Deep recycling industries specialize in manufacturing and exporting a variety of Brass components, as per client's requirement. The products ranges of Brass Fasteners are from Brass Anchors, Brass Nuts, Brass Washers, Brass Molding Inserts

Deep recycling industries specialize in manufacturing and exporting a variety of Brass components, as per client's requirement. The products ranges of Brass Fasteners are from Brass Anchors, Brass Nuts, Brass Washers, Brass Molding Inserts, Brass Wood Screws, Brass Neutral Links to Energy Meter Terminals, Energy Meter Screws. The list doesn't end here. There is more, such as Toggle Switch Parts, Brass Nipples, Brass Faucets, Brass Adapters. We manufacture the above mentioned products for various industries like Electronic & Electrical, Sanitary ware Applications, Wood Working Tools, Automobile Industry, etc.

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www.dri.co.in
www.brasssanitary.com

These Brass Neutrals are installed in various types of Distribution Boards, Panel Boards, Switch Gears and Electrical Switch Boards

We manufacture Brass Neutrals in various sizes & dimensions like:
	Brass Neutral 12 Holes
	Brass Neutral 17 Holes
	Brass Neutral 19 Holes
	Brass Neutral 25 Holes
	Brass Neutral 30 Holes
	Brass Neutral 35 Holes
	Brass Neutral 40 Holes and many more..
These Brass Neutrals are installed in various types of Distribution Boards, Panel Boards, Switch Gears and Electrical Switch Boards
	Size: Shall be manufacture only as per Customer's specified Drawings and Samples.
	Threading : Various types and sizes of Threading like B.S.W., B.S.F., B.S.B., B.S.P. & B.S.P.T as per British Standard Whitworth Form and N.C. & U.N.C., N.F. & U.N.F., N.P.T & N.P.S., N.S., N.E.F. etc as per American National Form Threads are available. All threads shall be as per International GO & NO-Go Standards.
	Plating/Finish Available: Various types of Plating/Finish like Natural, Nickel, Silver, Tin or as specified are available as per specified layer of microns.
	Material : High grade free cutting brass as per IS 319 (Type 1) or BS 249 (Type 1) or any other special Brass material composition as per customer requirement.

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www.brasselectricalparts.com
www.dri.co.in

brass components

Deep Recycling Industries
successfully service the diverse requirements of the copper tube, Brass Parts, and Brass tube, brass electrical parts
market which includes applications in

· Water supply Brass Inserts PPR fittings
· Drainage and sanitation
· Gas reticulation
· Refrigeration
· Heating
· Air conditioning
· Electrical components  , Control panel , earthing accessories

· General engineering

With many years experience supplying international customers

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PPR Fittings ppr pipe brass insert brass Insert brass ...

We are professional brass fitting,brass pipe fitting,brass tee,elbow
fitting,brass thread fitting,fitting for pex pipe, ppr fittings,press
fitting, plumbing fitting, brass compression fitting, valve, faucet,
manufacturer and supplier in india. We can produce brass fitting
according to your requirements.More types of brass fitting, thread
fitting,plated chrome fitting wanted Brass Compression fittings for PE
pipe Straight nipple male Elbow male Elbow double, Elbow female, Tee
male, Tee, Tee female, Straight nipple male, Straight nipple female
Elbow male Compression fittings for PE pipe .

Brass Male Inserts Female Inserts PPR Fittings Brass Female Inserts
PPR Fittings Brass Male
Inserts PPR Fittings ppr pipe brass insert brass Insert brass ...

http://www.deepri.com/brass-ppr-inserts.htm

Precision Turned Components, Brass Fittings, CNC Turned Parts Manufacturers

Precision Turned Components, Brass Fittings, CNC Turned Parts Manufacturers
Manufacturers of Precision Turned Components, Brass Fittings and CNC Turned Parts
We welcome you to the world of DEEP RECYCLING INDUSTRIES. A company with a vision to 
 produce Precision Turned Components , Brass electrical, neutral links, terminal bars,
for the global market.

