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EP0345544A2 - Applicateur de matière pâteuse en particulier matière d'étanchéité - Google Patents

Applicateur de matière pâteuse en particulier matière d'étanchéité Download PDF

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Publication number
EP0345544A2
EP0345544A2 EP89109373A EP89109373A EP0345544A2 EP 0345544 A2 EP0345544 A2 EP 0345544A2 EP 89109373 A EP89109373 A EP 89109373A EP 89109373 A EP89109373 A EP 89109373A EP 0345544 A2 EP0345544 A2 EP 0345544A2
Authority
EP
European Patent Office
Prior art keywords
pressure
liquid
valve
cylinder
gas
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
EP89109373A
Other languages
German (de)
English (en)
Other versions
EP0345544A3 (fr
Inventor
Wilhelm Segatz
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.)
Ara Werk Kraemer GmbH and Co
Original Assignee
Ara Werk Kraemer GmbH and Co
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 Ara Werk Kraemer GmbH and Co filed Critical Ara Werk Kraemer GmbH and Co
Publication of EP0345544A2 publication Critical patent/EP0345544A2/fr
Publication of EP0345544A3 publication Critical patent/EP0345544A3/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
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/015—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with pneumatically or hydraulically actuated piston or the like

Definitions

  • the invention relates to a device for dispensing pasty masses, in particular sealing compounds, with a cylinder which serves to hold the masses and has an opening for the masses to exit, a pressure stamp which is axially displaceable in the receiving cylinder by means of a flowable pressure medium (fluid), one a valve device for supplying the pressure medium and a valve device for relieving the pressure in the pressure cylinder.
  • a flowable pressure medium fluid
  • a gas spring is used to discharge the masses, by means of which a pressure stamp can be displaced in the axial direction.
  • the pasty masses are metered by the gas spring itself and, if appropriate, additionally by a manually operable valve arranged on the end face of the receiving cylinder.
  • German utility model G 87 05 030.7 deals with the discharge of pasty masses which are located in tubular bags, the axially displaceable pressure piece of the device used for this purpose having a pressure relief spring.
  • the object of the invention is to prevent further masses from escaping when the discharge process is ended or interrupted. This should be done in connection with a simple handling of the device.
  • the object of the invention is achieved in a particularly advantageous manner in that the pressure cylinder is filled with a liquid serving as a pressure medium and the device for supplying the pressure medium and the device for pressure relief are arranged in the liquid line. Due to the minimal expansion or compression of the liquid when the liquid pressure is lifted up, this embodiment results in an immediate pressure relief; likewise, when minimal volumes of the pressure medium are supplied, pressure is applied immediately.
  • the device according to the invention is particularly suitable when the pressure medium is oil. Due to the immediate pressure reduction, a subsequent leakage of the masses is ver prevents. Due to the immediate build-up of pressure, work can continue directly with a uniform discharge speed of the mass, for example, after the dispensing device has been removed or relocated.
  • the device according to the invention is advantageously designed such that either the line for supplying the liquid or the line for pressure relief is closed while the other line is then open.
  • the device has a pressure pump, in particular a liquid pressure pump, for generating the liquid pressure.
  • This pressure pump is preferably spatially separated from the discharge device, the pressure pump and discharge device being connected to one another via at least one flexible liquid pressure line.
  • the discharge device and the pressure pump can also form a transportable unit according to the invention.
  • the pressure pump is then preferably designed as a standing device.
  • the pressure pump is expediently a mechanically actuatable pressure pump, in particular it can be a foot pump.
  • the pressure pump is designed in particular for a pressure range from 120 to 400 bar and a preferred pressure range from 120 to 220 bar.
  • the device can be designed such that the liquid is pressed against a gas cushion in a gas pressure accumulator.
  • the liquid and the gas cushion in this gas pressure accumulator are preferably separated from one another by a membrane.
  • An adjustable gas admission pressure can be applied against the membrane via a valve located on the gas pressure accumulator, so that the liquid pressure builds up against this gas admission pressure when the pressure pump is actuated.
  • it is pre partial if the gas volume in the gas pressure accumulator is large in relation to the displacement volume of the piston in the pressure cylinder.
