EP3311928A1 - Cartridge piston with venting valve - Google Patents

Cartridge piston with venting valve Download PDF

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Publication number
EP3311928A1
EP3311928A1 EP17001655.4A EP17001655A EP3311928A1 EP 3311928 A1 EP3311928 A1 EP 3311928A1 EP 17001655 A EP17001655 A EP 17001655A EP 3311928 A1 EP3311928 A1 EP 3311928A1
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EP
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Prior art keywords
wall
piston
annular
passage opening
central body
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EP17001655.4A
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German (de)
French (fr)
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EP3311928B1 (en
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Frank Ritter
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Ritter GmbH
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Ritter GmbH
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    • 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
    • B05C17/00579—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 comprising means for allowing entrapped air to escape to the atmosphere

Definitions

  • the invention relates to a cartridge piston with vent valve.
  • the invention is applicable to pasty mass-containing cartridges both in normal pistons and annular pistons, which can have only one chamber or two concentrically arranged chambers.
  • the vent valve is used to allow the insertion of the piston in the open rear end of the cartridge filled with the filler to escape the trapped between the piston front and the filler air, but at the same time to prevent also filling material or creeping oil-like constituents of the filling material escape through the vent valve can, or later that air through the vent valve can reach the filling material.
  • the latter presupposes that the venting valve remains tight even after the piston has been set, which in turn requires that the valve is not contaminated by particles of the filling compound.
  • a cartridge piston with bleeder valve is out of the EP 1 207 969 A1 known.
  • a valve member is inserted into a correspondingly adapted opening of the piston, which cooperates with the piston and together with it forms a valve.
  • the valve member has a central body which penetrates a through-hole of the piston and which has a conical portion which cooperates with a sealing edge formed on the piston at the piston-back end of the through-bore.
  • the central body is connected at its front, remote from the conical region end via a front wall portion with an approximately cylindrical wall body, which is immersed in a correspondingly shaped groove on the piston front side and is latched near the groove bottom with the radially outer groove wall.
  • the cylindrical wall body of the valve member forms with the radially outer groove wall of the piston groove a gap which allows the entry of air, and the latching is interrupted by a plurality of air passages through which air can pass and pass between the rear end of the cylindrical wall portion and the groove bottom ,
  • a filter channel is formed with narrow channels, which serves to trap through the air ducts of the latch passing filling material of the cartridge and creeping oil-like constituents and to prevent, to between the conical region of the central body and to reach the sealing lip of the piston formed valve.
  • the filter section follows the latching.
  • the central body is slightly above the piston back, so that when pressure is applied to the back of the piston, as it takes place when setting the piston, the central body is pressed slightly forward, and thereby a venting gap between the conical portion of the central body and the sealing edge on opens rear end of the piston passage opening through which venting air can escape.
  • the valve closes again because the front wall portion connecting the central body to the cylindrical wall body is designed to act as a spring biasing the central body in the rearward direction and cooperating with its conical portion presses with the sealing edge of the piston passage opening and so keeps the valve closed.
  • the object of the invention is therefore to provide a cartridge piston with a vent valve, the venting function is improved and offers greater security of the complete venting.
  • the vent no longer takes place via the latching of the cylindrical wall body in the piston, and the venting is no longer done via the annular gap between the cylindrical wall body and the radially outer groove wall. Rather, the cylindrical wall body is radially thickened and double-walled, wherein the two walls form a relatively large gap between them, the rear opens open and is closed on the front side.
  • small air passage openings are provided in the wall space of the wall body closing the gap on the front side, through which air to be deaerated can enter into the space between the two walls of the cylindrical wall body.
  • a filter section is formed with fine channels, which can intercept about entering through the air passage openings material.
  • the accompanying drawing shows in axial section a piston with vent valve according to the invention.
  • a valve member 2 is inserted into a corresponding recess of the piston from the front side thereof.
  • the recess of the piston 1, which serves to receive the valve member 2, consists of a through-hole 11 and an annular groove 12 concentrically surrounding it.
  • the piston front side is in the drawing above and the piston rear side is in the drawing below. Thereupon all directions are related in the following description.
  • the valve member 2 consists of a central body 21 which passes through the through hole 11 of the piston, an approximately cylindrical wall body 22 concentrically surrounding the central body 21 and immersed in the annular groove 12, and connecting the central body 21 to the cylindrical wall body 22 on the piston front side Wall area 23.
  • the cylindrical wall body 22 of the valve member 2 receiving annular groove 12 is bounded radially outwardly by an outer groove wall 13 and radially inwardly by an approximately cylindrical wall portion 14 of the piston 1, which separates the annular groove 12 from the through hole 11.
  • the cylindrical wall body 22 of the valve member 2 is positively secured by a latching in the annular groove 12 on the piston by latching elements 24 at the rear end of the wall body 22 in an undercut 15 of the outer Ringnutwand 13 near the groove bottom 16.
  • the cylindrical wall body 22 of the valve member 2 is double-walled and has an outer cylindrical wall 25 and an inner cylindrical wall 26 which form between them a cylindrical annular space 27 which opens open at the rear (in the drawing lower) end of the valve member 2 and on front (in the drawing upper) end of the valve member 2 is closed by the wall portion 23.
  • the wall portion 23 is pierced by a plurality of circumferentially distributed small air passage openings 28 which lead from the front of the valve member into the gap 27.
  • the inner wall 26 of the wall body 22 forms between itself and the annular wall portion 14 a filter section 3, which is formed by thin channels, although let air, but no material pass.
  • the annular wall part 14 is dimensioned in its length so that a gap remains between its front end and the wall region 23.
  • the central body 21 of the valve member 2 forms between its peripheral surface and the inner peripheral surface of the piston passage opening 11 an annular gap 17 through which air to be vented can flow.
  • the actual valve 4 is formed by a conical lateral surface region 41 of the central body and a cooperating sealing edge 42 of a radially inwardly projecting opening wall projection 18 at the rear end of the piston passage opening 11.
  • the valve member as a whole is configured so that the wall portion 23 acts as a spring biasing the central body 21 relative to the locked in the piston outer wall 25 of the cylindrical wall body 22 to the piston back side, so that the central body 21 with its conical peripheral surface area 41 against the Sealing edge 42 of the opening wall projection 18 is pressed to close the valve 4 tight.
  • the central body 21 has at its rear end a pin-like projection 29 which projects beyond the piston rear side 19. If a pressure is exerted against the rear side 19 of the piston during insertion of the piston into a cartridge, the pin-like projection 29 is pressed forward, whereby a valve gap between the conical peripheral surface portion 41 of the central body 21 and the sealing edge 42 of the opening wall projection opens through which can escape to venting air. When removing the back pressure on the piston of the central body springs back to back and closes in cooperation with the sealing edge 42 the valve gap.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

