WO1999024232A1 - Process and tooling for decorative molded plastic products - Google Patents

Process and tooling for decorative molded plastic products Download PDF

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Publication number
WO1999024232A1
WO1999024232A1 PCT/CA1998/001045 CA9801045W WO9924232A1 WO 1999024232 A1 WO1999024232 A1 WO 1999024232A1 CA 9801045 W CA9801045 W CA 9801045W WO 9924232 A1 WO9924232 A1 WO 9924232A1
Authority
WO
WIPO (PCT)
Prior art keywords
skin
vacuum
wall portion
tooling
mold
Prior art date
Application number
PCT/CA1998/001045
Other languages
French (fr)
Inventor
Herbert K. Hoedl
Eufredo Maury
Dave Cockle
Original Assignee
Royal Ecoproducts 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 Royal Ecoproducts Limited filed Critical Royal Ecoproducts Limited
Priority to AU11375/99A priority Critical patent/AU1137599A/en
Publication of WO1999024232A1 publication Critical patent/WO1999024232A1/en

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
    • 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
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B29C43/183—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
    • 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
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29K2105/26—Scrap or recycled material

Definitions

  • This invention relates to a novel process in tooling for producing products of predetermined shape which have an outer skin with predetermined properties regarding its function and appearance and a body with different properties such as mechanical strength, weight, dimensional stability, nailability, stiffness, elasticity and the like.
  • the invention also relates to products produced by such novel process in tooling.
  • Products having a decorative and/or functional film covering a support body are known in the art. Such products are conventionally manufactured by first producing the desired decorative and/or functional film of a suitable plastic material in a vacuum forming process. The resulting film is then transferred into a compression or injection molding tool. The material to form the body component of the product is then loaded or injected into the tool and molded to the film or skin.
  • both the vacuum forming and the compression or injection molding tooling must be dedicated tooling and the vacuum formed film or skin must be transported between tooling.
  • This requirement for handling and transfer between tooling gives rise to at least some degree of shrinkage of the film and oxidation or contamination of the film surfaces before it is inserted into the compression or injection molding tooling where the hot or softened charge of material which is to form the body component of the product is introduced into the mold tool.
  • the body material cools and exhibits shrinkage, it tends to cause separation from the previously shrunk skin adversely affecting the resulting bond between the skin and body component. Any contamination of the skin surface at the interface between the skin and body component further adversely affects the body to skin bond.
  • adhesion promoters often become necessary to achieve an acceptable interface adhesion.
  • Twin sheet vacuum forming to form hollow parts similar to blow moldings is also known in the art to provide a desired decorative and functional skin. All tooling, however, is dedicated vacuum forming tools and, if these hollow components are to filled with a body material such as a foam material, this filling is done in a separate process.
  • the present invention is directed to overcoming the disadvantageous of the prior art process tooling and products formed therefrom. More particularly, the invention resides in providing for the vacuum forming of the desired decorative and functional skin in situ in the compression or injection molding tooling prior to the introduction of the molten or softened material which is to form the body of the component into the tooling, then introducing such material and forcing same under pressure against the in situ previously vacuum formed skin. With the vacuum formed skin in place within the compression or injection molding tooling, the molding of the body component can be carried out before any significant shrinkage or contamination of the skin takes place whereby an extremely positive bond between the skin and body component is effected.
  • the invention further provides for novel tooling for carrying out the process and novel products produced by the process and tooling.
  • Figure 1 is a cross sectional view of the cavity side of a very simple compression molding tool modified to provide vacuum ports through the bottom wall thereof and showing a film of thermoplastic material clamped in position preparatory to being vacuum formed.
  • Figure 2 shows the cavity mold component of Figure 1 after the film has been vacuum formed to conform to the configuration of the bottom wall of the cavity mold member.
  • Figure 3 illustrates the further step in which after the film has been vacuum formed as shown in Figure 2 a charge of molten or softened material which is to form the body component of the molding has been introduced on top of the vacuum formed skin and showing the core side of the tooling in position to compress the charge of body material.
  • Figure 4 illustrates the subsequent step in which the core side of the mold tool has compressed the charge of body material against the vacuum formed skin.
  • Figure 5 is a perspective view illustrating the product formed by the steps illustrated in Figures 1 to 4.
