EP0148886A1 - Roof tiles. - Google Patents
Roof tiles.Info
- Publication number
- EP0148886A1 EP0148886A1 EP84902528A EP84902528A EP0148886A1 EP 0148886 A1 EP0148886 A1 EP 0148886A1 EP 84902528 A EP84902528 A EP 84902528A EP 84902528 A EP84902528 A EP 84902528A EP 0148886 A1 EP0148886 A1 EP 0148886A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hopper
- pigments
- tiles
- added
- colouring
- 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.)
- Granted
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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- 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
- B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping
- B28B5/02—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type
- B28B5/026—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length
- B28B5/028—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in, or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length the moulding surfaces being of definite length, e.g. succession of moving pallets, and being continuously fed
Definitions
- This invention relates to roof tiles, and relates in particular to a process and apparatus for manufacturing a novel type of tile.
- Roof tiles are generally made of concrete and, in recent years, considerable efforts have been made to manufacture tiles having distinctive profiles and colours such that an improved appearance on a roof may be obtained.
- the invention provides a process for manufacturing roof tiles comprising introducing tile forming material into a hopper for subsequent discharge onto a succession of moving pallets to form a base ribbon which is compressed and cut into individual tiles, wherein one or more body colouring pigments are added to the material prior to the introduction thereof into the hopper such that the finished tiles are provided with a varying body colour, and wherein one or more secondary colouring pigments are added to the material in the hopper to provide streaks on the tile surface.
- roof tiles formed from a process in accordance with this aspect of the invention have a varying body or base colour and a streaked surface and are thus distinctive in appearance.
- the colours of the pigments added to the material both before and after the introduction thereof into the hopper may vary such that a wide range of differently coloured tiles may be formed.
- red and yellow body colouring pigments may be added alternately to the material before it is introduced into the hopper such that in any batch of tiles the body colour of successive finished tiles varies from red to yellow through shades of orange depending on the mixing in the process.
- three or more different pigments may be added.
- a black secondary pigment may be added to the material within the hopper such that black streaks are provided on the tile surface.
- a number of differently coloured secondary pigments may be introduced into the hopper such that multiple coloured streaks are provided.
- the manner in which the body colouring pigments are added to the material prior to its introduction to the hopper may vary. The process is preferably such that only limited mixing of the body pigments occurs such that the body colour of any particular tile varies and is not simply a uniform combination of the colours of the pigments.
- the different proposals discussed above whereby the base colours of the tiles may be varied in accordance with the first aspect of the invention are themselves novel and may be advantageous regardless of whether or not the upper surfaces of the tiles are streaked by means of a secondary pigment.
- the invention extends to the provision of a tile forming process wherein one or more colouring pigments are added to the tile forming material, prior to the introduction of the material into a hopper, such that the finished tiles have a varying base colour.
- the manner in which the pigments are mixed with the tile forming material affects the body colour variations in the finished tiles.
- a single pigment added to the material prior to the introduction thereof to the hopper and only partially mixed therewith will result in colour variations of the finished tiles between the colour of that pigment and the natural colour of the tile forming material.
- Two pigments similarly only partially mixed with the material outside the hopper will result in colour variations of each tile between the colours of the pigments. It is not however essential for the pigments to be only partially mixed with the tile forming material. For example, batches of material substantially uniformly coloured with different pigments may be introduced into the hopper, and the normal self-mixing of the material occuring in the hopper leads to uneven mixing of the body colours.
- the predominent base colour of the tiles may vary between two or more colours over a production run.
- a combination of the above instances i.e. incomplete mixing of each pigment with the material, and self mixing of batches of differently coloured material in the hopper, will result in random colour variations in each tile in addition to gradual variations in the predomiment base colours during a production run.
- the tile forming material may be supplied to the hopper by means of an elongate rotating screw conveyer which is effective both to mix the tileforming material and to pass it to the hopper.
- the coloured pigments for the body may be added to the material within the conveyor at an appropriate point along its length such that the required degree of mixing of each pigment occurs. The further along the conveyor the pigment is added, the less mixing there will be with the body material.
- Different pigments may be added to the material at appropriately spaced intervals in time such that desired colour variations of the finished tiles are achieved. The time intervals may be regularly or randomly spaced.
- the degree of mixing of each pigment with the material in the conveyor will affect the colour variations in each tile, while the time intervals for which the pigments are added to the material and the degree of self mixing in the hopper may change the predominent base colour throughout a production run.
- the tile forming material may be mixed by means of one or more batch mixers, i.e. a large cylindrical pan or suitable container having a mixing element therein, from which it is transmitted either directly or via a suitable conveyor to the hopper.
- one pigment may be added to one batch mixer and a further pigment added to a second batch mixer such that the material in each mixer has a substantially uniform colour, different to that in the other mixer.
- Material from the two mixers is then introduced into the hopper such that partial mixing occurs either within the hopper itslef or during the conveying of the material to the hopper.
- Material from each mixer may be passed to the hopper at appropriately spaced time intervals such that desired colour variations of the finished tiles throughout a production run are obtained.
