WO2002026456A2 - Method of handling synthetic wood mouldings and article - Google Patents

Method of handling synthetic wood mouldings and article Download PDF

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Publication number
WO2002026456A2
WO2002026456A2 PCT/ZA2001/000126 ZA0100126W WO0226456A2 WO 2002026456 A2 WO2002026456 A2 WO 2002026456A2 ZA 0100126 W ZA0100126 W ZA 0100126W WO 0226456 A2 WO0226456 A2 WO 0226456A2
Authority
WO
WIPO (PCT)
Prior art keywords
mouldings
moulding
wood
flexible
solvent
Prior art date
Application number
PCT/ZA2001/000126
Other languages
French (fr)
Other versions
WO2002026456A8 (en
WO2002026456A3 (en
Inventor
Barry Lipman
Original Assignee
Steinhoff Manufacturing (Pty) Ltd.
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 Steinhoff Manufacturing (Pty) Ltd. filed Critical Steinhoff Manufacturing (Pty) Ltd.
Priority to AU2001293317A priority Critical patent/AU2001293317A1/en
Publication of WO2002026456A2 publication Critical patent/WO2002026456A2/en
Publication of WO2002026456A3 publication Critical patent/WO2002026456A3/en
Publication of WO2002026456A8 publication Critical patent/WO2002026456A8/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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/3697—Moulds for making articles of definite length, i.e. discrete articles comprising rollers or belts cooperating with non-rotating mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/28—Moulding or pressing characterised by using extrusion presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N5/00—Manufacture of non-flat articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B3/00—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs
    • B30B3/04—Presses characterised by the use of rotary pressing members, e.g. rollers, rings, discs co-operating with one another, e.g. with co-operating cones
    • 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
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
    • B29C2043/3657—Bags, bleeder sheets or cauls for isostatic pressing additional materials, e.g. permeable bleeder or breather sheets, cloths, blankets
    • 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
    • B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
    • B29K2311/14—Wood, e.g. woodboard or fibreboard

Definitions

  • This invention relates to synthetic wood mouldings of the type used to embellish furniture, doors, panels, picture frames and the like and is concerned with a method of handling elongate mouldings and a product used therein.
  • Synthetic wood mouldings are made by moulding a paste comprising a mixture of wood flour, a binder and a solvent.
  • the wood paste sets after time and can be stained, painted, sanded, polished, etc. to have the appearance of natural wood.
  • the moulding process may use a die having cavities that are filled, the die then being pressed against a backing board provided with a release coating or against a wooden panel provided with a bonding agent.
  • Elongate mouldings may be made the same way, though the present inventor has proposed a more efficient process involving pressing a paste sausage using a circular, rotatable die.
  • the mouldings are allowed to set and are then stored for an extended period to permit all of the solvent to evaporate or react with the binder, because the solvent may be and usually is incompatible with or antagonistic to the finishing lacquers used on wooden items.
  • the mouldings are warmed, so that they soften and can then be applied to and made to conform to the shapes of basic wooden articles, such as furniture legs, edges and the like.
  • This invention seeks to provide a method for handling, including storing, transporting and warming, elongate mouldings in an economical and convenient manner.
  • One aspect of the invention provides a method of handling elongate synthetic wood mouldings, the mouldings being formed of a settable wood paste comprising wood flour, a binder and a solvent that is flexible under certain conditions and stiff under other conditions, characterised by including the steps of:
  • the method is further preferably characterised by storing and transporting the mouldings while they are in a coiled state.
  • Another aspect of the invention provides an elongate synthetic wood moulding, the moulding being formed of a settable wood paste comprising wood flour, a binder and a solvent that is flexible under certain conditions and stiff under other conditions, characterised in that the moulding is in the form of a coil and the moulding is heat softener so that it can be uncoiled for use.
  • Elongate mouldings in coil form can be stacked compactly and be manipulated or handled easily with little possibility of them breaking accidentally compared to uncoiled elongate mouldings.
  • Such coils can be conveniently packed for retail display and sale and, for use, warmed with little difficulty using small containers, such as in a pot on a stove or in a hand basin of hot water.
  • Figure 1 shows a side view of a moulding machine setup for moulding elongate synthetic wood mouldings
  • Figure 2 shows an end view of the machine of Figure 1
  • Figure 3 shows a plan view of an elongate synthetic wood moulding
  • Figure 4 shows plan view of the elongate synthetic wood moulding of
  • Figure 3 rolled into a coil
  • Figure 5 shows a plurality of coils of the type shown in Figure 4 stacked for curing and storage
  • Figure 6 shows a water bath for heating coiled elongate synthetic wood mouldings to soften them
  • Figure 7 shows a coil that has been softened and unravelled.
  • Figures 1 and 2 show a machine 10 for making elongate synthetic wood mouldings, the machine comprising a dispenser 12 to extrude a wood paste sausage 22, a board 24 to support the sausage on a roller conveyor 26 comprising idler rollers 28, and a rotatable wheel mould 30 for pressing the sausage against the board to form an elongate moulding 32.
  • the dispenser comprises a hopper 14 for pre-mixed wood paste, an extruder 16 having a screw 18 and a dispensing nozzle 20.
  • the wheel mould is driven by an electric motor 34 through a reduction gearbox 36 that drives an axle 38 on which the wheel is mounted.
  • the wheel is formed with a reversed or negative image 40 of the profile to be formed on the moulding 32.
  • Figure 3 shows the moulding 32 on the board 24, which has been previously coated with a release agent, one end of the moulding being shown turned over to start coiling the moulding while the paste is still flexible.
  • Figure 4 shows the moulding 32 completely rolled into a coil 42.
  • Figure 5 shows a storage rack 44 with a plurality of coils 42 stacked thereon so that they can cure and thereafter be stored.
  • a cured coil 42 is placed in a bath 46 containing water 48 that is heated to a preset temperature, normally between 40 and 60°C, by a heating element 50. When the coil has been heated sufficiently, normally this takes 2 to 5 minutes depending on the temperature of the water in the bath, it is removed and unravelled as shown in Figure 7.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Elongate synthetic wood mouldings formed of a settable wood paste comprising wood flour, a binder and a solvent that is flexible under certain conditions and stiff under other conditions are cured, stored, transported and displayed in a coiled form. For use each is warmed in a heated liquid bath, so that it becomes flexible whereafter it is uncoiled and applied to a required surface.

