B2B Electronics

A plastic granulator is a machine or a device which transforms large plastic objects into tiny granules by the form of shredding. They were introduced recently to recycle huge plastic goods and this has proved to be a success in the manufacturing industry. Plastic is used a lot by the people in the world for multiple reasons. From use and throw cups to huge barrels, plastic is used by every layman in this world. It is reliable, cheap and long lasting. Some of the disposable plastic goods are a nuisance because landfills are caused due to them. Plastic is good only when it is used as a medium of storage. Day to day wastage of plastic can lead the earth to become infertile very soon.

Plastic is a multipurpose material and many huge objects are made out of it. However, with passage of time these objects get deteriorated or damaged due to overuse. It is time for them to be discarded and new ones to be brought into use. It is not advisable to discard large plastic goods because that will result in pollution and can cause global warming to take a hike. Therefore, huge plastic stuff is processed through a plastic granulator which turns them into small flakes that can be used as raw material to make other plastic goods. This way, plastic is recycled, pollution is reduced and more plastic is not produced.

Plastic granulators are one of the many important devices used in the 21st century. They basically work on electric power just like any other machine. The attached blades keep spinning with the help of the motor. When a plastic object is passed through, it is converted to small “granules” and hence the name “plastic granulator”. On the downside, they are very expensive and require a lot of maintenance. This is not suitable for small firms and that is why plastic shredders are on the go these days.

In spite of all these demerits, a country needs to employ plastic granulators to reduce the production of plastic and to promote the need for recycling.

Song Ming Machinery Industries Co., Ltd. is the pre-eminent recycling machinery manufacturer and also provides waste plastic recycling plant, granulator, shredder, high speed mixer, vertical cooling blender, PVC compounding line, EVA, TPR, PVC, rubber & master batch pelletizing plant, PET bottles washing, crushing, & separating system and others.

In order to supply the best recycling machinery to the valuable customers, Song Ming strains every nerve to constantly upgrade the designs, products and knowledge of plastic recycling machine. We are proud of our superior standard of recycling machinery that keeps them being one of the leading companies in the recycling machine industry. If you need further details about granulator or other recycling machinery, welcome to visit our website and feel free to contact Song Ming!

SONG MING MACHINERY IND., LTD.

No. 5, Alley 15, Lane 182, Industrial Road, Chung Ho Village, Lung Ching, Taichung, 43407 Taiwan R.O.C.

TEL: +886-4-26390123, 26398161

FAX: +886-4-26398162

E-MAIL: sonmin@ms16.hinet.net

Article Source: http://EzineArticles.com/5693459

Electrical discharge machining (EDM) is a type of machining operation used for shaping conductive workpieces into geometrically complex parts. Electrical discharge machines are particularly ideal for machining components that have complicated contours or subtle cavities that would be difficult to produce with other conventional machining equipment. The process involves supplying electricity to both the shaping tool as well as the workpiece and then bringing the tool into close proximity with the workpiece, which is completely immersed in a dielectric fluid bath. This proximity causes the electrical field intensity between the tool and workpiece to overcome the strength of the dielectric fluid, and produces a series of electrical discharges between them. These electrical discharges remove material from the workpiece, and the pattern or shape of material removed is dependent on the shape of the tooling electrode. After the machining operation, the dielectric fluid is replaced between the electrodes. Apart from acting as a dielectric between the two electrodes, the fluid also plays a key role in the machining process, as it is used to flush away the removed material and cool the machined area. The nature of the process is such that, while material is being removed from the workpiece; the tooling electrode is also gradually eroded, making periodic replacement necessary.

The electrical discharge machining process is extremely precise and generally used in the production of components that are typically complex and require extreme accuracy. In addition, another area of application that EDMs perform above par is in the machining and shaping of hard or exotic materials such as titanium, Hastelloy, Kovar, Inconel, as well as hardened steel. However, the only caveat with the electrical discharge machining process is that it can be only be used with conductive materials.

There are essentially two types of electrical discharge machines, which differ in the type of tooling electrode that they are outfitted with. They are sinker EDMs and wire EDMs. The sinker EDM, also known as a ram EDM uses a shaped tooling electrode to facilitate the machining process. This tooling electrode is formed by conventional machining into a shape that is specific to the application it is used for and an exact reverse of the shape to be machined into the workpiece. The tooling, typically machined from graphite, is used with an insulating fluid such as oil or other dielectric fluids. This shaped tooling is connected to a power supply and made to approach the workpiece electrode, creating electrical discharges between them, which cause erosion in the desired shape. This type of EDM is typically used for precise machining of complex 3D parts, such as injection molding, die tooling, and other components that require exceptional accuracy.

