WO1984000920A1 - Procede et appareil de fabrication d'articles oblongs en mousse integrale de polyurethane ou en materiau correspondant - Google Patents

Procede et appareil de fabrication d'articles oblongs en mousse integrale de polyurethane ou en materiau correspondant Download PDF

Info

Publication number
WO1984000920A1
WO1984000920A1 PCT/DK1983/000081 DK8300081W WO8400920A1 WO 1984000920 A1 WO1984000920 A1 WO 1984000920A1 DK 8300081 W DK8300081 W DK 8300081W WO 8400920 A1 WO8400920 A1 WO 8400920A1
Authority
WO
WIPO (PCT)
Prior art keywords
moulding
moulding chamber
mould
nozzle head
strings
Prior art date
Application number
PCT/DK1983/000081
Other languages
English (en)
Inventor
Thomas Broennum
Ole Kiilerich
Original Assignee
Thomas Broennum
Ole Kiilerich
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomas Broennum, Ole Kiilerich filed Critical Thomas Broennum
Priority to AU19402/83A priority Critical patent/AU1940283A/en
Publication of WO1984000920A1 publication Critical patent/WO1984000920A1/fr
Priority to DK2062/84A priority patent/DK206284D0/da

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/30—Expanding the moulding material between endless belts or rollers
    • B29C44/302—Expanding the moulding material in flexible endless moulds

