EP0254969B1 - Dispositif pour l'extrusion de matières pâteuses - Google Patents

Dispositif pour l'extrusion de matières pâteuses Download PDF

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Publication number
EP0254969B1
EP0254969B1 EP87110251A EP87110251A EP0254969B1 EP 0254969 B1 EP0254969 B1 EP 0254969B1 EP 87110251 A EP87110251 A EP 87110251A EP 87110251 A EP87110251 A EP 87110251A EP 0254969 B1 EP0254969 B1 EP 0254969B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
pressure member
spring
tubular bag
pressure
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
EP87110251A
Other languages
German (de)
English (en)
Other versions
EP0254969A1 (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
Priority claimed from DE19868620379 external-priority patent/DE8620379U1/de
Application filed by Ara Werk Kraemer GmbH and Co filed Critical Ara Werk Kraemer GmbH and Co
Priority to AT87110251T priority Critical patent/ATE53515T1/de
Publication of EP0254969A1 publication Critical patent/EP0254969A1/fr
Application granted granted Critical
Publication of EP0254969B1 publication Critical patent/EP0254969B1/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
    • B05C17/00583—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 the container for the material to be dispensed being deformable
    • 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
    • B05C17/00576—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 characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • 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 the strand-like discharge of pasty masses contained in deformable tubular bags, with a cylinder which can be loaded with a tubular bag, the end face of which, in the discharge direction, has a central opening or outlet opening aligned with the spout connection of the tubular bag, one axially in the cylinder against the Tubular bag displaceable, essentially piston-shaped pressure piece and a device for axial displacement of the pressure piece.
  • British patent applications 2 088 998 and 2 090 336 relate to discharge devices for tubular bags.
  • the problem of pinching the bag is already known from them (cf. GB-A 2 090 336, page 2, lines 8 to 21). It is proposed there to remedy this problem by designing the piston face side in a particularly profiled manner (cf. GB-A 2 090 336, page 2, lines 21 to 25 and FIGS. 3 to 5 and GB-A 2 088 998, 3 and 3a).
  • this does not prevent the aforementioned after-running of the pasty mass.
  • the invention has for its object to improve a device of the type described in such a way that you can work with it without accepting the aforementioned uncontrolled leakage of tubular bag contents and at the same time prevent the bag film from being pinched.
  • the pressure piece has a pressure relief spring which is supported on the cylinder wall and cooperates with it.
  • This spring causes the pressure piece after its pressure relief, i.e. at the end or during an interruption of the discharge process, it does not remain in the respective working position, but is moved back by an amount dependent on the spring travel, as a result of which the contents of the tubular pouch are also depressurized and the mass has no reason to leave uncontrolled.
  • the free end of the pressure relief spring can be moved along the inner wall of the cylinder with friction.
  • the pressure relief spring which could also be called a "return spring” because of the effect it exerts on the pressure piece after completion or during an interruption of the discharge process, prevents the tubular bag from pinching the pressure bag between the pressure piece and the cylinder inner wall without problems .
  • the pressure relief spring is preferably flat and designed so that it can be brought into contact with the piston-side end of the tubular bag.
  • the pressure relief spring can be strip-shaped or star-shaped.
  • the pressure piece has on its side facing the tubular bag a spring washer provided with radial lobes delimited by radial slots, the outer diameter of which is greater than the inner diameter of the cylinder before the pressure piece is inserted into the cylinder, with the result that the spring lobes follow support the insertion of the pressure piece against the inner wall of the cylinder.
  • the length of the spring or the outer diameter of the aforementioned spring washer is preferably 8-12% larger than the inner diameter of the cylinder.
