注塑模和注塑机(英文翻译）.rar

The Injection molding
Injection molding is principally used for the production of the thermoplastic parts, although some progress has been made in developing a method for injection molding some thermosetting materials. The problem of injecting a melted plastic into a mold cavity from a reservoir of melted material has been extremely difficult to solve for thermosetting plastics which cure and harden under such conditions within a few minutes. The principle of injection molding is quite similar to that of die-casting. The process consists of feeding a plastic compound in powdered or granular form from a hopper through metering and melting stages and then injecting it into a moldy. After a brief cooling period, the mold is opened and the solidified part ejected. Injection-molding machines can be arranged fur manual operation, automatic single-cycle operation, and full automatic operation. The advantage of injection molding are:
注塑模
尽笯@尚湍承┤裙绦运芰系姆椒ㄈ〉昧艘欢ń剑⑺苣＞咧饕故怯美瓷人苄运芗Ｕ庵饕且蛭裙绦运芰先厶逶诤芏痰氖奔淠诰突峁袒陀不诖恿隙废蚰＞咝颓蛔⑷肴裙绦运芰先厶宓墓讨校不岢鱿终庵智榭觯飧鑫侍庖恢狈浅Ｄ呀饩觥Ｗ⑺@@尚驮砗椭焓窒嗨啤Ｗ⑺@@尚偷墓ひ展贪ǎ菏紫劝蚜隙分械姆圩椿蛄Ｗ吹乃芰匣旌衔镆来问渌偷搅巳萘壳腿刍缓笤僮⑸涞侥＞咝颓恢校淌奔淅淙春蟪尚退芗Ｗ⑺芑治侄胱远叭远僮鳌Ｗ⑺苣＞哂幸韵掠诺悖裹br> （1）较高的成型速度使大批量生产成为可能；
（2）为成型具有不同使用性能的热塑性塑料提供了较宽的选择；
（3）可以成型带有螺纹的塑件、侧向凹陷的塑件、带侧孔的塑件以及较大的薄壁件。