Definitions

  • a method and an apparatus for manufacturing oblong articles of polyurethane integral foam or a corresponding material are described in detail below.
  • the present invention relates to a method of manufacturing oblong articles of polyurethane integral foam or a corresponding hardenable material, which is injected into a mould and is caused to harden under pressure therein.
  • Articles of integral foam show surfaces of solid, non-foamed material, while the articles other ⁇ wise consist of a heat insulating foam material, and such articles are found to have a high mechanical strength and stability, whereby they are usable as entirely or partially self carrying construction elements for many different purposes. It is hereby advantageous that they are mouldable with complex shapes and may form light and cheap castings, but for many purposes they are attractive even with less complex shapes, e.g. as tubular or rod shaped products.
  • Such integral foam products might be produced by extrusion, but the material is unsuited for conventional extrusion, because a rather high pressure is required in the mould inasfar as the foaming up material, in order to form the compact surface layer, shall seek to expand to a volume, which is considerably larger than the mould cavity. Moreover, the setting of the moulding material takes places slowlier than e.g. the cooling setting as enabling an extrusion shaping of metal and thermo- plastics, and it seems to be a fact that integral foam articles have so far been produced in closed moulds, even such articles, the shape of which could otherwise condition a production by extrusion.
  • the invention is based on the recognition that this purpose can be fulfilled by a modified application of a rather special extrusion technique, which is already known from other fields of the art, and by which the moulding material is successively injected into a forwardly moved moulding chamber as formed by opposed mould parts on endless belts or chains which engage each other along a common forward run, whereby the material, e.g. concrete, reaches to get shape stabilized before it is delivered from the forward run of the mould parts.
  • the forwardly moving mould parts are then moved away from each other and from the material under " delivery, and they are returned, through outer return runs, so as to be successively rejoined adjacent the area of material introduction.
  • a "plug" should be provided for enabling the necessary build-up or maintenance of the overpressure, but such a plug may be natuarlly formed by a nozzle head, through which the injection of the foam material takes place, as this nozzle head may simply fill out the cross section of the mould chamber.
  • a plug may be natuarlly formed by a nozzle head, through which the injection of the foam material takes place, as this nozzle head may simply fill out the cross section of the mould chamber.
  • Fig. 1 is a perspective view of a system according to the invention
  • Fig. 2 is a longitudinal section through a part thereof.
  • Fig. 3 is a sectional view of the outer portion of the nozzle head
  • Fig. 4 is a sectional view of a modified nozzle head,
  • the system shown in Fig. 1 comprises a pair of endless chains 2 and 4, each made of heavy chain links in the form of blocks 6, which are brought to abut each other along a common forward run 8 of the two chains.
  • the blocks 6 are provided with exterior, longitudinal grooves 10, which, for the two chains is common, will form a longitudinal channel through the forward chain run 8.
  • the blocks 6 of the two chains are forced sealingly against each other, e.g. by means of opposed rows of stationary pressure rollers 12.
  • the left hand end - the introduction end - of
  • the common forward run 8 is shown a stationary injector unit 14 having an inlet tube 16, and a pair of reincorcing strings 18 as supplied from supply reels 20; . these strings may be glass fibre roving.
  • a rod 22 is shown in the right hand end as under delivery from the run 8 and constituting the final casting.
  • the chains 2 and 4 are driven by suitable driving and guiding means at a predetermined, uniform speed, this speed as well as the length of the common run 8 being adjusted according to the expansion and stetting characteristics of the moulding material.
  • the injector unit 14 consists of a nozzle head 24, which fills out the cross section of the moulding channel 26 as formed by the juxtapposed block grooves 10 along the chain run 8.
  • the nozzle head 24 has a centrait injector opening 28, which is connected with the inlet tube 16 and continues forwardly in a hopperlike widening inlet nozzle 30, in the wall of which admission holes 32 for the reinforcing strings 18 are provided.
  • a foaming up moulding material which starts to expand immediately by its entrance into the conical inlet nozzle 30.
  • the shape of this nozzle favours the foam material, during its introduction into the forwardly moved moulding channel 26 of the chain run 8, to expand for the achievement of isotropic flow and pressure conditions, which seems to be important for obtaining a perfect moulding result.
  • the expanding material produces a considerable pressure in the moulding channel 26 and is, besides, brought along by or in the forwardly moving channel. By its pressure against the walls of the moulding channel the material soon forms a solid skin layer 34 of increasing thickness, and after a while also the central foam material will set, e.g. at
  • the moulding material will thus form a rigid plug in the moulding channel 26, and this plug - which is created successively and continues towards the right in the final product rod 22 - will constitute a ridig wall towards that part of the moulding channel 26, in which the moulding material is still under initial setting under a high pressure, the said material plug being able to resist this high pressure.
  • the moulding chamber is confined by the nozzle head 24, which is materially sufficiently tightly engaging the inner wall of the moulding channel 26. It should be emphasized that ' ihe nozzle head 24 need not show any complete mechanical sealing against the wall of the moulding channel 26, beceause the moulding material itself will contribute to create the required sealing.
  • the moulding material will here get the same opportunity to expand under pressure against the sides of the mould as when moulded in a stationary, closed mould, but the result will be a continuously delivered product rod 22, which can be cut at desired lengths, whereby these single lengths will show a rigid skin formation on those parts thereof, which are in practice the more interesting" or relevant, viz. _the outer longitudinal surface portions.
  • the finished moulding product 22 is liberated from the chain run 8 by outward pivoting of the link blocks 6, and to this end it may be important that a slip agent has been applied to the walls of the moulding grooves 10.
  • a slip agent may be supplied from a nozzle system 36 cooperating with the exterior sides of the blocks 6 during the return run of the blocks.
  • the blocks Prior to the application of the slip agent the blocks, during their return run, may pass a brushing station 38, in which the moulding grooves 10 are cleaned for possible remaining moulding material therein.
  • a brushing cleaning may be supported by means of compressed air from a nozzle system 40, and the brushed off material rests may be sucked away through a suction nozzle 42.
  • the reinforcing strings 18 as introduced through the holes 32 will get rigidly anchored in the set moulding material to the right of the line a and will thus automatically be pulled into the mould product by the very movement of the chains 2 and 4.
  • these strings may be held by a certain friction or introduction resistance, whereby the introduction will take place with an established pull tension in the strings, such that they will be incorporated in the final product in a pre-tensioned condition.
  • the final product may of course be further reinforced by way of short, suitable reinforcing fibres being mixed into -the injected moulding material.
  • the outer end of the nozzle head 24 may be designed as shown in Fig..3, viz. so as to have a rearwardly oriented scraper edge 44 capable of scraping off possible rests of moulding material from the mould blocks 6.
  • the injector opening 28 may be shaped as a ring nozzle about a large inlet opening for a pipe, which may then form a central portion of the moulded product, e.g. a conductor pipe as hereby provided with a coating of a heat insulating foam material, whether a hard or a soft foam.
  • a heat insulating foam material whether a hard or a soft foam.
  • the foam material will adhere to the pipe surface in such a manner that in the area around the latter and inside the wall of the moulding channel 26 "the moulding material may still successively build up a "plug area", which can resist the considerable overpressure in the forming area of the final foam layer on the pipe.
  • the mould blocks 6 be heatabie or coolable during the moulding process, and the blocks, therefore, may be designed so as to have interior heating or cooling channels, which, particularly along the forward chain run 8, are connectable with outer inlet and outlet means for a heating or cooling medium, though such an arrangement should not here be described in more detail.
  • the hopper shaped material inlet 30 may be dispensed with, whereby the nozzle head 24 as illustrated in Fig. 4 may consist of a simple nozzle plate 46 having, if relevant, inlet holes 32 for reinforcing strings 18.
  • the invention is not limited to the production of profiles of a polyurethan material or a foam material,, generally, inasfar as the method and the system according to the invention may well be used or adapted for many other usable materials, with or without reinforcement.
  • polyester concrete from which it may be desirable to produce profiles as reinforced by a unidirectional long fibre reinforcement and/or random distributed short fibre reinforcement, or even without fibre reinforcement at all.
  • a conventional moulding of polyester concrete and similar materials it can be extremely difficult to remove the air, which is
  • the injector plug may be provided with short or long rods projecting axially forwardly through the moulding channel at least to the area of initial setting of the moulding material, whereby the produced profiles may be provided with through-going channels.
  • the moulding material should hereby slide along the rods, but for certain materials this will be possible without further, and otherwise a slip agent may supplied outward- ly through small radial holes in the particular rod core or cores.
  • the blocks 6 may be held together in a direct manner by suitable lock means, which are actuated at the injection end and released at the delivery end of the chain run.

