EP0239885B1 - Elektrostatische Pulver-Sprühpistole - Google Patents

Elektrostatische Pulver-Sprühpistole Download PDF

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Publication number
EP0239885B1
EP0239885B1 EP87104085A EP87104085A EP0239885B1 EP 0239885 B1 EP0239885 B1 EP 0239885B1 EP 87104085 A EP87104085 A EP 87104085A EP 87104085 A EP87104085 A EP 87104085A EP 0239885 B1 EP0239885 B1 EP 0239885B1
Authority
EP
European Patent Office
Prior art keywords
powder
cap
tube
spray gun
cup
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.)
Expired
Application number
EP87104085A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0239885A1 (de
Inventor
Arkadijus Rese
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.)
Wagner International AG
Original Assignee
Wagner International AG
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 Wagner International AG filed Critical Wagner International AG
Publication of EP0239885A1 publication Critical patent/EP0239885A1/de
Application granted granted Critical
Publication of EP0239885B1 publication Critical patent/EP0239885B1/de
Expired 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
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1413—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising a container fixed 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
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1691—Apparatus to be carried on or by a person or with a container fixed to the discharge device

Definitions

  • the invention relates to an electrostatic powder spray gun according to the preamble of claim 1.
  • powder spray guns have been known for a long time, for example from DE-OS 2 514 160, and are available on the market.
  • the advantage of these powder guns is that no separate powder preparation system and no connecting hose from such a system to the spray gun are required because the powder to be sprayed is located in the powder cup attached to the spray gun and is also spray-treated there.
  • the supply of powder to be accommodated in the powder cup is limited, so that in some cases, such as when a high powder throughput or long spraying times are required, such cup guns are not very suitable and are replaced by other guns which have a connection for connection to a remotely located powder processing plant have.
  • the object of the present invention is therefore to design an electrostatic powder spray gun with a powder cup of the type mentioned at the outset in such a way that it can be quickly and easily converted into a bechenose powder gun which can be connected to a remote powder processing system, that is to say both for operation with a powder cup attached remote powder processing plant is also suitable.
  • the solution to this problem results from the characterizing features of patent claim 1.
  • the mouth of the powder channel is exposed and can be connected to a connecting hose of a powder processing system, but at the same time the previously existing compressed air supply to the powder cup is shut off by removing the powder cup without it requires a special handle by the operator.
  • the aforementioned compressed air supply to the cup is automatically reproduced, so that cup operation can be started immediately.
  • the powder gun shown in the drawing has a base body, generally designated 10, which has approximately the shape of a "T", the horizontal part 11 being a tubular body pointing in the spraying direction, while the part 12 which slopes away from it as
  • the horizontal tubular body 11 is closed at its rear end opposite the spraying direction by a screw cap 13, while its front end is connected by means of a plug connection and a union nut 14 to a pistol tube, denoted overall by 15.
  • the annular space 17 between the inner tube 16 and the front gun tube 15a supplying the powder-air mixture to be sprayed from the gun tube mouth (not shown) .
  • a rod 19 is arranged in the rear region of the tube 16.
  • annular space 27 which opens into the open at the gun tube mouth (not shown) and continues to the rear in the form of an annular channel into the horizontal part 11 of the base body 10 up to a seal 28.
  • the annular space 27 serves to supply additional air.
  • a high-voltage generator 30 is accommodated in the handle 12, which is fed with high-frequency low voltage via a line 31 and the generated in it rectified high voltage on an electrical cable 32, the free end of which is electrically connected to the aforementioned conductor wire 29 of the gun barrel 15. There is thus an uninterrupted conductor connection between the output of the high voltage generator 30 and the needle electrode 24.
  • a rod 33 is axially displaceably mounted in an axial bore of the tube piece 11, which is connected at its front end by means of a coupling piece 34 to the rear end of the rod 19 and with its rear end is screwed into a piston 35 which is loaded by a helical spring 36 in the forward direction. Furthermore, the rod 33 is loosely surrounded by a multi-part sleeve, generally designated 37, which is supported by a spring 38 against the front end of the piston 35.
  • the sleeve 37 consists of a sleeve tube 37a with a rear collar 37b and a front clamping sleeve 37c screwed to it for prestressing inner and outer sealing elements.
