Category Archives: Machine

How to Increase the Process Speed of Die Sinking EDM

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Developments in the EDM process and its technology along with improvements in accuracy, automation and micro-mold making technology can pay enormous dividends to the domestic mold making industry.

 

Speed Is Not the Solution

Increasing drive speed is one solution to improving the speed of die sinking EDM. In this way the unproductive times for lifting movements are reduced; however, the gain in speed is limited to small electrodes and very deep cavities. In addition, above a certain speed the electrode wear is considerable and very high axis speeds result in extreme strain on the mechanism, make the machine more expensive and shorten its working life. Therefore, it is wrong to believe that a general increase in the process speed is only to be achieved by rapid lifting movements. The contribution of fast axes to the machining process is just one supplementary aspect to a complex interaction that encompasses the generator, process control, gap width regulation and the mechanism. And die sinking EDM requires intelligent flushing.

 

Potential Lies in the Flushing

You can imagine the EDM process as being a balance between the EDMed and evacuated material in the gap. If this balance is not present, then either you flush the machining area unnecessarily—involving a loss of time and additional instability of the process—or you EDM the same particles several times, which cannot be removed from the gap sufficiently.

 

Die Sinking EDM

Before the material can be evacuated from the gap you must remove it from the workpiece. So how can you achieve more removal? As in the case of all optimization problems, the greatest gain potential lies where the efficiency is smallest. The efficiency of a single discharge with a cathodic poled workpiece is theoretically about 25 percent.1 In addition there are some factors that make the efficiency even worse (e.g., process control problems, non-ideal flushing conditions, small gap width), so that realistically you must reckon with an efficiency of less than 10 percent.

 

Removal and Surface Quality Determine the Time Requirement

In the case of EDM, the objective is always to optimize the removal performance of the machining on one hand, and to achieve the surface quality of the workpiece to be machined on the other hand. The workpiece, when machined, is intended to display a certain final roughness and a certain form precision. In addition, two conditions are called for:

 

  1. As small a thermally influenced area of the workpiece surface as possible
  2. As low an electrode wear as possible.

 

These marginal conditions determine the machining time and costs for workpiece production. In practice, a sequence of technological parameters is used because starting out from the roughing to finishing settings, the pulse energy is gradually reduced until the required technological results are achieved. Once again the law of nature applies: you can quickly achieve results of modest quality, but only slowly results in high quality.

 

Physical Processes Show a Solution

The approach toward an ideal state means moving the characteristic curve in the direction of the arrow. That means faster EDM with the same gap width, roughness and wear. If, up to now, the discharge energy of the EDM pulses was increased, regrettably you also only had greater roughness and a greater gap width so that the gains in speed during roughing were lost again through longer finishing. You will find a way to a solution if you return to the basics of EDM theory—to the physical processes leading to the formation of the spark and metal removal.

 

During the discharge, you can identify three main physical phases in succession:

 

  1. The Build-Up
  2. Discharge
  3. Fade Phases

 

In the first phase the discharge canal is built up. After passing through the working medium, the current flows almost exclusively on the surface area of the discharge canal and the anode is partially evaporated by the electron bombardment. The electrode wear mainly takes place here. Every pulse—whether contributing intensively to removal or not— causes microscopic wear. In the discharge phase, the electrical energy supplied causes melting or evaporation of material mainly on the workpiece. The fade phase begins with the switching off of the power supply. The plasma canal collapses and the partially evaporated, partially liquid material is ejected.

 

When to Interrupt Pulses

During the discharge, a crater forms in the workpiece. Fundamental studies of discharges have shown that the growth of the crater in the workpiece stagnates from a certain time. This is because a balance forms between the energy supplied and the energy lost, as well as energy that is used for the maintenance of the plasma and the heat loss to the workpiece and dielectric. This asymptote of the crater growth can be recorded in real time from the spark voltage and current.

 

However, why is the asymptote of the crater growth so important? Because this is the right moment to interrupt the pulse. It is unnecessary to let a pulse last longer if the target radius of the crater and the required roughness have been achieved. You can begin with the next pulse immediately. The time required by the pulse to reach this state also is not constant, as the speed with which a discharge reaches a certain spark base diameter depends on the macroscopic situation in the gap and the local geometry in the spark discharge area. With this first measure alone, you will optimize the number of discharges per unit of time and increase the removal rate.

