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1. (WO2006018293) BLOW HEAD FOR PRODUCING BLOWN TUBULAR FILM
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2006/018293 International Application No.: PCT/EP2005/008914
Publication Date: 23.02.2006 International Filing Date: 17.08.2005
Chapter 2 Demand Filed: 13.05.2006
IPC:
B29C 47/20 (2006.01) ,B29C 47/28 (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
12
Extrusion nozzles or dies
20
with annular opening, e.g. for tubular articles
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
12
Extrusion nozzles or dies
20
with annular opening, e.g. for tubular articles
28
Cross-head annular extrusion nozzles
Applicants: MAHLER, Franz[DE/DE]; DE (UsOnly)
BAIER, Christian[DE/DE]; DE (UsOnly)
HEINECKER, Michael[DE/DE]; DE (UsOnly)
LIBOWSKI, Joachim[DE/DE]; DE (UsOnly)
HOSOKAWA ALPINE AKTIENGESELLSCHAFT[DE/DE]; Peter-Dörfler-Strasse 13 - 25 86199 Augsburg, DE (AllExceptUS)
Inventors: MAHLER, Franz; DE
BAIER, Christian; DE
HEINECKER, Michael; DE
LIBOWSKI, Joachim; DE
Agent: RAPP, Bertram; Charrier Rapp & Liebau Postfach 31 02 60 86063 Augsburg, DE
Priority Data:
10 2004 040 151.919.08.2004DE
Title (EN) BLOW HEAD FOR PRODUCING BLOWN TUBULAR FILM
(FR) TETE DE SOUFFLAGE DE FILMS POUR LA PRODUCTION DE FILMS TUBULAIRES
(DE) FOLIENBLASKOPF FÜR DIE HERSTELLUNG VON SCHLAUCHFOLIEN
Abstract:
(EN) The invention relates to a blow head for producing blown tubular films from thermoplastic materials. Films produced by conventional blow heads often have dull strips or wavy areas, the so-called spiral strips. The aim of the invention is to avoid these negative film properties. For this purpose, the blow head comprises a plurality of annular gap-shaped melt channels (9, 10, 11) arranged concentrically around the center axis of the blow head, the spiral distributor (8) of the inner melt channel being arranged on the inner limiting wall in relation to the center axis of the blow head and the spiral distributor (6) of the outer melt channel being arranged on the outer limiting wall in relation to the center axis of the blow head.
(FR) Tête de soufflage de films pour la production de films tubulaires soufflés à partir de matières thermoplastiques. Les têtes de soufflage de films classiques provoquent souvent sur le film des bandes troubles ou des zones ondulées, appelées bandes hélicoïdales. L'objet de la présente invention est d'éviter ces propriétés négatives des films. A cet effet, la tête de soufflage de films possède plusieurs canaux (9, 10, 11) à matière fondue en forme de fente annulaire, situés concentriquement autour de l'axe médian de la tête de soufflage, le distributeur hélicoïdal (8) du canal à matière fondue interne étant situé sur la paroi de délimitation interne par rapport à l'axe médian de la tête de soufflage et le distributeur hélicoïdal (6) du canal à matière fondue externe étant situé sur la paroi de délimitation externe par rapport à l'axe médian de la tête de soufflage.
(DE) Die Erfindung betrifft einen Folienblaskopf zur Herstellung von Folienblasschläuchen aus thermoplastischen Kunststoffen. Bei herkömmlichen Folienblasköpfen kommt es auf der Folie zu trüben Streifen oder welligen Bereichen, den Wendelstreifen. Zur Vermeidung dieser negativen Folieneigenschaften wird ein Folienblaskopf vorgeschlagen, mit mehreren konzentrisch um die Mittelachse des Folienblaskopfes angeordneten, ringspaltförmigen Schmelzekanälen (9, 10, 11), wobei der Wendelverteiler (8) des inneren Schmelzekanals auf der in Bezug auf die Mittelachse des Folienblaskopfes innenliegenden Begrenzungswandung und der Wendelverteiler (6) des äußeren Schmelzekanals auf der in bezug auf die Mittelachse des Folienblaskopfes außenliegenden Begrenzungswandung angeordnet ist.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, 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 Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: German (DE)
Filing Language: German (DE)