadvantages of Plastic Extrusion

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Plastic Extrusion

Plastic extrusion is the process where plastic materials are converted from solid to liquid and then it is reconstituted into finished products. In other words, plastic is melted down and then reshaped into useful items. There are some advantages to plastic extrusion, but there are also a few disadvantages that must be considered.

 

Advantages of Plastic Extrusion

3 of the major advantages of plastic extrusion are as follows.

 

  • Low Cost: Compared to other molding processes, plastic extrusion molding has a low cost and is more efficient. The extrusion molding process uses thermoplastics and they undergo repeatedly melting and hardening, this allows the waste to be reused rather than be discarded. Raw material and disposal costs are lowered. Plastic extrusion machines operate continually and this reduces the chances of inventory shortage. It also allows for 24-hour manufacturing.

 

  • Better Flexibility: Extrusion molding will provide considerable flexibility in the products being manufactured with a consistent cross section. As long as the cross section stays the same, the extrusion molding can produce complex shapes. Minor alteration to the plastic extrusion process the manufacturers can use it for plastic sheets or produce products that mix plastic attributes.

 

  • After Extrusion Alterations: Plastics remain hot when they are removed from the extruder and this allows for post-extrusion manipulations. Many manufacturers will take advantages of this and use a variety of roller, shoes and dies to change the shape of the plastic as needed.

 

Disadvantages of Plastic Extrusion

Plastic extrusion has also some disadvantages.

 

  • Expansion: Once the hot plastic is removed from the extruder it will many times expand. This is called die swell. It is problematic to try and predict the exact degree of expansion. Because it is hard to predict the exact expansion, manufacturers often accept significant levels of deviation from the dimensions of the product.

 

  • Product Limitations: Extrusion plastic molding does place limits of the types of products that can be manufactured. There are alternatives that require an investment in a different type of extrusion equipment.

 

If you have any interest in plastic extrusion machinery, I recommend that you can visit the website of Leader Extrusion Machinery Company Ltd. They have more than 20 years’ experience designing and manufacturing plastic extrusion machinery. And the company specialty is manufacture of PP, PS, PVC, PC sheet extrusion lines; and PP, PC PET hollow profile sheet extrusion lines.

 

Learn more information about plastic extrusion machines, welcome to send inquiry to Leader Extrusion Machinery Company.

 

 

Article Source: http://civilengineersforum.com/plastic-extrusion-advantages-disadvantages/

The Best Casting Process for Your Needs

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In the field of metal work, various methods of casting are used to turn molten metals into specific shapes for use in commercial and industrial products. Within each casting process, a cavity is formed in which molten metal is poured either with gravity or high pressure. After a number of seconds have passed, the metal solidifies and the newly hardened casting is released from the mold or form.

 

Casting is most often employed to make intricate metal objects that would otherwise be complicated and much costlier to produce with different methods.

 

The process of casting has existed since ancient times. Some of the earliest examples of metal casting exist today in the form of jewelry, tools and sculptures that have been retrieved from archeological sites and put on display in museums around the world. Early methods of casting included plaster mold casting and lost wax casting.

 

Today, the methods of casting fall into the non-expendable and expendable categories. Other variants of the two categories include the methods used to fill cavities — including pressure and gravity — and the material used to form a particular mold.

 

First, there’s the non-expendable type of casting, which would account for any method in which the mold can be used again. Examples of non-expendable casting include permanent mold and die casting methods, in which the molding cavities are made of metal. Non-expendable casting is often favored for its ability to produce uniform parts at high volumes.

 

Expendable casting accounts for any method in which the mold is discarded after a single use. Examples in this category include sand and plaster casting, in which molten metal is poured into a cavity that is then broken away to reveal a finished casting. A further example of expendable casting is investment casting, a modern version of lost wax casting, in which molds are formed around wax patterns, which are then melted away to reveal hard ceramic cavities for subsequent metal molding.

 

Aluminum Die Casting

With aluminum die casting, a process takes place where molten metal is forced into a cavity in which a mold is formed. The process is achieved with a pair of steel dies that have been machined into particular shapes, which form the molding cavity when joined together. A similar process can also be applied with castings made of copper, magnesium and other metals.

 

The aluminum die casting process is divided into four stages: preparation, fill, ejection and trim off the gate.

