CA2057186A1 - Moulds for casting concrete or other cementitious components - Google Patents
Moulds for casting concrete or other cementitious componentsInfo
- Publication number
- CA2057186A1 CA2057186A1 CA 2057186 CA2057186A CA2057186A1 CA 2057186 A1 CA2057186 A1 CA 2057186A1 CA 2057186 CA2057186 CA 2057186 CA 2057186 A CA2057186 A CA 2057186A CA 2057186 A1 CA2057186 A1 CA 2057186A1
- Authority
- CA
- Canada
- Prior art keywords
- mould
- concrete
- component
- cast
- heating element
- 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.)
- Abandoned
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
- B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
- B28B7/42—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for heating or cooling, e.g. steam jackets, by means of treating agents acting directly on the moulding material
-
- 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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
-
- 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
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
- B28B7/0035—Moulds characterised by the way in which the sidewalls of the mould and the moulded article move with respect to each other during demoulding
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
- ? -ABSTRACT OF THE DISCLOSURE
IMPROVEMENTS IN OR RELATING TO MOULDS FOR
CASTING CONCRETE OR OTHER CEMENTITIOUS COMPONENTS
The disclosure relates to a mould for casting a concrete or other cementitious components, the mould having a mould surface and electric heating means embodied in the mould adjacent the surface to heat the surface and thereby a component being cast in the mould to accelerate curing of the component.
IMPROVEMENTS IN OR RELATING TO MOULDS FOR
CASTING CONCRETE OR OTHER CEMENTITIOUS COMPONENTS
The disclosure relates to a mould for casting a concrete or other cementitious components, the mould having a mould surface and electric heating means embodied in the mould adjacent the surface to heat the surface and thereby a component being cast in the mould to accelerate curing of the component.
Description
IMPROVEMENTS IN OR RELATING TO MOULDS FOR
CASTING CONCRETE OR OTHER CEMENTITIOUS COMPONEN'rS
BACKGROUND OF THE INVENTION
1. Field of the Invention This invention relates to moulds for casting concrete or other cementitious components. The invention is particularly although no~ exclusively applicable to moulds for casting arcuate concrete tunnel lining segments.
CASTING CONCRETE OR OTHER CEMENTITIOUS COMPONEN'rS
BACKGROUND OF THE INVENTION
1. Field of the Invention This invention relates to moulds for casting concrete or other cementitious components. The invention is particularly although no~ exclusively applicable to moulds for casting arcuate concrete tunnel lining segments.
2. Background prior art In the casting of concrete tunnel lining segments it is co~mon to get more than one cast ~rom a mould each working day. In some cases, principly where steel moulds are used (but also concrete) the manufacturer may get one cast say every four to ~ive hours by using a steam chamber to assist in the curing of tha cast conrete. The moulds are put into the chamber or the chamber put over the moulds. The chamber is then filled with steam at a temperature high enough to - give the concrete sufficient strength for removing from the mould in the required time.
Whilst this method works quite welI and gives the desired results, it is nevertheless expensive in terms of energy used, requires extra handling by transferring the moulds into and out of the steam chamber or the steam chamber to and from the moulds;
it can be w~t and messy through steam condensing and consequently requires provision for drainage; the steam plant itself can be relatively axpensive and ~7~
requires maintenance.
SUM~ARY OF THE INVE TION
This invention provides a mould for casting concrete or other cementitious components, the mould having a mould surface and electric heating means embodied in the mould adjac~!nt the surface to heat the surface and thereby a component being cast in the mould to accelerate curing of the component.
By casting electric heating elements into the moulds, the temperature of the wet concrete can be raised to achiPve a more rapid curing of the concrete and thereby similar time for stripping of the cast concrete components from the mould as with the use of st~am. The advantages over the use of steam are that there is a relatively inexpensive energy consumption, I
no extra handling arises as the mould remains static. ~ -;
Working conditions remain relatively clean as there is no possibility of steam condensation affecting the working area. The cost of wiring and associated control equipment is substantially less than the cost of steam plant and the steam chamber.
The invention also provides a mould for casting a concrete or other cementitious component having a device acting on the mould for applying vibration to the mould to consolidate the concrete or other cementatious mix in th~ mould, a chamber enclosing the vibration applying device and engaging the mould around the location where the device acts on the mould and a means for creating ~ vacuum within the chamber to minimize transmission of noise from the vibrating device.
Whilst this method works quite welI and gives the desired results, it is nevertheless expensive in terms of energy used, requires extra handling by transferring the moulds into and out of the steam chamber or the steam chamber to and from the moulds;
it can be w~t and messy through steam condensing and consequently requires provision for drainage; the steam plant itself can be relatively axpensive and ~7~
requires maintenance.