  • the edge areas of the spring washer are preferably directed away from the pressure piece, that is, they run in the direction of the tubular bag.
  • the pressure piece can be concave on its side pointing in the discharge direction, ie towards the tubular bag.
  • the radius of the cavity thus formed is preferably smaller than the radius of the spring which is clamped but is not loaded in the pressure direction.
  • the pressure relief spring can preferably be lifted off the pressure piece at least in the area of its spring tabs and is screwed to the pressure piece preferably via a central, axially extending screw, preferably with the interposition of a washer. It can be made of a resilient plastic, preferably polyethylene.
  • a spring-elastic plastic offers the advantage that it causes only minimal frictional forces, so that it is always possible to work with a contact pressure which essentially corresponds to the working pressure.
  • an elastic seal can be provided to seal the pressure piece against the inner wall of the cylinder, the outer diameter of which is preferably larger than the inner diameter of the cylinder before insertion into the cylinder.
  • this seal is designed as a sleeve seal and is arranged on the end face of the pressure piece facing away from the tubular bag.
  • the pressure piece which is preferably made of plastic, can have one or more circumferential grooves. This makes the pressure piece lighter and easier to move.
  • an elastic sealing ring acting radially against the inner wall of the cylinder is arranged in such a groove, in particular in the central region. If a pneumatically operating device is provided for the axial displacement of the pressure piece, this sealing ring can have a sealing lip that can be expanded under the action of compressed air, so that the pressure piece can be inserted into the cylinder without any problems and yet an optimal all-round seal is ensured during the working process.
  • the sealing ring is preferably designed as a profile ring, which has a small contact area with the inner wall of the cylinder, which contact surface is essentially independent of the pressurized air, thereby keeping the friction small.
  • the pressure diameter of the pressure piece can be substantially matched to the inside diameter of the cylinder. Tilting of the pressure piece within the cylinder can be prevented with particular advantage by guide cams provided in the pressure piece, which are evenly distributed in at least one, preferably two levels around the pressure piece circumference and ensure safe and low-friction guidance of the pressure piece within the cylinder.
  • the two levels are preferably provided on both sides of the sealing ring.
  • the cylinder of the device according to the invention can have a cover, preferably screwable, with a central opening, which is detachably connected to it and merges into a discharge nozzle or nozzle that can be screwed onto the cover.
  • this lid On its inside, this lid preferably has a flat contact surface for the tubular bag, in the center of which there is preferably a depression which serves to accommodate the edge of the cut-open bag and which preferably merges conically into the central opening or outlet opening.
  • the flat contact surface offers the advantage that the tubular bag can be practically completely emptied under the action of the pressure piece acting on it.
  • the aforementioned cover can have an outer, essentially cylindrical extension for screwing the discharge nozzle, this extension preferably having an external thread, in particular in such a way that conventional cartridge nozzles can be screwed to it.
  • the outlet opening in the neck is preferably dimensioned in the inner diameter so that it essentially corresponds to the outlet opening of conventional cartridges. This enables the same conditions to be achieved as when processing cartridges.
  • the above-mentioned lid is preferably formed in two parts, one lid part being formed by a union nut and the other lid part being formed by an extension piece which has the aforementioned flat contact surface for the tubular bag and preferably the depression which serves to accommodate the edge of the cut-open bag.