  • a trigger bracket 40 articulated at 39 rests on the one hand on the front end of the sleeve 37 or its clamping sleeve 37c and on the other hand on an abutment.
  • the trigger guard 40 is pressed by the action of the spring 38 via the sleeve 37 against its abutment 41, there then being a small distance between the sleeve 37 and the piston 35; there is a further, somewhat larger distance between the rear end of the piston 35 and the screwable end cap 13. It is also important that the collar 37b of the sleeve 37 is pressed with its front surface against an annular valve seat 42 of the axial bore.
  • a conveying tube 45 which has a suction opening 45a and is attached vertically down to the vicinity of the cup base, is fastened to the screw cap. Furthermore, an air pipe 46 passing through the cover is attached to the cover 44, which projects upwards a little above the cover 44 and opens into the delivery pipe 45 within the cup 43 adjacent to the opening 45a.
  • the upper end of the air tube 46 protruding beyond the cover 44 is inserted, together with its protective sleeve 47, into a connecting nipple 48 on the underside of the tube piece 11, the nipple 48 having an elastic valve seat 49 and a valve ball 51 loaded against the valve seat by a spring 50.
  • a transverse bore 46a is provided in the cover 44, which is connected on the one hand to the air tube 46 and on the other hand to the interior of the powder cup 43.
  • the powder cup 43 is held on the powder gun by two clamping jaws 61 and 62 (FIG. 3), which are fastened to the cover 44 of the powder container 43 via springs 63 and 64.
  • the two jaws 61, 62 are loaded by the springs 63, 64 against the gun tube 15 and thus hold the powder cup 43 on the gun tube 15.
  • the clamping jaw 62 is provided with a spring clip 65, the free end of which can be hooked into a recess 66 of the clamping jaw 61, such that the spring clip 65 spans the top of the gun barrel 15. This ensures a firm and secure hold. From Fig. 3 it can also be seen that the above-mentioned channel 18 for the powder-air mixture connects to the upper opening of the delivery pipe 45 running in the powder cup.
  • a line 70 is provided with a nipple 71 for compressed air, the opening into the interior of the gun, however, is closed in the position shown, namely by the collar 37b of the sleeve 37, which acts as a valve body and rests on the valve seat 42. Moves however, as will be explained later, the collar 37b away from the valve seat 42, then an annular space is created between these two parts, into which the compressed air supplied by the line 70 can penetrate.
  • This annular space is connected to a channel which runs essentially parallel to the gun axis outside the sectional plane of the drawing and which is connected to the annular space 27 located in front of the seal 28, the annular space 27 on the one hand - as mentioned - through the entire gun tube 15 up to the latter Mouth leads, and on the other hand via a channel 73 with the interior of the connecting nipple 48 in connection.
  • the powder gun works as follows. In the position shown in the drawing, the trigger guard 40 is not removed, i.e. the powder gun is at rest.
  • the valve consisting of the collar 37b and the valve seat 42 thus blocks the compressed air supply, and the high voltage is also switched off because the magnet 80 on the trigger guard is too far away from the magnetic switch 81 of the handle 12. If the trigger guard 40 is now removed, i.e. pivoted a little bit clockwise around its articulation point 39, then it pushes the sleeve 37 to the left against the force of the spring 38, but without the collar 37b already touching the front end of the piston 35.
  • compressed air from the channel 27 passes through the bore 73 into the interior of the connection nipple 48 and further into the air pipe 46, a small part of the air flowing through the cover bore 46a into the upper part of the cup 43 and the powder therein whirls up, while the main part of the air flows out of the mouth of the air tube 46 located within the delivery tube 45 and sucks powder located in the powder cup 43 through the opening 45a by means of an injector action and carries it upward in the delivery tube 45.
  • the powder-air mixture flowing upwards in the delivery pipe 45 then passes into the channel 18 and further into the channel 17 up to the gun tube mouth.
  • the powder cup 43 is empty, it is loosened from its cover 44 by screws, the delivery pipe 45 and air pipe 46 remaining on the cover 44 and thus on the gun, while the cup 43 can be removed and refilled.
  • the Mug 43 together with its lid 44 removed from the gun. This is done by unhooking the two clamping jaws 61 and 62 of the spring clip 65 from the notch 66 and pivoting it away from the pipe 15, whereupon the clamping jaws 61, 61 are pulled apart against spring force and the whole of cup 43, cover 44 with conveyor tube 45 and air tube 46 and clamping device 61, 62, 65 existing unit is removed from the powder gun.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Nozzles (AREA)
EP87104085A 1986-04-04 1987-03-20 Elektrostatische Pulver-Sprühpistole Expired EP0239885B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3644840 1986-04-04
DE19863644840 DE3644840A1 (de) 1986-04-04 1986-04-04 Elektrostatische pulver-spruehpistole

