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Pirelli and C SpA
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Pirelli SpA
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Publication date
Application filed by Pirelli SpAfiledCriticalPirelli SpA
Publication of ES282016A2publicationCriticalpatent/ES282016A2/en
Processing And Handling Of Plastics And Other Materials For Molding In General
(AREA)
Abstract
An improvement introduced in the object of the main drawer number 279,474 by a procedure for continuously mixing plastic material, characterized in that said method uses a device that comprises an extension of the body of the drawing, on the side of the feed, inside which is provided a frustoconical cavity with the smaller diameter attached to the cylindrical cavity in which the screw of the drawing rod rotates and provided, on the larger diameter side, with an opening for feeding of the material; mounted in said cavity and secured on the side of smaller diameter with the screw of the drawing, a screw of frustoconical shape whose turns determine at least one helical channel whose cross-section is decreasing from the side of the feed to that of the discharge; a chamber delimited by the envelope surface of said screw and by the internal surface of said cavity, whose height, measured radially with respect to the screw itself, is variable from at least a minimum to at least a maximum. (Machine-translation by Google Translate, not legally binding)
ES282016A1961-10-171962-10-17A procedure for continuously mixing plastic material (Machine-translation by Google Translate, not legally binding)
ExpiredES282016A2
(en)
Improvements in the molding by transfer and injection through a press supplied with a tornillon sinfin. (Machine-translation by Google Translate, not legally binding)