Description

METHOD OF HANDLING SYNTHETIC WOOD MOULDINGS AND PRODUCT USED THEREIN
TECHNICAL FIELD:
This invention relates to synthetic wood mouldings of the type used to embellish furniture, doors, panels, picture frames and the like and is concerned with a method of handling elongate mouldings and a product used therein.
BACKGROUND ART: Synthetic wood mouldings are made by moulding a paste comprising a mixture of wood flour, a binder and a solvent. The wood paste sets after time and can be stained, painted, sanded, polished, etc. to have the appearance of natural wood. The moulding process may use a die having cavities that are filled, the die then being pressed against a backing board provided with a release coating or against a wooden panel provided with a bonding agent. Elongate mouldings may be made the same way, though the present inventor has proposed a more efficient process involving pressing a paste sausage using a circular, rotatable die. In practice, the mouldings are allowed to set and are then stored for an extended period to permit all of the solvent to evaporate or react with the binder, because the solvent may be and usually is incompatible with or antagonistic to the finishing lacquers used on wooden items. When required for use the mouldings are warmed, so that they soften and can then be applied to and made to conform to the shapes of basic wooden articles, such as furniture legs, edges and the like.
Problems thus arises in that space has to be provided for storing, care has to be taken in handling, and facilities have to be provided for warming such mouldings when required.
This invention seeks to provide a method for handling, including storing, transporting and warming, elongate mouldings in an economical and convenient manner. DISCLOSURE OF THE INVENTION:
One aspect of the invention provides a method of handling elongate synthetic wood mouldings, the mouldings being formed of a settable wood paste comprising wood flour, a binder and a solvent that is flexible under certain conditions and stiff under other conditions, characterised by including the steps of:
~ after moulding and while the mouldings are flexible, rolling each moulding into a coil; -- storing the coiled mouldings to permit each to set and the solvent to dissipate by evaporation or reaction; and
- when required, placing a selected number of the coiled mouldings in a receptacle of liquid warmed to a predetermined temperature appropriate to the composition of the mouldings to cause the mouldings to become flexible and then uncoiling the mouldings (32) so that they can be applied to a required surface.
The method is further preferably characterised by storing and transporting the mouldings while they are in a coiled state.
Another aspect of the invention provides an elongate synthetic wood moulding, the moulding being formed of a settable wood paste comprising wood flour, a binder and a solvent that is flexible under certain conditions and stiff under other conditions, characterised in that the moulding is in the form of a coil and the moulding is heat softener so that it can be uncoiled for use.
Elongate mouldings in coil form can be stacked compactly and be manipulated or handled easily with little possibility of them breaking accidentally compared to uncoiled elongate mouldings. Such coils can be conveniently packed for retail display and sale and, for use, warmed with little difficulty using small containers, such as in a pot on a stove or in a hand basin of hot water.
Further features, variants and/or advantages of the invention will emerge from the following non-limiting description of an example of the invention made with reference to the accompanying schematic drawings. BRIEF DESCRIPTION OF THE DRAWINGS:
