EP0347551A2 - Dispositif de commande de débit d'une buse - Google Patents

Dispositif de commande de débit d'une buse Download PDF

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Publication number
EP0347551A2
EP0347551A2 EP89107238A EP89107238A EP0347551A2 EP 0347551 A2 EP0347551 A2 EP 0347551A2 EP 89107238 A EP89107238 A EP 89107238A EP 89107238 A EP89107238 A EP 89107238A EP 0347551 A2 EP0347551 A2 EP 0347551A2
Authority
EP
European Patent Office
Prior art keywords
pump
control piston
control
piston
adjusting member
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.)
Ceased
Application number
EP89107238A
Other languages
German (de)
English (en)
Other versions
EP0347551A3 (fr
Inventor
Ewald Kille
Heinrich Griebel
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.)
J Wagner GmbH
Original Assignee
J Wagner GmbH
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 J Wagner GmbH filed Critical J Wagner GmbH
Publication of EP0347551A2 publication Critical patent/EP0347551A2/fr
Publication of EP0347551A3 publication Critical patent/EP0347551A3/fr
Ceased 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
    • B05B7/02—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
    • B05B1/3006—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 controlling element being actuated by the pressure of the fluid to be sprayed

Definitions

  • the invention relates to a device for controlling the amount of a liquid or pasty, pressurized medium, such as paint, lacquer, adhesive or the like, flowing out of a dispensing nozzle of a unit, for example a spray gun, and consists of a feed pump with an oscillating one Drivable pump pistons, the pump chamber of which accommodates the pump piston and is incorporated into a pump housing, is connected via a suction line to a storage container for the medium to be dispensed and has an outlet valve which can be actuated by the prevailing pressure, as well as a delivery chamber connected upstream of the dispensing nozzle and which can be connected to the pump chamber via the outlet valve .
  • a device of this type for the quantitative delivery of a medium is known.
  • a second valve is used in the delivery chamber, the closing body of which can be actuated against the force of a spring by the pressure prevailing in the delivery chamber, in order to ensure that medium is only dispensed when there is sufficient spray pressure in the delivery chamber.
  • the second valve is therefore designed so that its opening pressure is significantly higher than that of the pump outlet valve.
  • an adjustable drosel valve is connected to the delivery chamber, by means of which the ink throughput can be adjusted, as well as by the preload of the valve spring of the second valve and the stroke of the pump piston.
  • the medium not flowing out of the nozzle is thus returned to the reservoir via the throttle valve.
  • the object of the invention is therefore to provide a device of the aforementioned type, by means of which the amount of the medium flowing out of a nozzle can be controlled in a simple manner and can be continuously adjusted within a large range between a maximum and a minimum value without the delivery rate the pump and / or the degree of atomization.
  • no excess medium conveyed by the pump should be returned to the storage container and thus damaged, the medium should Rather remain in the pumping and / or delivery chamber, the setting of the amount of medium to be discharged should also be carried out easily by hand in a short time, and the device should be attachable to similar units without any special precautions being taken.
  • a control sleeve is arranged axially adjustable in the delivery chamber and a cooperating control piston is used, which is axially displaceable with the valve body of the exhaust valve and against the force of a return spring, and that the control sleeve and / or the control piston are provided with one or more throttle openings, the passage cross-sectional area of which can be adjusted to adjust the respective quantity of medium flowing through the discharge nozzle and can be changed automatically by relative displacements of the control piston relative to the control sleeve depending on the position of the valve body of the exhaust valve.
  • control piston axially displaceably in the control sleeve and to connect it via a rod to the valve body of the exhaust valve.
  • control sleeve To adjust the axial position of the control sleeve, it is appropriate to use it in a sleeve-like adjusting member or to firmly connect it to the adjusting member, which is aligned with the pump housing and axially adjustable relative to the latter.
  • the adjusting member can be connected to the pump housing directly or via an intermediate member by means of a thread, the adjusting member being able to be firmly connected to the pump housing as an intermediate member by means of a union nut which partially overlaps this.
