System for controlling work temperature by a programmed controller

摘要

A temperature program pattern PP for desired change of surface temperature TC1 of a work 11 with time is set by a temperature setter 31. Work temperature-difference DELTA tpv between the surface temperature TC1 and inside temperature TC2 of the work 11 is determined by a difference detector 34. Set value of the above temperature-difference DELTA tsp is given by a difference setter 35 in the form of a difference pattern DP of its change with the above surface temperature TC1. For each actual surface temperature TC1, the work temperature-difference DELTA tpv is compared against its set value on the difference pattern DP by a comparator 36. A slope operator 37 responds to the output from the comparator 36 and modifies slope of the temperature program pattern PP so as to cause the work temperature-difference DELTA tpv to follow the difference pattern DP.