WO1994004335A1 - Method of vibration-moulding and an apparatus for carrying out the moulding - Google Patents

Method of vibration-moulding and an apparatus for carrying out the moulding Download PDF

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Publication number
WO1994004335A1
WO1994004335A1 PCT/GB1993/001684 GB9301684W WO9404335A1 WO 1994004335 A1 WO1994004335 A1 WO 1994004335A1 GB 9301684 W GB9301684 W GB 9301684W WO 9404335 A1 WO9404335 A1 WO 9404335A1
Authority
WO
WIPO (PCT)
Prior art keywords
moulding
vibrating
vibration
distal
cavity
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/GB1993/001684
Other languages
French (fr)
Inventor
Meirion Gribble
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 GB929216968A external-priority patent/GB9216968D0/en
Application filed by Individual filed Critical Individual
Priority to JP6505991A priority Critical patent/JPH07509672A/en
Priority to AU47235/93A priority patent/AU4723593A/en
Priority to EP94908059A priority patent/EP0655967A1/en
Priority to SK169-95A priority patent/SK16995A3/en
Publication of WO1994004335A1 publication Critical patent/WO1994004335A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/022—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space whereby the material is subjected to vibrations
    • 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
    • B29C43/56—Compression moulding under special conditions, e.g. vacuum
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/008—Using vibrations during moulding

Definitions

  • the present invention is concerned with moulding, and in particular a moulding technique which assists filling of a mould cavity with a mould material.
  • a method of compression moulding which comprises:
  • moulding apparatus comprising at least first and second moulding surfaces defining a moulding cavity, at least one surface being movable such that said surfaces are arrangeable at relatively distal and proximal positions with respect to each other;
  • vibration of the moulding surface or surfaces substantially as hereinbefore described is advantageous for reducing the force required to close the cavity.
  • the moulding cavity is defined by opposed first and second surfaces, and the surfaces may be respectively vibrated in opposed directions.
  • the vibration is preferably such as to effect substantially complete filling of the cavity with the mould material.
  • the vibration may involve transverse vibration of at least one moulding surface, so as to urge the thermosetting material to substantially fill the moulding cavity.
  • the vibration may further comprise vibration of the opposed moulding surfaces between relatively proximal and distal arrangements, so as to assist compacting of the material between the surfaces.
  • the transverse vibration of a moulding surface may involve transverse motion in more than one direction.
  • the transverse vibration may involve substantially orthogonal vibratory motion of at least one surface.
  • the material to be moulded comprises a thermosetting resin or plastics material.
  • the resin or plastics material may be optionally mixed with fillers and fibre reinforcement.
  • the thermosetting resin or plastics material may preferably be mixed with an initiator or catalyst for enhancing curing of the material.
  • thermosetting material comprises a polyester resin mixed with slate dust and glass fibre reinforcement, together with a curing initiator.
  • the material may further include additional ingredients such as crushed limestone and a lubricant such as stearate.
  • the method may typically comprise a premixing stage, wherein the thermosetting resin or plastics material is admixed with the above preferred ingredients, prior to arrangement within the moulding cavity.
  • the moulding process may be part of a substantially continuous compression moulding system, wherein a plurality of such processes are operated on a production line type method.
