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EP0024980A1 - Selbstreinigende Vorrichtung zum Giessen von Gips - Google Patents

Selbstreinigende Vorrichtung zum Giessen von Gips Download PDF

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Publication number
EP0024980A1
EP0024980A1 EP80401198A EP80401198A EP0024980A1 EP 0024980 A1 EP0024980 A1 EP 0024980A1 EP 80401198 A EP80401198 A EP 80401198A EP 80401198 A EP80401198 A EP 80401198A EP 0024980 A1 EP0024980 A1 EP 0024980A1
Authority
EP
European Patent Office
Prior art keywords
tank
mixture
casting
cylinder
hearth
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
Application number
EP80401198A
Other languages
English (en)
French (fr)
Other versions
EP0024980B1 (de
Inventor
Jacques Lanneau
Adrien Delcoigne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Isover SA France
Original Assignee
Saint Gobain Isover SA France
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saint Gobain Isover SA France filed Critical Saint Gobain Isover SA France
Priority to AT80401198T priority Critical patent/ATE4033T1/de
Publication of EP0024980A1 publication Critical patent/EP0024980A1/de
Application granted granted Critical
Publication of EP0024980B1 publication Critical patent/EP0024980B1/de
Expired legal-status Critical Current

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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
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/0006—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects the reinforcement consisting of aligned, non-metal reinforcing elements
    • 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
    • B28B5/027—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 the indefinite length type, e.g. belts, and being continuously fed

