EP0537550B1 - Pistolet à air comprimé pour appliquer un matériau pâteux - Google Patents

Pistolet à air comprimé pour appliquer un matériau pâteux Download PDF

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Publication number
EP0537550B1
EP0537550B1 EP92116696A EP92116696A EP0537550B1 EP 0537550 B1 EP0537550 B1 EP 0537550B1 EP 92116696 A EP92116696 A EP 92116696A EP 92116696 A EP92116696 A EP 92116696A EP 0537550 B1 EP0537550 B1 EP 0537550B1
Authority
EP
European Patent Office
Prior art keywords
compressed air
piston
plunger
thrust
air gun
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
EP92116696A
Other languages
German (de)
English (en)
Other versions
EP0537550A1 (fr
Inventor
Rainer Brückner
Oliver Klempa
Reinhard Plehn
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.)
Deutsche Tecalemit GmbH
Original Assignee
Deutsche Tecalemit 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 Deutsche Tecalemit GmbH filed Critical Deutsche Tecalemit GmbH
Publication of EP0537550A1 publication Critical patent/EP0537550A1/fr
Application granted granted Critical
Publication of EP0537550B1 publication Critical patent/EP0537550B1/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
    • 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
    • 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 compressed air gun for applying pasty material with the features of the preamble of claim 1.
  • pasty materials are, for example, sealing compounds as are used in the automotive trade.
  • pasty material is also used in the construction industry sealants or the like. It is characteristic of the material processed in this way that it is in disposable material packs that are inserted into the receiving space of such a compressed air gun and are emptied by exposure to compressed air through a material outlet nozzle .
  • a known compressed air pistol is not only actuated by compressed air but also controlled and is equipped as a multi-purpose pistol for different working methods (DE-U-9 011 965).
  • This compressed air gun can alternatively be operated without an additional compressed air outlet and with an additional compressed air outlet, in addition to the actual conveying compressed air circuit, a parallel second compressed air circuit is implemented, which can be activated optionally.
  • the disposable material pack is introduced into the receiving space from the open end face of an overall circular cylindrical outer housing.
  • a material outlet nozzle with a base as a structural unit is screwed onto a nozzle of the disposable material pack. It is held by a cap screwed onto the outer casing.
  • the disposable material pack is pressed with the end assigned to the opposite end face onto a tapping bolt, which then pierces a protective cover on the back of the disposable material pack and forms the connection between a compressed air connection and the pressure side of a follower piston.
  • the follower piston is part of the disposable material package, it can in the disposable material pack are pushed towards the material outlet nozzle by compressed air. Compressed air actuation or control takes place from a valve arrangement located in a handle on the outer housing.
  • a secondary compressed air space is provided on the pressure side of the following piston, which enables compressed air to be added to the material already emerging from the material outlet nozzle.
  • a problem with the known, previously explained compressed air pistol is that the follower piston inside the disposable material pack is often unable to shift in the correct position or in the correct position, but rather jams in the disposable material pack.
  • the disposable material pack must then be removed and straightened again in the meantime; in extreme cases, the contents of the disposable material pack cannot be removed completely.
  • a longer extension of the follower piston, which would make tilting in the disposable material pack less likely, would on the one hand significantly increase the friction of the follower piston when advancing, and on the other hand would reduce the filling quantity of the disposable material packs which are standardized per se.
  • a compressed air gun for applying pasty material is known (DE-A-36 07 176), which has a half-shell-shaped outer housing in a partial area. A disposable material pack can be inserted from above into the partial area of the outer housing.
  • This compressed air gun has a push piston that is designed as a telescopic piston.
  • the front telescopic section of the thrust piston is open on the side from which it is pressurized, that is to say on its pressure side, and closed on its end face which comes into contact with the follower piston in the disposable material pack.
  • the overall pneumatic dead space is large.
  • the invention is based on the object, the above-described compressed air pistol, from which the invention is based, so that the total length of the compressed air pistol is as short as possible and the pneumatic dead space is as small as possible when the follower piston is shifted in the correct position.
  • the push piston is designed as a telescopic piston with two or more telescopic sections.
