The mold(1) the diameter of the spray or spray stem Portal is too small. should expand the diameter(2) the surface of molds and cores are of poor quality. Check if the surface of the mold is broken(3) the arrangement of asymmetric molds crush caused shrinkage in some part at the bottom of the products layout of conduits should be placed symmetrically, or expand the size of some of the channel lead. (4) The water supply system layout uneven cooling and cooling less efficient review and modification of the water supply system Injection molding machine(1) the diameter of the barrel (barrels) is too small, leading to hard plastic pump internal diameter of the barrel head should be broad (2) Barrel Setup was unable to prevent and control the correct plastic check the gaskets and rings; replace if needed.
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