CA2324134A1 - Pre-cast concrete slat - Google Patents
Pre-cast concrete slat Download PDFInfo
- Publication number
- CA2324134A1 CA2324134A1 CA 2324134 CA2324134A CA2324134A1 CA 2324134 A1 CA2324134 A1 CA 2324134A1 CA 2324134 CA2324134 CA 2324134 CA 2324134 A CA2324134 A CA 2324134A CA 2324134 A1 CA2324134 A1 CA 2324134A1
- Authority
- CA
- Canada
- Prior art keywords
- concrete
- mould plate
- slat
- mould
- intermediate product
- 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
- 239000011178 precast concrete Substances 0.000 title description 7
- 239000004567 concrete Substances 0.000 claims abstract description 68
- 239000013067 intermediate product Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 244000144972 livestock Species 0.000 description 6
- 238000009408 flooring Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000010828 animal waste Substances 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
- A01K1/0151—Grids; Gratings; Slatted floors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The present invention provides a method of manufacturing a concrete slat comprising the steps of: (a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, (b) applying textured paper across the upper surface, (c) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and (d) rotating the mould about 180° on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product. A wire mesh can be applied across the textured paper between steps (b) and (c).
Description
PRE-CAST CONCRETE SLAT
Field of Invention This invention relates to pre-cast concrete slats and, more particularly, to a method of manufacturing an improved pre-cast concrete slat with a textured surface.
Background of the Invention The pre-cast concrete slats are designed for supporting livestock. Typically, such concrete slats include openings or slots to permit egress of animal wastes, thereby contributing to a cleaner environment for the livestock.
Figure 1 illustrates a cross-sectional elevation view of a mould used in forming a typical prior art concrete slat. Figure 2 illustrates a perspective view of another mould used for such purposes.
The mould includes internal rigid steel cores for forming the above-described openings or slots in the concrete slat.
In order to help prevent livestock from losing their footing on concrete slats, the concrete slat is typically manufactured with a textured non-skid surface. Figure 3 illustrates a typical prior art method of manufacturing such a textured concrete slat. A mould is typically provided including internal steel cores, much like the moulds illustrated in Figures 1 and 2. The concrete is then poured into the cavities of the mould. A rolling wheel having ribs is then rolled across the surface of the poured concrete. In order to ensure that the wheel does not ride on the surface of the internal cores, the wheels are characterized by a width which is less than the width between the individual cores.
If the wheels were to ride on the steel surface of the internal cores, the wheels would not then contact the surface of the poured concrete and would, thereby, not form the textured surface as desired.
However, because the width of the wheels is less than the distance between the internal cores, the wheel is unable to roll across the entire surface of the poured concrete. As a result, the prior art concrete slat is typically formed with raised surfaces at the edges between the slots or openings, with a depression therebetween (see Figures 4 and 5). Unfortunately, moisture is permitted to collect in this depression, thereby making it more uncomfortable for the livestock.
Summary of the Invention It is an obj ect of the present invention to manufacture an improved pre-cast concrete slat with a textured surface.
In its broad aspect, the present invention provides method of manufacturing a concrete slat comprising the steps of: (a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, (b) applying textured paper across the upper surface, (c) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and (d) rotating the mould about 180 ° on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product. The method can also include the step of heating the first intermediate product to effect curing of the first intermediate product and formation of a second intermediate product. A wire mesh can also be applied across the textured paper between steps (b) and (c). The first mould plate can include cores for forming slots in the slat. The first mould plate can further include a base, sidewalls extending from the base to define a perimeter, and internal cores extending from the base and disposed within the perimeter for forming slots in the slat.
The concrete can comprise zero-slump concrete. The textured paper can be creped paper.
In another aspect, the present invention provides a concrete slat manufactured according to a method comprising the steps of: pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, applying textured paper across the upper surface, clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and rotating the mould about 180 °
on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
Field of Invention This invention relates to pre-cast concrete slats and, more particularly, to a method of manufacturing an improved pre-cast concrete slat with a textured surface.