We at DRI in a short span have made inroads into the world market. 
 What we do best is help you. As a global leader in the manufacture and export of micro precision 
Brass Fittings and CNC Turned Parts, we work very closely with some of the leading consumers 
 and suppliers of Brass INSERTS of the world using our expertise to improve performance with innovative, 
value added products.

 

Neutral Links Bars & Terminal blocks

Neutral Links Bars & Terminal blocks are used as an accessory in Panel Boards & Electrical Board in Industries like Electrical, Electronics & Telecommunications. It is a considered as a backbone in Building Circuit Protections such as MCB, Switchgears, Circuit breaker, RCD etc. Panel Board (Distribution Board) comprising of copper bus bars, brass neutral links, and earth links to facilitate effective distribution of current. It incorporates safety devices such as MCBs, ELCBs and Isolators, which serves to protect the installation. Brass Neutral Link/Bar & Terminals are very crucial components in every application of its nature. It plays major role in Isolation of Electric equipment & clearing faulty downstream, by means of Switchgear and preventing short circuit & protecting electric circuit from damage caused by overload, in the form of Circuit breaker & so on. Because we understand this criticality, we are committed to deliver high class royal quality Brass Neutrals Links & Terminals as per International Standards & Specifications,

PCB UNIVERSAL SCREW TERMINAL BLOCKS, Pluggable Terminal Block, TB series Fixed Terminal Blocks, circle pre insulated terminal block, terminal connector, terminal block factory, BS Fused Terminal blocks - screw less wire clamp, KF15E Terminal Block

deep recycling industries

Brass Casting

Brass Casting, as the name suggests, involves the use of brass as the molten metal. Metal Casting can be carried out by the way of sand casting only. Sand casting can be defined as a 'cast part' produced by formation of a mold from a mixture of sand and pouring the casting liquid (mostly molten metal) into mold. Then the air-cooling of the mold takes place. After the solidification of metal, the removal of mold takes place. The metal used here is brass. It is a known fact that brass is an alloy of copper and zinc. Hence, to be precise, the molten metal consists of two elements.

Sand molding consists of two types- 'Green sand' molding and 'air set' molding. The first one consists of a blend of moisture, clay, silica sand and other additives. The second one makes use of dry sand bonded to all the above materials except moist clay, by the way of using an adhesive, which is fast curing.

At times, there is a placing of a temporary plug (in the mold cavity) to enable the formation of a channel to pour the fluid which is to be molded. The molds of the second type, i.e. the air-set molds result in the formation of a 2-part mold. The two parts are bottom and top. The tamping-down of the sand mixture takes place as it gets added. Many a times, the final assembly of the mold is vibrated to get the sand compacted and get the unwanted voids filled. Then the molten alloy (brass) gets poured into mold. After the solidification and cooling of brass, the separation of casting from sand mold takes place. Normally, such molds are one-time usable.

Patterns: A designer or an engineer provides the design of the object to be produced. On the basis of this design, a pattern is built by an efficient pattern maker by the use of plastic, metal, or wood. Polystyrene can also be used. The DIY Metal Casting would get contracted during solidification. Non-uniformity can also result out of this. Therefore, the size of the pattern should be a bit larger as compared to the final product. 'Contraction Allowance' is the name given to this difference. Brass enters the mold cavity through a runner system including sprue and other feeders.

--
Divyang A. Pandya

The metal used here is brass

The metal used here is brass. It is a known fact that brass is an alloy of copper and zinc. Hence, to be precise, the molten metal consists of two elements.

Metal Casting has endured through the ages since the time of Ancient Egypt, possibly longer. Since then small foundries have developed to meet the needs of the individual caster. There are several reasons that people choose to create their own home grown foundries. A top reason is the need to create parts and pieces that are no longer available on the market or that are just too expensive to purchase. Those who get into Metal Casting for this reason are usually interested in restoration projects, home improvement projects, or hobby building like model planes and trains. Artists are the other group that see metal casting as a cheap and easy way to create sculptures from small to large. Jewelers even use metal casting to create complex pieces that would just otherwise be impossible to create.

