The Best Casting Process for Your Needs

Posted on January 29, 2018 by Camille F.

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/

Precision Metal Stamping – How to Find a Qualified Supplier

Posted on January 24, 2018 by Camille F.

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:

Years of Experience
Ability to Design Precision Stamping Dies
Ability to Build and Troubleshoot Precision Stamping Dies
Process Control
A Die Maintenance Program
Delivery Time Frame
Running Speed
Spare Tooling
“Attention to Detail”
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

5 Major Advantages to Using Plastic Injection Molding for the Manufacturing of Parts

Posted on January 22, 2018 by Camille F.

Plastic injection molding is extremely versatile method of producing parts and products. It is one of the preferred methods for manufacturing parts because it has multiple advantages over other methods of plastic molding. Not only is plastic injection molding simpler and more reliable, it is also extremely efficient. You should have no doubts about using this method to manufacture parts.

Here are 5 major advantages of using injection molding for manufacturing plastic parts and components.

Detailed Features and Complex Geometry

The injection molds are subjected to extremely high pressure. As a result the plastic within the molds is pressed harder against the mold compared to any other molding process. Due to this excessively high pressure, it is possible to add a large amount of details into the design of the part.

Furthermore, due to high pressure during the molding process, complex and intricate shapes can easily be designed and manufactured which otherwise would have been too complicated and expensive to manufacture.

High Efficiency

Once the injection molds have been designed to the customer’s specifications and the presses pre-programmed, the actual molding process is very quick compared to other methods of molding. Plastic injection molding process hardly takes times and this allows more parts to be manufactured from a single mold. The high production output rate makes plastic injection molding more cost effective and efficient.

Enhanced Strength

In plastic injection molding, it is possible to use fillers in the injection molds. These filler reduce the density of the plastic while it being molded and also help in adding greater strength to the part after it has been molded. In fields where parts need to be strong and durable, plastic injection has an option that other molding processes do not offer.

Ability to Use Multiple Plastic Types Simultaneously

One of the major advantages of using plastic injection molding for manufacturing parts is the ability to use different types of plastic simultaneously. This can be done with the help of co-injection molding, which takes away the worry about using a specific type of plastic.

Automation to Save Manufacturing Costs

Plastic injection molding is an automated process. A majority of the injection molding process is performed by machines and robotics which a sole operator can control and manage. Automation helps to reduce manufacturing costs, as the overheads are significantly reduced. Furthermore, with reduced labor force the overall cost of manufacturing the parts is reduced and this cost saving can easily be passed on to the customer.

Furthermore, automation allows for making precise and accurate injection molds. Computer aided design (CAD) and computer aided manufacturing (CAM) allow close tolerances during the making of the molds.

The Bottom Line

Using injection molding also ensures the parts manufactured hardly require any work after the production. This is because the parts have more or less a finished appearance after they are ejected from the injection molds.

Today, plastic injection molding is an environment-friendly process. The scrap plastic generated during the production process is reground and re-used. Hence, the process generates very little waste.

Learn more information about plastic injection molding or injection moulding products, try to visit Shin Fang Plastic Industrial. The company can provide a variety of plastic bag accessories for customers. Feel free to contact with Shin Fang.

Article Source: http://nanomoldcoating.com/5-major-advantages-to-using-plastic-injection-molding-for-the-manufacturing-of-parts/

How Do You Choose an O Ring?

Posted on January 19, 2018 by Camille F.

When installing a pressure sensor, especially on units with parallel threads, such as BSP, UNF etc, it is necessary to use an O ring on the external face of the hexagon mounting face to ensure complete sealing.

It is important to choose the right sealing gasket to give long-life performance. Several factors must be taken into consideration when you choose an O ring, including compatibility with the fluid under test, the temperature range of the application, mounting torque, size, pressure ranges etc.

There are many types of seals on the market, from gaskets in copper, lead, Viton, nitrile, Teflon etc. The following are some of the more commonly used seals.

Viton O Rings

Viton O rings are oil resistant and are capable of operating in temperatures between -15 and +200°C.

Teflon O Rings

Teflon O rings have similar properties to Viton, but are used for pressure ranges above 500bar (7000psi).

