EP3318332A1 - Pneumatische spritzeinheit, drosselelement für eine solche einheit und spritzanlage eines beschichtungsprodukts, das eine solche einheit oder ein solches drosselelement umfasst - Google Patents

Pneumatische spritzeinheit, drosselelement für eine solche einheit und spritzanlage eines beschichtungsprodukts, das eine solche einheit oder ein solches drosselelement umfasst Download PDF

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Publication number
EP3318332A1
EP3318332A1 EP17199970.9A EP17199970A EP3318332A1 EP 3318332 A1 EP3318332 A1 EP 3318332A1 EP 17199970 A EP17199970 A EP 17199970A EP 3318332 A1 EP3318332 A1 EP 3318332A1
Authority
EP
European Patent Office
Prior art keywords
restrictor
coating product
projector
coating
pneumatic
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
EP17199970.9A
Other languages
English (en)
French (fr)
Other versions
EP3318332B1 (de
Inventor
Johan Le Cardinal
Thibault Cognon
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.)
Exel Industries SA
Original Assignee
Exel Industries SA
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 Exel Industries SA filed Critical Exel Industries SA
Publication of EP3318332A1 publication Critical patent/EP3318332A1/de
Application granted granted Critical
Publication of EP3318332B1 publication Critical patent/EP3318332B1/de
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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
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/007—At least a part of the apparatus, e.g. a container, being provided with means, e.g. wheels, for allowing its displacement relative to the ground