  • a plurality of grooves 6 are formed in the bottom wall 3 each of these grooves being connected with one of the vacuum ports 2.
  • a film or sheet 7 of heated thermoplastic material is clamped over the cavity 4 by clamps 8 preparatory to applying vacuum through a suitable vacuum source, not shown, through the vacuum ports 2.
  • the film or sheet 7 can be made of various materials and compositions and may comprise a composite sheet made up of multi-layer films.
  • the exposed side of the film may be coloured for decoration or may have a non-skid surface and the film or sheet may include desired additives such as those offering ultraviolet light protection or impact resistance.
  • the outer skin 7 is made from relatively expensive raw materials utilizing virgin materials to provide the requisite decorative and functional qualities.
  • Figure 3 illustrates the introduction into the cavity mold side 1 of a charge of molten or heated material 9 and showing the core side 10 of the tooling ready to compress this charge of material against the vacuum formed skin 7 designated as 7v.
  • the charge of molten or softened material 9 preferably comprises inexpensive recycled thermoplastic materials highly loaded with even more economical fillers and reinforcements such as organic fibers such as wood fibers, sugar cane, corn, flax, jute, paper and the like and/or inorganic components such as fly ash, corral sand, or other organic or inorganic components such as rubber, thermosets, including glass fibers and calcium carbonate. It will be understood that the sole function of the body is to provide for certain mechanical properties such as stiffness, elasticity, nailability or other functions such as high or low weight.
  • Figure 5 illustrates the core side 10 having applied a compressive force to spread and compress the charge of material 9 compressed against the vacuum formed skin 7v under high compressive forces into the shape 9c while the skin 7v remains in situ.
  • the charge of body material 9 can be introduced immediately before any, or any significant, oxidation of the upper surface 7'v can occur and before any, or any significant, cooling and shrinkage of the vacuum formed film 7v has occurred.
  • vacuum may be continued through the vacuum ports 2 during the compression molding of the body material 9 to the desired shape 9c to maintain the vacuum formed film 7v until there is a compressive force built up against the film by the relative closure of the mold.
  • the contact of the molten or hot softened body material 9 with the vacuum formed skin 7v immediately transforms heat to the skin 7v to raise its temperature towards the temperature of the material 9 as this material is compressed into the desired shape 9c. Thereafter, both the skin 7v and the body material 9 cool together and being intimately bonded at the interface their shrinkage is mutually controlled eliminating the problem associated with shrink stress separation occurring in existing processes.
  • the molded composite product comprising the skin 7v and the pressure molded body 9c is removed from the mold and forms the product P illustrated in Figure 5.
  • the invention has been described in conjunction with a modified compression mold tooling in which the cavity side 1 has been provided with the vacuum ports 2 for producing the vacuum formed skin 7v. It will be appreciated that the core side 10 of the tool can also be modified to provide vacuum ports (not shown) for vacuum forming a skin adhered to the underside thereof.
  • both the cavity side 1 and the core side 2 of the tooling are modified to provide for vacuum formed skins on both sides of the molding tool, then on completion of the molding operation the molded body 9c will be totally encapsulated in an outer skin having the desired decorative and functional properties.
  • the principle involved can be applied equally to modify injection molding tooling where again a skin of suitable material is vacuum formed within one or more of the parts of the injection molding tool after which the tool is closed and the normal injection molding of the appropriate molten or heated softened body material such as described above is injected into the mold and delivered under pressure against the previously in situ vacuum molded skin or skins.
  • injection molding step should be taken immediately after the vacuum forming of the skin or skins in situ in the molding tool to avoid problems of contamination and oxidation of the vacuum formed skin or skins and to effect the mutually controlled shrinkage of the bonded body and skin components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A process for producing a product of predetermined shape having an outer skin (7v) with predetermined properties covering at least a portion of a molded body of material having predetermined properties different from said skin, the process comprising vacuum forming a thermoplastic skin (7v) selected for its properties against the surface of a vacuum ported wall (2) portion of molding tooling (5) configured to mold the product shape to conform the skin to the surface and seal off the vacuum ported wall (2) portion, introducing a charge of molten or softened body material (9) into the molding tooling (5) and molding the molten or softened body material while forcing same under pressure against the vacuum formed skin (7v), and after cooling opening the mold tooling and removing said product. The invention also relates to mold tooling (5) for carrying out the process.

