Die unit and method of manufacturing die unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Feb 17, 2011
app pub date -
Jul 19, 2010
filing date -
Aug 17, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A die unit that maintains uniform quality of a work despite continuous operation is provided. The die unit includes a lower die holder including a base hole, an upper die holder including a through hole, a pillar having an end portion inserted to the base hole and the other end portion slidably inserted through the through hole, so as to allow the upper die holder to slide toward and away from the lower die holder, an annular bushing attached to the through hole so as to slide along the pillar, and a die element and a punch attached to one of the lower die holder and the upper die holder respectively. A spacer is provided at least one of between an inner circumferential surface of the through hole and the bushing, and between an inner circumferential surface of the base hole and the pillar, and the spacer has lower thermal conductivity than the upper die holder or the lower die holder on which the spacer is provided.
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