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how to solve the short shot problem in injection

Short shot is a problem that the cavity can not be completely filled up and the plastic product is defective.
The usual causes for short shot are:
1. the temperature of injection mould or plastic material is low
2. the venting problem
3. the melt material can not flow smoothly
4. the material is prematurely solidifyed
The solutions are as follows:
1. increase the injection pressure
2. increase the flowing speed
3. improve the temperature of feeding cylinder and injection mould
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