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polypropylene injection molding Description
Nozzle temperature too high. Gate hasn't frozen off, no decompression of the screw, no sprue break, poor placement of the heater bands inside the tool.
Moisture in the material, usually when hygroscopic resins are dried improperly. Trapping of gas in "rib" areas due to excessive injection velocity in these areas. Material too hot, or is being sheared too much.
Lack of material, injection speed or pressure too low, mould too cold, lack of gas vents
Why Choose Julier
Welcome to wholesale the high quality polypropylene injection molding suppliers of bumper car parts made in China from our factory. As one of the leading manufacturers and suppliers in China, we are equipped with advanced equipment and technology. Please be free to get the customized products from us.