  • moulding apparatus providing one or more cavities suitable for carrying out a process according to the present invention are arranged on a conveyor belt or the like, so that a plurality of moulding processes can be simultaneously operated.
  • apparatus suitable for carrying out a moulding process substantially as hereinbefore described, which apparatus comprises:
  • the apparatus comprises a plurality of moulding cavities, such that the apparatus is suitable to be employed in a substantially continuous compression moulding system as hereinbefore described.
  • the moulding cavities are arranged on a conveyor belt or similar transfer surface as hereinbefore described.
  • the vibrating means are advantageously capable of vibrating the moulding surface in a substantially controlled fashion as described above.
  • the moulded article comprises a roofing tile.
  • the thermosetting material comprises a slate filler
  • the moulded article may preferably comprise a roofing tile having the appearance of natural slate, particularly when the moulding surface has a surface relief corresponding to that of natural slate.
  • At least one moulding surface of the moulding apparatus hereinbefore described bears a complementary impression of natural slate.
  • the present invention will now be further illustrated, by way of example only by reference to the accompanying drawing, which does not limit the scope of the invention in any way.
  • the drawing is a schematic representation of apparatus according to the present invention suitable for use in compression moulding, and illustrates different stages during the moulding process.
  • mould 1 comprising mould halves 2,3.
  • the arrangement of mould 1 at progressive stages A,B,C of a compression moulding method is illustrated.
  • a thermosetting material 4 is located in a mould cavity 5 between facing surfaces 2a, 3a of halves 2,3. Mould surfaces 2a, 3a are maintained at about 120°C, for effecting curing of material 4.
  • Material 4 has been subjected to a pre-mixing stage, and weighed out as a batch of pre-determined weight prior to arrangement in cavity 5 as shown in stage A.
  • stage A mould halves 2,3 are disposed in a distal arrangement for ease of insertion of material 4 into cavity 5.
  • Surfaces 2a, 3a respectively comprise complementarily profiled raised and recessed formations.
  • Side walls 3b are provided with a resilient surfacing 3c, such that on coupling of the mould surfaces damage to mould half 3 is reduced.
  • mould half 2 is advanced towards mould half 3 so as to compress material 4 between surfaces 2a, 3a.
  • the latter is vibrated in a substantially horizontal direction as shown by arrow D. This vibration urges filling of cavity 5 with material 4.
  • Resilient surfacing 3c is also advantageous in absorbing the above described vibration of mould half 2.
  • mould half 2 is also vibrated in a vertical direction as shown by arrow E, so as to aid compacting of material 4 between surfaces 2a, 3a.
  • Mould 1 is clamped shut and surfaces 2a,3a heated until curing of thermosetting material 4 is complete and the moulded article is sufficiently rigid for removal from cavity 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A method of compression moulding which comprises providing moulding apparatus including first and second moulding surfaces defining a moulding cavity. At least one moulding surface is movable such that the surfaces are arrangeable at relatively distal and proximal positions with respect to each other. A curable material to be moulded is arranged in the moulding cavity and at least one surface is advanced from the distal to the proximal position. One or more moulding surface is vibrated during closure of the moulding cavity, so as to urge non-cured material into contact with substantially the entire of the moulding surfaces.