Kartuschenkolben mit Entlüfteventil, wobei ein Ventilteil (2) in eine vorderseitige Aussparung des Kolbens (1) eingesetzt ist, die eine Durchgangsöffnung (11) sowie eine diese umgebende Ringnut (12) umfasst, das Ventilteil (2) aus einem Zentralkörper (21), der die Durchgangsöffnung (11) des Kolbens (1) durchsetzt, und einem diesen mit Abstand umgebenden Wandkörper (22) besteht, der in die Ringnut (12) eintaucht und an der Kolbenvorderseite durch einen Wandbereich (23) mit dem Zentralkörper (21) verbunden ist, der Zentralkörper (21) zwischen sich und einem die Durchgangsöffnung (11) von der Ringnut (12) trennenden Ringwandteil (14) des Kolbens (1) durch einen Ringspalt (17) beabstandet ist und einen sich nach hinten verjüngenden konischen Umfangsflächenbereich (41) hat, der mit einem Dichtrand (42) eines in der Durchgangsöffnung (11) gebildeten Öffnungswandvorsprungs (18) zusammenwirkt, wobei der Wandkörper (22) doppelwandig mit einer äußeren Wand (25) und einer inneren Wand (26) ausgebildet ist, zwischen denen ein Zwischenraum (27) gebildet ist, der am vorderen Ende durch den Wandbereich (23) verschlossen ist, der nur durch mindestens eine, von der Kolbenvorderseite in den Zwischenraum (27) führende Luftdurchtrittsöffnung (28) durchbrochen ist, und wobei zwischen der inneren Wand (26) und dem Ringwandteil (14) die Filterstrecke (3) gebildet ist, in welche Luft aus dem Zwischenraum (27) um das rückwärtige Ende der inneren Wand (26) herum eintreten und aus der Filterstrecke (3) um das vordere Ende des Ringwandteils (14) herum in den Ringspalt (17) gelangen kann.Cartridge piston with vent valve, wherein a valve part (2) is inserted into a front-side recess of the piston (1), which comprises a passage opening (11) and an annular groove (12) surrounding it the valve member (2) consists of a central body (21) which passes through the passage opening (11) of the piston (1) and a wall body (22) which surrounds it at a distance and which penetrates into the annular groove (12) and on the piston front side a wall portion (23) is connected to the central body (21), the central body (21) is separated by an annular gap (17) between itself and an annular wall part (14) of the piston (1) separating the passage opening (11) from the annular groove (12) and has a conically tapered peripheral surface area (41) which cooperates with a sealing edge (42) of an opening wall projection (18) formed in the passage opening (11), wherein the wall body (22) is double-walled with an outer wall (25) and an inner wall (26) between which a gap (27) is formed, which is closed at the front end by the wall portion (23) passing through only at least one, from the piston front side into the intermediate space (27) leading through the air passage opening (28) is broken, and wherein between the inner wall (26) and the annular wall part (14) the filter section (3) is formed, into which air from the intermediate space (27) to the rear end of the inner wall (26) around and from the filter section (3 ) can pass around the front end of the annular wall part (14) into the annular gap (17).