Dowty Bonded O Rings

Dowty bonded O rings are versatile but relatively expensive. They comprise a metal annulus to which a medium nitrile elastomeric ring of trapezoidal section is bonded. Dowty bonded O rings are commonly used with hydraulic fluids or mineral-based engine lubricating oils. Temperature range is -30 to +110°C, and maximum pressure is 1500bar.

Nitrile O Rings

Versatile and economical, nitrile O rings are suitable for temperatures from -40 to +110°C, and are resistant to mineral hydraulic oils, greases and certain chemicals. Nitrile O rings are available in imperial and metric sizes.

In addition there are now many different adapter ranges available that have built-in seals. Alternatively there is the option of choosing a thread that self-seals or has a cone sealing arrangement, such as Swagelock, -3 fitting etc.

Need more information about O rings? Do not hesitate to visit the professional manufacturer of vehicle and mechanical oil seals – Lian Yu Oil Seal Enterprise Co., Ltd.

You can find high quality oil seals, rubber parts, bonded seals, swivel kits, o rings, and much more products at Lian Yu. Feel free to send inquiry or contact them directly to get further details.

Article Source: https://appmeas.co.uk/resources/pressure-measurement-notes/how-do-you-choose-an-o-ring/

Die Casting Parts Around Your Lives – Learn What Die Casting is.

Posted on January 11, 2018 by Camille F.

Die casting is an important manufacturing technology used in many industries. Companies can make nearly all parts using different casting processes.

What is Die Casting?

According to The Engineer’s Handbook, this is a manufacturing process where solid metals are melted and heated to a desired temperature after which, it is poured into a cavity or mold with proper shape.

The melting and heating process may require different furnace heating temperatures. Moreover, different chemical substances may be added to modify chemical composition of metals.

The process may be a single step of a series steps depending on the complexity of the metal substance. Cast parts may range from fraction of inches to over 35 feet. And final product can have virtually any size depending on what designer desires.

Apart from these, it is also crucial to highlight the major metal casting processes that have been used in this industry.

Sand casting
Lost Wax casting
Permanent mold casting
Centrifugal casting

What Makes Die Casting a Distinct and More Importantly Intriguing?

All the other processes I have listed above are collectively referred to as “foundry processes” except die casting.

Let’s zero into what die casting is.

The Engineering.com defines die casting as a manufacturing process that produces metal parts of virtually all designs by forcing molten metal under high pressure into a die cavity. The underlying factor here is exerting high pressure through a die.

It is a key factor that distinguishes this metal fabrication process from the other metal casting procedures listed above.

For instance, if we look at a process such as lost wax casting, investment casting or sand casting procedures, the underlying factor in this case is the fact that, the process depends on gravity to fill the mold.

The Cambridge Dictionary defines gravity as a natural force that attracts objects towards one another, more so that force, which makes things fall on the ground.

This further reveals more properties of die casting in relation to other metal casting processes.

Here are three key points to note:

Metal die casting process has a short cycle time
Metal flow is faster in die casting due to existence of external force
Molds in die casting are not as thick as those used in the sand casting or investment casting processes

Metal die casting process is used to produce various shapes from a number of non-ferrous metals such as brass, zinc, aluminum, magnesium and copper among other metals.

It is one of those manufacturing processes with the ability to produce high detailed and accurate parts. It is also preferred for mass production of components as opposed to other manufacturing processes. Take for instance, the faucet parts, door knobs, decorative parts, etc.

Die Casting Examples

Die casting is one kind of technology that we have lived to embrace in our day-to-day activities. This is a popular manufacturing process that is used to produce a number of metal parts both for industrial and domestic applications.

For this particular section, we’ll categorize these parts based on where they are used i.e. their industrial or domestic applications.

The most common die casting examples include the following:

Brass Die Casting Parts

These are common examples of die cast parts that we meet in our daily lives. They are available in different configurations. These lamp parts include brass fixture body parts, necks and breaks among others.

Most lighting distributors place their orders to different lighting parts suppliers, and give the brass lamp parts order to a casting manufacturer; this will save them a lot on cost.