  • the length required for the push piston in the compressed air gun in addition to the length of the disposable material pack is considerably shorter.
  • the inherent disadvantage of a large pneumatic dead space inside the telescope sections is avoided.
  • the compressed air gun shown in the single figure of the drawing is intended and suitable for applying pasty material, for example sealing material or the like. In principle, it can also be operated with other pressure media apart from air, but usually compressed air is used.
  • the compressed air gun initially has an outer housing 1 which can be opened on at least one side and which, in the illustrated and preferred exemplary embodiment, is of circular-cylindrical design.
  • the outer housing 1 there is accordingly a circular-cylindrical receiving space 2 for a standardized disposable material pack 3.
  • a material outlet nozzle 5 corresponding to an outlet tip 4 of the disposable material pack 3 is arranged on the openable side of the outer housing 1.
  • Only indicated on the outer housing 1 is a compressed air connection 6, specifically in a handle 7 which is attached to the outer housing 1 and in which a valve arrangement 8 for actuating and controlling compressed air is accommodated.
  • the disposable material pack 3 is provided on the side opposite the outlet tip 4 with a follower piston 9 which is displaceable in the disposable material pack 3 in the direction of the outlet tip 4 and pushes the material in front of it and thus ejects it from the material outlet nozzle 5.
  • the single figure of the drawing does not show the material in the disposable material pack 3, but it can be seen that this material is pressed out of the material outlet nozzle 5 by advancing the follower piston 9.
  • the single figure shows both positions of the follower piston 9, the retracted position at the beginning of a newly inserted disposable material pack 3 in the lower part and the position with the follower piston 9 advanced corresponding to a completely emptied disposable material pack 3 in the upper part.
  • the compressed air is conducted from the compressed air connection 6 to the side of the follower piston 9 facing away from the material outlet nozzle 5, which results in the previously described advance movement of the follower piston 9 in accordance with the control by means of the handle 7 and valve arrangement 8.
  • a secondary compressed air circuit causing atomization of the pasty material is provided.
  • This has a secondary air connection 10, a secondary air annular space 11 in the outer housing 1 and a secondary air nozzle 12.
  • the secondary air nozzle 12 concentrically surrounds the material outlet nozzle 5 in the exemplary embodiment shown. Their function is described extensively in the prior art, which was explained at the beginning, and reference may be made to this.
  • the open side of the outer housing 1, from which the disposable material pack 3 is inserted, is closed by a screwed-on cap 13, which carries the secondary air nozzle 12.
  • the material outlet nozzle 5 is located as part of a base plate 14 between the cap 13 and the outer housing 1 and this assembly is connected to the disposable material pack 3 by means of a thread.
  • a push piston 15 is arranged in the outer housing 1 on the side of the follower piston 9 facing away from the material outlet nozzle 5 and is displaceably guided in a longitudinal guide 16 in the outer housing 1, the compressed air being directed to the pressure side of the push piston 15 facing away from the follower piston 9 is, the thrust piston 15 comes to rest on the follower piston 9, at least in terms of its effectiveness, and the follower piston 9 from the thrust piston 15, which is moved by compressed air, is in the correct position can be pushed forward.
  • the thrust piston 15 canted on the one hand because of the longitudinal guide 16, but on the other hand because of its length itself or not practically not in the outer housing 1. Since the Thrust piston but in any case effectively, if not in terms of area, comes to bear on the follower piston 9 on the pressure side over a large area, the follower piston 9 is acted upon by the feed force so uniformly that it is pushed in the correct position. Tilting of the follower piston 9 cannot occur.
  • the push piston 15 dips into the disposable material pack 3 from the open side and pushes the follower piston 9 located therein forward.
  • the contact surface 17 has only a slightly smaller diameter than the diameter of the follower piston 9, which leads to the largest possible support of the follower piston 9.
  • the large outer diameter of the thrust piston 15 in the illustrated embodiment has the further advantage that, if the thrust piston 15 is slightly tilted, it comes to rest with the outside on the inside of the disposable material pack 3, so that the maximum possible tilting on the follower piston 9 is practically not is noticeable.
  • the outer housing 1 does not have to be longer than the one-way, except for a small space that is required for the tapping mandrel or the like Material pack 3.
