WO1998024614A1 - Procede servant a façonner des articles ornementes en plastique - Google Patents

Procede servant a façonner des articles ornementes en plastique Download PDF

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Publication number
WO1998024614A1
WO1998024614A1 PCT/GB1997/003011 GB9703011W WO9824614A1 WO 1998024614 A1 WO1998024614 A1 WO 1998024614A1 GB 9703011 W GB9703011 W GB 9703011W WO 9824614 A1 WO9824614 A1 WO 9824614A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
hot stamp
plastics
extrusion
forming
Prior art date
Application number
PCT/GB1997/003011
Other languages
English (en)
Inventor
Robert Detenon
Original Assignee
Robobond Limited
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
Priority claimed from GBGB9625192.1A external-priority patent/GB9625192D0/en
Application filed by Robobond Limited filed Critical Robobond Limited
Priority to AU47903/97A priority Critical patent/AU4790397A/en
Publication of WO1998024614A1 publication Critical patent/WO1998024614A1/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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
    • B29C44/5636—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching with the addition of heat
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • 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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/722—Decorative or ornamental articles

Definitions

  • the present invention relates to a method of forming ornamented plastics articles and to articles formed by the method and relates especially but not exclusively to manufacture of items of furniture, building components and picture frame members.
  • Plastics materials have been used widely throughout the furniture and building industries for many years whether it be in the form of, for example, the flexible plastics sheet upholstery covers or stuffed flexible plastic foam upholstery filling of sofa suites, the substantially rigid mouldings of diner or patio plastics chairs or the completely rigid hard plastics tops of patio tables.
  • a method of forming ornamented plastics articles which comprises firstly extruding plastics material and then re-moulding it in a hot stamp press
  • a hydraulic press of a metre or longer in length and suitably of the order of four metres in length is ideally provided for the second stage of the forming process to enable sizeable furniture or building components to be formed by the technique
  • Embodiments of the invention may comprise use of a hydraulic press of even four metres in length This may be particularly useful for such items as cornices, dado rails and coving Indeed, it is with the longest extrusions that the greatest cost advantage is achieved over injection moulding
  • plastics materials for use in the invention include polyvinylchloride and polystyrene
  • plastics material is extruded as a foam and suitably comprises foamed polystyrene or foamed PVC
  • the pressing of the plastics extrusion may be carried out on or off line, ie with the press physically positioned immediately after the extruder to press the plastics extrusion before it is cut and transported elsewhere or first cut and then transported to a nearby hydraulic press
  • the hydraulic press is suitably mounted on wheels or other transport means and powered to move with the advancing extrusion until the pressing step is complete.
  • the hot stamp press is provided with a removable cutting tool which enables the extrusion to be cut during pressing by the hot stamp press.
  • the plastics material is cut at substantially the same time as the re-moulding in the hot stamp press.
  • Figure 1 is a longitudinal elevation view of an on-line assembly of extruder and heated press
  • Figure 2 is a transverse sectional view of the heated press taken along the line II - II in Figure 1;
  • Figure 3 is a top view of an edge-cut extrusion, showing the material to be removed.
  • Figure 4 is a schematic diagram indicating how two finished products can be pressed and cut from a single extrusion. Description of the Preferred Embodiment
  • the production line assembly comprises firstly an extruder 1 from which foamed polystyrene or other plastics material is continuously extruded.
  • the extrusion 2 is destined to become a series of picture frame members and has a generally rectangular cross- section with a depth of between 1 and 3 centimetres and a width of 4 to 8 centimetres and with a rebate 3 along one edge intended to accommodate a picture and glazing panel.
  • the outer, in use, (upper, as shown) face 4 of the extrusion 2 is to be ornamented.
  • a four metre long hot stamp press 5 being a hydraulic press having an underlying support platen 6 and an overhanging die 7 configured to stamp the desired detail of ornamentation into the upper face 4 of the extrusion 2.
  • Both the platen 6 and die 7 are heated, suitably electrically under thermo-static control.