 

First, a lubricant or die release agent is applied to each half of the cavity in preparation for the injection of the metal to be cast. Next, the dies are brought together and the cavity — in some cases one, in some cases two or more — is filled with molten metal under high pressure, which is maintained until the casting hardens.

 

A waiting period follows, after which the metal will have hardened into its final shape. With that step completed, the dies are separated and the castings are pushed out of the mold with ejector pins. Afterward, the parts that comprise the scrap — runners, sprues, overflows etc. — are trimmed away. In some cases, the finished shape will then receive sanding or polishing along the surfaces.

 

The high pressure at which the cavity is filled is crucial to the process because this prevents any part of the casting from hardening prematurely. This also ensures that the entire cavity is filled with no discontinuity, which could otherwise occur in die castings with complex shape formations. High pressure also eliminates the possibility of air bubbles, while the entrapment of air is further avoided with vents along the dies surfaces.

 

Aluminum die castings can also be produced with secondary features on molds, such as holes and grooves. Aluminum die casting is used to create everything from marine and sporting components to oil pumps, engine cradles, transmission transfer cases, heatsinks, enclosures, and brake components. The process is generally reserved for high-volume industrial productions.

 

Sand Casting

In the process known as sand casting, hardened casts of sand are used within a gating system to mold metals and other materials into shape. The sand is formed around patterns, which form cavities within the sand that are subsequently filled with molten metal. Due to sand’s heat-resistant quality, sand casting accounts for the vast majority of metal mold production.

 

To make the sand castings, sand is mixed with clay, water and sometimes other substances. The process here is a lot different than die casting because the hard sand that forms the mold is broken away and dispensed with afterward. Nonetheless, sand castings are often used to produce complex molds that are harder to make with die castings.

 

The process of sand casting is divided into several steps. First, a pattern is placed into the sand, where a cavity is then formed within the sand through the application of gating, after which the pattern is removed. In some cases, the cavity will be rather complex, with multiple grooves and several turns, twists and corridors.

 

Next, the cavity within the sand is filled at high pressure with molten metal. Once the metal has cooled into a hardened shape, the sand cast is broken away and the mold is removed. The finished mold might then be modified in whichever way is necessary, whether it needs to be trimmed or buffered to a smooth shine.

 

Sand casting molds are commonly used to make complex metal objects, such as one-piece equipment parts with various contours that would be hard to produce through other casting methods. Examples include the trap pipes used in household plumbing systems and metal doorknobs and lampshades.

 

Sand casting is also used for artistic items such as living room fixtures and metal sculptures. Sand casts are even used in jewelry production for items such as rings and metal bracelets. Whether the finished product is complex or simple, sand casting is a reliable method that allows manufacturers to form exact shapes with the utmost precision and detail.

 

V-Casting

An alternate form of sand casting is known as vacuum molding, or V-casting, which involves the use of unbonded sand. V-casting is often employed in the production of ferrous and non-ferrous metal molds.

 

The process makes it possible to form molds without the use of pressurized compaction methods, such as squeezing and blowing. Instead, clean molds are achieved with dry sand and vacuum pressure. V-casting allows manufacturers to do away with sand mixers and other equipment required for hardened sand.

 

V-casting can be carried out with a simple arsenal that consists of a vacuum system, a pattern, a film heater, a flask and a vibration surface. The process is generally clean and free of fumes or odors. Once finished, the dry sand is simply recycled for the next application. As such, V-casting is one of the most waste-free methods by which molds are cast for metal products.

 

In V-casting, patterns are placed onto boards with vacuum chamber vents. Heat-softened sheets of plastic are then placed over the pattern and the vacuums are activated. This causes the plastic to wrap tightly to the details of the pattern. Once hardened, the pattern is removed from the mold. Then, a vacuum process is utilized to pull molten aluminum through the cavities.

 

V-casting is often favored due to its ability to produce fine finishes with precise dimensions. A multitude of shapes can be achieved with the method, whether the mold is lightweight or heavy. The process allows you to reuse patterns multiple times and leaves little scrap excess material upon completion.

 

Investment Casting

Investment casting is a modern-day method of lost wax casting, which has been used for thousands of years in the creation of art fixtures, figures and masks. Archeological finds throughout Eurasia have included plates, vases and furnishings made with earlier forms of the wax casting method.

 

Investment casting is favored in a variety of industrial productions because of its versatility and accuracy of detail. Numerous mechanical pieces, such as valves and turbines, are made from the process of investment casting.