Definitions

  • the present invention relates to the manufacture of plaster objects, essentially in the form of a plate, and more specifically to the casting on a pouring floor movable in translation of a mixture of plaster and water contained in a bottomless tank. placed on said casting hearth.
  • the mixture is introduced through the supply tubes with a certain speed, so as to create agitation in the tank and is vibrated the front and rear plates using vibrators mounted on the plates themselves; when reinforcements must be placed inside the products that we manufacture, in some cases we arrange to introduce said reinforcements by rubbing them on the lower edge of one and / or the other of the front plates and rear of the tank.
  • the invention proposes to renew the rear wall, preferably continuously, without disturbing the pouring or the agitation.
  • One solution to achieve this is to integrate it into a larger surface that is moved, periodically or continuously, so as to present a portion of different surface area in front of the tank, while the portion taken out of service is cleaned in waiting to be represented in front of the tank to play again the role of rear wall.
  • this surface is materialized by a flat plate which is made to slide facing the casting tank; in other embodiments, the surface is curved and it is rotated to present a different portion facing the reservoir.
  • This curved surface can be a rotating drum with a vertical axis, either of a diameter equal to the width of the casting hearth and then bearing on the lateral bands during their journey, or of a larger diameter and taking then press only on the ends of the side bands.
  • the operations of renewing the rear plate, cleaning the rear plate and guiding the reinforcement are combined, constituting the curved surface of which the rear plate is a portion by a cylindrical roller. , of horizontal axis perpendicular to the direction of advancement of the casting hearth, and of width equal to that of this casting hearth.
  • This cylinder is rotated, the reinforcement that one wishes to have in the poured product, introduced in support on its lower portion, rubs on it and cleans it.
  • the cylinder is rotated in the opposite direction to the direction of progression of the reinforcement driven by the cast product.
  • the speed of rotation of the roller or possibly the frequency and the angle of the rotation when it is discontinuous, are such that a point on its surface which comes into contact with the liquid mixture of plaster and water is put out of contact of the mixture and cleaned in a sufficiently short time so that the plaster deposited at this point does not have time to set.
  • the front plate is given a domed shape with horizontal bending axis perpendicular to the direction of advance of the casting hearth and we introduce this reinforcement resting on this curved surface.
  • the tubes for supplying new product are then independent of the front plate; the feed is done by a feed ramp arranged between the two front and rear plates as close as possible to the front plate.
  • Figure 1 shows an installation for pouring a liquid mixture based on plaster and water.
  • this mixture may contain other substances such as accelerators or retarders, reinforcing elements such as cut fibers, fillers, surfactants, thinners, resins, foams, etc. ., which will not be mentioned later, it will simply be called a mixture of plaster and water.
  • the casting installation comprises a horizontal casting hearth 1, movable in translation in the direction of arrow F, two lateral strips 2 and 3 each rotating around two rollers 4 and 5 and forming vertical edges at the casting hearth, a front wall 6 in the form of a vertical plate perpendicular to the direction of advancement of the floor 1 and a rear plate 7 parallel to the front wall 6, bearing on the ends of the lateral bands 2 and 3.
  • the rear plate 7 has a length sufficient to form at least two portions 7a and 7b arranged side by side, each capable of forming the rear wall of the casting tank e. It is slidably mounted on two vertical slides 8 and 9. Periodically, the plate 7 is slid in these slides so as to deactivate the portion which closed the tank, for example the portion 7a, and to replace it with the other, in this case the portion 7b. The portion 7a is then cleaned and it is ready to be put into service again in place of the portion 7b.
  • the slides are high enough to allow the height positions of the plate 7 to be adjusted.
  • the plate 7 may have its lower edge covered by a bead 10, or may carry a curved flap, directed outside the tank to guide the introduction of a reinforcement in the product that is manufactured.
  • FIG. 2 shows a pouring head of the same type but in which the rear wall of the tank is a cylindrical drum 11 with a vertical axis 12, the diameter of which is equal to the width of the casting sole 1.
  • the axis 12 of this cylinder 11 is arranged so that the front of the cylinder, which acts as the rear wall of the casting tank, rests on the floor 1.
  • the cylinder 11 is in contact by its two generators diametrically opposite with the side bands 2 and 3 and it has on its underside a seal 13 which seals with the casting hearth, 1.
  • the axis 12 of the cylinder 11 is equipped with a pinion 14 connected by a chain 15 to a motor 16 for the rotation drive.
  • these means are placed so as to act on the portion of cylinder wet with plaster which has just left the reservoir, that is to say near the side shown in the figure when the cylinder rotates in the direction of arrow I.
  • this cylinder is suspended by its axis, and it can then be entirely located above the movable casting hearth.
  • this advantageous assembly makes it possible to introduce a reinforcement into the product, near the lower surface, by causing it to arrive under the drum 11.
  • a reinforcement introducer 19 independent, in the form of a horizontal and transverse bar, or curved shutter, will be arranged at the rear of the drum 11.
  • the front plate 6 is surmounted by a vibrator 20 and it is crossed by tubes 21 for supplying the mixture.
  • a vibrator 20 As also explained in this document, the front plate 6 is surmounted by a vibrator 20 and it is crossed by tubes 21 for supplying the mixture.
  • the front wall 6 of the pouring tank can be curved so that the energy per unit volume of mixture contained in the tank, supplied by the jets through the supply tubes 21, s ' oit substantially the same in the center and on the edges of the tank.
  • the drum 11 is supported on the ends of the side bands 2 and 3 and it is of larger diameter allowing to have a tank of practically rectangular surface, better agitated by the supply jets than the tank previous to two pointed corners, adjacent to the drum.
  • the drums 11 are of thickness substantially equal to the height of the front plate, and at least sufficiently thick to contain the mixture without overflowing. They are mounted on slide so that their distance from the front plate can be adjusted and located at such a distance from the latter that the adjustments made in the case of a fixed and flat rear plate are not modified. The explanation of these settings will be given later.
