CA1061088A - Mold for production of building elements - Google Patents
Mold for production of building elementsInfo
- Publication number
- CA1061088A CA1061088A CA214,446A CA214446A CA1061088A CA 1061088 A CA1061088 A CA 1061088A CA 214446 A CA214446 A CA 214446A CA 1061088 A CA1061088 A CA 1061088A
- Authority
- CA
- Canada
- Prior art keywords
- mould
- cover layer
- rigid plate
- plate
- rigid
- 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.)
- Expired
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
- B28B7/06—Moulds with flexible parts
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
Mould for production of building elements Abstract of disclosure A mould to be used for production of building elements having fixed to one or more sides of it a layer or layers of a somewhat flexible material, which mould is made of an elastically deformable material so as to be bent and stretched away from the cast element when same has been hardened. A
position of the inner surface of said mould consists of a rigid plate to which the layer or layers to be cast fast to the element is held in position during filling of the mould with moulding mass.
position of the inner surface of said mould consists of a rigid plate to which the layer or layers to be cast fast to the element is held in position during filling of the mould with moulding mass.
Description
iOtj1088 Mould for production of building elements This invention relates to a mould of elastically deform-able material for production of cast building elements, prefer-ably from concrete, one or more surfaces of which elements are to be provided with a plastic layer of a somewhat flexible material, such as plastic.
From Swedish PS 219 154 it is known to produce castings of for example concrete, plaster or plastics by introducing the casting material into a mould the inner surface of which is covered by a diaphragm of a flexible material, the diaphragm being held in contact with the inner walls of the mould by vacuum. When the casting is set it may be removed from the mould by replacing the vacuum by a suitable pressurizing.
From Norwegian PS 127 228 it is known to produce one sided open mould pieces of fibre cement using a dish shaped supporting body, which supporting body may be secured by electro-magnets or by a vacuum. Further, from publicly available Norwegian Patent Application 197/68 a method and an apparatus for the production of decorated injection moulded plastic articles are known, a decorative foil being held by vacuum in the female part of the mould, followed by introducing in the mould of a casting material adhering to the foil so that after setting the foil forms an integral part of the moulded article.
From British PS 1 082 254 a method is known for pro-ducing articles of cement conglomerates and a mould to be used therefore. This mould is made from flexible or resilient material and has a rigid outer supporting frame. After the mass having hardened the supporting frame is removed and then the inner elastic mould is pulled off the moulded article which is provided with projecting portions.
As already mentioned the invention relates to a mould for production of bui ~ g elements having at oné or more sides a ~ - 2 -1~10~
layer of a somewhat flexible material, such as plastic, which elements for instance may be staircase steps which at one or more - 2a -108~
sides are to be provided with a layer of plastic. The moulding of such buildinq elements is a complicated procedure since the end product may he provided with sharp edqes, projecting - portions, recesses and different details, and a displacement of the layer during production may render the product unusable.
When vibratinq the mass the layer may easily be displaced so that the product cannot be used. Furthermore, leakage of concrete water will represent a disadvantage.
According to the present invention there is provided a mould for the production of cast buildinq elements from water-containing casting material upon at least a porti/on of the outer surface of which there is integrally cast a~cover layer of a different material, comprising a mould made of elastically deformable material and having a recessed interior portion, a rigid plate-like member positioned within said mould recess having a surface corresponding to the external surface of at least a portion of said cover layer, said mould having pro-jection means in contact with said cover layer for preventing the escape of water from the mould upon vibration of the latter, means cooperating with said rigid plate-like member for main-taining the portion of said cover layer overlaying said rigid plate-like member in close engagement therewith during the moulding process.
In accordance with the present invention portions of the moulding recess of the mould, substantially corresponding with the surface of the plate shaped layer, are formed by a rigid plate which is arranged in the mould and against which a " corresponding surface of the plate shaped layer may be kept in a predictable stable position during the moulding process.
The layer or cover may be secured to the rigid plate by vacuum, -, magnets, double sided adhesive tape or by temporarily supporting bolts. The preferred method for keeping the cover in place in ~ _ 3 _ ., ,i j , the form is by means of vacuum.
The present invention will be further described by reference to the accompanying drawing in which:
Fig. 1 is a vertical section of a mould, in which vacuum is used for keeping a layer of plastic material and a front ledge or "step nose" of plastic material in place during the moulding process, Fig. 2 is a part of another embodiment in which the layer and the nose are kept in position by means of magnets co-operating with reinforcing irons, and Fig. 3 shows in perspective a part of a mould with removable supporting bolts which keep the cover and the nose in position during the first part of the moulding process.