Brass Parts May Include:

Brass electrical components such as the socket termination parts and coaxial cables.
Mechanical parts such as those that are used in the plumbing industry. These may include pipe joints, washers, nuts, flanges and T-joints just to mention a few.
House accents such as brass candle holders, vases, canisters, decorative pillows, etc.
Furniture hardware such as door knobs, locks, and handles.
Brass precision components such as clips, connectors and taps among other sections.

Zinc Die Casting Parts

Zinc is also a popular metal that is used in this industry. Normally, the manufacturers have to choose between the ZA and ZAMAK alloy. The choice of any alloy will depend on the desired physical properties of the end product. That is, parts cast using the ZA alloys have superior strength due to high mounts of aluminum. The Zamak alloys offer better castability.

The zinc die casting parts may include window hardware, electrical components, bathroom fixtures and office equipment, just to mention a few.

Steel Die Casting Parts

Like the other metals mentioned above, the steel cast parts also form an integral role of our lives. This involves casting different types of steels such as stainless steel.

Some of the most common components that are manufactured via this technique include valves, hydroelectric turbine wheels, tooling equipment and pumps among other parts in food, electrical and power industries.

All these parts must be manufactured as per the international standards and regulations.

Iron Die Casting Parts

This involves casting a number of iron carbon alloys. These metals have a carbon content that is more than 2%.

Again, the iron casting company should be able to choose that specific metal that can meet the requirements of the end users. This involves determining the carbon content, iron and silicon content.

Aluminum Die Casting Parts

Both aluminum and aluminum alloys are commonly used to cast different machine components. These alloys contain different elements such as copper, manganese, magnesium, silicon and zinc, just to mention few. These elements exist in different proportions thus; different procedures can be used to cast the aluminum parts.

These aluminum die casting parts are used in different industries such as aerospace, electronics, plumbing and chemical industries.

Summary

In summary, there are very many types of components and structured that can be manufactured through die casting. It is upon the end user to choose that kind of metal he/she desired for a given application. However, some may require additional secondary operations.

If you need further details about die casting, I recommend that you can visit the website of Champion H&C Inc.

This company provides various die casting processes for you. Such as aluminum die casting, zinc alloy die casting, etc. Moreover, they also give you CNC lathe machining, CNC turning, CNC milling services. Learn more information, please check Champion H&C website: www.hc-aluminum.com

Article Source: http://www.gatonbrass.com/die-casting/

Pro and Cons of Using a Malleable Iron Pipe

Posted on January 11, 2018 by Camille F.

While malleable iron pipe fittings may sound old-fashioned next to lightweight PVC pipe, it has become valuable once more for solar heating systems, and other applications. Learn more about the pros and cons of malleable iron pipe below.

Pros of Malleable Iron Pipe

Malleable iron pipe fitting is the conduit system of choice for solar heating systems. Most solar heating systems for interior heat and hot water supplies use a dense fluid to trap solar energy. This fluid becomes much too hot for PVC pipes to tolerate, but malleable iron pipe is ideal to transport it. All the fittings of a solar heat system can be made of malleable iron pipe. Malleable iron pipe fitting is also best for cold water plumbing, as it retains its shape in the coldest conditions. Malleable iron is used for galvanized pipe fittings and can be zinc coated for rust and corrosion prevention prior to installation in a plumbing system.

Cons of Malleable Iron Pipe

Malleable iron pipe fitting without a galvanized zinc coating is unsuitable for factories and fluid transport facilities located near ocean and lake docks. It can rust and corrode on exposure to salt and other waterborne minerals. Heavy malleable iron pipe has been replaced by PVC for household plumbing.

If you need more information about malleable iron pipe fittings, visit the website of Golden Highope: www.golden-highope.com to find pipe fittings you need.

Article Source: https://www.doityourself.com/stry/pro-and-cons-of-using-a-malleable-iron-pipe

Self-Tapping Screws: How They Work and How to Use Them

Posted on January 5, 2018 by Camille F.

When looking for fastening solutions, one common solution to use for routinely maintained products is self tap screws.

What Is A Self Tapping Screw?

Self tapping screws are fasteners that are designed to drill their own hole as they are screwed into wood, plastic or metal. By using a screw driver and self-tapping screws, precisely fitted threads are created. Self tap screws are ideal for items that require regular maintenance and work well when working with two different kinds of material being fastened together.

