Determine an unqualified plastic mold (3)

To determine a mold, except to inspect plastic parts, sometimes assemble them and use in the reality .

• There are not glossy, have cold plastic, hard spots, pits on the part surfaces

• Appear flash and shrinkage on the part at same time, or appear shrinkage and eject white mark at same time, and not easy to improve

• There are drag mark, flash, shortage, drag white mark etc. at the side of page

• The thickness of part is not even, too big or too thin. ( too big is easy to shrinkage, too thin is easy to be broken and difficult to fill for the melt resin)

• The part structure, part dimension, precision don't match the drawing requirements, there are obvious gap or misplacement when assemble parts

• Internal stress is big, easy to be deformation and stress crack