CO-INJECTION COMPRISING A CORE-SHAFT BUSH MADE OF SELF-LUBRICATING PLASTIC

摘要

PURPOSE: A co-injection molding including a self-lubricating plastic bush is provided to improve the workability and reduce the amount of lubricating oil used for the bush. CONSTITUTION: A co-injection molding comprises a core rotating shaft(35) and a bush(37). The core rotating shaft makes the first molded object meet the second cavity(15). The bush is made of the self-lubricating plastic covering the outer circumference of the core rotating shaft. The self-lubricating plastic is polyamide resin or monomer cast nylon.