Black spots refer to dark or striped black spots on the surface of the product, usually appearing near the gate along the flow direction. This defect is a surface quality problem and is common in the injection molding process. The following is an analysis and elimination method for black spot defects. Analysis and elimination method […]
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Silver streaks refer to splash marks formed on the surface of plastic parts, usually caused by the volatilization of air and moisture in the plastic, or the decomposition and burning of foreign plastics after mixing. These marks usually radiate outward from the gate in a fan-shaped manner. Many plastics absorb moisture during storage. If they […]
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