Figure 1 shows a side view of a moulding machine setup for moulding elongate synthetic wood mouldings; Figure 2 shows an end view of the machine of Figure 1 ; Figure 3 shows a plan view of an elongate synthetic wood moulding; Figure 4 shows plan view of the elongate synthetic wood moulding of
Figure 3 rolled into a coil; Figure 5 shows a plurality of coils of the type shown in Figure 4 stacked for curing and storage; Figure 6 shows a water bath for heating coiled elongate synthetic wood mouldings to soften them; and Figure 7 shows a coil that has been softened and unravelled.
DESCRIPTION OF PREFERRED EMBODIMENTS: In the drawings the same or similar parts have the same reference numbers.
Figures 1 and 2 show a machine 10 for making elongate synthetic wood mouldings, the machine comprising a dispenser 12 to extrude a wood paste sausage 22, a board 24 to support the sausage on a roller conveyor 26 comprising idler rollers 28, and a rotatable wheel mould 30 for pressing the sausage against the board to form an elongate moulding 32. The dispenser comprises a hopper 14 for pre-mixed wood paste, an extruder 16 having a screw 18 and a dispensing nozzle 20. The wheel mould is driven by an electric motor 34 through a reduction gearbox 36 that drives an axle 38 on which the wheel is mounted. The wheel is formed with a reversed or negative image 40 of the profile to be formed on the moulding 32.
Figure 3 shows the moulding 32 on the board 24, which has been previously coated with a release agent, one end of the moulding being shown turned over to start coiling the moulding while the paste is still flexible. Figure 4 shows the moulding 32 completely rolled into a coil 42. Figure 5 shows a storage rack 44 with a plurality of coils 42 stacked thereon so that they can cure and thereafter be stored.
In Figure 6 a cured coil 42 is placed in a bath 46 containing water 48 that is heated to a preset temperature, normally between 40 and 60°C, by a heating element 50. When the coil has been heated sufficiently, normally this takes 2 to 5 minutes depending on the temperature of the water in the bath, it is removed and unravelled as shown in Figure 7.
The invention is not limited to the precise details described above and shown in the drawings. Modifications may be made and other embodiments developed without departing from the scope of the invention as set out in the claims.

Claims

CLAIMS:
1. A method of handling elongate synthetic wood mouldings, the mouldings being formed of a settable wood paste comprising wood flour, a binder and a solvent that is flexible under certain conditions and stiff under other conditions, characterised by including the steps of:
- after moulding and while the mouldings are flexible, rolling each moulding into a coil (42);
~ storing the coiled mouldings to permit each to set and the solvent to dissipate by evaporation or reaction; and
- when required, placing a selected number of the coiled mouldings in a receptacle of liquid (46, 48) warmed to a predetermined temperature appropriate to the composition of the mouldings to cause the mouldings to become flexible and then uncoiling the mouldings (32) so that they can be applied to a required surface.
2. The method of claim 1 , characterised by storing and transporting the mouldings while they are in a coiled state.
3. An elongate synthetic wood moulding, the moulding being formed of a settable wood paste comprising wood flour, a binder and a solvent that is flexible under certain conditions and stiff under other conditions, characterised in that the moulding is in the form of a coil (42) and the moulding is heat softener so that it can be uncoiled for use.
PCT/ZA2001/000126 2000-09-29 2001-08-29 Method of handling synthetic wood mouldings and article WO2002026456A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001293317A AU2001293317A1 (en) 2000-09-29 2001-08-29 Method of handling synthetic wood mouldings and article