Definitions

  • the invention relates to a pneumatic spray assembly for a coating product for use in a coating product spraying installation, as well as a spare part restrictor for such a set and a coating product spraying installation. including such a projector and / or such a restrictor.
  • a coating product spraying installation it is known to supply one or more manual or automatic projectors with a pressure coating product, as well as with the spray air of this coating product.
  • a pump capable of delivering both the pressurized air and the pressure coating product.
  • each sprayer can be fed by a pipe of different length and / or diameter.
  • pressure regulators are mounted on the pump or the pump part which delivers the pressure coating product. The regulators are used to prevent or limit pressure fluctuations in a projector feed pipe to a coating product and to adjust the pressures in each pipe independently, in order to obtain pressure at each projector.
  • Certain coating products such as those used to apply a hue to wood, are very liquid, that is to say have a particularly low viscosity, close to that of water.
  • the supply pressure of the spray area of a projector must be low especially less than 0.5 bar.
  • a volume provided inside the body of a projector to supply this spray zone must itself be at a low pressure. This involves feeding the projector with a low pressure coating material, which causes the regulator to operate outside its nominal pressure range, to the point that it is no longer effective and no longer allows hide the stroke inversions of the pump. This results in pressure fluctuations in the projector supply pipe, which leads to uneven application of the coating product.
  • the invention intends to remedy more particularly by proposing a new assembly of pneumatic projection of coating product which makes it possible to feed a spray zone with a coating product under low pressure, without the risk of making it work. a pressure limiter outside its operating range.
  • the invention relates to a pneumatic product coating assembly comprising a pneumatic product coating projector and a supply line of this pneumatic projector from a source of pressure coating product to which the supply line is connected by its upstream end, the pneumatic projector comprising a projector body and a control valve for the flow of the coating product to a spray area of this product, this valve itself comprising a needle of selectively closing an outlet port of an internal volume of the projector body and the projection assembly defining a flow path of the coating product from the upstream end of the supply line to the outlet port of the internal volume.
  • a flow restrictor of the coating product is mounted on the flow path of the coating product to create a pressure drop upstream of the outlet port.
  • the pressure drop created by the restrictor upstream of the projector makes it possible to maintain a relatively high pressure in the upstream portion of the projector supply line in coating product, whereas the pressure in the internal volume the projector body may be sufficiently low, especially less than 0.7 bar, to allow a low pressure supply of the spray zone.
  • a pressure regulator disposed at the output of a pump for supplying the projector can be operated in its nominal operating pressure range, so that it remains effective even though the pressure of the sprayed coating product is weak.
  • the indicated pressures are relative and dynamic pressures, i.e., measured as the coating product circulates in the conduits and feed volume of the spray zone.
  • the invention relates to a restrictor forming a spare part for an assembly as mentioned above.
  • This restrictor is formed by a part which defines at least one calibrated flow conduit of coating product whose length is between 1 and 25 mm, preferably between 8 and 15 mm, more preferably of the order of 10 mm. , and whose maximum transverse dimension is less than 2 mm, preferably between 0.5 and 1.8 mm.
  • one end of the restrictor which defines a mouth, is of frustoconical outer and inner shapes, with vertex angles of the same value. This allows the restrictor to take place in a conventional device connecting the projector with the power line.
  • the invention relates to a coating product spraying installation which comprises at least one coating product tank, at least one pneumatic coating product floodlight, a feed pump for at least one floodlight. coating product from the tank, as well as a line supplying the pneumatic spotlight from the pump.
  • the pneumatic projector and the feed line form an assembly as mentioned above and / or comprise a restrictor as mentioned above.
  • the restrictor makes it possible to create a controlled loss of pressure and to obtain, within the installation, the same pressure in each projector, while using a single pressure regulator, even in the case where it There are several projectors connected to the same output of the regulator.
  • the pump is equipped, at the outlet, with a pressure regulator set to deliver the coating product to a feed line of the coating product projector, at a pressure between 0.5 and 3 bar, while the pressure restrictor is configured to deliver the coating product to the outlet port of the interior volume of the projector body at a pressure less than 1 bar, preferably between 0.3 and 0.7 bar.
  • the installation 2 represented at figure 1 is intended to coat O objects, such as wooden panels conveyed by a conveyor 4, with a liquid coating product stored in a tank 6.
  • the installation 2 comprises a projector 8 which is here formed by a pneumatic gun, type "Airspray”, intended to be manipulated by an operator.
  • a projector 8 which is here formed by a pneumatic gun, type "Airspray”, intended to be manipulated by an operator.
  • the projector 8 is an automatic airspray pneumatic type projector intended to be mounted on a support, possibly mobile, and controlled by a controller.
  • the installation 2 also comprises a pump 10 connected to the reservoir 6 by a suction tube 12.
  • the pump 10 is, moreover, connected to the projector 8 by a supply line 14 of the projector pressure coating product.
  • a pressure regulator 16 is mounted at the outlet of the pump 10, on the side of the line 14, and makes it possible to regulating the pressure of the coating product circulating in this line, as a function of a set value set by means of a button 18. It is noted 141 the upstream end of the line 14 through which this line is connected to the regulator 16 .
