Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Measuring a weight or volume
Patent
1983-11-28
1986-10-07
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Measuring a weight or volume
264 406, 264 51, 425 4R, 425144, 425145, 425149, B29C 6722, B29C 6704, C08J 922
Patent
active
046158499
ABSTRACT:
A method of molding foaming plastics in consecutive process cycles. The method includes directing foaming plastics to molding means for molding and sintering. The molding means are appropriate to form different molded items. The molding means communicates via an installation means with a supplying means. The supplying means serves to supply under the control of a control means, steam for heating, cold water for cooling, vacuum for providing suction and compressed air as needed to the molding means. The molding means has at least one pressure sensor means and/or temperature sensor means. The pressure sensor means and/or the temperature sensor means are connected to the control means. The control means continuously compares the pressure values sensed by the pressure sensor means and/or the temperature values sensed by the temperature sensor means during each process cycle with associated given pressure values and temperature values stored in the control means and based on said comparison the control means releases appropriate control signals to the supply means. The control means has storage means for storing values of control signals of earlier process cycles. The control means compares said values of earlier process cycles. The control means further comprises a storage for resulting cycle time lengths of the control signals of earlier process steps being restored process cycle by process cycle and the control means compares the last resulting lengths of the control signals to earlier cycle time lengths of the corresponding control signals and sets the related given stored values in the direction of decreasing the total process cycle time for the next cycle thereby watching given upper and lower limits of the given values and the given time limits for the control signal lengths.
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Anderson Philip
Sodemape Holding AG
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