JOINT BOOT PRODUCING METHOD AND HEATING DEVICE USING THIS METHOD

摘要

A method of producing joint boots in such a manner as to mold a bellows section with uniform thickness, comprising the steps of forming a cylindrical parison (15) from molding material, the parison comprising a first portion (12) corresponding to a larger diameter-side attaching section (2), a second portion (13) corresponding to a smaller diameter-side attaching section (4), and a third portion (14) connecting the two portions (12, 13), heating only the third portion (14) of the first, second, and third portions to a set temperature by a heating device (B), thereafter covering the third portion with an outer mold (51), blowing gas to the inner peripheral surface of the third portion, and pressing the third portion against the outer mold to mold a bellows section (5).