注塑产品注射时不稳定.经常打几模好产品打几模缺料的什么原因啊,该解决请教下大大门

2025-04-06 14:02:50
推荐回答(4个)
回答1:

你好!出现这种现象一般是机器方面的原因:
1)从工艺方面看的话,你的残料粮太大,一般为3--9个为好。
2)之前是生产什么原料,有没有可能螺杆没有清理干净。或者是下料口架桥。
3)是不是模具交口套的进胶口磨损变小。
4)射嘴与射嘴上的加热圈不匹配,(1,加长射嘴用普通宽度的加热圈。2,加热圈加热功率不够。3,电热偶的位置没有安装在射嘴上。等)可以把温度升高至260度试一下缩短周期或用射台储料后后退试一下看有无改善。这种判断是防止射嘴与模具接触点温度底(模具导热)被显示温度误导。
5)射嘴堵(有时看射料是无法判断的)同时检查螺杆四见套。
一般遇到这种问题你需要去观察机器的一些参数例如:残料是否固定,注射时间是否固定,机器的炮筒温度是否稳定(特别是射嘴的那一段),计量时间是否稳定,背压设定是否合理,注射时每模的曲线有无明显变化(注射曲线图),检查水口上是否有冷料现象出现(是否固定),后抽位置是否过小(有无流延),
我判断可能是4。5两种内的远因要大一点。希望可以帮助你。

回答2:

1是温度炮筒设定的温度过低,成型周期比较快,在注塑时后端的胶料塑化不及时。从而使供料不稳定。另外检查一下热电偶或发热圈等加热系统是否有故障造成料筒的实际温度过低。
2是机器塑化量不足, 应选用塑化量与加热功率大的机台;

回答3:

1料筒温度低或射嘴温度低导致有冷胶 2模具局部温度不一致 3检查螺杆三件套是否坏了或磨损

回答4:

请检查止退环

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