EP3785805A1 - Spritzpistole zum aufspritzen einer isolierschicht auf eine decke mithilfe eines flüssigkeitsflusses, und verfahren zur herstellung einer solchen isolierschicht - Google Patents

Spritzpistole zum aufspritzen einer isolierschicht auf eine decke mithilfe eines flüssigkeitsflusses, und verfahren zur herstellung einer solchen isolierschicht Download PDF

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Publication number
EP3785805A1
EP3785805A1 EP20193404.9A EP20193404A EP3785805A1 EP 3785805 A1 EP3785805 A1 EP 3785805A1 EP 20193404 A EP20193404 A EP 20193404A EP 3785805 A1 EP3785805 A1 EP 3785805A1
Authority
EP
European Patent Office
Prior art keywords
liquid
gun
insulating layer
coating material
spraying
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.)
Withdrawn
Application number
EP20193404.9A
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English (en)
French (fr)
Inventor
Pascal Lambert
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3785805A1 publication Critical patent/EP3785805A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/149—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed
    • B05B7/1495—Spray pistols or apparatus for discharging particulate material with separate inlets for a particulate material and a liquid to be sprayed and with separate outlets for the particulate material and the liquid
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E04F21/08—Mechanical implements
    • E04F21/12—Mechanical implements acting by gas pressure, e.g. steam pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1409—Arrangements for supplying particulate material specially adapted for short fibres or chips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/144—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means
    • B05B7/145—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means specially adapted for short fibres or chips

