论文部分内容阅读
耐高温材料需要更高的成型和熔融温度,传统的注塑成型技术对这些材料已显得不够,除了选择大小合适的注塑机和模具之外,还要注意对材料的处理,如除湿处理——虽然水分吸收对成型制品的性能和尺寸稳定性影响较小,但是对成型工艺的影响非常明显。影响程度的大小主要取决于水分含量、树脂牌号以及特定的模具和制品。此外,还要控制热流道中的热量,控制好成型材料的结晶度。
High temperature materials require higher molding and melting temperatures. Conventional injection molding techniques are not adequate for these materials. In addition to selecting the right size injection molding machine and die, care should also be taken with material handling such as dehumidification - though Moisture absorption has little effect on the properties and dimensional stability of molded products, but the impact on the molding process is very obvious. The size of the impact depends mainly on the moisture content, resin grades and specific molds and products. In addition, the heat in the hot runner must also be controlled to control the crystallinity of the molding material.