WO1992018341A1 - Preparation de moulages dont la surface imite la texture du bois - Google Patents

Preparation de moulages dont la surface imite la texture du bois Download PDF

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Publication number
WO1992018341A1
WO1992018341A1 PCT/GB1992/000734 GB9200734W WO9218341A1 WO 1992018341 A1 WO1992018341 A1 WO 1992018341A1 GB 9200734 W GB9200734 W GB 9200734W WO 9218341 A1 WO9218341 A1 WO 9218341A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
resin
colourant
colour
wood grain
Prior art date
Application number
PCT/GB1992/000734
Other languages
English (en)
Inventor
Aldino Albertelli
Original Assignee
Company 'a' Foam 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
Application filed by Company 'a' Foam Limited filed Critical Company 'a' Foam Limited
Publication of WO1992018341A1 publication Critical patent/WO1992018341A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F9/00—Designs imitating natural patterns
    • B44F9/02—Designs imitating natural patterns wood grain effects
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C37/0032—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
    • 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
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • 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
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/20—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C3/00—Processes, not specifically provided for elsewhere, for producing ornamental structures
    • B44C3/04—Modelling plastic materials, e.g. clay
    • B44C3/046—Modelling plastic materials, e.g. clay using a modelling surface, e.g. plate
    • B44C3/048—Modelling plastic materials, e.g. clay using a modelling surface, e.g. plate applying an additional decorative element, e.g. picture
    • 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
    • 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
    • B29L2031/724—Doors