 

First, a master pattern is made from wax, or sometimes from wax replicas of a preexisting non-wax pattern. Next, a mold is created, which is also referred to as the “master die.” Several different wax patterns can be combined into a bigger pattern for a single molding. For industrial applications, the wax patterns are applied to a sprue that connects to a mechanical arm.

 

Next, the wax molds are dipped in ceramic with factory machinery. Then, the mold is heated and the wax melts out from the surrounding ceramic mold. With the ceramic molds now empty, molten metals are poured into the cavities formed by the ceramic.

 

Once the metal inside the ceramic molds have hardened, the ceramic forms are broken away. Afterward, excess parts are removed from the metal shapes, which are then readied for their ultimate use.

 

Where to Find Die Casting Manufacturer?

Champion H&C Inc. is a professional manufacturer of specializing in kinds of die casting processes and CNC machined products. Such as aluminum die casting parts, zinc alloy die casting parts, CNC lathe machining parts, CNC turning parts, and much more products that you all can find on Champion H&C website. If you need more information about die casting process, please do not hesitate to send inquiry to contact with Champion H&C Inc. immediately.

 

 

Article Source: https://diecasting.com/blog/2017/07/31/best-casting-process-for-your-needs/

The Stages and Machines Involved in Producing EPS Foam Blocks

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Expanded Polystyrene foam, also known as EPS is a highly durable material that is used in a wide variety of consumer products. It can be found nearly everywhere, in your local food store (plates, cups, food containers etc.) and the local electronics stores (insulation for refrigerators, coolers etc.), plastic utensils are made of Styrene, CD cases and cloth hangers are all made of Styrene. It is also an excellent insulation material.

 

EPS foam starts at very small beads, also known as granules, similar to sand in texture.

 

In order to make an EPS foam block out of these raw small beads, they need to be “blown” into larger beads, about 50 times its original size. This is called the pre-expansion process. Depending on the density required, the beads are blown using steam in a machine called expander or steamer. The expander can be a simple manual machine that a worker places the raw material in, then turns on the steam. Or, it can be an automatic machine where the material is blown stems automatically. At this stage, the beads – up to 50 times their original size – are called pellets and are ready to be molded.

 

Continuous pre-expanders are operated without pressure and are equipped with an open- top agitator tank in which raw material is continuously fed from the bottom by an adjustable screw conveyor. Steam is also fed continuously into the pre-expanding room through openings that are positioned shortly above the tank.

 

No matter which pre-expander is used, they all trickle the expanded beads into a so-called fluid bed dryer, where they are dried and stabilized before they are transported into the storage silos.

 

The next step is to mold the expanded beads. There are 2 options for molding. One is using an EPS shape moulding machine, which molds the foam into precise shape and size required. The other is using an EPS block molding machine which will result in creating foam blocks or sheets, 3′ x 2′ x 8′ up to 5′ x 5′ x 24′. The EPS expanded beads are poured into the molding machine for a second heating with steams. This will result in the foam beads being swelled and pressed against each other, until they become one solid piece of foam

 

The two most common blowing agents used are pentane and carbon dioxide. This process called polymerization fills the polystyrene with millions of air pockets, which helps it to expand and also gives it a low thermal conductivity. During expansion, the product can be molded into a variety of shapes and sizes. The final product is 90% air, but amazingly, EPS can have a compressed strength up to 40 psi.

 

In the last step, the EPS foam is removed from the molding machine and cooled down. If you used the shape molder and created a smaller EPS shape, then the cooling time will be shorter than when creating a whole foam block. The larger the foam – the longer it takes for it to cool. The molded EPS should be kept at room temperature (about 70F)

 

Tai Shyan Machinery Industrial Co., Ltd. was established in 1978. They specialized in whole machinery equipment and designs for EPS, EPP fully automatic molding machinery and essential accessories for machines. As a professional EPS / EPP automation solution provider, Tai Shyan is just there for you.

 

 

Article Source: http://EzineArticles.com/8170518

Application of Cold Roll Forming Machine

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Do You Know What A Cold Roll Forming Machine Is?

Cold Roll Forming Machine is a kind of machinery which uses the cold roll forming technology to roll forming the sheet, strip and sheet metal and so on. It makes the metal panel to form a special section bar, so the use of roll forming machine is very wide.