  • the cylinder 11 is rotated, either continuously or discontinuously, at a speed such that a point on its surface in contact with the plaster mixture at a given time either removed from the tank and cleaned by the cleaning means 17 and 18 before the plaster which has deposited there has had time to set, or times of the order of 2 min for a plaster without setting modifier.
  • the curved surface of which a portion forms the rear wall of the casting tank is a cylindrical roller 22 with horizontal axis 23, of length equal to the distance between the side bands 2 and 3 so that the seal between said bands and the cylinder is obtained.
  • the shaft of this cylinder rotates in bearings 24 mounted on a support with two slides 25, one vertical, the other horizontal so as to allow the height adjustment and the adjustment of the distance relative to the front plate.
  • the axis of this roller 22 is connected to a motor 26 capable of driving it in rotation.
  • a sealing shoe 27 having substantially the shape of a prism but the upper surface of which is concave can be placed at the rear of the roller 22.
  • This sealing shoe 27 is mounted on horizontal slides 28 allowing its correct positioning.
  • the roller 22 has a sufficiently large diameter so that its axis can pass over the side bands 2 and 3, so as to be supported and driven by the motor 26. A diameter of the order of 30 cm will be common. It may be a roll of cast iron, steel, plastic, etc., preferably a material which is not very porous and hard.
  • the front plate can be given a domed shape with horizontal generatrixes perpendicular to the direction of advance of the casting hearth.
  • this convex shape of the front plate can be envisaged with all the variants of rear wall: flat wall, drum wall with vertical axis or roll wall with horizontal axis .
  • the roller 29 of storage of the reinforcement 30 that is introduced inside the tank is disposed in front of the front plate or at least vertically above it so that said reinforcement 30 rubs on the surface of said front plate 6.
  • a ramp 35 independent of the front plate 6.
  • the ramp 35 is a tube of length equal to the width of the casting head, provided with a row of orifices 36, connected in the middle of its length, by a tube 37, to the means producing the mixture of plaster and water.
  • This ramp is disposed between the two front and rear plates of the bucket, parallel to said plates, as close as possible to the front plate, is immersed in the mixture so that the jets of mixture which it delivers through orifices 36 are submerged like the jets delivered by the tubes 21 through the front plate in the other embodiments, or placed immediately above the free surface of the liquid, with orifices 36 slightly inclined downwards so that the jets , while rapidly penetrating into the mixture, produce the necessary agitation.
  • the orifices 36 are distributed like the supply tubes 21 which pass through the front plate in the other embodiments.
  • the energies of all the jets exiting the ramp are identical, the sections of the orifices are growing from the middle of the ramp towards its ends.
  • the procedure is as follows. First, the height of the roller 22 is adjusted relative to the casting floor 1 by adjusting the position of the bearings 24 on the vertical slides 25. The lower generator of the roller 22 must be at an equal distance from the casting floor at the height at which you want to position the reinforcement in the thickness of the product.
  • the procedure is as if it were a flat and fixed rear plate; that is to say that once fixed the feed rate of the mixture for manufacturing products in plates of a given thickness at the chosen speed of the casting hearth, the number of feed tubes capable of producing agitation over the entire width of the head is determined casting, we determine the section of the supply tubes and pipes upstream so that the speed of mixing prohibits deposits, that is to say, is greater than 10 cm / s, we create the casting slot under the front plate 6, we adjust the distance from the front plate to the roller or rear drum so as to have, in the pouring tank, a stable mixing level and- submerged supply jets. Distances between the front plate and the front generator of the roller of the order of 10 cm will frequently be encountered.
  • the reinforcements are then introduced by dispersing their storage rollers so that the reinforcements well sweep the surfaces which they are responsible for cleaning.
  • a reinforcement 31 is passed under the roller 22 and then under the front plate 6.
  • the reinforcement driven by the casting, stretches.
  • the storage roller 32 of the reinforcement 31 is placed so that the reinforcement 31 winds at least a quarter and preferably a third of the rear roller 22.
  • the reinforcement 31 will descend vertically until contact with roller 22.
  • the sealing part 27 will be advanced under the roller 22 to stop this leak. It can be seen that with a roller 22 30 cm in diameter, spaced 6 mm from the casting hearth, under which passes a mat of entangled continuous wires 2.5 mm thick in the free state, with speeds from the 1.50 m to 3 m / min casting bottom, there is no leakage. The leak only appears if the space is increased by 1 or 2 mm.
  • the speed of rotation of the roller 22 or of the drum 11 is then adjusted, so that a point on the roller does not remain in the plaster or covered with plaster without being cleaned for more than a time of the order of 2 min. , corresponding to the time necessary for the plaster to start setting.
  • a mixing height of approximately 15 mm in the tank a peripheral speed between 1 cm / min and 10 cm / min will be suitable, and a speed of the order of 3 cm will be commonly chosen.
  • the rotation speed should not be too high, so as not to disturb the casting. If the rotation is sequential, rotations will be made approximately every minute, at an angle such that the constraints already stated are respected.
  • these grids are made up of orthogonal wires welded to each other, with all of the "warp” wires entirely on one side of the grid mid-plane, and all of the "weft” wires entirely of the other side of this same plane, we will choose to put in contact with the curved front wall those of the wires which will be the most transverse to the direction of travel of said grids, or in other words most parallel to the plane of the casting hearth, to favor cleaning this wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Detergent Compositions (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Chain Conveyers (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Fats And Perfumes (AREA)
  • Continuous Casting (AREA)
  • Working Measures On Existing Buildindgs (AREA)
EP80401198A 1979-08-21 1980-08-20 Selbstreinigende Vorrichtung zum Giessen von Gips Expired EP0024980B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401198T ATE4033T1 (de) 1979-08-21 1980-08-20 Selbstreinigende vorrichtung zum giessen von gips.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7921038 1979-08-21
FR7921038A FR2463669A1 (fr) 1979-08-21 1979-08-21 Dispositif autonettoyant pour la coulee du platre