- the material may be mixed in a single batch mixer in which case a first pigment is added to one batch, a second pigment to the next and so forth, differently coloured material from subsequent batches being partially mixed in either the hopper or on a conveyer.
- a secondary colouring pigment or pigments may be added to the material within the hopper via supply means which are laterally movable back and forth relative to the hopper such that the position of the streaks on the tiles changes.
- the means for compressing the tile forming material against the pallets includes a roller rotatable about a lateral axis, and it has been found that by adding the secondary pigment or pigments to the surface of the material at a position above the roller, streaks are formed on the top surface of the tile. Lateral movement of the secondary pigment supply means above the roller causes variations in the position of the streaks on the upper surface of the tile. Longitudinal displacement of the supply means away from the roller is undesirable since this alters the depth of the streaks and may result in the streaks being formed unnecessarily below the surface of the tile.
- the method of streaking the surface of the tiles is in itself advantageous, whether or not the body colour is varied and thus viewed from a further aspect the invention provides a process for forming roof tiles comprising introducing tile forming material into a hopper and compressing the material by means of a roller against a succession of longitudinally moving pallets for discharge from the hopper and subsequent cutting into individual tiles, wherein a secondary colouring pigment is added to the material within the hopper by means of laterally movable supply means located above the roller such that streaks of varying position are formed on the upper surface of the tiles.
- the invention also provides apparatus for manufacturing roof tiles including a hopper adapated to receive tile forming material, a roller for compressing the material against a succession of longitudinally moving pallets for discharge from the hopper and subsequent severing into individual tiles, colouring pigment supply means located above the roller, and means for effecting lateral movement of the supply means relative to the hopper.
- the invention provides apparatus for manufacturing roof tiles comprising a hopper adapted to receive therein tile forming material, means for discharging said material onto a succession of longitudinally moving pallets to form a ribbon, means for compressing the ribbon, and means, for cutting the ribbon into individual tiles; first colouring pigment supply means adapted to add two or more body colouring pigments to the material prior to the introduction thereof into the hopper, and second colouring pigment supply means for the supply of one or more secondary pigments to the material within the hopper.
- the second supply means is preferably movable back and forth in a lateral direction relative to the hopper.
- the invention provides a roof tile having a streaked upper surface and a varying body colour.
- Fig. 1 is a diagrammatic view of apparatus taken in accordance with the invention.
- tile forming apparatus includes a hopper 1 adapted to receive tile forming material, e.g. concrete mortar, supplied from a feed conveyor 2 via a chute 3.
- the conveyor 2 includes inlets 4 for dry sand/cement mix and water, and a rotating screw 5 adapted to mix the mortar and urge it towards an outlet 6, disposed above the chute 3.
- a rotating paddle 7 within the hopper urges the mortar down towards a roller 9 which compresses the material onto a succession of pallets 8.
- the pallets 8 are linked together and driven rightwardly as shown in Figure 1.
- the mortar then passes under a slipper 10 which finally compresses the mortar and shapes its upper surface.
- the mortar emerges as a continuous ribbon 11 which is cut into individual tiles 12 by the blade 13 of the guillotine 14. Thereafter, further handling of the tiles is conventional.
- the feed conveyor includes further inlets 15. located towards its outlet end for the supply of a pigment dispersion or slurry to the mortar within the conveyor.
- Two or more differently coloured pigments may be introduced to the mortar at regular or random intervals, and the arrangement is such that partial mixing occurs in the downstream end of the conveyor and in the hopper whereby the finished tiles 12 are provided with a variable base colour.
- red and yellow pigment dispersions may be introduced to the mortar at respective five and ten second time intervals such that the mortar entering the hopper changes in colour from red through various shades of orange to yellow, and then back through orange to red.
- the extruded tiles in any batch thus contain a mixture of these colours in varying degrees.
- Colouring material is also added to the tile forming material within the hopper via tubes 16, and in this way coloured streaks are provided on the upper surface of the ribbon 11. As shown in
- Fig 2 six supply tubes 16 are mounted, in groups of 3, to rail members 17 extending laterally across the hopper, the tubes being coupled to the rotating arms 17 of a motor 18 whereby the tubes are moved back and forth above the roller and the material within the hopper. In this way, the position of the streaks provided on the upper surface of the ribbon changes.
- the illustrated arrangement has a capacity for up to six different streaking colours, and the colouring pigments may be pumped to the tubes 16 at regular or random intervals.
- FIG 3 where secondary hoppers 20 are located above the main hopper 1.
- the secondary hoppers are adapted to receive three differently coloured batches of material, which may be prepared one by one in a single batch mixer, or in three separate batch mixers. Material from the secondary hoppers is released inot the main hopper at appropriate time intervals, and self-mixing in the main hopper is such that the body colour of the tiles varies between the colours of the three batches.
- variable body colour and streaks on the upper surface provides a preferred tile made in accordance with the invention with a distinct and attractive appearance.