Description

Die Erfindung betrifft einen Kartuschenkolben mit Entlüfteventil. Die Erfindung ist sowohl bei normalen Kolben als auch bei Ringkolben für pastöse Massen enthaltende Kartuschen anwendbar, die nur eine Kammer oder zwei konzentrisch angeordnete Kammern aufweisen können.The invention relates to a cartridge piston with vent valve. The invention is applicable to pasty mass-containing cartridges both in normal pistons and annular pistons, which can have only one chamber or two concentrically arranged chambers.

Das Entlüfteventil dient dazu, beim Einsetzen des Kolbens in das offene rückwärtige Ende der mit dem Füllmaterial gefüllten Kartusche die zwischen der Kolbenvorderseite und der Füllmasse eingeschlossene Luft entweichen zu lassen, gleichzeitig aber zu verhindern, dass auch Füllmasse oder kriechölartige Bestandteile der Füllmasse durch das Entlüfteventil austreten können, oder dass später Luft durch das Entlüfteventil die Füllmasse erreichen kann. Letzteres setzt voraus, dass das Entlüfteventil auch nach dem Setzen des Kolbens dicht bleibt, was wiederum erfordert, dass das Ventil nicht durch Partikel der Füllmasse verschmutzt wird.The vent valve is used to allow the insertion of the piston in the open rear end of the cartridge filled with the filler to escape the trapped between the piston front and the filler air, but at the same time to prevent also filling material or creeping oil-like constituents of the filling material escape through the vent valve can, or later that air through the vent valve can reach the filling material. The latter presupposes that the venting valve remains tight even after the piston has been set, which in turn requires that the valve is not contaminated by particles of the filling compound.

Ein Kartuschenkolben mit Entlüfteventil ist aus der EP 1 207 969 A1 bekannt. Bei der dort dargestellten und beschriebenen Anordnung ist ein Ventilteil in eine entsprechend angepasste Öffnung des Kolbens eingesetzt, das mit dem Kolben zusammenwirkt und mit diesem zusammen ein Ventil bildet. Das Ventilteil hat einen Zentralkörper, der eine Durchgangsöffnung des Kolbens durchdringt, und der einen konischen Bereich hat, der mit einem am Kolben am kolbenrückseitigen Ende der Durchgangsbohrung gebildeten Dichtrand zusammenwirkt.A cartridge piston with bleeder valve is out of the EP 1 207 969 A1 known. In the arrangement shown and described there, a valve member is inserted into a correspondingly adapted opening of the piston, which cooperates with the piston and together with it forms a valve. The valve member has a central body which penetrates a through-hole of the piston and which has a conical portion which cooperates with a sealing edge formed on the piston at the piston-back end of the through-bore.

Der Zentralkörper ist an seinem vorderen, von dem konischen Bereich entfernten Ende über einen frontseitigen Wandbereich mit einem etwa zylindrischen Wandkörper verbunden, der in eine entsprechend geformte Nut an der Kolbenvorderseite eintaucht und nahe dem Nutgrund mit der radial äußeren Nutwand verrastet ist.The central body is connected at its front, remote from the conical region end via a front wall portion with an approximately cylindrical wall body, which is immersed in a correspondingly shaped groove on the piston front side and is latched near the groove bottom with the radially outer groove wall.

Der zylindrische Wandkörper des Ventilteils bildet mit der radial äußeren Nutwand der Kolbennut einen Spalt, der den Eintritt von Luft ermöglicht, und die Verrastung ist durch mehrere Luftkanäle unterbrochen, durch welche Luft hindurchtreten und zwischen dem rückwärtigen Ende des zylindrischen Wandteils und dem Nutgrund hindurch treten kann.The cylindrical wall body of the valve member forms with the radially outer groove wall of the piston groove a gap which allows the entry of air, and the latching is interrupted by a plurality of air passages through which air can pass and pass between the rear end of the cylindrical wall portion and the groove bottom ,

Zwischen der radial inneren Nutwand und dem zylindrischen Wandkörper des Ventilteils ist eine Filterstrecke mit engen Kanälen gebildet, die dazu dient, durch die Luftkanäle der Verrastung hindurch gelangendes Füllmaterial der Kartusche sowie kriechölartige Bestandteile abzufangen und daran zu hindern, zu dem zwischen dem konischen Bereich des Zentralkörpers und dem Dichtlippe des Kolbens gebildeten Ventil zu gelangen. Die Filterstrecke schließt sich dabei an die Verrastung an.Between the radially inner groove wall and the cylindrical wall body of the valve member, a filter channel is formed with narrow channels, which serves to trap through the air ducts of the latch passing filling material of the cartridge and creeping oil-like constituents and to prevent, to between the conical region of the central body and to reach the sealing lip of the piston formed valve. The filter section follows the latching.

