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济南注塑加工之温度控制

来源:http://www.sdlqmj.com 日期:2020-06-19 发布人:liqiang 浏览次数:
 济南注塑加工根据用户的需求,将热融化的材料由高压射入模腔,经冷却固化后得到某些形状复杂的部件,注塑加工是经常用到的部件加工方法。下面,注塑加工厂为您介绍一下注塑加工过程中的温度控制:
According to the user's demand, injection molding plant injects the hot melt material into the mold cavity by high pressure, and then gets some parts with complex shapes after cooling and solidification. Injection molding is a frequently used part processing method. Next, the injection molding plant will introduce the temperature control during the injection molding process:
1、料筒温度:注射模塑过程需要控制的温度有料筒温度,喷嘴温度和模具温度等。前两种温度主要影响塑料的塑化和流动,而后一种温度主要是影响塑料的流动和冷却。每一种塑料都具有不同的流动温度,同一种塑料,由于来源或牌号不同,其流动温度及分解温度是有差别的,这是由于平均分子量和分子量分布不同所致,塑料在不同类型的注射机内的塑化过程也是不同的,因而选择料筒温度也不相同。
1. Barrel temperature: the temperature to be controlled in the injection molding process includes barrel temperature, nozzle temperature and mold temperature, etc. The first two temperatures mainly affect the plasticization and flow of plastics, while the second one mainly affects the flow and cooling of plastics. Each kind of plastic has different flow temperature. For the same kind of plastic, the flow temperature and decomposition temperature are different due to different sources or brands. This is due to different average molecular weight and molecular weight distribution. The plasticization process of plastic in different types of injection machines is also different, so the selection of barrel temperature is also different.
2、喷嘴温度:喷嘴温度通常是略低于料筒温度的,这是为了防止熔料在直通式喷嘴可能发生的"流涎现象".喷嘴温度也不能过低,否则将会造成熔料的早凝而将喷嘴堵塞,或者由于早凝料注入模腔而影响制品的性能。
2. Nozzle temperature: the nozzle temperature is usually slightly lower than the maximum temperature of the barrel, which is to prevent the possible "salivation" of the molten material in the through nozzle. The nozzle temperature should not be too low, otherwise it will cause the early setting of the molten material and block the nozzle, or the performance of the product will be affected due to the early setting material injected into the mold cavity.
3、模具温度:模具温度对制品的内在性能和表观质量影响很大。模具温度的高低决定于塑料结晶性的有无、制品的尺寸与结构、性能要求,以及其它工艺条件(熔料温度、注射速度及注射压力、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, performance requirements, and other process conditions (melt temperature, injection speed, injection pressure, molding cycle, etc.).

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