In Fig. 1, an inner mould 1 of elastically deformable material, such as polyurethane, is elastic to such degree that it may, when the moulded article is to be removed -i -?`' - 3a -I ',;
10~8 from the mould, be stretched beyond the protruding portions of the ready moulded product without the mould being damaged. A
rigid outer supporting mould 2 serves to secure the stability of the soft inner mould 1. A rigid, loose plate 3, for instance of steel, forms the substantial part of the bottom of the mould and defines at its inner side a vacuum chamber 4, said plate 3 being gas tightly arranged within a recess of the inner mould, which recess is defined by projecting portions a and b of the mould. In said plate 3 there are arranged along one or more edges through-holes 3', so that the plastic cover will be sucked to the plate when vacuum is applied to the vacuum chamber 4.
~ SAid plate 3 also serves as a flat support for the flexible cover or covers 6 and/or 7 which are to be moulded fast to the article 8. In order to prevent the plate 3 from being bent under the influence of vacuum in chamber 4, there may be arranged dis-tance pieces in said chamber, for instance made from rigid poly-ethylene. The vacuum chamber 4 is connected with a tube 5 which may be connected with a suitable suction pump, not shown.
The covers 6 and 7 to be moulded fast furing the pro-duction are kept in position by being sucked to the plate 3 whichis placed in a recess in the bottom of the mould 1. By means of the projecting portions a and b of the mould, concrete water is prevented from escaping from the mould.
Fig. 1 also shows a front edge ledge or "nose" 7 which is also made from elastic material, such as extruded polyvinyl-chloride. Said ledge is welded or glued to the cover 6 and is kept in water tight manner against the side wall c of the inner mould 1 so that concrete water is also prevented from escaping at this place. The article 8 is in the present case made from concrete which may in case also be provided with reinforcing irons.
The mould according to the invention is used in the 1()f~10~8 following way:
The inner mould 1 with distance elements in the vacuum chamber and with the suction tube 5 is arranged in the rigid outer mould 2, whereupon plate 3 is arranged on the bottom of the mould. Thereupon the cover 6, possibly with the front edge ledge 7 welded or glued thereto, is placed in the form, and `vacuum is applied to the vacuum chamber 4, so that the cover is sucked fast to the plate 3. Then the mould is filled with con-crete and in case also reinforcing iron, whereupon the concrete, if necessary, is~ vibrated so that the mould is completely filled with concrete. After termination of the vibration the vacuum in the chamber 4 is released and the mould placed aside for hardening. After sufficient hardening the outer mould 2 is removed, whereupon the elastically deformable inner mould 1 is turned off the moulded article 8, so that the product is freed from the mould.
By using different inner moulds and corresponding outer moulds different building elements may be produced on one or more of the outer surfaces of which there are moulded fast covers which will be kept in correct position during the moulding pro-cess by means of suction.
Fig. 2 shows an alternative in which the retaining of the covers 6, 7 by means of vacuum has been replaced by magnets 10 which co-operate with reinforcing iron 9 arranged on the bottom of the mould 1 prior to the introduction of the mass.
The same effect may be obtained by instead of using vacuum according to Fig. 1 or electromagnets according to Fig.
From Swedish PS 219 154 it is known to produce castings of for example concrete, plaster or plastics by introducing the casting material into a mould the inner surface of which is covered by a diaphragm of a flexible material, the diaphragm being held in contact with the inner walls of the mould by vacuum. When the casting is set it may be removed from the mould by replacing the vacuum by a suitable pressurizing.
From Norwegian PS 127 228 it is known to produce one sided open mould pieces of fibre cement using a dish shaped supporting body, which supporting body may be secured by electro-magnets or by a vacuum. Further, from publicly available Norwegian Patent Application 197/68 a method and an apparatus for the production of decorated injection moulded plastic articles are known, a decorative foil being held by vacuum in the female part of the mould, followed by introducing in the mould of a casting material adhering to the foil so that after setting the foil forms an integral part of the moulded article.
From British PS 1 082 254 a method is known for pro-ducing articles of cement conglomerates and a mould to be used therefore. This mould is made from flexible or resilient material and has a rigid outer supporting frame. After the mass having hardened the supporting frame is removed and then the inner elastic mould is pulled off the moulded article which is provided with projecting portions.
