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EP0254969A1 - Apparatus for extruding pastes - Google Patents

Apparatus for extruding pastes Download PDF

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Publication number
EP0254969A1
EP0254969A1 EP87110251A EP87110251A EP0254969A1 EP 0254969 A1 EP0254969 A1 EP 0254969A1 EP 87110251 A EP87110251 A EP 87110251A EP 87110251 A EP87110251 A EP 87110251A EP 0254969 A1 EP0254969 A1 EP 0254969A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
pressure piece
tubular bag
discharge
spring
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
EP87110251A
Other languages
German (de)
French (fr)
Other versions
EP0254969B1 (en
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/en
Application filed by Ara Werk Kraemer GmbH and Co filed Critical Ara Werk Kraemer GmbH and Co
Priority to AT87110251T priority Critical patent/ATE53515T1/en
Publication of EP0254969A1 publication Critical patent/EP0254969A1/en
Application granted granted Critical
Publication of EP0254969B1 publication Critical patent/EP0254969B1/en
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 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 direction of discharge, 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.
  • 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.
  • 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 emerge in an uncontrolled manner.
  • 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 referred to as the "return spring” because of the effect it exerts on the pressure piece after completion or during an interruption of the discharge process, is preferably provided on the discharge-side end face of the pressure piece. In principle, however, it would also be possible to provide a correspondingly designed spring on the circumference of the pressure piece or on its end face facing away from the tubular bag.
  • the arrangement of the pressure relief spring on the discharge end of the pressure piece is preferred, however it can be used to easily prevent pinching of the tubular bag between the pressure piece and the cylinder inner wall.
  • the pressure relief spring is provided on the discharge-side end face of the pressure piece, it is preferably flat and designed such that it can be brought into contact with the piston-side end of the tubular bag, it preferably being provided with radial spring tabs.
  • the pressure relief spring can be strip-shaped or star-shaped.
  • the pressure piece on its side facing the tubular bag has a spring washer provided with spring tabs delimited by radial slots, the outer diameter of which, before the pressure piece is inserted into the cylinder, is larger than the inner diameter of the cylinder, with the result that the spring tabs 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 preferably with the pressure piece via a central, axial running screw, preferably screwed with the interposition of a washer.
  • It can be made of a resilient plastic, preferably polyethylene. Compared to rubber, which would cause the pressure piece to brake, 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 for sealing the pressure piece with respect to the inner wall of the cylinder, the outer diameter of which is preferably larger than the inner diameter of the cylinder before being inserted 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 compressed air, whereby the friction is kept 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 around the pressure piece circumference in at least one, preferably two levels 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 at its discharge end a detachably connected, preferably screwable, cover with a central opening, which merges into a discharge nozzle or nozzle that can be screwed to 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 above-mentioned 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 cover is preferably formed in two parts, one cover part being formed by a union nut and the other cover 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.
  • Such a two-part cover design has the advantage that the cylinder can be opened without rotating the attachment and, for example, if the color of the tubular bag is changed at any time, i.e. before it is finally emptied, together with the attachment 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 attachment 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 be loaded with a tubular bag 6 containing a pasty mass.
  • 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 a arranged in the handle l, via a lever 9 actuatable, adjustable compressed air valve l0 with the bottom 4 of the cylinder 2.
  • a compressed air line 11 leading to the lower end of the handle l leads to the compressed air valve l0.
  • a pressure relief valve is arranged in the cylinder base 4, which relieves the excess pressure in the cylinder when the compressed air supply is interrupted.
  • the end face of the essentially piston-shaped pressure piece 7 facing the screw cap 3 is concave and, with the interposition of a washer l2, is screwed to a spring washer l3 made of an elastic plastic via a central screw l4.
  • the spring washer l3 (see FIG. 3) is circular in plan view and is provided with twelve radially extending slots l5, which subdivide its edge area into twelve radially extending spring tabs l6.
  • the diameter of the spring washer l3, after it has been screwed to the pressure piece 7, is approximately 10% larger than the inside diameter of the cylinder 2.
  • the end face of the pressure piece 7 facing away from the screw cap 3 is provided with an elastic, preferably resilient sleeve seal l7, 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 l5 are compressed slightly and pressed into the cavity of the pressure piece 7 (cf. FIG. 4). After completion of the discharge process, they are supported against the inner wall of the cylinder 2 and also against the folded and solidified outer region 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 to emerge through the spout 5.
  • the fact that the spring tabs slide obliquely forward in the direction of discharge under pretension on the cylinder wall also prevents pinching of the tubular bag wall on the pressure piece, as is the case with known pressure pieces with two opposite sleeve seals.
  • the pressure piece 7 ⁇ also bears on its end face pointing to the left in the drawing, a spring washer l3 with radially extending slots l5 and spring tabs l6 running radially between them.
  • the pressure piece 7 ⁇ shown in FIG. 6 is slightly smaller in diameter 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 all-round grooves 19, 20 and on the outer edge of the two end faces with four guide cams 2l each. In the groove 20 further away from the spring star l3, 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 lid 24 shown in Fig. 7 has a screwed to a discharge nozzle 25 extension 26 and a nut 27 on.
  • 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)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Coating Apparatus (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung zum strangförmigen Austragen von pastösen, in verformbaren Schlauchbeuteln (6) enthaltenen Massen, mit einem Schlauchbeutel (6) beladbaren Zylinder (2), dessen in Austragrichtung weisende Stirnseite eine mit dem Tüllenanschluß des Schlauchbeutels (6) fluchtende zentrale Durchbrechung aufweist, einem im Zylinder (2) axial gegen den Schlauchbeutel (6) verschiebbaren, im wesentlichen kolbenförmigen Druckstück (7) und einer Einrichtung zur axialen Verschiebung des Druckstückes (7). Um zu vermeiden, daß nach Beendigung und nach jeder Unterbrechung des Austragvorganges noch ein kleiner Rest Material aus der Tülle austritt, weist das Druckstück (7) eine sich an der Wandung des Zylinders (2) abstützende und mit dieser zusammenwirkende Druckentlastungsfeder (13) auf.The invention relates to a device for the extrusion of pasty masses contained in deformable tubular bags (6) with a tubular bag (6) which can be loaded with a cylinder (2), the end face of which, in the direction of discharge, has a central opening aligned with the spout connection of the tubular bag (6) , an essentially piston-shaped pressure piece (7) which can be displaced axially against the tubular bag (6) in the cylinder (2) and a device for the axial displacement of the pressure piece (7). In order to avoid that after the termination and after each interruption of the discharge process, a small remnant of material emerges from the spout, the pressure piece (7) has a pressure relief spring (13) which is supported on the wall of the cylinder (2) and cooperates with it.