Background of the Invention The pre-cast concrete slats are designed for supporting livestock. Typically, such concrete slats include openings or slots to permit egress of animal wastes, thereby contributing to a cleaner environment for the livestock.
Figure 1 illustrates a cross-sectional elevation view of a mould used in forming a typical prior art concrete slat. Figure 2 illustrates a perspective view of another mould used for such purposes.
The mould includes internal rigid steel cores for forming the above-described openings or slots in the concrete slat.
In order to help prevent livestock from losing their footing on concrete slats, the concrete slat is typically manufactured with a textured non-skid surface. Figure 3 illustrates a typical prior art method of manufacturing such a textured concrete slat. A mould is typically provided including internal steel cores, much like the moulds illustrated in Figures 1 and 2. The concrete is then poured into the cavities of the mould. A rolling wheel having ribs is then rolled across the surface of the poured concrete. In order to ensure that the wheel does not ride on the surface of the internal cores, the wheels are characterized by a width which is less than the width between the individual cores.
If the wheels were to ride on the steel surface of the internal cores, the wheels would not then contact the surface of the poured concrete and would, thereby, not form the textured surface as desired.
However, because the width of the wheels is less than the distance between the internal cores, the wheel is unable to roll across the entire surface of the poured concrete. As a result, the prior art concrete slat is typically formed with raised surfaces at the edges between the slots or openings, with a depression therebetween (see Figures 4 and 5). Unfortunately, moisture is permitted to collect in this depression, thereby making it more uncomfortable for the livestock.
Summary of the Invention It is an obj ect of the present invention to manufacture an improved pre-cast concrete slat with a textured surface.
In its broad aspect, the present invention provides method of manufacturing a concrete slat comprising the steps of: (a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, (b) applying textured paper across the upper surface, (c) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and (d) rotating the mould about 180 ° on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product. The method can also include the step of heating the first intermediate product to effect curing of the first intermediate product and formation of a second intermediate product. A wire mesh can also be applied across the textured paper between steps (b) and (c). The first mould plate can include cores for forming slots in the slat. The first mould plate can further include a base, sidewalls extending from the base to define a perimeter, and internal cores extending from the base and disposed within the perimeter for forming slots in the slat.
The concrete can comprise zero-slump concrete. The textured paper can be creped paper.
In another aspect, the present invention provides a concrete slat manufactured according to a method comprising the steps of: pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, applying textured paper across the upper surface, clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and rotating the mould about 180 °
on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
In a further aspect, the present invention provides a method of manufacturing a concrete slat comprising the steps o~ (a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, (b) applying a flexible sheet across the upper surface, (c) applying a wire mesh across the flexible sheet, (d) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and (e) rotating the mould about 180° on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
In yet a further aspect, the present invention provides a concrete slat manufactured according to the method comprising the steps of: pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, applying a flexible sheet across the upper surface, applying a wire mesh across the flexible sheet, clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and rotating the mould about 180 ° on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
By using gravity to cause poured concrete to press downwardly against an irregular or textured surface, the present invention provides an improved method of manufacturing a concrete slat with a textured upper surface, and avoids the undesirable formation of depressions in the upper surface as persists in prior art methods.
Brief Description of the Drawings Further objects and advantages will appear from the following detailed description of the invention, taken together with the following drawings in which:
Figure 1 is a cross-sectional elevation view of a typical prior art mould used to manufacture a typical concrete slat with a textured non-skid surface;
In yet a further aspect, the present invention provides a concrete slat manufactured according to the method comprising the steps of: pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete, applying a flexible sheet across the upper surface, applying a wire mesh across the flexible sheet, clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis, and rotating the mould about 180 ° on the longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
By using gravity to cause poured concrete to press downwardly against an irregular or textured surface, the present invention provides an improved method of manufacturing a concrete slat with a textured upper surface, and avoids the undesirable formation of depressions in the upper surface as persists in prior art methods.
