WO1991010546A1 - A mould for moulding of a thermosetting substance - Google Patents

A mould for moulding of a thermosetting substance Download PDF

Info

Publication number
WO1991010546A1
WO1991010546A1 PCT/SE1990/000739 SE9000739W WO9110546A1 WO 1991010546 A1 WO1991010546 A1 WO 1991010546A1 SE 9000739 W SE9000739 W SE 9000739W WO 9110546 A1 WO9110546 A1 WO 9110546A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
moulds
substance
insert
moulding
Prior art date
Application number
PCT/SE1990/000739
Other languages
French (fr)
Inventor
Roger Johansson
Roger Norrman
Original Assignee
Swerad Heat Radiating Concrete Ab
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 Swerad Heat Radiating Concrete Ab filed Critical Swerad Heat Radiating Concrete Ab
Publication of WO1991010546A1 publication Critical patent/WO1991010546A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0011—Mould seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/346—Manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/68—Release sheets

Definitions

  • the present invention relates to a mould for casting a hardenable substance within a space between at least two separable mould halves.
  • Mass production of precision cast parts of a hardenable substance is traditionally made using metal moulds, e.g. moulds made from aluminum or steel.
  • moulds made from steel are usually used in these conditions.
  • a problem with this kind of mass production is that the concrete needs a relatively long time for hardening, in order to reach sufficient strength, so that the moulded part can be removed from the mould and then cure, e.g. under supply of heat.
  • the number of moulds usually has to correspond to the daily output. If a product comprises several different separately made moulded details, the number of moulds thus has to be multiplied with the number of details.
  • a steel mould is very expensive to manufacture. For this reason, the investments in moulds will be very high when a mass production of moulded concrete products is started.
  • One object of the present invention is therefore to provide a simple and cheap mould which does not present the above described disadvantages.
  • each mould acts as a support surface for an plastics insert which abuts said mould inside. Since the insert is a loose part, the separation of the mould halves from the moulded component is surprisingly facilitated.
  • the insert consists of a heat formed plastics sheet.
  • Such inserts can be mass produced at a very low cost.
  • the moulds are made from a hardenable substance, e.g. concrete. These moulds can be produced at a very low cost.
  • a reinforcing frame e.g. made from metal beams.
  • the moulds and the insertable inserts are provided with a profiled seal which forms a sealing in the joint between the moulds.
  • Fig. 1 is a perspective view showing the two mould halves separated from each other
  • Fig. 2 correspondingly shows a free insert
  • Fig. 3 is a section along the line the line III-III through the two separated mould halves.
  • mould halves 10 and 11 are shown, each comprising a steel frame 12 manufactured from welded L- beams and a mould bed 13 placed within said frame.
  • a number of bolts 14 are welded to one of the frames 12, said olts being arranged to be received in a corresponding numbe of sleeves 15 which are welded to the other frame 12. nen the two mould halves 10, 11 have been moved togetxer, nuts which are not shown in the drawing can be entered upon the bolt ends and tightened, so that the mould halves are held together with a certain pretension.
  • the mould beds 13 are manufactured from concrete which is cast between the beams of the steel frame and will be rigidly connected to the frame by adhesion.
  • the connection can be made completely secure by suitable design of the frame, e.g. with across beams.
  • the inside of the mould is cast in such a way that it will be adapted to the form of the object which will be moulded.
  • the insert 16 is manufactured from a thin sheet of plastics which preferable has been produced by heat forming, so that its inside exactly corresponds to the shape of the object which shall be cast in the mould.
  • the heat forming of the sheet of plastics which may have a thickness of 0,5 - 1 mm, is made in the conventional manner by heating the sheet of plastics to a suitable temperature and subsequently forming it by means of different air pressures on the two sides of the sheet, so that it is drawn towards a form face corresponding to the object to be moulded. Then when the sheet is cooled down to normal room temperature, it will maintain its given shape.
  • Fig. 3 shows how each of the two mould halves 10, 11 are provided with an insert 16 which has recesses and elevations 16a which are supported by corresponding recesses and elevations 13a in the mould beds 13.
  • the mould bed and the insert 16 in the mould halve 11 has been provided with a protruding V-shaped lip 17, while the other mould halve 10 has been provided with a correspondingly shaped slot 18.
  • these sealing means are broken by openings 19 enabling the supply of moulding mastic and evacuation of air.
  • the invention is not limited to the above described embodiment, but several modifications are possible within the scope of the accompanying claims.
  • the arrangement according to the invention can also be used for moulds where more than two mould halves are used.
  • the steel frame 12 is not necessary for the invention, but when a frame is used, it may naturally differ very much from the described embodiment.