Description

Die Erfindung betrifft eine Vorrichtung zum strangförmigen Austragen von pastösen, in verformbaren Schlauchbeuteln ent­haltenen Massen, mit einem mit einem Schlauchbeutel beladba­ren Zylinder, dessen in Austragrichtung weisende Stirnseite eine mit dem Tüllenanschluß des Schlauchbeutels fluchtende zentrale Durchbrechung bzw. Auslaßöffnung aufweist, einem im Zylinder axial gegen den Schlauchbeutel verschiebbaren, im wesentlichen kolbenförmigen Druckstück und einer Einrichtung zur axialen Verschiebung des Druckstückes.The invention relates to a device for 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 direction of discharge, 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.

Beim Einsatz einer solchen, in aller Regel pistolenartig ausgebildeten Vorrichtung, ergibt sich immer wieder, daß nach der Beendigung und jeder Unterbrechung des Austragvor­ganges noch ein kleiner Rest aus der Tülle austritt. Dieses unkontrollierte Austreten von Schlauchbeutelinhalt hat zur Folge, daß das Arbeitsgerät vor jedem Einsatz und nach jeder Unterbrechung jeweils stirnseitig gesäubert werden muß, was zeitraubend ist und zu unnötigem, kostenverursachendem Ver­lust an Schlauchbeutelinhalt führt.When using such a device, usually a pistol-like device, it always appears that after the termination and each interruption of the discharge process, a small remnant emerges from the spout. This uncontrolled leakage of tubular bag content has the consequence that the implement before each use and after each Interruption must be cleaned on the end face, which is time-consuming and leads to unnecessary, cost-causing loss of tubular bag contents.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs beschriebenen Art dahingehend zu verbessern, daß sich mit ihr ohne Inkaufnahme des vorerwähnten unkon­trollierten Austretens von Schlauchbeutelinhalt arbeiten läßt.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.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung der eingangs beschriebenen Art gelöst, bei der das Druck­stück eine sich an der Zylinderwandung abstützende und mit dieser zusammenwirkende Druckentlastungsfeder aufweist. Die­se Feder bewirkt, daß das Druckstück nach dessen Druckent­lastung, d.h. bei Beendigung oder während einer Unterbre­chung des Austragvorganges nicht in der jeweiligen Arbeits­stellung verbleibt, sondern um einen vom Federweg abhängigen Betrag zurückbewegt wird, wodurch auch der Schlauchbeutelin­halt drucklos wird und die Masse keine Veranlassung hat, unkontrolliert auszutreten. Das freie Ende der Druckentla­stungsfeder ist entlang der Zylinderinnenwand unter Reibung verschiebbar.This object is achieved according to the invention by a device of the type described in the introduction, in which 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 emerge in an uncontrolled manner. The free end of the pressure relief spring can be moved along the inner wall of the cylinder with friction.

Die Druckentlastungsfeder, die wegen der Wirkung, die sie nach Beendigung oder während einer Unterbrechung des Aus­tragvorganges auf das Druckstück ausübt, auch als "Rück­stellfeder" bezeichnet werden könnte, ist vorzugsweise an der austragseitigen Stirnseite des Druckstückes vorgesehen. Grundsätzlich wäre es jedoch auch möglich, am Umfang des Druckstückes oder an dessen vom Schlauchbeutel abgewandten Stirnseite eine entsprechend ausgebildete Feder vorzusehen. Die Anordnung der Druckentlastungsfeder an der austragseiti­gen Stirnseite des Druckstückes ist jedoch vorzuziehen, da sich durch sie ein Einklemmen des Schlauchbeutels zwischen dem Druckstück und der Zylinderinnenwand problemlos verhin­dern läßt.The pressure relief spring, which could also be referred to as the "return spring" because of the effect it exerts on the pressure piece after completion or during an interruption of the discharge process, is preferably provided on the discharge-side end face of the pressure piece. In principle, however, it would also be possible to provide a correspondingly designed spring on the circumference of the pressure piece or on its end face facing away from the tubular bag. The arrangement of the pressure relief spring on the discharge end of the pressure piece is preferred, however it can be used to easily prevent pinching of the tubular bag between the pressure piece and the cylinder inner wall.

Ist die Druckentlastungsfeder an der austragseitigen Stirn­seite des Druckstückes vorgesehen, so ist sie vorzugsweise flächig und so ausgebildet, daß sie an das kolbenseitige Ende des Schlauchbeutels zur Anlage bringbar ist, wobei sie vorzugsweise mit radialen Federlappen versehen ist. So kann die Druckentlastungsfeder beispielsweise streifenförmig oder sternförmig ausgebildet sein.If the pressure relief spring is provided on the discharge-side end face of the pressure piece, it is preferably flat and designed such that it can be brought into contact with the piston-side end of the tubular bag, it preferably being provided with radial spring tabs. For example, the pressure relief spring can be strip-shaped or star-shaped.

Bei einer bevorzugten Ausführungsform trägt das Druckstück auf seiner zum Schlauchbeutel hinweisenden Seite eine mit von radialen Schlitzen begrenzten Federlappen versehene Fe­derscheibe, deren Außendurchmesser vor dem Einsetzen des Druckstückes in den Zylinder größer als der Innendurchmesser des Zylinders ist, mit der Folge, daß sich die Federlappen nach dem Einsetzen des Druckstückes federnd gegen die Zylin­derinnenwand abstützen.In a preferred embodiment, the pressure piece on its side facing the tubular bag has a spring washer provided with spring tabs delimited by radial slots, the outer diameter of which, before the pressure piece is inserted into the cylinder, is larger than the inner diameter of the cylinder, with the result that the spring tabs follow support the insertion of the pressure piece against the inner wall of the cylinder.