Abstract
Un procédé de fabrication de tuiles de toiture consiste à introduire le matériau formant les tuiles dans une trémie (1) en permettant la décharge successive sur une série de palettes mobiles consécutives (8) formant un ruban de base (11) qui est découpé en tuiles individuelles (12). Un ou plusieurs pigments de coloration du corps sont ajoutés au matériau avant son introduction dans la trémie (1), par exemple dans un convoyeur à vis sans fin (2) conduisant à la trémie, et on ajoute un ou plusieurs pigments secondaires de coloration au matériau dans la trémie (1) de manière à obtenir des tuiles présentant des rayures en surface.A method of making roof tiles consists of introducing the material forming the tiles into a hopper (1) allowing the successive discharge on a series of consecutive movable pallets (8) forming a base tape (11) which is cut into tiles individual (12). One or more body coloring pigments are added to the material before it is introduced into the hopper (1), for example in a worm conveyor (2) leading to the hopper, and one or more secondary coloring pigments are added to the material. material in the hopper (1) so as to obtain tiles with scratches on the surface.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84902528T ATE30868T1 (en) | 1983-06-21 | 1984-06-21 | ROOF TILES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB838316833A GB8316833D0 (en) | 1983-06-21 | 1983-06-21 | Roof tiles |
GB8316833 | 1983-06-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0148886A1 true EP0148886A1 (en) | 1985-07-24 |
EP0148886B1 EP0148886B1 (en) | 1987-11-19 |
Family
ID=10544556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84902528A Expired EP0148886B1 (en) | 1983-06-21 | 1984-06-21 | Roof tiles |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0148886B1 (en) |
JP (1) | JPS60501599A (en) |
BR (1) | BR8406933A (en) |
CA (1) | CA1245039A (en) |
DE (1) | DE3467525D1 (en) |
DK (1) | DK153597C (en) |
FI (1) | FI81994C (en) |
GB (1) | GB8316833D0 (en) |
WO (1) | WO1985000135A1 (en) |
ZA (1) | ZA844712B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8813894D0 (en) * | 1988-06-11 | 1988-07-13 | Redland Roof Tiles Ltd | Process for production of concrete building products |
FR2654678B1 (en) * | 1989-11-20 | 1994-04-01 | Efisol | PROCESS AND INSTALLATION FOR THE MANUFACTURE OF COLORED DECORATIVE PANELS BASED ON EXFOLIATED ROCK PARTICLES. |
US5406766A (en) * | 1993-07-29 | 1995-04-18 | Monier Roof Tile Inc. | Multi-color concrete tiles and method and apparatus for making same |
GB2302817B (en) * | 1995-07-05 | 1998-04-22 | Redland Technology Ltd | Improvements in the manufacture of concrete roof tiles |
GB2305386A (en) * | 1995-09-19 | 1997-04-09 | Arisocast Originals Limited | Coloured architectural mouldings |
ES2272117B1 (en) * | 2004-03-10 | 2008-02-01 | Juan Jose Martinez De Gracia | MACHINE FOR THE MANUFACTURE OF BRICKS, TILES AND SIMILAR. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1039148A (en) * | 1975-09-05 | 1978-09-26 | Thomas A. Novak | Relief valve |
GB1577321A (en) * | 1977-02-02 | 1980-10-22 | Redland Roof Tiles Ltd | Manufacture of concrete roofing tiles |
CA1198882A (en) * | 1982-04-08 | 1986-01-07 | Marley Tile A.G. | Roof tiles |
-
1983
- 1983-06-21 GB GB838316833A patent/GB8316833D0/en active Pending
-
1984
- 1984-06-21 ZA ZA844712A patent/ZA844712B/en unknown
- 1984-06-21 WO PCT/GB1984/000218 patent/WO1985000135A1/en active IP Right Grant
- 1984-06-21 CA CA000457128A patent/CA1245039A/en not_active Expired
- 1984-06-21 JP JP59502561A patent/JPS60501599A/en active Pending
- 1984-06-21 EP EP84902528A patent/EP0148886B1/en not_active Expired
- 1984-06-21 BR BR8406933A patent/BR8406933A/en unknown
- 1984-06-21 DE DE8484902528T patent/DE3467525D1/en not_active Expired
-
1985
- 1985-02-15 FI FI850648A patent/FI81994C/en not_active IP Right Cessation
- 1985-02-19 DK DK076685A patent/DK153597C/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO8500135A1 * |
Also Published As
Publication number | Publication date |
---|---|
DK76685A (en) | 1985-02-19 |
ZA844712B (en) | 1985-02-27 |
FI81994C (en) | 1991-01-10 |
JPS60501599A (en) | 1985-09-26 |
DK153597B (en) | 1988-08-01 |
DE3467525D1 (en) | 1987-12-23 |
WO1985000135A1 (en) | 1985-01-17 |
FI850648A0 (en) | 1985-02-15 |
FI850648L (en) | 1985-02-15 |
FI81994B (en) | 1990-09-28 |
EP0148886B1 (en) | 1987-11-19 |
DK153597C (en) | 1988-12-12 |
GB8316833D0 (en) | 1983-07-27 |
BR8406933A (en) | 1985-06-04 |
CA1245039A (en) | 1988-11-22 |
DK76685D0 (en) | 1985-02-19 |
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