SUM~ARY OF THE INVE TION
This invention provides a mould for casting concrete or other cementitious components, the mould having a mould surface and electric heating means embodied in the mould adjac~!nt the surface to heat the surface and thereby a component being cast in the mould to accelerate curing of the component.
By casting electric heating elements into the moulds, the temperature of the wet concrete can be raised to achiPve a more rapid curing of the concrete and thereby similar time for stripping of the cast concrete components from the mould as with the use of st~am. The advantages over the use of steam are that there is a relatively inexpensive energy consumption, I
no extra handling arises as the mould remains static. ~ -;
Working conditions remain relatively clean as there is no possibility of steam condensation affecting the working area. The cost of wiring and associated control equipment is substantially less than the cost of steam plant and the steam chamber.
The invention also provides a mould for casting a concrete or other cementitious component having a device acting on the mould for applying vibration to the mould to consolidate the concrete or other cementatious mix in th~ mould, a chamber enclosing the vibration applying device and engaging the mould around the location where the device acts on the mould and a means for creating ~ vacuum within the chamber to minimize transmission of noise from the vibrating device.
3 _ By enclosing the vibration device in a chamber and creating a vacuum by means of a vacuum pump, a major source of noise transmitted by the device is removed.
5 sRIEF DESCRIPTION OF THE DRAWINGS
~he following is a description of a specific embodiment of the invention, reference being made to the accompanying drawings in which:
Figure 1 is a side elevation view of a mould for creating arcuate concrete tunnel lining segments:
Figure 2 is a plan view of the mould illustrated in Figure l; and Figure 3 is a plan view o~ a prGduction area showing typical mould layout.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring firstly to Figures 1 and 2 of the drawings, there is shown the base 10 of a mould for forming arcuate concrete tunnel lining segements having a mould cavity indicated at 11 formed in its upper surface and extending between ends 12 of the base.
The cavity has an upwardly facing convexly curved mould surface 13 extending between the ends 12 to : define the inner surface o~ the segment to be cast and the inner sides of the ends 12 are formed with mould surfaces 14 to define the circumferential ends o~ the segment to be cast.
.
An electrical heating element 15 is cast into the body of the base 10 and extends thr~ugh a number of closely spaced turns in a zig-zag pattern parallel to 2 0 ~
5 sRIEF DESCRIPTION OF THE DRAWINGS
~he following is a description of a specific embodiment of the invention, reference being made to the accompanying drawings in which:
Figure 1 is a side elevation view of a mould for creating arcuate concrete tunnel lining segments:
Figure 2 is a plan view of the mould illustrated in Figure l; and Figure 3 is a plan view o~ a prGduction area showing typical mould layout.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring firstly to Figures 1 and 2 of the drawings, there is shown the base 10 of a mould for forming arcuate concrete tunnel lining segements having a mould cavity indicated at 11 formed in its upper surface and extending between ends 12 of the base.
The cavity has an upwardly facing convexly curved mould surface 13 extending between the ends 12 to : define the inner surface o~ the segment to be cast and the inner sides of the ends 12 are formed with mould surfaces 14 to define the circumferential ends o~ the segment to be cast.
.
An electrical heating element 15 is cast into the body of the base 10 and extends thr~ugh a number of closely spaced turns in a zig-zag pattern parallel to 2 0 ~
and just below the mould surface 13 throughout the length of the mould surface. Equally the heating element could follow a zig-zag path across the widkh of the mould. The ends of the heating element 15 terminate in a junction box 16 built into a side wall of the base 10 adjacent the center of the base (or at any other convenient location on the base) and ara connected by leads 17 to a control box and power source (not shown~. A the~nostat unit 18 is mounted lo on the junction box 16 to project into the thicXness of the base and is connected by leads ls to a thermostat control for the power source to the leads.
Thus mould surface 13 can be heated during casting of a concrete segment in the mould to raise the temperature o~ th~ segment and thereby accelerake the curing o~ the segment in the mould.
Figure 3 illustrates the layout of a production area in which a number of rows of moulds lo are mount2d parallel with one another along the length of the workshop area with four moulds in each row. The moulds in each row are connected to a common control box along one side of the production area and the control boxes 20 are all interlinked to a common power supply.
It will be appreciated that in the moulding operation standard side walls are applied to the mould to define the circumferentially extending sides of the segment to be moulded and the outer convex surface of the segment is ~inishsd by hand trowelling in conventional manner. In addition the outer surface of th~ mould can be closed by arcuate cover plates 25 as illustrated in Figure 1. Each cover plat2 is of hollow construction comprising inner and outer plates ,. : ' ; :: .. :, ': . ' . ' . , ', .. ., ' ,, ,, . . , ! - , . ... . .
