EP0559106A1 - Dispositif d'application pour fluids tel que adhésifs, produit d'étanchéité etc. - Google Patents

Dispositif d'application pour fluids tel que adhésifs, produit d'étanchéité etc. Download PDF

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Publication number
EP0559106A1
EP0559106A1 EP93103165A EP93103165A EP0559106A1 EP 0559106 A1 EP0559106 A1 EP 0559106A1 EP 93103165 A EP93103165 A EP 93103165A EP 93103165 A EP93103165 A EP 93103165A EP 0559106 A1 EP0559106 A1 EP 0559106A1
Authority
EP
European Patent Office
Prior art keywords
cylinder chamber
compressed air
workpiece
application
upper cylinder
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
EP93103165A
Other languages
German (de)
English (en)
Other versions
EP0559106B1 (fr
Inventor
Klaus Kleinmichel
Hartmut Böhle
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.)
Klaus Kleinmichel GmbH
Original Assignee
Klaus Kleinmichel 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 Klaus Kleinmichel GmbH filed Critical Klaus Kleinmichel GmbH
Publication of EP0559106A1 publication Critical patent/EP0559106A1/fr
Application granted granted Critical
Publication of EP0559106B1 publication Critical patent/EP0559106B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work

Definitions

  • the invention relates to an application device with which a medium such as adhesive, sealing compound, etc. can be applied to a workpiece.
  • the application device contains an application nozzle which is connected to the medium source and is fastened to a holder which is held on a robot arm in a substantially vertically movable manner.
  • the application device is preferably a freely programmable device that moves along a predetermined, programmable path over a workpiece to which the medium is to be applied.
  • the application device can also be arranged stationary, the workpiece then being moved accordingly so that the medium is applied in a predetermined manner.
  • a typical application of the application device according to the invention is the application of adhesive to windshields of motor vehicles.
  • the application nozzle from which the adhesive emerges, rests on the windshield with a certain contact pressure and describes an orbit around the edge region of the windshield in order to provide the latter with the adhesive.
  • the windshields used today have convex or concave curvatures, which the overlay application nozzle must follow, with manufacturing tolerances also being added, which can result in further deviations in the vertical direction.
  • the application nozzle can carry out the required vertical movement in the course of an application cycle, it is known to mount the application nozzle guided in a vertically movable manner on the application device by means of a helical spring.
  • the disadvantage here is that the deflection of the application nozzle changes the pressure with which it rests on the windshield, which can result in the pane being scratched.
  • This visual impairment of the windshield occurs to an increased extent if its edge area is coated with ceramic material using the screen printing process, since this ceramic material is extremely sensitive to scratch marks.
  • Another typical area of application of the application device according to the invention is the application of sealant to compensate for areas which do not fit.
  • the sealant must be applied to the workpiece with pressure to create the necessary contact with the substrate, which, for. B. can consist of an oiled sheet.
  • the conventional applicators again have the problem that they cannot apply the sealant with constant pressure, with the added factor that this pressure is also not adjustable to the desired size.
  • a piston / cylinder unit moves a metering tube downwards in order to immerse it in a gold suspension in a container.
  • the metering tube is raised by means of the piston / cylinder unit, pivoted by means of a further piston / cylinder unit and then lowered into a working position in which the metering tube is approximately 5 mm above a surface to be coated.
  • a dosing head which is provided with a pneumatically actuated feed cylinder, which ensures extremely precise control of the feed movement of the dosing pen and a precise return movement. Accordingly, the piston / cylinder unit is also provided here to move an application nozzle back and forth between a retracted rest position and an extended order position.
  • DE 33 40 369 A1 discloses an adhesive dispensing device in which a dispensing cylinder and a sleeve are moved down to a point at which an application nozzle comes into contact with a substrate, an adhesive droplet being squeezed between the end of a pen and the work surface.
  • the piston / cylinder unit of this device in turn only effects the alternate positioning in a working position and a retracted rest position.
  • An application device is known from DE 38 32 116 A1, in which a spiral spring dampens the impact of a nozzle tip on a substrate. With such a shock absorption, no constant contact pressure of an application nozzle on an uneven workpiece can be produced, since the spring force of a spiral spring varies with the compression of the spring.
  • the present invention has for its object to develop an applicator of the type specified in the preamble of claim 1 so that it applies a medium such as adhesive, sealing compound, etc. to an uneven workpiece with a substantially constant pressure.
  • the piston / cylinder unit is designed as a compressed air spring which applies a constant pressure upwards to the holder with the application nozzle. This ensures that the dead weight of the moving part of the applicator counteracts the force resulting from the compressed air, which reduces the contact pressure of the applicator nozzle, which is particularly advantageous in the case of very fast-working devices. It also ensures that there is a constant contact pressure for all unevenness of the workpiece, which the application nozzle follows due to the weight of the arrangement - not due to a stroke of the piston / cylinder unit forced by compressed air - so that, for example, windshields are reliably avoided Order process are scratched.
