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注塑加工时温度应当怎样去节制

来历:beat365官网:http://es2c.com 日期:2021-04-08 宣布人:liqiang 阅读次数:
1、料筒温度:打针模塑进程须要节制的温度有料筒温度,喷嘴温度和模具温度等。前两种温度首要影响塑料的塑化和活动,尔后一种温度首要是影响塑料的活动和冷却。
1. Barrel temperature: the injection molding process needs to control the barrel temperature, nozzle temperature and mold temperature. The first two temperatures mainly affect the plasticization and flow of plastics, while the second one mainly affects the flow and cooling of plastics.
每种塑料都具备差别的活动温度,统一种塑料,因为来历或商标差别,其活动温度及分化温度是有差别的,这是因为均匀份子量和份子量散布差别而至,塑料在差别范例的打针机内的塑化进程也是差别的,因此挑选料筒温度也不不异。
Every kind of plastics has different flowing temperature. The flowing temperature and decomposition temperature of the same kind of plastics are different due to different sources or brands. This is due to different average molecular weight and molecular weight distribution. The plasticizing process of plastics in different types of injection machines is also different, so the barrel temperature is not the same.
2、喷嘴温度:喷嘴温度凡是是略低于料筒至低温度的,这是为了避免熔料在纵贯式喷嘴能够产生的"流涎景象"。喷嘴温度也不能太低,不然将会形成熔料的早凝而将喷嘴梗塞,或因为早凝料注入模腔而影响成品的机能。
2. Nozzle temperature: the nozzle temperature is usually slightly lower than the barrel to high temperature, which is to prevent the molten material from salivating in the straight through nozzle. The temperature of the nozzle should not be too low, otherwise it will cause the premature solidification of the melt and block the nozzle, or the performance of the product will be affected due to the injection of the premature solidification material into the mold cavity.
3、模具温度:模具温度对成品的内涵机能和表观品质影响很大。模具温度的凹凸决议于塑料结晶性的有没有、成品的尺寸与布局、机能请求,和别的工艺前提(熔料温度、打针速率及打针压力、模塑周期等)。
3. Mold temperature: mold temperature has a great influence on the internal performance and apparent quality of products. The mold temperature depends on the crystallinity of the plastic, the size and structure of the product, the performance requirements, and other process conditions (melt temperature, injection speed and pressure, molding cycle, etc.).

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