Textile machine having hydraulically controlled drafting rollers

Details Textile machine having hydraulically controlled drafting rollers Textile machine having hydraulically controlled drafting rollers

1978-03-16

1980-02-12

Rimrodt, Louis

Textiles: fiber preparation

Working

Drafting

100170, D01H 552, B30B 1516

Patent

active

041875877

ABSTRACT:
Pressure between rollers in each set thereof in a drawing frame is maintained by oil pressure in a main pipe circuit connected to piston and cylinder assemblies allocated to the sets of rollers. A motor driven pump feeds oil from a tank through a feed pipe to the main circuit except when a first solenoid-controlled valve directs the oil through a first return-flow pipe branched from the feed pipe. So long as a pressure gauge connected to the main circuit is indicating the pressure to be below a minimum, it excites the first solenoid-controlled valve to close the first return-flow pipe. When, as a result of lapping on a drafting roller the gauge indicates a maximum pressure, it causes the machine to stop. A second solenoid-controlled valve has its excitation periodically suppressed to open a passage through a second return-flow pipe to prevent the temperature of the drawing frame from overheating the main pipe circuit.

REFERENCES:
patent: 3578766 (1971-05-01), Diolot
patent: 3884140 (1975-05-01), Christ et al.
patent: 3885465 (1975-05-01), Bergendahl

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