  • a ratio of gas volume in the gas pressure accumulator to piston displacement volume in the pressure cylinder of at least 10 to 1, preferably 20 to 50 to 1, is preferred according to the invention.
  • the pressure pump itself can be dimensioned such that after the mass has been completely dispensed, 5 to 6 strokes of the pressure pump are sufficient to restore the initial pressure of the liquid, which was originally set against the gas admission pressure.
  • the device for pressure relief is connected according to a preferred embodiment of the invention via a line for returning the liquid essentially without pressure to a reservoir for the liquid, which in turn is preferably in turn connected to the liquid pump, so that a closed liquid circuit is present.
  • the liquid reservoir can preferably form a structural unit with the pressure pump.
  • the supply valve for opening and closing the liquid supply line and the pressure relief valve which opens and closes the return line for the liquid are designed as one structural unit.
  • the supply valve and the pressure relief valve can be mechanically coupled. This mechanical coupling can be implemented within a structural unit or between spatially separate valves.
  • the device can preferably also be designed such that the pressure relief device is part of the mechanical actuation device for supplying the liquid.
  • the same actuating element in particular a trigger valve, can be provided according to the invention.
  • the feed valve is expediently a ball valve which has at least one valve seat.
  • the ball can be mechanically disengaged from this valve seat against the pressure of the liquid, in particular it can be lifted off.
  • a valve seat is provided for the pressure load and the pressure relief, which can be opened or closed by the same ball.
  • These two valve seats can be arranged coaxially to one another and are preferably on the same side of the ball.
  • the valve seats are preferably designed to be axially displaceable relative to one another, whereby an alternative lifting of the ball from the valve seats is possible.
  • the pressure relief device can have a pipe section which is designed to lift the ball out of the valve seat, which closes the feed line of the liquid, so that pressure medium can flow in.
  • the pipe section is preferably at least partially arranged in the line leading from the supply valve to the pressure cylinder.
  • the opening of the pipe section serving as a pressure relief line assigned to the ball simultaneously forms the valve seat for the pressure relief valve.
  • Such an embodiment has a position in the pressure build-up in the pressure cylinder, in which the ball in the supply valve is lifted out of its valve seat and is located on the opening of the pipe section acting as a valve seat of the pressure relief valve and closes it.
  • the position with pressure relief in the pressure cylinder is characterized in that the ball is arranged in the feed valve in its valve seat and the opening of the pipe section, which acts as a valve seat of the pressure relief valve, is exposed.
  • the receiving cylinder can have an extension serving as a pressure cylinder with the same inside diameter as is e.g. is described in German utility model 87 05 030.7, both of which are separated by the pressure stamp which also serves as a pressure piston.
  • the pressure cylinder and pressure piston can also be provided in addition to the receiving cylinder and pressure stamp, with the pressure piston and pressure stamp being operatively connected to one another.
  • a particularly advantageous embodiment of the invention exists if the pressure cylinder of a gas spring is provided as the pressure cylinder, the part of the gas spring which is normally filled with gas being filled with the liquid.
  • the pressure rod of the gas spring serves as a pressure piston and acts mechanically on the pressure stamp of the discharge device.
  • a gas spring is to be understood as one which is normally permanently filled with a gas and which works essentially at constant pressure against the cross section of a pressure rod.
  • the pressure that acts on the masses to be discharged depends on the diameter of the pressure rod of the gas spring. With a thick push rod, a greater force acts on the masses to be discharged, while, on the other hand, a smaller force occurs with a thin push rod.
  • the invention can also be viewed in such a way that the gas pressure is shifted back into a gas cushion, in particular into the gas pressure accumulator, and the liquid acts as a non-compressible transmission medium.
  • the design of the device, in which the features according to the invention are implemented in combination with the liquid-filled pressure cylinder of a gas spring, is particularly suitable for achieving the object according to the invention.
  • the volume of liquid that can also be introduced into the pressure cylinder under pressure loading corresponds to the displacement volume of the pressure piston.
  • the Device for the application of the liquid and for the pressure relief at least one opening in the part of the pressure cylinder which is filled with the liquid.
