WO1989010906A1 - Platre, procede de preparation et dispositif d'application dudit platre - Google Patents

Platre, procede de preparation et dispositif d'application dudit platre Download PDF

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Publication number
WO1989010906A1
WO1989010906A1 PCT/DK1989/000105 DK8900105W WO8910906A1 WO 1989010906 A1 WO1989010906 A1 WO 1989010906A1 DK 8900105 W DK8900105 W DK 8900105W WO 8910906 A1 WO8910906 A1 WO 8910906A1
Authority
WO
WIPO (PCT)
Prior art keywords
plaster
rockwool
gypsum
granulated
filler
Prior art date
Application number
PCT/DK1989/000105
Other languages
English (en)
Inventor
Ole Jensen
Original Assignee
Ole Jensen
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 Ole Jensen filed Critical Ole Jensen
Publication of WO1989010906A1 publication Critical patent/WO1989010906A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite

Definitions

  • the present invention relates to a plaster comprising a mixture of gypsum, filler and water, a method of preparing said plaster, whereby first the gypsum and the filler are mixed and then water is added, whereupon the plaster is applied and left to harden, as well as a device for applying said plaster.
  • plasters are known containing sand stopping, gypsum or similar materials. These types of plaster are often difficult to apply and frequently require secondary treatment before paint or wall coverings, such as wallpaper or the like, can be applied.
  • the plaster according to the present invention is charac ⁇ terised in that granulated rockwool is used as filler.
  • the resulting plaster can be applied in a single operation regardless of the thickness of the applied layer, forming an even and smooth surface, which upon setting does not develop cracks or collapse.
  • all types of painting or wall coverings, such as wallpaper or the like can be applied to the surface without any kind of preceding treatment.
  • This is par ⁇ ticularly due to the combination of gypsum and granulated rockwool, where the tendency of the gypsum to shrink during hardening is compensated by the ability of the rockwool to expand, so that the mixture retains its volume.
  • the granulated rockwool is a material comprising entangled rockwool fibres forming small granules. After hardening the plaster possesses an even, smooth surface although the base may be uneven due to projections and holes.
  • a method of preparing the plaster comprising admixing gypsum and a filler, and sub ⁇ sequently adding water, whereupon the plaster is applied and left to harden, is characterised by using granulated rockwool as filler.
  • gypsum can be added to the rockwool prior to the addition of water, the weight ratio of gypsum to rockwool being approx. 4:1.
  • a binder can be added, such as polyvinyl alcohol, thus obtaining a hardened plaster of especially high strength.
  • the granulated rockwool can be a particularly bulky or voluminous granulated rockwool, such as of the type SPIN ROCK, FIU.
  • the device for applying the plaster according to the invention and comprising a housing having an Inlet opening, an outlet opening as well as an intermediate conduit for the unhardened plaster fed Into the inlet opening under pressure is characterised in. that the housing comprises a plurality of sets of inlet openings, outlet openings and intermediate conduits, said sets being adjacent each other but mutually separated, each set having an ejecting means for ejecting the plaster through the respective outlet opening, and that air nozzles are provided adjacent the outlet openings, said air nozzles adjusting the thickness of the ejected jets of plaster.
  • This device is particularly suitable to be used for apply- ing the plaster according to the invention in a simple and inexpensive manner, as it is much less time-consuming compared to known methods .
  • the device allows the applica- tion of the plaster in such a way that, if desired, the surface is immediately ready for the application of paint or wall coverings.
  • the ejecting means can be coaxially attached bucket wheels driven by a common motor via a common shaft.
  • the inlet openings can be fed via a common hopper extending in the direction of the plaster flow and being connected to a handle for manually carrying the device, the plaster being supplied to the hopper via said handle.
  • the device is par ⁇ ticularly simple and easy to handle manually.