Abstract

A mould for casting a hardenable substance within a space between at least two separable mould halves (10, 11). In order to facilitate separation of the moulds, the inside of each mould (10, 11) acts as a support surface for a plastics insert (16) which abuts said mould inside.

Description

Title:
A Mould for Moulding of a Thermosetting Substance.
Field of the invention:
The present invention relates to a mould for casting a hardenable substance within a space between at least two separable mould halves.
Technical background:
Mass production of precision cast parts of a hardenable substance, e.g. synthetic resin, is traditionally made using metal moulds, e.g. moulds made from aluminum or steel.
If the hardenable substance is concrete, corrosion problems may occur in the aluminum. Therefore, moulds made from steel are usually used in these conditions. A problem with this kind of mass production, is that the concrete needs a relatively long time for hardening, in order to reach sufficient strength, so that the moulded part can be removed from the mould and then cure, e.g. under supply of heat. On account of the long time for hardening, the number of moulds usually has to correspond to the daily output. If a product comprises several different separately made moulded details, the number of moulds thus has to be multiplied with the number of details. A steel mould is very expensive to manufacture. For this reason, the investments in moulds will be very high when a mass production of moulded concrete products is started.
Attempts have been made to produce moulds from a more inexpensive material, for mass production of concrete components. For example, it has been attempted to produce moulds from concrete with an inner surface of a plastics substance. However, those attempts have failed because the bond often is as good between the plastics substance and the moulded component, as between the plastics substance and the concrete mould. This results in problems when separating the two mould halves from the moulded component, because unforeseeable tensile stresses occur in the moulded component and in the concrete mould. Therefore, it is difficult to maintain a low rate of cassation and simultaneously maintain a high production rate.
The technical problem:
One object of the present invention is therefore to provide a simple and cheap mould which does not present the above described disadvantages.
The solution:
This object is achieved according to the invention, because the inside of each mould acts as a support surface for an plastics insert which abuts said mould inside. Since the insert is a loose part, the separation of the mould halves from the moulded component is surprisingly facilitated.
According to one preferable embodiment of the invention, the insert consists of a heat formed plastics sheet. Such inserts can be mass produced at a very low cost.
Preferably, the moulds are made from a hardenable substance, e.g. concrete. These moulds can be produced at a very low cost.
In order to facilitate the handling of the mould halves, they can be provided with a reinforcing frame, e.g. made from metal beams.
Preferably, the moulds and the insertable inserts are provided with a profiled seal which forms a sealing in the joint between the moulds. Briei description of the drawings:
One embodiment of the invention will now be described in more detail with reference to the accompanying drawing, in which Fig. 1 is a perspective view showing the two mould halves separated from each other, Fig. 2 correspondingly shows a free insert, and Fig. 3 is a section along the line the line III-III through the two separated mould halves.
Preferred embodiments of the invention:
In the drawing, two mould halves 10 and 11 are shown, each comprising a steel frame 12 manufactured from welded L- beams and a mould bed 13 placed within said frame.
A number of bolts 14 are welded to one of the frames 12, said olts being arranged to be received in a corresponding numbe of sleeves 15 which are welded to the other frame 12. nen the two mould halves 10, 11 have been moved togetxer, nuts which are not shown in the drawing can be entered upon the bolt ends and tightened, so that the mould halves are held together with a certain pretension.
Preferably, the mould beds 13 are manufactured from concrete which is cast between the beams of the steel frame and will be rigidly connected to the frame by adhesion. The connection can be made completely secure by suitable design of the frame, e.g. with across beams.
The inside of the mould is cast in such a way that it will be adapted to the form of the object which will be moulded. In this connection, consideration must be taken to an insert 16 (see Fig. 2) which shall be placed in each mould halve. The insert 16 is manufactured from a thin sheet of plastics which preferable has been produced by heat forming, so that its inside exactly corresponds to the shape of the object which shall be cast in the mould. The heat forming of the sheet of plastics, which may have a thickness of 0,5 - 1 mm, is made in the conventional manner by heating the sheet of plastics to a suitable temperature and subsequently forming it by means of different air pressures on the two sides of the sheet, so that it is drawn towards a form face corresponding to the object to be moulded. Then when the sheet is cooled down to normal room temperature, it will maintain its given shape.
Fig. 3 shows how each of the two mould halves 10, 11 are provided with an insert 16 which has recesses and elevations 16a which are supported by corresponding recesses and elevations 13a in the mould beds 13.
In order to prevent mastic from forcing its way out between the two mould halves 10, 11, the mould bed and the insert 16 in the mould halve 11 has been provided with a protruding V-shaped lip 17, while the other mould halve 10 has been provided with a correspondingly shaped slot 18. At suitable places, these sealing means are broken by openings 19 enabling the supply of moulding mastic and evacuation of air.
When the moulding mastic has hardened sufficiently for the separation of the two mould halves, it will be simple to separate the two mould halves since the plastic insert 16 has no tendency to adhere either to inside of the mould or to the moulded object.
It has been verified that cassation caused by problems during separation of the mould halves almost will be negligible by means of the above described arrangement. It is possible to use the inserts several times which can be desirable from the ecological viewpoint, but because the cost of each mould insert is very low, it is possible from the economical viewpoint to change inserts often or even for every new moulding.
The invention is not limited to the above described embodiment, but several modifications are possible within the scope of the accompanying claims. For example, the arrangement according to the invention can also be used for moulds where more than two mould halves are used. The steel frame 12 is not necessary for the invention, but when a frame is used, it may naturally differ very much from the described embodiment.