These screws either come with a blunt, flat, sharp or piercing tip. Sharp-tipped self tapping screws drill their own holes in softer wood and plastic. However, it is helpful to drill a pilot hole when working with harder material. When drilling a pilot hole, make sure to use a smaller bit than the screw so it may still serve its purpose.

What material is involved can help determine what type of self tap screw will work best. There are two types: thread-forming and thread-cutting. Thread-forming screws are usually used when working with plastics. Thread-forming screws are designed to stay in place tightly, but over tightening the screw could result in materials breaking under too much pressure. Thread-cutting screws are used mostly when working with metal and wood. One drawback to using thread-cutting screws is that the threads may strip if the application is disassembled. This prevents reuse of the fastener and requires a new, slightly larger self tapping screw when it is time to reassemble.

However, there is a solution to prevent stripping. A metal insert can be installed from the beginning that would allow the self tapping screw to be regularly fastened and unfastened. These metal inserts also work to help minimize stress and expand as the fastener is screwed in.

Just like other types of fasteners, self tapping screws are available in all shapes and sizes and are also available in numerous different head types. When choosing the right self-tapping screw for any given application, it is important to consider the length of the screw tip. In order for the screws to serve their purpose and work properly, the screw must be drilled fully into the material before threading can begin.

Although self tapping screws are typically more in terms of price, they can help cut down on time and labor costs and combine the steps of drilling and fastening.

To learn more about where to find high quality self tap screws, please visit Fu Yeh, the professional screw manufacturer in the industry.

Article Source: http://provenproductivity.com/self-tapping-screws-work-use/

What Is A Tap Reseating Tool?

Posted on December 18, 2017 by Camille F.

Tap reseating tools are plumbing tools used to repair water taps. They are hand tools, but there are attachments available that adapt them for use with a drill. There are two different designs of tap reseating tool, but the variation does not affect performance. They are for use on different tap designs.

Tap reseaters are used to fix one of the possible causes of a leaking tap. A leaking tap can be caused by multiple things and is dependent on the type of tap you have. A leaking tap is most commonly caused by general wear and tear of its parts.

Tap reseating tools repair compression washer taps. The flow of water from a compression washer tap is stopped and started by the movement of a rubber stopper (washer) against a hole (seat) inside the tap body. Tap reseating tools repair the seat of a tap.

What Is A Tap Reseating Tool Used For?

Tap reseaters fix that leaking tap that gets on everyone’s nerves. There are several things that can cause a dripping tap such as a damaged seat. A damaged seat can be easily fixed using a tap reseating tool.

The tap seat is subject to constant use. It is directly below the washer, which is moved up and down every time a tap is used. This movement, along with its constant contact with water, wears down the seat and causes corrosion.

The tap seat is especially delicate in hard water areas where lime scale can build up. The tap reseater can be used a number of times to grind down the seat, but eventually the whole tap will need to be replaced.

Tap reseating tools can also be used for repairing stopcocks in the same way they repair taps. Stopcocks are used to turn off the water supply to internal outlets.

How Does A Tap Reseating Tool Work?

A worn down or built-up seat causes unevenness. This means that when the washer is down there may be room for water to trickle through; causing a drip.

The tap reseating tool grinds away any unevenness on the seat so that it is smooth. This means that the washer is able to sit flush on the seat and there are no gaps for water to pass through.

Where to Find Excellent Tap Reseating Tools?

I recommend one manufacturer to you – that’s Maxclaw Tools Co., Ltd. The company specializes in kinds of tube tools, including tap reseating tools, tube cutting tools, tube bending tools, flaring tools, deburring tools, etc.

If you need more information about tap reseaters, please do not hesitate to check out their website. Find ideal tube tools at Maxclaw.

Article Source:

https://www.wonkeedonkeetools.co.uk/tap-reseaters/what-is-a-tap-reseater/

https://www.wonkeedonkeetools.co.uk/tap-reseaters/what-is-a-tap-reseater-used-for

How to Disconnect a Galvanized Pipe Fitting

Posted on December 15, 2017 by Camille F.

Contemporary plumbers use copper and CPVC pipes to plumb residential water lines, but it’s still common to find galvanized steel water pipes in older homes and outdoor water lines. Galvanized pipes come in diameters from 1/2 inch to 8 inches, with 2-inch and larger pipes normally reserved for industrial use. The threaded pipes connect with threaded fittings. When you need to remove a fitting, you sometimes have your work cut out for you.

Single-Port Fittings

The concept with single-port fittings is simple: tighten your wrench around a spigot or cap connected to a galvanized pipe, and turn it counterclockwise to remove it. The reality is seldom that simple, however, because you will usually find the fitting rusted in place. At the very least, you’ll have to hold the pipe steady with one pipe wrench while you turn the fitting with another. You will need muscle power, too – lots of it. Once you get the fitting to move, the rest is easy, but you sometimes need to augment your best efforts with spray lubricant to accomplish removal.

Two-Port Fittings

Disconnecting a fitting with two ports, like a coupling or elbow, presents a dilemma. The question becomes how to loosen the fitting from one pipe without tightening it onto the other. The answer is that, to loosen the fitting from one pipe, you must first cut it loose from the other. You can cut through galvanized pipe with a hacksaw, but the job goes much faster if you use a reciprocating saw with a metal-cutting blade. Don’t forget to turn the water off before you cut into the pipe, or you’ll be dealing with an uncontrollable spray. You risk a scalding if the water is hot.

Tees and Crosses

The procedure for removing multiple-port fittings like tees and crosses is similar to disconnecting double-port fittings. You must cut all the pipes connected to the fitting but one. Making two cuts on each pipe to remove a small section gives you the clearance you need to turn the fitting. If you plan to replace the fitting, you’ll also have to replace the cut pipes, and replacing one extra pipe isn’t much more work. Therefore, it’s usually more expedient to simply cut all the pipes rather than trying to unscrew the fitting, which is probably locked onto the threads anyway.

Disassembling a Pipe System

When you assemble a system of galvanized pipes, you begin at one end and screw on pipes and fittings in order until you reach the other end. Disassembling the system is the reverse procedure, but you need a free end from which to start. That means cutting through at least one pipe unless there is a union somewhere in the system that you can take apart. When disassembling a system of old pipes that they won’t reuse, plumbers usually don’t go to the trouble of unscrewing them. They simply cut them apart with a reciprocating saw.

By the way, when mentioned galvanized pipe fittings, you maybe think where I can find them? The pipe fittings manufacturer that I recommend you is Golden Highope.

Golden Highope Industrial Inc. Ltd. offers galvanized and malleable iron pipe fittings, their products are designed, manufactured and shipped in compliance with API, ASTM, JIS, DIN, DAN, SMS and many other international quality standards from the spectroscopic tested. MECH is a China well-known brand of galvanized / malleable pipe fittings, which divided into two different series, American standard and British standard.

Learn more specifications of galvanized pipe fittings, welcome to visit Golden Highope’s website: www.golden-highope.com. Feel free to send inquiry to them.

Article Source: http://homeguides.sfgate.com/disconnect-galvanized-pipe-fitting-42178.html

What Are The Different Types of Directional Control Valve?

Posted on December 14, 2017 by Camille F.

In this article, I will list down the advantages and disadvantages of sliding spool and poppet valve.

Types of Directional Control Valves:

Sliding Spool, Poppet / Diagram, Rotary Spool, Rotary Disc, Slide.

Here, I only introduce Sliding Spool Valve and Poppet Valve. Let’s learn more information about them below:

Sliding Spool Valves

Sliding spool valves are the most common directional control valves used in transmission of pneumatic power to the actuator. They are available in various forms and sizes.

Advantages:

The main advantages of spool valves with seals are:

Simple maintenance.
Fully balanced spool design allowing air to be without creating spool movement.
Relatively simple to attach controls.
Stroke limiters can be used.
Available in suitable forms.
Connected to any port

Disadvantages:

The main disadvantages of spool valves with seals are:

Larger body size.
Higher wear rates.
Require lubrication.
Continuous leakage.
Not suitable for high pressure applications.
Slower response time.
Require a better quality air.

Poppet Valves

Poppet valves come in a wide variety of forms and are the most useful valve in pneumatic services. It can be used as the pilot section of a solenoid controlled valve. Poppet valve construction varies in accordance with the valve function and flow requirements.