  • each set of inlet openings, outlet openings and conduits with corresponding bucket wheels is comparatively narrow seen in the axial direction of the bucket wheels, while at right angles to said direction and transverse to the flow direction of the plaster the dimension of the inlet open ⁇ ings is approximately of the same size as the diameter of the bucket wheel, and the corresponding dimension of the outlet openings is several times larger or approximately of the same size as the diameter of the bucket wheel .
  • an air nozzle can be provided on each side of each outlet opening seen in the direction of the largest dimension of the outlet opening, and the air nozzles on each side of the outlet openings are manually adjustable around a common axis of rotation by means provided at the side of the housing.
  • Fig. 1 illustrates a portion of a device according to the invention with some parts not shown for the sake of clarity, the flow path of the plaster being indicated by dotted lines ,
  • Fig. 2 is a top view of Fig. 1,
  • Fig. 3 is a sectional view along the line I-I of Fig. 2 Illustrating the front portion of the device according to the invention.
  • Fig. 4 is a front view on a slightly larger scale of an element corresponding to the one of Fig. 3, the front portion of the device being composed of such elements and an adjacent element indicated by dotted lines.
  • the device of Figs. 1 and 2 comprises a tube-shaped handle 1 only partly shown for the sake of clarity in the Figures.
  • the front of the handle 1 is connected to the head of the device provided with the general reference numeral 2.
  • the head 2 comprises a hopper 3 adjacent the handle 1, the inside of said hopper having a funnel-shaped flow passage 4 the cross-sectional area of which increases symmetrically to both sides from the end closest to the handle 1, while said area decreases also substantially symmetrically in a direction at right angles thereto.
  • the hopper 3 is connected (not shown in detail) to a front ejecting means having the general reference numeral 5.
  • the ejecting means 5 comprises a plurality of identical elements 6-20, one end of which is closed by an end cover 21.
  • the elements 6-20 are preferably cast in form of an integral unit of a suitable plastic material. Each element has substantially the form of a plate. One side of the element is provided with a recess 22 of a substantially rectangular cross -section seen in the direction at right angles to the largest surface of said element, cf. Fig. 5 4.
  • each recess 22 defines an inlet opening 23, and at the opposite end each recess 22 defines an outlet opening 24.
  • a conduit 25 between the inlet and the outlet opening is provided to receive a rotating bucket
  • the inlet opening 23 has a cross -sectional area corresponding to the dimension of the flow passage 4 of the hopper 3, seen in the direction parallel to the largest surface of the element 12, the end surfaces of the inlet opening 23 seen in said direction flushing with adjacent
  • the conduit 25 in each element 12 widens from the inlet opening 23 in a direction parallel to the largest surface of the element and sub ⁇ stantially at right angles to the direction from the inlet opening 23 to the outlet opening 24. Adjacent the inlet
  • conduit 25 opening 23 the conduit 25 forms a curved surface 27 at one side, i.e. the lower side in Fig. 3, said surface nearly abutting the periphery of the bucket wheel 26.
  • the widening of the conduit 25 extends from a cross-section smaller than the radius of the bucket wheel 26 to a cross-
  • the conduit 25 continues into the outlet opening 24 having the same dimension as the conduit at this point. Opposite the curved surface 27 an end surface 28 of the conduit 25 extends smoothly from the inlet opening 23 to the outlet
  • the bucket wheel 26 is fastened to a shaft 29 extending through all the elements 6-20 and common to all bucket wheels 26 provided in the recesses 22 between the elements 6-20.
  • the shaft 29 extends through the end cover 21 abutting the element 20 and is connected to a motor 57 only indicated in Figs. 1 and 2.
  • the motor 57 ' is provided to drive the shaft 29 and thus all bucket wheels 26 in such a direction that the individual buckets after having passed the curved surface 27 in each conduit 25 pass across the inlet opening 23 and further to the direct vicinity of the almost tangential end surface 28.
  • the bucket wheels thus rotate in the direction indicated by the arrow 30 of Fig. 3.
  • the front of the ejecting means i.e. the side opposite the hopper 3, is provided with a row of air nozzles on each side of the row of outlet openings 24, said air nozzles running parallel to the shaft 29 of the bucket wheels 26.