Claims

Claims:
1. A mould for casting a hardenable substance within a space between at least two separable mould halves (10, 11), c h a r a c t e r i z e d in that the inside of each mould (10, 11) acts as a support surface for an plastics insert (16) which abuts said mould inside.
2. A mould according to claim 1, c h a r a c t e r i z e d in that the insert (16) consists of a heat formed plastics sheet.
3. A mould according to claim 1 or 2, c h a r a c t e r i z e d in that the moulds (10, 11) are made from a hardenable substance, e.g. concrete.
4. A mould according to claim 3, c h a r a c t e r i z e d in that each of the moulds (10, 11) is provided with a reinforcing frame (12).
5. A mould according to claim 4, c h a r a c t e r i z e d in that the frame (12) is manufactured from metal beams.
6. A mould according to any of the preceding claims, c h a r a c t e r i z e d in that the moulds (10, 11) and the insertable inserts (16) are provided with a profiled sealing lip (17).
7. A mould according to any one of claims 3 - 6, c h a r a c t e r i z e d in that thehardenable substance of the moulds (10, 11) is the same substance as the one which is to be moulded into the mould.
PCT/SE1990/000739 1990-01-11 1990-11-15 A mould for moulding of a thermosetting substance WO1991010546A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9000090A SE466051B (en) 1990-01-11 1990-01-11 CASTING FOR THE CASTING OF A HARDWARE MATERIAL
SE9000090-2 1990-01-11

Publications (1)

Publication Number Publication Date
WO1991010546A1 true WO1991010546A1 (en) 1991-07-25

Family

ID=20378215

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1990/000739 WO1991010546A1 (en) 1990-01-11 1990-11-15 A mould for moulding of a thermosetting substance

Country Status (3)

Country Link
AU (1) AU6952491A (en)
SE (1) SE466051B (en)
WO (1) WO1991010546A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0499420A1 (en) * 1991-02-12 1992-08-19 British Ceramic Research Limited Mould forming
EP0531629A1 (en) * 1991-09-13 1993-03-17 Rieter-Werke Händle Kg Mould for a roof tile press
EP0665584A1 (en) * 1994-01-27 1995-08-02 " 3P" Licensing B.V. Method for encasing an electronic component with a hardening plastic, electronic components with plastic encasement obtained by this method, and mould for carrying out the method
WO1996033850A1 (en) * 1995-04-28 1996-10-31 Yaschenko Vladimir Grigorievic The method of production of interior-lining articles from gypsum containing materials. form for production of interior-lining articles
US5887846A (en) * 1992-06-16 1999-03-30 Hupp; Jack T. Mold device for forming concrete pathways
WO2022087042A1 (en) * 2020-10-20 2022-04-28 Onsite Icf Construction apparatuses and methods of use thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE145276C1 (en) *
DE1058902B (en) * 1956-02-18 1959-06-04 Alweg Forschung Ges Mit Beschr Insert for a device for the production of precast concrete parts
DE3410751A1 (en) * 1984-03-23 1985-09-26 Bauunternehmung und Betonwerke Lorenz Kesting, 4670 Lünen Process for producing a matrix for facade elements with a structured concrete face surface in a formwork on the matrix
EP0286949A1 (en) * 1987-04-13 1988-10-19 Hötzel-Beton Gmbh Apparatus for making an artificial stone