Publications (2)

Publication Number Publication Date
EP0239885A1 EP0239885A1 (de) 1987-10-07
EP0239885B1 true EP0239885B1 (de) 1989-09-20

Family

ID=6317451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104085A Expired EP0239885B1 (de) 1986-04-04 1987-03-20 Elektrostatische Pulver-Sprühpistole

Country Status (4)

Country Link
US (1) US4775105A (da)
EP (1) EP0239885B1 (da)
DE (2) DE3644840A1 (da)
DK (1) DK164773C (da)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841069A1 (de) * 1988-02-18 1989-08-31 Rotring Werke Riepe Kg Spritzpistole zum auftragen von fluessigkeiten
DE3921213C1 (da) * 1989-06-28 1990-11-15 Wagner International Ag, Altstaetten, Ch
DK0442019T3 (da) * 1990-02-16 1995-03-13 Wagner Gmbh J Fremgangsmåde til drift af en elektrostatisk trykluftfarvesprøjtepistol
DE4020289C1 (da) * 1990-06-26 1991-12-12 Wagner International Ag, Altstaetten, Ch
DE4027078A1 (de) * 1990-08-27 1992-03-05 Wagner Int Elektrostatische spruehpistole
DE4141663C2 (de) * 1991-12-17 1996-09-19 Wagner Int Elektrostatische Pulver-Beschichtungspistole
DE4201665C2 (de) * 1992-01-22 1993-10-28 Wagner International Ag Altsta Pulver-Injektor
US6758424B2 (en) * 2000-09-29 2004-07-06 Graco Minnesota Inc. Low voltage electrostatic charging
GB2377191B (en) * 2001-07-06 2003-09-10 Reckitt Benckiser Spraying device
US20090317544A1 (en) * 2008-05-15 2009-12-24 Zao "Intermetcomposit" Method and Device for Gasodynamically Marking a Surface with a Mark
WO2011047533A1 (zh) * 2009-10-19 2011-04-28 Li Zhijun 一种集成可调供粉系統的喷粉枪

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1104217A (en) * 1910-04-11 1914-07-21 Jens A Paasche Pneumatic paint-brush.
US1682037A (en) * 1924-10-20 1928-08-28 Albert M Craig Spray gun
US2228861A (en) * 1936-08-20 1941-01-14 Edward F Wegener Adapter
US2591585A (en) * 1947-08-14 1952-04-01 Moore James Wesley Spraying device
DE842646C (de) * 1950-12-17 1952-06-30 American Type Founders Sales C Vorrichtung zum Bestaeuben insbesondere frisch bedruckter Bogen
DE1453503A1 (de) * 1964-06-23 1969-06-04 Franke Wolfgang Karl Pumpvorrichtung mit elektromagnetisch angetriebenem Kolben,insbesondere fuer Zerstaeubungs- und Spritzgeraete
DE7217048U (de) * 1972-05-05 1972-08-03 Bersch & Fratscher Gmbh Pressluftbetriebene farbspritzpistole mit materialanschluss am pistolengriffstueck
DE2514160B2 (de) * 1975-03-29 1980-05-08 Esb Elektrostatische Spritz- Und Beflockungsgesellschaft G.F. Voehringer Gmbh, 7991 Oberteuringen Elektrostatisches Sprühgerät für pulverförmiges Sprühgut
US4174071A (en) * 1976-11-08 1979-11-13 Binks Manufacturing Company Spray gun assembly

Also Published As

Publication number Publication date
DK169187D0 (da) 1987-04-02
DE3644840C2 (da) 1988-10-20
EP0239885A1 (de) 1987-10-07
DE3760572D1 (en) 1989-10-26
DK164773C (da) 1992-12-28
DK169187A (da) 1987-10-05
DE3644840A1 (de) 1987-10-15
DK164773B (da) 1992-08-17
US4775105A (en) 1988-10-04

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