The wire EDM, on the other hand, is an electrical discharge machine that uses a fine metallic wire, usually made from brass, which acts as a cutting electrode to accurately shape intricate, complex components from thick metal plates. The wire and workpiece are both supplied with electricity and when the wire approaches the workpiece, electrical discharges occur between them. These discharges remove material from the workpiece in a shape that is similar to a cutting or slicing action. As the wire electrode is eroding along with the workpiece, it is continuously fed into the workpiece from a spool to ensure uninterrupted cutting operation. The wire is fed through two guides, typically made from diamonds, each placed above and below the workpiece electrode. These guides are movable on a 2-axis x-y plane and are CNC controlled for cutting. The cutting operation occurs on a workpiece that is completely immersed in a dielectric fluid bath, normally de-ionized water, which is used as a coolant and to flush away the removed material. This machining process is used to cut complex and intricate 2D shapes on thick metal parts, especially components from hard and exotic metals such as Inconel and titanium. Some components commonly machined using wire EDMs are stripper plates, custom gears, and other parts that need to be intricately cut out. However, the advent of upper guides and multi-axis freedom of movement in the newer wire EDMs, allows these machines to cut intricate tapers and transitional shapes as well.

Welcome to visit EXCETEK, the leading manufacturer of wire cutting machine, established in 2006 specializing in various series of wire cutting EDM machines (Electrical Discharge Machining). We insist to provide only the best electrical discharge machines and related accessories to our clients around the world, and we have also earned well reputations by high quality wire cut machines we manufactured. For more specification, please browse our product list and feel free to contact us, the superior EDM machine manufacturers to get more wire cutting machines and electro discharge machining.

EXCETEK TECHNOLOGIES CO., LTD.

No.10, Fenggong 3rd Rd., Shengang Dist., Taichung City, Taiwan

TEL：+886-4-2520-0688

FAX：+886-4-2520-0111

E-mail：info@excetek.com.tw

Article Source: http://EzineArticles.com/3778819

A grinding machine is a machine used for grinding and cutting materials. It uses an abrasive wheel as the cutting tool. The machine is comprised of a power-driven wheel that spins at the required speed. It also boasts a bed to hold the pieces. The speed depends on the diameter of the machine and is calculated by using a formula, while the grinding head can be controlled to move across a particular workpiece or the workpiece can be rotated while the head of the machine remains fixed. Accurate handling of the machine is possible using a vernier calibrated hand wheel.

This kind of machine is generally used to cut small pieces from an entire workpiece to make it look more perfect and flawless. In fact, grinding machines remove material from the workpiece by abrasion which creates a substantial amount of heat. Thus a coolant has been incorporated so that the machine does not get damaged due to overheating. It also proved to be helpful for the man operating it because the heat causes burns in most cases.

These machines are widely used in heavy-scale industries. This machine uses aluminum oxide and silicon carbide to enhance the abrasive nature of the wheel. The machine can be operated as per your requirements. If you want to grind the internal surface then a smaller wheel rotates inside the workpiece and if you want to grind the surface then you need to keep the machine on a flat table. Due to these features, it is now in great demand.

In the market various kinds of grinders are available. You can find the following:

• Belt grinder is usually used to process materials and metals. It is suitable for all kinds of applications like finishing, debarring, and stock removal.

• Bench grinder is manually operated and is used for roughing and finishing purposes.

• Cylindrical grinders have many grinding wheels which are used to form a cylinder.

• Surface grinders are also manually operated or have CNC control. The workpiece is rotated on the grinder on a table that has a magnet.

• Tool and cutter grinder performs the minor functions of drill bit grinder.

• Jig grinders are used to grind holes and pins.

Each of these machines is available at different prices. Though the range of prices varies as per the machine they are generally very costly. Hence it is best to seek help from the financing firms. Due to the wide use of the internet today, you can get detailed information about the financing firm sitting at home only and can also enjoy the process of online application. This is not at all time-consuming and hence is very convenient.