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE145276C1 (en) *
DE1058902B (en) * 1956-02-18 1959-06-04 Alweg Forschung Ges Mit Beschr Insert for a device for the production of precast concrete parts
DE3410751A1 (en) * 1984-03-23 1985-09-26 Bauunternehmung und Betonwerke Lorenz Kesting, 4670 Lünen Process for producing a matrix for facade elements with a structured concrete face surface in a formwork on the matrix
EP0286949A1 (en) * 1987-04-13 1988-10-19 Hötzel-Beton Gmbh Apparatus for making an artificial stone

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0499420A1 (en) * 1991-02-12 1992-08-19 British Ceramic Research Limited Mould forming
EP0531629A1 (en) * 1991-09-13 1993-03-17 Rieter-Werke Händle Kg Mould for a roof tile press
US5887846A (en) * 1992-06-16 1999-03-30 Hupp; Jack T. Mold device for forming concrete pathways
EP0665584A1 (en) * 1994-01-27 1995-08-02 " 3P" Licensing B.V. Method for encasing an electronic component with a hardening plastic, electronic components with plastic encasement obtained by this method, and mould for carrying out the method
NL9400119A (en) * 1994-01-27 1995-09-01 3P Licensing Bv Method for encapsulating an electronic component with a hardening plastic, electronic components with plastic enclosure obtained by means of this method and mold for carrying out the method.
WO1996033850A1 (en) * 1995-04-28 1996-10-31 Yaschenko Vladimir Grigorievic The method of production of interior-lining articles from gypsum containing materials. form for production of interior-lining articles
EA000226B1 (en) * 1995-04-28 1998-12-24 Владимир Григорьевич ЯЩЕНКО Method of producing decorative and facing articles of gypsum containing materials and a mould therefor
WO2022087042A1 (en) * 2020-10-20 2022-04-28 Onsite Icf Construction apparatuses and methods of use thereof

Also Published As

Publication number Publication date
SE466051B (en) 1991-12-09
AU6952491A (en) 1991-08-05
SE9000090D0 (en) 1990-01-11
SE9000090L (en) 1991-07-12

Similar Documents

Publication Publication Date Title
KR950008553B1 (en) Mold structure for window assembly
US4544588A (en) Hollow bodies of plastic materials
JP4448242B2 (en) Molding auxiliary jig for stiffened panels
US5714106A (en) Process of producing a device including a molded-in insert and fluoroplastic surfacing material
ATE149637T1 (en) PARTIALLY REINFORCED AL CASTING COMPONENT AND METHOD FOR THE PRODUCTION THEREOF
EP0030522A2 (en) A self supporting panel of polyurethane resins or the like, a manufacturing method thereof and an apparatus used therewith
WO1991010546A1 (en) A mould for moulding of a thermosetting substance
EP0904918A3 (en) Injection molding machine with associated securing/clamping assembley and related control system and method
CA2166853A1 (en) Panelling for vehicle bodies
US7870648B2 (en) Disk-shaped object of synthetic thermoplastic material, and method for producing same
US5137674A (en) Method of manufacturing multipart reinforced gaskets
GB2239626A (en) A method of making a mould provided with cooling means
US4285902A (en) Method of molding a re-enforced article
FI93090B (en) Process for producing a T-joint and T-joint formed by means of connecting material between parts to be connected to each other
EP0856389B1 (en) Form for manufacturing resin mold and clamping jig for resin mold
US6450794B1 (en) Auxiliary injection unit for a mould for forming plastics articles having at least two components
EP1192028B1 (en) Improvements in moulding segments of lining for tunnel or pipeline
ES2014723A6 (en) A device for producing a grate construction and a grate construction.
CA2126991A1 (en) Method, barrel subunits and units, service installations and assembly structures for the fabrication of mouldable products, particularly based on concrete
JPS6082753A (en) Improvement in heat collecting plate section and hot-water storage tank nozzle in solar water heater
JPH07260000A (en) Sealed structure
JPH0548732B2 (en)
ES290039U (en) Cheese pressing mould.
JP2691689B2 (en) Manufacturing method of welding transformer for resistance welding
Sakurai et al. Casting Method for Forming a Resin Molding

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA FI HU JP KR NO SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

NENP Non-entry into the national phase

Ref country code: CA