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Patent Searching and Data


Title:
MANUFACTURE OF MULTI-STAGE HEADER AND WORK
Document Type and Number:
Japanese Patent JP2000301274
Kind Code:
A
Abstract:

To dispense with a pipe for extrusion which is slidably and freely inserted into a pin to extrude a work from a die.

In this forming method, when a head part of a work 1 is formed by a punch 13 in a forming unit of a first stage, a pin 14 is advanced to extrude the work 1 from a die 12, and the extruded work 1 is locked to a groove in a movable member 21 of a locking means. Then, the work 1 is chucked by chucking claws 31, 32, the pin 14 is retracted inside the die 12 to separate the work 1 from the pin 14. Then, the work 1 is transferred to a next forming unit by the chucking claws 31, 32. Since the work 1 is extruded from the die 12 by advancing the pin 14 and projecting it from the die 12, a pipe for extruding the work which has been necessary in a conventional practice can be dispensed with.


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Inventors:
Kawashima, Tokuo
Application Number:
JP1999000106604
Publication Date:
October 31, 2000
Filing Date:
April 14, 1999
Export Citation:
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Assignee:
NAKASHIMADA TEKKOSHO:KK
International Classes:
B21G3/28; B21J5/08; B21K27/00; B21G3/00; B21J5/06; B21K27/00; (IPC1-7): B21G3/28; B21J5/08; B21K27/00