Blow molding of hollow thermoplastic products from preforms using a closure frame with a central and two outer plates carrying molds with locking systems and a movement synchronizing mechanism

摘要

The closure frame(10) has a supporting plate(20) for one blow mold half(26a) and a drive plate connected to a second support plate(24) for another blow mold half(28a). A support plate(25) between the other two carries a tool half(26b,28b) on each side to form complete blow molds with the first and second parts and moves between open and closed positions. A locking system(30,32) is provided for each mold whose symmetric opening and closure is effected by a synchronizing mechanism(48). An Independent claim is made for the process equipment.