  • a two-part cover design has the advantage that the cylinder is opened without rotating the attachment piece and, for example, if the color of the tubular bag is changed at any time, i.e. also before its final emptying, together with the attachment piece assigned to it in the cover and the discharge nozzle connected to it against another Tubular bag can be exchanged with another extension.
  • the aforementioned extension is preferably dimensioned such that it can be inserted at least partially on the front side into the interior of the cylinder.
  • a latching connection can be provided between the two cover parts, that is to say between the union nut and the extension piece, which prevents the two cover parts from unintentionally loosening from one another.
  • the device shown in Fig. 1 is designed like a pistol. It has a handle 1 and a cylinder 2 carried by it.
  • the cylinder 2 is provided with a screw cap 3 at its end shown on the left in the drawing and with a bottom 4 at its other end.
  • the screw cap 3 has a central opening which merges into a discharge spout or nozzle 5.
  • the cylinder 2 can have a pasty mass containing tubular bag 6 are loaded.
  • a pressure piece 7 is tightly guided, which can be pressurized with compressed air from the side facing away from the screw cap 3, which can be supplied to the cylinder 2 via a line 8.
  • This line 8 connects an adjustable compressed air valve 10, which is arranged in the handle 1 and can be actuated via a lever 9, to the bottom 4 of the cylinder 2.
  • a compressed air line 11 leading into the bottom of the handle 1 leads to the compressed air valve 10 Relieves excess pressure in the cylinder if the compressed air supply is interrupted.
  • the end of the essentially piston-shaped pressure piece 7 facing the screw cap 3 is concave and, with the interposition of a washer 12, is screwed to a spring washer 13 made of an elastic plastic via a central screw 14.
  • the spring washer 13 (see FIG. 3) is circular in plan view and is provided with twelve radially extending slots 15 which subdivide its edge region into twelve radially extending spring tabs 16.
  • the diameter of the spring washer 13 after screwing it to the pressure piece 7 is approximately 10% larger than the inside diameter of the cylinder 2.
  • the end of the pressure piece 7 facing away from the screw cap 3 is provided with an elastic, preferably resilient sleeve seal 17, the outer diameter of which before insertion into the cylinder 2 is larger than its inner diameter, so that it ensures tight guidance of the pressure piece 7 in the cylinder 2.
  • the spring tabs 16 are compressed somewhat and pressed into the cavity of the pressure piece 7 (cf. FIG. 4). After the discharge process has ended, they are supported against the inner wall of the cylinder 2 and also against the folded and consolidated outer region 117 of the tubular bag and press the pressure piece 7, which is no longer pressurized with air, by the amount s in the direction of the bottom 4 of the cylinder 2 ( see Fig. 5). The latter has the result that the content of the tubular bag 6 is no longer under pressure and therefore no longer has any reason to exit via the spout 5.
  • the pressure piece 7, partially cut in FIG. 6, also carries a spring washer 13 with radially extending slots 15 on its front side pointing to the left in the drawing and spring tabs 16 running radially between them.
  • the pressure piece 7 'shown in FIG. 6 is somewhat in diameter smaller than the pressure piece 7 shown in FIG. 2. In contrast to this, it has no cylindrical outer surface. Rather, it is provided with two grooves 19, 20 running all around and four guide cams 21 each on the outer edge of the two end faces.
  • a profiled sealing ring 22 is arranged, which has a sealing lip 23 which can be expanded under the action of compressed air and has a narrow, circumferential sealing edge.
  • the cover 24 shown in FIG. 7 has an extension 26 screwed to a discharge nozzle 25 and a union nut 27.
  • the extension piece 26 has on its side facing away from the discharge nozzle 25 a flat tubular bag contact surface 28 and on the other side a two-stage extension 29 to which the discharge nozzle 25 is screwed.
  • a depression 30 which serves to receive the edge of a cut-open bag, which is continued in a central opening in the projection 29 and thus communicates with the discharge nozzle 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (14)