Description

METHOD OF VIBRATION-MOULDING AND AN APPARATUS FOR CARRYING OUT THE MOULDING
The present invention is concerned with moulding, and in particular a moulding technique which assists filling of a mould cavity with a mould material.
It is desirable during moulding processes to urge a mould material into the extremities of a mould cavity, so as to produce a moulded article replicating the contours and detail of the cavity. It is however often difficult to achieve the above, particularly so when a viscous thermosetting material commences curing during introduction into the cavity.
We have now developed a moulding process and apparatus which help to alleviate the above problem.
According to the present invention there is provided a method of compression moulding which comprises:
(a) providing moulding apparatus comprising at least first and second moulding surfaces defining a moulding cavity, at least one surface being movable such that said surfaces are arrangeable at relatively distal and proximal positions with respect to each other;
(b) arranging a curable material to be moulded in said cavity; and
(c) advancing said at least one movable surface from said distal to said proximal position, and concurrently vibrating one or more of said moulding surfaces so as to urge non-cured material into contact with substantially the entire of said moulding surfaces.
In addition to promoting filling of the moulding cavity with the thermosetting material, vibration of the moulding surface or surfaces substantially as hereinbefore described is advantageous for reducing the force required to close the cavity.
It is preferred that the moulding cavity is defined by opposed first and second surfaces, and the surfaces may be respectively vibrated in opposed directions. The vibration is preferably such as to effect substantially complete filling of the cavity with the mould material. The vibration may involve transverse vibration of at least one moulding surface, so as to urge the thermosetting material to substantially fill the moulding cavity. The vibration may further comprise vibration of the opposed moulding surfaces between relatively proximal and distal arrangements, so as to assist compacting of the material between the surfaces.
The transverse vibration of a moulding surface may involve transverse motion in more than one direction. Typically the transverse vibration may involve substantially orthogonal vibratory motion of at least one surface.
It is preferred that the material to be moulded comprises a thermosetting resin or plastics material.
The resin or plastics material may be optionally mixed with fillers and fibre reinforcement. The thermosetting resin or plastics material may preferably be mixed with an initiator or catalyst for enhancing curing of the material.
A preferred thermosetting material comprises a polyester resin mixed with slate dust and glass fibre reinforcement, together with a curing initiator. The material may further include additional ingredients such as crushed limestone and a lubricant such as stearate.
The method may typically comprise a premixing stage, wherein the thermosetting resin or plastics material is admixed with the above preferred ingredients, prior to arrangement within the moulding cavity.
The moulding process may be part of a substantially continuous compression moulding system, wherein a plurality of such processes are operated on a production line type method. In a preferred embodiment, moulding apparatus providing one or more cavities suitable for carrying out a process according to the present invention are arranged on a conveyor belt or the like, so that a plurality of moulding processes can be simultaneously operated.
There is still further provided by the present invention apparatus suitable for carrying out a moulding process substantially as hereinbefore described, which apparatus comprises:
(a) one or more moulding cavities each defined by at least first and second moulding surfaces; (b) means for moving at least one moulding surface, such that said surfaces are arrangeable at relatively distal and proximal positions with respect to each other; and
(c) means for vibrating one or more of said surfaces during advancement of said at least one movable surface from said distal position to said proximal position, whereby a curable material to be moulded present in said cavity is urged into contact with substantially the entire of said moulding surfaces before said material is fully cured.
In a preferred embodiment, the apparatus comprises a plurality of moulding cavities, such that the apparatus is suitable to be employed in a substantially continuous compression moulding system as hereinbefore described. Typically, the moulding cavities are arranged on a conveyor belt or similar transfer surface as hereinbefore described.
The vibrating means are advantageously capable of vibrating the moulding surface in a substantially controlled fashion as described above.
There is further provided by the present invention a moulded article obtained by a moulding process substantially as hereinbefore described.
In a particularly preferred embodiment of the present invention, the moulded article comprises a roofing tile. In the case where the thermosetting material comprises a slate filler, the moulded article may preferably comprise a roofing tile having the appearance of natural slate, particularly when the moulding surface has a surface relief corresponding to that of natural slate.
According to this preferred embodiment of the present invention, at least one moulding surface of the moulding apparatus hereinbefore described bears a complementary impression of natural slate.
The present invention will now be further illustrated, by way of example only by reference to the accompanying drawing, which does not limit the scope of the invention in any way. The drawing is a schematic representation of apparatus according to the present invention suitable for use in compression moulding, and illustrates different stages during the moulding process.
There is shown a mould generally designated 1 comprising mould halves 2,3. The arrangement of mould 1 at progressive stages A,B,C of a compression moulding method is illustrated. A thermosetting material 4 is located in a mould cavity 5 between facing surfaces 2a, 3a of halves 2,3. Mould surfaces 2a, 3a are maintained at about 120°C, for effecting curing of material 4.
Material 4 has been subjected to a pre-mixing stage, and weighed out as a batch of pre-determined weight prior to arrangement in cavity 5 as shown in stage A. In stage A, mould halves 2,3 are disposed in a distal arrangement for ease of insertion of material 4 into cavity 5.
Surfaces 2a, 3a respectively comprise complementarily profiled raised and recessed formations. Side walls 3b are provided with a resilient surfacing 3c, such that on coupling of the mould surfaces damage to mould half 3 is reduced.
As shown in stage B, mould half 2 is advanced towards mould half 3 so as to compress material 4 between surfaces 2a, 3a. During advance of mould half 2, the latter is vibrated in a substantially horizontal direction as shown by arrow D. This vibration urges filling of cavity 5 with material 4. Resilient surfacing 3c is also advantageous in absorbing the above described vibration of mould half 2.
During the latter stages of closure of mould 1, as shown in stage C, mould half 2 is also vibrated in a vertical direction as shown by arrow E, so as to aid compacting of material 4 between surfaces 2a, 3a.
Mould 1 is clamped shut and surfaces 2a,3a heated until curing of thermosetting material 4 is complete and the moulded article is sufficiently rigid for removal from cavity 5.

