【正文】 可加工塑料的主要特點是兼?zhèn)淠静暮徒饘俚膬?yōu)良加工性能，制作工藝簡捷 (可采用模塑、澆注、拼粘、雕塑等方法 )、尺寸穩(wěn)定性好、不變 快速經(jīng)濟制模技術種類很多，其所具有的特點、應用范圍各不相同，本文僅能概括地做一些簡單介紹，每種技術在具體應用和實施過程中尚有許多具體的工藝過程、工藝參數(shù)及其技術特性。壽命可達到 525 7 模具毛坯的快速制造技術 — 實型鑄造 由于大量的模具是屬于單件或小批量生產(chǎn)，模具毛坯的制造質(zhì)量和周期及成本對最終的模具質(zhì)量和周期及成 現(xiàn)代模具毛坯已廣泛地采用子實型鑄造技術，所謂實型鑄造就是利用泡沫塑料制作代替?zhèn)鹘y(tǒng)的木模或金屬模，造型后不需取出模型，便可以澆鑄，泡沫塑料模型的高溫液 體金屬作用下，迅速燃燒氣化而消失，金屬液取代原來泡沫塑料模型所占有 8 其它方面技術造周期，在國內(nèi)外也先后出現(xiàn)了一些其它方面新技術的應用，如快換模架、沖壓單 氮氣彈簧在模具上的應用 氮氣彈簧是一種新型彈性功能部件，用它代替彈簧、橡膠、聚氨酯或者氣墊，它能夠準確地提供壓邊力，在較小空間便可產(chǎn)生較大初始彈壓力，不需預緊，在模具整個工作過程中彈壓力基本恒定。 3 澆鑄成型制模技術澆鑄出凸、凹模，型腔表面不需要機械加工。美國、日本、英國、以色列、德國、中國都推出了自己的商業(yè)化產(chǎn)品，并逐 漸形成了新型產(chǎn)業(yè)。, may suit each kind of black and the nonferrous metal thick sheet processing generally. The life may achieve 525 ten thousand, the production cost is low. 7 molds semifinished materials fast manufacture technology solid casting Because the massive molds are belong to the single unit or the production, the mold semifinished materials manufacture quality and the cycle and the cost to the final mold quality and cyclical and the cost influence are very important. The modern mold semifinished materials widely have used the seeds casting technology, the socalled solid casting is (polystyrene PS either polymethacrylate PMMA) manufactures using the foam plastics replaces traditional the wooden mold or the metal pattern, after the modelling does not have to take out the model, then may the casting, under the foam plastics model high temperature liquid metal function, deflagrate the gasification but to vanish, the molten metal substitution original foam plastics model holds the position, after the condensation forms the casting. 8 other aspects technologies in order to simplify the mold the structural design, reduces the mold cost, reduces the mold manufacture cycle, in domestic and foreign also successively appeared some other aspects new technology application, like trades the mold frame, the ramming unit, the cutting edge builtup welding quickly, inlays the block casting, the nitrogen spring and so on. nitrogen springs on mold application The nitrogen spring is one kind of new elastic function part, replaces the spring, the rubber, the polyurethane or the air cushion with it side, it can accurately provide presses the strength, then may have the greatly initial ball pressure in the small space, does not need pre tightly, is basically hit the pressure basically in the mold entire work process to be constant. The ball pressure size and the working point position may, accurate, conveniently adjust as necessary, simplifies the mold to stretch, nearby the pressure, exdenning isostructuralism, simplifies the mold design, reduces the pattern making cycle, debugs the mold to be convenient, reduces the replacement mold time, enhances the production 5 efficiency. fast trades the mold technology Because product variety increasing, causes the mold in the production the transmutation extremely frequently, how thereupon reduces the ramming equipment the down time, enhances the production efficiency, fast traded the mold technology to receive people39。s attention. At present developed industrial nation some big panies traded the mold speed to achieve astonishing degree, whether had fast trades the mold technology to bee for an enterprise technology advancement sign. The always tendency is reduces the mold to install on the equipment, to be fixed, the adjustment time, this both must give in the equipment structural design to consider, and must in the mold structural design, the standardized aspect consider, machine on work as far as possible placing machine under will do. ramming units bination technology The ramming unit bination technology is dies a resolve into each one simple unit the convention to die, according to the working procedure