All kinds of grinding are possible through the CNC grinder. The high-precision machine can perform complex work in no time. It also does not require a coolant, since the heat produced in this machine is quite negligible. It is an asset for the company that owns it. Investing in this machine eases a lot of heavy and strenuous tasks. The percentage of perfection is quite higher as compared to manual labor because these machines are generally computerized. Though quite expensive, reliable financing firms might relieve you of the monetary burden and would enable you to acquire the machine that is the key to a profitable and successful business.

Article Source: http://EzineArticles.com/3206913

What are stainless steel self drilling (Tek) screws?

The ‘Self Drilling Screw for Metal’ or ‘Stainless Steel Tek Screw’ is a screw designed to self-drill into metal. There are several material types available and they each have their strengths and weaknesses.

Why does the grade matter?

Getting the material right for your application is critical. Some Stainless grades have excellent corrosion resistance (304 and 316) but are relatively soft and will not self-drill through much more than thin aluminum. Other grades like 410 are heat treated and have excellent hardness – but anywhere near salt-water (or any sort of coastal atmosphere) and you will see some tea-staining pretty quick!

Some Stainless grades such as Hardtec and Marutex offer the benefits of both (hardness and excellent corrosion resistance) – but are only available in Hex Washer Face Head style. Getting the right material grade and screw type for your application is critical.

So, what stainless steel self drilling (Tek) screws are available?

The Stainless Steel Self Drilling Screws are generally available in 4 main material types within the Stainless range, they are:

Bi-Metal Self Drilling Screws – these are not completely Stainless, the Bi-Metal screw generally has a 304 Stainless Steel body with a Carbon Steel tip. Because of the Carbon Steel tip they are very hard and good for drilling but they are not 100% Stainless Steel. They usually have a 500hrs Salt Spray Protective Ruspert Coating on them to increase corrosion resistance somewhat.

410 Stainless Self Drilling Screws – These are completely Stainless. 410 is a Martensitic Stainless and so can be hardened by heat treatment (which Austenitic types 304 and 316 cannot be). For this reason it has excellent drilling properties – however 410 has lower corrosion resistance than grade 304 and should not be used in highly or even moderately corrosive environments or tea-staining will result.

304 and also 316 Stainless Self Drilling Screws – Because the 300 series of Stainless Steels are of an Austenitic crystal structure – hardening by heat treatment like the 410 grade is not possible. These 300 series screws provide excellent corrosion resistance but are really only good for self-drilling through thin aluminum due to the softness of the grade. Also known as A2 (304) and A4 (316) in Europe.

Hardtec/Martuex Stainless – Both ‘Hardtec’ and ‘Marutex’ are propriety grades of Stainless Steel, made specifically for Stainless Self Drilling Screws. They are hardened by heat treatment and so have excellent drilling performance into metals like grade 410 BUT unlike grade 410, these grades have Molybdenum added to them and have corrosion resistant properties in line with the 300 series Stainless grades. Salt Spray tests show corrosion resistance equal or better to that of 304 grade and not far behind 316 Stainless Steel. They are an excellent screw!

Carbon Steel Tek Screws (Self Drilling Screws) are also available in Class 3 and Class 4 (with a galvanized surface) in Australia and New Zealand. These are commonly used in steel roofing. Aluminum versions are sometimes used for Aluminum cladding (to prevent Galvanic Corrosion from dissimilar metals). However Stainless Self-drilling screws provide the greatest corrosion resistance, particularly when the superior Hardtec grade is used.

Fu Yeh is a superior manufacturer for Self Drilling Screws such as hex washer head, hex flange washer heads, modify truss head, large wafer head, and Lotus head with stainless steel head cap and bugle head self drilling screws etc.. Fu Yeh holds honesty as our principle to server customers for long-term cooperation within customers, suppliers and crafts. We also hope that we could build up close partnership for mutual profit. If you need more details about self drilling screw or other screw series, welcome to visit our website and feel free to contact Fu Yeh!

Article Source: http://EzineArticles.com/8062075

Short for aromatic polyamide fibers, aramid fibers are composed of high-strength, heat-resistant synthetic polymer fibers. Chemically, they are a combination of long chainlike molecules linked by strong hydrogen bonds.

