GAS-ASSISTED INJECTION MOLDING OF THERMOSETTING POLYMERS

摘要

Thermosetting polymer (6) is introduced into a mold (1) at one end thereof t o fill said mold (1, 5). After a predetermined length of time to permit the thermosetting polymer (6) to polymerize along the wall of the mold (1) to fo rm a wall of the desired thickness, gas is introduced into said mold (1) at the opposite end (7) to eject the central unpolymerized portion of the thermosetting polymer (6) from the mold (1), leaving behind in the mold a hollow formed article.