 

When to Increase the Current

If you now observe the charge’s fade phase you will see that the removal from the workpiece is caused by the collapse of the plasma canal. The sudden drop in pressure—triggered by switching off the power—causes the evaporation and ejection of superheated material. The plasma canal has a very high temperature and pressure. The gradient of its collapse influences material removal. The more abruptly the energy disappears, the better the crater material will be ejected. In order to enhance this effect, a special trick is employed: before the pulse is interrupted, the current is increased briefly. The idea of increasing the pulse current is not new, the innovation is the definition of the point in time when this increase is to take place. The increase in the pulse current has no consequences for the roughness, wear or gap width, but does increase the removal. In addition, as the removal per pulse is greater, you need fewer pulses for the machining, and therefore the wear sinks.

 

Removal Rate Doubles in Part

This new machining strategy (asymptote detection, current increase and pulse interrupt) is the subject of a patent application for its use in new EDM die sinking systems. The results are in accordance with the theoretical reflections, especially where good flushing is guaranteed (e.g., pre-machined workpieces). For these machining jobs removal rates have doubled.

 

Generator Brings Striking Improvements in Performance

The innovative generator offers an increase in productivity of approximately 30 percent; however, up to 100 percent with pre-milled molds that occur increasingly nowadays through synergies with HSM. This refers to all roughing and finishing using copper and graphite electrodes. The advantages are particularly great with good flushing conditions and pre-milled workpieces. These convincing results explain that it is possible to increase the speed and productivity of die sinking EDM, and the potential for improving this technology is still considerable.

 

If you need more information about die sinking EDM, please try to visit the website of Excetek Technologies Co., Ltd. – the company is the well-known brand for its EDM machines. Get more details about Excetek, welcome to check out their product pages and feel free to send inquiry to them.

 

Article Source: MoldMaking Technology

Five Reasons to Use an Automatic Liquid Filling Machine

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Automation in the packaging process creates many benefits for the packaging company. Here we will analyze individual pieces of packaging equipment and explain some of these benefits.

 

The automatic liquid filling machine moves product from a holding tank to the waiting bottles or other containers without the need for operator interaction during each fill cycle.  In automating the filling process, a company can expect to improve the packaging operation in a number of ways, including, but not limited to, the following.

 

  1. Consistent and Reliable Fills

 

Using automatic filler removes the uncertainty from the filling process. Whether looking for a level fill, a highly accurate volumetric fill or using some other specific criteria, the automatic machine ensures that each cycle is completed in the same manner. Consistency and reliability that simply cannot be had by hand filling bottles or containers is easily achievable with the right machine for each project.

 

  1. Speed

 

Once production demand reaches a certain level, it simply becomes unrealistic to hire manual labor to complete each bottle fill. Probably the most obvious benefit of using automatic packaging machinery is the ability of the machinery to increase speeds. Using power conveyors and multiple fill heads along with the proper filling principle allows production to not only run faster, but run constantly.

 

  1. Versatility

 

Many companies use multiple bottles for a single product. A number of companies also run multiple products. In most cases, single liquid filler can be manufactured to handle all bottles and products packaged by a company. Some machines will use simple adjustments to change from one bottle or product to another, while others might require a little more time on changeover where bottle sizes or product viscosity varies greatly from one to another.

 

  1. Ease of Use

 

Almost all automatic filling machinery will come equipped with a PLC and easy to use operator interface. The interface uses a touchscreen that allows the operator to enter the various times and amounts necessary to complete each cycle. Once the numbers are entered, a recipe screen will allow the same to be retained. Eventually, the operator will simply need to enter the recipe number on the interface, make any physical adjustments (conveyor rails, fill head height, etc.) and then monitor the machine as it goes to work.

 

  1. Growth Potential

 

Automatic packaging machines can and should be manufactured with the future in mind. In other words, the machine should not be manufactured to immediately meet maximum capacity. At LPS, we build our equipment expecting our customers to experience growth! Simple additions to filling machines, such as extra fill heads, allow the equipment to grow with the business.

 

While there are other benefits to automating the filling process from project to project, a packager can always expect to receive those noted above.

 

Get more details about automatic liquid filling machine, welcome to visit SHIN I Machinery Works – the company is always your best cooperation partner for packaging equipment machinery.

 

 

Article Source: https://www.liquidpackagingsolution.com/news/five-reasons-to-use-an-automatic-liquid-filling-machine

Stretch Film vs. Shrink Film, What’s the Difference?

