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温度对于精密注塑模具有哪些影响
08-21 / 2019

温度对于精密注塑模具的影响是非常大,可是很多人依旧不知道有哪些影响,下面小编来为大家简单介绍下。


1、变形

精密注塑模具温度稳定,冷却速度均衡可以减小制品的变形,对于壁厚不一致和形状杂乱的制品,常常会出现因缩短不均匀而发生变形的状况,因而必须选用合适的冷却系统,使模具与型芯的各个部位的温度根本坚持均匀,以便型腔里的塑料熔体能一起凝结。


2、尺度精度

使用温度调节系统坚持模具温度的稳定,能减少制品成型缩短率的波动,进步制品尺度精度的稳定性。在可能的状况下选用较低的模具温度能有利于减小制品的成型缩短率。例如对于结晶形塑料,由于模温较低,制品的结晶度低,较低的结晶度可以下降缩短率。可是结晶低不利于精密注塑模具产品尺度的稳定性,从尺度的稳定性出发,又需求适当进步模具温度,使产品均匀。


3、表面质量

精密注塑模具温度能改进制品表面质量,过低的模温会使产品概括不清晰并发生显着的熔合纹,导致产品表面粗糙。

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