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1. (WO2010072824) EXPANSION DUMMY BLOCK FOR EXTRUDING PRESS FOR HOLLOW BODIES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/072824 International Application No.: PCT/EP2009/067889
Publication Date: 01.07.2010 International Filing Date: 23.12.2009
Chapter 2 Demand Filed: 22.10.2010
IPC:
B21C 26/00 (2006.01) ,B21C 23/08 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
C
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
26
Rams or plungers for metal extruding; Discs therefor
B PERFORMING OPERATIONS; TRANSPORTING
21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
C
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
23
Extruding metal; Impact extrusion
02
Making uncoated products
04
by direct extrusion
08
Making wire, rods or tubes
Applicants:
DANIELI & C. OFFICINE MECCANICHE S.P.A. [IT/IT]; Via Nazionale 41 I-33042 Buttrio, IT (AllExceptUS)
COSOLO, Maurizio [IT/IT]; IT (UsOnly)
D'ALESSANDRO, Angelo [IT/IT]; IT (UsOnly)
Inventors:
COSOLO, Maurizio; IT
D'ALESSANDRO, Angelo; IT
Agent:
CINQUANTINI, Bruno; NOTARBARTOLO & GERVASI S.p.A. Corso di Porta Vittoria 9 I-20122 Milan, IT
Priority Data:
MI2008A00232524.12.2008IT
Title (EN) EXPANSION DUMMY BLOCK FOR EXTRUDING PRESS FOR HOLLOW BODIES
(FR) GRAIN DE POUSSÉE D'EXPANSION POUR PRESSE À FILER POUR DES CORPS CREUX
Abstract:
(EN) An expansion dummy block for extruding press for hollow bodies is described, the press comprising a container with a hole in which the material (323) to be extruded is inserted and a mandrel (327) for centrally perforating said material (323). The dummy block tightly slides inside the hole of the container pushed by a punch(304), and comprises: an internal hole for containing the mandrel (327) and let it slide therein; a head adapted to be elastically deformed so as to expand into the external edge contacting the container hole, and to expand into the internal edge (325) towards the internal hole contacting the mandrel (327) due to the reaction force produced by the contact with the material (323) upon the thrust received from said punch(304), and to withdraw when the reaction force is exhausted.
(FR) L'invention concerne un grain de poussée d'expansion pour une presse à filer pour des corps creux, la presse comprenant un récipient comportant un trou dans lequel la matière (323) à extruder est insérée, et un mandrin (327) pour perforer de façon centrale ladite matière (323). Le grain de poussée coulisse de façon étanche à l'intérieur du trou du récipient en étant poussé par un poinçon (304), et comprend: un trou interne pour contenir le mandrin (327) et le laisser coulisser dans celui-ci; une tête adaptée pour être élastiquement déformée de manière à s'expanser dans le bord interne en contact avec le trou du récipient, et à s'expanser dans le bord interne (325) en direction du trou interne en contact avec le mandrin (327) sous l'effet de la force de réaction qui est produite par le contact avec la matière (323) au moment de la poussée appliquée par ledit poinçon (304), et à se retirer lorsque la force de réaction est épuisée.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, IS, JP, KE, KG, KM, 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, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, 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, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP2379245