  • a supply line, which is provided both for the application of the liquid and for pressure relief, can connect to this opening with a clamp connection.
  • the device can advantageously be designed such that the pressure cylinder is at least partially surrounded by an annular space in the form of a cylinder jacket, which is delimited by two O-rings around the opening. This cylindrical space has an opening, which communicates with the opening in the pressure cylinder, for the supply line coming from the valves.
  • the device according to the invention can also be designed such that a reducing valve for regulating the liquid flow is located in the liquid feed line. As seen in the direction of flow, this is preferably arranged upstream of the inlet valve in the pressure line.
  • the device can preferably be in the form of a dispensing gun that has a handle and a trigger.
  • the device is suitable for all pasty masses, right down to viscous masses, but also for foams.
  • the masses can be introduced and processed in the receiving cylinder of the device either in loose form or also packaged, for example in cartridges or tubular bags.
  • the discharge process takes place in such a way that no further residues of the masses emerge when interrupted or terminated, since the invention immediately relieves pressure despite only a small amount of reflux of liquid takes place. Furthermore, the discharge takes place at an adjustable speed and very evenly.
  • the device works in an energy-saving manner due to the small amounts of liquid that occur and the preferred use of a mechanically actuated pressure pump. Since no compressed air is used, the masses are discharged completely silently. Additional, manually operated material valves, such as can be provided to prevent undesired mass discharge, for example when using a gas spring alone, are not required in the invention.
  • the device according to FIG. 1 comprises a dispensing gun 1 with handle 17 and trigger 20, which is additionally provided with a reducing valve 2 in the area of handle 17.
  • the dispensing gun 1 has a pressure rod 14 in a pressure cylinder 13, and a pressure stamp 12 in a receiving cylinder 11, at the end of which is opposite the handle 17 there is a discharge nozzle 16 either on the device itself or on an insertable cartridge.
  • the pressure rod 14 is connected directly to the pressure stamp 12 at its end facing the discharge nozzle 16.
  • parts of the dispensing gun 1 are shown in more detail in longitudinal section.
  • Fig. 1 further shows a reservoir 10 for oil, which has a foot pump 9 for generating oil pressure.
  • a gas pressure accumulator 5 is provided, which is communicatively connected to the pump.
  • the oil pressure produced with the foot pump 9 can be generated against a gas cushion 6 which is located in the gas pressure accumulator 5.
  • the gas pressure accumulator 5 there is a membrane 7 for separating gas and oil.
  • a valve 8 is arranged on the gas pressure accumulator 5. With this valve, the gas admission pressure against which the oil pressure is built up can be generated and varied.
  • a supply pressure line 3 connects the storage container 10 and the gas pressure accumulator 5 to the handle 17 of the dispensing gun 1, while a parallel line as return line 4 connects the handle 17 of the dispensing gun 1 to the storage container 10.
  • the supply line 3 leads to the supply of the pressurized oil from the storage container 10 or the gas pressure accumulator 5 into the handle 17 of the dispensing gun 1 and the return line 4 serves to return the pressure-relieved oil from the handle 17 of the dispensing gun 1 into the storage container 10.
  • the arrangement is designed as a closed oil circuit, the line length between the pump device and gun being 3 m to 5 m.
  • FIG. 2 shows a vertical partial longitudinal section of the dispensing gun 1.
  • the dispensing gun 1 has a handle 17 with a trigger 20.
  • the handle 17 contains a valve unit which contains a supply valve 18 and a pressure relief valve 19 in a mechanically coupled manner and which can be actuated manually via the trigger tap 20.
  • This valve unit is shown in more detail in FIGS. 3a) and 3b).
  • screw connections are located on the handle 17 on the underside. The connection between the feed line 3 and the handle 17 or the return line 4 and the handle 17 is established via this.
  • This receiving cylinder 11 there is the pressure stamp 12 which is connected to the pressure rod 14 of the pressure cylinder 13 filled with oil 34.
  • This cylinder 13 represents the cylinder of such a gas spring, which is normally permanently filled with a gas and which works at a substantially constant pressure against the cross section of a pressure rod. Since such gas springs are mass-produced, they can be used inexpensively and in a space-saving manner for the invention. While these gas springs are normally filled with a constant amount of gas and completely sealed, the housing of such a "gas spring” according to the invention is filled with oil and provided with a feed line. The space filled with the pressure medium, here oil, is shown with a broken line in FIG. 2.
