DEVICE FOR ACCURATELY OPENING AND CLOSING MOLD HALF BODY OF STRETCH BLOW MOLDING MACHINE FOR BLOW-MOLDING HOLLOW BODY MADE OF THERMOPLASTIC PLASTIC RAPIDLY

摘要

PURPOSE: To rapidly and very precisely close and open the mold halves in a stretch blow molding machine by connecting a four-link gear and a cam conductor. CONSTITUTION: The links to be driven 35 of a four-link gear comprise the support rotating points 36 and the connecting rod rotating points 37 opposite to the support rotating points 36. The link to be driven is rotatable around the support rotating point 36, and comprises the mold half 11 fixed thereto and a connecting rod 38, one side of the connecting rod is connected with the mold half 11, and the other side thereof is connected with the connecting rod rotating point 37. The opening motion and the closing motion of the mold halves 11, 12 are performed by the four-link gear connected with a cam driving device, and the remarkably short rotating travel is performed by directly mounting the support rotating point 36 on an end part of the mold joint between the mold halves 11, 12.