Brass Sanitary (C.P.Parts) Parts

Brass Sanitary (C.P.Parts) Parts, Reducing Hex Bush ,
Tee, 3 PC Connector, Reducing Hex Bush, Tee 3 PC Connector, CP Socket
Double Nipple, Elbow, CP Socket, Double Nipple, Elbow, Extension Piece
Extension Reducer, Grohe Nipple, Extension Piece, Extension Reducer
Grohe Nipple, Hex Nut / Check Nut, Barrel / Long Nipple, Hex Nut / Check Nut
Barrel / Long Nipple

Brass Screw

Since 2000, We are in trade of brass components fasteners and well equipped with technical and experienced staff to look after the quality of all the products. We assure that all parts which we supply are totally compatible and tolerances are in accordance with original equipment specifications.

Our production stringent quality control tests. Which results our products to be of world class. To meet the global demand of increasingly high standards, our plant is managed by highly skilled staff, right from purchasing raw material to finished good. Attention to detail at all stages of production has enabled us to live up to a reputation of delivering on schedule.

Manufacturers of Brass screws Brass nuts Brass washers and Brass fasteners are not well versed with various DIN standards for fasteners.

Manufacturers of Brass screws Brass nuts Brass washers and Brass fasteners are not well versed with various DIN standards for fasteners. Here is the list-
DIN 84 DIN 85 DIN 93 DIN 94 DIN 95 DIN 96 DIN 97 DIN 99 DIN 124 DIN 125 DIN 126 DIN 127A DIN 127B DIN 128A DIN 128B DIN 137A DIN 137B DIN 186 DIN 188 DIN 258 DIN 261 DIN 302 DIN 315 DIN 316 DIN 404 DIN 417 DIN 427 DIN 431 DIN 432 DIN 433 DIN 434 DIN 435 DIN 436 DIN 438 DIN 439 A/B DIN 440 DIN 442 DIN 443 DIN 444 DIN 462 DIN 463 DIN 464 DIN 466 DIN 467 DIN 470 DIN 471 DIN 472 DIN 478 DIN 479 DIN 480 DIN 508 DIN 525 DIN 529C DIN 546 DIN 547 DIN 548 DIN 551 DIN 553 DIN 555 DIN 557 DIN 558 DIN 561A DIN 561B DIN 562 DIN 564A DIN 564B DIN 571 DIN 580 DIN 582 DIN 601 DIN 603 DIN 604 DIN 605 DIN 607 DIN 608 DIN 609 DIN 610 DIN 653 DIN 660 DIN 661 DIN 662 DIN 703 DIN 705 DIN 835 DIN 906 DIN 907 DIN 908 DIN 909 DIN 910 DIN 911 DIN 912 DIN 913 DIN 914 DIN 915 DIN 916 DIN 917 DIN 921 DIN 923 DIN 928 DIN 929 DIN 931 DIN 933 DIN 934 DIN 935 DIN 936 DIN 937 DIN 938 DIN 939 DIN 960 DIN 961 DIN 963 DIN 964 DIN 965 DIN 966 DIN 975 DIN 979 DIN 980V DIN 980 DIN 981 DIN 982 DIN 985 DIN 986 DIN 988 DIN 1440 DIN 1441 DIN 1443 DIN 1444 DIN 1445 DIN 1470 DIN 1471 DIN 1472 DIN 1473 DIN 1474 DIN 1475 DIN 1476 DIN 1477 DIN 1478 DIN 1479 DIN 1480 DIN 1481 DIN 1587DIN 1804W DIN 1804H DIN 1816W DIN 1816H DIN 2093 DIN 6319 DIN 6325 DIN 6330B DIN 6331 DIN 6334 DIN 6340 DIN 6796 DIN 6797 A/J DIN 6798 A/J DIN 6799 DIN 6885 A/B DIN 6887 DIN 6888 DIN 6911 DIN 6912 DIN 6913 DIN 6914 DIN 6915 DIN 6916 DIN 6917 DIN 6918 DIN 7338 DIN 7343 DIN 7346 DIN 7349 DIN 6924 DIN 6925 DIN 7513 DIN 7514 DIN 7515 DIN 7516 DIN 7603 DIN 7604 DIN 7967 DIN 7968 DIN 7969 DIN 7971 DIN 7972 DIN 7973D IN 7976 DIN 7977 DIN 7978 DIN 7979D DIN 7980 DIN 7981 DIN 7982 DIN 7983 DIN 7984 DIN 7985 DIN 7989 DIN 7990 DIN 7991 DIN 7993 A/B DIN 9021DIN 11023DIN 11024DIN 22424 DIN 22425 DIN 28129 DIN 80705

