各种常用成形工艺英汉对照峻峭
塑料成型
injection molding 射出成形 （注塑成型）extrusion molding 挤出成形 （挤出成型） calendaring molding 压延成形 （压延成型） hollow(blow) molding 中空(吹出)成形
matched mould thermal forming 对模热成形 compression molding 压缩成形 （压制成型） transfer molding 转送成形 （传递模塑成型）slush molding 凝塑成形 （搪塑）
rotational molding 离心成形 （滚塑）
全家福配文字经典句子
foam forming 发泡成形 （发泡成型）
dip mold 浸渍成形
海银集团encapsulation molding 注入成形 （封装成型）选题依据怎么写
matched die method 对模成形法
compound molding 复合成形
laminating method 被覆淋膜成形
唐朝的诗
rubber molding 橡胶成形
/tips/tips_process_methods.htm Plastic Processing Methods
PROCESS DESCRIPTION
Blow吹塑 An extruded parison tube of heated thermoplastic is positioned between two halves of an open split mold and expanded against the sides of the clod mold via air pressure. The mold is opened and the part ejected. Low tool and die costs, rapid production rates, and ability to mold fairly complex hollow shapes in one piece.
Calendering压延 Dough-consistent thermoplastic mass is formed into a sheet of uniform thickness by passing it through and over a ries of heated or cooled rolls. Calenders are also utilized to apply plastic covering to the backs of other materials. Low cost, and sheet materials are virtually free of molded-in stress.
Casting Liquid plastic, which is generally thermot except for acrylics, is poured into a mold without pressure, cured, and taken from the mold. Cast thermoplastic films are produced via building up the
material (either in solution or hot-melt form) against a highly polished supporting surface. Low mold cost, capability to form large parts with thick cross ctions, good
surface finish, and convenient for low-volume production.
Centrifugal casting离心浇铸 Reinforcement is placed in mold and is rotated. Resin distributed through pipe; impregnates reinforcement through centrifugal action. Utilized for round objects, particularly pipe
Coating被覆 Process methods vary. Both thermoplastics and thermots widely ud in coating of numerous materials. Roller coating similar to calendering process. Spread coating employs blade in front of roller to position resin on material. Coatings also applied via brushing, spraying, and dipping.
Cold pressure molding冷压力成型 Similar to compression molding in that material is charged into a split mold; it differs in that it employs no heat, only pressure. Part cure takes place in an oven in a parate operation. Some thermoplastic billets and sheet material are cold formed in a process similar to drop-hammer die forming or fast cold-form stamping of metals. Low-cost matched-tool moldings exist which utilize a rapid exotherm to cure moldings on a relatively rapid cycle. Plastic or concrete tooling can be ud. With process comes ability to form heavy or
炼药锅怎么用tough-to-mold materials; simple, inexpensive, and often has rapid production rate.
Compression molding模压成Principally polymerized thermot compounds, usually
pre-formed, is positioned in a heated mold cavity; the mold is
型 clod (heat and pressure are applied) and the material flows and fills the mold cavity. Heat completes polymerization and
the part is ejected. The process is sometimes ud for
thermoplastics. Little material waste is attainable; large, bulky
parts can be molded; process is adaptable to rapid
automation (racetrack techniques, etc.)
Encapsulation 封装成型 Mixed compound is poured into open molds to surround and envelope components; cure may be at room temperature with heated postcure. Encapsulation generally includes veral process such as potting, embedding and conformal coating.
Extrusion molding挤出成型 Widely ud for continuous production of film, sheet, tube, and other profiles; also ud in conjunction with blow molding. Thermoplastic or thermot molding compound is fed from a hopper to a screw and barrel where it is heated to plasticity then forwarded, usually via a rotating screw, through a nozzle posssing the desired cross ction. Production lines require input and takeoff equipment that can be complex. Low tool cost, numerous complex profile shapes possible, very rapid production rates, can apply coatings or jacketing to core materials (such as wire).
Filament Excellent
strength-to-weight. Continuous, reinforced
winding filaments, usually glass, in the form of roving are saturated with resin and machine-wound onto mandrels having shape of
三年级古诗词
desired finished part. Once winding is completed, part and
mandrel are cured; mandrel can then be removed through
porthole at end of wound part. High-strength reinforcements
can be oriented precily in direction where strength is
required. Good uniformity of resin distribution in finished part;
mainly circular objects such as pressure bottles, pipes, and科室会议照片
rocket cas.
Injection molding注塑成型 Very widely ud. High automation of manufacturing is standard practice. Thermoplastic or thermot is heated to plasticity in cylinder at controlled temperature, then forced under pressure through a nozzle into sprues, runners, gates, and cavities of mold. The resin undergoes solidification rapidly, the mold is opened, and the part ejected. High production runs, low labor costs, high repoducibility of complex details, and excellent surface finish.
Laminating 层合成型 Material, usually in form of reinforcing cloth, paper, foil, metal, wood, glass fiber, plastic, etc., preimpregnated or coated with thermot resin (sometimes a thermoplastic) is molded under pressure greater than 1000psi (7Mpa) into sheet, rod, tube or other simple shapes. Excellent dimensional stability of
finished product; very economical in large production of parts.
Matched-die- molding A variation of the conventional compression molding this process employs two metal molds posssing a clo-fitting, telescoping area to al in the plastic compound being molded and to allow trim of the reinforcement. The mat or preform reinforcement is positioned in the mold and the molds is clod and heated under pressures of 150-400 psi (1-3 Mpa). The mold is then opened and the part is removed.
Pultrusion This process is similar to profile extrusion, but it does not provide flexibility and uniformity of product control, and automation. Ud for continuous production of simple shapes (rods, tubes, and angles) principally incorporating fiberglass or other reinforcement. High output possible.
Rotational molding滚塑成型 A predetermined amount of powdered or liquid thermoplastic or thermot material is poured into mold; mold is clod, heated, and rotated in the axis of two planes until contents have fud to inner walls of mold; mold is then opened and part is removed. Low mold cost, large hollow parts in one piece can be produced, and molded parts are esntially isotropic in nature
Slush molding 搪塑Powdered or liquid thermoplastic material is poured into a mold to capacity; mold is clod and heated for a