Die Länge der Feder bzw. der Außendurchmesser der vorerwähn­ten Federscheibe ist vorzugsweise 8 - l2 % größer als der Innendurchmesser des Zylinders. Die Randbereiche der Feder­scheibe sind vorzugsweise vom Druckstück weg gerichtet, ver­laufen also in Richtung auf den Schlauchbeutel.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.

Das Druckstück kann auf seiner in Austragrichtung, also zum Schlauchbeutel hin weisenden Seite konkav ausgebildet sein. Dabei ist der Radius der dadurch gebildeten Aushöhlung vor­zugsweise kleiner als der Radius der eingespannten, jedoch in Druckrichtung unbelasteten Feder.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.

Die Druckentlastungsfeder ist vorzugsweise zumindest im Be­reich ihrer Federlappen vom Druckstück federnd abhebbar und mit dem Druckstück vorzugsweise über eine zentrale, axial verlaufende Schraube, vorzugsweise unter Zwischenlage einer Beilegscheibe verschraubt. Sie kann aus einem federelasti­schen Kunststoff, vorzugsweise Polyäthylen gefertigt sein. Gegenüber Gummi, der eine Bremsung des Druckstückes verursa­chen würde, bietet ein federelastischer Kunststoff den Vor­teil, daß es nur minimale Reibungskräfte hervorruft, so daß stets mit einem dem Arbeitsdruck im wesentlichen entspre­chenden Anpreßdruck gearbeitet werden kann.The pressure relief spring can preferably be lifted off the pressure piece at least in the area of its spring tabs and preferably with the pressure piece via a central, axial running screw, preferably screwed with the interposition of a washer. It can be made of a resilient plastic, preferably polyethylene. Compared to rubber, which would cause the pressure piece to brake, 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.

Ist eine pneumatisch arbeitende Einrichtung zur axialen Ver­schiebung des Druckstückes vorgesehen, so kann zur Abdich­tung des Druckstückes gegenüber der Zylinderinnenwand eine elastische Dichtung vorgesehen sein, deren Außendurchmesser vor dem Einsetzen in den Zylinder vorzugsweise größer als der Innendurchmesser des Zylinders ist. Bei einer Ausfüh­rungsform ist diese Dichtung als Manschettendichtung ausge­bildet und auf der vom Schlauchbeutel abgewandten Stirnseite des Druckstückes angeordnet.If a pneumatically operating device is provided for the axial displacement of the pressure piece, an elastic seal can be provided for sealing the pressure piece with respect to the inner wall of the cylinder, the outer diameter of which is preferably larger than the inner diameter of the cylinder before being inserted into the cylinder. In one embodiment, 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.

Das vorzugsweise aus Kunststoff bestehende Druckstück kann eine oder mehrere umlaufende Nuten aufweisen. Das Druckstück wird hierdurch leichter und läßt sich leichter verschieben. In einer solchen, insbesondere im Mittelbereich umlaufenden Nut ist bei einer bevorzugten Ausführungsform ein elasti­scher, radial gegen die Innenwand des Zylinders wirkender Dichtring angeordnet. Ist eine pneumatisch arbeitende Ein­richtung zur axialen Verschiebung des Druckstückes vorgese­hen, so kann dieser Dichtring eine unter Druckluftbeauf­schlagung aufweitbare Dichtlippe aufweisen, so daß das Druckstück problemlos in den Zylinder eingesetzt werden kann und dennoch während des Arbeitsvorganges eine optimale Rund­um-Abdichtung gewährleistet ist. Der Dichtring ist vorzugs­weise als Profilring ausgebildet, der eine von der Druck­luftbeaufschlagung im wesentlichen unabhängige geringe Be­rührungsfläche mit der Innenwand des Zylinders aufweist, wodurch die Reibung klein gehalten wird.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. In a preferred embodiment, 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 compressed air, whereby the friction is kept small.

Um eine Verkantung des Druckstückes innerhalb des Zylinders zu verhindern, kann das Druckstück in seinem Außendurchmes­ser im wesentlichen dem Innendurchmesser des Zylinders ange­paßt sein. Eine Verkantung des Druckstückes innerhalb des Zylinders kann mit besonderem Vorteil durch im Druckstück vorgesehene Führungsnocken verhindert werden, die in minde­stens einer, vorzugsweise zwei Ebenen gleichmäßig um den Druckstück-Umfang verteilt angeordnet sind und eine sichere und reibungsarme Führung des Druckstückes innerhalb des Zy­linders gewährleisten. Die beiden Ebenen sind vorzugsweise beidseitig vom Dichtungsring vorgesehen.In order to prevent the pressure piece from tilting within the cylinder, 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 around the pressure piece circumference in at least one, preferably two levels 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.

Der Zylinder der erfindungsgemäßen Vorrichtung kann an sei­nem Austragende einen mit ihm lösbar verbundenen, vorzugs­weise verschraubbaren Deckel mit einer zentralen Durchbre chung aufweisen, die in eine mit dem Deckel verschraubbaren Austragtülle bzw. -düse übergeht. Auf seiner Innenseite weist dieser Deckel vorzugsweise eine plane Anlagefläche für den Schlauchbeutel auf, in deren Zentrum vorzugsweise eine der Aufnahme des Randes des aufgeschnittenen Beutels dienen­de Vertiefung vorgesehen ist, die vorzugsweise konisch in die zentrale Durchbrechung bzw. Auslaßöffnung übergeht. Die plane Anlagefläche bietet dabei der Vorteil, daß der Schlauchbeutel unter der Wirkung des auf ihn einwirkenden Druckstückes praktisch vollständig geleert werden kann. Der vorerwähnte Deckel kann einen äußeren, im wesentlichen zy­lindrischen Ansatz zur Verschraubung der Austragdüse aufwei­sen, wobei dieser Ansatz vorzugsweise ein Außengewinde auf­weist, insbesondere derart, daß herkömmliche Kartuschendüsen mit ihm verschraubt werden können. Die Auslaßöffnung im An­satz ist vorzugsweise im Innendurchmesser so bemessen, daß sie im wesentlichen der Auslaßöffnung herkömmlicher Kartu­schen entspricht. Dadurch können gleiche Verhältnisse wie bei der Verarbeitung von Kartuschen erreicht werden.The cylinder of the device according to the invention can have at its discharge end a detachably connected, preferably screwable, cover with a central opening, which merges into a discharge nozzle or nozzle that can be screwed to the cover. 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 above-mentioned 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.

