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1. WO1991000172 - TUBULAR PRODUCT AND METHOD AND APPARATUS FOR MAKING SAID PRODUCT

Publication Number WO/1991/000172
Publication Date 10.01.1991
International Application No. PCT/NO1990/000110
International Filing Date 02.07.1990
Chapter 2 Demand Filed 28.01.1991
IPC
B29C 44/32 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
44Shaping by internal pressure generated in the material, e.g. swelling or foaming
20for articles of indefinite length
32Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
B29C 53/48 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
53Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
36Bending and joining, e.g. for making hollow articles
38by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
48for articles of indefinite length, i.e. bending a strip progressively
CPC
B29C 44/324
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
44Shaping by internal pressure generated in the material, e.g. swelling or foaming ; ; Producing porous or cellular expanded plastics articles
20for articles of indefinite length
32Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
322the preformed parts being elongated inserts, e.g. cables
324the preformed parts being tubular or folded to a tubular shape
B29C 53/48
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
53Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
36Bending and joining, e.g. for making hollow articles
38by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
48for articles of indefinite length, i.e. bending a strip progressively
B29K 2105/04
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
2105Condition, form or state of moulded material ; or of the material to be shaped
04cellular or porous
Applicants
  • HAGTVEDT, Finn [NO/NO]; NO (AllExceptUS)
  • JENSEN, Gaute [NO/NO]; NO (UsOnly)
  • LURÅS, Arne, Vidar [NO/NO]; NO (UsOnly)
Inventors
  • JENSEN, Gaute; NO
  • LURÅS, Arne, Vidar; NO
Agents
  • CURO AS; Postbox 38 N-7094 Lundamo, NO
Priority Data
89273603.07.1989NO
Publication Language English (EN)
Filing Language Norvegian (NO)
Designated States
Title
(EN) TUBULAR PRODUCT AND METHOD AND APPARATUS FOR MAKING SAID PRODUCT
(FR) PRODUIT TUBULAIRE ET PROCEDE ET APPAREIL DE FABRICATION D'UN TEL PRODUIT
Abstract
(EN)
Rod-shaped structural element, such as for uprights, braced elements and the like, consisting of an outer, generally tubular main element (11) that forms an integrated sandwich structure with an inner foamed mass (20), where forces can be transferred between the interior of the generally tubular element and the foamed mass. When the outer tubular element is being formed, a known method is used to supply a two-component foamed mass that is being shaped. Before or during the supply of the foamed mixture there is a pretreatment on the inside of the tubular element, preferably degreasing, to increase the adhesion between the foam (20) and the outer tube (11) and possibly the inner tube (12). The outer tubular element is preferably positioned with a fall in the direction of movement in the area downstream of the supply of the foamed mass.
(FR)
L'invention se rapporte à un élément structurel en forme de tige, qui est conçu par exemple pour des éléments en treillis verticaux et similaires et qui se compose d'un élément principal externe généralement tubulaire (11), qui forme une structure en sandwich intégrée pourvue d'une masse en mousse interne (20). Dans un tel élément, les forces peuvent être transférées entre l'intérieur de l'élément généralement tubulaire et la masse en mousse. Lors de la formation de l'élément tubulaire externe, un procédé connu est utilisé pour introduire une masse en mousse à deux composants, qui est façonnée. Avant ou pendant l'introduction du mélange à base de mousse, on procède à un prétraitement sur l'intérieur de l'élément tubulaire, tel que de préférence un dégraissage, afin d'accroître l'adhérence entre la mousse (20) et le tube externe (11) et, si possible le tube interne (12). L'élément tubulaire externe est de préférence conçu avec une dépression disposée dans le sens du mouvement dans la région située en aval du point d'introduction de la masse en mousse.
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