 

Cold-formed steel products which is produced by cold roll forming machine, is a kind of structural member is more important. It is widely used in construction, automotive, electronics and shipbuilding, machinery and other industries. In some areas, it is so popular as it can replace steel, play the effect of saving energy and resources, it is developing more and more rapidly, technology is being improved.

 

The cold roll forming machine have many types, like the gutter roll forming machine, door frame roll forming machine, downspout roll forming machine, garage door roll forming machine, solar photovoltaic support roll forming machine, heavy truck fender roll forming machine, rack column roll forming machine, cable bridge roll forming machine, carriage board roll forming machine, and so on.

 

Well, Where to Find The Reliable Cold Roll Forming Machine Manufacturer?

 

I think Yunsing Industrial that would be your best choice! Yunsing has accumulated more than 40 years of experience specializing in manufacturing steel plate automatic cold roll forming machines with advanced technologies and superior quality products, such as roofing and wall cladding, corrugated sheets, stepped tile roofing, floor decking, C-Purlin, rolling shutters and door frames.

 

If you need more information about cold roll forming machine series, please do not hesitate to visit Yunsing. They will supply you the best quality roll forming machines and services.

 

 

Article Source: https://www.linkedin.com/pulse/application-cold-roll-forming-machine-lolita-wang

Casters for Specific Applications: How and When To Choose Office Chair Caster Wheels

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The good news is that you can find casters for office chairs, desks and even workstations to keep things rolling easily.

 

Your employees would love to use chairs and desks that are mobile for the right reasons. If you select the right caster, your office chairs can roll and move around easily and more importantly, quietly without the need of ugly plastic mats.

 

It is also seen that choosing the right office casters can improve workplace ergonomics. This means you can select the right casters and indirectly keep your staff healthy and happy.

 

How Can Technically Advance Office Chair Caster Wheels Positively Affect Your Workplace?

 

Modern office furniture caster wheels can roll and swivel even on carpeted floors. The innovative bearing and wheel design makes it easy for chairs, desks and other office equipment to move over carpeted areas or on floors with rugs with ease.

 

This easy movement makes work more comfortable for employees who have to sit in chairs for extended periods. What’s more interesting to note here is that ease of movement translates into increased productivity and efficiency. Not to forget, you can reduce workplace overexertion.

 

Yes, Office Casters Can Be Quiet!

 

Perhaps the last things you would want in your office are noisy wheels and unwanted squeaky sounds of rolling office chairs and equipment. You can now find ‘practically’ silent office chair casters that can maintain the mobility of your office furniture and equipment without adding to the noise. Remember, ‘silent’ office casters can help your employees stay focused on the task and help them become more productive.

 

No Need for Ugly Carpets

 

With innovative materials used in office chair casters, there will no longer be need for unattractive plastic mats or carpets in the office. “Non marking” casters do not mark or strain the tiles and at the same time, extend the life of your carpet or rug.

 

Because office casters can now be easily replaced, investing in high quality office casters make more financial sense than ever. After all, you no longer have to add the inconvenience of buying new office chairs to your budget.

 

How to Replace Your Office Chair Casters

 

Well, buying new chairs just because your office chair wheel breaks is history now. Chair casters can be easily replaced and replacement casters are affordable as well.

 

Before you proceed with the replacement, make sure:

 

  • The replacement caster wheels you choose match the stem and wheel of your existing caster.
  • Caster wheel you choose for replacement should show best performance on your office floor.

 

Remember that chair casters are differentiated by their diameter. Larger wheels can make your chair sit higher. On the other hand, caster with smaller wheels can lower your chair.

 

Hard wheel casters are designed for use on carpeted floors. Soft wheel casters can be used on hard floors (wooden and tile surfaces).

 

Where Can You Find Quality Caster Wheel Replacement?

 

About this question, I can recommend a manufacturer to you – that’s ENJOYING GO Co., Ltd.

 

ENJOY is a professional caster wheel manufacturer in Taiwan. They offer kinds of caster wheels for office chairs and home furniture. If you need more information about caster wheels, try to visit ENJOY and get more selections of PU caster series.

