WO2005092592A1 - Moule - Google Patents

Moule Download PDF

Info

Publication number
WO2005092592A1
WO2005092592A1 PCT/IB2005/000321 IB2005000321W WO2005092592A1 WO 2005092592 A1 WO2005092592 A1 WO 2005092592A1 IB 2005000321 W IB2005000321 W IB 2005000321W WO 2005092592 A1 WO2005092592 A1 WO 2005092592A1
Authority
WO
WIPO (PCT)
Prior art keywords
moulding
core
polystyrene
plastics material
manufacturing
Prior art date
Application number
PCT/IB2005/000321
Other languages
English (en)
Inventor
Erhard HÖNIG
Original Assignee
Plastrim Investments Cc
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 Plastrim Investments Cc filed Critical Plastrim Investments Cc
Publication of WO2005092592A1 publication Critical patent/WO2005092592A1/fr

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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/157—Coating linked inserts, e.g. chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING 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
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material

Definitions

  • This invention relates to a moulding, to a method of manufacture thereof, to an apparatus for manufacturing the moulding, and to a product of the method of manufacture or of the apparatus.
  • a moulding that comprises an elongated preformed core with a layer of a synthetic plastics material extruded around at least a substantial part thereof.
  • a method of manufacturing a moulding that includes the step of extruding a synthetic plastics material around at least a substantial part of an elongated preformed core.
  • an apparatus for manufacturing a moulding which includes an extrusion head for extruding a synthetic plastics material around at least a substantial part of an elongated preformed core; and a feeder for feeding a length of the preformed core into and through the extrusion head.
  • a moulding that is a product of the method or the apparatus described above.
  • the plastics material may be extruded around the entire core.
  • the core may have a planar base and the plastics material may instead be extruded over the entire periphery, except for the base.
  • the core may be preformed by any suitable means, for example by extrusion, moulding or machining, so as to form a desired profile for the moulding.
  • the core may be of wood, or wood particles, for example chipboard or supawood.
  • the molding may, without limitation, be for a picture frame member, a rail, or a cornice.
  • the extrusion head may be of the transverse type, the core being fed in a direction that is transverse to a direction in which the plastic material to be extruded is fed.
  • the apparatus may further have a calibrator for sizing the profile of the article emanating from the extrusion head.
  • the plastics material may be a foamed polystyrene.
  • the composition of the foamed polystyrene may include : hi-impact polystyrene; and crystal grade polystyrene, the hi-impact polystyrene and the crystal grade polystyrene being intimately admixed, the amount of the hi-impact polystyrene and the crystal grade polystyrene together amou nting to at least 90 percentage, by mass, of the composition, and the mass ratio of hi-irnpact polystyrene to the crystal grade polystyrene being between 70 : 30 and 30 : 70.
  • the mass ratio of the hi-impact polystyrene to the crystal grade polystyre ne is preferably between 60 : 40 and 40 : 60 and most preferably between 55 : 45 and 45 : 55.
  • the hi-impact polystyrene and the crystal grade polystyrene together may comprise most of the plastics material, with a foaming agent and a pigment also being added.
  • Figure 1 is a schematic cross-sectional side view of a moulding in accordance with the invention, in the form of a picture frame member;
  • Figure 2 is a schematic cross-sectional side view of an apparatus for manufacturing the picture frame member, in accordance with the invention; and
  • Figure 3 is schematic an end view of the apparatus of Figure 2 viewed in the direction
  • a moulding in accordance with the invention in the form of a picture frame member is designated generally by reference numeral 2.
  • the moulding 2 has a chipboard core 4 with a layer of synthetic plastics material 6 extruded around the core 4.
  • the core 4 has a planar base 7.
  • an apparatus, in use, for a method of manufacturing the picture frame member 2 in accordance with the invention is designated generally by reference numeral 10.
  • the apparatus 10 includes an extrusion head 12 and a feeder 13 for feeding a length of the preformed core 4 into and through the extrusion head 12.
  • the apparatus also includes a screw 14 and a calibrator 16, the calibrator 16 being used for sizing the picture frame member 2 emanating from the extrusion head 12.
  • the extrusion head 12 has a passage 18 which extends from one end 20 of the extrusion head 12, via a cavity 22, to the other end 24.
  • the screw 14 is located in a passage 26, which is transverse to the passage 18, and which opens into the cavity 22.
  • a passage 28 extends through the calibrator 16 and is co-linear with the passage 18.
  • the passage 18 has an upstream portion 21 which is substantially the same size and shape as the core 4, with an appropriate profile in accordance with the profile that the moulding is to have.
  • a length of the chipboard core 4 is fed into the extrusion head 12 in the direction of arrow "A" and passes through the cavity 22.
  • the core 4 which is fed into the extrusion head 12 is of any suitable length and has previously been machined to a desired profile for the picture frame member. Preferably, consecutive lengths of core are joined together, end-on-end, for example by adhesive prior to entering the extrusion head 12 to provide longer lengths of picture frame members.
  • a charge of plastics material 42 is fed into the cavity 22 by the screw 14 in the direction of arrow "B", which is transverse to the direction of movement of the core 4.
  • the extrusion head 12 is thus of the transverse type.
  • the charge of plastics material 42 is a foamed polystyrene having a composition which comprises primarily hi-impact polystyrene and crystal grade polystyrene, the hi-impact polystyrene and the crystal grade polystyrene being intimately admixed, the mass ratio of hi-impact polystyrene to the crystal grade polystyrene being 1 : 1.
  • the plastics material 42 also contains foaming agent and pigment.
  • the charge of plastics material 42 moves around the core 4, as indicated by arrows "C” and "D", so as to form the layer of plastics material 6 around the core 4.
  • the core 4 with its layer of plastics material 6 then passes from the cavity 22 through the portion 34 of the passage 18 and thereafter through the passage 28 of the calibrator 16.
  • the dimensions of the calibrator are slightly larger than those of the portion 34, which enables the layer 6 to expand.
  • the layer 6 is then allowed to cool on the core 4.
  • a method of manufacturing a picture frame member is provided which can be time-efficient and inexpensive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

