EP2522438B1 - Pistons de fermeture et d'impression pour cartouches pour masses plastiques et procédé d'insertion d'un tel piston dans une cartouche - Google Patents

Pistons de fermeture et d'impression pour cartouches pour masses plastiques et procédé d'insertion d'un tel piston dans une cartouche Download PDF

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Publication number
EP2522438B1
EP2522438B1 EP12001289.3A EP12001289A EP2522438B1 EP 2522438 B1 EP2522438 B1 EP 2522438B1 EP 12001289 A EP12001289 A EP 12001289A EP 2522438 B1 EP2522438 B1 EP 2522438B1
Authority
EP
European Patent Office
Prior art keywords
plunger
sealing lip
plate
facing
ribs
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.)
Active
Application number
EP12001289.3A
Other languages
German (de)
English (en)
Other versions
EP2522438A2 (fr
EP2522438A3 (fr
Inventor
Frank Ritter
Oliver Wolf
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.)
Ritter GmbH
Original Assignee
Ritter GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ritter GmbH filed Critical Ritter GmbH
Priority to PL12001289T priority Critical patent/PL2522438T3/pl
Publication of EP2522438A2 publication Critical patent/EP2522438A2/fr
Publication of EP2522438A3 publication Critical patent/EP2522438A3/fr
Application granted granted Critical
Publication of EP2522438B1 publication Critical patent/EP2522438B1/fr
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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
    • 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 sealing and ejecting piston made of elastic plastic for cartridges for plastic masses, which has a venting function, which allows the escape of between the piston and the filling material of the cartridge when inserting the piston in the open rear cartridge end after filling the cartridge.
  • Pistons with bleeding function have long been known.
  • the venting function by itself, because the necessary to achieve a good seal necessarily relatively soft sealing lips at the onset of the piston in the rear end of the cartridge under the pressure of the compressed trapped air between Piston and filling mass moved back the sealing lips and let the trapped air escape.
  • valves in such pistons which have a valve element which open the valve element by a piston setting tool when inserting the piston into the rear end of the cartridge, which then closes elastically again.
  • valve arrangements are not without problems.
  • provision must be made that no filling material can penetrate into the venting passages through the valve mechanism, which could prevent a clean closing of the valve, otherwise the permanent leakage of the valve and the gradual intrusion of ambient air constituents would lead to spoilage of the cartridge contents.
  • a modification of a setting tool of the type just described is from the WO 99/47 433 A1 known, where the setting tool has a conically tapered front ring, which engages in a corresponding, formed on the piston rear V-groove and slightly reduced when advancing the piston diameter, so that air can escape at the periphery.
  • the invention is therefore an object of the invention to provide a piston with forward-facing sealing lip with vent function, which does not require vent valve and allows for insertion into a cartridge reliable ventilation. Preferably should Even the risk of damage to the forward facing sealing lip can be largely reduced.
  • the invention has for its object to provide a method by which a piston with forward-facing sealing lip, which is not itself formed with a special, causing a vent function design, can be used in a cartridge with simultaneous generation of a vent.
  • the venting when setting the piston takes place according to the invention in each case in such a way that the piston is offset by the setting force acting on it by generating a slight bending deformation about a diametrical transverse axis in a slightly out-of-round condition, whereby the forward-facing sealing lip is no longer perfect on the whole Scope of the inner wall of the cartridge abuts, but at diametrically opposite areas leaks are generated, through which the Kobenentlmodalung takes place.
  • the piston or the setting tool used for this purpose is designed so that upon application of the setting force by the pressure of the setting tool on the piston, this deformation is generated.
  • the pistons shown in the drawings each consist of a slightly forwardly curved piston plate 1 and a backward cylindrical skirt 2.
  • the transition region between the piston plate 1 and the contactor 2 is formed with a V-shaped cross-sectional profile which opens to the front, so that a forward-facing obliquely forward and outwardly extending sealing lip 3 is formed on the circumference of the piston plate 1, which cooperates with the inner wall of the cartridge.
  • a forward-facing obliquely forward and outwardly extending sealing lip 3 is formed on the circumference of the piston plate 1, which cooperates with the inner wall of the cartridge.
  • On the outside of the skirt further, axially spaced, but facing rearward sealing lips 4 are formed, which also cooperate with the cartridge inner wall.
  • a radially outer, rearwardly projecting ring 6 is formed on the rear side of the piston plate, which is conical and has an obliquely backwards and inwards to the piston axis extending cross-section and projecting axially beyond the setting ring 5 to the rear.
  • This radially outer ring 6 serves to transmit the thrust force of a Auspressst Zis when expressing the cartridge on the piston, causing its conical shape, that the forward-facing sealing lip 3 seeks to spread outwards and thereby their sealing contact with the cartridge inner wall is reinforced.
  • the in the Fig. 2a and 2b illustrated piston differs from the further feature that the forwardly facing sealing lip 3 has on its inside a coronary arrangement distributed with equal circumferential intervals arranged small radial ribs 7, which are arranged on the inner, so the piston axis side facing the sealing lip. They are not connected to any other part of the piston. They project axially forward slightly beyond the sealing lip 3 and each have an outwardly facing inclined ramp surface 8, which extends obliquely backwards and outwards and merges into the sealing edge surface of the sealing lip 3.
  • Fig. 3a to 3f illustrated piston is formed with other features, which, as will be described below, alternatively or cumulatively used to accomplish a venting function of the piston when inserted into the rear end of the cartridge without the need for a valve can.
  • the setting ring 4 at two diametrically opposite locations in each case a survey in the form of a over the rest of the set ring 5 to the rear projecting nubs 9.
  • These two pimples are on the same (in Fig. 3b drawn) diameter line or transverse axis, with respect to which the ribs 7 are arranged on both sides.
  • the nubs 9 may alternatively be provided to or cumulatively connected to the piston plate 1 ribs 7.
  • Such nubs 9 can therefore also in piston embodiments, as shown in the Fig. 1a and 1b 2a and 2b, are provided, which then with a conventional unchanged setting tool the same effect of bringing about a slight deflection of the piston about the transverse axis or diameter line, on which the two nubs 9 are to bring about, and thereby produce a venting function.
  • the setting tool has there each a projecting central cylindrical portion 10 which engages centering in the setting ring 5, and a graduated, larger diameter cylindrical portion 11 which engages with its front end surface on the rear end surface of the setting ring 5 and the axial thrust transfers to this.
  • the axial thrust is concentrated on two diametrically opposite, ie on a transverse axis or diameter line areas of the set ring of the piston, so that it is slightly bent due to the unequal load around this transverse axis when setting and the venting function takes place.