 

 

Article Source: http://casterwheelguide.com/selecting-caster-wheels/

Precision Metal Stamping – How to Find a Qualified Supplier

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When selecting a supplier for stamped metal components with tight tolerances and critical features, there are some important factors that you should consider. Although important, unit cost should not be the sole deciding factor as explained below. Making a purchasing decision only based on quoted cost may result in overall dissatisfaction with a supplier’s performance, or even in a disastrous situation. The following ten factors should be taken into account when selecting a precision metal stamping supplier:

 

  1. Years of Experience
  2. Ability to Design Precision Stamping Dies
  3. Ability to Build and Troubleshoot Precision Stamping Dies
  4. Process Control
  5. A Die Maintenance Program
  6. Delivery Time Frame
  7. Running Speed
  8. Spare Tooling
  9. “Attention to Detail”
  10. The Ability to Perform Secondary Operations

 

First and foremost, it is essential to select a precision metal stamping supplier who has significant experience. Make sure that you take the time to understand how long a supplier has been in business, and to become familiar with the types of components that they have stamped in the past. It is important to know if a supplier’s expertise is in flat parts, formed parts, or both. Take the time to learn about the supplier’s experience in working with difficult, intricate parts, their ability to hold tight tolerances, and their ability to achieve complex bends (on formed parts).

 

The second and third factors to consider are whether the supplier has experience in designing, and building precision metal stampings. A supplier who can design and build precision metal stamping dies will inevitably be much more qualified to succeed in stamping your components than a supplier without these capabilities. A supplier who designs precision metal stamping dies understands the importance of having certain features and stations in a die which will result in the highest efficiency and quality during the stamping operation. A supplier who is adept at building and developing precision metal stamping dies has the added benefit of being able to troubleshoot any unplanned stamping issues.

 

The fourth factor to consider when selecting a precision metal stamping supplier is the supplier’s capability in the area of process control. If a supplier is ISO-certified, this provides a certain layer of insurance that control processes are in place. Understanding how a precision metal stamping supplier creates and works with control plans is important. Visiting the supplier and seeing their Quality system in operation is probably the best way to evaluate a supplier’s attention to process control. Determining the role of the Quality technician at a supplier will speak volumes to assuring that a job will end up successful. Evaluating a supplier’s investment in inspection equipment is an additional indicator of potential success.

 

Next, it is beneficial to determine if a precision metal stamping supplier offers a die maintenance program. This will result in maximizing the life of the die and will optimize your total life cycle cost for your stamped component. A good die maintenance program will address die and die component inspection, synchronization and adjustment of die/press/peripheral equipment, proper assembly/disassembly techniques, die component replacement schedules, etc.

 

Sixth, a precision metal stamping supplier’s delivery track record will reveal whether or not a supplier has the proper systems in place to not only quote a good delivery time frame, but actually to deliver on-time. If a precision metal stamping supplier is not officially tracking their on-time delivery performance, then it is better to select another supplier.

 

The precision metal stamping supplier’s ability to achieve certain running speeds is the seventh factor that should be considered. An experienced supplier will be able to run at faster speeds (while maintaining quality), and consequently provide the most optimized pricing.

 

The eighth factor to consider is spare tooling. Often overlooked, a discussion of a spare tooling list is critical to a precision metal stamping job. A good supplier will suggest discussing spare tooling up front in order to maximize the likelihood of success for a stamping campaign. Make sure that this cost is taken into account when judging one quote against another. Require all bidders to address spare tooling. If a precision metal stamping supplier has the added capability of being able to manufacture its own spare tooling, this is an obvious benefit.

 

Next, it is important to determine if a precision metal stamping supplier is one that will pay close attention to the “fine details” of a job. In addition to looking at the quality of a supplier’s previous sample parts, try to determine if a supplier is concerned about fine details by noticing their behavior early in the quoting process. A supplier who asks a lot of questions pertaining to part quality, key features, and tolerances is typically one who will likely over-deliver in the area of “attention to detail”.

 

Lastly, a precision metal stamping supplier who has the added capability of performing secondary operations is invaluable in area of overall supply chain logistics. A supplier that can perform any of the following additional operations will typically result in significant savings for your company: cleaning, electroplating, packaging, product assembly, custom automation (in conjunction with the stamping operation), and machine vision inspection.

 

Coolmosa is a 20-year-experience stamping parts company, offering metal stamping parts, metal parts custom stamping, precision stamping parts for cooler field. Have ISO 9002 approval, they provide the most comprehensive stamping parts solutions in the industry. For more metal stamping parts information, please feel free to send inquiry to Coolmosa Technology Co., Ltd.

 

With a long reputation as a chief manufacturer of stamping parts, Coolmosa will be your right choice on your business needs.

 

 

Article Source: http://EzineArticles.com/3597384