  • the pump 10 delivers the coating product under a pressure of between 2 and 40 bar.
  • the pressure regulator is constructed so that the set point is between 0.5 and 3 bar. In other words, the regulated pressure in the pipe 14 can normally be set between 0.3 and 3 bar.
  • the pump 10 is connected to an air source 20 which can be a source of compressed air.
  • An air suction tube 22 connects the source 20 to the pump 10.
  • a supply line 24 of the air projector 8 connects the pump 10 to the projector 8.
  • a regulator 26 is mounted at the outlet of the pump 10, starting from the line 24, and makes it possible to adjust the air pressure in this pipe 24 by means of a control button 28.
  • the lines 14 and 24 can be formed by flexible hoses.
  • the projector 8 comprises a body 82 on which is mounted a head or cap 84 immobilized by a nut 86, with the interposition of seals 88 and 90.
  • the head 84 is intended to deliver a flat jet and comprises for this purpose two horns, only one of which is visible at the figure 2 842.
  • the head is provided with airflow channels from the pipe 24. Some of these channels are visible at the figure 2 with reference 844.
  • the body 82 is, in turn, provided with channels 824 for circulating air from a connection zone of the pipe 24 on the body 82 and into the head 84. Only one of these channels is visible at the figure 2 , being specified that the number and the representation of the channels 824 and 844 are not limiting nor more than their number.
  • the sprayer 8 comprises a valve 92 which makes it possible to control the exit of the coating product by means of a trigger 94.
  • the valve comprises a needle 96 and a nozzle 98 which defines a seat 981 on which the needle 96 comes into contact. support in closed configuration of the valve 92 shown in figures 2 , 5 and 6 .
  • the nozzle 98 cooperates with a jacket 100 disposed inside the body 2 to define a volume V82 internal to the body 82, which is intended to receive the coating product flowing to an outlet orifice 982 of the nozzle 98. downstream of this outlet orifice 982, a spray zone Z8 of the headlight 8 is formed in which the coating product leaving the volume V82 through the orifice 982 is sprayed by the air from channels 844 and shaped by air from channels in horns 842.
  • a connecting member 102 is mounted on the body 82 in such a way that its internal volume V102 is in communication with the volume 82.
  • the member 102 is screwed onto the body 82.
  • This connecting member 102 is intended to to be connected to the downstream end 142 of the supply line 14. It thus constitutes a part of an inlet connection of the coating product in the body 82, more particularly in the volume V82.
  • the organ 102 is sometimes referred to as an "end fitting".
  • the connecting member 102 is equipped with an external thread 104 intended to cooperate with a nut 106 mounted free to rotate about a connecting element 108 provided with a crenelated rod introduced and immobilized by cooperation of shapes in the end. downstream 142 of the supply line 14.
  • the elements 108 and 110 are visible at the figure 6 .
  • the connecting member 102 is provided with a frustoconical mouth 112 converging towards the body 82.
  • the connecting element 108 is provided with a front surface 114 which is also frustoconical and has a geometry complementary to that of the mouthpiece 112.
  • a flow path C of pressure coating material is defined between the end 141 of the line 14 and the orifice 982.
  • This flow path C comprises the internal volume of the pipe forming the feed line 14, the internal volume V102 of the organ 102 and the internal volume V82.
  • a restrictor 120 is mounted in the volume V102, that is to say within the flow path C, in order to create a pressure drop in the path of the coating product, upstream of the volume V82.
  • the restrictor 120 is monobloc and circular section. Its outer surface 122 is complementary to the inner surface 103 of the member 102 which is also circular in section. X102 and X120 are respectively noted longitudinal and central axes of the parts 102 and 120.
  • the outer surface 122 comprises a frustoconical section 122a complementary shape of the mouth 112.
  • the apex angle a122 of the section 122a is the same as the apex angle a112 of the mouth 112. This allows a surface support section 122a on the mouth 112.
  • the restrictor 120 comprises a downstream end 124 which has the smallest outside diameter of the restrictor 120 and which is intended to be engaged to the bottom of the volume V102 towards the volume V82.
  • the end surface 124a of the end 124 is in the form of an annular disc centered on the axis X120 of the restrictor 120 and pierced with an orifice 126 which constitutes the outlet of a calibrated duct 128 with a circular section formed in the restrictor 120 and centered on the X120 axis.
  • the surface 124a participates in the limitation of the volume V82.
  • the upstream end of the restrictor 120 is noted the upstream end of the restrictor 120, opposite the downstream end 124 and which defines a mouth 132 of this restrictor.
  • This mouthpiece is frustoconical.
  • the angles a122 and a132 have the same value.
  • the upstream end 130 of the restrictor 120 is of frustoconical outer and inner shapes, with a constant thickness along its length except at an end flange 134 which exceeds the volume V102 in the mounted configuration of the restrictor 120 in the connecting member 102, as shown in figure 5 .
  • angles a112, a122 and a130 may have a value between 45 and 70 °, preferably equal to 60 °.
  • the restrictor 120 defines an internal volume V120 whose diameter is noted d120. This volume V120 forms a passage chamber for the coating product between the mouth 132 and the calibrated duct 128.
  • L128 denotes the length of the duct 128 measured parallel to the axis X120.
  • D128 is the diameter of this duct.
  • L128 and d128 are selected so as to create a significant pressure drop during the passage of the coating product volume V120 to volume V82.
  • the length L128 is chosen between 1 and 25 mm, preferably between 8 and 15 mm, more preferably of the order of 10 mm, while the diameter d128 is chosen less than 2 mm, preferably between 0, 5 and 1.8 mm.
