Cooling apparatus on a plastics injection molding machine

Details Cooling apparatus on a plastics injection molding machine Cooling apparatus on a plastics injection molding machine

1987-10-27

1988-09-06

Chambers, A. Michael

Fluid handling

Systems

With flow control means for branched passages

137883, 251367, F16K 308

Patent

active

047685590

ABSTRACT:
The flow rates in the cooling circuits of the apparatus can be controlled with the aid of a computer by means of ceramic turning valves. The computer is connected to the central computer of a plastic injection molding machine. The valve body disks, lying under constant pressure via ceramic sealing surfaces against valve seat disks, can be turned by means of pulse-controlled electric motors. Each fitting has a valve channel between the channel section of the supply channel and the channel section of the discharge channel which is covered by a valve seat disk and which forms a valve chamber. This achieves the effect that the deviations from the set temperature in the temperature-critical zones can be substantially reduced with acceptable technical expenditure. The temperature constancy achieved may be maintained for a virtually unlimited time without appreciable maintenance work.

REFERENCES:
patent: 1549758 (1925-08-01), Farmer
patent: 3025878 (1962-03-01), Hupp
patent: 3974857 (1976-08-01), Hehl
patent: 4399836 (1983-08-01), de Versterre et al.
patent: 4700885 (1987-10-01), Knebel

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