Brief Description of the Drawings Further objects and advantages will appear from the following detailed description of the invention, taken together with the following drawings in which:
Figure 1 is a cross-sectional elevation view of a typical prior art mould used to manufacture a typical concrete slat with a textured non-skid surface;
Figure 2 is a perspective view of another typical prior art mould used to manufacture a typical prior art concrete slat with a textured non-skid surface;
Figure 3 is a cross-sectional elevation view of a prior art method of manufacturing a typical concrete slat;
Figure 4 is a perspective view of a typical prior art concrete slat with a textured non-skid surface.
Figure 5 is a cross-sectional elevation view of the prior art concrete slat of Figure 4 taken along the lines S-5;
Figure 6 is a top plan view, partly in section, of the prior art concrete slat of Figure 4 taken along the lines 6-6;
Figures 7 to 17 are schematic perspective views of a method of manufacturing a pre-cast concrete slat with a textured non-skid surface of an embodiment of the present invention.
Detailed Description Figure 4 illustrates an embodiment of a livestock slat 10 of the present invention. Slat 10 is substantially rectangular in shape, defined by side edges 12, 14 and end edges 16, 18 which together define perimeter 32 of slat 10. Slat 10 includes a generally horizontal floor 20 with an upper textured flooring surface 22 and a lower surface 23. In one embodiment, flooring surface 22 is ribbed. Depending from floor 20 are a plurality of support beams 24a through 24c. Support beams 24a through 24c extend between the edges 16, 18.
Intermediate the support beams 24a through 24c, the concrete floor 20 is pierced with rows 26 of spaced apart slots 28 which extend through floor 20. Slots 28 are provided to facilitate egress of animal excrement from floor 20, thereby creating a cleaner and safer environment for livestock who are supported on top of slat 10.
Slots 28 are defined by interior endless wall 30 disposed intermediate side edges 12, 14 and end edges 16, 18. In other words, endless wall 30 is disposed within perimeter 32 of slat 10 and remote from side edges 12, 14 and end edges 16, 18. Endless wall 30 is substantially vertical and joins flooring surface 22 to lower surface 23.
Manufacture of slat 10 will now be described with reference to Figures 7 to 17. Slat 10 is formed by a moulding operating using mould 100. Mould 100 includes a first plate 102 and a second plate 104 and includes longitudinal axis 101 (see Figure 12). First plate 102 includes a cavity 106 formed therein. Cavity 106 receives poured concrete which conforms to the shape of cavity 106 to form slat 10. In this respect, cavity 106 is shaped to correspond with desired structural features of slat 10. Typically, cavity 106 is defined by sidewalk 108 and internal cores 110 extending from base 112. Sidewalk 108 define perimeter 109, and internal cores 110 are disposed within perimeter 109.
Internal cores 110 are provided to form slots 28 in slat 10.
Second plate 104 includes a substantially planar surface 114 which supports concrete poured into cavity 106 while slat 10 is being manufactured.
Initially, first plate 102 is spaced apart from second plate 104 (Figure 7).
Wire reinforcing mesh 116 is inserted within cavity 106 (Figure 8). As a next step, concrete 120 is poured from hopper 118 and into cavity 106 and fills the interstitial spaces between internal cores 110. The poured concrete presents an upper surface 122 (Figure 9). Preferably, concrete 120 comprises zero-slump concrete.
Once cavity 106 is filled with concrete, creped or textured paper 124 is applied across the upper surface 122 of the poured concrete and presents an opposing surface 126 to upper surface 122 (Figure 10). Creped paper 124 contributes to the formation of a textured flooring surface 22 in slat as will be described in greater detail below (Figure 10). An example of suitable textured paper 124 is Creped NS craft paper untrimmed Item No. FRDCRP3048 manufactured by Gummed Papers Limited of Brampton, Ontario, Canada.