  • the throttle openings incorporated into the control sleeve and / or the control piston can be designed in a simple embodiment as axially extending wedge-shaped recesses, cut-outs, openings or the like with cross-sectional areas changing in the axial direction;
  • the throttle openings are inexpensive to manufacture if they are designed as wedge-shaped recesses which are machined into the outer circumferential surface of the control piston and can be covered by the control sleeve during an axial adjustment of the control piston.
  • the spring plate can be axially displaceably guided in an interior of the adjusting member by means of a guide member which is arranged between the latter and the control piston, preferably of cross-shaped design and which is firmly connected to the spring plate via a stepped plunger.
  • the dispensing nozzle which is preferably provided with a swirl head, can be screwed onto the adjusting member and the return spring can be supported directly or via an intermediate member on the dispensing nozzle.
  • the adjusting member should also be provided with a handle, for example in the form of a knurled collar.
  • a unit provided with a dispensing nozzle is equipped with a device designed according to the invention, it is possible in a very simple manner to control the quantity of the medium conveyed by the pump that is ejected from the dispensing nozzle and to change this quantity continuously over a wide range without z. B. a spray pattern and / or the medium may be impaired by repeated pumping. If a throttle with an adjustable and cross-sectional area that can be changed during operation is connected upstream of the dispensing nozzle, the respective delivery rate can be adjusted without difficulty, without partial return of the conveyed medium to the storage container and without corresponding structural measures having to be taken accordingly.
  • the medium pressed into the delivery chamber by the pump piston and not ejected through the dispensing nozzle remains in the throttle chamber and / or is returned through the throttle piston to the pump chamber, so components to be integrated into the pump are not required.
  • the device designed according to the proposal can be attached to the pump housing without any problems, and units that are already in operation can thus be equipped with such a device in order to be able to adapt the quantity of the medium to be ejected to the respective circumstances.
  • the device shown in FIG. 1 and designated 1 serves to control the amount of a medium conveyed by means of the pump 2 flowing out of a discharge nozzle 14 assigned to a feed pump 2, without the degree of atomization being impaired.
  • the feed pump 2 here consists of a pump housing 3 with an inserted cylinder 4 and a pump piston 5 which is displaceably arranged in the cylinder 4 and which can be driven in an oscillating manner by means of an electric oscillating armature motor, not shown.
  • the pump chamber 6 of the feed pump 2 can be connected to a storage container (not shown) via a suction slot 7 and a suction line 8.
  • a pumping chamber 10 is connected downstream of the pumping chamber 6 and can be connected to the pumping chamber 6 via an outlet valve 11 as a function of the pressure prevailing therein.
  • the outlet valve 11 is formed by a valve surface 12 machined on the cylinder 4 and an axially adjustable valve body 13 guided in the delivery chamber 10, which cooperates with the valve surface 12.
  • a control sleeve 31 and a control piston 32 which is displaceably guided in the delivery chamber 10 are furthermore inserted in the delivery chamber 10 and are connected via a rod 34 to the valve body 13 of the exhaust valve 11.
  • the control sleeve 31, on the other hand, is firmly connected to a sleeve-like adjusting member 21 which is fastened to the pump housing 3 with the aid of a union nut 26.
  • the adjusting member 21 is provided on the side facing the pump housing 3 with an external thread 24 and the union nut 26 is provided with an associated internal thread 27 into which the adjusting member 21 is screwed. And by means of a thread 9, the union nut 26 is fastened to the pump housing 3.
  • the adjusting member 21 is equipped with an external thread 23, into which the dispensing nozzle 14 provided with a swirl head 15 is screwed. And between the two threads 23 and 24 is a handle 25, z. B. attached in the form of a knurled collar, so that the adjusting member 21 easily rotated by hand in the thread 27 of the union nut 26 and thereby the control sleeve 31 can be adjusted axially.
  • a groove 28 is machined into the internal thread 27 of the union nut 26, into which a spring ring 29 is inserted.
  • the adjusting member 21 can thus be adjusted to the left until it rests on the spring ring 29.