Description

PROCESS AND TOOLING FOR DECORATIVE MOLDED PLASTIC PRODUCTS
FIELD OF THE INVENTION
This invention relates to a novel process in tooling for producing products of predetermined shape which have an outer skin with predetermined properties regarding its function and appearance and a body with different properties such as mechanical strength, weight, dimensional stability, nailability, stiffness, elasticity and the like.
The invention also relates to products produced by such novel process in tooling.
BACKGROUND OF THE INVENTION
Products having a decorative and/or functional film covering a support body are known in the art. Such products are conventionally manufactured by first producing the desired decorative and/or functional film of a suitable plastic material in a vacuum forming process. The resulting film is then transferred into a compression or injection molding tool. The material to form the body component of the product is then loaded or injected into the tool and molded to the film or skin.
As presently manufactured, both the vacuum forming and the compression or injection molding tooling must be dedicated tooling and the vacuum formed film or skin must be transported between tooling. This requirement for handling and transfer between tooling gives rise to at least some degree of shrinkage of the film and oxidation or contamination of the film surfaces before it is inserted into the compression or injection molding tooling where the hot or softened charge of material which is to form the body component of the product is introduced into the mold tool. Thus, when the body material cools and exhibits shrinkage, it tends to cause separation from the previously shrunk skin adversely affecting the resulting bond between the skin and body component. Any contamination of the skin surface at the interface between the skin and body component further adversely affects the body to skin bond. As a result, adhesion promoters often become necessary to achieve an acceptable interface adhesion.
Twin sheet vacuum forming to form hollow parts similar to blow moldings is also known in the art to provide a desired decorative and functional skin. All tooling, however, is dedicated vacuum forming tools and, if these hollow components are to filled with a body material such as a foam material, this filling is done in a separate process.
It is also known to provide outer surfaces having limited decorative and functional characteristics by placing an elastic film having high elongation properties in a compression or injection mold and utilizing the pressure of the compressed or injected material to force the elastic film against one side of the mold tool to adapt the film to its surface.
All of these known processes have one or more serious limitations such as the need for dedicated tooling, the need for multiple processing steps, limited decorative or functional qualities, and inadequate or limited bonding between the decorative or functional surfaces and the body material.
SUMMARY OF THE INVENTION
The present invention is directed to overcoming the disadvantageous of the prior art process tooling and products formed therefrom. More particularly, the invention resides in providing for the vacuum forming of the desired decorative and functional skin in situ in the compression or injection molding tooling prior to the introduction of the molten or softened material which is to form the body of the component into the tooling, then introducing such material and forcing same under pressure against the in situ previously vacuum formed skin. With the vacuum formed skin in place within the compression or injection molding tooling, the molding of the body component can be carried out before any significant shrinkage or contamination of the skin takes place whereby an extremely positive bond between the skin and body component is effected.
The invention further provides for novel tooling for carrying out the process and novel products produced by the process and tooling.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a cross sectional view of the cavity side of a very simple compression molding tool modified to provide vacuum ports through the bottom wall thereof and showing a film of thermoplastic material clamped in position preparatory to being vacuum formed.
Figure 2 shows the cavity mold component of Figure 1 after the film has been vacuum formed to conform to the configuration of the bottom wall of the cavity mold member.
Figure 3 illustrates the further step in which after the film has been vacuum formed as shown in Figure 2 a charge of molten or softened material which is to form the body component of the molding has been introduced on top of the vacuum formed skin and showing the core side of the tooling in position to compress the charge of body material.
Figure 4 illustrates the subsequent step in which the core side of the mold tool has compressed the charge of body material against the vacuum formed skin.
Figure 5 is a perspective view illustrating the product formed by the steps illustrated in Figures 1 to 4. DETAILED DESCRIPTION ACCORDING TO THE PREFERRED EMBODIMENTS OF THE PRESENT INVENTION
The invention for simplicity will be described in connection with very simple compression molding type tooling by way of illustration only and it will be appreciated that it is equally applicable to injection type molding tooling.
As illustrated in Figure 1 what would otherwise be a conventional cavity side one of a conventional compression molding tool or tooling has been modified to provide a series of vacuum ports or passages 2 extending through the bottom wall 3 of the cavity 4 presented by the cavity side tool part 1 it being understood that this cavity 4 is enclosed by the surrounding wall 5.