In one embodiment, after the creped paper 124 has been applied across the upper surface 122, wire mesh 128 is applied across the creped paper 124 such that the wire mesh 128 intersects a plane orthogonal to upper surface 122. Wire mesh 128 contributes to the formation of a ribbed or irregular flooring surface 20 with alternating raised and depressed surfaces. It is understood that creped paper 124 need not be interposed between wire mesh 128 and upper surface 122, and that use of non-textured paper or other flexible sheet also falls within the scope of the invention.
After the creped paper 124 and wire mesh 128 have been applied over and across the poured concrete, second plate 104 descends and seats upon first plate 102, thereby presenting planar surface 114 (Figure 11). Second plate 104 is clamped to first plate 102 to prevent egress of concrete from, and thereby seal, mould 100 in the subsequent operations to be described below.
After second plate 104 is clamped to first plate 102, mould 100 is rotated 180° on longitudinal axis 101, whereby gravity causes poured concrete in cavity 106 to press upon creped paper 124 while being supported by surface 114 of second plate 104 (Figure 12). Impressions are thereby created by the creped paper 124 and wire mesh 128 in the concrete.
Plate 102 and 104 are uncoupled, and first plate 102 is removed from second plate 104, leaving a first intermediate product 130 supported upon second plate 104 (Figure 13) While the first intermediate product 130 is still supported on the second plate 104, the first intermediate product 130 is heated in furnace 132 to effect curing of first intermediate product 130 and formation of second intermediate product 134 (Figure 14) with a longitudinal axis 135 (see Figure 1 S). During the heating operation, temperature inside furnace 132 is maintained within the range of 85 °F to 110 °F. The duration of the heating step is 8-24 hours. After the heating operation, the second intermediate product 134 is removed from the second plate 104 and rotated 180° about longitudinal axis 135 (Figure 15). Next, the creped paper 124 and wire mesh 128 are removed (Figure 16), leaving slat 10 (Figure 17).
Although the disclosure describes and illustrates preferred embodiments of the invention, it is to be understood that the invention is not limited to these particular embodiments. Many variations and modifications will now occur to those skilled in the art. For definition of the invention, reference is to be made to the appended claims.
Figure 3 is a cross-sectional elevation view of a prior art method of manufacturing a typical concrete slat;
Figure 4 is a perspective view of a typical prior art concrete slat with a textured non-skid surface.
Figure 5 is a cross-sectional elevation view of the prior art concrete slat of Figure 4 taken along the lines S-5;
Figure 6 is a top plan view, partly in section, of the prior art concrete slat of Figure 4 taken along the lines 6-6;
Figures 7 to 17 are schematic perspective views of a method of manufacturing a pre-cast concrete slat with a textured non-skid surface of an embodiment of the present invention.
Detailed Description Figure 4 illustrates an embodiment of a livestock slat 10 of the present invention. Slat 10 is substantially rectangular in shape, defined by side edges 12, 14 and end edges 16, 18 which together define perimeter 32 of slat 10. Slat 10 includes a generally horizontal floor 20 with an upper textured flooring surface 22 and a lower surface 23. In one embodiment, flooring surface 22 is ribbed. Depending from floor 20 are a plurality of support beams 24a through 24c. Support beams 24a through 24c extend between the edges 16, 18.
Intermediate the support beams 24a through 24c, the concrete floor 20 is pierced with rows 26 of spaced apart slots 28 which extend through floor 20. Slots 28 are provided to facilitate egress of animal excrement from floor 20, thereby creating a cleaner and safer environment for livestock who are supported on top of slat 10.
Slots 28 are defined by interior endless wall 30 disposed intermediate side edges 12, 14 and end edges 16, 18. In other words, endless wall 30 is disposed within perimeter 32 of slat 10 and remote from side edges 12, 14 and end edges 16, 18. Endless wall 30 is substantially vertical and joins flooring surface 22 to lower surface 23.