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It’s a common misconception that people believe stretch film and shrink film are the same thing. It’s true that both shrink and stretch films are designed to unitize products onto pallets and both are generally made from polyethylene resins. Shrink films are produced on blown film lines and stretch films can be produced on either blown or cast film lines. Outside of those similarities, the two packaging systems don’t have a lot of other common characteristics.

 

Shrink films contain a high percentage of low density polyethylene (LDPE), which is the same type of resin used to make bread bags and newspaper overwrap sleeves.  When fabricated under very specific parameters, LDPE gives shrink film its “shrink”.  The stress or tension required to make the film contract is frozen in during the fabrication process. To activate shrink film, a heat source is required such as a heat tunnel, heat gun, or torch. When sufficient heat is applied to the film, it approaches its melting point and the film begins to draw up or “shrink”. Because the film can only shrink so far, each product to be wrapped has to be matched with a specific size and configuration of film. As film resins go, LDPE does not have good puncture or tear resistance and has a relatively low load holding force. In order to provide sufficient load containment and protection for the load, these films are generally several times thicker than most stretch films.

 

In contrast, most stretch films contain high levels of linear low density polyethylene (LLDPE) and, depending on the end-use application, can stretch from 25 to 300%.  Stretch films are either designed to be applied by hand or by machine. Hand films usually have minimal stretch (25-100%) in order to aid the operator in applying the product and are in many ways similar to a large roll of very thin tape. Machine films on the other hand can have very high stretch levels (150 -300%) and, because they are applied by automated equipment, can be configured to exert very high levels of tension on a load if desired.

 

Shrink films are good for applications where the object to be protected requires five-sided protection (top and four sides) or is very large (boats and industrial equipment). For five-sided protection on finished products such as washer/dryers, refrigerators and other appliances, along with bagged resins and cement/concrete, stretch hooders have started replacing shrink films as the older shrink tunnels are decommissioned and new, more energy efficient equipment takes its place.

 

If you have any interest in shrink film machine, I recommend that you can visit the website of Jumbo Steel Machinery Co., Ltd.

 

For over 25 years, Jumbo Steel has dedicated itself to the research of production technology for PVC shrinkable film. The company has made great improvements in product prescription and machine performance, upgrading the quality and efficiency of PVC shrinkable films. Jumbo Steel PVC shrink film machine has been sold worldwide, and has earned a reputation for its superior machine and outstanding production know-how. Get more details please do not hesitate to send inquiry or contact with Jumbo Steel immediately.

 

 

Article Source: http://www.paragon-u.com/bid/252257/Stretch-Film-vs-Shrink-Film-What-s-the-Difference

Buying a Five-Axis: Selecting the Right Machine

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Horizontal or vertical? Trunnion or swivel head? What’s the effective difference between different configurations of five-axis machining centers?

 

Not all 5 axis machining centers are alike. Here’s where the application for which they will be used must be considered. You need to know what cutting speeds you’re going to run, for example. The type of spindle, the arrangement of rotary axes, rapid traverse rates, feed rates and available horsepower are other major considerations. Do you intend to machine primarily aluminum, stainless steel or titanium? How rigid does the machine need to be? What surface-finish quality do you require? What part accuracy are you trying to achieve? These are all questions you’ll need to answer in order to select the right machine for your application.

 

If you’re primarily machining aluminum, you may prefer a spindle capable of higher speed, such as 20,000 rpm, with higher rapid traverse rates, especially if you’re using smaller-diameter tools. Likewise, if you’re machining stainless or alloy steel for complex mold surfaces, you will likely be using small tools and high spindle speeds to achieve exceptionally smooth surface finishes.

 

Be aware that some machines are designed for cutting only aluminum. Others are suitable for steel and tough alloys, which require more rigidity, higher horsepower, lower spindle speeds, slower rotary speeds, higher torque and stronger box ways to make deep cuts with bigger tools. Machining different grades of steel, titanium alloys or even harder materials may require a heftier machine; however, this hefty machine would need to rotate the table excessively fast to achieve adequate surface speeds for cutting aluminum. The result might be disappointing.

 

When specifying out a five axis machining center, obtaining the expert advice of an experienced engineer is recommended.

 

Horizontal or Vertical

Horizontal five-axis machines are normally equipped with an automatic pallet changer (APC) ready to be installed on the shop floor. If you’re machining aerospace components that have deep pockets or waffling designed to reduce finished-part weight, the high volume of chips will naturally drop into the conveyor. In addition, horizontal five-axis machines tend to be heavier and more rigid, which helps when cutting steel and titanium.

