The ejection compressed formation manner null which uses the die, and its die for ejection compression formation of thermoplastics

摘要

PROBLEM TO BE SOLVED: To prevent compression effect from being decreased in injection molding followed by compression. ;SOLUTION: A pin gate 10 is provided at a center of a top force 7, further a fixing pin 14 is protruded at a central position of a recessed part 5 for forming a cavity formed in a bottom force 3. Molten resin is injected into the cavity from an injection opening 10 under a state wherein the die is slightly opened. Thereafter, the bottom force 3 is raised, and the injection opening of the pin gate 10 is blocked with a tip of the fixing pin 14. Besides, the resin in the cavity is compressed.;COPYRIGHT: (C)1997,JPO