Manufacture of slat 10 will now be described with reference to Figures 7 to 17. Slat 10 is formed by a moulding operating using mould 100. Mould 100 includes a first plate 102 and a second plate 104 and includes longitudinal axis 101 (see Figure 12). First plate 102 includes a cavity 106 formed therein. Cavity 106 receives poured concrete which conforms to the shape of cavity 106 to form slat 10. In this respect, cavity 106 is shaped to correspond with desired structural features of slat 10. Typically, cavity 106 is defined by sidewalk 108 and internal cores 110 extending from base 112. Sidewalk 108 define perimeter 109, and internal cores 110 are disposed within perimeter 109.
Internal cores 110 are provided to form slots 28 in slat 10.
Second plate 104 includes a substantially planar surface 114 which supports concrete poured into cavity 106 while slat 10 is being manufactured.
Initially, first plate 102 is spaced apart from second plate 104 (Figure 7).
Wire reinforcing mesh 116 is inserted within cavity 106 (Figure 8). As a next step, concrete 120 is poured from hopper 118 and into cavity 106 and fills the interstitial spaces between internal cores 110. The poured concrete presents an upper surface 122 (Figure 9). Preferably, concrete 120 comprises zero-slump concrete.
Once cavity 106 is filled with concrete, creped or textured paper 124 is applied across the upper surface 122 of the poured concrete and presents an opposing surface 126 to upper surface 122 (Figure 10). Creped paper 124 contributes to the formation of a textured flooring surface 22 in slat as will be described in greater detail below (Figure 10). An example of suitable textured paper 124 is Creped NS craft paper untrimmed Item No. FRDCRP3048 manufactured by Gummed Papers Limited of Brampton, Ontario, Canada.
In one embodiment, after the creped paper 124 has been applied across the upper surface 122, wire mesh 128 is applied across the creped paper 124 such that the wire mesh 128 intersects a plane orthogonal to upper surface 122. Wire mesh 128 contributes to the formation of a ribbed or irregular flooring surface 20 with alternating raised and depressed surfaces. It is understood that creped paper 124 need not be interposed between wire mesh 128 and upper surface 122, and that use of non-textured paper or other flexible sheet also falls within the scope of the invention.
After the creped paper 124 and wire mesh 128 have been applied over and across the poured concrete, second plate 104 descends and seats upon first plate 102, thereby presenting planar surface 114 (Figure 11). Second plate 104 is clamped to first plate 102 to prevent egress of concrete from, and thereby seal, mould 100 in the subsequent operations to be described below.
After second plate 104 is clamped to first plate 102, mould 100 is rotated 180° on longitudinal axis 101, whereby gravity causes poured concrete in cavity 106 to press upon creped paper 124 while being supported by surface 114 of second plate 104 (Figure 12). Impressions are thereby created by the creped paper 124 and wire mesh 128 in the concrete.
Plate 102 and 104 are uncoupled, and first plate 102 is removed from second plate 104, leaving a first intermediate product 130 supported upon second plate 104 (Figure 13) While the first intermediate product 130 is still supported on the second plate 104, the first intermediate product 130 is heated in furnace 132 to effect curing of first intermediate product 130 and formation of second intermediate product 134 (Figure 14) with a longitudinal axis 135 (see Figure 1 S). During the heating operation, temperature inside furnace 132 is maintained within the range of 85 °F to 110 °F. The duration of the heating step is 8-24 hours. After the heating operation, the second intermediate product 134 is removed from the second plate 104 and rotated 180° about longitudinal axis 135 (Figure 15). Next, the creped paper 124 and wire mesh 128 are removed (Figure 16), leaving slat 10 (Figure 17).
Although the disclosure describes and illustrates preferred embodiments of the invention, it is to be understood that the invention is not limited to these particular embodiments. Many variations and modifications will now occur to those skilled in the art. For definition of the invention, reference is to be made to the appended claims.
Claims (14)
1. A method of manufacturing a concrete slat comprising the steps of:
(a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete;
(b) applying textured paper across the upper surface;
(c) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis; and (d) rotating the mould about 180° on said longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
(a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete;
(b) applying textured paper across the upper surface;
(c) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis; and (d) rotating the mould about 180° on said longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
2. The method as claimed in claim 1 further comprising the step of heating the first intermediate product to effect curing of the first intermediate product and formation of a second intermediate product.