Definitions

  • This invention relates to the production of synthetic resin moldings having a simulated wood grain surface.
  • the desired surface of the mold may be obtained, for example, by forming the mold against a suitable wooden surface.
  • the effect may be enhanced by causing the wooden surface to swell, e.g. by soaking it, prior to its use as the former.
  • the wood grain-like finish on the synthetic resin molding may be further improved by suitable pigmentation of the resin and/or by surface treatment. While the method is widely used and very good results may be obtained, there is still room for improvement in the quality of finish. Furthermore, the finishes currently obtained normally require at least two further treatments., namely staining and varnishing, in order to obtain an acceptable product, and these add significantly to the cost, especially since often more than one staining step is required. Moreover, the product recovered from the mold cannot be sanded because every scratch is highlighted in any subsequent staining treatment.
  • a process for forming a product with a surface of molded synthetic resin having a simulated wood grain finish which includes the step of effecting contact between a surface of a oldable body of curable synthetic resin and a mold surface designed to form the simulated wood grain effect on said resin surface, wherein prior to effecting said contact, a part or all of the mold surface is coated with a colourant, such as a pigment or dye, having a colour which is different from the colour of the resin when cured, and which is transferred to the surface of the curable resin when contact is effected and retained on said surface when the molding is parted from the mold.
  • a colourant such as a pigment or dye
  • the coating of the mold surface with the colourant is restricted to parts, only, of the mold surface.
  • the coating may be restricted to the higher areas so that on transfer to the molding it is concentrated in the lower areas or valleys of the surface of the molding.
  • the coating is not limited to the higher areas of the mold surface, e.g. where the whole surface of the mold is coated, it may be advantageous to treat the face of the molding so obtained to remove colourant selectively from parts of the surface; for example colourant may be removed from high points by abrasion, such as sanding. (In the process of this invention, sanding the molded product is not unacceptable because the product does not have to be stained after removal from the mold) .
  • the colourant e.g. pigment or dye
  • a suitable liquid medium which may be aqueous or non-aqueous; e.g. an ink.
  • Application may be by spraying, wiping e.g. with a cloth, or any other suitable or convenient method.
  • a pigment is employed in suspension in a liquid medium the latter may suitably include a binder.
  • the choice of material employed to carry the colourant will affect the distribution of the deposit. For example, if a relatively stiff pad is employed, depositions will tend to be limited to the peaks of the mold surface whereas a softer pad or cloth will deposit the colourant over a wider area.
  • the deposition of colourant in the mold surface is achieved by wiping the surface with a carbon paper, coloured transfer paper or stiff pad coated with pigment.
  • this method will tend selectively to coat high points and possibly also shallow valleys of the molding but the lower parts of relatively narrow valleys will tend to remain uncoated.
  • a powder or solution or dispersion, e.g. ink is applied with a cloth, the amount of surface coated will depend upon the choice of cloth and in particular its softness. With softer cloths, smaller proportions of the area, generally the deeper zone of the narrower valleys, will be left uncoated.
  • Spraying is a suitable procedure for coating the entire, or substantially entire, surface; however, it may be used also for coating selected areas, e.g. by use of masks.
  • Two or more different colours may be applied.
  • the whole surface may be coated with a first colour and then parts of the surface, e.g. the high points, selectively coated with a second colour.
  • the first colour may be removed from the high points, e.g. by wiping, before the second colour is applied.
  • the first colour may be applied so that, for example, high points and wide valleys are coated, but not the deeper zones of narrow valleys.
  • the molded product will then have a surface exhibiting three different colours. Further variations may be achieved by selective removal of the colour or colours from the resultant molding, e.g. by sanding the high points.
  • the effect varies with the kind of wood grain surface simulated by the mold, the colour of the dye or pigment and the colour of the resin and the best results for any particular combination require trial and experiment.
  • a mold release agent will be applied to the surface of the mold prior to application of the colourant. In some cases, this will result in transfer of mold release agent to the surface of the molding and this transfer may be enhanced by the presence of the colourant. Where this occurs, the surface of the product can be provided with an attractive sheen by polishing.
  • the pigment or dye may be incorporated into the body of the resin as well as on to the surface, thereby providing a finish which is more resistant to damage.
  • Figure 1 shows, in diagra atic and much enlarged form, a cross-section of a part of a mold whose surface is coated with pigment in accordance with the invention
  • Figure 2 shows in cross-section the surface of a molding obtained using the mold of Figure 1
  • Figure 3 is a photograph of a surface obtained by the process of the invention.
  • the mold is obtained by casting a suitable mold-forming material, e.g. polyester, polyurethane elastomer or silicone rubber, against the surface of a sheet of wood in which preferably the surface grain has been exaggerated by previously soaking the surface of the wood in water to cause it to swell.
  • a suitable mold-forming material e.g. polyester, polyurethane elastomer or silicone rubber
  • pigment 8 is applied to the mold surface.
  • it is applied to parts of the surface, specifically the higher areas and some parts of the shallower valleys.
  • the coating is effected e.g. by wiping the surface with a carbon paper of a chosen colour or by applying powdered pigment with a cloth pad.
  • a layer of curable synthetic resin e.g. polyester, having a colour which is a contrast to the pigment 8 is applied to the mold surface preferably with the application of pressure to ensure good contact, and is allowed to remain in contact with the mold surface until cure of the resin is substantially complete.
  • the pigment 8 is transferred to the resin surface, producing the molding 10 illustrated in Figure 2, comprising resin layer 12 parts of the surface, and principally valley areas, of which are coated or impregnated with pigment 8.
  • the resin layer may be the external layer of a complex molding which may, for example, include further backing layers of resin at least one of which may include filler and/or fibrous reinforcement.
  • the molding having the resin layer as an outer face may also include one or more preforms such as of blocks of wood or rigid plastics foam which are located behind and bonded to the resin layer or layers.
  • a typical surface obtained by the process of the invention using black pigment and a pale yellow or beige colored polyester resin is illustrated in Figure 3-
  • the wood grain effect on the surface of the molding of the invention is closer to the real thing than that produced by a corresponding process without the use of pigment and the product of the invention does not require staining prior to varnishing.
  • Yet a further advantage of the invention is that the need for staining is avoided although the product may be stained if desired.
  • Another advantage is that the product more readily accepts stains and varnishes. This is believed to be due to the presence on or in the resin surface of pigment particles which enhances the ability of the surface to absorb the stain or varnish.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Pour obtenir des moulages en résine synthétique, par exemple des panneaux et portes, dotés d'une finition améliorée imitant la texture du bois on applique à toute ou partie de la surface du moule au moins une matière colorante, dont la couleur est différente de celle de la résine une fois polymérisée, avant de mettre la surface du moule en contact avec la surface d'un corps moulable en résine synthétique polymérisable, la matière colorante étant transférée à la surface de la résine polymérisable au moment de la mise en contact et étant retenue par celle-ci lorsque le moulage est séparé du moule.
PCT/GB1992/000734 1991-04-22 1992-04-22 Preparation de moulages dont la surface imite la texture du bois WO1992018341A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9108569.6 1991-04-22
GB919108569A GB9108569D0 (en) 1991-04-22 1991-04-22 Forming moldings with simulated wood grain surfaces