Der Zentralkörper steht etwas über die Kolbenrückseite über, so dass bei rückseitig auf den Kolben ausgeübtem Druck, wie er beim Setzen des Kolbens stattfindet, der Zentralkörper etwas nach vorne gedrückt wird, und dadurch sich ein Entlüftungsspalt zwischen dem konischen Bereich des Zentralkörpers und dem Dichtrand am rückwärtigen Ende der Kolbendurchgangsöffnung öffnet, durch welchen Entlüftungsluft austreten kann. Bei Wegnehmen des rückseitig auf den Kolben ausgeübten Drucks schließt das Ventil wieder, weil die frontseitige, den Zentralkörper mit dem zylindrischen Wandkörper verbindende Wandbereich so ausgebildet ist, dass er als Feder wirkt, welche den Zentralkörper in rückwärtiger Richtung vorspannt und mit seinem konischen Bereich in Zusammenwirkung mit dem Dichtrand der Kolbendurchgangsöffnung drückt und so das Ventil geschlossen hält.The central body is slightly above the piston back, so that when pressure is applied to the back of the piston, as it takes place when setting the piston, the central body is pressed slightly forward, and thereby a venting gap between the conical portion of the central body and the sealing edge on opens rear end of the piston passage opening through which venting air can escape. When the back pressure on the piston is removed, the valve closes again because the front wall portion connecting the central body to the cylindrical wall body is designed to act as a spring biasing the central body in the rearward direction and cooperating with its conical portion presses with the sealing edge of the piston passage opening and so keeps the valve closed.

Nachteilig ist bei der bekannten Anordnung allerdings, dass durch den Spalt zwischen dem zylindrischen Wandkörper und der radial äußeren Nutwand eindringendes Füllmaterial der Kartusche die Luftkanäle der Verrastung verstopfen und damit die Entlüftung behindern kann, oder dass durch die Verrastung hindurch dringendes Material dann die sich gleich an die Verrastung anschließende Filterstrecke verstopft. Eine Entlüftung findet dann nicht mehr statt, so dass Restluft zwischen Kolben und Füllmasse zurückbleibt, was generell unerwünscht ist, da chemische Reaktionen oder Beeinträchtigungen des Füllmaterials stattfinden können.A disadvantage of the known arrangement, however, that through the gap between the cylindrical wall body and the radially outer groove wall penetrating filler of the cartridge clog the air ducts of the latch and thus can hinder the vent, or that through the latching urgent material then equal to the catch subsequent filter line clogged. Venting then no longer takes place so that residual air remains between the piston and filling compound, which is generally undesirable because chemical reactions or deterioration of the filling material can take place.

Aufgabe der Erfindung ist es daher, einen Kartuschenkolben mit einem Entlüftungsventil zu schaffen, dessen Entlüftungsfunktion verbessert ist und eine größere Sicherheit der vollständigen Entlüftung bietet.The object of the invention is therefore to provide a cartridge piston with a vent valve, the venting function is improved and offers greater security of the complete venting.

Diese Aufgabe wird gemäß der Erfindung durch die im Anspruch 1 angegebene Anordnung gelöst.This object is achieved according to the invention by the arrangement specified in claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Gemäß der Erfindung findet die Entlüftung nicht mehr über die Verrastung des zylindrischen Wandkörpers im Kolben statt, und die Entlüftung erfolgt auch nicht mehr über den Ringspalt zwischen dem zylindrischen Wandkörper und der radial äußeren Nutwand. Vielmehr ist der zylindrische Wandkörper radial verdickt und doppelwandig ausgebildet, wobei die beiden Wände zwischen sich einen relativ großen Zwischenraum bilden, der rückwärtig offen ausmündet und vorderseitig geschlossen ist.According to the invention, the vent no longer takes place via the latching of the cylindrical wall body in the piston, and the venting is no longer done via the annular gap between the cylindrical wall body and the radially outer groove wall. Rather, the cylindrical wall body is radially thickened and double-walled, wherein the two walls form a relatively large gap between them, the rear opens open and is closed on the front side.

Jedoch sind kleine Luftdurchtrittsöffnungen in dem den Zwischenraum vorderseitig verschließenden Wandbereich des Wandkörpers vorgesehen, durch welche zu entlüftende Luft in den Zwischenraum zwischen den beiden Wänden des zylindrischen Wandkörpers eintreten kann. Zwischen der radial inneren Wand des zylindrischen Wandkörpers und der radial inneren Nutwand ist eine Filterstrecke mit feinen Kanälen gebildet, die etwa durch die Luftdurchtrittsöffnungen eintretendes Material abfangen kann.However, small air passage openings are provided in the wall space of the wall body closing the gap on the front side, through which air to be deaerated can enter into the space between the two walls of the cylindrical wall body. Between the radially inner wall of the cylindrical wall body and the radially inner groove wall, a filter section is formed with fine channels, which can intercept about entering through the air passage openings material.