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Pour la production d'articles oblongs en mousse intégrale de polyuréthane, qui étaient normalement produits par moulages dans des moules fermés et résistant à la pression, on utilise un appareil de moulage comportant une paire de chaînes sans fin (2, 4) de parties de moule qui sont engagées l'une avec l'autre le long d'une course en avant (8) commune pour former une chambre de moulage (26) qui se déplace continuellement vers l'avant, dans laquelle on injecte le matériau de moulage par une tête d'injection (24). La longueur de la chambre de moulage suffit au conditionnement du matériau à fabriquer avant que celui-ci (22) ne soit libéré de manière continue à l'extrémité de sortie de la chambre de moulage, de façon que le matériau forme à cette extrémité un bouchon rigide capable de résister à la surpression indispensable de l'intérieur de la chambre de moulage.
PCT/DK1983/000081 1982-09-01 1983-08-31 Procede et appareil de fabrication d'articles oblongs en mousse integrale de polyurethane ou en materiau correspondant WO1984000920A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU19402/83A AU1940283A (en) 1982-09-01 1983-08-31 Fremgangsmade og anlaeg til fremstilling af langstrakte emneraf polyurethan-integralskum eller tilsvarende materiale
DK2062/84A DK206284D0 (da) 1982-09-01 1984-04-25 Fremgangsmaade og anlaeg til fremstilling af langstrakte eemner af polyurethan-integralskum eller tilsvarende materiale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK390082 1982-09-01

Publications (1)

Publication Number Publication Date
WO1984000920A1 true WO1984000920A1 (fr) 1984-03-15

Family

ID=8128028

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1983/000081 WO1984000920A1 (fr) 1982-09-01 1983-08-31 Procede et appareil de fabrication d'articles oblongs en mousse integrale de polyurethane ou en materiau correspondant

Country Status (2)

Country Link
EP (1) EP0119215A1 (fr)
WO (1) WO1984000920A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104999680A (zh) * 2015-07-24 2015-10-28 苏州云舒新材料科技有限公司 一种气泡橡胶加工装置
DE102016110002A1 (de) * 2016-05-31 2017-11-30 BSH Hausgeräte GmbH Verfahren zum Herstellen eines Wellschlauchs für ein Haushaltsgerät, Wellschlauch, Vorrichtung sowie Haushaltsgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1704636A1 (de) * 1951-01-28 1971-05-19 Bayer Ag Vorrichtung und Verfahren zur kontinuierlichen Herstellung von Polyurethanschaumstoffprofilen
SE360596B (fr) * 1968-01-22 1973-10-01 Naphtachimie Sa
DE2522062A1 (de) * 1975-05-17 1976-11-25 Jakob Eschbach Fabrik Fuer Feu Verfahren und vorrichtung zur herstellung von profilen, platten o.dgl. aus schaumkunststoff
CH599849A5 (fr) * 1974-10-15 1978-05-31 Upjohn Co
DK126094C (da) * 1966-09-07 1983-04-18 Ugine Kuhlmann Fremgangsmaade til fremstilling af profilerede emner ved ekstrusion af ekspanderbart plastmateriale