  • wedge-shaped throttle openings 33 extending in the axial direction thereof are incorporated in the control piston 32 and are covered by the control sleeve 31 when the valve body 13 of the exhaust valve 11 is adjusted.
  • the openings 33 are designed in the form of milled recesses machined into the outer circumferential surface of the control piston 32, specifically to the diameter of a tappet 36 supported on the control piston 32.
  • a cross-shaped guide member 37 is arranged between the control piston 32 and the spring plate 35, which thus can be flowed through by the medium to be conveyed, but by means of which the spring plate 35 is axially displaceably guided in an interior 22 of the adjusting member 21.
  • valve body 13 of the exhaust valve 11 is thus connected to the control piston 32 via the rod 34 and this is connected to the valve plate 35 via the adjacent plunger 36.
  • a return spring 38 which is supported on the swirl head 15 of the dispensing nozzle 14 attached to the adjusting member 21, acts on the spring plate 35, the firmly connected and abutting components can be attributed to the illustrated right end position during a suction stroke of the pump piston .
  • a seal 40 which is inserted in the area between the control sleeve 31 between the union nut 26 and the pump housing 3 and is axially braced, creates a reliable seal at the connection point of the adjusting member 21 with the pump housing 3.
  • the feed pump 2 If the feed pump 2 is put into operation, medium is first sucked into the pump chamber 6 by the pump piston 5 via the suction line 8 and the suction slot 7 and subsequently compressed therein. As soon as a pressure prevails in the pump chamber 6 and a force is exerted on the valve body 13 of the outlet valve 11 which is higher than the counterforce of the return spring 38, the outlet valve 11 is opened and the medium flows into the delivery chamber 10. In this operating state, the medium can also reach the interior 22 of the adjusting member 21 through the throttle openings 33 of the control piston 32.
  • valve body 13 and the control piston 32 which is permanently connected to the control piston 32 via the rod 34, continue to be shifted to the left, an operating state results after a short time in which the throttle openings 33 are closed by the control sleeve 31 arranged in a fixed position.
  • the pressure in the pump chamber 6 and the delivery chamber 10 rises sharply since medium can no longer flow away, so that a high pressure is exerted on the medium located in the interior 22 of the adjusting member 21 via the control piston 33 and this by the swirl head 15 the dispensing nozzle 14 is supplied.
  • the spring plate 35 is equipped with a throttle constant throttle resistance in the form of an annular gap 39, the negative pressure is maintained in the front area of the interior 22 due to the delayed medium equalization over a longer period of time, dripping on the dispensing nozzle 14 is reliably prevented in this way .
  • the flow cross-section of the annular gap 39 is dimensioned only minimally larger than is necessary for the passage of the maximum delivery rate of the pump, which is limited by the throttle openings 33. And since the pump piston 6 and the components connected to it perform up to 7200 strokes in one minute, the movement games are carried out in a very short time.
  • FIG. 2 shows a diagram of the pressure curve in the pump chamber 6 during a unit of time.
  • the curve b indicates the pressure curve over the time axis during a stroke of the pump piston 5.
  • the curve b can be seen that the pressure in the pump chamber 6 initially increases flat with the throttle openings 33 still open during the time S 1.
  • the throttle openings 33 are closed, the pressure build-up takes place with closed throttle openings 33 during the time S2 very quickly.
  • the pressure is reduced again during the time S3 until the throttle openings 33 open at X2.
  • the pressure is returned to the initial height.
  • the control and thus the setting of the quantity of the medium conveyed by the pump 2, which is ejected from the dispensing nozzle 14, is accomplished by changing the position of the control sleeve 31 with the aid of the adjusting member 21.
  • the control sleeve 31 is namely axially displaced, so that the maximum flow cross-sectional area of the throttle openings 33 is changed.
  • the respective discharge quantity is determined by the maximum flow cross-sectional area of the throttle openings 33.
  • the device 1 By means of the device 1, it is thus possible to change the amount of the medium to be atomized flowing out of the dispensing nozzle 14 in a simple manner without the quantity of the non-atomized medium conveyed by the pump 2 having to be returned to the storage container.