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brass Rod Hex Pipe Bar

Deep recycling industries high quality brass rod, brass bar, and brass shapes in several different brass alloys
Brass rods (solid and hollow) are produced according to DIN 17660, 176172, 1756, 1761, 1763, 1782, 59752, BS 2874 EN 12164, 12165, 12168 and ASTM specifications

Copper -- the Metal We Can't Live Without

Coppper THE METAL WE CAN'T LIVE WITHOUT
Market Wire (press release) - USA
So how can copper help? Earlier this year, the US Environmental Protection Agency (EPA) approved the registration of 275 copper alloys as antimicrobial

neutral links terminal block

Manufacturer and supplier of brass components to custom specifications, Deep Recycling Industries manufactures electrical parts, lock parts, energy meter parts, precision-

turned parts, rivets, screw nut and bolts, switch parts, various type of anchors, pins, forged bolts, brass cable gland, brass sanitary parts to precision and international specifications. Manufacturer and Exporter of Fire Extinguisher, Cable Glands, Electrical Parts, Fasteners, Moulding Inserts, Brass Turned Parts, Smoking Parts, Surgical Parts, Agriculture

& Spray Parts, we work very closely with some of the leading consumers and suppliers of Brass Fittings of the world using our expertise to improve performance with innovative, value

added products. deep recycling industries Sanitary Parts, Fire Extinguisher, Cable Glands, E1w Cable Glands Bw Cable Glands,

Flange Type Cable Glands, Cw4 Cable Glands, Bw2 Part Cable Glands, Wiping Cable Glands, Electrical parts, Electrical Switch Parts, Fasteners, Moulding Inserts, Sanitary Parts,

Fasteners, Fasteners, Fasteners, Electrical parts, Fasteners. T Gas Fittings, Jet Elbow, Compression Union, Valve, Force Barb, Nozzle, Gas Fitting, Gas Fittings Plug, Force Barb - T, Single

Barb Elbow, Compressor Female Elbow, Compressor Male Brand -T Brass Terminal Block Brass neutral link : Manufacturer of neutral links and terminal blocks up to 1 metre length are

available. We also manufacture 4 way and 8 way brass neutral links and terminal blocks we also make terminal block in tin and nickle plated. We are manufacturing earth neutral bars in

sizes as per customer specification and We offer brass neutral links and terminal blocks for all types of panel board switch gears and electrical switch boards electrical wiring

accessories nut bolt anchor rivets all type of micro precision fasteners Multi Connector Terminals Blocks Brass Terminal Bars Terminals Blocks For Connectors Materials Include Ceramic and

Bakelite Spring Terminals Blocks PCB Terminal Bars Brass Neutral Bars Pin Terminals Spade Fork Terminals Crimp Terminals

din classification

Illustration    Item    Description
DIN 432     DIN 432     Tab Washer
DIN 433     DIN 433     Small O.D. Flat washer
DIN 434     DIN 434     Square beveled washer
DIN 436     DIN 436     Square washer
DIN 438     DIN 438     Slotted cup pt. set screw
DIN 439B     DIN 85A     Hex jam nut
DIN 440     DIN 440     Flat Washer
DIN 444A     DIN 444A     Eye bolt
DIN 444B     DIN 444B     Eye bolt
DIN 462     DIN 462     Internal tab washer
DIN 463     DIN 463     External tab washer
DIN 464     DIN 464     Knurled thumb screw
DIN 466     DIN 466     Knurled nut
DIN 467     DIN 467     Thin knurled nut
DIN 470     DIN 470     Sealing washer
DIN 471     DIN 471     External retaining ring
DIN 472     DIN 472     Internal retaining ring
DIN 529C     DIN 529C     Anchor Bolt
DIN 551     DIN 551     Slotted flat point set screw
DIN 553     DIN 553     Slotted cone point set screw
   
