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1. (WO2015043888) WEARING BODY FOR RECEIVING A TWIN SCREW FOR EXTRUDING MELTABLE MATERIAL
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2015/043888 International Application No.: PCT/EP2014/068557
Publication Date: 02.04.2015 International Filing Date: 02.09.2014
IPC:
B29C 47/08 (2006.01) ,B29C 47/40 (2006.01) ,B29C 47/66 (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
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
36
Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
58
Details
66
Barrels or cylinders
Applicants:
KRAUSSMAFFEI BERSTORFF GMBH [DE/DE]; An der Breiten Wiese 3 - 5 30625 Hannover, DE
Inventors:
SCHEEL, Gerhard; DE
BEHLING, Michael; DE
Agent:
ROIDER, Stephan; DE
Priority Data:
10 2013 110 671.426.09.2013DE
Title (EN) WEARING BODY FOR RECEIVING A TWIN SCREW FOR EXTRUDING MELTABLE MATERIAL
(FR) CORPS D'USURE POUR RECEVOIR UNE DOUBLE VIS POUR L'EXTRUSION D'UNE MATIÈRE FUSIBLE
(DE) VERSCHLEISSKÖRPER ZUR AUFNAHME EINER DOPPELSCHNECKE ZUR EXTRUSION VON SCHMELZFÄHIGEM MATERIAL
Abstract:
(EN) The invention relates to a wearing body or bushing having an axial twin borehole (ZB) for receiving a twin screw for extruding meltable material, in particular plastic. In order to avoid cracking and to save material, the wearing body according to the invention has a radial cross section with an outer contour (AK), which is convexly curved over the entire circumference and is in the form of an oval, and with two axes of symmetry (SA1, SA2), which run perpendicularly to one another and the point of intersection (E) of which lies on the extrusion axis (EA), wherein the width (a) of the oval on the first axis of symmetry (SA1) is greater than the height (b) of the oval on the second axis of symmetry (SA2). The invention also relates to a housing body complementary to the wearing body and also to an extrusion cylinder for a twin-screw extruder having such a wearing body and/or housing body and also to a twin-screw extruder having such an extrusion cylinder.
(FR) L'invention concerne un corps d'usure ou une douille à double alésage axial (ZB) pour recevoir une vis double pour l'extrusion de matériau fusible, en particulier une matière plastique. Pour éviter la formation de fissures et économiser la matière, le corps d'usure de l'invention a une section transversale radiale pourvue d'un contour extérieur (AK), incurvé de manière convexe sur toute la périphérie et se présentant sous la forme d'un ovale, et de deux axes de symétrie (SA1, SA2) perpendiculaires l'un à l'autre dont le point d'intersection (E) est situé sur l'axe d'extrusion (EE). La largeur (a) de l'ovale sur le premier axe de symétrie (SA1) est supérieure à la hauteur (b) de l'ovale sur le second axe de symétrie (SA2). L'invention concerne également un corps formant boîtier complémentaire du corps d'usure et un cylindre d'extrusion destiné à une extrudeuse à double vis comportant un tel corps d'usure et/ou corps formant boîtier et une extrudeuse à double vis comportant un tel cylindre d'extrusion.
(DE) Die Erfindung betrifft einen Verschleißkörper bzw. Buchse mit einer axialen Zwillingsbohrung (ZB) zur Aufnahme einer Doppelschnecke zur Extrusion von schmelzfähigem Material, insbesondere Kunststoff. Um Rissbildung zu vermeiden und Material zu sparen, hat der erfindungsgemäße Verschleißkörper einen radialen Querschnitt mit einer über den gesamten Umfang konvex gekrümmten Außenkontur (AK) in Form eines Ovals und mit zwei senkrecht zueinander verlaufenden Symmetrieachsen (SA1, SA2), deren Schnittpunkt (E) auf der Extrusionsachse (EA) liegt, aufweist, wobei die Breite (a) des Ovals auf der ersten Symmetrieachse (SA1) größer ist als die Höhe (b) des Ovals auf der zweiten Symmetrieachse (SA2). Die Erfindung betrifft außerdem einen zum Verschleißkörper komplementären Gehäusekörper sowie einen Extrusionszylinder für einen Doppelschneckenextruder mit einem solchen Verschleißkörper und/oder Gehäusekörper sowie einen Doppelschneckenextruder mit einem solchen Extrusionszylinder.
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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, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, 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: German (DE)
Filing Language: German (DE)