~ 3 26, 27 spaced hy frame members 28 and a port 29 is formed in the outer surface for a connection to a vacuum supply. The inner plates 26 of the covers are formed with a multiplicity of apertures through which vacuum can be drawn to assi'3t in extracting air from the surface of the concrete to improve the ~inal surface finish of the segment.
To assist in consolidating the concrete in the mould and the extraction of air f;rom the concrete vibration devices 30 are clamped to the mould sides on both sides of the mould to vibrate the mould and thereby consolidate the concrete. In accordance with the present invention, vacuum boxes 31 are fitted to the mould over the vibrators to engage the mould around the vibrators each box having a conduit 32 leading to a vacuum pump to draw vaccum within the box. By extracting the air from the box during the vibration operation, the transmission of noise from the vibriators is minimized.
Thus mould surface 13 can be heated during casting of a concrete segment in the mould to raise the temperature o~ th~ segment and thereby accelerake the curing o~ the segment in the mould.
Figure 3 illustrates the layout of a production area in which a number of rows of moulds lo are mount2d parallel with one another along the length of the workshop area with four moulds in each row. The moulds in each row are connected to a common control box along one side of the production area and the control boxes 20 are all interlinked to a common power supply.
It will be appreciated that in the moulding operation standard side walls are applied to the mould to define the circumferentially extending sides of the segment to be moulded and the outer convex surface of the segment is ~inishsd by hand trowelling in conventional manner. In addition the outer surface of th~ mould can be closed by arcuate cover plates 25 as illustrated in Figure 1. Each cover plat2 is of hollow construction comprising inner and outer plates ,. : ' ; :: .. :, ': . ' . ' . , ', .. ., ' ,, ,, . . , ! - , . ... . .
~ 3 26, 27 spaced hy frame members 28 and a port 29 is formed in the outer surface for a connection to a vacuum supply. The inner plates 26 of the covers are formed with a multiplicity of apertures through which vacuum can be drawn to assi'3t in extracting air from the surface of the concrete to improve the ~inal surface finish of the segment.
To assist in consolidating the concrete in the mould and the extraction of air f;rom the concrete vibration devices 30 are clamped to the mould sides on both sides of the mould to vibrate the mould and thereby consolidate the concrete. In accordance with the present invention, vacuum boxes 31 are fitted to the mould over the vibrators to engage the mould around the vibrators each box having a conduit 32 leading to a vacuum pump to draw vaccum within the box. By extracting the air from the box during the vibration operation, the transmission of noise from the vibriators is minimized.
Claims (8)
1. A mould for casting a concrete or other cementitious components, the mould having a mould surface and electric heating means embodied in the mould adjacent the surface to heat the surface and thereby a component being cast in the mould to accelerate curing of the component.
2. A mould as claimed in Claim 1, wherein the mould is formed from concrete.
3. A mould as claimed in Claim 2, wherein the heating element is cast in the concrete mould adjacent the mould surface.
4. A mould as claimed in Claim 3, wherein the heating element extends in a zig-zag path parallel with the surface of the mould around or across the surface.
5. A mould as claimed in Claim 1, wherein the heating element has a thermostatic control having a probe embodied in the mould adjacent the surface.
6. A mould as claimed in Claim 1, wherein the mould is intended to form arcuate concrete tunnel lining segments, the mould having a convex mould surface to form the inner surface of the segments and the heating element being disposed in the mould parallel with the mould surface.
7. A mould as claimed in Claim 1, wherein a hollow curved plate or plates is/are provided to cover the upper surface of the mould cavity having perforations on the inner side and connected to a source of vacuum to extract air at the surface of the component being cast.