Publications (2)

Publication Number Publication Date
EP0024980A1 true EP0024980A1 (de) 1981-03-11
EP0024980B1 EP0024980B1 (de) 1983-07-06

Family

ID=9228966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401198A Expired EP0024980B1 (de) 1979-08-21 1980-08-20 Selbstreinigende Vorrichtung zum Giessen von Gips

Country Status (17)

Country Link
US (1) US4345887A (de)
EP (1) EP0024980B1 (de)
JP (1) JPS5634413A (de)
AT (1) ATE4033T1 (de)
AU (1) AU540274B2 (de)
BR (1) BR8005280A (de)
CA (1) CA1164634A (de)
DE (1) DE3064044D1 (de)
DK (1) DK357780A (de)
ES (1) ES494366A0 (de)
FR (1) FR2463669A1 (de)
GR (1) GR69665B (de)
IE (1) IE50046B1 (de)
MX (1) MX150741A (de)
PL (1) PL125717B1 (de)
PT (1) PT71716B (de)
ZA (1) ZA805128B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399308B (de) * 1993-04-29 1995-04-25 Eternit Werke Hatschek L Verfahren und anlagen zur herstellung von aus fasern und hydraulischem bindemittel bestehenden produkten
US7364676B2 (en) * 2005-09-01 2008-04-29 United States Gypsum Company Slurry spreader for cementitious board production
DE102012103648A1 (de) * 2012-04-25 2013-10-31 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Rakelvorrichtung zum Aufrakeln einer Harzpaste auf eine Trägerfolie und eine Harzmattenanlage zur Herstellung von Harzmatten
US10639654B2 (en) 2016-07-06 2020-05-05 United States Gypsum Company Gypsum slurry application modifier
US20230286188A1 (en) * 2020-07-29 2023-09-14 Joseph Norris Apparatus and method for continuously casting a member from a settable material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230074A (en) * 1939-04-07 1941-01-28 Riegel Textile Corp Tile manufacture
US3979171A (en) * 1974-11-29 1976-09-07 Nagy Robert H Concrete plank machine with wire mesh guide

