Process and device for drawing off and blocking off a melt,...

Details Process and device for drawing off and blocking off a melt,... Process and device for drawing off and blocking off a melt,...

D - Textiles, Paper

01

D

D01D 4/00 (2006.01) B29C 47/12 (2006.01) B29C 47/30 (2006.01) B29C 47/86 (2006.01)

Patent

CA 2072354

Process and device for drawing off and blocking off a melt, especially of plastic material, with a heatable melter (1) fitted with a blocking valve (3) acting as a melt distributor from which the melt flows into a nozzle plate (10) which divides the melt by means of nozzles (14) into a plurality of threads, whereby the temperature of the melter and nozzle plate is regulated separately and the blocking valve is closed to block the melt off and the nozzle plate is tightly closed off by a cover (18). To draw off the melt with the blocking valve open, the temperature of the melter and the nozzle plate is kept substantially at the same level and to block off the melt with the blocking valve closed the nozzle plate is taken to a temperature just above the solidification temperature of the melt material. With the closure of the blocking valve the cover, which is cooled to a temperature considerably below the solidification temperature, is laid on the nozzle plate into which residual melt flows and seals off the nozzle apertures in the solidified state.

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