Claims

Claims:
1. A method of compression moulding which comprises:
(a) providing moulding apparatus comprising at least first and second moulding surfaces defining a moulding cavity, at least one surface being movable such that said surfaces are arrangeable at relatively distal and proximal positions with respect to each other;
(b) arranging a curable material to be moulded in said cavity; and
(c) advancing said at least one movable surface from said distal to said proximal position, and concurrently vibrating one or more of said moulding surfaces so as to urge non-cured material into contact with substantially the entire of said moulding surfaces.
2. A method according to claim 1, wherein said surfaces are respectively vibrated in opposed directions.
3. A method according to claim 1 or 2, wherein said vibration involves transverse vibration of at least one moulding surface.
4. A method according to claim 3, wherein said transverse vibration of said at least one moulding surface involves transverse motion in more than one direction.
5. A method according to claim 4, wherein said transverse vibration involves substantially orthogonal vibratory motion of at least one surface.
6. A method according to any of claims 1 to 5, wherein said vibration further comprises vibration of the opposed moulding surfaces between relatively proximal and distal arrangements, so as to assist compacting of the material between the surfaces.
7. A method according to any of claims 1 to 6, wherein the curable material comprises a thermosetting resin or plastics material.
8. A method according to claim 7, wherein the resin or plastics material includes fillers and fibre reinforcement.
9. A method according to claim 7 or 8, wherein the thermosetting resin or plastics material includes a curing initiator or catalyst.
10. Apparatus for carrying out a compression moulding process, which apparatus comprises:
(a) one or more moulding cavities each defined by at least first and second moulding surfaces;
(b) means for moving at least one moulding surface, such that said surfaces are arrangeable at relatively distal and proximal positions with respect to each other; and
(c) means for vibrating one or more of said surfaces during advancement of said at least one movable surface from said distal position whereby a curable material to be moulded present in said cavity is urged into contact with substantially the entire of said moulding surfaces before said material is fully cured.
11. Apparatus according to claim 10, which comprises a plurality of said moulding cavities.
12. Apparatus according to claim 10 or 11, wherein said vibrating means are capable of respectively vibrating said moulding surfaces in opposed directions.
13. Apparatus according to any of claims 10 to 12, wherein said vibrating means are capable of transversely vibrating at least one moulding surface.
14. Apparatus according to claim 13, wherein said transverse vibration of said at least one moulding surface involves transverse motion in more than one direction.
15. Apparatus according to claim 14, wherein the transverse vibration involves substantially orthogonal vibratory motion of at least one surface.
16. Apparatus according to any of claims 10 to 15, wherein said vibrating means are capable of vibrating opposed moulding surfaces between relatively distal and proximal arrangements, so as to assist compacting of the material between the surfaces.
17. Apparatus according to any of claims 10 to 16, wherein at least one moulding surface bears a complementary impression of natural slate.
PCT/GB1993/001684 1992-08-11 1993-08-09 Method of vibration-moulding and an apparatus for carrying out the moulding Ceased WO1994004335A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6505991A JPH07509672A (en) 1992-08-11 1993-08-09 Vibration molding method and device for performing vibration molding
AU47235/93A AU4723593A (en) 1992-08-11 1993-08-09 Method of vibration-moulding and an apparatus for carrying out the moulding
EP94908059A EP0655967A1 (en) 1992-08-11 1993-08-09 Method of vibration-moulding and an apparatus for carrying out the moulding
SK169-95A SK16995A3 (en) 1992-08-11 1993-08-09 Method of vibration-pressing and apparatus for realization of this method

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB929216968A GB9216968D0 (en) 1992-08-11 1992-08-11 Method of and apparatus for moulding
GB9216968.9 1992-08-11
GB9306324A GB2272856A (en) 1992-08-11 1993-03-26 Vibrating mould surface while charging mouldable material to mould
GB9306324.6 1993-03-26

Publications (1)

Publication Number Publication Date
WO1994004335A1 true WO1994004335A1 (en) 1994-03-03

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ID=26301411

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/001684 Ceased WO1994004335A1 (en) 1992-08-11 1993-08-09 Method of vibration-moulding and an apparatus for carrying out the moulding

Country Status (9)