The first aromatic polyamides were produced in the early 1960s, with the first commercial product being a meta-aramid fiber from DuPont called Nomex®. Thanks to its strength and heat resistance combined with tactile characteristics that were close to normal textiles, Nomex® was quickly adopted for a number of uses including protective apparel, insulation, and more.

Types

Today, tens of thousands of tons of meta-aramid and para-aramid fibers are manufactured each year by multiple manufacturers under several brand names.

By chemistry, there are numerous types of aramid fibers. The Federal Trade Commission defines an aramid fiber as any manufactured fiber with a long-chain synthetic polyamide that has a minimum of 85% of its amide linkages attached directly to two aromatic rings. Classifying aramid fibers by commercially branded products, their types include or have included:

• Kevlar®
• Nomex®
• Technora®
• Twaron®
• Conex®
• Arawin®
• New Star®
• Kermel®

High-performance aramid fibers can transfer mechanical stress with high efficiency while maintaining a low molecular weight. The hydrogen bonds are aligned, for the most part, along the fiber axis, which gives them remarkable strength and flexibility.

Aramid Fabrics and Fibers Features

Aramid fibers are renowned for their high tensile strength. Aside from their resistance to abrasion and piercing, they also have high resistance to organic solvents and fire. They have no melting point, only begin to degrade at extremely high temperatures, and also have low flammability. Nomex® starts to decompose at around 350° C while Kevlar© and other para-aramids do not degrade until above 500° C. The fibers also operate well freezing temperatures and are nonconductive.

Aramid fibers have strength per unit of weight several times that of steel, aluminum and E-glass, and are lighter than fiberglass. The fibers are not totally indestructible, however, as they are sensitive to UV rays, acids, and salts.

Applications

Their unique properties of high strength, low weight, and flame and solvent resistance have made them useful in an array of applications.

• Ballistic armor, in the form of vests and helmets
• Flame-resistant and heat PPE for firefighters, pilots, race car drivers, and others
• Asbestos replacement
• Mechanical reinforcement in rubber goods, such as tires
• Support ropes and cables
• Optical fiber cables
• Sporting goods (e.g. tennis strings, skis, snowboards, golf club shafts, hockey sticks)
• Musical equipment (e.g. drumheads, wood instrument reeds, loudspeaker diaphragms)
• Marine applications, such as boat hulls and sail cloth
• Helicopter rotors
• Solid rocket motors
• Compressed natural gas tanks
• Pipelines
• Aircraft panels
• Lightweight bicycles
• Filter bags and other filtration devices
• Automobile parts
• Materials

Aramid fibers are long chain-like molecules composed of oxygen, carbon, hydrogen, and nitrogen. For manufacturing, aramids are formed into a polymer by the reaction between an amine group and a carboxylic acid halide group. These stiff polymer molecules have a strong crystal orientation and close interaction between polymer chains due to their strong hydrogen bonds.

Aramids are made into fiber form by spinning the dissolved polymer into a solid fiber form. During the production process they can be manufactured into a fiber, chopped fiber, powder, or pulp form. The manufacturing methods include hand lay-up, vacuum bagging, vacuum infusion, resin transfer molding (RTM), RTM light, press molding, filament winding, and pultrusion.

Selection

Kevlar® has outstanding strength-to-weight properties and an extremely high tolerance to heat that has made it one of the most popular aramid fibers for bulletproof vests. Nomex®, while not as strong as Kevlar® and para-aramid variants, has excellent thermal, chemical, and radiation resistance that makes it a popular fiber for protective firefighter apparel and hazardous material suits.

Standards

• A-A-50195—Aramid thread
• FORD ESB-M9H112-A—Protective, nonwoven, aramid fabric
• ISO TS 17920—Fibre ropes for offshore stationkeeping – Aramid

Taiwan Electric Insulator was established in 1978 as a manufacturer of aramid fabrics, including aramid fiber fabric, ballistic aramid fabric and colored aramid fabric. The aramid fabric features flame resistance, outstanding shock absorption, and superb engineering benefits to all manners of manufacturing and design in the composite industry. To go with the ever-changing requirements, Taiwan Electric Insulator is dedicated to development and innovation of aramid fabric to meet the highest level of customers’ satisfactions. Find more details about aramid fabric, please contact us now!

Article Source: http://www.globalspec.com/learnmore/materials_chemicals_adhesives/composites_textiles_reinforcements/aramid_fiber_aramid_fabrics