As already mentioned the invention relates to a mould for production of bui ~ g elements having at oné or more sides a ~ - 2 -1~10~
layer of a somewhat flexible material, such as plastic, which elements for instance may be staircase steps which at one or more - 2a -108~
sides are to be provided with a layer of plastic. The moulding of such buildinq elements is a complicated procedure since the end product may he provided with sharp edqes, projecting - portions, recesses and different details, and a displacement of the layer during production may render the product unusable.
When vibratinq the mass the layer may easily be displaced so that the product cannot be used. Furthermore, leakage of concrete water will represent a disadvantage.
According to the present invention there is provided a mould for the production of cast buildinq elements from water-containing casting material upon at least a porti/on of the outer surface of which there is integrally cast a~cover layer of a different material, comprising a mould made of elastically deformable material and having a recessed interior portion, a rigid plate-like member positioned within said mould recess having a surface corresponding to the external surface of at least a portion of said cover layer, said mould having pro-jection means in contact with said cover layer for preventing the escape of water from the mould upon vibration of the latter, means cooperating with said rigid plate-like member for main-taining the portion of said cover layer overlaying said rigid plate-like member in close engagement therewith during the moulding process.
In accordance with the present invention portions of the moulding recess of the mould, substantially corresponding with the surface of the plate shaped layer, are formed by a rigid plate which is arranged in the mould and against which a " corresponding surface of the plate shaped layer may be kept in a predictable stable position during the moulding process.
The layer or cover may be secured to the rigid plate by vacuum, -, magnets, double sided adhesive tape or by temporarily supporting bolts. The preferred method for keeping the cover in place in ~ _ 3 _ ., ,i j , the form is by means of vacuum.
The present invention will be further described by reference to the accompanying drawing in which:
Fig. 1 is a vertical section of a mould, in which vacuum is used for keeping a layer of plastic material and a front ledge or "step nose" of plastic material in place during the moulding process, Fig. 2 is a part of another embodiment in which the layer and the nose are kept in position by means of magnets co-operating with reinforcing irons, and Fig. 3 shows in perspective a part of a mould with removable supporting bolts which keep the cover and the nose in position during the first part of the moulding process.
In Fig. 1, an inner mould 1 of elastically deformable material, such as polyurethane, is elastic to such degree that it may, when the moulded article is to be removed -i -?`' - 3a -I ',;
10~8 from the mould, be stretched beyond the protruding portions of the ready moulded product without the mould being damaged. A
rigid outer supporting mould 2 serves to secure the stability of the soft inner mould 1. A rigid, loose plate 3, for instance of steel, forms the substantial part of the bottom of the mould and defines at its inner side a vacuum chamber 4, said plate 3 being gas tightly arranged within a recess of the inner mould, which recess is defined by projecting portions a and b of the mould. In said plate 3 there are arranged along one or more edges through-holes 3', so that the plastic cover will be sucked to the plate when vacuum is applied to the vacuum chamber 4.
~ SAid plate 3 also serves as a flat support for the flexible cover or covers 6 and/or 7 which are to be moulded fast to the article 8. In order to prevent the plate 3 from being bent under the influence of vacuum in chamber 4, there may be arranged dis-tance pieces in said chamber, for instance made from rigid poly-ethylene. The vacuum chamber 4 is connected with a tube 5 which may be connected with a suitable suction pump, not shown.
The covers 6 and 7 to be moulded fast furing the pro-duction are kept in position by being sucked to the plate 3 whichis placed in a recess in the bottom of the mould 1. By means of the projecting portions a and b of the mould, concrete water is prevented from escaping from the mould.
Fig. 1 also shows a front edge ledge or "nose" 7 which is also made from elastic material, such as extruded polyvinyl-chloride. Said ledge is welded or glued to the cover 6 and is kept in water tight manner against the side wall c of the inner mould 1 so that concrete water is also prevented from escaping at this place. The article 8 is in the present case made from concrete which may in case also be provided with reinforcing irons.
The mould according to the invention is used in the 1()f~10~8 following way:
The inner mould 1 with distance elements in the vacuum chamber and with the suction tube 5 is arranged in the rigid outer mould 2, whereupon plate 3 is arranged on the bottom of the mould. Thereupon the cover 6, possibly with the front edge ledge 7 welded or glued thereto, is placed in the form, and `vacuum is applied to the vacuum chamber 4, so that the cover is sucked fast to the plate 3. Then the mould is filled with con-crete and in case also reinforcing iron, whereupon the concrete, if necessary, is~ vibrated so that the mould is completely filled with concrete. After termination of the vibration the vacuum in the chamber 4 is released and the mould placed aside for hardening. After sufficient hardening the outer mould 2 is removed, whereupon the elastically deformable inner mould 1 is turned off the moulded article 8, so that the product is freed from the mould.