Der vorerwähnte Deckel ist vorzugsweise zweiteilig ausgebil­det, wobei ein Deckelteil von einer Überwurfmutter und das andere Deckelteil von einem Ansatzstück gebildet ist, das die vorerwähnte ebene Anlagefläche für den Schlauchbeutel und vorzugsweise die der Aufnahme des Randes des aufge­schnittenen Beutels dienende Vertiefung aufweist. Eine sol­che zweiteilige Deckelausführung bietet den Vorteil, daß der Zylinder ohne Drehung des Ansatzstückes geöffnet und bei­spielsweise bei einem erforderlichen Farbwechsel der Schlauchbeutel jederzeit, also auch vor seiner endgültigen Entleerung, zusammen mit der ihm im Deckel zugeordneten An­satzstück und der mit dieser verbundenen Austragdüse gegen einen anderen Schlauchbeutel mit anderem Ansatzstück ausge­tauscht werden kann. Das vorerwähnte Ansatzstück ist vor­zugsweise so bemessen, daß es mindestens teilweise stirnsei­tig in das Innere des Zylinders einführbar ist. Zwischen den beiden Deckelteilen, also zwischen der Überwurfmutter und dem Ansatzstück, kann eine Rastverbindung vorgesehen sein, die ein unbeabsichtigtes axiales Lösen beider Deckelteile voneinander verhindert.The above-mentioned cover is preferably formed in two parts, one cover part being formed by a union nut and the other cover 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. Such a two-part cover design has the advantage that the cylinder can be opened without rotating the attachment and, for example, if the color of the tubular bag is changed at any time, i.e. before it is finally emptied, together with the attachment 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 attachment 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.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung, die für sich alleine oder zu mehreren in Kombination bei einer Ausführungsform der Erfindung verwirklicht sein kön­nen, ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung einer bevorzugten Ausführungsform der Erfindung im Zusammenhang mit der Zeichnung.Further details, features and advantages of the invention, which can be realized individually or in combination in one embodiment of the invention, result from the claims and the following description of a preferred embodiment of the invention in connection with the drawing.

In der Zeichnung zeigen jeweils schematisch:

  • Fig. l eine teilweise geschnittene Seitenansicht einer erfindungsgemäßen Vorrichtung,
  • Fig. 2 eine vergrößerte Seitenansicht des Druck­stückes der Vorrichtung gemäß Fig. l,
  • Fig. 3 eine Ansicht des in Fig. 2 dargestellten Druckstückes in Richtung des Pfeiles III,
  • Fig. 4 die Stellung des Druckstückes der in Fig. l dargestellten Vorrichtung während des Aus­tragvorganges,
  • Fig. 5 die Stellung des Druckstückes der in Fig. l dargestellten Vorrichtung nach Beendigung des Austragvorganges,
  • Fig. 6 eine teilweise geschnittene vergrößerte Sei­tenansicht einer anderen Ausführungsform des Druckstückes der Vorrichtung gemäß Fig. l, und
  • Fig. 7 einen Schraubdeckel mit Austragtülle bzw. -düse.
The drawings each show schematically:
  • 1 is a partially sectioned side view of a device according to the invention,
  • 2 is an enlarged side view of the pressure piece of the device according to FIG. 1,
  • 3 is a view of the pressure piece shown in Fig. 2 in the direction of arrow III,
  • 4 shows the position of the pressure piece of the device shown in FIG. 1 during the discharge process,
  • 5 shows the position of the pressure piece of the device shown in FIG. 1 after the discharge process has ended,
  • Fig. 6 is a partially sectioned enlarged side view of another embodiment of the pressure piece of the device according to FIG. 1, and
  • Fig. 7 shows a screw cap with discharge nozzle or nozzle.

Die in Fig. l dargestellte Vorrichtung ist pistolenartig ausgebildet. Sie weist einen Handgriff l und einen von die­sem getragenen Zylinder 2 auf. Der Zylinder 2 ist an seinem in der Zeichnung links dargestellten Ende mit einem Schraub­deckel 3 und an seinem anderen Ende mit einem Boden 4 verse­hen. Der Schraubdeckel 3 besitzt eine zentrale Durchbre­chung, die in eine Austragtülle bzw. -düse 5 übergeht. Nach dem Abschrauben des Deckels 3 kann der Zylinder 2 mit einem eine pastöse Masse enthaltenden Schlauchbeutel 6 beladen werden. Im Inneren des Zylinders 2 ist ein Druckstück 7 dicht geführt, das von der dem Schraubdeckel 3 abgewandten Seite her mit Druckluft beaufschlagbar ist, die dem Zylinder 2 über eine Leitung 8 zugeführt werden kann. Diese Leitung 8 verbindet ein im Handgriff l angeordnetes, über einen Hebel 9 betätigbares, einstellbares Druckluftventil l0 mit dem Boden 4 des Zylinders 2. Zum Druckluftventil l0 führt eine unten im Handgriff l mündende Druckluftleitung ll. Im Zylin­derboden 4 ist ein Druckentlastungsventil angeordnet, das den Überdruck im Zylinder abbaut, wenn die Druckluftzufuhr unterbrochen wird.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. After unscrewing the cover 3, the cylinder 2 can be loaded with a tubular bag 6 containing a pasty mass. In the interior of the cylinder 2, 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 a arranged in the handle l, via a lever 9 actuatable, adjustable compressed air valve l0 with the bottom 4 of the cylinder 2. A compressed air line 11 leading to the lower end of the handle l leads to the compressed air valve l0. A pressure relief valve is arranged in the cylinder base 4, which relieves the excess pressure in the cylinder when the compressed air supply is interrupted.