  • the piston / cylinder unit is designed in a further embodiment of the invention in such a way that a cylinder chamber is provided with a valve device which, in cooperation with a vent valve, keeps the pressure in this cylinder chamber constant while the other cylinder chamber is open to the surrounding atmosphere. If, according to an advantageous embodiment of the invention, the cylinder is firmly connected to the holder of the application nozzle, the upper cylinder chamber is provided with this valve device, while the lower cylinder chamber is open to the atmosphere.
  • the holder of the application nozzle is acted upon vertically upward by the compressed air spring, so that the force resulting from the pressurized air counteracts the dead weight of the movable part of the application device.
  • the air pressure it is therefore achieved that the application nozzle rests on the workpiece with a desired, predetermined pressure.
  • This pressure the size of which can thus be adapted to the particular application, remains constant in the event of any unevenness in the workpiece which the application nozzle follows, so that windshields are reliably prevented from being scratched during the application process.
  • an applied sealant e.g. can slip out of the intended application path due to insufficient application force, as has often been the case with oiled sheets.
  • the application nozzle is attached to a holder, which can include an outlet valve for the medium to be applied and a centering device for the application nozzle.
  • the holder is connected to a cylinder which is displaceably guided and surrounds a stationary piston, which in this case is an upper one and delimits a cylinder chamber.
  • the upper cylinder chamber is provided with a valve device which is connected to a compressed air source which compensates for a pressure drop when the upper cylinder chamber is enlarged as a result of an upward movement of the application nozzle by supplying compressed air, so that the pressure in the upper one Cylinder chamber remains constant.
  • the valve device is provided with a vent valve which, when the volume of the upper cylinder chamber is reduced, allows compressed air to escape in order to maintain the predetermined pressure level.
  • the lower cylinder chamber is open to the surrounding atmosphere, i.e. kept depressurized.
  • the opening is expediently covered so that no foreign particles can enter the lower cylinder chamber.
  • the pressure in the upper cylinder chamber is approximately in the range from 0.5 to 2.0 bar and is preferably approximately 0.7 bar.
  • the selected pressure is dependent on the weight of the movable, resting part of the application device or the robot arm and the desired contact force of the application nozzle, which can thus be set in the application device according to the invention.
  • the robot arm or application arm of the device according to the invention expediently has an upper flange, which in turn is attached to a flange of the other device part or robot.
  • the piston rod of the piston is expediently attached to this upper flange of the robot arm in a vertical orientation. It is also advantageously provided that two spaced-apart, likewise vertical guide rods are attached to the upper flange, which serve to guide the cylinder.
  • the application nozzle is held by a pneumatic spring, it is within the scope of the invention that the pressure can be applied hydraulically.
  • an application nozzle 1 is arranged at the lower end of a holder of a robot arm 3, generally designated 2.
  • the holder 2 contains an outlet valve, not shown, connected to the application nozzle 1 for the medium to be dispensed from the application nozzle 1, the connection to the medium source also not being shown in the figures.
  • a centering device 4 for the application nozzle 1 is arranged on the holder 2.
  • the holder 2 is attached to a cylinder 5, which surrounds a stationary piston 6, which divides the interior of the cylinder 5 into an upper cylinder chamber 7 and a lower cylinder chamber 8 divided.
  • the piston 6 is attached via a piston rod 9 to an upper flange 10 of the robot arm 3, the flange 10 in turn being attached to a counter flange, not shown, of the application device according to the invention.
  • the lower cylinder chamber 8 opens a valve assembly 11 with an air connection 12, which is connected to a compressed air source, not shown, and a vent valve 13.
  • the lower cylinder chamber 8 communicates with the surrounding atmosphere via an opening 14.
  • the cylinder 5 is held on a frame 15, which in turn is slidably guided on two vertical rods 16 which, like the piston rod 9, are fastened to the upper flange 10.
  • compressed air is introduced at a predetermined, selected pressure through the valve arrangement 11 into the upper cylinder chamber 7, which acts on the cylinder 5 with the frame 15 holding the latter and the holder 2 with the application nozzle 1 attached thereto, thereby increasing the dead weight this movable part of the applicator is reduced to the desired extent.
  • the application nozzle 1 rests with the resulting vertical force on a workpiece, not shown, for example a windshield.
  • the volume of the upper cylinder chamber 7 increases, whereby compressed air is simultaneously introduced into this cylinder chamber 7, the internal pressure of which thus remains constant.
  • the volume of the lower cylinder chamber 8 is reduced, air escaping through the opening 14, so that the lower cylinder chamber 8 remains depressurized.
  • the application nozzle 1 moves vertically downward in the course of its application path, the volume of the upper cylinder chamber 7 is reduced, while at the same time relieving pressure, by so much compressed air escaping from the ventilation valve 13 that the internal pressure in the upper cylinder chamber 7 remains constant.
  • air enters through the opening 14 into the lower cylinder chamber 8, which, as said, is always depressurized.
  • the pneumatic suspension of the application nozzle ensures that the application nozzle 1 always rests on the workpiece with a constant force, regardless of its vertical position, so that a suitable choice of the contact force can reliably prevent the pane glass from being scratched when an adhesive is applied to a windshield .