  • the push piston 15 has a disadvantage, since in the one-piece design of the push piston 15, the length of the outer housing 1 must be approximately twice the length of the disposable material pack 3.
  • the exemplary embodiment shown makes the previously described structural disadvantage of the compressed air pistol less significant quantitatively, namely in that the thrust piston 15 is designed as a telescopic piston with two or more telescopic sections 18. Two or three telescopic sections 18 are preferred, two telescopic sections 18 are shown, which are sealed against one another. As a result, the length required for the push piston 15 in addition to the length of the disposable material pack 3 is practically halved.
  • the push piston 15 or the front telescopic section 18 of the push piston 15 forms a closed surface. This is shown by the exemplary embodiment shown, which shows the front telescopic section 18 of the thrust piston 15 as an open cylindrical sleeve on the side facing the follower piston 9. This construction with a closed surface on the pressure side keeps the pneumatic dead space as small as possible.
  • the two telescopic sections 18 present in the exemplary embodiment shown are sealed against one another in that an intermediate piece 20, which is provided with sealing elements 19 to both telescopic sections 18 and provides a sliding bearing for the front telescopic piston 18 in the rear telescopic piston 18, is arranged between the telescopic sections 18.
  • the intermediate piece 20 is fixedly attached to the end of the front telescopic section 18 remote from the material outlet nozzle 5, that is to say it is moved together with this telescopic section 18 in the rear telescopic section 18, which is readily apparent from the drawing in comparison of the two representations. It goes without saying that the feed movement of the two telescopic sections 18 must be limited, which is realized here by correspondingly flanged limiting flanges on the rear telescopic section 18.
  • the longitudinal guide 16 of the thrust piston 15 or the longitudinal guide of the telescopic section 18 realized by the intermediate piece 20 must, at least in terms of effect, be sufficiently long to ensure a guide that is largely tilt-free. This is shown in the drawing.
  • the thrust piston 15 is to come into contact with the follower piston 9 in any event over a large area.
  • This can be done by the annular contact surface 17 shown in the exemplary embodiment, a support having at least three points distributed would also be conceivable.
  • Much will also depend on how rigid the follower piston 9 itself is made.
  • the follower piston 9 can also be functionally formed by pushing the bottom of the disposable material pack 3 as such forward with the wall, both of which must be deformable, towards the outlet tip 4 becomes. Then, as it were, the entire disposable material pack 3 is folded together by the advancing pushing piston 15 or pushed together from behind. The bottom of the disposable material pack 3 then acts like a follower piston.
  • the effect is corresponding, but here the contact surface 17 on the thrust piston 15 would have to be a continuous, or at least a physically large surface.
  • the embodiment shown is further characterized by a particularly skillful guidance of the compressed air. It is namely the case that the compressed air connection 6 is located in the central region of the receiving space 2 and that the thrust piston 15 forms an annular space 21 with the outer housing 1 in the retracted position, which at the end facing away from the material outlet nozzle 5, possibly via detour channels 22 embedded in the outer housing 1, is connected to the pressure side of the thrust piston 15. It can clearly be seen in the single figure in the lower half how the detour channels 22, which are introduced here in the outer housing 1, enable the compressed air to reach the pressure side of the front telescopic section 18 even when the thrust piston 15 is in the fully retracted position. In terms of design, this particularly fits the surface of the thrust piston 15 that is closed on the pressure side.
  • the outer housing 1 For the construction of the outer housing 1, it lends itself for manufacturing and handling reasons, a division approximately in the middle to make.
  • the outer housing 1 is thus designed in two parts, one part essentially holding the disposable material pack 3 and the other part essentially holding the thrust piston 15 (in the retracted position).
  • a middle part 23 which is provided here for constructional reasons, carries the slide bearing forming the longitudinal guide 16 for the outer, rear telescopic section 18 of the thrust piston 15. However, it is covered from the outside by one part of the outer housing 1 and is not recognizable.
  • the handle 7 is also attached to this part of the outer housing 1.
  • the two parts of the outer housing 1 are screwed together in the illustrated embodiment.
  • the construction of the compressed air gun according to the invention can be designed in terms of material so that the push piston 15 and possibly also the outer housing 1 are made of plastic.
  • the choice of material is determined by the pressures to be expected and the operating conditions.