Die zum Schraubdeckel 3 weisende Stirnseite des im wesentli­chen kolbenförmigen Druckstückes 7 ist konkav ausgebildet und unter Zwischenlage einer Beilegscheibe l2 über eine zen­trale Schraube l4 mit einer aus einem elastischen Kunststoff gefertigten Federscheibe l3 verschraubt. Die Federscheibe l3 ist (vgl. Fig. 3) in Draufsicht kreisförmig ausgebildet und mit zwölf radial verlaufenden Schlitzen l5 versehen, die ihren Randbereich in zwölf radial verlaufende Federlappen l6 unterteilen. Der Durchmesser der Federscheibe l3 ist nach deren Verschraubung mit dem Druckstück 7 um ca. l0 % größer als der Innendurchmesser des Zylinders 2.The end face of the essentially piston-shaped pressure piece 7 facing the screw cap 3 is concave and, with the interposition of a washer l2, is screwed to a spring washer l3 made of an elastic plastic via a central screw l4. The spring washer l3 (see FIG. 3) is circular in plan view and is provided with twelve radially extending slots l5, which subdivide its edge area into twelve radially extending spring tabs l6. The diameter of the spring washer l3, after it has been screwed to the pressure piece 7, is approximately 10% larger than the inside diameter of the cylinder 2.

Die vom Schraubdeckel 3 abgewandte Stirnseite des Druck­stückes 7 ist mit einer elastischen, vorzugsweise federnd ausgebildeten Manschettendichtung l7 versehen, deren Außen­durchmesser vor dem Einsetzen in den Zylinder 2 größer als dessen Innendurchmesser ist, so daß sie eine dichte Führung des Druckstückes 7 im Zylinder 2 gewährleistet.The end face of the pressure piece 7 facing away from the screw cap 3 is provided with an elastic, preferably resilient sleeve seal l7, 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.

Während des Austragvorganges werden die Federlappen l5 etwas gestaucht und in die Höhlung des Druckstückes 7 gedrückt (vgl. Fig. 4). Nach Beendigung des Austragvorganges stützen sie sich gegen die Innenwand des Zylinders 2 und auch gegen den gefalteten und verfestigten Außenbereich des Schlauch beutels ab und drücken das jetzt nicht mehr mit Druckluft beaufschlagte Druckstück 7 um den Betrag s in Richtung auf den Boden 4 des Zylinders 2 (vgl. Fig. 5). Letzteres hat zur Folge, daß der Inhalt des Schlauchbeutels 6 nicht mehr unter Druck steht und deshalb auch keine Veranlassung mehr hat, über die Tülle 5 auszutreten. Dadurch, daß die Federlappen schräg nach vorn in Austragrichtung unter Vorspannung an der Zylinderwand gleiten wird außerdem ein Einklemmen der Schlauchbeutelwandung am Druckstück vermieden, wie es bei bekannten Druckstücken mit zwei gegenüberliegenden Manschet­tendichtungen der Fall ist.During the discharge process, the spring tabs l5 are compressed slightly and pressed into the cavity of the pressure piece 7 (cf. FIG. 4). After completion of the discharge process, they are supported against the inner wall of the cylinder 2 and also against the folded and solidified outer region 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 to emerge through the spout 5. The fact that the spring tabs slide obliquely forward in the direction of discharge under pretension on the cylinder wall also prevents pinching of the tubular bag wall on the pressure piece, as is the case with known pressure pieces with two opposite sleeve seals.

Das in Fig. 6 teilweise geschnittene Druckstück 7ʹ trägt auf seiner in der Zeichnung nach links weisenden Stirnseite ebenfalls eine Federscheibe l3 mit radial verlaufenden Schlitzen l5 und zwischen diesen radial verlaufende Feder­lappen l6. Das in Fig. 6 dargestellte Druckstück 7ʹ ist im Durchmesser etwas kleiner als das in Fig. 2 dargestellte Druckstück 7. Im Gegensatz zu diesem weist es keine zylind­rische Mantelfläche auf. Es ist vielmehr mit zwei rundum laufenden Nuten l9, 20 und am Außenrand der beiden Stirnsei­ten mit je vier Führungsnocken 2l versehen. In der vom Fe­derstern l3 weiter entfernten Nut 20 ist ein profilierter Dichtring 22 angeordnet, der eine unter Druckluftbeaufschla­gung aufweitbare Dichtlippe 23 mit einer schmalen, umlaufen­den Dichtkante aufweist.The pressure piece 7ʹ, partially cut in FIG. 6, also bears on its end face pointing to the left in the drawing, a spring washer l3 with radially extending slots l5 and spring tabs l6 running radially between them. The pressure piece 7ʹ shown in FIG. 6 is slightly smaller in diameter 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 all-round grooves 19, 20 and on the outer edge of the two end faces with four guide cams 2l each. In the groove 20 further away from the spring star l3, 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.

Der in Fig. 7 dargestellte Deckel 24 weist ein mit einer Austragdüse 25 verschraubtes Ansatzstück 26 und eine Über wurfmutter 27 auf. Das Ansatzstück 26 weist auf seiner von der Austragdüse 25 abgewandten Seite eine plane Schlauchbeu­tel-Anlagefläche 28 und auf der anderen Seite einen zweistu-­figen Ansatz 29 auf, der mit dem die Austragdüse 25 ver­schraubt ist. Im Zentrum der Anlagefläche 28 ist eine der Aufnahme des Randes eines aufgeschnittenen Beutels dienende Vertiefung 30 vorgesehen, die ihre Fortsetzung in eine zen­tralen Durchbrechung des Ansatzes 29 findet und damit mit der Austragdüse 25 komuniziert.The lid 24 shown in Fig. 7 has a screwed to a discharge nozzle 25 extension 26 and a nut 27 on. 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. Provided in the center of the contact surface 28 is 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.