 

In contrast, vertical five-axis machines tend to be more agile for processing smaller parts. VMCs tend to enable better operator access and can often take heavier cuts, but clearing chips can be inconvenient. High-pressure, through-the-spindle coolant delivery comes in handy to remedy chip accumulation.

 

Swiveling-Head or Trunnion Style

There are pros and cons to different types of machine designs. If you’re loading heavy parts, the non-tilting table on a swiveling-head machine is often preferred, because this type of table offers greater rigidity for holding big, heavy parts. The swiveling head enables the use of shorter, standard tooling, because all tool rotations occur above the part. Swiveling-head machines tend to be more versatile, lending themselves to using multiple fixtures, vises or tombstones. This somewhat simulates the appeal of an HMC.

 

A trunnion-style machine is often preferred in moldmaking, because both rotary axes are contained in the trunnion table itself and the spindle head is stationary. This configuration is similar to that of the three- or four-axis machines most moldmakers are already used to. The spindle head reaches out over the tilting table, providing better undercut capabilities and some access to the underside of the part. As the spindle head itself does not rotate, trunnion-style machines tend to be more effective in heavy chip removal and can use full X, Y and Z travels to accommodate large parts.

 

If you need more information about 5 axis machining center, please do not miss Vision Wide Tech Co., Ltd. – the company is the professional CNC machine tool manufacturer owning brand “VISION WIDE”, provides wide range products from heavy cutting to high speed, from 3-axis spindle to 5-axis spindle, and from metal cutting to composite material machining centers which have been applied in vehicles manufacture, power generating, aerial components and so on. Widely applied in curve-based polyhedral machining. Learn more details, welcome to visit Vision Wide immediately.

 

Article Source: Modern Machine Shop

Advantages of CNC Grinding

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Anyone who uses CNC grinding machines is bound to enjoy the numerous advantages associated with the machines. In contrast to traditional grinding, CNC grinding produces very light cuts and fine finishes to your workpieces. The machines also make it possible to use less skilled people and limited supervision to perform your project. When looking for a CNC grinding machine, you will want to buy and use a power tool that will perform your project within the time frames you set. There are many advantages of using a machine that is suitable for grinding your materials.

Machines Work for Longer Without Breaks

Like all other CNC machines, CNC grinding machines can run 24/7, 365 days a year without the need for breaks. The only time that the machines will require to be stopped is during maintenance work. This allows you to carry out your project without any interruptions. In the end, the inconvenience of breakdowns is eliminated.

Produce in Large Quantities

Regardless of the quantity of the material that you want to grind, CNC grinding machines will fit the bill. This is partly because the machines run all year round without interruptions. This will enable you to meet the demand of your customers at all times.

High Levels of Accuracy

CNC machines can be programmed to produce fine surfaces and top-quality cuts with precision. The machine will produce great finishes in line with the specifications you provide in the operating software. This reduces the amount of waste as well as the possibility of products that do not meet the needs for which they are produced.

Software to Improve Performance

CNC grinding machines operate on software. When you want to improve the performance of your machines, all you will need to do is update your software. The latest software will also help you to perform many operations in a single setup. This will help in cutting costs and saving time.

Identical Manufacturing

CNC grinding makes it possible to produce identical products in bulk. When customers request your products in large quantities, CNC machines will help you to achieve identical manufacturing. All the components produced through CNC grinding will be an exact match to each other.

Article Source: Sturdy Grinding

EDM 101: What is EDM and Where to Find CNC Drilling EDM Machines Manufacturer?

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What is EDM?

 

EDM stands for electrical discharge machining, the applications best suited for this metal removal process are those characterized by extremely exacting tolerances and situations that would be extremely difficult or impossible to handle with any other method of machining.

 

Growth of EDM

 

EDM has rapidly earned its place alongside milling and grinding equipment as a proactive, mainstream technology. EDM is best known for its ability to machine complex shapes in very hard metals. The most common use of EDM is machining dies, tools and molds made of hardened steel, tungsten carbide, high-speed steel and other workpiece materials that are difficult to machine by “traditional” methods.

 

The process has also solved a number of problems related to the machining of “exotic” materials such as Hastelloy, Nitralloy, Waspaloy and Nimonic, which are used on a large scale in the aeronautical and aerospace industries.

