Device for shaping plastic objects under inert atmosphere

Details Device for shaping plastic objects under inert atmosphere Device for shaping plastic objects under inert atmosphere

B - Operations, Transporting

29

C

B29C 47/10 (2006.01) B29C 45/17 (2006.01) B29C 45/18 (2006.01)

Patent

CA 2421696

The invention concerns a device for producing plastic objects by shaping under inert atmosphere, comprising a hopper (1), an endless screw and means for shaping melted polymer. The device for injecting inert gas comprises a gas supply conduit (3), a gas injection surface at the hopper (1) wall and a homogenising chamber co-operating between the hopper (1) wall and the gas supply conduit (3). The end (32) of the gas supply conduit (3) oriented towards the injection surface is closed and has at least a radial orifice (33) for ejecting gas perpendicularly to its flow direction in the conduit.

L'invention concerne un dispositif de production d'objets en plastique par mise en forme sous atmosphère inerte, comprenant une trémie, une vis sans fin et des moyens de mise en forme du polymère fondu. Le dispositif d'injection du gaz inerte comprend une conduite d'alimentation en gaz (3), une surface d'injection du gaz au niveau de la paroi de la trémie (1) et une chambre d'homogénéisation coopérant entre la paroi de la trémie (1) et la conduite d'alimentation en gaz. L'extrémité de la conduite d'alimentation en gaz dirigée vers la surface d'injection est fermée et présente au moins une ouverture (33) o radiale permettant une éjection du gaz perpendiculairement à son sens de circulation dans la conduite.

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