Malik D Tunador

42656087, May 5, 1981

Jun 30, 1980

6/164804

Malik Tunador - Pittsburgh PA
Manoj K. Wangu - Pittsburgh PA

Tunador Engineering, Inc. - Oakdale PA

B30B 300
B29C 306
B30B 1516

425149

The invention disclosed herein relates to an endless belt molding apparatus for the continuous molding of high pressure plastic foam products. The invention disclosed requires first and second adjustably spaced a part rotating endless belts between which the foamed product is molded. The space between the belts is vertically movable by means of fluid operated lifting/clamping means. The lifting/clamping means in cooperation with gauge blocks provide precise control of the space between the belts. Synchronized rotation of the belts is provided for any vertical positioning of the belts by a vertically extendable drive means rigidly coupled and mounted to said belts. A control circuit for the operation of the lifting/clamping means includes analogue sensing means positioned at selected locations between the first and second belts which provide signals representative of the pressures exerted by the foamed product during molding. The signals from the analogue sensing means are inputted to a control circuit for the fluid operated lifting/clamping means to adjust the spacing between on the speed of said belts in response to local variations in molding pressure.