Analysis of the causes of swelling and bubbling of injection molded products Some plastic parts are swollen or bubbling on the back of the metal insert or in a particularly thick part after the mold is released. This is because the plastic that is not completely cooled and hardened is caused by the release of gas under the action of the pulsation.
solution:
1. Effective cooling. Reduce the mold temperature, extend the mold opening time, and reduce the drying and processing temperature of the material.
2. Reduce the filling speed, reduce the forming cycle and reduce the flow resistance.
3. Increase holding pressure and time.
4. Improve the condition that the wall of the part is too thick or the thickness changes greatly.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
solution:
1. Effective cooling. Reduce the mold temperature, extend the mold opening time, and reduce the drying and processing temperature of the material.
2. Reduce the filling speed, reduce the forming cycle and reduce the flow resistance.
3. Increase holding pressure and time.
4. Improve the condition that the wall of the part is too thick or the thickness changes greatly.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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