Landscapes

  • Coating Apparatus (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Confectionery (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Jellies, Jams, And Syrups (AREA)

Claims (7)

  1. Pistolet à air comprimé pour l'application d'une matière pâteuse, comprenant un logement externe (1) apte à s'ouvrir au moins d'un côté, muni d'un espace de réception (2) pour un emballage à jeter (3) qui est muni, du côté opposé à l'extrémité de sortie (4), d'un piston progressif (9) apte à coulisser dans la direction de l'extrémité de sortie (4), qui pousse la matière devant lui, partant qui l'expulse, ou bien dans lequel le fond qui se détourne de l'extrémité de sortie (4) fait office, comme tel, de piston progressif (9), et l'emballage à jeter (3) est poussé de manière conjointe lorsque le fond faisant office de piston progressif (9) exerce une poussée vers l'avant, une tuyère d'évacuation de matière (5) correspondant à une extrémité de sortie (4) de l'emballage à jeter (3) et un raccord (6) pour l'air comprimé,
    dans lequel l'air comprimé est guidé à partir du raccord (6) pour l'air comprimé sur le côté du logement externe (1) se détournant de la tuyère d'évacuation de matière (5),
    dans lequel, dans le logement externe (1), est disposé un piston de poussée (15) sur le côté qui se détourne de la tuyère d'évacuation de matière (5) et qui est guidé en coulissement dans un guidage longitudinal (16) pratiqué dans le logement externe (1),
    dans lequel l'air comprimé est guidé sur le côté pression du piston de poussée (15), qui se détourne de la tuyère d'évacuation de matière (5), et
    dans lequel le piston de poussée (15) mis en mouvement par de l'air comprimé peut coulisser vers l'avant en position correcte,
    caractérisé en ce que
    le piston de poussée (15) est réalisé en forme de piston télescopique comprenant deux sections télescopiques (18) ou plus qui sont étanchées l'une par rapport à l'autre et en ce que la section télescopique avant (18) du piston de poussée (15) forme une surface fermée sur son côté pression.
  2. Pistolet à air comprimé selon la revendication 1, caractérisé en ce que le piston de poussée (15) présente une surface d'appui (17) de forme annulaire, de préférence de forme circulaire.
  3. Pistolet à air comprimé selon la revendication 1 ou 2, caractérisé en ce qu'entre les sections télescopiques (18), est disposé un élément intermédiaire (20) muni d'éléments d'étanchéité (19) en direction des deux sections télescopiques (18), formant un palier de glissement pour le piston télescopique avant (18) dans le piston télescopique arrière (18).
  4. Pistolet à air comprimé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le raccord (6) pour l'air comprimé se situe dans la zone médiane de l'espace de réception (2) et en ce que le piston de poussée (15), dans sa position de retrait, forme un espace annulaire (21) avec le logement externe (1) qui est relié, à son extrémité qui se détourne de la tuyère d'évacuation de matière (5), éventuellement à l'intervention de canaux de déviation (22) encastrés dans le logement externe (1), avec le côté pression du piston de poussée (15).
  5. Pistolet à air comprimé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le logement externe (1), vu en direction longitudinale, est séparé environ au milieu et en ce que, dans la première partie, vient se loger essentiellement l'emballage à jeter (3) et, dans l'autre partie, vient se loger essentiellement le piston de poussée (15) à l'état rétracté.
  6. Pistolet à air comprimé selon la revendication 5, caractérisé en ce que les deux parties sont vissées l'une à l'autre.
  7. Pistolet à air comprimé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le piston de poussée (15) et éventuellement également le logement externe (1) sont constitués d'une matière synthétique.
EP92116696A 1991-10-16 1992-09-30 Pistolet à air comprimé pour appliquer un matériau pâteux Expired - Lifetime EP0537550B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4134141 1991-10-16
DE4134141A DE4134141C2 (de) 1991-10-16 1991-10-16 Druckluftpistole zum Auftragen von pastösem Material

