模具注射成型毕业论文中英文对照资料外文翻译文献.pdfVIP

外 文 翻 译 模具注射成型 中英文对照资料外文翻译文献 Injection Molding The basic concept of injection molding revolves around the ability of a thermoplastic material to be softened by heat and to harden when cooled .In most operations ,granular material (theplastic resin) is fed into one end of the cylinder (usually through a feeding device know as a hopper ),heated, and softened(plasticized or plasticated),forced out the other end of the cylinder,while it is still i the form of a melt,through a nozzle into a relatively cool mold held closed under pressure.Here,the melt cools and hardens until fully set-up.The mold is the opened,the piece ejected,and the sequence repeated. Thus,the significant elements of a injectio molding machine become :1)the way in which the melt is plasticized (softened)and forced into the mold (calledthe injectio unit); 2)the system for opening the mold and closing it under pressure (called the clamping unit);3)the type of mold used;4)the machine controls. 外 文 翻 译 The part of an injection-molding machine,which converts a plastic material from a sold phase to homogeneous seni-liguid phase by raising its temperature .This unit maintains the material at a present temperature and force it through the injection unit nozzle into a mold .The plunger is a combination of the injection and plasticizing device in which a heating chamber is mounted between the plunger and mold. This chamber heats the plastic material by conduction .The plunger,on each storke; pushes unmelted plastic material into the chamber ,which in turn forces plastic melt at the front of the chamber out through the nozzle The part of an injection molding machine in which the mold is mounted,and which provides the motion and force to open an