注射模具外文翻譯---注射模具的介紹-模具設(shè)計(jì)-閱讀頁
2025-02-08 03:51本頁面
【正文】 he special instruments which installed in the press,it produces the required shape parts or products through pressure on the metal or nonmetallic materials, this special instruments collectively call as the mold. Mold general classification Mold can be divided into plastic and non plastic mould: (1) Nonplastic mould: Die Casting, fing Die, Die, diecasting mould and so on. A. Die Casting taps, pig iron platformB. Fing Die car body C. Die puter panel D. Die Casting Die superalloy, cylinder body (2) For the production technology and production, the plastic mold are divided into different products: A. Injection molding die TV casing, keyboard button (the most mon application) B. Inflatable module drink bottles C. Compression molding die bakelite switches, scientific Ciwan dish D. Transfer molding die IC products E. Extrusion die of glue, plastic bags F. Hot forming die transparent shell molding packaging G. Rotomoulding mode Flexible toy doll. Injection Molding is the most popurlar method in plastics producing process. The method can be applied to all parts of thermoplastic and some of thermosetting plastics, the quantity of plastic production is much more than any other 6 forming mold as one of the main toolsof injection molding processing,whosh production efficiency is low or high in the quality of precision 、manufacturing cycle and the process of injection molding and so on,directly affect the quality of products, production, cost and product updates, at the same time it also determines the petitiveness of enterprises in the market39。otherwise,the product could be is even a danger that the plastic could squirt out of the mold and do personal danger. Runners and Gates Now,we must add provisions for bringing the plastic into these cavity must 9 be done with enough pressure so that the cavity spaces are filled pletely before the plastic freezes(that is,cools so much that the plastic cannot flow anymore).The flow passages are the sprue,from wherethe machine nozzle contactss the mold,the runners,which distribute the plastic to the individual cavities, the wall of the runner channel must be smooth to prevent any restriction to flow. Also, as the runner has to be removed with the molding, there must be no machine marks left which would tend to retain the runner in the mould the gates which are small openings leading from the runner into the cavity space. The gate is a channel or orifice connecting the runner with the impression. It has a small crosssectional area when pared with the rest of the feed system. The gate freezes soon after the impression is filled so that the injection plunger can be withdrawn without the probability of void being created in the molding by suckback. 4. The injection molding machine process Injection Mold is installed in the injection molding machine, and its injection molding process is pleted by the injection molding machine. Following is the injection molding machine molding machine uses a vacuum to move the plastic from the dryer to it39。 The barrel is where all the real work is done and it39。s molten can it be injected into the mold with a rapid turn of the screw. As the chamber in front of the screw bees filled, it forces the screw back, tripping a limit switch that activates a hydraulic cylinder that forces the screw forward and injects the fluid plastic into the closed mold. The gate freezes soon after the impression is filled so that the injection plunger can be withdrawn without the probability of void being created in the molding by suckback. The tip of the barrel is called the nozzle and from this point to the cavity in the mold the material is not heated and is constantly cooling. The runner is the cooled/set plastic that extends from the nozzle to the cavity and is process scrap. Actually, the cooled material from the nozzle to the mold is the sprue but it39。s beyond the scope of what we3
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