A plurality of grooves 6 are formed in the bottom wall 3 each of these grooves being connected with one of the vacuum ports 2.
In carrying out the molding operation, as illustrated in Figure 1 , a film or sheet 7 of heated thermoplastic material is clamped over the cavity 4 by clamps 8 preparatory to applying vacuum through a suitable vacuum source, not shown, through the vacuum ports 2.
As illustrated in Figure 2, on the application of the vacuum the hot sheet or film 7 is drawn down against the bottom wall 3 that is vacuum formed to conform to the bottom wall 3 at which point it closes off the vacuum ports 2.
The film or sheet 7 can be made of various materials and compositions and may comprise a composite sheet made up of multi-layer films. The exposed side of the film may be coloured for decoration or may have a non-skid surface and the film or sheet may include desired additives such as those offering ultraviolet light protection or impact resistance. Typically the outer skin 7 is made from relatively expensive raw materials utilizing virgin materials to provide the requisite decorative and functional qualities.
Figure 3 illustrates the introduction into the cavity mold side 1 of a charge of molten or heated material 9 and showing the core side 10 of the tooling ready to compress this charge of material against the vacuum formed skin 7 designated as 7v.
The charge of molten or softened material 9 preferably comprises inexpensive recycled thermoplastic materials highly loaded with even more economical fillers and reinforcements such as organic fibers such as wood fibers, sugar cane, corn, flax, jute, paper and the like and/or inorganic components such as fly ash, corral sand, or other organic or inorganic components such as rubber, thermosets, including glass fibers and calcium carbonate. It will be understood that the sole function of the body is to provide for certain mechanical properties such as stiffness, elasticity, nailability or other functions such as high or low weight.
Figure 5 illustrates the core side 10 having applied a compressive force to spread and compress the charge of material 9 compressed against the vacuum formed skin 7v under high compressive forces into the shape 9c while the skin 7v remains in situ.
It will be understood that once the skin has been vacuum formed to the configuration of 7v the charge of body material 9 can be introduced immediately before any, or any significant, oxidation of the upper surface 7'v can occur and before any, or any significant, cooling and shrinkage of the vacuum formed film 7v has occurred. If desired, vacuum may be continued through the vacuum ports 2 during the compression molding of the body material 9 to the desired shape 9c to maintain the vacuum formed film 7v until there is a compressive force built up against the film by the relative closure of the mold. The contact of the molten or hot softened body material 9 with the vacuum formed skin 7v immediately transforms heat to the skin 7v to raise its temperature towards the temperature of the material 9 as this material is compressed into the desired shape 9c. Thereafter, both the skin 7v and the body material 9 cool together and being intimately bonded at the interface their shrinkage is mutually controlled eliminating the problem associated with shrink stress separation occurring in existing processes.
As a result of the fact that the compression molding takes place immediately after the vacuum forming of the skin 7v avoiding contamination and oxidation of the skin 7v and ensuring mutual interaction between this vacuum formed skin 7v and the body material 9 which has been molded into the shape 9c during cooling and shrinkage, a very positive bond is achieved between the shaped material 9c and skin 7v at the interface therebetween. This pressure fused essentially shrink stress free bond has been found to be significantly greater than the bond achieved by present processes.
After sufficient cooling, the molded composite product comprising the skin 7v and the pressure molded body 9c is removed from the mold and forms the product P illustrated in Figure 5.
The invention has been described in conjunction with a modified compression mold tooling in which the cavity side 1 has been provided with the vacuum ports 2 for producing the vacuum formed skin 7v. It will be appreciated that the core side 10 of the tool can also be modified to provide vacuum ports (not shown) for vacuum forming a skin adhered to the underside thereof.
It will be appreciated that if both the cavity side 1 and the core side 2 of the tooling are modified to provide for vacuum formed skins on both sides of the molding tool, then on completion of the molding operation the molded body 9c will be totally encapsulated in an outer skin having the desired decorative and functional properties. It will be understood that the principle involved can be applied equally to modify injection molding tooling where again a skin of suitable material is vacuum formed within one or more of the parts of the injection molding tool after which the tool is closed and the normal injection molding of the appropriate molten or heated softened body material such as described above is injected into the mold and delivered under pressure against the previously in situ vacuum molded skin or skins. As before, such injection molding step should be taken immediately after the vacuum forming of the skin or skins in situ in the molding tool to avoid problems of contamination and oxidation of the vacuum formed skin or skins and to effect the mutually controlled shrinkage of the bonded body and skin components.
