Patent ID: 7740185
Filing Date: 2010-06-22
Classification: B01F,B41F

Abstract:
1. A method for controlling a temperature of a component of a printing press including the steps of: providing said component of a printing press as one of a printing press roll and a printing press cylinder; providing a fluid flow path for said printing press component whose temperature is to be controlled, said fluid flow path including a fluid inflow path to a fluid inlet to said printing press component and a fluid return path from a fluid outlet of said printing press component; providing a pump in said fluid flow path; providing a temperature regulating fluid in said fluid flow path; providing said temperature regulating fluid as a liquid; providing a feed-in point connected to said temperature regulating fluid in said fluid inflow path; providing a temperature control source for said temperature regulating fluid and connecting said temperature control source to said feed-in point; locating said feed-in point remote from said fluid inlet to said printing press component whose temperature is to be controlled; conducting said temperature regulating fluid to said printing press component along said fluid inflow path from said feed-in point; determining a first measured value of a temperature of said temperature regulating fluid at a first temperature measuring point; locating said first temperature measuring point in said fluid inflow path remote from said fluid inlet to said printing press component; determining a second measured value of said temperature of said temperature regulating fluid at a second temperature measuring point; locating said second temperature measuring point in said fluid inflow path adjacent said fluid inlet to said printing press component; locating said first temperature measuring point and said second temperature measuring point spaced apart from each other on said fluid inflow path; providing a temperature regulating fluid control device; providing an actuating member in said fluid flow path adjacent said feed-in point; providing a first, inner control loop in said temperature regulating fluid control device; providing a second, outer control loop in said temperature regulating fluid control device; connecting said first, inner control loop and said second, outer control loop in a cascade-like manner; connecting said temperature regulating fluid control device to said actuating member; supplying said first measured temperature of said temperature regulating fluid to said inner control loop; supplying said second measured temperature of said temperature regulating fluid to said outer control loop; providing a pre-regulation unit and supplying a running time constant of a running time of said temperature regulating fluid in said fluid flow path to said outer control loop; forming an outer loop corrected command value in said outer control loop using said running time constant and said second measured value of said temperature control fluid at said second temperature measuring point; supplying said outer loop corrected command value from said outer control loop to said inner control loop; forming an inner loop corrected command value in said inner control loop using said outer loop corrected command value and said first measured value of said temperature control fluid at said first temperature measuring point; providing said inner loop corrected command value formed in said temperature regulating fluid control device to said actuating member; and using said temperature regulating fluid control device for operating said actuating member and controlling said temperature control source for controlling a temperature of said temperature regulating fluid in said fluid flow path.