Color distribution
Description
Injection molded parts have inconsistent color, that is, there is bias differences, colored streaks or patches.
Preview
Causes
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Possible cause
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Recommendations to resolve
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Injection molding machine
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Pigments mixed in cylinder of injection moulding machine not inadequate.
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1.Increase the back pressure.
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2.Reduce the injection cylinder temperature of plastic for better mixing.
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Plastic
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1. Pigment not evenly covered with the plastic particles.
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lubricant used before injection mixed with plastic.
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2.Colorant particles are too thick.
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Polishing dyes to obtain the powder.
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3.Color masterbatch concentration level is too low.
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Use the correct concentration of colorant, color masterbatch or liquid stains.
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4.Liquid coloring agent, the ingredients are not unified.
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Check the send tubes for air jam, and check for slide screw.
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5.Amount of difference in plastic.
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Mixture of new material and material rendering to get rid of all "powder" and dust.
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