EP0404795B1 - Dosierpistole, insbesondere hochdruckdosierpistole - Google Patents

Dosierpistole, insbesondere hochdruckdosierpistole Download PDF

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Publication number
EP0404795B1
EP0404795B1 EP19890903135 EP89903135A EP0404795B1 EP 0404795 B1 EP0404795 B1 EP 0404795B1 EP 19890903135 EP19890903135 EP 19890903135 EP 89903135 A EP89903135 A EP 89903135A EP 0404795 B1 EP0404795 B1 EP 0404795B1
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EP
European Patent Office
Prior art keywords
valve
valve body
dosing gun
nozzle
gun according
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 - Lifetime
Application number
EP19890903135
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German (de)
English (en)
French (fr)
Other versions
EP0404795A1 (de
Inventor
Walter Westenberger
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19883808987 external-priority patent/DE3808987A1/de
Priority claimed from DE19883827442 external-priority patent/DE3827442A1/de
Application filed by Individual filed Critical Individual
Publication of EP0404795A1 publication Critical patent/EP0404795A1/de
Application granted granted Critical
Publication of EP0404795B1 publication Critical patent/EP0404795B1/de
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
    • 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
    • B05B1/306—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 the actuating means being a fluid
    • 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
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • 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
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0861—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with one single jet constituted by a liquid or a mixture containing a liquid and several gas jets
    • 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
    • B05B9/01—Spray pistols, discharge devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7835—Valve seating in direction of flow

