Complete solution to the causes of the hottest inj

2022-08-13
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Complete solution to the causes of injection molding defects

twenty one of injection molding defects: Top White

ejector marks

the surface pressure here will be very high if the necessary demoulding force is too high or the surface of the ejector rod is relatively small, Deformation eventually causes the ejection part to turn white

the reasons and improvement measures related to processing parameters and cannot be naturally degraded are shown in the following table:

1. The pressure holding time is too high to reduce the pressure holding

2. The pressure holding time is too long to shorten the pressure holding time

<(or gap) to be large p>3. The pressure holding time is switched too late to advance the pressure holding switch, especially for the impact of small scale range

4. The cooling time is too short to extend the cooling time

the reasons and improvement measures related to design are shown in the following table:

1 The demoulding slope is not enough. Select the demoulding slope according to the specification

2. The surface in the demoulding direction is rough. Polish the mold in the demoulding direction

3. Form a vacuum core built-in air valve on the ejection side

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