Thermally insulated die plate assembly for underwater...

B - Operations – Transporting – 29 – B

Patent

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Details

B29B 9/06 (2006.01)

Patent

CA 2733714

An insulated die plate assembly (10) for use in underwater pelletizing and other granulation processes includes a thin, continuous air chamber (32) formed across the plate assembly generally parallel to the die face (26) such that the heated upstream portion of the die plate assembly is thermally insulated from the downstream portion. The air chamber is atmospherically equilibrated by venting the air chamber to the atmosphere. The plurality of extrusion orifices, either individually or in groups, are formed in extrusion orifice (22) extensions that extend through the insulation chamber so that the process melt to be granulated can pass therethrough. The orifice extensions and the components forming the air chamber around the orifice extensions (31) are specially configured to channel heat along said extensions to maintain the process melt therein at a desired temperature, to help rigidify the die plate assembly and to better seal the air chamber (26).

L'invention porte sur un ensemble plaque porte-filière isolé (10), destiné à être utilisé pour la granulation sous l'eau et d'autres procédés de granulation. Cet ensemble comprend une chambre à air (32) mince continue, formée sur l'ensemble plaque généralement parallèlement à la surface de filière (26) de telle sorte que la partie amont chauffée de l'ensemble plaque porte-filière est thermiquement isolée de la partie aval. La chambre à air est en équilibre atmosphérique par mise à l'atmosphère de la chambre à air. La pluralité d'orifices d'extrusion sont formés, soit individuellement soit par groupes, dans des extensions d'orifices d'extrusion (22) qui s'étendent à travers la chambre isolante de telle sorte que la matière en fusion à granuler puisse passer à travers. Les extensions d'orifices et les composants formant la chambre à air autour des extensions (31) d'orifices sont configurés spécialement pour diriger la chaleur le long desdites extensions pour y maintenir la matière en fusion à une température désirée, pour aider à rigidifier l'ensemble plaque porte-filière et pour mieux étanchéifier la chambre à air (26).

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