Definitions

  • the invention relates to a dosing gun, in particular a high-pressure dosing gun for spraying a medium such as polishing paste, according to the preambles of claims 1, 10, 17 and 19.
  • DE-C-22 04 942 shows for the first time a high-pressure metering gun, in which a pressure is generated by means of a compressed air motor in a storage chamber that receives the medium to be sprayed, such as polishing paste, by means of which the movement of the valve body, such as the valve piston, is determined.
  • the medium surrounds the valve piston at least in the region of the valve seat, so that, depending on the prevailing pressure, the valve piston is spaced apart from or rests on the valve seat, in order to selectively spray or retain the medium.
  • the medium is sprayed without the addition of air, this is referred to as an "airless" process.
  • the high-pressure dispensing gun Before the medium can be sprayed, the high-pressure dispensing gun must be vented. For this purpose, separate valves are sometimes required or the air is expelled at the beginning of the spraying process, so that during reproducible delivery of the medium does not take place during this time.
  • DE-A-32 02 189 shows a high-pressure metering gun in which the valve body is arranged in a stationary manner and the nozzle, which is pressurized by means of a spring and has the valve seat, can be placed on the valve piston or can be spaced apart therefrom.
  • the spring coaxially surrounds the nozzle and is fixed by a union nut.
  • a construction in this regard has proven to be extremely disadvantageous.
  • Another deficiency of the gun in this regard is that the seal between the valve body and a relatively displaceable portion of a nozzle-receiving cylinder element takes place, which results in a relatively large sealing surface, from whose large forces result, which in turn by a spring element with a correspondingly high Force must be compensated or balanced.
  • Corresponding high-pressure metering guns also have the disadvantage that frequent replacement of the wearing parts such as the valve body or of a valve element having the valve seat, such as a perforated disk, is necessary. Then you can There may be structural disadvantages if the valve body is designed as a hollow needle through which the medium to be dispensed flows.
  • the invention is characterized in that the valve body is detachably received by a first sleeve forming a unit with it, that the first sleeve extends from the cartridge body or the housing and that the valve seat is formed in the end region of a hollow cylinder which can be displaced relative to the first sleeve which forms a unit with a second sleeve which is displaceable against the spring element and with respect to the first sleeve.
  • the medium in particular, can flow around the valve body and is supported with respect to the first sleeve via spacer elements, which in turn are an integral part of the valve body.
  • spacer elements which in turn are an integral part of the valve body.
  • the valve body with the spacer elements both with respect to the main axis and the secondary axis are symmetrical. The same applies to the hollow cylinder having the valve seat.
  • the second sleeve receiving the hollow cylinder has one or more leakage holes, which firstly prevent medium penetrating between the hollow cylinder and the first sleeve from collecting and impairing the mobility of the device, and secondly indicate that a revision of the seal and the hollow cylinder or the valve seat must be done.
  • a reversing valve body and a reversing hollow cylinder are provided, the end regions of which each have the valve seat.
  • the first working chamber which has the medium and runs between the valve seat and the valve body, is sealed on the outside of the hollow cylinder, preferably by means of a grooved ring.
  • a second working chamber is formed between radially extending sections of the first and second bushings in such a way that when the compressed air is applied, the second bushing can be displaced against the force of the spring element, with a connection between the working chamber and the outlet channels in the region of the nozzle consists.
  • the dispensing gun according to the invention can be operated both in the "airless” process and with admixture of compressed air.
  • the hollow cylinder having the valve seats has a nylon gasket which conically widens on the outside in some areas and can be placed on the inner surface of the nozzle.
  • the outer geometry of the nylon seal is appropriately designed Adjusted section of the second sleeve, on the outside of which a nut tightening the nozzle in the direction of the seal can be screwed. This provides a secure fixing of the hollow cylinder with the seal and nozzle with respect to the second sleeve, which surrounds the first sleeve in some areas and is displaceable along this.
  • the second sleeve is in turn surrounded by a further union nut, which starts from the cartridge body or the housing.
  • the spring element that pressurizes the second sleeve in the direction of the housing runs in the area between the second union nut and the outside of the second sleeve.
  • a stop is preferably provided in the front end region of the second union nut, which limits the axial displacement of the second bushing and thus of the valve seat away from the housing or the valve body.
  • valve body is displaceable against the force of a spring element with respect to the cartridge body or the housing
  • the nozzle is rotatable and axially displaceable against the force of the spring element Union nut is added.
  • a disk element having the valve seat is designed to be floating against the nozzle.
  • the teaching according to the invention provides the possibility of using a tool such as a conventional screwdriver to create a leverage effect between the union nut, which is also referred to as the nozzle nut, and the nozzle itself, by means of which the nozzle is displaced into the interior of the high-pressure metering gun.
  • a tool such as a conventional screwdriver to create a leverage effect between the union nut, which is also referred to as the nozzle nut, and the nozzle itself, by means of which the nozzle is displaced into the interior of the high-pressure metering gun.
  • This allows the air present in the lines of the device and in connected hose lines to escape.
  • the valve device closes automatically, ie the valve body rests against the valve seat, so that an adequate seal takes place.
  • the first union nut receiving the nozzle is fastened to a further union nut which can be screwed onto the cartridge body or the metering gun housing, the front opening of which, facing the first union nut, is adapted to the diameter of the contact collar of the nozzle.
  • This area is designed to protrude from the adjoining section of the second union nut, so that the valve element, like the perforated disk, can fit on the inside.
  • valve body itself is preferably slidably mounted in a valve piston guide, which has an internal, replaceable wear bushing that interacts with the valve body.
  • the seal between the first working chamber, which has the medium and runs between the valve seat and the valve body, is provided by a circumferential seal provided in the area of the wear bushing in the wall of the valve body. This also only requires a small sealing surface, so that a sensitive opening or closing of the nozzle is ensured.
  • valve device such as valve body, valve piston guide, wear bushing and a spring plate interacting with the spring element are only inserted. All parts can be easily removed and replaced with the second union nut removed. This simplifies the maintenance of the dispensing gun.
  • Airless nozzles used do not spray an omnidirectional jet in most cases, but a fan shape. In this case, the nozzle must therefore be aligned radially.
  • the nozzle is tightened on its fastening collar with the aid of a union nut, which usually itself has to be held with a separate key in order to prevent rotation. Due to the teaching according to the invention, the complex measures are no longer required, since the force of the spring element acts continuously through the spring plate, the valve piston and the valve seat up to the contact collar of the nozzle and the nozzle lies sealingly against the facing wall of the union nut.
  • the nozzle can then be rotated into any desired position, for example with an open-ended wrench, which engages on a key surface attached to the nozzle, without first having to loosen or subsequently tighten the union nut.
  • the valve body is at least partially surrounded by a hollow guide cylinder, that the valve body and the hollow guide cylinder are displaceable relative to one another, that between a valve element having the valve seat is fixed to the hollow guide cylinder and the nozzle, and that a further working chamber is arranged between the hollow guide cylinder and an element connected to it and an element holding or emanating from the valve body, with compressed air for the displaceability of the valve body relative to the valve element can be acted upon, the further working chamber being connected to the air outlet channels in the region of the nozzle.
  • the dispensing gun is suitable for aggressive, abrasive, low and high viscosity substances.
  • the other working chamber is connected to a compressed air source or not.
  • the Components of the dispensing gun are structurally simple and therefore economical to manufacture. The entire dispensing gun can be dismantled quickly and easily. That is why the parts that are subject to greater wear in the case of abrasive materials can be replaced quickly and easily.
  • the dosing gun (1) contains a housing (2), with one side of which a compressed air piston-cylinder device (3) is connected.
  • a valve device (4) is arranged on the opposite side of the housing (2).
  • a check valve (5) is attached to another side of the housing. With the check valve (5) a shut-off valve (6) is connected, which contains a connection piece (7) for a hose, which is not shown in detail and is laid to a source for the substance to be sprayed or sprayed, which is under pressure .
  • the compressed air piston-cylinder device (3) contains a hollow cylinder (8) which is closed on one side by a sealed washer (9) which is fastened to the cylinder (8) with a union nut (10).
  • a connecting piece for a hose, not shown, is attached, which is connected via a control valve, in particular a three-way valve, which is also not shown, to a compressed air source for particularly low pressure.
  • a stop spindle (12) is arranged, which has an outside of the compressed air piston-cylinder device (3) arranged adjusting nut (13) with which the axial immersion depth of the stop spindle (12) inside the Cylinder (8), which is also called hollow cylinder (8) below, can be set.
  • the shut-off valve (6) has an operating handle, not shown.
  • a threaded bore (14) is provided in the housing (2) for screwing in a further connection piece, not shown, which also does not have a connection hose shown is connected to the mentioned or a further compressed air source.
  • a hollow threaded pin (15) of the check valve (5) is screwed into a threaded bore of the housing (2), which is not specified in any more detail.
  • This threaded bore tapers at its end arranged in the housing (2) and is connected via an opening (16) to a cylindrical cavity (17) which extends through the housing and has sections of larger diameter, which are not specified, at its ends.
  • One of these sections which is located on that side of the cavity (17) which faces away from the compressed air piston-cylinder device (3), has an internal thread.
  • a cartridge-shaped insert (18) is screwed into this internal thread and has a section (19) protruding into the cavity (17), in which a cylindrical storage chamber (20) is arranged, which via a passage (21) in the section (19) is connected to a free space (22) in the cavity (17).
  • the opening (16) opens into the free space (22).
  • a plunger (23) is arranged longitudinally displaceably in the storage chamber (20), the end facing away from the storage chamber (20) is held in a piston (24), which is displaceably mounted in the interior of the hollow cylinder (8).
  • a seal (25) is arranged in the cylindrical, unspecified wall of the piston (23).
  • the piston (24), the inner wall of the hollow cylinder (8) and the disc (9) enclose a working chamber (26) which is accessible for gases via the connecting piece (11).
  • the hollow cylinder (8) is closed at its end facing away from the disk (9) with a circular flange (28) inserted into the cylindrical cavity and fastened to the wall thereof with a locking ring (27), which has an unspecified passage opening for the plunger (23).
  • the flange (28) contains unspecified bores which run parallel to the longitudinal axis of the hollow cylinder (8) and into which screws (29) are inserted which are screwed into threaded bores in the housing (2).
  • the flange (28) and the housing (2) are each provided with aligned leakage holes, not shown.
  • ventilation bores for the cylinder which are not specified, are provided.
  • the cylindrical storage chamber (20) tapers at one end to an unspecified, axially identical threaded bore into which a hollow needle (30), also to be referred to as a valve body, is screwed with an end section (31) provided with an external thread.
  • the hollow needle (30) which has a central channel (32) running in the longitudinal direction, belongs to the valve device (4). At the mouth of the channel (32) into the storage chamber (20), a closure seal (33) is inserted into a recess.
  • the hollow needle (30) contains a central section (34) provided with a molded-on nut head, to which the end section (35) having the second cylindrical shape adjoins, the outside of which is at least partially designed as a guide surface (36).
  • the insert (18) projects with a section (37) beyond the housing (2).
  • a hollow cylinder (38) which is a guide surface for a section (39) of a sliding body (40).
  • a seal (41) is arranged in the wall of the cylinder (38).
  • the sliding body (40) has a step which is set back radially inwards against the section (39), as a result of which there is a free space between the wall of the cylinder (38) and the sliding body (40). In this free space, a spiral spring (42) is inserted, one end of which is supported on the annular wall of the step at section (39).
  • the other end of the spiral spring (42) is supported on a union nut (43) which is screwed onto an external thread of the section (37) and has a central passage for the part of the sliding body (40) which projects beyond the section (37).
  • the sliding body (40) is provided in its interior with a cavity (44) in which the middle section (34) is located.
  • the wall of the section (39) facing the housing (2) forms, with the walls of the cylinder (38), a further working chamber (45) which, via a channel (46) in the insert (18) with the threaded bore (14) connected is.
  • a seal (47) is provided which seals the channel (46) and the working space (45) against the space (22) in which the substance to be sprayed or sprayed is located.
  • the cavity (44) tapers into a cylindrical guide surface (48), that is to say a so-called hollow guide cylinder, which surrounds the guide surface (36) on the valve body (30).
  • a seal (49) is arranged in the guide surface of the hollow guide cylinder (48).
  • the channel (32) is angled radially outwards in the vicinity of the end of the hollow needle (30) protruding from the housing (2) and has an opening into a cavity (51) which is formed by a cylindrical recess in the sliding body (40) becomes.
  • the diameter of this cavity (51) is larger than the diameter of the hollow guide cylinder (48).
  • the cavity (51) extends up to the end face (52) of the sliding body (40).
  • the edge of this passage opening (54) is designed as a valve seat surface for a valve head (55) which is located at that end of the valve body (30) or the hollow needle which protrudes from the housing (2).
  • the valve head (55) can be an integral part of the hollow needle (30). It is also possible to attach a separate valve head (55) to the end of the hollow needle (30).
  • the valve head (55) is preferably spherical or hemispherical.
  • the sliding body (40) is provided at its end facing away from the housing (2) with an external thread, not specified, onto which a union nut (56) is screwed, which insert (57) with a nozzle (58) against the valve plate (53 ) and presses it against the end face (52).
  • the insert (57) contains air outlet channels (59) which run to an annular cavity (60) which is located between the inner end face of the insert (57), the union nut (56), the valve plate (53) and the end face (52) is arranged.
  • the ring cavity (60) is connected to the cavity (44) via a channel (61).
  • the check valve (5) there is a nut-shaped screw connection (63) at the deflection point of the channel for the material transport leading to the shut-off valve (6).
  • a pressure sensor In an extension (64) of the screw connection (63) there is a pressure sensor, not shown, which has an optical display element (65) for the pressure. Electrical detection and e.g. digital display of the pressure.
  • Another pressure sensor (62) is connected to the storage chamber (20) with a sensor element inside.
  • the pressure values can be evaluated electronically and used to monitor the function of the entire system.
  • the hydraulic unit which comprises the cartridge and the valve device, can be separated from the compressed air motor via a grooved ring (123), which results in a high degree of serviceability.
  • the stroke of the tappet (23) comes to a standstill at the seal (33) and is set to a desired value via the stop spindle (12) as in the dosing procedure described under points 2 and 4.
  • FIG. 3 shows, in a purely schematic representation and partly in section, part of a further embodiment of a metering gun, in particular a high-pressure metering gun (200), which has a cartridge body (209) which can be detachably inserted into a gun body (212).
  • a compressed air motor (not shown), for example of the type described above, is arranged in the gun body (212) in order to generate a pressure to the desired extent by moving a plunger which can be displaced in a medium to be sprayed.
  • the medium to be sprayed such as polishing paste, extends in the drawing in the dashed area to a valve head (213) of a valve body such as valve piston (205).
  • valve piston (205) is arranged to be axially displaceable in a valve piston guide (207) which comprises a wear bushing (206) along which the valve piston (205) can be moved.
  • the seal between the valve piston (205) and the wear bushing (206) takes place via a seal (215) embedded in a groove (214).
  • the wear sleeve (206) With its rear annular end wall (216), the wear sleeve (206) forms a stop for a spring plate (208), which interacts with its rear end wall (217) of the valve piston (205).
  • the spring plate (208) which is open in the direction of the gun body (212), receives a compression spring (211) which is supported against a cover (210) which, when the dispensing gun (200) is mounted, is essentially immovable by being in contact with, for example stop not shown is set.
  • the cover (210) has a U-shape in section, the circumferential edge (218) extending in the direction of the spring plate (208) being sealed off from the valve piston guide (207) having a hollow cylindrical shape.
  • the force caused by the spring (211) clearly causes the spring plate (208) and thus the valve piston (205) to be displaced in the direction of a nozzle (202) which is received by a first union nut or nozzle nut (201).
  • the nozzle nut (201) is in turn screwed to a second union nut (204) which in some areas surrounds the cartridge body (209) on the outside.
  • the sealing between the union nut (204) and the cartridge body (208) takes place via a statically sealing O-ring seal (219).
  • the nozzle (202) has a contact collar (220) which bears on the inner surface of the first union nut (201). Between the valve head (213) of the valve piston (205) and the contact collar (202), a valve element having a valve seat (222), such as a perforated disc (203), is also floatingly mounted.
  • valve piston (205) can be lifted off the valve seat (203) against the force caused by the spring (211) so that the medium can be sprayed through the nozzle (202).
  • the end area of the second union nut (204) has a radially inwardly extending section (223), the inside diameter of which is larger than that of the contact collar (220), but smaller than that of the perforated disk (203).
  • the nozzle (202) held by the first union nut or nozzle nut (201) can be pressed against the nozzle (202) by means of a screwdriver which can be inserted into a recess (221) provided in the nozzle nut (201), whereby the nozzle ( 202) is shifted inwards.
  • the perforated disc (203), including the valve piston (205), which is floating against the nozzle (202) and has a valve seat (222), is displaced against the force of the closing spring (211).
  • valve device closes automatically, since the force of the spring (211) causes the spring plate (208) via the valve piston (205) and the valve seat (202) or Perforated disc (203) causes a force on the contact collar (220) for sealing contact with the union nut (201).
  • the union nut (204) is loosened by the cartridge body (209) until the spring plate (208) lies against the stop (216) of the wear bushing (206). If the union nut (204) is unscrewed further, the spring force can no longer act on the valve piston (205), so that the closing force of the valve piston (205) or the valve head (213) on the valve seat (222) is canceled and thus any air that may be present can escape through the perforated disc (203) and the nozzle.
  • the interior of the dispensing gun (200) is still sealed, so it can be under pressure.
  • the perforated disk (203) continues to bear against the inner surface of the radially inwardly projecting section (223) of the second union nut (204).
  • the valve head (213) lies close to the valve seat (222) and closes the interior.
  • FIGS. 1 and 2 show further particularly noteworthy configurations of the invention.
  • the same reference numerals have been chosen for elements that can already be seen in FIGS. 1 and 2.
  • a hollow cylinder section (70) extends from the housing (2) and extends in the direction of the valve device (4).
  • the hollow cylinder section (70) can also be an end section of a cartridge (100) protruding from the housing (2), which can be detachably arranged in the housing (2), but remains stationary with the housing (2) during operation of the spray device. Housing (2) and cartridge (100) can also be designed as a unit.
  • a piston (101) is now designed to be displaceable within the hollow cylinder section (70).
  • the piston (101) of the exemplary embodiment according to FIG. 4 represents a section of the valve body (102) which is opposite the hollow guide cylinder (48) is designed to be displaceable.
  • the valve body (102) is essentially designed as an elongated hollow cylinder which in turn surrounds a hollow needle (103) which can be screwed firmly to the cartridge (100) or the housing (2) and which is open to the storage chamber (20).
  • the hollow needle (103) also referred to as the hollow pin, is provided in the storage chamber with the seal (33), against which the displacement piston (23) can be placed at maximum stroke.
  • the substance to be sprayed can now be pressed through the hollow pin (103) in order to flow via a radially extending opening (104) into the cavity (51) between the hollow guide cylinder (48) and the outside of the valve body (102).
  • the valve head (55) then lifts off the valve seat (53).
  • the opening (104) consequently represents the connection between the chamber (105) and the cavity (101), the former being delimited by the inner wall of the valve body (102) and the end face of the hollow pin (103).
  • the hollow guide cylinder (48) is in turn received by a hollow cylinder (73) which can be screwed onto the hollow housing section (70) and on which in turn the cup-shaped end section (83) of the valve device (4) and a further union nut (112) which acts as a compressed air regulator can be screwed.
  • the air outlet channels (59) for spraying the over Medium (58) emerging medium run between the pot-shaped end section (83) and a centering cap (110) which in turn receives the nozzle (8).
  • a truncated cone-like seal (111) preferably made of a polymer.
  • connection between the channels (108) and (109) can now be changed such that more or less compressed air is emitted via the air outlet channels (59).
  • valve body (102) which according to the invention forms a rigid unit with the piston (101) which can be displaced against the spring (76), which produces a force directed away from the housing (2), can be carried out exclusively and / or with compressed air .
  • FIG. 8 shows a preferred embodiment of the guide cylinder (48), which can also be referred to as a wear bushing, with the material nozzle (58) received by it.
  • the material nozzle (58) can thus be inserted into the guide cylinder (48) from the housing side, centering being provided by projecting lugs (120) and (122).
  • the material nozzle itself has a hard metal insert (124) which forms the actual nozzle and projects on the housing side over the holding body (125) receiving the nozzle with a flat surface (126). This surface (126) also serves as a valve seat for the valve head (127) on the end face of the valve body (102) or (30).
  • valve head which then acts as a valve head (55), can be embedded in the end face of the valve body (30), (102) in order to compensate for any canting.
  • Appropriate construction enables a simple construction and thus easy maintenance of the valve head, the valve plates (53) described in connection with FIG. 2 being unnecessary. It is also not necessary for the valve head to be spherical, as shown in FIGS. 2 and 4. Rather, the valve seat (126) facing surface to be flat, as indicated in FIG. 6.
  • the check valve (5) is shown in an exploded view, which can be designed as a replaceable unit according to a further feature of the invention.
  • the check valve (5) consists of a screw-in cage (174) in which a pressure spring (176) with a ceramic or hard metal sealing ball (178), valve seat (180) and sealing washer (182) is interchangeably arranged. If the check valve (5) wears out, the previously mentioned unit consisting of the elements (174) to (182) only has to be unscrewed from the housing in order to be replaced by a new one. This results in a high level of maintenance friendliness.
  • a cartridge (504) is arranged in a stationary manner in a gun housing (502).
  • a first cylindrical bush or bush (506) is screwed into the cartridge (504) and has a projection (508) which projects radially outwards.
  • the front end (510) of the sleeve (506), that is to say of the hollow cylindrical body, has an inwardly directed radial section in order to receive a groove ring seal (512) between the first sleeve (506) and a hollow cylinder element (514).
  • a so-called reversing valve body (518) is releasably clamped between the groove ring seal (512) and a radially inwardly extending section (516) of the cartridge body (504), which consists of a cylinder section (520) with valve ball sections (522) or (524) exists.
  • the body (520) can be hollow. Spacer elements protrude from the outer surface of the body (520) in the direction of the inner surface of the first sleeve (504), in this way in this To ensure the position of the reversing valve body (518). These spacing elements are provided with the reference symbols (526) and (528) in FIG. 9.
  • the reversing valve body (518) has approximately a bone shape, the end regions (530) and (532) resting on the one hand on the groove ring seal (512) and on the other hand on the section (516) of the cartridge body (504).
  • the cylindrical section (520) can clearly be completely flowed around by medium to be dispensed by the high-pressure dosing gun (500) or (600), such as polishing paste. This is conveyed from the housing (502) via the storage chamber (534) into the first working chamber (536) present between the reversing valve body (518) and the inner surface of the first bushing (506) by means of a compressed air motor (not shown, but already mentioned above).