Definitions

  • the present invention relates to the field of construction and more particularly to the thermal insulation of surfaces.
  • the invention relates more particularly to the fact of using a gun to project a mixture composed of insulating fibers such as slag wool and water, the gun projecting a cone of liquid in the central part and driving around this cone , insulating fibers.
  • Flocking involves spraying an insulating layer on the walls or ceilings of buildings using a spray gun.
  • FMA (acronym for Artificial Mineral Fibers) generally consist of a mixture, produced in the factory, of wool fibers, oils and additives based on gypsum (or other inorganic binder).
  • the gun is used to mix mineral fibers (FMA) and a spraying liquid under pressure, which is why this spraying technique is called "wet".
  • the pressurized liquid allows the mixture to be projected a certain distance. On drying, the layer thus produced solidifies while adhering to the support and thus providing an insulating layer.
  • the spray gun at the end of the pipes connected to the spray machine makes it possible to mix at least the following two constituents: “DRY” constituent and “WET” constituent, the two constituents are brought under pressure.
  • the characteristics of these flows can be defined according to two categories.
  • the “WET” flow made up of liquid generally water
  • the “DRY” flow is typically made up of fibers (slag wool fibers) and has a very low density.
  • the kinematics of these flows has, by virtue of their geometrical positioning, the following characteristics: a WET flow mixes and settles the DRY flow on the target support by saturating it with liquid.
  • the "complex”, thus projected, has a density of the order of 280 to 300 kg / m3.
  • the drying time required for the water to evaporate completely can take several weeks.
  • the density of the insulating layer thus produced is then of the order of 150 kg / m 3.
  • the spray gun is decisive as regards the characteristics of the insulating layer produced, such as: thickness, drying time, insulating capacity.
  • the spray gun has at least two outlet nozzles, one for the DRY component and the other for the WET component.
  • the DRY component emerges in the middle of the gun and the WET component rather at the periphery. It has long been believed that this arrangement is advantageous because the pressurized water is expelled by forming a cone which channels the SEC component and which carries it towards the surface to be isolated. By moving the gun sideways, the water cone first wets the surface which then receives the SEC component, which seemed to ensure good adhesion.
  • a gun for projecting an insulating layer onto a wall or ceiling of a building comprising at least one central nozzle expelling a liquid supplied by a pipe under pressure and producing a projection cone, and at least one expulsion port of a decompressed coating material conveyed by pressurized gas, characterized in that the at least one expulsion port is positioned around the central nozzle to expel the material coating on the periphery of the cone of projection of said liquid.
  • the gun may include an outlet mouth whose diameter decreases in the direction of the outlet to create a venturi effect. In this way, the mixture can be thrown over a long distance.
  • the central nozzle is surrounded by a plurality of orifices for expelling the coating material.
  • the shape of the central nozzle is designed to create a projection cone having an angle between 30 ° and 60 °. In this way, the projection of the fibers on the support to be insulated is more efficient.
  • the pressurized gas used is chosen from the following group: air, nitrogen, argon.
  • the gun comprises a valve for regulating the flow rate of the liquid inlet and for varying the mass of water projected. In this way, the operator holding the gun can easily adjust the density of the mixture thus projected.
  • the invention relates to a method of manufacturing an insulating layer on constructions comprising a projection system provided with a means of transport in a flow of gas under pressure of a decompressed fibrous material, d 'a means for pressurizing a spraying liquid and a spray gun receiving separately before spraying said decompressed fibrous material and said spraying liquid, characterized in that it comprises a step of spraying the pressurized liquid at outside the gun by forming a cone and a step of mixing the fibrous material with the pressure spraying and spraying liquid by positioning the fibrous material on the periphery of said cone.
  • the Fig. 1 presents an example of a projection system making it possible to convey the constituents to the projection gun.
  • the projection system 1 typically comprises a central 2 receiving the bags of insulating material containing for example FMA, enriched with inorganic binders, for example gypsum. These bags are emptied into an orifice in the upper part and their content is decompressed by toothed wheels 3 so as to free the fibers as much as possible between them and to give them a low density.
  • the fibers descend by gravity into a duct where they are blown by a pressurizing means 4.
  • the unit 2 has for this an air compressor 5 to create an acceleration at the inlet of the duct and a setting.
  • the fibers typically have a density of 100 to 120 kilograms / m 3.
  • the gas used is generally air but can also be any gas, nitrogen for example, in the case where certain insulating material risks premature oxidation on contact with oxygen, rare gases of argon can also be used.
  • the air compressor is advantageously integrated into the unit but can also come from any other means of supplying pressurized air, from pressurized bottles for example.
  • the system also includes a liquid compressor 8, typically water intended to provide a flow of water under pressure.
  • the water inlet preferably consists of a pipe connected to a tap, according to an alternative embodiment, the water can be sucked from a container, a container 9 on a wheel for example.
  • Water is here the most frequently used liquid, which in no way excludes other liquids compatible with the sprayed material and capable, on drying, of imparting hardness to the layer produced.
  • the water compressor supplies water under pressure through a pipe 10 to the spray gun 7.
  • the spray gun mixes the dry component supplied by the unit 2 and the liquid supplied by the compressor 8, and produces a flow of mixture intended to be projected onto a surface 11. This surface can be a wall, a ceiling or any flat surface or not, of a construction.
  • the quantity of mixture in m3 / hour can be modulated by varying the air pressure generated by the compressor 5, which modifies the quantity of fibers transported by the pipe 6 of the spray gun 7.
  • a thick coat is to be produced, the operator can apply several coats, while waiting for the previous coat to be dry enough to support the new one.
  • the Fig. 2 illustrates a spray gun and a diagram showing the spray flow according to the prior art.
  • the decompressed fibers are routed to the center of the spray gun and pressurized water flows are generated around the center.
  • the density of the WET component is approximately at 1000 kg / m3 and that of the stream component SEC approximately 150 kg / m3.
  • the mixture applied to the support has a density of the order of 280 to 300 kg / m3. Practice shows that such a mixture with a thickness of 80 millimeters dries completely after a period of 2 months.
  • the projection flow produced comprises relatively dry fibers in the center and liquid at the periphery. Such a flow compresses the mixture thus produced and tends to increase its density when dry.
  • the present invention is to modify the spray gun to produce a mixture having a lighter density when dry.
  • the modification of the spray gun also makes it possible to consume less water and thus shorten the drying time of the mixture.
  • the Fig. 3 shows in profile a diagram of a spray gun according to a preferred embodiment of the invention.
  • the projection gun 7 has an outlet opening intended to project the flow 12 of the SEC component.
  • a nozzle 14 is positioned to create the spray flow 15 of the WET component, typically water.
  • This nozzle 14 is firmly attached to the rigid casing of the spray gun so that the flow generated remains as much as possible in the axis 13.
  • This nozzle 14 is connected to the pipe 10 which transports the pressurized water from the tube. compressor 8.
  • the outlet shape of the nozzle 14 is determined so as to form a projection cone 15 having a certain angle, typically 30 ° to 60 ° depending on the choice of the nozzle.
  • the component stream 12 is driven by the stream 15 and passes all around it.
  • the fibers of insulating material are projected onto the support 11 where the water is responsible for completing their humidification. The mixture is less loaded with liquid and is therefore lighter, it dries faster.
  • the Fig. 4 shows a particular example of a spray gun 7 seen facing the component outlet. This mouth is in the form of several concentric circles.
  • the most central circle comprises a nozzle 14 for spraying the LIQUID component.
  • the gun has several nozzles 14, in this case 3. In this way, by multiplying the number of nozzles 14, a more powerful WET flow is obtained than that generated by a single nozzle having a large diameter.
  • the outlet of the SEC component is located all around the nozzles 14.
  • the gun 7 has different diameters ranging from the largest (120 millimeters) towards the rear to the smallest (60 millimeters) towards the front of the mouth. This reduction in the diameter in the direction of the supply of the SEC component produces a venturi effect which makes it possible to increase the speed of the flow 12 of the SEC component and to project the mixture further onto the support, which can be particularly useful when 'we want to project on a relatively high ceiling.
  • the gun 7 comprises a nozzle 16 for connection with the water supply pipe to the nozzles 14.
  • This nozzle 16 is advantageously associated with a tap allowing an operator to reduce the water inlet section and thus to reduce its flow rate when spraying the mixture. In this way, the operator holding the gun can easily adjust the mass of water in the mixture thus projected.
  • the Fig. 5 shows in profile a diagram of a spray gun according to a particular embodiment of the invention.
  • the flow 15 of projection of the WET component produced by the nozzle 14 is clearly visible at the top of the figure.
  • the dotted lines show the flow of the SEC component, and its path through the various constrictions 16 of the spray gun to produce a Venturi effect.
  • a valve 17 is shown to the left of the gun to adjust the flow of water supplied by the compressor.
  • the use of the spray gun according to the invention made it possible to produce a mixture applied to the support with a density of the order of 110 kg / m 3. Such a density allows for a layer of 80 millimeters to dry thoroughly in less than 60 days. Drying occurs more quickly and it is possible to apply a second coat 24 hours later, when the first does not exceed 80 to 90 millimeters.
  • the SEC component can be any type of particles capable of being projected into a liquid flow
  • the LIQUID component can be any fluid in liquid form capable of generating a flow transporting said particles, when this fluid is pressurized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Building Environments (AREA)
EP20193404.9A 2019-08-29 2020-08-28 Spritzpistole zum aufspritzen einer isolierschicht auf eine decke mithilfe eines flüssigkeitsflusses, und verfahren zur herstellung einer solchen isolierschicht Withdrawn EP3785805A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1909514A FR3100138B1 (fr) 2019-08-29 2019-08-29 Pistolet pour projeter une couche isolante sur un plafond à l’aide d’un flux de liquide et procédé de production d’une telle couche isolante

