EP0833727B1 - A method for production of reinforcement spacers and a mould for use in the production - Google Patents
A method for production of reinforcement spacers and a mould for use in the production Download PDFInfo
- Publication number
- EP0833727B1 EP0833727B1 EP95921174A EP95921174A EP0833727B1 EP 0833727 B1 EP0833727 B1 EP 0833727B1 EP 95921174 A EP95921174 A EP 95921174A EP 95921174 A EP95921174 A EP 95921174A EP 0833727 B1 EP0833727 B1 EP 0833727B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mould
- reinforcement
- production
- spacers
- reinforcement spacers
- 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 - Lifetime
Links
Images
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
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
- B28B7/348—Moulds, cores, or mandrels of special material, e.g. destructible materials of plastic material or rubber
-
- 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
- B28B7/0064—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces
-
- 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
- B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
- B28B7/18—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes the holes passing completely through the article
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
Definitions
- the present invention concerns a method for production of reinforcement spacers in concrete for use in steel-armoured concrete structures, together with a mould for use in production of the reinforcement spacers (see f.i. document DE-A-2 522 018).
- Reinforcement spacers are used in order to position reinforcement steel which is provided in casting moulds, both before and during filling of the casting moulds with concrete.
- the reinforcement spacers can be made of various materials, such as, e.g., plastic, extruded concrete.
- the problems involved in using known reinforcement spacers can be divided into the following two categories:
- the object of the present invention is to provide a method for production of reinforcement spacers which avoids the above-mentioned disadvantages, and a mould for use in connection with the method.
- the design according to the invention increases the contact surface between concrete and reinforcement spacer, and by means of cut-outs and through-going holes the reinforcement spacer is secured against sliding out of the completed concrete structure.
- the principle of the invention consists in the fact that the method for production of reinforcement spacers for use in steel-armoured concrete structures and the casting mould for use in the production of the reinforcement spacers is designed in such a manner that completed reinforcement spacers both with cut-outs and holes can be removed without having to destroy the casting mould.
- Fig. 1 illustrates a reinforcement spacer 1 which consists of a base part 2 to abut against the foundation and which in a first upper surface 3, opposite the base part 2, is provided with a cut-out or recess to abut against a reinforcement steel (not shown), and where in a second upper surface, opposite the base part 2, there is provided a through-going hole 4 for mounting it on to the foundation, e.g. by means of nails.
- a through-going hole 5 in the area of the cut-out 3, for mounting the reinforcement spacer 1 by means of binding wire to the reinforcement bar.
- the reinforcement spacer 1 is also provided with further cut-outs or grooves 6 and recesses 7 in order to increase the contact surface between reinforcement spacer and concrete and thereby provide maximum binding power to the surrounding concrete.
- one of the largest side surfaces is completely flat.
- the base part 2 is designed with least possible contact with the formwork in order to reduce the surface of the part of the reinforcement spacer which will be aligned with the completed concrete, and thereby reduce the penetration of moisture between reinforcement spacer and the surrounding concrete.
- Fig. 3 is a partial section of a casting mould 9 for the production of reinforcement spacers in concrete.
- step 1 With respect to steps 1 to 6, these apply to production of the actual rubber mould 9, while step 7 concerns the actual production of reinforcement spacers in concrete for use in steel-armoured concrete structures.
- reinforcement spacers are cast in moulds made of two-component rubber mass, which makes the casting moulds very flexible, it is thereby possible to produce reinforcement spacers supplied with cut-outs 6, recesses 7 and through-going holes 4,5, while at the same time the nature of the rubber moulds as opposed to known designs permits the moulds to be re-used.
- the strength of the reinforcement spacers is particularly due to the fact that they are cast in moulds of heat-insulating materials, and thus maintain a stable temperature during the hardening process.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Reinforcement Elements For Buildings (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Description
Claims (5)
- A method for production of reinforcement spacers in concrete for use in steel-armoured concrete structures,
characterized in that the reinforcement spacers are cast in a mould of a material which is elastic, preferably a two-component rubber mass, and that after hardening the reinforcement spacers are removed by elastically bending the mould's wall parts. - A method according to claim 1,
characterized in that the reinforcement spacers are cast in a mould which is formed by casting the mould walls in a box, in which there are provided one or more models, e.g. plaster models of the reinforcement spacers. - A mould for use in production of reinforcement spacers according to claim 1, wherein the mould has walls adapted to the shape of the reinforcement spacers,
characterized in that it is made of an elastic material, especially a two-component rubber mass. - A mould according to claim 3,
characterized in that there is provided a releasable metal rod perpendicularly through the mould's wall parts, for the production of through-going mounting holes in the reinforcement spacer. - A mould according to claim 3,
characterized in that it is designed for casting several reinforcement spacers at a time.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO940755A NO179291C (en) | 1994-03-04 | 1994-03-04 | Reinforcement chairs in molded concrete |
PCT/NO1995/000082 WO1996037351A1 (en) | 1994-03-04 | 1995-05-26 | A method for production of reinforcement chairs and a mould for use in the production |
CA002219825A CA2219825C (en) | 1994-03-04 | 1995-05-26 | A method for production of reinforcement chairs and a mould for use in the production |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0833727A1 EP0833727A1 (en) | 1998-04-08 |
EP0833727B1 true EP0833727B1 (en) | 2000-10-04 |
Family
ID=27170507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95921174A Expired - Lifetime EP0833727B1 (en) | 1994-03-04 | 1995-05-26 | A method for production of reinforcement spacers and a mould for use in the production |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0833727B1 (en) |
CA (1) | CA2219825C (en) |
FI (1) | FI974324A (en) |
NO (1) | NO179291C (en) |
WO (1) | WO1996037351A1 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2522018A1 (en) * | 1975-05-17 | 1976-12-02 | Paech Peter | Concrete structure reinforcing elements spacer - incorporating cement-content base, and connecting element shaped to fit reinforcement |
DE2540065A1 (en) * | 1975-09-09 | 1977-03-17 | Fritz Koehlmann | Dowel plugs for concrete steel reinforcing mesh laying - are clamped or clipped and adjustable, with meshes laid round them |
DE2846391A1 (en) * | 1978-10-25 | 1980-05-08 | Dasag Deutsche Naturasphalt Gm | Concrete block vibratory mould - has rubber lining on bottom supporting surfaces of outer frame and partitions |
-
1994
- 1994-03-04 NO NO940755A patent/NO179291C/en unknown
-
1995
- 1995-05-26 WO PCT/NO1995/000082 patent/WO1996037351A1/en active IP Right Grant
- 1995-05-26 EP EP95921174A patent/EP0833727B1/en not_active Expired - Lifetime
- 1995-05-26 CA CA002219825A patent/CA2219825C/en not_active Expired - Fee Related
-
1997
- 1997-11-25 FI FI974324A patent/FI974324A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CA2219825C (en) | 2001-05-22 |
NO179291B (en) | 1996-06-03 |
NO940755D0 (en) | 1994-03-04 |
WO1996037351A1 (en) | 1996-11-28 |
EP0833727A1 (en) | 1998-04-08 |
NO179291C (en) | 1996-09-11 |
CA2219825A1 (en) | 1996-11-28 |
NO940755L (en) | 1995-09-05 |
FI974324A0 (en) | 1997-11-25 |
FI974324A (en) | 1997-11-25 |
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