1. Dispositif pour l'évacuation en forme de corde de masses pâteuses contenues dans des sachets tubulaires (6) déformables, ce dispositif étant muni d'un cylindre (2) que l'on peut charger avec un sachet tubulaire, ce cylindre présentant, sur sa face frontale dirigée dans le sens de l'évacuation, un évidement central affleurant au raccord de douille du sachet tubulaire un élément de pression (7) essentiellement en forme de piston pouvant coulisser dans le cylindre axialement à l'encontre du sachet tubulaire et un dispositif pour le coulissement axial de l'élément de pression, caractérisé en ce que l'élément de pression (7) présente, sur sa face frontale du côté de l'évacuation, un ressort de détente de pression (13) s'appuyant contre la paroi du cylindre (2) et possédant des languettes radiales (16) de ressort, le ressort de détente de pression coopérant avec la paroi du cylindre.
2. Dispositif selon la revendication 1, caractérisé en ce que le ressort de détente de pression (13) est plat et peut venir se disposer contre l'extrémité du sachet tubulaire (6) se trouvant du côté du piston.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'élément de pression (7) comporte, sur sa face dirigée vers le sachet tubulaire (6), un ressort plat (13) muni de languettes de ressort (16) limitées par des fentes radiales (15), ressort plat dont le diamètre externe, avant l'introduction de l'élément de pression (7) dans le cylindre (2), est supérieur au diamètre interne du cylindre (2), les zones marginales du ressort plat (13) étant dirigées, de préférence, à l'écart de l'élément de pression (7).
4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le diamètre externe du ressort de détente de pression réalisé en forme de ressort plat (13), avant l'introduction de l'élément de pression (7) dans le cylindre (2), est supérieur de 8-12% au diamètre interne du cylindre (2).
5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que le ressort de détente de pression (13), à l'état non sollicité axialement, est écarte de l'élément de pression (7) au moins dans la zone marginale des languettes de ressort (16).
6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de pression (7) est réalisé en forme concave sur son côté dirigé vers l'évacuation, en particulier, le ressort de détente de pression (13) est vissé à l'élément de pression (7) à l'intervention d'une vis (14) centrale s'étendant dans le sens axial, une rondelle de calage (12) y étant, de préférence intercalée.
7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort de détente de pression (13) est constitué d'une matière synthétique élastique faisant ressort, de préférence du polyéthylène.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de pression (7) est muni d'un joint étanche (17) élastique, qui agit entre l'élément de pression et la paroi interne du cylindre (2), au moins lorsque s'exerce une sollicitation d'air comprimé sur le côté opposé au sachet tubulaire (6), joint étanche dont le diamètre externe, avant l'introduction dans le cylindre (2) est, de préférence, supérieur au diamètre interne du cylindre (2), l'élément de pression (7) présentant, de préférence au moins une rainure périphérique (19, 20), dans laquelle est disposé un anneau d'étanchement (22) élastique agissant radialement contre la paroi interne du cylindre (2).
9. Dispositif selon la revendication 8, caractérisé en ce que l'anneau d'étanchement (22) présente une lèvre d'étanchement (23) qui peut s'élargir sous la sollicitation excercée par l'air comprimé, l'anneau d'étanchement (22) étant, en particulier un anneau profilé dont la surface de contact avec la paroi interne du cylindre (2) est essentiellement indépendante d'une sollicitation exercée par l'air comprimé.
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de pression (7), afin d'empêcher son coincement, présente au moins trois ergots de guidage (21) faisant saillie vers l'extérieur, dans au moins un de préférence deux plans, les plans étant prévus, de préférence des deux côtés du joint étanche élastique.
11. Dispositif selon l'une quelconque des revendications précédentes, dans lequel le cylindre présente, sur son extrémité d'évacuation, un couvercle qui lui relié de manière amovible, de préférence que l'on peut visser, muni d'un alésage central qui aboutit dans une douille d'évacuation pouvant se visser au couvercle, caractérisé en ce que le couvercle (24) présente, sur sa face interne, une surface plane (28) de contact pour le sachet tubulaire (6).
12. Dispositif selon la revendication 11, caractérisé en ce qu'au centre de la surface plane de contact (28) est prévu un renfoncement (30) élargi, dans lequel vient se loger le bord du sachet (6) découpé, ce renfoncement aboutissant, de préférence, en cône à l'ouverture d'évacuation.
13. Dispositif selon la revendication 11 ou 12, caractérisé en ce que le couvercle (24) présente une saillie (29) essentiellement cylindrique pour le vissage à la douille d'évacuation (25), cette saillie présentant, de préférence un filet externe pouvant s'adapter à des buses-cartouches traditionnelles, le diamètre interne de l'ouverture d'évacuation (31) pratiquée dans la saillie (29) correspondant, de préférence essentiellement à celui d'ouvertures d'évacuation de cartouches traditionnelles.
14. Dispositif selon l'une quelconque des revendications 11 à 13, caractérisé en ce que le couvercle (24) est réalisé en deux parties, une partie étant réalisée en écrou d'accouplement (27) et l'autre partie étant réalisée en élément de saillie (26) de buse, cet élément présentant la surface plane de contact (28) pour le sachet tubulaire (6) et, de préférence le renfoncement (30) dans lequel vient se loger le bord du sachet (6) découpé, l'élément de saillie (26) de buse pouvant s'introduire, de préférence au moins en partie, par sa face frontale, au sein du cylindre (2).
EP87110251A 1986-07-30 1987-07-16 Dispositif pour l'extrusion de matières pâteuses Expired - Lifetime EP0254969B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110251T ATE53515T1 (de) 1986-07-30 1987-07-16 Vorrichtung zum strangfoermigen austragen von pastoesen massen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8620379U 1986-07-30
DE19868620379 DE8620379U1 (de) 1986-07-30 1986-07-30 Vorrichtung zum strangförmigen Austragen von pastösen Massen
DE8705030U 1987-04-04
DE8705030U DE8705030U1 (fr) 1986-07-30 1987-04-04