It will be understood that variations in details of the molds and materials may be made without departing from the scope of the appended claims.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A process for producing a product of predetermined shape having an outer skin with predetermined properties covering at least a portion of a molded body of material having predetermined properties different from said skin, said process comprising vacuum forming a thermoplastic skin selected for its properties against the surface of a vacuum ported wall portion of molding tooling configured to mold said product shape to conform said skin to said surface and seal off said vacuum ported wall portion, introducing a charge of molten or softened body material into said molding tooling and molding said molten or softened body material while forcing same under pressure against said vacuum formed skin, and after cooling opening said mold tooling and removing said product.
2. A process as claimed in Claim 1 in which said charge of body material is introduced into said tooling immediately after vacuum forming said skin.
3. A process as claimed in Claim 2 in which said surface of said vacuum sorted wall portion has a design configuration to which said vacuum formed skin is conformed.
4. A process as claimed in Claims 1, 2 or 3 in which said skin is formed of virgin materials .
5. A process as claimed in Claim 1 , 2 or 3 in which said skin is made up of multi-layer films.
6. A process as claimed in Claim 1, 2 or 3 in which said body material comprises recycled thermoplastic materials incorporating particles selected from the group consisting of fillers and reinforcing constituents.
7. A process as claimed in Claim 1 , 2 or 3 in which said body material comprises recycled thermoplastic materials incorporating particles selected from the group consisting of organic fibers and inorganic materials.
8. A process as claimed in Claim 1 , 2 or 3 in which said body material comprises recycled thermoplastic materials incorporating particles selected from the group consisting of wood fibers, sugar cane, corn, flax, jute and paper.
9. A process as claimed in Claims 1, 2 or 3 in which said body material comprises recycled thermoplastic materials incorporating particles selected from the group consisting of rubber, thermosets, glass fibers, and calcium carbonate.
10. A compression mold having a cavity side and a core side, at least one of said sides having a wall portion having vacuum ports extending therethrough for vacuum forming a skin to conform to said wall portion.
11. A compression mold as claimed in Claim 10 in which said wall portion has a surface design for imparting said design to a skin conformed to said wall portion.
12. A compression mold as claimed in Claim 10 or 11 in which said vacuum ports extend through the wall of said cavity side.
13. A compression mold as claimed in Claim 10 or 11 in which said vacuum ports extend through the wall of said core side.
14. A compression mold as claimed in Claim 10 in which both said mold sides have a wall portion having vacuum ports extending therethrough for vacuum forming a skin to conform to each of said wall portions.
15. A compression mold as claimed in Claim 14 in which at least one of said wall portions has a surface design for importing said design to a skin conformed thereto.
16. Molding tooling configured to mold a desired three dimensional article having a skin covering at least a portion thereof, said tooling having at least one wall portion provided with ports therethrough to be connected to a vacuum source whereby a skin can be vacuum formed against said wall surface to close off said ports preparatory to molding said article.
17. An injection mold having mating sections at least one of said sections having a wall portion having vacuum ports extending therethrough for vacuum forming a skin to conform to said wall portion.
18. An injection mold as claimed in Claim 17 in which all of said mating sections have a wall portion having vacuum ports extending therethrough.
19. An injection mold as claimed in Claim 17 in which said at least one wall portion has a surface design for imparting said design to a skin vacuum formed to conform thereto.
20. An injection mold as claimed in Claim 18 in which at least one of said wall portions has a surface design for impacting said design to a skin vacuum formed to conform thereto.
21. A molded product comprising a molded body of moldable material having a predetermined shape and having at least a portion of the surface thereof covered with a thermoplastic skin, said skin being selected for its appearance and functional properties, said body and skin being bonded together by a pressure fused interface essentially free of shrinkage stress.
22. A molded product as claimed in Claim 21 in which said thermoplastic skin is formed of virgin materials.
23. A molded product as claimed in Claim 21 or 22 in which said skin comprises a multilayer film.
24. A molded product as claimed in Claim 21 in which said body material comprises recycled thermoplastic material containing particles of filler, recycled or waste material.
25. A molded product as claimed in Claim 21 , 22 or 23 in which said molded body is completely covered by said skin.
PCT/CA1998/001045 1997-11-12 1998-11-10 Process and tooling for decorative molded plastic products WO1999024232A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11375/99A AU1137599A (en) 1997-11-12 1998-11-10 Process and tooling for decorative molded plastic products