  • the pressure cylinder 13 consists of the housing of the gas spring filled with oil and the pressure rod 14 of the gas spring represents the pressure piston.
  • this arrangement receives high, constant forces to discharge the masses, since the pressure in the system can be kept very high and the gas volume in the gas pressure accumulator can be kept large. No more braking devices have to be provided for the push rod itself, since when the pressure is released, there is no pressure immediately acting on the push rod.
  • the resilience of the masses to be discharged can thus have an effect on the rod, so that no remaining masses emerge through the discharge nozzle and the residual masses are also relieved of pressure.
  • the discharge device remains handy since the dispensing gun is spatially separated from the oil pressure generating device.
  • the pressure cylinder 13, as also shown in FIG. 2, is connected to the receiving cylinder 11 via a screw connection 15.
  • a pressure line 21 connects the valve unit arranged in the handle 17, which contains the supply valve 18 and the pressure relief valve 19, to a cylindrical annular space 22 in the upper part 23 of the handle 17, which surrounds a part of the pressure cylinder 13.
  • This annular space 22 is formed by a clamp connection around the pressure cylinder 13 and sealed with two O-rings 24.
  • the clamp connection is created via the screw connection 15 and via a further screw connection 25 provided on the opposite side of the upper part 23 and also serves to fasten the pressure cylinder 13.
  • the annular space 22 connects the line 21 and a radial opening 26 in the pressure cylinder 13.
  • This opening 26 is therefore located in the part of the pressure cylinder wall 27 which is surrounded by the cylindrical annular space 22 filled with oil. Through this opening 26 in the pressure cylinder wall 27, the oil located in the pressure cylinder 13 can either be pressurized with oil pressure or pressure relieved via the valve unit shown in FIGS. 3a and 3b.
  • the valve unit which contains the supply valve 18 and the pressure relief valve 19, is shown in FIG. 3.
  • the valve unit is a ball valve in which a valve ball 28 serves as a valve element for both valves.
  • Each valve 18 or 19 has a spherical shell-shaped valve seat 30 or 32, these valve seats being designed to be movable relative to one another. As a result, either one or the other valve seat can alternatively be sealed with the ball.
  • the valve seat 30 is fixed in the valve housing and forms the valve seat for the feed line 21 to the pressure cylinder 13.
  • the second valve seat 32 is designed to be movable and forms the end face of a pipe section 31, the interior of which communicates with the return line 4.
  • Fig. 3a shows the state when the oil in the pressure cylinder 13 is depressurized, and Fig. 3b that in which the oil in the pressure cylinder 13 is acted upon by oil.
  • Fig. 3a in which the valve unit is in the pressure-relieved state, the ball 28 in the supply valve 18 is pressed by the spring 29 and the oil pressure prevailing in the supply line into the valve seat 30, so that the pressure cylinder 13 is shut off from the supply line 3.
  • the pipe section 31 is arranged in the line between the supply valve 18 and the pressure relief valve 19 so that the end opening associated with the ball 28, which serves as valve seat 32 of the pressure relief valve 19, is exposed.
  • a connection from the pressure cylinder 13 to the return line 4 is established through the interior of the tube piece 31 and via a cylindrical annular space 36 surrounding it.
  • This arrangement enables the pressure relief in the pressure cylinder 13 to be carried out by means of an oil return flow.
  • Suitable O-rings 33 for sealing are located between the line wall and the pipe section.
  • FIG. 3b shows a state in which the valve unit comprising the supply valve 18 and the pressure relief valve 19 is present when the oil in the pressure cylinder 13 is pressurized.
  • the pipe section 31 is moved by manual actuation of the pulling valve 20 in the direction of the ball 28, that it is pressed into the opening of the pipe section 31 serving as valve seat 32 of the pressure relief valve 19 and the ball 28 simultaneously against the pressure of the spring 29 and the oil pressure prevailing in the supply line is raised from the valve seat 30 of the supply valve 18.
  • a connection between the pressure cylinder 13 and the feed line 3 is thus provided around the ball 28 via the annular space 35 surrounding the pipe section 31 and the line 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Safety Valves (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP89109373A 1988-06-10 1989-05-24 Applicateur de matière pâteuse en particulier matière d'étanchéité Ceased EP0345544A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8807574U DE8807574U1 (de) 1988-06-10 1988-06-10 Vorrichtung zum Austragen von pastösen Massen, insbesondere Dichtungsmassen
DE8807574U 1988-06-10

