Only the defects that affect the transparency of injection molded products are discussed here. For other defects, please refer to the company’s injection molded product manual or other materials. The defects may include the following items:
(1) Silver streak: Influenced by the internal stress anisotropy during the mold filling and condensation process, the stress generated in the vertical direction causes the resin to flow and oriented, and the non-flow orientation produces refractive index Different flashing silk patterns, when they expand, may cause cracks in the product. (2) Bubbles: The water vapor and other gases mainly in the resin cannot be discharged (during the mold condensation process) or due to insufficient mold filling, the condensation surface condenses too quickly to form a ’vacuum bubble’. (3) Poor surface gloss of injection molded products: Mainly due to the roughness of the mold, on the other hand, premature condensation makes the resin unable to copy the state of the mold surface, all of Chinese quality Plastic mould which make the surface produce small irregularities and make the product lose its luster .
(4) Shock lines: refers to the dense ripples formed from the sprue as the center. The reason is that the material at the front end has been condensed in the cavity due to the viscosity of the melt, and later the material breaks through the condensing surface, causing the surface to appear shock lines. (5) Whitening and haze: Mainly caused by dust falling into the raw materials in the air or the raw materials have too much water content. (6) White smoke and black spots: mainly due to the decomposition or deterioration of the resin in the barrel due to partial overheating of the plastic in the barrel.
(1) Silver streak: Influenced by the internal stress anisotropy during the mold filling and condensation process, the stress generated in the vertical direction causes the resin to flow and oriented, and the non-flow orientation produces refractive index Different flashing silk patterns, when they expand, may cause cracks in the product. (2) Bubbles: The water vapor and other gases mainly in the resin cannot be discharged (during the mold condensation process) or due to insufficient mold filling, the condensation surface condenses too quickly to form a ’vacuum bubble’. (3) Poor surface gloss of injection molded products: Mainly due to the roughness of the mold, on the other hand, premature condensation makes the resin unable to copy the state of the mold surface, all of Chinese quality Plastic mould which make the surface produce small irregularities and make the product lose its luster .
(4) Shock lines: refers to the dense ripples formed from the sprue as the center. The reason is that the material at the front end has been condensed in the cavity due to the viscosity of the melt, and later the material breaks through the condensing surface, causing the surface to appear shock lines. (5) Whitening and haze: Mainly caused by dust falling into the raw materials in the air or the raw materials have too much water content. (6) White smoke and black spots: mainly due to the decomposition or deterioration of the resin in the barrel due to partial overheating of the plastic in the barrel.
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