Landscapes

  • Details Of Reciprocating Pumps (AREA)
  • Nozzles (AREA)
  • Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP89107238A 1988-06-23 1989-04-21 Dispositif de commande de débit d'une buse Ceased EP0347551A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3821212 1988-06-23
DE3821212A DE3821212A1 (de) 1988-06-23 1988-06-23 Einrichtung zur steuerung der abgabemenge einer duese

Publications (2)

Publication Number Publication Date
EP0347551A2 true EP0347551A2 (fr) 1989-12-27
EP0347551A3 EP0347551A3 (fr) 1990-07-25

Family

ID=6357090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107238A Ceased EP0347551A3 (fr) 1988-06-23 1989-04-21 Dispositif de commande de débit d'une buse

Country Status (5)

Country Link
US (1) US4982899A (fr)
EP (1) EP0347551A3 (fr)
JP (1) JPH0240253A (fr)
KR (1) KR900000125A (fr)
DE (1) DE3821212A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111974989A (zh) * 2020-08-25 2020-11-24 刘占国 一种铝合金板材多喷头3d打印装置
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2067895C1 (ru) * 1988-03-17 1996-10-20 Вестенбергер Вальтер Дозировочный пистолет (его варианты)
DE4108428A1 (de) * 1991-03-15 1992-09-17 Wiegner Georg Dipl Kaufm Vorrichtung zur dosierten abgabe von unter druck stehenden inhaltstoffen
US6130266A (en) * 1999-02-04 2000-10-10 Kaneka Corporation Pre-expanded particles of propylene resin, process for preparing the same and flow-restricting device
KR100319016B1 (ko) 1999-07-12 2002-01-16 손철수 혼합 액체를 이용한 공기 정화 장치 및 방법
CA2543541A1 (fr) * 2003-10-29 2005-05-19 Akzo Nobel N.V. Procede et appareil de dosage d'un medicament ou autre substance visqueuse
US8651397B2 (en) * 2009-03-09 2014-02-18 Techtronic Power Tools Technology Limited Paint sprayer
CN107393849B (zh) * 2017-08-14 2023-07-04 通威太阳能（安徽）有限公司 一种喷涂式刻蚀槽用限喷装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621965A1 (de) * 1986-07-01 1986-12-18 Hugo Brennenstuhl GmbH & Co KG, 7400 Tübingen Spritzpistole fuer fluessigkeiten, insbesondere lacke

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118611A (en) * 1963-02-04 1964-01-21 Martin J Berlyn Fuel injection nozzle
DE1646190A1 (de) * 1965-01-05 1971-08-19 Wagner Fa Ing Josef Luftlose Spritzpistole fuer Fluessigkeiten
US4516702A (en) * 1982-12-06 1985-05-14 Copar Corporation Dripless valve
US4558821A (en) * 1983-03-03 1985-12-17 Canyon Corporation Trigger-type sprayer with integrally formed housing, trigger, nozzle and cylinder
DE3529909A1 (de) * 1985-08-21 1987-03-05 Wagner Finish Tech Center Gmbh Vorrichtung zum abgeben eines fluessigen oder pastoesen mediums

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621965A1 (de) * 1986-07-01 1986-12-18 Hugo Brennenstuhl GmbH & Co KG, 7400 Tübingen Spritzpistole fuer fluessigkeiten, insbesondere lacke

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics
CN111974989A (zh) * 2020-08-25 2020-11-24 刘占国 一种铝合金板材多喷头3d打印装置
CN111974989B (zh) * 2020-08-25 2022-10-18 江西普辉铝业有限公司 一种铝合金板材喷头口径可调节3d打印装置

Also Published As

Publication number Publication date
US4982899A (en) 1991-01-08
EP0347551A3 (fr) 1990-07-25
JPH0240253A (ja) 1990-02-09
DE3821212A1 (de) 1989-12-28
KR900000125A (ko) 1990-01-30

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