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1. (WO2018087467) VOLUMETRIC EXTRUSION ASSEMBLY FOR ELASTOMER MIXTURES
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Pub. No.: WO/2018/087467 International Application No.: PCT/FR2017/053041
Publication Date: 17.05.2018 International Filing Date: 08.11.2017
IPC:
B29C 47/36 (2006.01) ,B29C 47/10 (2006.01) ,B29C 47/40 (2006.01) ,B29C 47/08 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
08
Component parts, details or accessories; Auxiliary operations
36
Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
08
Component parts, details or accessories; Auxiliary operations
10
Feeding the material to the extruder
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
08
Component parts, details or accessories; Auxiliary operations
36
Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
38
using screws
40
using at least two intermeshing screws
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
08
Component parts, details or accessories; Auxiliary operations
Applicants:
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN [FR/FR]; 23 place des Carmes-Déchaux 63000 Clermont-Ferrand, FR
Inventors:
OUGIER, Christophe; FR
MONNEREAU, Patrice; FR
LETOCART, Arnaud; FR
Agent:
NOEL, Luminita; FR
Priority Data:
166079708.11.2016FR
Title (EN) VOLUMETRIC EXTRUSION ASSEMBLY FOR ELASTOMER MIXTURES
(FR) ENSEMBLE D'EXTRUSION VOLUMETRIQUE POUR MELANGES D'ELASTOMERES
Abstract:
(EN) The invention relates to a volumetric extrusion assembly (1) intended for extruding a mixture of elastomers, comprising a feeding extruder with a worm that rotates inside a sheath provided with a hopper for feeding a mixture which is transferred to an outlet end connected to an inlet opening (30) in the chamber of a two-screw pump (3), the two-screw pump (3) comprising two counter-rotating screws (11, 12) which turn inside said chamber when they are rotated at a drive end (16, 17) in order to transfer the mixture to an outlet end (20), the screws (11, 12) including helical threads formed so as to interlock by having mating profiles. According to the invention, said inlet opening (30) is offset downstream by a predetermined distance d relative to the start of the threads of the screws (11, 12) of the two-screw pump, so that the rotation of the screws prevents the mixture from passing upstream.
(FR) Ensemble d'extrusion (1) volumétrique destiné à l'extrusion d'un mélange d'élastomères, comportant une extrudeuse d'alimentation à vis sans fin qui tourne dans un fourreau muni d'une trémie d'alimentation en mélange qui est transféré à une extrémité de sortie reliée à un orifice d'entrée (30) dans la chambre d'une pompe bi-vis (3), la pompe bi-vis (3) comprenant deux vis (11,12) contrarotatives qui sont amenées à tourner à l'intérieur de ladite chambre lorsqu'elles sont mises en rotation à une extrémité d'entraînement (16,17) pour transférer le mélange à une extrémité de sortie(20), les vis (11,12) comportant des filets en forme d'hélice qui sont réalisés de manière à ce qu'ils s'interpénètrent en ayant des profils conjugués. Selon l'invention,ledit orifice d'entrée (30) est décalé en aval d'une distance d prédéterminée par rapport au début du filetage des vis (11,12) de la pompe bi-vis de manière à ce que la rotation des vis empêche le passage du mélange en amont.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)