  • the diameter d128 is strictly smaller than the diameter d120 and the inner surface 123 of the restrictor 120 comprises a frustoconical section 123b converging towards the mouth 127 of the calibrated duct 128.
  • the frustoconical section 123B has the effect that the cross section of the flow path decreases progressively between that of the pipe forming the line 14, which is substantially equal to that of the internal volume V120, and that of the calibrated conduit 128. This avoids creating recesses where the coating product could lock up.
  • the duct 128 is not circular in section.
  • its maximum transverse dimension is selected as less than 2 mm, preferably between 0.5 and 1.8 mm.
  • its maximum transverse dimension is equal to the diameter d128 of this conduit 128.
  • the half-angles at the vertex ⁇ 102 and ⁇ 122 of the surfaces 102b and 122b are equal, with a value between 15 and 30 °, preferably equal to 20 °.
  • the restrictor 120 is made by molding, machining or 3D printing a synthetic material softer than the material constituting the connector 102.
  • the connector 102 may be made of steel or brass, while the restrictor 102 is made of elastomer. This allows the restrictor 120 to adapt to the inner shape of the connecting member 102 and to seal between the parts 102 and 120.
  • the restrictor 120 may be made of metal, for example bronze.
  • the projector is in the configuration of the figure 5 where the outer surface 122 of the restrictor substantially conforms to the inner shape of the fitting 102, while the flange 134 protrudes from the volume V102.
  • the member 102 is configured to cooperate with the elements 106 and 108 both in the absence of the restrictor 120 and in the presence of the restrictor 120 in the volume V102.
  • the pressure P82 in the volume 82 can be much lower than the pressure P16 because a significant loss of pressure is created by the restriction consisting of the calibrated conduit 128.
  • the diameter d128 of the duct 128 can be chosen to be equal to 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.4 mm or 1.8 mm, which makes it possible to adapt the pressure P82 to the nature of the coating product to be projected, especially its viscosity.
  • the use of the restrictor 120 allows the pressure P82 to be less than 1 bar, for example between 0.3 and 0.7 bar, while the pressure P16 is between 0.5 and 3 bar.
  • the restrictor 120 constitutes a wear part which can be mounted reversibly and without tools inside the connection member 102 and which avoids the coating product retention zones contained in its inner shape, in particular because of the progressive decay of the passage section due to the frustoconical surface 123b.
  • No tools are required to install the restrictor 120 in the fitting 102 by pushing it in the direction of the arrow F1. It suffices for a conventional key to tighten the nut 106 on the connecting member 102.
  • it is necessary to disassemble the restrictor 120 simply loosen the nut 106 with a wrench and then pull on the flange 134 parallel to the axis X102, in a direction away from the body 82 opposite that of the arrow F1. It is therefore easy to adapt the pressure drop created by the restrictor 120, that is to say the pressure P82 within the volume V82, by installing in the volume V102 a restrictor 120 whose duct 128 has a length and a maximum transverse dimension adapted.
  • the connecting member 102 may be integral with the body 82 or fixed thereto otherwise than by screwing.
  • the restrictor 120 is mounted not in the connection member 102 but inside the volume V82, that is to say within the body 82. More specifically, the restrictor 120 divides the volume V82 into an upstream chamber C82a and a downstream chamber C82b.
  • the needle 96 passes through a central bore 121 of the restrictor 120 which occupies the bulk of the volume. More specifically, the diameter d121 of the bore 120 is slightly greater than the diameter d96 of the needle 96, for example from 5 to 10%, so that it is formed around the needle 96 and inside the restrictor 120 a conduit annular calibrated 128 which is noted e128 thickness measured radially to a longitudinal axis X96 of the needle 96.
  • L128 denotes the length of this calibrated duct 128.
  • the length L128 and the radial thickness e128 are chosen to create a pressure drop on the flow path C of the coating product.
  • This flow path C extends from the upstream end of a feed line 14 defined as in the first embodiment to the outlet orifice 982 of the nozzle 98, this flow path comprising a pipe constituting the line 14, the internal volume V102 of the member 102, the chamber C82a, the duct 128 and the chamber C82b.
  • the length L128 is chosen between 1 and 25 mm, preferably between 8 and 15 mm, more preferably of the order of 10 mm, while the radial thickness e128 is chosen to be less than 2 mm, preferably between 0.5 and 1.8 mm.
  • one or more longitudinal ducts parallel to the axis X96 can be drilled in the material of the restrictor 120, to increase the cross section between the chambers C82a and C82b. These ducts may be used in addition to or in place of the duct 128 which surrounds the needle 96.
  • the restrictor 120 can be integrated within the pipe constituting the feed line 14.
  • this restrictor is preferably integrated in the flow path of the coating product in an area near the outlet orifice 982, that is to say closer to the downstream end 142 of the line 14 or within the projector 8, as in the two embodiments shown in the figures.
  • the installation of the restrictor 120 in the connection member 102, in the body 82 or elsewhere in the flow path C of the Projector 8 thus makes it possible to maintain a relatively high pressure P16 in an upstream portion of the pipe which forms line 14, whereas the pressure P82 of the coating product at the outlet of volume V82 and the pressure of this product in spray zone Z8 are low and adapted to the viscosity of the projected coating product.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Nozzles (AREA)
EP17199970.9A 2016-11-04 2017-11-03 Pneumatische spritzeinheit, drosselelement für eine solche einheit und spritzanlage eines beschichtungsprodukts, das eine solche einheit oder ein solches drosselelement umfasst Active EP3318332B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1660689A FR3058331B1 (fr) 2016-11-04 2016-11-04 Ensemble de projection pneumatique, restricteur pour un tel ensemble et installation de projection de produit de revetement comprenant un tel ensemble ou un tel restricteur