  • Air nozzles 31, 32 are situated on each side of the recess 22, cf . Figs. 3 and 4, and comprise rotatable bodies, 33, 34, each having an oblong, radial through passage 35, 36.
  • the rotatable bodies 33, 34 are received in corresponding recesses 38, 39 arranged on the same side of the element 12 as the recess 22 and ending at the front of the element 12 at the same side as the outlet opening 24.
  • Each end of the rotatable bodies 33 and 34 is provided with an axial pin 39, 40, cf. Fig. 3.
  • One of the axial pins is received In a coaxially arranged bore 41, 42 in the same element 12, while the opposite pin is received in a corresponding bore in the adjacent element 13, cf. Fig. 4.
  • the rotatable bodies 33, 34 in each of the elements 6-20 are interconnected by their axial pins.
  • the axial pins are provided with engaging means (not shown) allowing a simultaneous rotation of the interconnected bodies by activating a button 43, 44, cf. Figs. 1 and 2, at the end of the ejecting means 5.
  • Each button is In engagement with the adjacent nozzle via the end cover 21.
  • an air conduit 45, 46 is provided.
  • One end of the air conduit passes into the recesses 37, 38 of the rotatable bodies 33, 34, while the other end communicates with an air passage 47, 48 passing through all the elements, cf. Fig. 3.
  • Each air passage communicates with a connecting sleeve 49, 50 for a pressurized air hose through the end cover 21, cf. Figs. 1 and 2.
  • the main portions of the device such as the handle 1, the hopper 3 and the ejecting means 5 as well as their in ⁇ dividual parts are fastened to each other by suitable means not shown in detail.
  • the joints are provided with suitable sealings so that the individual parts are sealingly connected.
  • the end of the handle 1 opposite the head 2 is connected to a source of plaster, said plaster being pressure-fed through the handle 1 to the head 2 by means of a suitable pump.
  • the plaster flows through the flow passage 4 and is dis ⁇ tributed to the inlet openings 23 as indicated by the arrows of Fig. 2.
  • From there the plaster flows to the bucket wheels 26 rotated by means of the motor 57, said bucket wheels accelerating the plaster to a velocity where it is ejected through the outlet openings 24 onto the wall to be treated.
  • the jets of plaster leaving the outlet openings 24 tend to spread to both sides in a direction at right angles to the common shaft 29 of the bucket wheels 26.
  • the spreading can be avoided by means of the adjustable air nozzles 31, 32 to be adjusted to the desired strength and, to a lesser degree, in a desired direction by the buttons 43, 44.
  • the thickness of the layer of plaster is also adjusted by the air nozzles 31, 32. The thinner the jet of plaster the thinner the layer of plaster on the wall ,
  • the device is described with reference to a preferred embodiment. Many alterations can, however, be made without thereby deviating from the scope of the invention.
  • the bucket wheel 26 can, for instance, have another shape as the one shown, since it only accelerates the pressure- fed plaster to the ejecting velocity.
  • the number of elements cooperating to define the flow passages may vary. The same applies to the dimensions of the elements.
  • the elements are advantageously manufactured of suitable plastics, which should be such that the device is easily handled and operated by a user holding the handle in his or her hands .
  • the described device is advantageously used together with a plaster comprising gypsum, filler and water, the filler being granulated rockwool mixed with gypsum prior to the addition of water.
  • the gypsum and the filler are mixed at a weight ratio of advantageously 4:1, whereupon the water is added in an amount dependent on the desired consistency, binder and colourings being optionally added.
  • the granulated rockwool may be of several types all avail- able from Rockwool International.
  • the following products have been found particularly suitable in the present connection: SPIN ROCK FIU and the Rockfil types RF 5308, 5708 and 5908.
  • the products are all in form of granules of entangled rockwool fibres or mineral wool fibres.
  • the plaster is described in a preferred composition, which can be varied in many ways without thereby deviating from the scope of the invention.
  • the important feature is that the tendency of the gypsum to shrink is combined with the ability of the granulated rockwool to expand so that these two properties compensate each other.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)