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1036125A (en) * 1912-06-25 1912-08-20 J B King & Co Plaster-board machine.
US1489693A (en) * 1922-09-25 1924-04-08 United States Gypsum Co Machine and method for making hardened-edged plaster board
US1719199A (en) * 1925-10-12 1929-07-02 Schumacher John Apparatus for printing wall board
GB656846A (en) * 1939-09-08 1951-09-05 Magnani Alessandro Improvements relating to the manufacture of fibrous cement sheets
US2393213A (en) * 1943-02-27 1946-01-15 Willard Storage Battery Co Casting machine
US3109763A (en) * 1955-09-20 1963-11-05 Johns Manville Fiber Glass Inc Method and apparatus for forming a fiber reinforced resin panel
US3235400A (en) * 1961-03-22 1966-02-15 Union Carbide Corp Metering foam coating
US3167603A (en) * 1961-03-31 1965-01-26 Union Carbide Corp Process and apparatus for producing laminated panels
US3276072A (en) * 1963-09-11 1966-10-04 Nylonge Corp Apparatus for forming regenerated cellulose sponge
US3288275A (en) * 1965-12-06 1966-11-29 Koppers Co Inc Method and apparatus for cleaning conveyor belts
US3532576A (en) * 1966-06-20 1970-10-06 Nat Gypsum Co Apparatus for making gypsum board
US3541639A (en) * 1967-01-23 1970-11-24 Enroc Lab Dev Co Apparatus for making an athletic mat member
US3462795A (en) * 1967-09-18 1969-08-26 Admiral Equipment Corp Double belt for manufacture of panels and the like
US3697205A (en) * 1969-07-02 1972-10-10 Kaiser Aluminium Chem Corp Mold system and apparatus for producing a composite panel
US3773452A (en) * 1970-05-12 1973-11-20 J Taga Apparatus for molding thermoplastic materials
GB1329418A (en) * 1970-05-26 1973-09-05 Go Con Concrete Ltd Dispensing of a material into a mould
US3832099A (en) * 1971-08-24 1974-08-27 Uniform Ag Apparatus for producing polyurethane foam
US3832250A (en) * 1972-07-24 1974-08-27 Johns Manville Method of forming gypsum boards with hardening edges
DE2344963A1 (de) * 1972-09-11 1974-05-02 Unifoam Ag Vorrichtung zur kontinuierlichen herstellung von polymerschaumstraengen
GB1431732A (en) * 1973-01-18 1976-04-14 Mitsubishi Rayon Co Apparatus and process for continuously producing a sheet shaped product
US3867494A (en) * 1973-03-06 1975-02-18 Owens Corning Fiberglass Corp Method and apparatus for producing fiber reinforced organic foam
SE386617B (sv) * 1974-11-20 1976-08-16 Gullfiber Ab Anordning for framstellning av en kontinuerlig streng av poros termoplast

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230074A (en) * 1939-04-07 1941-01-28 Riegel Textile Corp Tile manufacture
US3979171A (en) * 1974-11-29 1976-09-07 Nagy Robert H Concrete plank machine with wire mesh guide

Also Published As

Publication number Publication date
PL226318A1 (de) 1981-09-04
ES8104039A1 (es) 1981-04-01
BR8005280A (pt) 1981-03-04
ZA805128B (en) 1981-09-30
FR2463669B1 (de) 1982-10-08
IE801755L (en) 1981-02-21
DK357780A (da) 1981-02-22
PT71716B (fr) 1981-06-25
ATE4033T1 (de) 1983-07-15
GR69665B (de) 1982-07-07
ES494366A0 (es) 1981-04-01
PL125717B1 (en) 1983-06-30
DE3064044D1 (en) 1983-08-11
US4345887A (en) 1982-08-24
EP0024980B1 (de) 1983-07-06
IE50046B1 (en) 1986-02-05
AU6139080A (en) 1981-08-20
MX150741A (es) 1984-07-09
FR2463669A1 (fr) 1981-02-27
CA1164634A (en) 1984-04-03
PT71716A (fr) 1980-09-01
JPS5634413A (en) 1981-04-06
AU540274B2 (en) 1984-11-08

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