Aus dem Zwischenraum zwischen den beiden Wänden des zylindrischen Wandkörpers gelangt zu entlüftende Luft also wieder nach vorne strömend zwischen der inneren Wand des Wandkörpers und der radial inneren Nutwand durch die dazwischen gebildete Filterstrecke hindurch, und strömt sodann wieder nach rückwärts umgelenkt durch einen Ringspalt zwischen dem Zentralkörper und der Kolbenöffnungswand hindurch und tritt schließlich durch den geöffneten Ventilspalt zwischen dem konischen Bereich des Zentralkörpers und dem Dichtrand der Kolbendurchgangsöffnung aus.From the space between the two walls of the cylindrical wall body arrives to be vented air again flowing forward between the inner wall of the wall body and the radially inner groove wall through the filter section formed therebetween, and then flows back again deflected by an annular gap between the central body and the piston opening wall and finally exits through the opened valve gap between the conical portion of the central body and the sealing edge of the piston passage opening.

Ein Ausführungsbeispiel der Erfindung wird nachstehend unter Bezugnahme auf die anliegende Zeichnung mehr im einzelnen beschrieben, die einen erfindungsgemäßen Kolben mit einem Entlüfteventil im Axialschnitt zeigt.An embodiment of the invention will be described below in more detail with reference to the accompanying drawing showing a piston according to the invention with a vent valve in axial section.

Die anliegende Zeichnung zeigt im Axialschnitt einen Kolben mit Entlüfteventil nach der Erfindung. In den Kolben 1 ist ein Ventilteil 2 in eine entsprechende Aussparung des Kolbens von dessen Vorderseite her eingesetzt.The accompanying drawing shows in axial section a piston with vent valve according to the invention. In the piston 1, a valve member 2 is inserted into a corresponding recess of the piston from the front side thereof.

Die Aussparung des Kolbens 1, die zur Aufnahme des Ventilteils 2 dient, besteht aus einer Durchgangsöffnung 11 sowie einer diese konzentrisch umgebenden Ringnut 12.The recess of the piston 1, which serves to receive the valve member 2, consists of a through-hole 11 and an annular groove 12 concentrically surrounding it.

Die Kolbenvorderseite ist in der Zeichnung oben und die Kolbenrückseite ist in der Zeichnung unten. Darauf sind alle Richtungsangaben in der folgenden Beschreibung bezogen.The piston front side is in the drawing above and the piston rear side is in the drawing below. Thereupon all directions are related in the following description.

Das Ventilteil 2 besteht aus einem Zentralkörper 21, der die Durchgangsöffnung 11 des Kolbens durchsetzt, einem etwa zylindrischen Wandkörper 22, der den Zentralkörper 21 konzentrisch umgibt und in die Ringnut 12 eintaucht, und einem den Zentralkörper 21 mit dem zylindrischen Wandkörper 22 an der Kolbenvorderseite verbindenden Wandbereich 23.The valve member 2 consists of a central body 21 which passes through the through hole 11 of the piston, an approximately cylindrical wall body 22 concentrically surrounding the central body 21 and immersed in the annular groove 12, and connecting the central body 21 to the cylindrical wall body 22 on the piston front side Wall area 23.

Die den zylindrischen Wandkörper 22 des Ventilteils 2 aufnehmende Ringnut 12 wird radial außen durch eine äußere Nutwand 13 und radial innen durch einen etwa zylindrischen Wandteil 14 des Kolbens 1 begrenzt, der die Ringnut 12 von der Durchgangsbohrung 11 trennt.The cylindrical wall body 22 of the valve member 2 receiving annular groove 12 is bounded radially outwardly by an outer groove wall 13 and radially inwardly by an approximately cylindrical wall portion 14 of the piston 1, which separates the annular groove 12 from the through hole 11.

Der zylindrische Wandkörper 22 des Ventilteils 2 ist durch eine Verrastung in der Ringnut 12 am Kolben formschlüssig fixiert, indem Rastelemente 24 am hinteren Ende des Wandkörpers 22 in eine Hinterschneidung 15 der äußeren Ringnutwand 13 nahe dem Nutgrund 16 einrasten.The cylindrical wall body 22 of the valve member 2 is positively secured by a latching in the annular groove 12 on the piston by latching elements 24 at the rear end of the wall body 22 in an undercut 15 of the outer Ringnutwand 13 near the groove bottom 16.

Der zylindrische Wandkörper 22 des Ventilteils 2 ist doppelwandig ausgebildet und hat eine äußere zylindrische Wand 25 und eine innere zylindrische Wand 26, die zwischen sich einen zylinderringförmigen Zwischenraum 27 bilden, der am hinteren (in der Zeichnung unteren) Ende des Ventilteils 2 offen ausmündet und am vorderen (in der Zeichnung oberen) Ende des Ventilteils 2 durch den Wandbereich 23 verschlossen ist. Der Wandbereich 23 ist durch mehrere am Umfang verteilte kleine Luftdurchtrittsöffnungen 28 durchbrochen, welche von der Vorderseite des Ventilteils in den Zwischenraum 27 führen.The cylindrical wall body 22 of the valve member 2 is double-walled and has an outer cylindrical wall 25 and an inner cylindrical wall 26 which form between them a cylindrical annular space 27 which opens open at the rear (in the drawing lower) end of the valve member 2 and on front (in the drawing upper) end of the valve member 2 is closed by the wall portion 23. The wall portion 23 is pierced by a plurality of circumferentially distributed small air passage openings 28 which lead from the front of the valve member into the gap 27.