By using different inner moulds and corresponding outer moulds different building elements may be produced on one or more of the outer surfaces of which there are moulded fast covers which will be kept in correct position during the moulding pro-cess by means of suction.
Fig. 2 shows an alternative in which the retaining of the covers 6, 7 by means of vacuum has been replaced by magnets 10 which co-operate with reinforcing iron 9 arranged on the bottom of the mould 1 prior to the introduction of the mass.
The same effect may be obtained by instead of using vacuum according to Fig. 1 or electromagnets according to Fig.
2 to use a both-sided adhesive tape, one side of which adheres to the upper side of the plate 3 and the other side adheres to the cover 6, 7.
A fourth possibility appears from Fig. 3, in which the inner mould 1, the outer mould 2 and the plate 3 are the samc as ~)610~8 already described. The cover 6 and/or the covers 6 and 7 are arranged in the bottom of the mould, whereupon on this cover or covers there is placed a frame 11 provided with a plurality of conically reduced bolts 12 which are longer than the thickness of the ready article and which will keep the covers 6 and/or 7 in position during introduction ofthe mass. After atleast one half of the mass has been introduced, the frame 11 with bolts 12 may be removed, whereupon the rest of the mass is introduced and the mould is preferably vibrated in order to obtain that the recesses formed by the bolts 13 are completely filled with con-crete.
A fourth possibility appears from Fig. 3, in which the inner mould 1, the outer mould 2 and the plate 3 are the samc as ~)610~8 already described. The cover 6 and/or the covers 6 and 7 are arranged in the bottom of the mould, whereupon on this cover or covers there is placed a frame 11 provided with a plurality of conically reduced bolts 12 which are longer than the thickness of the ready article and which will keep the covers 6 and/or 7 in position during introduction ofthe mass. After atleast one half of the mass has been introduced, the frame 11 with bolts 12 may be removed, whereupon the rest of the mass is introduced and the mould is preferably vibrated in order to obtain that the recesses formed by the bolts 13 are completely filled with con-crete.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED AREDEFINED AS FOLLOWS:
1. A mould for the production of cast building elements from water-containing casting material upon at least a portion of the outer surface of which there is integrally cast a flexible cover layer of a different material, comprising a mould made of elastically deformable material and defining a mould cavity, said mould having an additional interior recess, a rigid plate-like member positioned within said additional mould recess having a surface corresponding to the surface of said mould cavity and the external surface of at least a portion of said cover layer, said mould having projection means in con-tact with said cover layer for preventing the escape of water from the mould upon vibration of the latter, and means cooperat-ing with said rigid plate-like member for maintaining the portion of said cover layer overlaying said rigid plate-like member in close engagement therewith during the moulding process.
2. A mould as claimed in claim 1, wherein said rigid plate is arranged in the mould and has a plurality of through-holes, a recess below the rigid plate and defining together with the rigid plate a chamber connectable with a vacuum source through a tube, thereby forming the means for maintaining said rigid plate in close engagement with said cover layer.
3. A mould as claimed in claim 1, including a plura-lity of electromagnets at the underside of the rigid plate and cooperating with reinforcing irons placed in a mass, said elec-tromagnets when energized pull the reinforcing irons against the cover layer and keep said cover layer in position on the upper side of said plate, thereby forming the means for main-taining said rigid plate in close engagement with said cover layer.
4. A mould as claimed in claim 1, including a frame having conically shaped bolts arranged to rest against the cover layer and keeping said layer in position against the rigid plate said bolts together with the frame being removable from the mould during filling of same with the mass and during vibration of the mould, thereby forming the means for main-taining said rigid plate in close engagement with said cover layer.
5. A mould as claimed in Claim 1, wherein said cover layer is maintained in close engagement with said rigid plate-like member by providing a double-sided adhesive tape adhered to the lower surface of said cover layer and the upper surface of said plate-like member.
