DESCRIPTION:
The black mark at the end of the flow (the air is retained), the V-shaped marks, different colored lines, especially when using inorganic colors, the welding line (weldline) appear as gray lines . Easy to see in the dark or products in glossy surfaces
CAUSE:
Can designed to take the road to the location weldline invisible and non-structural (improving the flow and limit the flow), check design, if necessary, expand stem injection, avoid changing product thickness and fill the mold suddenly heterogeneous? Design entrance path plastic case met ly.Cac flow
Influence of color, the weldline location often affects the mechanical properties
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