METHOD AND DEVICE FOR MANUFACTURING VULCANIZATION BLADDER

摘要

PURPOSE: To provide a method for manufacturing a vulcanizing bladder of a low cost having the same accuracy as that of an injection mold. CONSTITUTION: The method for manufacturing a vulcanizing bladder 2 comprises the steps of forming an external injection chamber 34 for constituting an internal chamber 7 and a variable volume chamber of an injection cylinder 59 communicating with the chamber 7 by a first half mold 4, a second half mold 5 and an inner core 6 in a vulcanizing mold 3, supplying a mass of a heated uncured rubber 35 to an external chamber 34, injecting the rubber in the chamber 7 when the mold 3 is closed, and drawing it from the mold 3 by opening the chamber 7 and drawing it form the core 6 upon vulcanizing.