  • Careful control of the temperature gradient across the extrusion 2 enables an inherent tendency of the extrusion 2 to bow upwardly to be counteracted. More particularly, heating of the platen 6 preferably by use of heated oil circulating through it or by electric heating, counteracts the upward bowing tendency of the extrusion 2 under pressure. Generally, the greater the depth of impression to be made onto the extrusion 2 the greater the tendency to bow and the greater the temperature of the platen 6 needs to be to counteract this.
  • the precise temperatures and pressures and compression times within the hot stamp press 5 are selected to suit the nature of the extrusion to be ornamented and the depth of ornamentation.
  • the required temperature, pressure and time are generally substantially lower than for corresponding injection moulding technique and, therefore, the energy input required is relatively low.
  • Temperatures of between 100 and 180°C are not untypical and compression times are generally between 10 and 40 seconds with pressures of the order of, for example, 5 to 10 bars per square centimetre.
  • Temperatures below 140°C are preferable when compression times of greater than 60 seconds are used, to avoid risk of edge damage to the moulding and to avoid reblowing of the original blowing agent
  • the preferred size of the press 5 is of the order of 3 m in length and 70cm width This enables, for example, three or four picture frame members to be pressed simultaneously alongside each other
  • a press of 70cm width is also well-suited to moulding of, for example, a cabinet door which is commonly 60cm in width
  • the hot stamp die 5 is adapted to advance with the extrusion 2 at the same rate as the extrusion 2 by means of motorised transport carriage 8 with wheels 9 that roll along a track 10 co-extensive with the production line
  • a positive benefit can be obtained by pressing the extrusion 2 shortly after it is extruded most especially when it is of a foamed nature since this assists in the ease of pressing and reduction of need for energy inputs at the pressing stage
  • hot stamp pressing of extrusions provides a distinctive somewhat distressed surface characteristic This is most notable with "gold" or otherwise wood-coloured plastics which upon heating in the hot stamp press 5 are slightly facially burnt The result of this effect is generally aesthetically desirable rendering the plastics material with an appearance similar to wood and, therefore, better disguising the artificiality of the material.
  • hot stamp foil as is commonly used in the picture frame manufacturing industry for adorning plastics extrusions with transfer patterns, can be conveniently applied to the moulding actually within the hot stamp press 5 avoiding the need for a separate application process.
  • the hot stamp foil is reeled through the hot stamp press 5 with rollers being positioned at the entrance and exit to the press 5 so that the transfer foil passes over their rounded surfaces and is not accidentally pierced
  • the rollers or additional rollers may act as spindles to remove the used foil tape and to pick up the slack.
  • the foil is suitably laid against the plastics extrusion prior to the press 5 being operated to press down upon it.
  • the hot stamp press 5 is provided with a removable cutting edge which enables excess material to be cut from the extrusions so as to form an ornamented edge as shown in Figure 3.
  • the hot stamp pressing and cutting to remove excess material occur in one single stage, thus providing an ornamented extrusion having both a pressed, ornamented surface pattern and an ornamented cut edge
  • Excess material 15 is removed after the pressing and cutting operation and can be reclaimed and reused.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Detergent Compositions (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé servant à façonner des articles ornementés en plastique, ainsi que des articles façonnés au moyen de ce procédé et concerne spécialement, quoique non exclusivement, la fabrication d'articles d'ameublement, d'éléments de construction et d'éléments de cadres de tableaux. Ce procédé consiste à d'abord extruder un article en plastique, puis à le remouler dans une presse d'estampage à chaud (5). Ceci permet de fabriquer des formes extrêmement complexes d'articles présentant des dimensions importantes, à un coût beaucoup moins élevé que celui de l'état actuel de la technique.
PCT/GB1997/003011 1996-12-04 1997-11-03 Procede servant a façonner des articles ornementes en plastique WO1998024614A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU47903/97A AU4790397A (en) 1996-12-04 1997-11-03 Method of forming ornamented plastics articles

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9625192.1 1996-12-04
GBGB9625192.1A GB9625192D0 (en) 1996-12-04 1996-12-04 Method of forming ornamented plastics articles
GBGB9708151.7A GB9708151D0 (en) 1996-12-04 1997-04-22 Method of forming ornamented plastics articles
GB9708151.7 1997-04-22

Publications (1)

Publication Number Publication Date
WO1998024614A1 true WO1998024614A1 (fr) 1998-06-11

Family

ID=26310547

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/003011 WO1998024614A1 (fr) 1996-12-04 1997-11-03 Procede servant a façonner des articles ornementes en plastique

Country Status (4)