Illustration    Item    Description
DIN 553     DIN 553     Slotted cone point set screw
DIN 555     DIN 555     Thick hex nut
DIN 557     DIN 557     Flange Nut
DIN 561     DIN 561     Hex head set screw
DIN 562     DIN 562     Square nut
DIN 580     DIN 580     Stud type lifting eye
DIN 582     DIN 582     Tapped eye lifting eye
DIN 603     DIN 603     Carriage bolt
DIN 603Mu     DIN 603Mu     Carriage bolt w/nut
Type 610     Type 610     Ensat manual insertion tool
Type 620     Type 620     Ensat automatic insertion tool
DIN 653     DIN 653     Knurled thumb screw
DIN 705A     DIN 705A     Set collar
WN 791     WN 791     Ribbed lock washer
WN 792     WN 792     Ribbed lock washer
DIN 835Fo     DIN 835Fo     Double ended threaded stud
DIN 906     DIN 906     Socket pipe plug
DIN 908     DIN 908     Socket Pipe plug
DIN 910     DIN 910     Hex pipe plug
 
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--
Divyang A. Pandya

Neutral Bar Assembly

A system of components which can be grouped into sets for assembly in various configurations to provide electrical neutral bar assemblies of different shapes and having different numbers of neutral-wire-receiving openings. The system, which is particularly suitable for use with neutral wires of relatively large ampacity, includes a plurality of insulating bases, a plurality of neutral bars of different lengths, and an interconnecting plate. One or more of the bases and one or more of the neutral bars with or without the interconnecting plate are arranged to be secured together in different configurations by bolts.

Copper Enhances Communications

Copper and its alloys have played a critical role in electronics since the first electron tubes were created early in this century. In spite of the inevitable dominance of semiconductors, some $2 billion worth of tubes are still manufactured worldwide yearly, according to Edward J. Richardson, CEO of Richardson Electronics, Ltd., LaFox, Illinois, a major manufacturer and distributor of tubes.

Tubes still perform uniquely or better than semiconductors in several applications:

• Induction-heating and microwave ovens are still mostly powered by magnetrons made using copper alloys.
• Rectifier tubes made with copper alloys survive overloads better than semiconductor rectifiers.
• Most large TVs and desktop computer monitors still depend on cathode ray tube (CRT) displays, which use copper alloys in their electron guns and screen masks. Portable TVs and computers use various solid-state displays.
• Broadcasting, where some tubes are the size of jeroboams of champagne. Very-high and ultra high frequency communications still depend on tubes made of copper and its alloys.
• Since radar was invented in the late 1930's, it has been powered by klystrons and magnetrons largely made of copper alloys. Varian Associates, one of the major sources for such tubes, recently sold its tube business to Communications & Power Industries (CPI), also in Palo Alto, California.
• The VHF and UHF signals generated by the tubes are conducted to the antennas that broadcast them by hollow conduits called wave-guides and by couplers - both of which are often made of copper and its alloys.

"At high frequencies, copper is 30% to 40% more efficient than aluminum in wave-guides." That's according to G. Scott Ackland, manager of engineering services for Antek in Frederick, Maryland. Its wave-guides conduct the UHF frequency signals inside satellite earth stations. "We rarely use any material other than oxygen-free, high-conductivity (OFHC) copper. Sometimes we fabricated with bronze because that's what the military specifies," says Ackland. Besides its higher Antek because it's easier to fabricate. Kevlin Microwave Corporation also uses OFHC copper for the central conductor in radars, according to John Rice, sales manager for the Wilmington, Massachusetts-based manufacturer. The coupler is the component that conduits the signal from the fixed wave-guide to the rotating board or ground-based radar.