Claims (14)

1. Vorrichtung zum strangförmigen Austragen von pastösen, in verformbaren Schlauchbeuteln enthaltenen Massen, mit einem mit einem Schlauchbeutel beladbaren Zylinder, des­sen in Austragrichtung weisende Stirnseite eine mit dem Tüllenanschluß des Schlauchbeutels fluchtende zentrale Durchbrechung aufweist, einem im Zylinder axial gegen den Schlauchbeutel verschiebbaren, im wesentlichen kol­benförmigen Druckstück und einer Einrichtung zur axialen Verschiebung des Druckstückes, dadurch gekennzeichnet, daß das Druckstück (7) eine sich an der Wandung des Zy­linders (2) abstützende und mit dieser zusammenwirkende Druckentlastungsfeder (l3) aufweist.1. 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 direction of discharge, has a central opening aligned with the spout connection of the tubular bag, essentially a cylinder which can be displaced axially against the tubular bag Piston-shaped pressure piece and a device for the axial displacement of the pressure piece, characterized in that the pressure piece (7) has a pressure relief spring (l3) which is supported on the wall of the cylinder (2) and interacts with it. 2. Vorrichtung nach Anspruch l, dadurch gekennzeichnet, daß die Druckentlastungsfeder (l3) an der austragseitigen Stirnseite des Druckstückes (7) vorgesehen ist und vorzugs­ weise flächig ausgebildet und an dem kolbenseitigen Ende des Schlauchbeutels (6) zur Anlage bringbar ist.2. Device according to claim l, characterized in that the pressure relief spring (l3) is provided on the discharge-side end of the pressure piece (7) and preferred as flat and can be brought to bear on the piston-side end of the tubular bag (6). 3. Vorrichtung nach Anspruch l oder 2, dadurch gekennzeichnet, daß die Druckentlastungsfeder (l3) radiale Federlappen (l6) aufweist, insbesondere das Druckstück (7) auf seiner zum Schlauchbeutel (6) hin weisende Seite eine mit von radialen Schlitzen (l5) begrenzten Federlappen (l6) versehene Feder­scheibe (l3) trägt, deren Außendurchmesser vor dem Einsetzen des Druckstückes (7) in den Zylinder (2) größer als der Innen­durchmesser des Zylinders (2) ist, wobei die Randbereiche der Federscheibe (l3) vorzugsweise vom Druckstück (7) weg gerichtet sind.3. Apparatus according to claim l or 2, characterized in that the pressure relief spring (l3) has radial spring tabs (l6), in particular the pressure piece (7) on its side facing the tubular bag (6) facing one with radial slots (l5) Spring lobe (l6) provided spring washer (l3) whose outer diameter before inserting the pressure piece (7) into the cylinder (2) is larger than the inner diameter of the cylinder (2), the edge regions of the spring washer (l3) preferably from the pressure piece ( 7) are directed away. 4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Außendurchmesser der als Federscheibe (l3) ausgebildeten Druckentlastungsfeder vor dem Einsetzen des Druckstückes (7) in den Zylinder (2) 8 - l2 % größer als der Innendurchmesser des Zylinders (2) ist.4. Device according to one of the preceding claims, characterized in that the outer diameter of the pressure relief spring designed as a spring washer (l3) before inserting the pressure piece (7) in the cylinder (2) 8 - l2% larger than the inner diameter of the cylinder (2) is. 5. Vorrichtung nach einem der Ansprüche 3 oder 4, dadurch ge­kennzeichnet, daß die Druckentlastungsfeder (l3) im axial unbelasteten Zustand mindestens im Randbereich der Feder­lappen (l6) vom Druckstück (7) abgehoben ist.5. Device according to one of claims 3 or 4, characterized in that the pressure relief spring (l3) is lifted off in the axially unloaded state at least in the edge region of the spring tab (l6) from the pressure piece (7). 6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Druckstück (7) auf seiner in Aus­tragrichtung weisenden Seite konkav ausgebildet ist, ins­besondere die Druckentlastungsfeder (l3) mit dem Druck­stück (7) über eine zentrale, axial verlaufende Schraube (l4), vorzugsweise unter Zwischenlage einer Begleitscheibe (l2) verschraubt ist.6. Device according to one of the preceding claims, characterized in that the pressure piece (7) is concave on its side pointing in the discharge direction, in particular the pressure relief spring (l3) with the pressure piece (7) via a central, axially extending screw (l4) , preferably screwed with an intermediate washer (l2). 7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Druckentlastungsfeder (l3) aus einem federelastischen Kunststoff, vorzugsweise Polyäthylen besteht.7. Device according to one of the preceding claims, characterized in that the pressure relief spring (l3) consists of a resilient plastic, preferably polyethylene. 8. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Druckstück (7) mit einer elastischen Dichtung (l7) versehen ist, die zwischen Druckstück und Innenwand des Zylinders (2) zumindest bei Druckluftbeaufschlagung auf der vom Schlauchbeutel (6) abgewandten Seite abdichtet und deren Außendurchmesser vor dem Einsetzen in den Zylinder (2) vorzugsweise grö­ßer als der Innendurchmesser des Zylinders (2) ist, wobei das Druckstück (7) vorzugsweise wenigstens eine umlaufende Nut (l9, 20) aufweist, in der ein elastischer, radial gegen die Innenwand des Zylinders (2) wirkender Dichtring (22) angeordnet ist.8. Device according to one of the preceding claims, characterized in that the pressure piece (7) is provided with an elastic seal (l7) between the pressure piece and the inner wall of the cylinder (2) at least when compressed air is applied to the side facing away from the tubular bag (6) seals and whose outer diameter before insertion into the cylinder (2) is preferably larger than the inner diameter of the cylinder (2), the pressure piece (7) preferably having at least one circumferential groove (19, 20) in which an elastic, radially counter the inner wall of the cylinder (2) acting sealing ring (22) is arranged. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Dichtring (22) eine unter Druckluftbeaufschlagung auf­weitbare Dichtlippe (23) aufweist, insbesondere der Dicht­ring (22) ein Profilring ist, dessen Berührungsfläche mit der Innenwand des Zylinders (2) im wesentlichen unabhängig von einer Druckluftbeaufschlagung ist.9. The device according to claim 8, characterized in that the sealing ring (22) has an expandable sealing lip under the action of compressed air (23), in particular the sealing ring (22) is a profile ring, the contact surface with the inner wall of the cylinder (2) substantially independent of of compressed air. l0. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Druckstück (7) zur Ver­hinderung seiner Verkantung in mindestens einer, vor­zugsweise zwei Ebenen, mindestens drei nach außen ra­gende Führungsnocken (2l) aufweist, wobei die Ebenen vorzugsweise auf beiden Seiten der elastischen Dichtung vorgesehen sind.l0. Device according to one of the preceding claims, characterized in that the pressure piece (7) has at least three outwardly projecting guide cams (2l) to prevent its canting in at least one, preferably two levels, the levels preferably being provided on both sides of the elastic seal are. 11. Vorrichtung zum strangförmigen Austragen von pastösen, in verformbaren Schlauchbeuteln enthaltenen Massen, mit einem mit einem Schlauchbeutel beladbaren Zylinder, des­sen in Austragrichtung weisende Stirnseite eine mit dem Tüllenanschluß des Schlauchbeutels fluchtende zentrale Durchbrechung aufweist, einem im Zylinder axial gegen den Schlauchbeutel verschiebbaren, im wesentlichen kolbenförmi­gen Druckstück und einer Einrichtung zur axialen Verschie­ bung des Druckstückes, bei der der Zylinder am Austrag­ende einen mit ihm lösbar verbundenen, vorzugsweise ver­schraubbaren Deckel mit zentraler Durchbrechung aufweist, die in eine mit dem Deckel verschraubbare Austragdüse übergeht, insbesondere nach einem der vorhergehenden An­sprüche, dadurch gekennzeichnet, daß der Deckel (24) auf seiner Innenseite eine plane Anlagefläche (28) für den Schlauchbeutel (6) aufweist.11. Device for the strand-like discharge of pasty masses contained in deformable tubular bags, with a cylinder that can be loaded with a tubular bag, the end face of which, in the direction of discharge, has a central opening that is flush with the spout connection of the tubular bag, essentially a cylinder that can be displaced axially against the tubular bag piston-shaped pressure piece and a device for axial displacement Exercise of the pressure piece, in which the cylinder at the discharge end has a detachably connected, preferably screwable cover with a central opening, which passes into a discharge nozzle which can be screwed to the cover, in particular according to one of the preceding claims, characterized in that the cover (24) has on its inside a flat contact surface (28) for the tubular bag (6). 12. Vorrichtung nach Anspruch ll, dadurch gekennzeichnet, daß im Zentrum der planen Anlagefläche (28) eine der Aufnahme des Randes des aufgeschnittenen Beutels (6) dienende ver­breiterte Vertiefung (30) vorgesehen ist, die vorzugsweise konisch in die Auslaßöffnung übergeht.12. The apparatus according to claim ll, characterized in that in the center of the flat contact surface (28) one of the receiving the edge of the cut bag (6) serving widened recess (30) is provided, which preferably merges conically into the outlet opening. 13. Vorrichtung nach einem der Ansprüche ll oder l2, dadurch gekennzeichnet, daß der Deckel (24) einen im wesentlichen zylindrischen Ansatz (29) zur Verschraubung der Austrag­düse (25) aufweist, der ein vorzugsweise ein für herkömmli­che Kartuschen-Düsen passendes Außengewinde aufweist, wobei vorzugsweise der Innendurchmesser der Auslaßöffnung (3l) im Ansatz (29) im wesentlichen dem von Auslaßöffnungen herkömmlichen Kartuschen entspricht.13. Device according to one of claims ll or l2, characterized in that the cover (24) has a substantially cylindrical projection (29) for screwing the discharge nozzle (25), which preferably has an external thread suitable for conventional cartridge nozzles, wherein preferably the inside diameter of the outlet opening (3l) in the projection (29) essentially corresponds to that of conventional cartridges of outlet openings. 14. Vorrichtung nach einem der Ansprüche ll bis l3, dadurch gekennzeichnet, daß der Deckel (24) zweiteilig ausgebildet ist, wobei ein Teil von einer Überwurfmutter (27) und das andere Teil von einem Düsenansatzstück (26) gebildet ist, das die ebene Anlagefläche (28) für den Schlauchbeutel (6) und vorzugsweise die der Aufnahme des Randes des auf­geschnittenen Beutels (6) dienende Vertiefung (30) auf­weist, wobei vorzugsweise das Düsenansatzstück (26) min­destens teilweise stirnseitig in das Innere des Zylinders (2) einführbar ist.14. Device according to one of claims ll to l3, characterized in that the cover (24) is formed in two parts, one part being formed by a union nut (27) and the other part being formed by a nozzle attachment piece (26) which forms the flat contact surface (28) for the tubular bag (6) and preferably the recess (30) which serves to receive the edge of the cut-open bag (6), the nozzle attachment piece (26) preferably being insertable at least partially on the front side into the interior of the cylinder (2).
EP87110251A 1986-07-30 1987-07-16 Apparatus for extruding pastes Expired - Lifetime EP0254969B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110251T ATE53515T1 (en) 1986-07-30 1987-07-16 DEVICE FOR THE STRIP-FORMIEN DISTRIBUTION OF PASTOES MASS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8620379U 1986-07-30
DE19868620379 DE8620379U1 (en) 1986-07-30 1986-07-30 Device for the strand-like discharge of pasty masses
DE8705030U 1987-04-04
DE8705030U DE8705030U1 (en) 1986-07-30 1987-04-04 Device for strand-shaped discharge of pasty masses