Publications (2)

Publication Number Publication Date
EP0537550A1 EP0537550A1 (fr) 1993-04-21
EP0537550B1 true EP0537550B1 (fr) 1995-05-03

Family

ID=6442738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116696A Expired - Lifetime EP0537550B1 (fr) 1991-10-16 1992-09-30 Pistolet à air comprimé pour appliquer un matériau pâteux

Country Status (5)

Country Link
EP (1) EP0537550B1 (fr)
JP (1) JPH0724385A (fr)
AT (1) ATE121974T1 (fr)
DE (2) DE4134141C2 (fr)
ES (1) ES2072071T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5921181A (en) * 1996-08-14 1999-07-13 Ritter; Ralf Pneumatic cartridge expressing device
DE29819715U1 (de) 1998-11-04 1999-01-07 Kress-Elektrik GmbH & Co Elektromotorenfabrik, 72406 Bisingen Vorrichtung zum Auspressen und dosierten Abgeben von fließfähigen Massen
US6152333A (en) * 1998-11-04 2000-11-28 Kress-Elektrik Gmbh & Co., Elektromotorenfabrik Apparatus for extrusion and metered delivery of free-flowing substances
US6926177B1 (en) * 2000-03-31 2005-08-09 William M. Scott Device for dispensing substance from a cartridge
DE202005008831U1 (de) * 2005-06-03 2006-10-12 Deutsche Tecalemit 2000 Gmbh & Co. Kg Druckluftpistole
DE202008005941U1 (de) * 2008-04-29 2008-07-10 Gmeilbauer, Engelbert Vorrichtung zum Ausbringen einer pastösen Masse
EP2468414B1 (fr) * 2010-12-23 2015-12-23 P C Cox Limited Distributeur pneumatique

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755003A (en) * 1954-11-26 1956-07-17 William A Sherbondy Dispensing device for plastic materials and the like
DK116620B (da) * 1963-05-30 1970-01-26 N Madsen Kraftdrevet håndsprøjte, især til plastiske masser såsom kit.
DE7628498U1 (de) * 1976-09-11 1977-01-13 Durol Gmbh & Co Kg Chemische Fabrik, Eriskirch, Bodensee, 7991 Eriskirch Pistole zum verarbeiten von pastoesen massen
DE3200542A1 (de) * 1982-01-11 1983-07-21 Teroson Gmbh, 6900 Heidelberg Verfahren zum entleeren von kartuschenartigen behaeltern sowie behaelter zur durchfuehrung des verfahrens
JPS61153892A (ja) * 1984-12-27 1986-07-12 Janome Sewing Mach Co Ltd フロツピ−デイスク装置のシヤ−シ
DE3607176C2 (de) * 1986-03-05 1994-04-28 Hilti Ag Dosiergerät für plastische Massen
DE3919591A1 (de) * 1988-06-16 1989-12-21 Ruediger Dipl Kfm Otto Vorrichtung zum ausstossen von insbesondere pastenfoermigen stoffen aus einem gehaeuse
DE9011965U1 (de) * 1990-08-17 1990-10-18 Deutsche Tecalemit Gmbh, 4800 Bielefeld Druckluftgesteuerte und -betätigte Mehrzweckpistole zum Auftragen pastöser Materialien

Also Published As

Publication number Publication date
DE4134141C2 (de) 1994-03-24
DE4134141A1 (de) 1993-04-22
ATE121974T1 (de) 1995-05-15
DE59202077D1 (de) 1995-06-08
ES2072071T3 (es) 1995-07-01
JPH0724385A (ja) 1995-01-27
EP0537550A1 (fr) 1993-04-21

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