Die innere Wand 26 des Wandkörpers 22 bildet zwischen sich und dem Ringwandteil 14 eine Filterstrecke 3, die durch dünne Kanäle gebildet ist, die zwar Luft, aber kein Material hindurchtreten lassen. Der Ringwandteil 14 ist in seiner Länge so bemessen, dass zwischen seinem vorderen Ende und dem Wandbereich 23 ein Zwischenraum verbleibt.The inner wall 26 of the wall body 22 forms between itself and the annular wall portion 14 a filter section 3, which is formed by thin channels, although let air, but no material pass. The annular wall part 14 is dimensioned in its length so that a gap remains between its front end and the wall region 23.

Der Zentralkörper 21 des Ventilteils 2 bildet zwischen seiner Umfangsfläche und der Innenumfangsfläche der Kolbendurchgangsöffnung 11 einen Ringspalt 17, durch den zu entlüftende Luft hindurch strömen kann.The central body 21 of the valve member 2 forms between its peripheral surface and the inner peripheral surface of the piston passage opening 11 an annular gap 17 through which air to be vented can flow.

Das eigentliche Ventil 4 ist durch einen konischen Mantelflächenbereich 41 des Zentralkörpers und einen damit zusammenwirkenden Dichtrand 42 eines radial einwärts vorspringenden Öffnungswandvorsprungs 18 am rückwärtigen Ende der Kolbendurchgangsöffnung 11 gebildet. Das Ventilteil insgesamt ist dabei so konfiguriert, dass der Wandbereich 23 als Feder wirkt, die den Zentralkörper 21 relativ zu der im Kolben verrasteten äußeren Wand 25 des zylindrischen Wandkörpers 22 zur Kolbenrückseite hin vorspannt, so dass der Zentralkörper 21 mit seinem konischen Umfangsflächenbereich 41 gegen den Dichtrand 42 des Öffnungswandvorsprungs 18 gedrückt wird, um das Ventil 4 dicht zu schließen.The actual valve 4 is formed by a conical lateral surface region 41 of the central body and a cooperating sealing edge 42 of a radially inwardly projecting opening wall projection 18 at the rear end of the piston passage opening 11. The valve member as a whole is configured so that the wall portion 23 acts as a spring biasing the central body 21 relative to the locked in the piston outer wall 25 of the cylindrical wall body 22 to the piston back side, so that the central body 21 with its conical peripheral surface area 41 against the Sealing edge 42 of the opening wall projection 18 is pressed to close the valve 4 tight.

Der Zentralkörper 21 hat an seinen hinteren Ende einen zapfenartigen Vorsprung 29, der über die Kolbenrückseite 19 übersteht. Wird beim Einsetzen des Kolbens in eine Kartusche ein Druck gegen die Rückseite 19 des Kolbens ausgeübt, wird dabei der zapfenartige Vorsprung 29 nach vorne gedrückt, wodurch sich ein Ventilspalt zwischen dem konischen Umfangsflächenbereich 41 des Zentralkörpers 21 und dem Dichtrand 42 des Öffnungswandvorsprungs öffnet, durch welchen zu entlüftende Luft entweichen kann. Beim Wegnehmen des rückwärtigen Drucks auf den Kolben federt der Zentralkörper wieder nach rückwärts und schließt im Zusammenwirken mit dem Dichtrand 42 den Ventilspalt.The central body 21 has at its rear end a pin-like projection 29 which projects beyond the piston rear side 19. If a pressure is exerted against the rear side 19 of the piston during insertion of the piston into a cartridge, the pin-like projection 29 is pressed forward, whereby a valve gap between the conical peripheral surface portion 41 of the central body 21 and the sealing edge 42 of the opening wall projection opens through which can escape to venting air. When removing the back pressure on the piston of the central body springs back to back and closes in cooperation with the sealing edge 42 the valve gap.