Publications (2)

Publication Number Publication Date
EP3318332A1 true EP3318332A1 (de) 2018-05-09
EP3318332B1 EP3318332B1 (de) 2020-09-16

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EP17199970.9A Active EP3318332B1 (de) 2016-11-04 2017-11-03 Pneumatische spritzeinheit, drosselelement für eine solche einheit und spritzanlage eines beschichtungsprodukts, das eine solche einheit oder ein solches drosselelement umfasst

Country Status (9)

Country Link
US (1) US10315207B2 (de)
EP (1) EP3318332B1 (de)
JP (1) JP7114238B2 (de)
KR (1) KR102447021B1 (de)
CN (1) CN108014940B (de)
BR (1) BR102017023557A2 (de)
ES (1) ES2829327T3 (de)
FR (1) FR3058331B1 (de)
RU (1) RU2753345C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113524909A (zh) * 2020-04-19 2021-10-22 埃克塞尔工业公司 包括微气动控制单元的打印头

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US2504117A (en) * 1945-08-24 1950-04-18 Eclipse Air Brush Co Method of spraying multicolored coatings
US2513081A (en) * 1946-09-05 1950-06-27 Sherwin Williams Co Multichromatic spraying apparatus
EP0720869A2 (de) * 1995-01-03 1996-07-10 Ransburg Corporation Spritzpistole mit einstellbarem Abgabeventil
US20060219824A1 (en) * 2005-04-04 2006-10-05 Alexander Kevin L Hand-held coating dispensing device

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US3645447A (en) * 1968-12-31 1972-02-29 Electrogasdynamics Electrostatic paint spray system
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CN113524909B (zh) * 2020-04-19 2023-10-03 埃克塞尔工业公司 包括微气动控制单元的打印头

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RU2017138269A3 (de) 2021-02-19
US10315207B2 (en) 2019-06-11
CN108014940B (zh) 2021-05-28
FR3058331B1 (fr) 2023-05-19
KR102447021B1 (ko) 2022-09-23
JP7114238B2 (ja) 2022-08-08
JP2018069238A (ja) 2018-05-10
BR102017023557A2 (pt) 2018-05-29
RU2017138269A (ru) 2019-05-06
FR3058331A1 (fr) 2018-05-11
US20180126397A1 (en) 2018-05-10
ES2829327T3 (es) 2021-05-31
KR20180050242A (ko) 2018-05-14
EP3318332B1 (de) 2020-09-16
CN108014940A (zh) 2018-05-11

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