Country Link
EP (1) EP0655967A1 (en)
JP (1) JPH07509672A (en)
AU (1) AU4723593A (en)
CA (1) CA2142108A1 (en)
CZ (1) CZ33695A3 (en)
GB (1) GB2272856A (en)
RU (1) RU95101847A (en)
SK (1) SK16995A3 (en)
WO (1) WO1994004335A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5476617A (en) * 1993-02-19 1995-12-19 The Board Of Regents Of The University Of Wisconsin Rotational and vibrational process for molding cellulosic fibers
WO1998017457A1 (en) * 1996-10-21 1998-04-30 Erwin Ronald D Molded lumber substitute and manufacturing method therefor
US6149844A (en) * 1994-09-09 2000-11-21 Decta Holdings Pty Ltd. Method of manufacturing composites
DE102023115817A1 (en) * 2023-06-16 2024-12-19 Kiefel Gmbh Process for producing three-dimensional products from a fibrous material using at least one molding tool and molding tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9821274D0 (en) * 1998-10-01 1998-11-25 Gribole Meirion A plastics moulding press
DE10214626B4 (en) * 2002-04-02 2004-06-03 Buchwald, Schneider & Matten Gmbh Press tool for the production of molded parts with resin mat or the like

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123857A (en) * 1964-03-10 Plastic molding apparatus and method
US3994660A (en) * 1974-03-08 1976-11-30 Fives-Cail Babcock Molding machine
GB2224283A (en) * 1988-10-28 1990-05-02 Valle Roberto Dalla Process for obtaining artificial stone for flooring and stone facing
US5182061A (en) * 1990-07-20 1993-01-26 Nisshinbo Industries, Inc. Method of vibration-molding friction member

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB627406A (en) * 1946-10-02 1949-08-09 Sidney Arthur Leader Improvements in or relating to the manufacture of artificial teeth
CH477966A (en) * 1967-07-14 1969-09-15 Kabel Metallwerke Ghh Process for producing molded articles from polyamides
DE2558827A1 (en) * 1975-12-27 1977-07-14 Demag Kunststofftech METHOD OF INJECTION MOLDING OF MOLDED PARTS FROM CERAMIC COMPOSITION AND INJECTION MOLDING MACHINE THEREFORE
GB2008023A (en) * 1977-08-24 1979-05-31 Daniels Stroud Ltd Vibrating moulding material during injection or extrusion
GB2222547A (en) * 1988-09-07 1990-03-14 Distraker Limited Apparatus and method for moulding articles from concrete or similar settable material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123857A (en) * 1964-03-10 Plastic molding apparatus and method
US3994660A (en) * 1974-03-08 1976-11-30 Fives-Cail Babcock Molding machine
GB2224283A (en) * 1988-10-28 1990-05-02 Valle Roberto Dalla Process for obtaining artificial stone for flooring and stone facing
US5182061A (en) * 1990-07-20 1993-01-26 Nisshinbo Industries, Inc. Method of vibration-molding friction member

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Derwent's abstract, No 85-266 385/43, week 8543, ABSTRACT OF JP 60 178 003, (TOTO KK), 1985-09-12 *
Derwent's abstract, No 88-60 334/09, week 8809, ABSTRACT OF JP 63 015 712, (INAX KK), 1988-01-22 *
Derwent's abstract, No 89-2 639/01, week 8901, ABSTRACT OF JP 63 278 810, (NIPPON STEEL CORP; NAKAJIMA ENG), 1988-11-16 *
Derwent's abstract, No 91-322 160/44, week 9144, ABSTRACT OF JP 3 216 298, (IDEMITSU KOSAN CO LTD; SEIDENSHA DENSHI KOGYO K), 1991-09-24 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5476617A (en) * 1993-02-19 1995-12-19 The Board Of Regents Of The University Of Wisconsin Rotational and vibrational process for molding cellulosic fibers
US6149844A (en) * 1994-09-09 2000-11-21 Decta Holdings Pty Ltd. Method of manufacturing composites
WO1998017457A1 (en) * 1996-10-21 1998-04-30 Erwin Ronald D Molded lumber substitute and manufacturing method therefor
DE102023115817A1 (en) * 2023-06-16 2024-12-19 Kiefel Gmbh Process for producing three-dimensional products from a fibrous material using at least one molding tool and molding tool
US12617173B2 (en) 2023-06-16 2026-05-05 Kiefel Gmbh Method for manufacturing three-dimensional products from a fiber-containing material using at least one forming tool and forming tool

Also Published As

Publication number Publication date
GB9306324D0 (en) 1993-05-19
GB2272856A (en) 1994-06-01
JPH07509672A (en) 1995-10-26
CZ33695A3 (en) 1995-09-13
RU95101847A (en) 1997-01-27
SK16995A3 (en) 1995-07-11
AU4723593A (en) 1994-03-15
CA2142108A1 (en) 1994-03-03
EP0655967A1 (en) 1995-06-07

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