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1. WO1994003319 - METHOD OF AND APPARATUS FOR KNEAD-EXTRUDING PLASTIC RESIN BY ALTERNATE EXTRUSION USING PLURALITY OF CYLINDERS

Publication Number WO/1994/003319
Publication Date 17.02.1994
International Application No. PCT/JP1993/001000
International Filing Date 19.07.1993
Chapter 2 Demand Filed 04.10.1993
IPC
B29C 47/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
08Component parts, details or accessories; Auxiliary operations
CPC
B29C 48/03
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
03characterised by the shape of the extruded material at extrusion
B29C 48/27
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
27Cleaning; Purging; Avoiding contamination
B29C 48/397
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
395using screws surrounded by a cooperating barrel, e.g. single screw extruders
397using a single screw
Applicants
  • FRIENDS OF FREESIA CO., LTD. [JP]/[JP] (AllExceptUS)
  • SASAKI, Beji [JP]/[JP] (UsOnly)
Inventors
  • SASAKI, Beji
Priority Data
4/25339210.08.1992JP
5/12647915.04.1993JP
5/4313525.01.1993JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) METHOD OF AND APPARATUS FOR KNEAD-EXTRUDING PLASTIC RESIN BY ALTERNATE EXTRUSION USING PLURALITY OF CYLINDERS
(FR) PROCEDE ET APPAREIL DE MALAXAGE-EXTRUSION DE RESINE PLASTIQUE PAR EXTRUSION ALTERNEE UTILISANT UNE PLURALITE DE CYLINDRES
Abstract
(EN)
A method of and an apparatus for knead-extruding a plastic resin which are free from the drawbacks encountered in conventional method and apparatus of this kind, and which have a high extrusion operation efficiency, the apparatus being provided with a single auxiliary unit having a screw driving power source and a resin hopper, and a plurality of extrusion units each of which has a resin inlet-carrying cylinder and a screw, the operation of each extrusion unit consisting of an extrusion step for knead-extruding a resin, and a cleaning step for cleaning the screws and cylinders, the extrusion step and cleaning step being carried out alternately in order in each extrusion unit. This invention enables an integrated continuous extrusion operation to be carried out without causing the extrusion steps to be interrupted by the cleaning steps.
(FR)
Procédé et appareil de malaxage-extrusion d'une résine plastique ne présentant pas les inconvénients rencrontrés dans les procédés et appareils classiques de ce type, caractérisés par un rendement élevé d'extrusion, l'appareil se présentant sous la forme d'une seule unité auxiliaire dotée d'une source de puissance d'entraînement d'une vis et d'une trémie à résine, ainsi que d'une pluralité d'unités d'extrusion comportant chacune un cylindre porteur d'entrée de résine ainsi qu'une vis, le fonctionnement de chaque unité d'extrusion comprenant une étape d'extrusion destinée à malaxer-extruder une résine, ainsi qu'une étape de nettoyage destinée au nettoyage des vis et des cylindres, l'étape d'extrusion ainsi que l'étape de nettoyage étant exécutées en ordre alterné dans chaque unité d'extrusion. Cette invention permet de procéder à une extrusion continue intégrée sans que les étapes de nettoyage n'interrompent les étapes d'extrusion.
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