Publications (2)

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

Family

ID=25950992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110251A Expired - Lifetime EP0254969B1 (en) 1986-07-30 1987-07-16 Apparatus for extruding pastes

Country Status (4)

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

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DE8901554U1 (en) * 1989-02-10 1989-06-08 Ritter, Franz Peter, Ing.(grad.), 8933 Untermeitingen Foil cartridge ejection device
EP0380792A2 (en) * 1988-12-13 1990-08-08 Günther Dipl.-Ing. Knieriem Discharge device
DE3922958A1 (en) * 1988-12-13 1990-09-27 Knieriem Guenther Dipl Ing Fh EMPTYING DEVICE 3
US5301839A (en) * 1992-06-30 1994-04-12 Dow Corning Gmbh Sealant cartridge
EP2444163A1 (en) 2010-10-23 2012-04-25 Andreas Otto Nozzle
CN112459430A (en) * 2020-11-17 2021-03-09 胡坤红 Seam beautifying device

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US5211312A (en) * 1991-10-28 1993-05-18 Chang Peter J Y Caulk dispensing device with thumb-control lock
JP2772188B2 (en) * 1992-01-23 1998-07-02 武蔵エンジニアリング株式会社 Liquid dispenser syringe plunger
DE4208451A1 (en) * 1992-03-17 1993-09-23 Ara Werk Kraemer Gmbh & Co DISCHARGE DEVICE FOR PASTOESE MEASURES
US5301835A (en) * 1992-09-17 1994-04-12 Dow Corning Corporation Adapter for dispensing material from a sausage type package
US5323931A (en) * 1993-02-08 1994-06-28 Prince Castle Inc. Dispenser for extrudable material including dispensing from collapsible containers
US5622288A (en) * 1995-06-12 1997-04-22 Sonoco Products Company Cartridge plunger with surface cleaning skirt
US6334553B1 (en) * 2000-03-06 2002-01-01 Nordson Corporation Anti-float plunger for pneumatically actuated syringe
US6712245B2 (en) * 2002-07-15 2004-03-30 Arther Barrett Venting plunger for caulk cartridges
DE102005007055A1 (en) * 2005-02-15 2006-08-24 Kettenbach Gmbh & Co. Kg Dispenser for single or multi paste compounds especially for dental applications has elastic inserts between piston and piston disc
US8087550B2 (en) * 2006-04-07 2012-01-03 Albion Engineering Company Convertible device for dispensing material having parts that can be retained on the device
US8424727B2 (en) * 2008-05-05 2013-04-23 Meritool Llc Material dispensing assembly
DE102008063502A1 (en) * 2008-12-17 2010-06-24 Fischbach Kg Kunststoff-Technik extractor tool
DE102009034774A1 (en) 2009-07-25 2011-01-27 Bona Gmbh Deutschland Application nozzle for viscous adhesives
DE102009035037A1 (en) * 2009-07-28 2011-02-03 Otto, Andreas Piston with integrated expanding disc
CN103079493B (en) * 2010-05-28 2016-08-03 可乐丽则武齿科株式会社 Cartridge dispenser
JP4659128B1 (en) 2010-08-24 2011-03-30 加賀ワークス株式会社 Viscous material filling method
DE112011103764B4 (en) 2010-11-15 2015-04-02 Milwaukee Electric Tool Corp. Electrically powered dispensing tool
WO2012068092A2 (en) 2010-11-15 2012-05-24 Milwaukee Electric Tool Corporation Powered dispensing tool
US8783514B2 (en) * 2011-05-20 2014-07-22 Henkel US IP LLC Dispensing gun for a collapsible adhesive-filled container
US8857672B2 (en) 2011-06-20 2014-10-14 Milwaukee Electric Tool Corporation Carriage assembly for dispensing tool
US9039557B2 (en) 2011-09-02 2015-05-26 Milwaukee Electric Tool Corporation Powered dispensing tool
JP5101743B1 (en) 2012-04-02 2012-12-19 加賀ワークス株式会社 Plunger for pneumatic dispenser
JP5651803B1 (en) 2014-08-25 2015-01-14 加賀ワークス株式会社 Plunger for pneumatic dispenser
TWI576167B (en) * 2015-04-02 2017-04-01 翔宣富企業有限公司 Push member and caulking gun having the same
JP5993077B1 (en) 2015-10-19 2016-09-14 加賀ワークス株式会社 Viscous material dispenser cartridge
FR3081113B1 (en) * 2018-05-18 2020-05-29 Albea Le Treport PISTON FOR TANK OF A DISPENSER OF A FLUID PRODUCT WITHOUT AIR INTAKE
WO2020058884A1 (en) 2018-09-19 2020-03-26 Prc-Desoto International, Inc. Expandable plunger head assemblies for sealant dispensing guns
EP3632575A1 (en) * 2018-10-02 2020-04-08 Sulzer Mixpac AG Reusable cartridge piston
EP3714994A1 (en) * 2019-03-26 2020-09-30 Sulzer Mixpac AG Piston, cartridge, dispenser
CN116249653A (en) * 2020-10-13 2023-06-09 Prc-迪索托国际公司 Plunger for a sealant dispensing cartridge with collapsible sealant encapsulation

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DE3021522A1 (en) * 1980-06-07 1982-01-07 Schieferdecker Gmbh & Co Kg, 4006 Erkrath Spray gun with cartridge housed piston - has piston moving push rod, between which and piston crown is intermediate member with dia. increasing under pressure
DE3031938A1 (en) * 1980-08-25 1982-04-08 Hilti AG, 9494 Schaan DEVICE FOR DELIVERING ONE OR MULTI-COMPONENT DIMENSIONS
EP0081145A1 (en) * 1981-12-08 1983-06-15 Alfred Fischbach Kunststoffspritzgusswerk End closure for a hollow cylindrical extrusion pressure container

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Publication number Priority date Publication date Assignee Title
EP0380792A2 (en) * 1988-12-13 1990-08-08 Günther Dipl.-Ing. Knieriem Discharge device
DE3922958A1 (en) * 1988-12-13 1990-09-27 Knieriem Guenther Dipl Ing Fh EMPTYING DEVICE 3
EP0380792A3 (en) * 1988-12-13 1991-04-03 Günther Dipl.-Ing. Knieriem Discharge device
DE8901554U1 (en) * 1989-02-10 1989-06-08 Ritter, Franz Peter, Ing.(grad.), 8933 Untermeitingen Foil cartridge ejection device
US5301839A (en) * 1992-06-30 1994-04-12 Dow Corning Gmbh Sealant cartridge
EP2444163A1 (en) 2010-10-23 2012-04-25 Andreas Otto Nozzle
CN112459430A (en) * 2020-11-17 2021-03-09 胡坤红 Seam beautifying device

Also Published As

Publication number Publication date
EP0254969B1 (en) 1990-06-13
US4840293A (en) 1989-06-20
DE8705030U1 (en) 1987-06-04
JPH07106331B2 (en) 1995-11-15
DE3763150D1 (en) 1990-07-19
JPS6339660A (en) 1988-02-20

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