Beim Setzen des Kolbens tritt Luft aus dem rückwärtigen Bereich der Kartusche zwischen der Füllmasse und der Kolbenvorderseite durch die Luftdurchtrittsöffnungen 28 in den Zwischenraum 27 zwischen der äußeren Wand 25 und der inneren Wand 26 des Wandkörpers 22 ein. Der Strömungsverlauf der Luft beim Entlüftevorgang ist durch Pfeile kenntlich gemacht. Die innere Wand 26 des Wandkörpers 22 ist gegenüber der äußeren, am Nutgrund 16 der Ringnut 12 aufsitzenden Wand 25 etwas kürzer, so dass in den Zwischenraum 27 eingetretene Luft um die rückwärtige Endkante der inneren Wand 26 herum in die Filterstrecke 3 zwischen der inneren Wand 26 und dem Ringwandteil 14 hinein und durch diese hindurch strömen kann. Dann gelangt sie um den Vorderkantenbereich des Ringwandteils 14 herum durch den Zwischenraum zwischen diesem und den Wandbereich 23 in den Ringspalt zwischen dem Zentralkörper 21 und dem Ringwandteil 14, wo die Luft dann durch diesen Ringspalt hindurch strömt und schließlich aus den geöffneten Ventilspalt austreten kann.When setting the piston, air enters from the rear portion of the cartridge between the filling compound and the piston front side through the air passage openings 28 in the gap 27 between the outer wall 25 and the inner wall 26 of the wall body 22. The flow path of the air during the venting process is indicated by arrows. The inner wall 26 of the wall body 22 is slightly shorter relative to the outer, on the groove bottom 16 of the annular groove 12 seated wall 25, so that in the gap 27 occurred air around the rear end edge of the inner wall 26 around in the Filter line 3 between the inner wall 26 and the annular wall part 14 into and through it can flow. It then passes around the leading edge region of the annular wall part 14 through the gap between it and the wall region 23 into the annular gap between the central body 21 and the annular wall part 14, where the air then flows through this annular gap and can finally exit from the opened valve gap.

Claims (2)

Kartuschenkolben mit Entlüfteventil, wobei
ein Ventilteil (2) in eine vorderseitige Aussparung des Kolbens (1) eingesetzt ist, die eine Durchgangsöffnung (11) sowie eine diese umgebende Ringnut (12) umfasst,
das Ventilteil (2) aus einem Zentralkörper (21), der die Durchgangsöffnung (11) des Kolbens (1) durchsetzt, und einem diesen mit Abstand umgebenden Wandkörper (22) besteht, der in die Ringnut (12) eintaucht und an der Kolbenvorderseite durch einen Wandbereich (23) mit dem Zentralkörper (21) verbunden ist,
der Zentralkörper (21) zwischen sich und einem die Durchgangsöffnung (11) von der Ringnut (12) trennenden Ringwandteil (14) des Kolbens (1) durch einen Ringspalt (17) beabstandet ist und einen sich nach hinten verjüngenden konischen Umfangsflächenbereich (41) hat, der mit einem Dichtrand (42) eines in der Durchgangsöffnung (11) gebildeten Öffnungswandvorsprungs (18) zusammenwirkt,
der Zentralkörper (21) an seinem hinteren Ende einen über die Kolbenrückseite (19) überstehenden Vorsprung (29) aufweist, über welchen der Zentralkörper (21) bei einem gegen die Rückseite (19) des Kolbens (1) ausgeübten Druck entgegen einer von dem als Feder wirkenden Wandbereich (23) erzeugten Rückstellkraft nach vorne gedrückt werden kann, um einen Ventilspalt zwischen dem konischen Umfangsflächenbereich (41) und dem Dichtrand (42) zu öffnen,
eine Entlüftestrecke vorgesehen ist, die durch die Ringnut (12) und eine Filterstrecke (3), die zwischen dem Wandkörper (22) und dem Ringwandteil (14) gebildet ist, sowie durch den Ringspalt (17) führt,
dadurch gekennzeichnet, dass der Wandkörper (22) doppelwandig mit einer äußeren Wand (25) und einer inneren Wand (26) ausgebildet ist, zwischen denen ein Zwischenraum (27) gebildet ist, der am vorderen Ende durch den Wandbereich (23) verschlossen ist, der nur durch mindestens eine, von der Kolbenvorderseite in den Zwischenraum (27) führende Luftdurchtrittsöffnung (28) durchbrochen ist,
und dass zwischen der inneren Wand (26) und dem Ringwandteil (14) die Filterstrecke (3) gebildet ist, in welche Luft aus dem Zwischenraum (27) um das rückwärtige Ende der inneren Wand (26) herum eintreten und aus der Filterstrecke (3) um das vordere Ende des Ringwandteils (14) herum in den Ringspalt (17) gelangen kann.Cartridge piston with vent valve, wherein
a valve part (2) is inserted into a front-side recess of the piston (1), which comprises a passage opening (11) and an annular groove (12) surrounding it
the valve member (2) consists of a central body (21) which passes through the passage opening (11) of the piston (1) and a wall body (22) which surrounds it at a distance and which penetrates into the annular groove (12) and on the piston front side a wall portion (23) is connected to the central body (21),
the central body (21) is spaced therefrom by an annular wall portion (14) of the piston (1) separating the passage opening (11) from the annular groove (12) by an annular gap (17) and has a tapered conical peripheral surface portion (41) which cooperates with a sealing edge (42) of an opening wall projection (18) formed in the passage opening (11),
the central body (21) at its rear end over the piston rear side (19) projecting projection (29), via which the central body (21) at a against the back (19) of the piston (1) pressure applied against one of the as Spring-acting wall portion (23) can be pressed forward restoring force generated in order to open a valve gap between the conical peripheral surface region (41) and the sealing edge (42),
a venting path is provided which leads through the annular groove (12) and a filter section (3) which is formed between the wall body (22) and the annular wall part (14) and through the annular gap (17),
characterized in that the wall body (22) is double-walled with an outer wall (25) and an inner wall (26) between which a gap (27) is formed, which is closed at the front end by the wall area (23), which is pierced only by at least one, from the piston front side in the intermediate space (27) leading air passage opening (28),
and in that between the inner wall (26) and the annular wall part (14) the filter section (3) is formed into which air from the intermediate space (27) enters around the rear end of the inner wall (26) and out of the filter section (3 ) can pass around the front end of the annular wall part (14) into the annular gap (17). Kolben mit Entlüfteventil nach Anspruch 1, wobei das Ventilteil (2) durch eine Verrastung (15, 24) zwischen dem Außenumfang der äußeren Wand (25) des Wandkörpers (22) und der äußeren Ringnutwand (13) in der Ringnut (12) verrastet ist.Piston with bleed valve according to claim 1, wherein the valve member (2) by a latching (15, 24) between the outer periphery of the outer wall (25) of the wall body (22) and the outer Ringnutwand (13) is locked in the annular groove (12) ,
EP17001655.4A 2016-10-21 2017-10-09 Cartridge piston with venting valve Active EP3311928B1 (en)