6. A mould as defined in Claim 1, wherein said mould includes a rigid outer form receiving said mould of elastically deformable material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO4477/73A NO133357C (en) | 1973-11-23 | 1973-11-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1061088A true CA1061088A (en) | 1979-08-28 |
Family
ID=19880355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA214,446A Expired CA1061088A (en) | 1973-11-23 | 1974-11-22 | Mold for production of building elements |
Country Status (15)
| Country | Link |
|---|---|
| AT (1) | AT334270B (en) |
| BE (1) | BE822482A (en) |
| CA (1) | CA1061088A (en) |
| CH (1) | CH588931A5 (en) |
| DE (1) | DE2455622C3 (en) |
| DK (1) | DK133937B (en) |
| ES (1) | ES432239A1 (en) |
| FI (1) | FI52823C (en) |
| FR (1) | FR2252185B1 (en) |
| GB (1) | GB1454935A (en) |
| IL (1) | IL46138A (en) |
| IT (1) | IT1046798B (en) |
| NL (1) | NL7415271A (en) |
| NO (1) | NO133357C (en) |
| SE (1) | SE418704B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3712480A1 (en) * | 1987-04-13 | 1988-11-03 | Hoetzel Beton Gmbh | DEVICE FOR PRODUCING AN ARTIFICIAL STONE |
| GB9508218D0 (en) * | 1995-04-22 | 1995-06-07 | Pathfinder Traffic Signs Limit | Improvements in or relating to moulded articles |
| JP2002325403A (en) * | 2001-04-27 | 2002-11-08 | Mitsubishi Electric Corp | Magneto, its manufacturing method, and resin molding tool for manufacturing it |
| DE102015100715A1 (en) * | 2015-01-19 | 2016-07-21 | Kennwert RD GmbH | Apparatus and method for producing components made of concrete and concrete components produced therewith |
-
1973
- 1973-11-23 NO NO4477/73A patent/NO133357C/no unknown
-
1974
- 1974-11-21 CH CH1548774A patent/CH588931A5/xx not_active IP Right Cessation
- 1974-11-21 FI FI743376A patent/FI52823C/en active
- 1974-11-21 DK DK605374AA patent/DK133937B/en not_active IP Right Cessation
- 1974-11-21 GB GB5041474A patent/GB1454935A/en not_active Expired
- 1974-11-21 FR FR7438314A patent/FR2252185B1/fr not_active Expired
- 1974-11-21 SE SE7414659A patent/SE418704B/en not_active IP Right Cessation
- 1974-11-22 BE BE2053995A patent/BE822482A/en not_active IP Right Cessation
- 1974-11-22 AT AT937174A patent/AT334270B/en not_active IP Right Cessation
- 1974-11-22 CA CA214,446A patent/CA1061088A/en not_active Expired
- 1974-11-22 NL NL7415271A patent/NL7415271A/en not_active Application Discontinuation
- 1974-11-22 IT IT29719/74A patent/IT1046798B/en active
- 1974-11-23 DE DE2455622A patent/DE2455622C3/en not_active Expired
- 1974-11-23 ES ES432239A patent/ES432239A1/en not_active Expired
- 1974-11-27 IL IL46138A patent/IL46138A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2455622C3 (en) | 1978-11-30 |
| DE2455622A1 (en) | 1975-05-28 |
| FI52823C (en) | 1977-12-12 |
| AT334270B (en) | 1976-01-10 |
| FR2252185B1 (en) | 1978-11-24 |
| DK133937B (en) | 1976-08-16 |
| CH588931A5 (en) | 1977-06-30 |
| DK605374A (en) | 1975-08-04 |
| SE418704B (en) | 1981-06-22 |
| SE7414659L (en) | 1975-05-26 |
| FR2252185A1 (en) | 1975-06-20 |
| NO133357C (en) | 1976-04-28 |
| ATA937174A (en) | 1976-04-15 |
| BE822482A (en) | 1975-03-14 |
| NO133357B (en) | 1976-01-12 |
| IL46138A (en) | 1978-08-31 |
| NO447773L (en) | 1975-05-26 |
| DE2455622B2 (en) | 1978-03-30 |
| IL46138A0 (en) | 1975-08-31 |
| IT1046798B (en) | 1980-07-31 |
| FI52823B (en) | 1977-08-31 |
| FI337674A (en) | 1975-05-24 |
| ES432239A1 (en) | 1976-11-01 |
| DK133937C (en) | 1977-01-24 |
| GB1454935A (en) | 1976-11-10 |
| NL7415271A (en) | 1975-05-27 |
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