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Title:
METHOD OF MOLDING METAL BELLOWS TUBE PROVIDED WITH LIQUID QUANTITY ADJUSTMENT MECHANISM, AND MOLDING DEVICE FOR SAME
Document Type and Number:
WIPO Patent Application WO/2018/026022
Kind Code:
A1
Abstract:
[Problem] In hydraulic forming of bellows, to prevent an increase in the size and complexity of a device using a simple construction, and to make it possible to reduce the quantity of water and reduce power consumption. [Solution] Two ends of a hollow starting material pipe (P) are hermetically sealed by means of a fixed die (12) and a movable die to form a space (S) in a hollow portion of the starting material pipe (P). A divided die (14) is disposed on the outer periphery of the starting material pipe (P) in order to mold the bellows, and a core (17) of a liquid quantity adjustment mechanism (15) is inserted into the space (S) in the starting material pipe (P) with freedom to move forward or backward, to form a space that is different after the core (17) has been inserted compared with the space before the core (17) has been inserted, and bellows molding liquid (W) is introduced via a liquid feed hole (17a) in the core (17) into the sealed space (S1) having the smaller volume after said insertion.

Inventors:
SASAKI Isamu (2-26-10, AzusawaItabashi-k, Tokyo 51, 〒1740051, JP)
SUZUKI Satoshi (LTD. UKIMAFACTORY 5-3-3Ukima,Kita-k, Tokyo 51, 〒1150051, JP)
Application Number:
JP2017/028503
Publication Date:
February 08, 2018
Filing Date:
August 04, 2017
Export Citation:
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Assignee:
SHOWA RASENKAN SEISAKUSHO CO.,LTD. (2-26-0, AzusawaItabashi-k, Tokyo 51, 〒1740051, JP)
International Classes:
B21D15/10; B21D26/033
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