Patent ID: 11931926
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A jig that is inserted into a hollow portion, which is surrounded by an inner peripheral surface of a tubular portion of a material to be molded and is formed in one direction, the jig comprising:
a plurality of mold portions that each have a contact surface having a shape corresponding to the inner peripheral surface and are arranged in parallel in a direction intersecting the one direction;
a bladder that is provided on an opposite side to the contact surfaces of the mold portions with respect to the mold portions, is capable of accommodating a fluid therein, and is capable of expanding and contracting according to a pressure of the accommodated fluid;
a connecting portion that connects the plurality of mold portions and the bladder to each other; and
a connection portion that connects, among the plurality of mold portions, a mold portion on one side and a mold portion on the other side adjacent to the mold portion on the one side to each other and regulates an interval between the mold portion on the one side and the mold portion on the other side in the direction intersecting the one direction within a predetermined range.