3. The method as claimed in claim 1 further comprising the step of applying wire mesh across the textured paper between steps (b) and (c).
4. The method as claimed in claim 1 wherein the first mould plate includes cores for forming slots in the slat.
5. The method as claimed in claim 1 wherein the first mould plate includes a base, sidewalls extending from the base to define a perimeter, and internal cores extending from the base and disposed within the perimeter for forming slots in the slat.
6. The method as claimed in claim 1 wherein the concrete comprises zero-slump concrete.
7. The method as claimed in claim 1 wherein the textured paper is creped paper.
8. A concrete slat manufactured according to the method as claimed in claim 1.
9. A method of manufacturing a concrete slat comprising the steps of:
(a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete;
(b) applying a flexible sheet across the upper surface;
(c) applying a wire mesh across the flexible sheet;
(d) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis; and (e) rotating the mould about 180 ° on said longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
(a) pouring concrete into a cavity of a first mould plate to provide an upper surface of poured concrete;
(b) applying a flexible sheet across the upper surface;
(c) applying a wire mesh across the flexible sheet;
(d) clamping a second mould plate having a planar lower surface onto the first mould plate to seal the first mould plate and thereby form a closed mould having a longitudinal axis; and (e) rotating the mould about 180 ° on said longitudinal axis such that the poured concrete presses downwardly upon the textured paper while being supported by the planar surface of the second mould plate, and thereby forming a first intermediate product.
10. The method as claimed in claim 9 further comprising the step of heating the first intermediate product to effect curing of the first intermediate product and formation of a second intermediate product.
11. The method as claimed in claim 9 wherein the first mould plate includes cores for forming slots in the slat.
12. The method as claimed in claim 9 wherein the first mould plate includes a base, sidewalls extending from the base to define a perimeter, and internal cores extending from the base and disposed within the perimeter for forming slots in the slat.
13. The method as claimed in claim 9 wherein the concrete comprises zero-slump concrete.
14. A concrete slat manufactured according to the method as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2324134 CA2324134A1 (en) | 2000-10-24 | 2000-10-24 | Pre-cast concrete slat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2324134 CA2324134A1 (en) | 2000-10-24 | 2000-10-24 | Pre-cast concrete slat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2324134A1 true CA2324134A1 (en) | 2002-04-24 |
Family
ID=4167452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2324134 Abandoned CA2324134A1 (en) | 2000-10-24 | 2000-10-24 | Pre-cast concrete slat |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2324134A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812893A (en) * | 2010-04-01 | 2010-08-25 | 王金凤 | High-strength composite board |
| CN102845314A (en) * | 2012-10-12 | 2013-01-02 | 内乡县马山口庵北预制构件有限公司 | High-strength anti-skidding cement dropping board |
| EP3120696A1 (en) * | 2015-07-23 | 2017-01-25 | Fournier | Method for the production of gratings and corresponding gratings |
| EP3300870A1 (en) * | 2016-09-07 | 2018-04-04 | Betonwerk Schwarz GmbH | Method and device for producing a longitudinal slot element |
-
2000
- 2000-10-24 CA CA 2324134 patent/CA2324134A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812893A (en) * | 2010-04-01 | 2010-08-25 | 王金凤 | High-strength composite board |
| CN102845314A (en) * | 2012-10-12 | 2013-01-02 | 内乡县马山口庵北预制构件有限公司 | High-strength anti-skidding cement dropping board |
| EP3120696A1 (en) * | 2015-07-23 | 2017-01-25 | Fournier | Method for the production of gratings and corresponding gratings |
| FR3039037A1 (en) * | 2015-07-23 | 2017-01-27 | Fournier | PROCESS FOR PRODUCING CAILLEBOTIS AND CORRESPONDING CAILLEBOTIS |
| EP3300870A1 (en) * | 2016-09-07 | 2018-04-04 | Betonwerk Schwarz GmbH | Method and device for producing a longitudinal slot element |
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