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,220,797 1997-11-12
CA 2220797 CA2220797A1 (en) 1997-11-12 1997-11-12 Process and tooling for decorative molded plastic products

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CA (1) CA2220797A1 (en)
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1226914A1 (en) * 2001-01-30 2002-07-31 An der Heiden, Dominik Method for producing plastic parts
EP1233135A1 (en) * 2001-01-30 2002-08-21 An der Heiden, Dominik Method for producing a plastic part with a frame
ITMO20100034A1 (en) * 2010-02-18 2011-08-19 Carlo Zacche PROCEDURE FOR MOLDING RUBBER DECORATIONS ON LEATHER ARTICLES AND OBTAINED LEATHER MANUFACTURED.
CN104647770A (en) * 2015-02-10 2015-05-27 华南理工大学 Method and device for manufacturing optical thin film having concave structures on surface
CN105058656A (en) * 2015-09-09 2015-11-18 李峰 Glass covering film manufacturing method
US9309031B2 (en) 2009-09-07 2016-04-12 The Procter & Gamble Company Bottle cap made from a material comprising polypropylene, particulate calcium carbonate and additives
CN110271169A (en) * 2018-03-13 2019-09-24 东和株式会社 The manufacturing method of resin molding apparatus and resin forming product

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DE3441906A1 (en) * 1984-11-16 1986-05-28 Erich 6520 Worms Beck Process for producing mouldings from thermoplastics-containing waste and from pure thermoplastics
EP0343245A1 (en) * 1987-12-04 1989-11-29 Meiwa Industry Co. Ltd. Method of manufacturing decorative sheet-carrying laminated molding
EP0551526A1 (en) * 1991-07-31 1993-07-21 Sumitomo Chemical Company Limited Method of molding multilayer molded article
DE4313043A1 (en) * 1992-04-23 1993-10-28 Ktx Co Ltd Polymer moulding prodn. having with vacuum-formed patterned skin - by thermo-forming e.g. PVC and polypropylene@ foam skin, holding it in position on its porous tool and applying e.g. extruded polypropylene@ behind
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FR2075220A5 (en) * 1970-01-07 1971-10-08 Gen Tire & Rubber Co
US4075266A (en) * 1976-11-01 1978-02-21 Friedrich Theysohn Method for coating foil material
DE3441906A1 (en) * 1984-11-16 1986-05-28 Erich 6520 Worms Beck Process for producing mouldings from thermoplastics-containing waste and from pure thermoplastics
EP0343245A1 (en) * 1987-12-04 1989-11-29 Meiwa Industry Co. Ltd. Method of manufacturing decorative sheet-carrying laminated molding
EP0551526A1 (en) * 1991-07-31 1993-07-21 Sumitomo Chemical Company Limited Method of molding multilayer molded article
DE4313043A1 (en) * 1992-04-23 1993-10-28 Ktx Co Ltd Polymer moulding prodn. having with vacuum-formed patterned skin - by thermo-forming e.g. PVC and polypropylene@ foam skin, holding it in position on its porous tool and applying e.g. extruded polypropylene@ behind
JPH06114877A (en) * 1992-09-30 1994-04-26 Sekisui Chem Co Ltd Manufacture of molded form

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1226914A1 (en) * 2001-01-30 2002-07-31 An der Heiden, Dominik Method for producing plastic parts
EP1233135A1 (en) * 2001-01-30 2002-08-21 An der Heiden, Dominik Method for producing a plastic part with a frame
US9309031B2 (en) 2009-09-07 2016-04-12 The Procter & Gamble Company Bottle cap made from a material comprising polypropylene, particulate calcium carbonate and additives
ITMO20100034A1 (en) * 2010-02-18 2011-08-19 Carlo Zacche PROCEDURE FOR MOLDING RUBBER DECORATIONS ON LEATHER ARTICLES AND OBTAINED LEATHER MANUFACTURED.
CN104647770A (en) * 2015-02-10 2015-05-27 华南理工大学 Method and device for manufacturing optical thin film having concave structures on surface
CN105058656A (en) * 2015-09-09 2015-11-18 李峰 Glass covering film manufacturing method
CN110271169A (en) * 2018-03-13 2019-09-24 东和株式会社 The manufacturing method of resin molding apparatus and resin forming product

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