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1704636A1 (de) * 1951-01-28 1971-05-19 Bayer Ag Vorrichtung und Verfahren zur kontinuierlichen Herstellung von Polyurethanschaumstoffprofilen
DK126094C (da) * 1966-09-07 1983-04-18 Ugine Kuhlmann Fremgangsmaade til fremstilling af profilerede emner ved ekstrusion af ekspanderbart plastmateriale
SE360596B (fr) * 1968-01-22 1973-10-01 Naphtachimie Sa
CH599849A5 (fr) * 1974-10-15 1978-05-31 Upjohn Co
DE2522062A1 (de) * 1975-05-17 1976-11-25 Jakob Eschbach Fabrik Fuer Feu Verfahren und vorrichtung zur herstellung von profilen, platten o.dgl. aus schaumkunststoff

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104999680A (zh) * 2015-07-24 2015-10-28 苏州云舒新材料科技有限公司 一种气泡橡胶加工装置
DE102016110002A1 (de) * 2016-05-31 2017-11-30 BSH Hausgeräte GmbH Verfahren zum Herstellen eines Wellschlauchs für ein Haushaltsgerät, Wellschlauch, Vorrichtung sowie Haushaltsgerät
DE102016110002B4 (de) 2016-05-31 2022-10-13 BSH Hausgeräte GmbH Verfahren zum Herstellen eines Wellschlauchs für ein Haushaltsgerät, Wellschlauch, Vorrichtung sowie Haushaltsgerät

Also Published As

Publication number Publication date
EP0119215A1 (fr) 1984-09-26

Similar Documents

Publication Publication Date Title
US5229138A (en) System for continuous manufacture of cellular products such as latex foam mattresses, cushions or the like
CA1102985A (fr) Methode et dispositif de moulage par injection et de refroidissement d'un article faconne en resine synthetique
US5876641A (en) In-line process for injection of foam material into a composite profile
RU2301740C2 (ru) Способ и устройство для получения щетинок
KR940005380A (ko) 재료가 덧대어진 표면파스너용 결합부재의 제조방법 및 장치
BR0100153A (pt) Método para fabricar um cateter e um cubo de uma peça, método de fabricar um cubo e um tubo cateter, método de fabricar um dispositivo intravascular, aparelho para forma um cateter de peça única e molde para forma um cubo e um tubo de peça única
ATE190261T1 (de) Verfahren zum herstellen von kunststoffgegenständen
JP4545435B2 (ja) 射出成形方法及び装置
EP1237697B1 (fr) Dispositif d'extrusion et procede pour produire des profiles creux en plastique comportant au moins un espace de chambre creuse en mousse expansee
EA000941B1 (ru) Устройство и способ получения вспененного материала
WO1984000920A1 (fr) Procede et appareil de fabrication d'articles oblongs en mousse integrale de polyurethane ou en materiau correspondant
JP4397051B2 (ja) 中空状プラスチック製構成部品を製造する方法および装置
US4064208A (en) Molding method with automatic fluid treatment of mold cavity
JP2001514101A (ja) 建材パネルと建材パネルを形成する方法及び装置
CA2447745C (fr) Formage de panneaux mousseux au moyen de la pultrusion
US5035846A (en) System and process for continuous manufacture of cellular products such as latex foam mattresses, cushions or the like
KR100824613B1 (ko) 압출 성형물 냉각 시스템
DE2305873A1 (de) Vorrichtung zur kontinuierlichen herstellung von verbundprofilen aus metall und kunststoff
CH527054A (de) Verfahren und Vorrichtung zur Herstellung von beliebig langen Platten, Blöcken oder sonstigen geformten Teilen aus expandierfähigen Kunststoffen
CN211416367U (zh) 一种用于复合材料生产的拉挤模具及具有型腔的纤维增强复合材料
KR19990080374A (ko) 합성 수지관 및 그 제조 장치
DE2366018C2 (de) Verfahren zur Herstellung eines Kunststoffrohres mit quergerillter Außenfläche für elektrische Leitungen
EP0006270A1 (fr) Procédé et appareil de fabrication d'objets en mousse structurale thermoplastique
JPH04336209A (ja) 流動性の密実もしくは気泡プラスチックを形成する反応混合物を製造するための混合ヘッド
US4692286A (en) Method of producing a continuous length structure

Legal Events

Date Code Title Description
AK Designated states

Designated state(s): AU BR DE DE DK FI JP NO SU US

AL Designated countries for regional patents

Designated state(s): AT BE CH DE FR GB LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1983902754

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1983902754

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWW Wipo information: withdrawn in national office

Ref document number: 1983902754

Country of ref document: EP