Publications (2)

Publication Number Publication Date
EP0345544A2 true EP0345544A2 (fr) 1989-12-13
EP0345544A3 EP0345544A3 (fr) 1990-08-29

Family

ID=6824908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109373A Ceased EP0345544A3 (fr) 1988-06-10 1989-05-24 Applicateur de matière pâteuse en particulier matière d'étanchéité

Country Status (3)

Country Link
US (1) US5025959A (fr)
EP (1) EP0345544A3 (fr)
DE (1) DE8807574U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5797520A (en) * 1996-09-24 1998-08-25 Northrop Grumman Corporation Metering system and method for use with fluids having a high solid content

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US923550A (en) * 1906-03-23 1909-06-01 Graaff & Compagnie Ges Mit Beschr Haftung W Device for the uniform sprinkling of liquids.
US1878115A (en) * 1928-04-12 1932-09-20 Cosse Arthur B De Hydraulic lubricating system
US2593362A (en) * 1946-07-08 1952-04-15 John L Taylor Support for containers of pastelike substances having fluid pressure means for dispensing said substances
US3199511A (en) * 1961-04-26 1965-08-10 Kulick George Apparatus for precise administration of parenteral fluids
US3651994A (en) * 1969-10-13 1972-03-28 George F Nordenholt Caulking gun
GB1371662A (en) * 1971-11-01 1974-10-23 Spotnails Pneumatically powered dispensing tool
US3712516A (en) * 1971-11-12 1973-01-23 M Stamets Mechanism for ejecting plastic materials
US3983947A (en) * 1974-09-24 1976-10-05 William Richard Wills Valve and handle for an air operated tool, and method of fluid control
US4334636A (en) * 1979-12-27 1982-06-15 Paul William A Apparatus for handling gasket-forming material
GB2078867B (en) * 1980-06-25 1983-09-21 Distillers Co Carbon Dioxide Metering system for dispensing beer or other potable carbonated liquids
US4441629A (en) * 1982-08-10 1984-04-10 Mackal Glenn H Compressed gas powered caulking gun
DE3409724A1 (de) * 1984-03-16 1985-09-26 Ara-Werk Krämer GmbH + Co, 7441 Unterensingen Handgeraet zum austragen von pastoesen massen
US4826050A (en) * 1984-11-28 1989-05-02 Murphy Allan P Spraying and dosing apparatus
DE3514428A1 (de) * 1985-04-20 1986-10-23 Hilti Ag, Schaan Geraet zum auspressen von kartuschen
DE3607176C2 (de) * 1986-03-05 1994-04-28 Hilti Ag Dosiergerät für plastische Massen
DE8705030U1 (de) * 1986-07-30 1987-06-04 Ara-Werk Krämer GmbH + Co, 7441 Unterensingen Vorrichtung zum strangförmigen Austragen von pastösen Massen
DE3705741A1 (de) * 1987-02-23 1988-09-01 Hilti Ag Abgabevorrichtung fuer fliessfaehige massen

Also Published As

Publication number Publication date
US5025959A (en) 1991-06-25
DE8807574U1 (de) 1989-10-12
EP0345544A3 (fr) 1990-08-29

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