Heated die for hot forming

Metal deforming – With temperature modification of tool or of specified... – Of tool

Reexamination Certificate

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Details

C072S342920, C072S364000, C072S709000, C076S107100

Reexamination Certificate

active

10960484

ABSTRACT:
A hot forming tool is heated with multiple electrical resistance cartridge heaters. The heaters are located in the body of the tool so as to maintain the entire forming surface within a predetermined temperature range. Numerical thermal and optimization analyses direct the placement of the heaters so that when each heating element is simultaneously powered on for an identical fraction of the time, an acceptable temperature distribution will be produced within the tool at the tool operating temperature.

REFERENCES:
patent: 3528276 (1970-09-01), Hedstrom et al.
patent: 3926029 (1975-12-01), Abson et al.
patent: 4888973 (1989-12-01), Comley
patent: 5277045 (1994-01-01), Mahoney et al.
patent: 6272894 (2001-08-01), Hudson et al.
patent: 6810709 (2004-11-01), Hammar et al.
patent: 6884966 (2005-04-01), Coleman et al.
European Search Report dated Mar. 30, 2006 for corresponding EP 05 02 0585 application.

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