Publications (2)

Publication Number Publication Date
EP0254969A1 EP0254969A1 (fr) 1988-02-03
EP0254969B1 true EP0254969B1 (fr) 1990-06-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110251A Expired - Lifetime EP0254969B1 (fr) 1986-07-30 1987-07-16 Dispositif pour l'extrusion de matières pâteuses

Country Status (4)

Country Link
US (1) US4840293A (fr)
EP (1) EP0254969B1 (fr)
JP (1) JPH07106331B2 (fr)
DE (2) DE8705030U1 (fr)

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DE102005007055A1 (de) * 2005-02-15 2006-08-24 Kettenbach Gmbh & Co. Kg Vorrichtung zum Ausbringen von Ein- oder Mehrkomponentenmassen und Kolben hierfür
DE102009034774A1 (de) 2009-07-25 2011-01-27 Bona Gmbh Deutschland Auftragsdüse für viskose Klebstoffe

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EP0380792B1 (fr) * 1988-12-13 1994-10-19 Günther Dipl.-Ing. Knieriem Dispositif de décharge
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US6712245B2 (en) * 2002-07-15 2004-03-30 Arther Barrett Venting plunger for caulk cartridges
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DE102008063502A1 (de) * 2008-12-17 2010-06-24 Fischbach Kg Kunststoff-Technik Auspresswerkzeug
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JP5101743B1 (ja) 2012-04-02 2012-12-19 加賀ワークス株式会社 空圧ディスペンサ用プランジャ
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US11712711B2 (en) 2018-09-19 2023-08-01 Prc-Desoto International, Inc. Expandable plunger head assemblies for sealant dispensing guns
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CN112459430B (zh) * 2020-11-17 2021-11-16 安徽金贺财建筑工程有限公司 美缝装置

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DE102005007055A1 (de) * 2005-02-15 2006-08-24 Kettenbach Gmbh & Co. Kg Vorrichtung zum Ausbringen von Ein- oder Mehrkomponentenmassen und Kolben hierfür
DE102009034774A1 (de) 2009-07-25 2011-01-27 Bona Gmbh Deutschland Auftragsdüse für viskose Klebstoffe
WO2011012221A1 (fr) 2009-07-25 2011-02-03 Bona Gmbh Deutschland Buse d’application pour colles visqueuses

Also Published As

Publication number Publication date
JPH07106331B2 (ja) 1995-11-15
EP0254969A1 (fr) 1988-02-03
JPS6339660A (ja) 1988-02-20
DE8705030U1 (fr) 1987-06-04
DE3763150D1 (de) 1990-07-19
US4840293A (en) 1989-06-20

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