Landscapes

  • Coating Apparatus (AREA)
  • Sealing Material Composition (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP93103165A 1992-03-05 1993-02-27 Dispositif d'application pour fluids tel que adhésifs, produit d'étanchéité etc. Expired - Lifetime EP0559106B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4206999A DE4206999C2 (de) 1992-03-05 1992-03-05 Auftragsgerät für Medien wie Kleber, Dichtmasse etc.
DE4206999 1992-03-05

Publications (2)

Publication Number Publication Date
EP0559106A1 true EP0559106A1 (fr) 1993-09-08
EP0559106B1 EP0559106B1 (fr) 1996-08-21

Family

ID=6453316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103165A Expired - Lifetime EP0559106B1 (fr) 1992-03-05 1993-02-27 Dispositif d'application pour fluids tel que adhésifs, produit d'étanchéité etc.

Country Status (3)

Country Link
EP (1) EP0559106B1 (fr)
AT (1) ATE141530T1 (fr)
DE (2) DE4206999C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0983800A2 (fr) * 1998-09-03 2000-03-08 Volkswagen Aktiengesellschaft Dipositif d'encollage, en particulier pour les cockpits de véhicules à moteur
CN105251665A (zh) * 2015-11-03 2016-01-20 江苏海天微电子科技有限公司 一种自动贴片流水线上的点胶装置
CN105307417A (zh) * 2015-11-03 2016-02-03 江苏海天微电子科技有限公司 一种自动贴片流水线上的点胶及检测装置
DE102018102238A1 (de) 2018-02-01 2019-08-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verkleben und Abdichten von Naht- und Fügestellen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29814292U1 (de) 1998-08-10 1998-11-05 B & B Maschinenfabrik GmbH, 48496 Hopsten Auftragsdüse zum maschinellen Auftragen eines Mauerwerkbindemittels
DE102007037865B3 (de) † 2007-08-10 2008-09-25 Dürr Systems GmbH Applikator und Applikationsverfahren zur Applikation einer Dichtmasse auf eine Bördelnaht

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD115051A1 (fr) * 1974-09-19 1975-09-12
DE7735372U1 (de) * 1977-11-18 1978-03-02 Delo Kunststoffchemie Gmbh, 8032 Graefelfing Dosierkopf fuer ein dosiergeraet
CA1219843A (fr) * 1982-11-15 1987-03-31 Robert A. Kidder Debiteur de colle
JPS6481294A (en) * 1987-09-22 1989-03-27 Juki Kk Method and apparatus for forming thick-film circuit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 339 (C-385)15. November 1986 & JP-A-61 141 956 ( NATL HOUSE IND. CO. LTD ) *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 078 (M-570)10. März 1987 & JP-A-61 235 075 ( TOSHIBA ) 20. Oktober 1986 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0983800A2 (fr) * 1998-09-03 2000-03-08 Volkswagen Aktiengesellschaft Dipositif d'encollage, en particulier pour les cockpits de véhicules à moteur
EP0983800A3 (fr) * 1998-09-03 2004-03-31 Volkswagen Aktiengesellschaft Dipositif d'encollage, en particulier pour les cockpits de véhicules à moteur
CN105251665A (zh) * 2015-11-03 2016-01-20 江苏海天微电子科技有限公司 一种自动贴片流水线上的点胶装置
CN105307417A (zh) * 2015-11-03 2016-02-03 江苏海天微电子科技有限公司 一种自动贴片流水线上的点胶及检测装置
CN105251665B (zh) * 2015-11-03 2017-11-03 江苏海天微电子科技有限公司 一种自动贴片流水线上的点胶装置
CN105307417B (zh) * 2015-11-03 2018-06-29 江苏海天微电子科技有限公司 一种自动贴片流水线上的点胶及检测装置
DE102018102238A1 (de) 2018-02-01 2019-08-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verkleben und Abdichten von Naht- und Fügestellen
US11027496B2 (en) 2018-02-01 2021-06-08 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Adhesive bonding and sealing of seams and joints

Also Published As

Publication number Publication date
DE4206999A1 (de) 1993-09-16
EP0559106B1 (fr) 1996-08-21
ATE141530T1 (de) 1996-09-15
DE4206999C2 (de) 1996-02-29
DE59303463D1 (de) 1996-09-26

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