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2000/5260 2000-09-29
ZA200005259 2000-09-29

Publications (3)

Publication Number Publication Date
WO2002026456A2 true WO2002026456A2 (en) 2002-04-04
WO2002026456A3 WO2002026456A3 (en) 2002-05-16
WO2002026456A8 WO2002026456A8 (en) 2002-11-07

Family

ID=25588924

Family Applications (2)

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PCT/ZA2001/000126 WO2002026456A2 (en) 2000-09-29 2001-08-29 Method of handling synthetic wood mouldings and article
PCT/ZA2001/000127 WO2002026455A2 (en) 2000-09-29 2001-08-29 Method and apparatus for moulding synthetic wood and product used therein

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/ZA2001/000127 WO2002026455A2 (en) 2000-09-29 2001-08-29 Method and apparatus for moulding synthetic wood and product used therein

Country Status (2)

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AU (2) AU2001293317A1 (en)
WO (2) WO2002026456A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012064111A2 (en) * 2010-11-10 2012-05-18 Lg Hausys, Ltd. Apparatus for manufacturing synthetic wood having stripes and the method thereof and the synthetic wood of the same
US8361590B2 (en) 2005-02-02 2013-01-29 Defence Research & Development Organization Lightweight structural composite for load bearing applications
CN103921332A (en) * 2014-04-23 2014-07-16 张家港市盛港绿色防火建材有限公司 Edge-scraping-free and carving-free door core plate production device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005956A1 (en) * 1986-03-27 1987-10-08 Hammarberg, Lars Method and apparatus for shaping, preferably bending, hardened wood fibre boards
EP0862990A1 (en) * 1997-02-28 1998-09-09 Impero Valenti Apparatus for the continuous production of wood-based laminates

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FR2061807A5 (en) * 1969-04-08 1971-06-25 Travaini Ets Fabrication of shoes and morocco leather articles
US4461738A (en) * 1979-09-07 1984-07-24 Dennison Manufacturing Company Method of continuous extrusion molding
JPS6349398A (en) * 1986-08-18 1988-03-02 Ishikawajima Harima Heavy Ind Co Ltd Method and device for continuous type hot press
GB9026933D0 (en) * 1990-12-12 1991-01-30 Knackstedt Jack S A process for manufacturing an article,an apparatus for carrying out the process and an article made thereby
DE69225733T2 (en) * 1991-03-12 1998-10-01 Takeda Chemical Industries Ltd Molding process and device
JPH05169465A (en) * 1991-12-25 1993-07-09 Dainippon Printing Co Ltd Reaction cast molding method
JP3138842B2 (en) * 1992-08-18 2001-02-26 株式会社ジェルテック Manufacturing method of silicone gel parts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005956A1 (en) * 1986-03-27 1987-10-08 Hammarberg, Lars Method and apparatus for shaping, preferably bending, hardened wood fibre boards
EP0862990A1 (en) * 1997-02-28 1998-09-09 Impero Valenti Apparatus for the continuous production of wood-based laminates

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8361590B2 (en) 2005-02-02 2013-01-29 Defence Research & Development Organization Lightweight structural composite for load bearing applications
WO2012064111A2 (en) * 2010-11-10 2012-05-18 Lg Hausys, Ltd. Apparatus for manufacturing synthetic wood having stripes and the method thereof and the synthetic wood of the same
WO2012064111A3 (en) * 2010-11-10 2012-07-19 Lg Hausys, Ltd. Apparatus for manufacturing synthetic wood having stripes and the method thereof and the synthetic wood of the same
CN103921332A (en) * 2014-04-23 2014-07-16 张家港市盛港绿色防火建材有限公司 Edge-scraping-free and carving-free door core plate production device

Also Published As

Publication number Publication date
WO2002026455A2 (en) 2002-04-04
WO2002026455A8 (en) 2002-11-07
WO2002026456A8 (en) 2002-11-07
AU2001293317A1 (en) 2002-04-08
WO2002026455A3 (en) 2003-01-09
WO2002026456A3 (en) 2002-05-16
AU2001295096A1 (en) 2002-04-08

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