8. A mould for casting a concrete or other cementitious component having a device acting on the mould for applying vibration to the mould to consolidate the concrete or other cementatious mix in the mould, a chamber enclosing the vibration applying device and engaging the mould around the location where the device acts on the mould and a means for creating a vacuum within the chamber to minimize transmission of noise from the vibrating device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909026631A GB9026631D0 (en) | 1990-12-07 | 1990-12-07 | Improvements in or relating to moulds for casting concrete or other cementitious components |
| GB9026631.3 | 1990-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2057186A1 true CA2057186A1 (en) | 1992-06-08 |
Family
ID=10686639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2057186 Abandoned CA2057186A1 (en) | 1990-12-07 | 1991-12-06 | Moulds for casting concrete or other cementitious components |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0490534A3 (en) |
| JP (1) | JPH04301408A (en) |
| CN (1) | CN1063071A (en) |
| AU (1) | AU8832391A (en) |
| CA (1) | CA2057186A1 (en) |
| CS (1) | CS371291A3 (en) |
| GB (1) | GB9026631D0 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0664845B1 (en) | 1992-10-06 | 1999-08-04 | Anchor Wall Systems, Inc. | Composite masonry block |
| AU702985B2 (en) * | 1992-10-06 | 1999-03-11 | Anchor Wall Systems, Inc. | Mold assembly for composite masonry block |
| US5704183A (en) | 1992-10-06 | 1998-01-06 | Anchor Wall Systems, Inc. | Composite masonry block |
| DE19504235A1 (en) * | 1995-02-09 | 1996-08-14 | Ipa Isorast Int | Process for the production of heat-insulated panels for large panel construction |
| FR2732714B1 (en) * | 1995-04-04 | 1997-06-20 | Joseph Froc Ets | REINFORCED CONCRETE PANEL FOR THE MANUFACTURE OF A RESERVOIR, IN PARTICULAR OF A MANURE TANK |
| USD458693S1 (en) | 1996-11-08 | 2002-06-11 | Anchor Wall Systems, Inc. | Retaining wall block |
| US6082057A (en) | 1996-11-08 | 2000-07-04 | Anchor Wall Systems, Inc. | Splitting technique |
| US5879603A (en) | 1996-11-08 | 1999-03-09 | Anchor Wall Systems, Inc. | Process for producing masonry block with roughened surface |
| US6029943A (en) * | 1996-11-08 | 2000-02-29 | Anchor Wall Systems, Inc. | Splitting technique |
| USD445512S1 (en) | 1997-10-27 | 2001-07-24 | Anchor Wall Systems, Inc. | Retaining wall block |
| DE69919432D1 (en) * | 1998-03-11 | 2004-09-23 | Kevin Geraghty | Device for making stairs |
| US6113379A (en) * | 1998-07-02 | 2000-09-05 | Anchor Wall Systems, Inc. | Process for producing masonry block with roughened surface |
| FR2956059B1 (en) * | 2010-02-08 | 2012-11-02 | C B E | ASSEMBLY FOR PRESSURIZING GAS SUPPLY OF A SYSTEM COMPRISING A MOLD AND METHOD OF MANUFACTURING A PRODUCT MADE THEREFROM |
| CN111546487A (en) * | 2020-04-21 | 2020-08-18 | 中铁上海工程局集团第五工程有限公司 | Intelligent production and forming equipment for high-speed rail sleeper |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1517144A (en) * | 1967-02-28 | 1968-03-15 | Molding system for precast concrete elements | |
| US3655847A (en) * | 1969-02-19 | 1972-04-11 | Burton D Morgan | Method for forming concrete panels under compression |
| US3649725A (en) * | 1971-01-28 | 1972-03-14 | Wallace A Olson | Methods for accelerating the curing of concrete |
| US3907951A (en) * | 1971-10-06 | 1975-09-23 | Modular Wall Systems Inc | Method of forming concrete panels using electrically heated mold |
| GB1502291A (en) * | 1974-03-13 | 1978-03-01 | Ito Y | Method and apparatus for manufacturing articles of hydraulic substances |
| US4136849A (en) * | 1975-09-11 | 1979-01-30 | James Carman Abercrombie | Apparatus for manufacturing concrete building sections |
| SU599972A1 (en) * | 1976-11-04 | 1978-04-05 | Конструкторско-Технологическое Бюро С Опытным Производством Института Строительства И Архитектуры Госстроя Белорусской Сср | Vibrated loading device for compacting concrete mixes in a mould |
-
1990
- 1990-12-07 GB GB909026631A patent/GB9026631D0/en active Pending
-
1991
- 1991-11-28 EP EP19910311038 patent/EP0490534A3/en not_active Withdrawn
- 1991-12-02 AU AU88323/91A patent/AU8832391A/en not_active Abandoned
- 1991-12-06 JP JP32339891A patent/JPH04301408A/en active Pending
- 1991-12-06 CA CA 2057186 patent/CA2057186A1/en not_active Abandoned
- 1991-12-06 CS CS913712A patent/CS371291A3/en unknown
- 1991-12-07 CN CN 91111924 patent/CN1063071A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1063071A (en) | 1992-07-29 |
| EP0490534A2 (en) | 1992-06-17 |
| AU8832391A (en) | 1992-06-11 |
| GB9026631D0 (en) | 1991-01-23 |
| JPH04301408A (en) | 1992-10-26 |
| EP0490534A3 (en) | 1992-07-15 |
| CS371291A3 (en) | 1992-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |