EP0482569A1 - Pistolet pulvérisateur commandé pneumatiquement - Google Patents

Pistolet pulvérisateur commandé pneumatiquement Download PDF

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Publication number
EP0482569A1
EP0482569A1 EP91117968A EP91117968A EP0482569A1 EP 0482569 A1 EP0482569 A1 EP 0482569A1 EP 91117968 A EP91117968 A EP 91117968A EP 91117968 A EP91117968 A EP 91117968A EP 0482569 A1 EP0482569 A1 EP 0482569A1
Authority
EP
European Patent Office
Prior art keywords
spray gun
channel
spray
compressed air
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.)
Granted
Application number
EP91117968A
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German (de)
English (en)
Other versions
EP0482569B1 (fr
Inventor
Perikles Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority claimed from DE9014663U external-priority patent/DE9014663U1/de
Priority claimed from DE19914130973 external-priority patent/DE4130973A1/de
Application filed by Individual filed Critical Individual
Publication of EP0482569A1 publication Critical patent/EP0482569A1/fr
Application granted granted Critical
Publication of EP0482569B1 publication Critical patent/EP0482569B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2435—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together by parallel conduits placed one inside the other
    • B05B7/2437—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together by parallel conduits placed one inside the other and a secondary stream of atomising fluid being brought together in the container or putting the carried fluid under pressure in the container

Definitions

  • the invention relates to a spray gun for spraying a flowable spray medium according to the preamble of patent claim 1.
  • a generic sprayer is e.g. known from DE 39 22 561 A1.
  • Generic spraying devices are used for large-area and homogeneous application, especially of paints and varnishes on workpiece surfaces.
  • the spraying agent and compressed air for atomizing the spraying agent are supplied from a reservoir of a nozzle device.
  • the metered supply of the spray agent is regulated by a mechanically operated valve system.
  • the valve system described in DE 39 22 561 A1 has one in the spray device axially displaceably mounted sealing rod, which is actuated by radially compressing an elastically deformable jacket of a device shaft.
  • the front end of the sealing rod lifts off the outlet opening arranged in the mouthpiece of the nozzle device and releases it for the preferably liquid spray.
  • Spray guns are also known in which the flow of spray medium is controlled by changing the cross-sectional area of a needle that can be axially displaced in a perforated diaphragm or in a conical cannula.
  • the needle is preferably controlled manually using a stepped lever.
  • the prerequisite is that the nozzle device and the needle are clean, i.e. in particular free of dried paint. Cleaning the needle is usually cumbersome with these devices.
  • the needle can also be easily damaged.
  • Another problem arises from the fact that, in the case of small spray quantities, the passage of the spraying agent must take place through a perforated diaphragm which is only slightly open to a narrow annular gap, larger paint particles having to be retained from the annular gap. It is difficult to achieve a constant, continuous color flow.
  • the needle valve control is also problematic when the position of the needle changes.
  • the needle movement for example, displaces the spray medium in the spray medium channel and increases the spray pressure for a short time, as a result of which the spray jet dose does not become smaller but larger.
  • the invention has for its object to provide a spray gun of the type mentioned, which the above. Does not have defects, is easy to use and is inexpensive to manufacture.
  • the flow of spray medium from the storage container to the nozzle device is set exclusively by controlling an air flow flowing in the air channel distributor system formed in the spray gun.
  • the spray gun according to the invention has a ventilation channel connecting the storage container to the ambient atmosphere via an outlet opening.
  • a control air duct opens into the vent duct, from which compressed air is introduced into the vent duct in the preferred direction to the outlet opening. This directed air flow creates a negative pressure in the storage container and in the section of the ventilation duct located between the storage container and the control air duct.
  • the spray gun according to the invention does not require a needle arranged in the spray medium flow, with the disadvantages mentioned above.
  • the opening of the spray medium channel projecting into the nozzle device can be used without risk of clogging can be reduced to approx. 1/10 of the conventional opening diameter, so that even very small amounts of spray can be dosed and applied homogeneously.
  • the outlet opening is preferably designed as a stowage gap which can be covered, for example, by means of a fingertip resting on it. This enables one-handed operation and control of the ink flow control.
  • the venting channel can be extended on the output side, for example, by a flexible, elastically deformable hose, with which in particular the color flow can be adjusted by means of mouth control.
  • an adjustable valve is provided in the ventilation duct, with which an exact comparison between the internal pressure of the supply container and the suction pressure is possible.
  • an adjustable outlet valve is provided parallel to the outlet opening, with which the overpressure which forms in the ventilation channel is limited to a maximum pressure.
  • the spray gun according to the invention can also be used as an ink pen.
  • the spray medium channel protrudes from the air nozzle in the manner of a color tube, so that the paint liquid can be applied directly to a drawing pad by means of its tip and without atomizing pressure.
  • the spray gun according to the invention is also a sandblasting device applicable.
  • the sand used as spraying agent is swirled in a storage container with the control air supplied to form a sand-air mixture which is discharged via the nozzle channel protruding into the storage container.
  • the spray gun has a continuously adjustable pressure reducing valve inserted between a conventional compressed air source and the compressed air inlet of the spray gun.
  • FIG. 1 The basic structure of a pneumatically controlled spray gun is shown in Figure 1.
  • This comprises a nozzle channel 16 which tapers towards its mouth towards a mouthpiece 14.
  • the spray medium channel 26 is arranged coaxially fixed in the nozzle channel 16, which ends at one end in a storage container 10 and ends at the other end in the mouthpiece 14.
  • the compressed air supplied to the nozzle channel 16 via a compressed air channel 20 connected to it flows around the spray medium channel 26 in the axial direction and emerges from the nozzle 14 with a suction effect on the spray medium channel 26 from the nozzle channel 16.
  • the emerging air flow entrains the emerging from the spray medium channel, whereby it is atomized and mixed with air, so that it e.g. can be applied to workpieces.
  • the internal pressure P1 of the container 10 can be adjusted by means of a ventilation channel 22 which connects the container 10 to the ambient atmosphere P2 near its outlet opening 28.
  • Compressed air flows into the ventilation duct 22 via a control air duct 24 connected at one end to the ventilation duct 22 and at the other end to the compressed air duct 20, as symbolically indicated with vector arrows, the air flow being directed in the direction of the outlet opening 28.
  • the amount of air flow can be continuously adjusted between a maximum negative pressure when the outlet opening 28 is fully open and a maximum excess pressure when the outlet opening 28 is closed.
  • the spray gun shown in Figure 4 consists of a Device shaft 30 with a control head 32, a container part 34 arranged at the rear end thereof and a stylus part 36 which can be locked with the container part 34 by means of a bayonet lock 37.
  • a nozzle body 38 is screwed into its front end.
  • the structure of the air duct distributor system formed in the nozzle body 38 and in the control head 32 is shown in FIGS. 2 and 5.
  • the control air channel 45 points with its inlet opening in the direction of the ventilation channel 44 on the atmosphere side final outlet opening 46.
  • the ventilation channel 44 merges into an annular channel 25 which is arranged coaxially in the control head 32 in the rear end thereof.
  • the inner circumferential surface of the ring channel 25 has an internal thread 23 into which the container part 34 with the filter receptacle 64 can be screwed.
  • the external thread 21 of the filter receptacle 64 is pierced by an axially extending longitudinal groove 35 (FIG. 3), which continues in the reservoir 40 as a tubular ventilation channel 44 ′.
  • the outlet opening 46 is shaped as a stowage gap 63 for manual regulation of the internal pressure P1 of the storage container 40.
  • the internal pressure P1 is independent of the overlap by means of a valve rod 57, which can be screwed into the ventilation channel 44 by means of its knurled head 47 of the stowage gap 63 adjustable.
  • the ring channel 25 and the container part 34 are sealed airtight to one another by means of an annular seal 62a arranged coaxially in the ring channel 25 and an annular seal 62b arranged coaxially in the control head 32.
  • the spray medium channel system has a spray medium channel 49 arranged coaxially in the control head 32 and passing through the nozzle channel 42, 42 '.
  • the spray medium channel 49 is inserted within the control head 32 into a cannula holder 27 which is screwed into the nozzle channel 42.
  • the spray medium channel 49 is supported in a centering sleeve 60, which is pressed against the inner circumferential surface of the nozzle body 38 by means of a helical spring 59 supported on the needle holder 27.
  • the centering sleeve 60 (see FIG. 7) has axially extending incision grooves 61a, 61b, through which a compressed air flow from the nozzle channel 42 to the nozzle channel 42 'is maintained.
  • the filter device 50 arranged coaxially on the container part 34 essentially consists of the filter receptacle 64 and a bore disk 19.
  • the venting channel 44 can be extended at its outlet opening 46 by means of the hose 68 shown in FIG.
  • an adapter 17 is inserted into the hose 68 at one end, which adapter can be inserted or screwed into the outlet opening 46.
  • the effective cross-sectional area of the outlet opening can be changed by pressure F1 applied radially to the hose jacket 67.
  • the spray gun shown in FIG. 9 consists of an essentially two-part device shaft 70, namely one Control head 72 and a container part 74.
  • the control head 72 has a receiving bore into which a nozzle body 76 with an integrally molded insertion part is inserted.
  • the control head 72 is formed into an integrally molded coupling part 13, the outer lateral surface of which has a circumferential ring extension 15.
  • the coupling part 13 is inserted into a receiving part 11 formed at the front end of the container part 74 in order to establish a firm connection with the container part 74.
  • the container part 74 is closed pressure-tight at its rear end by an attached container cap 29a.
  • the air duct distributor system formed in the control head 72 and in the container part 74 consists of a compressed air duct 82, into which a nipple 80 is inserted on the input side for connecting a compressed air distribution 9.
  • the compressed air channel 82 merges into the nozzle channel 81 which is formed and axially arranged in the nozzle body 76.
  • a ventilation channel 83 is formed in the upper part of the control head 72, which opens into an outlet opening 86 at the front end of the control head 72.
  • the ventilation duct 83 continues into the ventilation duct 83 ′, which projects into the container part 74.
  • a control air duct 84 is provided in the control head 72, which opens at one end into the compressed air duct 82 and at the other end with a curved outlet opening 8 into the ventilation duct 83.
  • the outlet opening 8 is aligned in the direction of the outlet opening 86, as a result of which the air flow flowing through the ventilation duct is given a preferred direction.
  • a valve rod 88 which is screwed into the control head 72 and is formed at one end to form a pointed cone seal 89, projects into the ventilation duct 83 and has a knurled head 87 at the other end.
  • the knurled head 87 By actuating the knurled head 87, the effective cross-sectional area of the ventilation duct 83 can be changed, as a result of which the air flow in the ventilation duct 83 and 83 'and thus the internal pressure P1 can be adjusted.
  • the suction pressure P3 generated at the mouthpiece 93 can be completely compensated for by actuating the valve rod 88.
  • the limitation of the internal pressure P1 to a maximum value is served by the exhaust valve 73, which is screwed into a ram air duct 85 branching off from the ventilation duct 83 in the control head 72.
  • the exhaust valve 73 By actuating the knurled head 75 connected to the outlet valve 73, the maximum back pressure which can be achieved in the ventilation duct 83 is set.
  • compressed air is fed from a conventional compressed air source via the compressed air supply line 9, the nipple 80, the compressed air duct 82 to the nozzle duct 81 and blown out of the mouthpiece 93 of the nozzle body 76.
  • the suction effect of the compressed air jet creates a negative pressure in the spray medium channel 90c, 90b arranged coaxially in the nozzle channel 81, through which spray medium 91 is sucked in from the reservoir 71 via the spray medium channel 90a and the filter device 91 arranged in the container part 74.
  • the spray medium emerging from the spray medium channel 90c is atomized into fine droplets which are mixed with the compressed air and carried away.
  • a pressure reducing valve 69 is provided between the compressed air source and the compressed air supply line.
  • the pressure reducing valve 69 is essentially from a base body 6, in which a hose 66 made of elastic material is preferably inserted axially.
  • a wedge pin 65 which is displaceable in this, is inserted perpendicular to the axial direction of the base body 6.
  • the hose 66 rests on the inclined surface 5 of the wedge pin and its cross-sectional area is changed depending on the position of the wedge pin 65, as a result of which the quantity flow and the pressure in the compressed air line 9 can be adjusted.
  • a shut-off valve is provided between the filter device 91 and the receiving part 11, which, as shown in Figure 9, consists of a manually operable flow channel 52.
  • the shut-off valve is designed as a ball seat valve 53 which has a sealing ball 54 and a helical spring 55.
  • the sealing ball 54 is pressed into its sealing position by the helical spring 55 when the control head 72 is removed from the container part 74, and is lifted off the sealing surface 4 again when these parts are engaged.
  • FIG. 13 shows a nozzle body 78 inserted into the control head 72, which is designed in such a way that the spray gun can be used like a tube drawing device.
  • a spray medium channel 90c protruding from the latter is inserted into the nozzle body 78 and is designed as a color tube.
  • the spray gun can also be used as a sandblasting device if its container part 95 of the storage container 96 is designed in the manner shown in FIG.
  • This storage container 96 can contain fine-grained solid substances, preferably sand particles.
  • the control air is conducted into the reservoir 96 via the ventilation duct 97 'and the air-permeable spray filter 98 arranged between the ventilation duct 97' and the reservoir 96.
  • the inflowing control air swirls the sand particles to form a spray sand mixture, which flows as a flowable air-sand mixture into the nozzle channel 99 'which extends over almost the entire axial length of the container part.
  • the container cap 29b which closes the container part 95, can be removed to fill or refill the storage container 96.

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EP91117968A 1990-10-23 1991-10-22 Pistolet pulvérisateur commandé pneumatiquement Expired - Lifetime EP0482569B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9014663U DE9014663U1 (de) 1990-10-23 1990-10-23 Pneumatisch gesteuerte Spritzpistole
DE9014663U 1990-10-23
DE19914130973 DE4130973A1 (de) 1991-09-18 1991-09-18 Pneumatisch gesteuerte spritzpistole
DE4130973 1991-09-18

Publications (2)

Publication Number Publication Date
EP0482569A1 true EP0482569A1 (fr) 1992-04-29
EP0482569B1 EP0482569B1 (fr) 1996-01-17

Family

ID=25907419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91117968A Expired - Lifetime EP0482569B1 (fr) 1990-10-23 1991-10-22 Pistolet pulvérisateur commandé pneumatiquement

Country Status (6)

Country Link
EP (1) EP0482569B1 (fr)
JP (1) JPH04265169A (fr)
AT (1) ATE133092T1 (fr)
AU (1) AU8605191A (fr)
CA (1) CA2053801A1 (fr)
DE (1) DE59107282D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005038162A1 (de) * 2005-08-12 2007-02-15 Kriesmair, Bernd, Dipl.-Ing. Vorrichtung zum Aufsprühen von pigmentierten Flüssigkeiten
US8052072B2 (en) 2007-04-11 2011-11-08 Bernd Kriesmair Device for spraying on pigmented liquids
CN109877260A (zh) * 2019-03-21 2019-06-14 中信戴卡股份有限公司 一种模具润滑剂旋转喷盘装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2480368A1 (fr) * 2002-03-26 2003-10-02 Spatter Shield (Aust) Pty Ltd Dispositif de commande de dispersion d'un liquide dans un fluide

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE97344C (fr) *
US1561039A (en) * 1924-11-11 1925-11-10 Walker Edward Spraying apparatus
GB647339A (en) * 1948-01-02 1950-12-13 Hoover Ltd Improvements relating to spraying devices
CH284542A (de) * 1949-12-05 1952-07-31 Herrli Hans Spritzpistole.
FR1589319A (fr) * 1968-10-14 1970-03-23

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE97344C (fr) *
US1561039A (en) * 1924-11-11 1925-11-10 Walker Edward Spraying apparatus
GB647339A (en) * 1948-01-02 1950-12-13 Hoover Ltd Improvements relating to spraying devices
CH284542A (de) * 1949-12-05 1952-07-31 Herrli Hans Spritzpistole.
FR1589319A (fr) * 1968-10-14 1970-03-23

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005038162A1 (de) * 2005-08-12 2007-02-15 Kriesmair, Bernd, Dipl.-Ing. Vorrichtung zum Aufsprühen von pigmentierten Flüssigkeiten
DE102005038162A8 (de) * 2005-08-12 2007-07-05 Kriesmair, Bernd, Dipl.-Ing. Vorrichtung zum Aufsprühen von pigmentierten Flüssigkeiten
US8500043B2 (en) 2005-08-12 2013-08-06 Bernd Kriesmair Device for spraying on pigmented liquids
US8052072B2 (en) 2007-04-11 2011-11-08 Bernd Kriesmair Device for spraying on pigmented liquids
CN109877260A (zh) * 2019-03-21 2019-06-14 中信戴卡股份有限公司 一种模具润滑剂旋转喷盘装置
CN109877260B (zh) * 2019-03-21 2023-11-03 中信戴卡股份有限公司 一种模具润滑剂旋转喷盘装置

Also Published As

Publication number Publication date
JPH04265169A (ja) 1992-09-21
CA2053801A1 (fr) 1992-04-24
AU8605191A (en) 1992-04-30
DE59107282D1 (de) 1996-02-29
EP0482569B1 (fr) 1996-01-17
ATE133092T1 (de) 1996-02-15

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