Gas assisted molding
1.Full shot method
Selective gas flow through the thick-walled area efficiently suppresses sink marks.
・Limited capacity of gas to be filled
・Difficult to spread the gas to the targeted area
2.Short shot method
・Thick-walled products can be molded due to the increased hollow ratio.
・Weight reduction compared to solid molding
・There is a limit to the amount of gas that can be filled.
・Cannot be applied to materials with low elongation
・Hedging occurs, so a pre-cavity (overflow) is necessary to discharge the material that will become the hollow part.