The color of
New Car injection molding parts is different from the single standard color sample when viewed with the naked eye, which is judged as color difference, under standard light source (D65); overflow (flash, flash): a thin layer of (flash) rubber appears along the parting line around the New Car injection molding parts or on the mold sealing surface, which is called overflow; size mismatch: during the molding process of New Car injection molding parts, the failure to maintain the original predetermined dimensional accuracy is called size mismatch.
Depression: The surface of
Fuel Car injection molding is uneven, smooth, and has shallow pits or dents inward; White top/high top: The surface of Fuel Car injection molding is obviously white or higher than the original plane; White spots: There are white particles in Fuel Car injection molding, which are also called "fish eyes" and are mostly reflected on transparent products; Insufficient strength (brittle cracking): The strength of Fuel Car injection molding is lower than expected, so that the plastic parts cannot withstand the predetermined load; Tiger skin pattern often appears on Fuel Car injection moldings with large areas such as bumpers, dashboards, door panels and pillars. It is a surface defect with wavy stripes. The stripes are approximately perpendicular to the melt flow direction, forming different gloss marks on the surface of Fuel Car injection moldings, which looks like the pattern on tiger skin, commonly known as tiger skin pattern. Tiger stripes are easily produced on New Car injection molded parts with thin walls and large flow rates. They have the following characteristics:
(1) Periodic alternating light and dark stripes appear on the surface of New Car injection molded parts;
(2) The stripes are roughly perpendicular to the flow direction of the melt;
(3) The stripes are divided into light areas and dark areas, with the light areas having high gloss and the dark areas having poor gloss;
(4) If the exterior surface of the New Car injection molded part is a bright area, the back surface is a dark area, and the two appear alternately.
