|

楼主 |
发表于 2009-4-14 09:32:22
|
显示全部楼层
注塑缺陷分析(英语)
BUBBLES (Voids)
Bubbles can be defined as a voided area trapped within a molded plastic part.
It differs from a blister in that there is no surface protrusion with a bubble.
Bubbles are usually caused by trapped gases or air pockets,
but can also be caused by differential shrinking.
MACHINE
LOW INJECTION PRESSURE OR HOLD TIME
Explanation: If injection pressure or hold time are too low, the molten material is not forced into the mold cavity and trapped gases and air will form voids because the gases will not be forced out of the mold through vent paths.
Solution: Increase the injection pressure and/or the hold time to help force the gases out as the plastic is pushed into the cavity. |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有帐号?注册
x
|