Priority Applications (1)

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PL17001655T PL3311928T3 (en) 2016-10-21 2017-10-09 Cartridge piston with venting valve

Applications Claiming Priority (1)

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DE202016006508.5U DE202016006508U1 (en) 2016-10-21 2016-10-21 Cartridge piston with bleeder valve

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US (1) US20180111155A1 (en)
EP (1) EP3311928B1 (en)
JP (1) JP7094089B2 (en)
DE (1) DE202016006508U1 (en)
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DE102018201748A1 (en) * 2018-02-05 2019-08-08 Anton Topic e. K. piston
DE102022125144A1 (en) * 2022-09-29 2024-04-04 Kulzer Gmbh Cartridge piston device for insertion into a cartridge, method for venting and closing a cartridge and use of a cartridge piston device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626248A1 (en) * 1988-01-21 1989-07-28 Simon Patrick Container with a bleeding piston and its application to dispensers, particularly for cosmetic products
EP1207969A1 (en) 2000-06-09 2002-05-29 Sulzer Chemtech AG Ventilation device for a piston for a cartridge
US20050066809A1 (en) * 2003-09-10 2005-03-31 Heraeus Kulzer Gmbh & Co. Kg Cartridge with pistons that can be de-aerated
DE202006015313U1 (en) * 2006-10-06 2008-02-21 Sulzer Chemtech Ag cartridge plunger

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Publication number Priority date Publication date Assignee Title
DE102006047289B4 (en) 2006-10-06 2008-09-04 Sulzer Chemtech Ag cartridge plunger
DE102008000841B8 (en) * 2008-03-26 2014-07-10 Adcatec Gmbh Cartridge and piston with venting device
TW201029897A (en) 2008-12-12 2010-08-16 Sulzer Mixpac Ag Cartridge piston
CA2690171A1 (en) 2009-02-11 2010-08-11 Sulzer Mixpac Ag Cartridge piston with venting device
WO2011070082A1 (en) * 2009-12-11 2011-06-16 Sulzer Mixpac Ag Cartridge piston
EP2468415A1 (en) * 2010-12-24 2012-06-27 Sika Technology AG Dosing and mixing apparatus for multi-pack products
CN102502060A (en) 2011-10-26 2012-06-20 上海洁诺德包装有限公司 Pumping pressure type packaging bottle
EP2998030A1 (en) 2014-09-17 2016-03-23 Sulzer Mixpac AG Piston for a cartridge, cartridge and method of venting a cartridge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626248A1 (en) * 1988-01-21 1989-07-28 Simon Patrick Container with a bleeding piston and its application to dispensers, particularly for cosmetic products
EP1207969A1 (en) 2000-06-09 2002-05-29 Sulzer Chemtech AG Ventilation device for a piston for a cartridge
US20050066809A1 (en) * 2003-09-10 2005-03-31 Heraeus Kulzer Gmbh & Co. Kg Cartridge with pistons that can be de-aerated
DE202006015313U1 (en) * 2006-10-06 2008-02-21 Sulzer Chemtech Ag cartridge plunger

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PL3311928T3 (en) 2019-05-31
JP7094089B2 (en) 2022-07-01
TR201900810T4 (en) 2019-02-21
JP2018065127A (en) 2018-04-26
DE202016006508U1 (en) 2017-01-09
US20180111155A1 (en) 2018-04-26
EP3311928B1 (en) 2018-11-28

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