 

With the reduction in electrode wear and increased sophistication of EDM controls in rams, new EDM processes use simple-shaped electrodes to 3D mill complex shapes. EDM also is being used for polishing small, intricate surfaces.

 

Since EDM does not involve workpiece/tool forces like a mill or grinder, it is possible to EDM shapes that would break conventional cutting tools or be broken by them.

 

Different Types of EDM

 

  1. RAM EDM

RAM EDM, also known as plunge EDM or standard EDM, is the oldest form of EDM machining. It generally consists of an electrode usually made out of graphite that is plunged into a workpiece in order to create a blind-shaped cavity. It can also be used to generate through holes and geometry but these are not the primary uses of the process.

 

  1. Drill EDM

Drill EDM uses rotating concentric electrodes to drill through a workpiece and basically performs the same functions as a drill press, except that the material hardness is not a factor and the accuracy of the finished hole is far superior than what any drill press can produce. It is best used to drill start holes for the wire EDM in already hardened material as well as accurate very small holes for industries like aerospace and medical equipment.

 

  1. Wire EDM

Wire EDM uses a traveling wire electrode (usually .010” diameter or smaller) that goes through the workpiece. The wire, in this case, is controlled by computer following the assigned geometry for the part to be produced.

 

EDM for Tooling Applications

 

When a part requires special / unique conventional cutting tools, electrodes are easy to machine, unlike carbide. Equally important, the wire used by a wire EDM is available as a standard, off-the-shelf component. EDM is a low cost tooling option when you need short run stamping (less than 5,000 pieces) and low volume broaching. With EDM, there’s no need to make a die set. That’s why EDM is used to make sewing machine components and prototypes. Instead of using expensive broaches, EDM is a very attractive form of low-cost tooling. This is a reason companies use EDM to produce splines and gear teeth along with all their metal stamping & mold making needs.

 

Where to Find The Reliable EDM Machines Manufacturer?

 

About this question, I recommend that you can try to visit the website of OCEAN Technologies Co., Ltd.. This company is specializing in kinds of high quality EDM machines. If you need more information about CNC drilling EDM machines, please do not hesitate to check out OCEAN product pages and feel free to send inquiry to them.

 

Article Source: Mercatech, Inc.

Benefits of Having a Precision Lathe

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For complex parts and components, you will always need professional precision CNC machining services. However, for prototypes, simple parts, and short runs, there are also benefits of owning a high precision lathe. Although the machine is automated, it gets its instructions from a human who enters written code. Therefore, to own a machine, you also need an operator qualified to provide it with instructions.

 

CNC machine programming may not be rocket science, but it does require knowledge and skill. However, being in control is the greatest benefit of owning a machine. You have the opportunity to produce what you need whenever you need it. Whether creating a protocol or processing a large run, you have full control. Just remember that there is a financial investment in buying a CNC machine. With many different types of the CNC machine, you can always purchase the one that you would use most and then hire a manufacturer for the other work.

 

Types of CNC Machines

 

Following are the five types of machines most commonly used, although there are others. As you can see, each machine offers distinct benefits.

 

  • Router – A CNC router works by engraving plastic, wood, or metal. Following the entered code, a router can perform simple and detailed engraving tasks.
  • CNC Laser – One of the more advanced types of machine, the CNC laser is similar to a cutter with the exception that it cuts wood and metal. In some instances, this machine also cuts plastic. Regardless of the material, the finished product is perfect.
  • CNC Milling – Widely used, the CNC milling machine moves cutters as well as other tools for cutting metal pieces into specified shapes and sizes. Based on the number of axes that a milling machine has, it falls under several classifications.
  • CNC Lathe Machines – These machines are extremely accurate, but also precise, easy to operate, and capable of producing repeatable parts and components. With CNC lathe machines, you can make 3D molds and shapes out of wood, plastic, and metal.
  • CNC Plasma Cutters – While similar to a CNC router, a plasma cutter setup is not as challenging. With this machine, you can produce 2D molds and shapes out of metal.

 

Seeking Professional Assistance

 

There is nothing wrong with owning your own CNC machine and being in control of production. However, when you need outside help, you can try to send inquiry or contact with SHUN CHUAN Machinery. They are the professional and reliable manufacturer of CNC lathe machines. Get more information about precision lathe and other CNC machines, please do not hesitate to check out Shun Chuan website: www.sunmaster-cnc.com and contact them immediately.

 

Article Source: https://www.nexgenmachine.com/benefits-of-having-a-precision-cnc-machine/

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 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