Publications (1)

Publication Number Publication Date
EP3785805A1 true EP3785805A1 (de) 2021-03-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20193404.9A Withdrawn EP3785805A1 (de) 2019-08-29 2020-08-28 Spritzpistole zum aufspritzen einer isolierschicht auf eine decke mithilfe eines flüssigkeitsflusses, und verfahren zur herstellung einer solchen isolierschicht

Country Status (2)

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EP (1) EP3785805A1 (de)
FR (1) FR3100138B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1535385A (en) * 1976-07-16 1978-12-13 Lancaster F Guns for dispensing streams of liquid cement and fibre reinforcement
US5190217A (en) * 1991-08-26 1993-03-02 Air Pressure Damp-Proofing Service, Inc. Applicator gun for applying surface coatings
EP0773834A1 (de) * 1992-11-18 1997-05-21 Usbi, Co. System zur beschichtung eines substrates mit einer verstärkten kunststoffmatrix
FR2971531A1 (fr) * 2011-02-10 2012-08-17 Servaboehm Procede de production et de projection en continu d'un mortier ou beton de faible densite et dispositif convenant a la mise en œuvre dudit procede

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1535385A (en) * 1976-07-16 1978-12-13 Lancaster F Guns for dispensing streams of liquid cement and fibre reinforcement
US5190217A (en) * 1991-08-26 1993-03-02 Air Pressure Damp-Proofing Service, Inc. Applicator gun for applying surface coatings
EP0773834A1 (de) * 1992-11-18 1997-05-21 Usbi, Co. System zur beschichtung eines substrates mit einer verstärkten kunststoffmatrix
FR2971531A1 (fr) * 2011-02-10 2012-08-17 Servaboehm Procede de production et de projection en continu d'un mortier ou beton de faible densite et dispositif convenant a la mise en œuvre dudit procede

Also Published As

Publication number Publication date
FR3100138B1 (fr) 2022-05-13
FR3100138A1 (fr) 2021-03-05

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