Filling level monitoring device

Details Filling level monitoring device Filling level monitoring device

1983-11-15

1984-11-27

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

264 403, 264102, 264203, 264DIG78, 366 75, 425147, 425169, 425203, 425DIG60, B29F 303

Patent

active

044848781

ABSTRACT:
A device for monitoring the filling level of the degassing space in an extruder used for processing thermoplastic materials comprises a level detection orifice located in the degassing dome or jacket of the extruder which opening is connected to a conduit. The conduit leads through a regulator device to a gas source. Connected to the conduit, between the regulator device and the orifice, is a pressure sensor such as a pressure difference switch. If the level of molten material in the dome rises above a preselected level, it blocks the opening and produces a back-pressure in the conduit. The switch is automatically actuated by this back-pressure and produces a signal. Appropriate action can then be taken to prevent the further rise of the molten material in the dome and to prevent blockage of the degassing device.

REFERENCES:
patent: 3842151 (1974-10-01), Stoy et al.
patent: 4181510 (1980-01-01), Sano et al.
patent: 4197268 (1980-04-01), Anders
patent: 4214859 (1980-07-01), Anders
patent: 4298322 (1981-11-01), Anders et al.
patent: 4321230 (1982-03-01), Hungerford

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