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What is the cause of whitening of injection molded products?


1. Force during demolding (poor demolding)

2. Excessive load

3. Due to the poor demoulding of the injection-molded product, the release pin exerts too much force on the injection-molded product to cause whitening.

4. The whitened injection-molded product will crack as long as a little force is added.

Automobile mold manufacturing

Two: whitening solution:

1. Reduce injection pressure

2. Improve the finish of the injection mold cavity.

3. The product must have a sufficient demoulding slope, and the demoulding pins should be arranged in a balanced manner.

Three: Due to the difference of materials:

1. ABS is prone to whitening.

2. Plastic materials with poor fluidity are prone to defects such as fusion marks during the injection molding process.

Four: matters needing attention

1. Pay attention to the whitening phenomenon of the product in the post-processing of ABS plastic.

2. The weld marks of injection molded products are easy to separate due to the release agent, so they must be avoided.

3. The places where there are welding marks are prone to breakage and other phenomena.

4. If you want to distinguish fusion marks and cracks, you only need to apply ink on the product to distinguish them quickly.

5. Defects such as flash are prone to appear in the place of the fusion mark. But dents are rarely produced.