Publications (1)

Publication Number Publication Date
WO1992018341A1 true WO1992018341A1 (fr) 1992-10-29

Family

ID=10693705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/000734 WO1992018341A1 (fr) 1991-04-22 1992-04-22 Preparation de moulages dont la surface imite la texture du bois

Country Status (6)

Country Link
AU (1) AU1573592A (fr)
GB (1) GB9108569D0 (fr)
IE (1) IE921277A1 (fr)
MX (1) MX9201862A (fr)
WO (1) WO1992018341A1 (fr)
ZA (1) ZA922915B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT183U1 (de) * 1993-07-05 1995-04-25 Moser Andreas Peter Moser Andr Verfahren zur behandlung von oberflaechen, insbesondere holzoberflaechen
WO1995012496A1 (fr) * 1993-11-03 1995-05-11 Limbridges Limited Formation de pieces moulees dotees d'une surface imitant le grain du bois
ES2154597A1 (es) * 1999-07-08 2001-04-01 Argapref S L Procedimiento de fabricacion de moldes para canecillos y tableros de aleros en hormigon de imitacion a madera y moldes y piezas asi obtenidos.
EP1935603A1 (fr) 2006-12-21 2008-06-25 LSSD UK Limited Procédés de formation d'enveloppe extérieure de porte

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641228A (en) * 1968-09-18 1972-02-08 Urethane Fabricators Inc Method of producing a molded simulated wooden article
US4066805A (en) * 1976-02-23 1978-01-03 Armstrong Cork Company Method of achieving a two-toned fiberboard product
FR2469263A1 (fr) * 1979-11-09 1981-05-22 Declercq Raymond Procede de moulage pour un produit presentant un relief
GB2172848A (en) * 1985-03-29 1986-10-01 Joel Harry Johnson Method of producing boards or panels faced with glass reinforced polyester

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641228A (en) * 1968-09-18 1972-02-08 Urethane Fabricators Inc Method of producing a molded simulated wooden article
US4066805A (en) * 1976-02-23 1978-01-03 Armstrong Cork Company Method of achieving a two-toned fiberboard product
FR2469263A1 (fr) * 1979-11-09 1981-05-22 Declercq Raymond Procede de moulage pour un produit presentant un relief
GB2172848A (en) * 1985-03-29 1986-10-01 Joel Harry Johnson Method of producing boards or panels faced with glass reinforced polyester

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT183U1 (de) * 1993-07-05 1995-04-25 Moser Andreas Peter Moser Andr Verfahren zur behandlung von oberflaechen, insbesondere holzoberflaechen
WO1995012496A1 (fr) * 1993-11-03 1995-05-11 Limbridges Limited Formation de pieces moulees dotees d'une surface imitant le grain du bois
US6093356A (en) * 1993-11-03 2000-07-25 Acell Holdings Limited Forming moulding with simulated wood grain surface
ES2154597A1 (es) * 1999-07-08 2001-04-01 Argapref S L Procedimiento de fabricacion de moldes para canecillos y tableros de aleros en hormigon de imitacion a madera y moldes y piezas asi obtenidos.
EP1935603A1 (fr) 2006-12-21 2008-06-25 LSSD UK Limited Procédés de formation d'enveloppe extérieure de porte

Also Published As

Publication number Publication date
ZA922915B (en) 1993-04-28
AU1573592A (en) 1992-11-17
MX9201862A (es) 1992-10-01
IE921277A1 (en) 1992-11-04
GB9108569D0 (en) 1991-06-05

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