  • the reversing valve body (518) is symmetrical both with respect to its main axis (538) and about its secondary axis (540) running perpendicularly to it. This has the advantage that when a valve head (522) or (524) is worn, the reversing valve body (518) only has to be turned over in order to align the valve head (524) or (522) that has not yet been used with the hollow cylinder (514) , which forms the valve seat (542) at the end.
  • the hollow cylinder (514) is also symmetrical both with respect to its longitudinal axis (538) and its secondary axis, so that turning is possible.
  • the hollow cylinder (514) or the valve seat can consist of hard metal, ceramic, boron carbite or the like.
  • the first working chamber (536) is sealed on the one hand between the valve seat (542) and the adjacent valve head (522). On the other hand, the sealing takes place by means of the grooved ring (512) which is supported on the outer surface of the hollow cylinder (514).
  • the hollow cylinder (514) is now designed to be displaceable with respect to the first sleeve (504) so as to be dependent on the pressure prevailing in the first working chamber (536) Valve head to be spaced or to rest on this.
  • a second bushing or bushing (544) is provided, which partially surrounds the first bushing (506) and is designed to be displaceable along this.
  • the second bushing (544) that is to say the hollow cylindrical body, has a conically widening end region (546), in the interior of which a gasket (548), preferably made of nylon, can be inserted, which, for example, is press-fitted to the hollow cylinder (514).
  • a nozzle (550) on the seal (548) through which the medium is sprayed On the outside there is a nozzle (550) on the seal (548) through which the medium is sprayed.
  • the nozzle (550) is gripped by a first union nut (552), which can be screwed onto the section (546) of the second sleeve (514) in such a way that the seal (548) in the conical extension of the internally conical section (546) the second sleeve (544) is clamped.
  • the hollow cylinder (514) making the valve seats (542) or (554) available is determined at the same time.
  • the second bushing (544) has one or more leakage holes (572). These prevent that between the first and second bushing (506) and (544) in the area (574) of the hollow cylinder (514) by moving the second bushing (544) to the first negative or positive pressure that builds up can affect mutual mobility. Furthermore, medium emerging from the seal (544), which enters the space (574) along the outer surface, can escape through the leakage holes (572), so that medium cannot accumulate and thus cannot impair mobility. At the same time, if a medium escapes, it can be seen that the seal (512) and the hollow cylinder (514) must be revised.
  • the second bushing (544) can now be moved against the force of a spring (556) which is fixed between the second bushing (544) and a second union nut (558) which starts from the cartridge body (504).
  • the force of the spring (556) is directed so that the second sleeve (544) is pressed towards the housing (502). In this way, a contact of the valve seat (542) on the valve head (522) of the stationary in the Cartridge body (504) and thus in the housing (502) arranged reversing valve body (518).
  • the end area of the second union nut (556) has a radially inwardly projecting section (560) which serves as a stop for the second sleeve (544).
  • the second bushing (544) is displaced and the valve seat (542) is lifted off the valve head (522) when the pressure prevailing in the first working chamber (536) overcomes the force caused by the spring element (556).
  • the medium can flow through a channel (562) extending into the nozzle (550) so as to be sprayed.
  • the embodiment according to FIG. 6 differs from that of FIG. 5 in that the second bushing (544) and thus the valve seat (542) are lifted off from the valve body (518) with compressed air support, while simultaneously in the area of the nozzle ( 550) extending outlet channels (562) there is a mixing of the medium to be sprayed with compressed air.
  • a second working chamber (564) is provided, which is connected to a compressed air source, not shown.
  • the second working chamber (564) is laterally on the one hand from the radially outwardly extending section (508) of the first bushing (506) and on the other hand a radially outwardly extending section (566) of the second one running parallel thereto Limited sleeve (546), whose opposite wall serves as an abutment for the spring element (556).
  • the second working chamber (564) is further delimited by a section of the inner wall of the union nut (558) and the outer surface of the first bushing (506) or a ring element (not specified).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Coating Apparatus (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Closures For Containers (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
EP19890903135 1988-03-17 1989-03-17 Dosierpistole, insbesondere hochdruckdosierpistole Expired - Lifetime EP0404795B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE3808987 1988-03-17
DE19883808987 DE3808987A1 (de) 1988-03-17 1988-03-17 Vorrichtung zum spruehen bzw. spritzen fluessiger oder pastenfoermiger stoffe
DE19883827442 DE3827442A1 (de) 1988-08-12 1988-08-12 Hochdruckdosierpistole
DE3827442 1988-08-12
PCT/EP1989/000286 WO1989008505A1 (en) 1988-03-17 1989-03-17 Dosing gun, in particular high-pressure dosing gun

