ES291493A1 - Procedure for the production of objects of thermoplastic materials (Machine-translation by Google Translate, not legally binding)
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Procedure for the production of objects of thermoplastic materials (Machine-translation by Google Translate, not legally binding)
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oHG Negri Passi & C Societr Pe
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oHG Negri Passi & C Societr Pe
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Publication of ES291493A1publicationCriticalpatent/ES291493A1/en
Process for the production of objects of thermoplastic materials, of various colors or of different fluidity by means of injection molding, characterized in that it consists essentially of pre-injecting, by means of low-pressure auxiliary cylinders, the materials of various colors or fluidities, in pre-dosed quantities and in succession, in the chamber of the main cylinder during the return phase of the injection piston, that is when the pressure in said chamber is remarkably reduced with respect to the injection, and then proceeding to the normal injection, of the set of the different plastic materials in the mold of the object by the main piston only, while preventing backflow of said materials in the auxiliary cylinders. (Machine-translation by Google Translate, not legally binding)
ES0291493A1962-10-131963-09-02Procedure for the production of objects of thermoplastic materials (Machine-translation by Google Translate, not legally binding)
ExpiredES291493A1
(en)
Device for the disposal of injectable material for injection machine or molds with at least two steps. (Machine-translation by Google Translate, not legally binding)
A perfection in the heating cylinders of the injector machines of thermoplastic materials fueled by preplastifier (Machine-translation by Google Translate, not legally binding)