Apparatus for the extraction of melt samples from a material whi

Details Apparatus for the extraction of melt samples from a material whi Apparatus for the extraction of melt samples from a material whi

1989-07-06

1990-11-27

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

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

264 401, 2643281, 425169, 4253824, 425556, 425560, 425561, 425564, B29C 4540

Patent

active

049732390

ABSTRACT:
An apparatus for the extraction of melt samples, particularly from continuously operating plastics processing plants, has a test sample mould which is connected to a melt channel via a transfer channel. There are provided a shutoff device and a device for transferring the melt into the mould. In the transfer channel there is arranged a suction piston which sucks the melt out of the melt channel into the transfer channel which in this case is opened simultaneously. In addition, there is provided a pressure piston for injecting this melt into the moulding chamber. An apparatus of particularly simple construction is created in this way and permits extraction of melt samples without the melt coming into contact with the atmosphere, no dead spaces at all being created at the same time in the melt channel during the time when no melt samples are extracted.

REFERENCES:
patent: 3723037 (1973-03-01), Formo
patent: 3975128 (1976-08-01), Schluter
patent: 4099904 (1978-07-01), Dawson
patent: 4255368 (1981-03-01), Olabisi
patent: 4722679 (1988-02-01), Farrell

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