The vast majority of electron tubes are now made outside the U.S., mostly in the Far East. The inexpensive magnetrons that power microwave ovens are all made in South Korea, which is also a major source for CRTs used in TVs and desktop PCs.

Bronzes: Copper Alloys that Counter Friction

Cast and sintered bronzes perform an important anti-friction function in millions of American homes, automobiles and trucks, and in virtually all heavy industrial equipment. A familiar example is the common kitchen food processor. These machines use bronze bearings to smooth the motion of their whirling blades. (See photo at left.)

For centuries, bronzes have played a major role in combating friction. And bronze bearings continue to hold their own, in spite of long-time competition from ball, sleeve and roller bearings made of steel - and even those bearings may require bronze retainer rings.

Until early in the Industrial Revolution, bearings for vehicles and mechanical equipment were made of hardwoods. As more massive and faster-moving machinery was created, a stronger, longer-lasting bearing material was needed. Various bronze alloys were developed and are now used to make bearings in enormous variety for equipment from giant earth movers to kitchen blenders.

There are two basic ways to make bronze bearings: casting and sintering. Basic forms include: cylindrical sleeves or flanges; flat, donut-shaped thrust bearings; or disk-shaped bearing plates. Solid cast bearings are made from a variety of bronzes. For very demanding applications, William E. Austerberry, vice president of the National Bronze Mfg. Co., Detroit, recommends C95400, which contains 10% to 11.5% aluminum. This tough bronze has a tensile strength of 100,000 psi, nearly that of steel. It is also acid resistant. Although C95400 is very hard, hardened steel is slightly harder, so that the bronze is sacrificed, or worn, first. Parts that are either costly or difficult to replace are protected by these comparatively inexpensive bronze bearings which are expected to wear out over time and to be replaced periodically.

For less demanding applications, less costly C93200 is commonly specified. For applications involving high loads but low speeds, C90300, a tin bronze, referred to historically as Navy G, is recommended. "This strong material can stand repeated pounding," says Austerberry.

If corrosive salt water is present, then C92200, a medium-strength, free machining bronze that offers good brazing qualities, is the alloy of choice. Salt water will not corrode it. Where lubrication is doubtful, designers usually specify C93700, a general purpose bronze that offers low friction. It has good bearing qualities and can resist mildly corrosive acids, according to Austerberry.

C94500 is specified where lubrication may fail altogether; it contains 20% lead. Because it has a Brinell hardness of only 50, compared to 175 for high-strength C95400, it provides excellent conformity that corrects for minor misalignments.

Variety of Lubricants

Solid-cast bearings and bushings are often grooved by machining so can retain the lubricants needed at the surface bearing the load (See photo). The grooving varies depending on the shape of the bearing and the load conditions. Grooves are either circular, straight, looped, or in the shape of figure eights or double figure eights. The lubricants are either graphites pressed into the grooves under great pressure or mineral or petroleum-based oils flowing continuously. Graphite lubricants will usually last for the life of bearings.

When Sintered Is Superior

A variety of powders are compacted with bronze into sintered bearings, according to Dr. Vyacheslava Styskin, head metallurgist for the Wakefield Corporation, Wakefield, Massachusetts. There are even sintered bearings made entirely of iron. 'Although sintered iron bearings are stronger than all bronze bearings, the latter are superior for high-rotation-speed applications, such as in machine tools," according to Lee Sacks, general manager of Maryland Metrics, Baltimore. All the bearings from this vendor are made in metric rather than conventional sizes for manufacturers who export machinery or who use metric based machinery.

Sintered bearings don't require grooving because the lubricant is absorbed into the pores between the sintered groups of powder by vacuum impregnation or hours long immersion in hot oil. In general sintered bearings are used in lighter, shorter-product-life applications, such as desktop computer printers. Some sintered bearings are used dry in light-duty applications, according to Austerberry.