L'invention porte sur un moule comprenant un noyau allongé préformé en aggloméré ou Supawood (4) pourvu d'une couche d'une matière plastique synthétique (6) extrudée autour d'au moins une partie substantielle de celui-ci. La matière plastique (6) est un polystyrène alvéolaire dont la composition comprend un polystyrène choc et un polystyrène à teneur cristalline, le rapport en masse du polystyrène choc au polystyrène à teneur cristalline étant compris entre 55: 45 et 45: 55. L'invention porte également sur un procédé et sur un appareil de fabrication de ce moule.
PCT/IB2005/000321 2004-03-18 2005-03-18 Moule WO2005092592A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200402180 2004-03-18
ZA2004/2180 2004-03-18

Publications (1)

Publication Number Publication Date
WO2005092592A1 true WO2005092592A1 (fr) 2005-10-06

Family

ID=34962275

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/000321 WO2005092592A1 (fr) 2004-03-18 2005-03-18 Moule

Country Status (1)

Country Link
WO (1) WO2005092592A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO340414B1 (no) * 2014-12-22 2017-04-18 Hallingplast As Stolpe omfattende en trekjerne som på sin ytterside er påført en kontinuerlige beskyttelseskappe, samt fremgangsmåte for fremstilling av en slik stolpe.
CN111805865A (zh) * 2020-09-02 2020-10-23 临朐瑞星塑胶制品有限公司 一种阻燃胶条成型模具

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926729A (en) * 1956-04-07 1960-03-01 Zanini Luigi Process to embody wooden laths with coating of plastic material
DE1579003B1 (de) * 1964-12-05 1971-09-08 Luigi Zanini Verfahren zur herstellung von endlosen profilleisten, insbesondere fuer jalousien oder fensterrahmen
EP0210297A1 (fr) * 1985-08-02 1987-02-04 Schock & Co. GmbH Procédé et dispositif pour l'enduction par extrusion en continu de profilés en bois avec une matière thermoplastique
US5819458A (en) * 1995-09-29 1998-10-13 Hadden; David M. Reinforced picture frame moulding
US6066680A (en) * 1996-05-16 2000-05-23 Marley Mouldings Inc. Extrudable composite of polymer and wood flour
US6254369B1 (en) * 1998-10-16 2001-07-03 Daniel M. Kelly Extrusion die for forming a skin on reusable construction material for concrete forms
US6336265B1 (en) * 1999-05-05 2002-01-08 Siegfried Niedermair Composite railroad cross tie and method of manufacturing same
EP1250995A1 (fr) * 2000-01-26 2002-10-23 Sekisui Chemical Co., Ltd. Article moule a partir d'une matiere composite thermoplastique et procede de production dudit article

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926729A (en) * 1956-04-07 1960-03-01 Zanini Luigi Process to embody wooden laths with coating of plastic material
DE1579003B1 (de) * 1964-12-05 1971-09-08 Luigi Zanini Verfahren zur herstellung von endlosen profilleisten, insbesondere fuer jalousien oder fensterrahmen
EP0210297A1 (fr) * 1985-08-02 1987-02-04 Schock & Co. GmbH Procédé et dispositif pour l'enduction par extrusion en continu de profilés en bois avec une matière thermoplastique
US5819458A (en) * 1995-09-29 1998-10-13 Hadden; David M. Reinforced picture frame moulding
US6066680A (en) * 1996-05-16 2000-05-23 Marley Mouldings Inc. Extrudable composite of polymer and wood flour
US6254369B1 (en) * 1998-10-16 2001-07-03 Daniel M. Kelly Extrusion die for forming a skin on reusable construction material for concrete forms
US6336265B1 (en) * 1999-05-05 2002-01-08 Siegfried Niedermair Composite railroad cross tie and method of manufacturing same
EP1250995A1 (fr) * 2000-01-26 2002-10-23 Sekisui Chemical Co., Ltd. Article moule a partir d'une matiere composite thermoplastique et procede de production dudit article

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO340414B1 (no) * 2014-12-22 2017-04-18 Hallingplast As Stolpe omfattende en trekjerne som på sin ytterside er påført en kontinuerlige beskyttelseskappe, samt fremgangsmåte for fremstilling av en slik stolpe.
CN111805865A (zh) * 2020-09-02 2020-10-23 临朐瑞星塑胶制品有限公司 一种阻燃胶条成型模具

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