Country Link
AU (1) AU4790397A (fr)
CA (1) CA2207313A1 (fr)
GB (2) GB9708151D0 (fr)
WO (1) WO1998024614A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100376212B1 (ko) * 2000-06-26 2003-03-15 김희경 플라스틱 표면의 무광처리방법

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395995A (fr) * 1964-03-26 1965-04-16 Procédé pour la fabrication de moulures décoratives ayant l'aspect du bois
FR1401394A (fr) * 1964-04-22 1965-06-04 Mecanique & Plastique Charnière en matière plastique et procédé de fabrication d'une telle charnière
US4327049A (en) * 1980-02-14 1982-04-27 Miller Frederick O Method of forming automotive headliners from composite foamed resin blanks
GB2195940A (en) * 1986-10-03 1988-04-20 Polistock Nv Molding laminated panels
US4925512A (en) * 1982-06-11 1990-05-15 Sonoco Gunther S.A. Method for continuously manufacturing products of thermoplastic material and equipment for carrying out said method
WO1992000177A1 (fr) * 1990-06-23 1992-01-09 Pebra Gmbh Paul Braun Procede et installation de production de pieces moulees en matieres plastiques reactionnelles reticulees
DE4228194A1 (de) * 1992-08-25 1994-03-03 H P Chemie Pelzer Res & Dev Verfahren zur Herstellung von dekorfähigen Formteilen
FR2698578A1 (fr) * 1992-11-27 1994-06-03 Profil Procédé et installation de fabrication en continu de pièces composites et pièces composites obtenues par ce procédé.
US5401154A (en) * 1993-05-26 1995-03-28 Continental Structural Plastics, Inc. Apparatus for compounding a fiber reinforced thermoplastic material and forming parts therefrom
EP0686476A2 (fr) * 1994-06-07 1995-12-13 LIGNOTOCK GmbH Procédé et appareil pour la fabrication d'un objet revêtu

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2200112A1 (fr) * 1972-09-19 1974-04-19 Brauning Helmut
US4489019A (en) * 1981-12-22 1984-12-18 Aisin Seiki Kabushiki Kaisha Method for producing a longitudinal molding with nonuniform sections
GB2225275B (en) * 1989-02-04 1991-05-08 Meirion Gribble Slate-filled resin products
US5508103A (en) * 1995-01-30 1996-04-16 Marley Mouldings Inc. Extrusion product with decorative enhancement and process of making the same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395995A (fr) * 1964-03-26 1965-04-16 Procédé pour la fabrication de moulures décoratives ayant l'aspect du bois
FR1401394A (fr) * 1964-04-22 1965-06-04 Mecanique & Plastique Charnière en matière plastique et procédé de fabrication d'une telle charnière
US4327049A (en) * 1980-02-14 1982-04-27 Miller Frederick O Method of forming automotive headliners from composite foamed resin blanks
US4925512A (en) * 1982-06-11 1990-05-15 Sonoco Gunther S.A. Method for continuously manufacturing products of thermoplastic material and equipment for carrying out said method
GB2195940A (en) * 1986-10-03 1988-04-20 Polistock Nv Molding laminated panels
WO1992000177A1 (fr) * 1990-06-23 1992-01-09 Pebra Gmbh Paul Braun Procede et installation de production de pieces moulees en matieres plastiques reactionnelles reticulees
DE4228194A1 (de) * 1992-08-25 1994-03-03 H P Chemie Pelzer Res & Dev Verfahren zur Herstellung von dekorfähigen Formteilen
FR2698578A1 (fr) * 1992-11-27 1994-06-03 Profil Procédé et installation de fabrication en continu de pièces composites et pièces composites obtenues par ce procédé.
US5401154A (en) * 1993-05-26 1995-03-28 Continental Structural Plastics, Inc. Apparatus for compounding a fiber reinforced thermoplastic material and forming parts therefrom
EP0686476A2 (fr) * 1994-06-07 1995-12-13 LIGNOTOCK GmbH Procédé et appareil pour la fabrication d'un objet revêtu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100376212B1 (ko) * 2000-06-26 2003-03-15 김희경 플라스틱 표면의 무광처리방법

Also Published As

Publication number Publication date
GB2319982A (en) 1998-06-10
GB9723009D0 (en) 1998-01-07
AU4790397A (en) 1998-06-29
CA2207313A1 (fr) 1998-06-04
GB9708151D0 (en) 1997-06-11

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