Lower-cost bimetal bearings with thin layers of bronze at the wearing surface are generally specified by cost-conscious engineers, such as those who design mass-produced items like auto engines, says Austerberry.

In Ball Bearings, Too

Low-friction ball and roller bearings with their many steel parts are more expensive than bronze bearings. Nevertheless, bronze plays an essential role in larger, heavy-duty ball or roller bearings; the retainer rings that hold the balls or rollers in position a-re made of bronze.

According to John Williamson, a salesperson with the Frank Tracy Company, New York, a major distributor of many brands of bearings, bronze is specified over steel for retainers because of its superior thermal characteristics in high heat environments.

National Bronze obtains its bronzes from a variety of sources, including Ampco, Bunting and Concast Metal Products. In addition to finished bearings, National Bronze also sells bar stock to a very small number of customers who make their own bearings.

High Strength Copper Alloys Boost Injection Molding

Higher production rates are making copper alloys, which transfer heat rapidly, the materials of choice for many injection and blow molds for plastics. In molding, there's a major economic advantage to rapid removal of heat from the molten plastic: it raises production rates and reduces part defects. This more than compensates for the slightly higher cost of copper alloys - a difference likely to add no more than five percent to the total cost of the mold tool.

Besides cutting costs, high thermal-conductivity copper alloys offer these advantages in molding:

• More uniform heating.
• In some instances, tight dimensional specifications in large, complicated plastic parts can be achieved only if the parts are made in copper-alloy molds.
• Improved esthetics because fewer "sink marks" and other defects are created. As a result, lower injection and pack pressures can be used, saving material.
• Large plastic parts cast in copper-alloy molds exhibit much less warping; the excessive warping associated with parts made in steel molds can make it difficult to assemble large parts into systems.

In molding, copper alloys are replacing the commonly used mold steels, such as Type 420 stainless steel, because they have thermal conductivity three to nine times higher. Yet, the alloys are hard enough to meet the wear requirements of manufacturers aiming for high production rates of injection molded parts.

For instance, "high hardness copper beryllium, C17200, has a Rockwell hardness of C41, approaching that of steels. Wear resistance is often associated with hardness in the toolmakers' mind. Copper alloy have been shown to provide hundreds of thousands of production cycles.

Because wear resistance is more of a surface hardness phenomenon, a number of coating systems provide hard surfaces which extend the life of copper alloy molds - giving the best of both worlds: excellent heat transfer and good wear resistance.

The copper alloys, which include the nickel-silicon chromium-hardened high strength, high-conductivity alloy, C18000, developed by Ampco Metals, are commonly used in the creation of very large components by injection molding.

A copper be beryllium alloy used to make the molds for injection molding of the polypropylene bumpers for Renault in France was supplied by Brush Wellman, according to sales manager J. Scott Smyers. A number of U.S. suppliers are producing and stocking the copper berylliums and the C18000 alloy in both rod and heavy plate forms.

Molds often include a core to shape the parts and to speed cooling. Cast C82500 copper beryllium is an option for these cores. Sometimes, copper cores are used with steel molds, according to Truman Moore, president of TriCast Corporation, Crystal Lake, Illinois, which fabricates copper-alloy molds and their parts by a liquid casting process.

An industry task force under the auspices of the Copper Development Association has been introducing this array of advantageous alloys to the plastics industry for the past two years at trade shows, technical symposiums and at manufacturing sites throughout the U.S.

Wedges, lifters and slides are other required parts for molds. They are often made of aluminum bronze alloys C61900 and C62500. Pins and cores are often fabricated from nickel-silicon-hardened alloy, C64700.

Forms of Copper

Copper is shipped to fabricators mainly as cathode, wire rod, billet, cake (slab), or ingot. Through extrusion, drawing, rolling, forging, melting, electrolysis, or atomization, fabricators can form wire, rod, tube, sheet, plate, strip, castings, powder, and other shapes. These copper and copper-alloys are then shipped to manufacturing plants that make products to meet society's needs.