PLASTICATING SCREW FOR MIXING OF POLYMERIC MATERIAL

A new plasticating apparatus including a rotating and reciprocating screw having a helical flight that is wrapped around a core, disposed within and cooperating with the inner wall of a heated barrel that substantially increases the melt quality of a polymeric material. This is accomplished by incor...

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Bibliographische Detailangaben
1. Verfasser:	DURINA, MICHAEL, F
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING AGRICULTURE ANIMAL HUSBANDRY BAKING CHEWING GUM COCOA COCOA PRODUCTS, e.g. CHOCOLATE CONFECTIONERY EDIBLE DOUGHS FISHING FOODS OR FOODSTUFFS FORESTRY HANDLING BAKED ARTICLES MADE FROM DOUGH HUMAN NECESSITIES HUNTING ICE-CREAM MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS MAKING GRANULES OR PREFORMS MANUFACTURE OF DAIRY PRODUCTS MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PREPARATION THEREOF RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SUBSTITUTES FOR COCOA OR COCOA PRODUCTS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING TRAPPING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A new plasticating apparatus including a rotating and reciprocating screw having a helical flight that is wrapped around a core, disposed within and cooperating with the inner wall of a heated barrel that substantially increases the melt quality of a polymeric material. This is accomplished by incorporating an increase in the helix angle of the primary flight at or after a taper terminus from the transition section along the metering section, in cooperationg with a stepped change in the root that terminates either upstream or downstream of the end of one complete revolution of the flight. L'invention concerne un nouvel appareil de plastification comprenant une vis à mouvement rotatif et alternatif comportant un filet hélicoïdal enroulé autour d'un noyau, située à l'intérieur de la paroi interne d'un fût chauffé et coopérant avec ce dernier, le fût chauffé augmentant sensiblement la qualité de fusion du polymère. Pour ce faire, d'une part, on augmente l'angle d'hélice d'un filet primaire au niveau d'une extrémité conique ou après cette extrémité conique, à partir de la section de transition, le long de la section de dosage, et d'autre part, on modifie progressivement l'inclinaison du fond de filet qui se termine en amont ou en aval de l'extrémité d'un tour complet du filet.