Injection Molding Defects And Solutions -- Poor Transparency

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Injection Molding Defects and Solutions -- Poor Transparency 2025-10-20

Poor Transparency:
Due to poor contact between the molten material and the mold surface, tiny pits appear on the surface of the molded part, causing light scattering. Alternatively, the mold surface may not be sufficiently polished, resulting in decreased or uneven transparency in transparent products.

22.1 Causes	22.2 Solutions
22.1.1 Low mold temperature or low material temperature, causing poor contact between molten material and mold surface.	22.2.1 Increase mold and material temperatures to ensure full contact between the melt and mold surface.
22.1.2 Dull mold surface, oil, or moisture contamination.	22.2.2 Clean the mold surface to remove oil and moisture, or polish the mold surface.
22.1.3 Excessive or inappropriate mold release agent.	22.2.3 Use a suitable release agent or reduce the amount sprayed.
22.1.4 High material temperature or excessive shear in the gating system causing material decomposition.	22.2.4 Lower material temperature and injection speed to prevent material degradation.
22.1.5 High moisture content, impurities, black streaks, or silver streaks in the plastic.	22.2.5 Dry the material according to requirements and replace any nonconforming material.
22.1.6 Poor plasticizing.	22.2.6 Adjust processing conditions to ensure uniform plasticization.
22.1.7 Poor or uneven cooling of crystalline materials, or uneven wall thickness of molded parts.	22.2.7 Ensure uniform cooling for crystalline materials or modify the product design to make wall thickness as even as possible.
22.1.8 Hot runner temperature too high or too low.	22.2.8 Adjust the hot runner temperature.

Предыдущий :
Injection Molding Defects and Solutions -- Stains
Следующая :
Injection Molding Defects and Solutions -- Dull Surface

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