Abstract

Le dispositif à appliquer du plâtre décrit comprend un logement ayant un orifice d'entrée (23), un orifice de sortie (24) ainsi qu'un conduit intermédiaire (25) pour le mélange de plâtre non durci amené sous pression dans l'orifice d'entrée. L'orifice d'entrée (23), l'orifice de sortie (24) et le conduit intermédiaire (25) sont disposés en plusieurs groupes, chaque groupe comportant un organe de projection (26) servant à projeter le plâtre par l'orifice de sortie (24). Des injecteurs d'air (31, 32) sont fixés aux orifices de sortie (24) et servent à régler l'épaisseur des jets de plâtre projetés. Le plâtre est constitué par un mélange composé de gypse, d'un matériau de charge sous forme de laine de roche en granules et d'eau ainsi qu'éventuellement d'un liant.
PCT/DK1989/000105 1988-05-04 1989-05-03 Platre, procede de preparation et dispositif d'application dudit platre WO1989010906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK2432/88 1988-05-04
DK243288A DK163886C (da) 1988-05-04 1988-05-04 Apparat til paafoering af pudsmateriale

Publications (1)

Publication Number Publication Date
WO1989010906A1 true WO1989010906A1 (fr) 1989-11-16

Family

ID=8112334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1989/000105 WO1989010906A1 (fr) 1988-05-04 1989-05-03 Platre, procede de preparation et dispositif d'application dudit platre

Country Status (3)

Country Link
AU (1) AU3563189A (fr)
DK (1) DK163886C (fr)
WO (1) WO1989010906A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2540140A (en) * 2015-07-06 2017-01-11 Bracey Paul A trowel
WO2020020996A1 (fr) * 2018-07-25 2020-01-30 Ole Jensen Pistolet de pulvérisation pour matériau en plâtre

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1063951B (de) * 1957-03-15 1959-08-20 Lueneburger Kalkwerke Pieper & Verwendung einer Mischung aus Kalkhydrat und anorganischem Fasermaterial als Innen- und Aussenputz
GB2048235A (en) * 1979-04-25 1980-12-10 Bpb Industries Ltd Improved Joint Cement
EP0187913A1 (fr) * 1985-01-14 1986-07-23 Research Development Corporation of Japan Atomiseur pour particules ultrafines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1063951B (de) * 1957-03-15 1959-08-20 Lueneburger Kalkwerke Pieper & Verwendung einer Mischung aus Kalkhydrat und anorganischem Fasermaterial als Innen- und Aussenputz
GB2048235A (en) * 1979-04-25 1980-12-10 Bpb Industries Ltd Improved Joint Cement
EP0187913A1 (fr) * 1985-01-14 1986-07-23 Research Development Corporation of Japan Atomiseur pour particules ultrafines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACT OF JAPAN, Vol. 8, No. 255, (C-253); & JP,A,59 136 161, publ. 1984-08-04. See whole document. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2540140A (en) * 2015-07-06 2017-01-11 Bracey Paul A trowel
GB2540140B (en) * 2015-07-06 2020-12-09 Bracey Paul A trowel
WO2020020996A1 (fr) * 2018-07-25 2020-01-30 Ole Jensen Pistolet de pulvérisation pour matériau en plâtre

Also Published As

Publication number Publication date
DK163886C (da) 1992-09-07
DK243288D0 (da) 1988-05-04
DK163886B (da) 1992-04-13
DK243288A (da) 1990-01-30
AU3563189A (en) 1989-11-29

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