Publications (2)

Publication Number Publication Date
EP0404795A1 EP0404795A1 (de) 1991-01-02
EP0404795B1 true EP0404795B1 (de) 1994-11-23

Family

ID=25866065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890903135 Expired - Lifetime EP0404795B1 (de) 1988-03-17 1989-03-17 Dosierpistole, insbesondere hochdruckdosierpistole

Country Status (9)

Country Link
US (1) US5203508A (ja)
EP (1) EP0404795B1 (ja)
JP (1) JP2691786B2 (ja)
AT (1) ATE114254T1 (ja)
AU (1) AU3213489A (ja)
DE (1) DE58908664D1 (ja)
FI (1) FI97335C (ja)
RU (1) RU2067895C1 (ja)
WO (1) WO1989008505A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009044464A1 (de) 2009-11-09 2011-05-12 Walter Westenberger Spritzpistole
DE202011000432U1 (de) 2011-02-24 2012-05-29 Walter Westenberger Spritzkopf
DE202012103821U1 (de) * 2012-10-05 2014-01-09 Walter Westenberger Spritzpistole

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005044468A1 (en) * 2003-10-29 2005-05-19 Akzo Nobel N.V. Processes and apparatuses for dosing a medicament or other viscous substance
US7703702B2 (en) * 2004-04-07 2010-04-27 Illinois Tool Works Inc. Pneumatically operated device having check valve vent and method for making same
US7237726B2 (en) * 2005-03-29 2007-07-03 Pu Star Machinery Industrial Co., Ltd. Paint sprayer gun
RU2608490C9 (ru) * 2012-03-06 2017-06-14 3М Инновейтив Пропертиз Компани Распылитель со встроенным нагнетательным каналом
RU174978U1 (ru) * 2017-08-22 2017-11-14 Общество с ограниченной ответственностью "Гамма" Съемный держатель для пистолета для нанесения адгезионных композиций
CN108326655B (zh) * 2018-03-21 2019-10-01 靖江市长源液压机械有限公司 一种阀板的打磨装置
DE102018121626A1 (de) 2018-09-05 2020-03-05 Rud. Starcke Gmbh & Co. Kg Poliervorrichtung
RU2748313C1 (ru) * 2020-05-08 2021-05-21 Общество с ограниченной ответственностью "ИРБИС ТЕХНОЛОГИИ" (ООО "ИРБИСТЕХ") Способ подачи сыпучего твердого криогенного вещества в поток сжатого воздуха и устройство для его осуществления
CN112497021B (zh) * 2020-11-28 2021-12-14 宣城市健龙橡塑密封件有限公司 一种机械密封件加工的抛光装置

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DE1243062B (de) * 1962-12-26 1967-06-22 Vilbiss Co Spritzpistole mit angetriebener Kolbenpumpe
US3332623A (en) * 1964-12-14 1967-07-25 Donald A Gallant Atomizer
US3561680A (en) * 1968-09-16 1971-02-09 Respond Inc Spray head assembly
DE2204942C2 (de) * 1972-02-03 1974-03-21 Walter 6051 Laemmerspiel Westenberger Hochdruck-Dosierpistole, insbesondere zum Aufbringen einer Polierpaste
FR2184151A5 (ja) * 1972-05-08 1973-12-21 Est Aciers Fins De
DE2346467A1 (de) * 1973-09-14 1975-03-27 Chem Fab Ravensberg Gmbh Hochdruckspritzpistole
DE3202189C2 (de) * 1982-01-25 1983-11-24 Gebrüder Hau Maschinenfabrik GmbH & Co, 6050 Offenbach Hochdruckdosiervorrichtung, insbesondere zum Ausspritzen einer Polierpaste
DE3529909A1 (de) * 1985-08-21 1987-03-05 Wagner Finish Tech Center Gmbh Vorrichtung zum abgeben eines fluessigen oder pastoesen mediums
US4650119A (en) * 1985-11-26 1987-03-17 Binks Manufacturing Company Air spray gun
DE3821212A1 (de) * 1988-06-23 1989-12-28 Wagner Gmbh J Einrichtung zur steuerung der abgabemenge einer duese

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009044464A1 (de) 2009-11-09 2011-05-12 Walter Westenberger Spritzpistole
DE202011000432U1 (de) 2011-02-24 2012-05-29 Walter Westenberger Spritzkopf
DE202012103821U1 (de) * 2012-10-05 2014-01-09 Walter Westenberger Spritzpistole
EP2716368A2 (de) 2012-10-05 2014-04-09 Walter Westenberger Spritzpistole

Also Published As

Publication number Publication date
US5203508A (en) 1993-04-20
EP0404795A1 (de) 1991-01-02
JP2691786B2 (ja) 1997-12-17
DE58908664D1 (de) 1995-01-05
JPH03503026A (ja) 1991-07-11
FI97335B (fi) 1996-08-30
FI97335C (fi) 1996-12-10
RU2067895C1 (ru) 1996-10-20
WO1989008505A1 (en) 1989-09-21
AU3213489A (en) 1989-10-05
ATE114254T1 (de) 1994-12-15
FI904556A0 (fi) 1990-09-17

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