May 21, 2020

Why so many pockmarks on light-colored PVC parts are stored for several days

Sometimes it is found that after a few days of injection molding, white and other light-colored PVC parts will find many small pits on the surface and have to be scrapped. The reason is related to the order of injection molding production.

When producing dark parts such as black or blue, due to hot air baking ingredients, many colors and dust will float in the air around the oven. If white PVC plastic parts are produced within the range where the dust is flying, the colored dust will fall on the white PVC parts, but the dust cannot be seen with the naked eye.

After a few days, the toner diffused and the range of pollution gradually increased, and it slowly turned into blue or black pits that could be seen clearly, and the injection molded parts had to be beaten.

Therefore, when producing light-colored PVC parts such as white, there must not be dark parts such as black or blue in production nearby.

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Injection Molding, Plastic Mold Case, Plastic Molding Design, Plastic Parts
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