Landscapes

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

Claims (8)

  1. Piston de fermeture et d'expression en matière plastique élastique, pour cartouches pour masses plastiques, avec une plaque de piston (1) et une jupe (2) cylindrique raccordée à celle-ci en arrière, dans lequel la région de transition entre la plaque de piston (1) et la jupe (2) est configurée avec une section transversale sous forme de V, ainsi formant sur la périphérie une lèvre d'étanchéité (3) tournée de façon oblique vers l'avant et vers l'extérieur, et avec des autres lèvres d'étanchéité (4) tournées vers l'arrière et formées sur la périphérie de la jupe (2), en outre avec un anneau de placement (5) mis en forme à l'arrière de la plaque de piston et axialement saillissant de la plaque de piston (1) en arrière, caractérisé en ce qu'au moins deux saillies (9) axiales distribuées uniformément sur la périphérie sont prévues sur la face d'extrémité de l'anneau de placement (5) tournée vers l'arrière.
  2. Piston de fermeture et d'expression en matière plastique élastique, pour cartouches pour masses plastiques, avec une plaque de piston (1) et une jupe (2) cylindrique raccordée à celle-ci en arrière, dans lequel la région de transition entre la plaque de piston (1) et la jupe (2) est configurée avec une section transversale sous forme de V, ainsi formant sur la périphérie une lèvre d'étanchéité (3) tournée de façon oblique vers l'avant et vers l'extérieur, et avec des autres lèvres d'étanchéité (4) tournées vers l'arrière et formées sur la périphérie de la jupe (2), en outre avec un anneau de placement (5) mis en forme à l'arrière de la plaque de piston et axialement saillissant de la plaque de piston (1) en arrière, caractérisé en ce que la plaque de piston (1) est configurée de manière convexe vers l'avant, et en ce que la lèvre d'étanchéité (3) tournée vers l'avant est liée au moyens d'une pluralité des nervures (7) raccordant la lèvre d'étanchéité (3) tournée vers l'avant avec la plaque de piston (1) et superposant la rainure sous forme de V formée entre cette lèvre d'étanchéité (3) et la plaque de piston (1), qui sont disposés de manière rotosymétrique sur la périphérie de la lèvre d'étanchéité (3) entre deux lignes radiales formant une ligne diamétrale, mais dans lequel les nervures (7) respectivement les plus proches aux lignes radiales présentent une distance l'une de l'autre qui est plus grande que la distance entre les nervures (7) restantes, de sorte que les nervures (7) sont disposées de manière symétrique des deux côtés d'une axe transversale correspondant à cette ligne diamétrale, mais dans lequel les nervures (7) respectivement les plus proches à l'axe transversale présentent une distance l'une vers l'autre qui est plus grande que les distances entre les nervures restantes.
  3. Procédé d'insertion d'un piston en matière plastique élastique dans l'extrémité arrière ouverte d'une cartouche, dans lequel le piston présente une plaque de piston (1), une jupe (2) cylindrique raccordée à celle-ci en arrière, et un anneau de placement (5) saillissant axialement en arrière de la face arrière de la plaque de piston (1) et ayant une face d'extrémité arrière, dans lequel la région de transition entre la plaque de piston (1) et la jupe (2) est configurée avec une section transversale sous forme de V, ainsi formant sur la périphérie de la plaque de piston (1) une lèvre d'étanchéité (3) tournée vers l'avant, caractérisé en ce qu'un outil de placement est utilisé pour l'insertion du piston dans la cartouche, la région (11) du piston transférant une poussée axiale sur l'anneau de placement (5) du piston présentant au moins deux saillies (12; 13) axiales distribuées sur la périphérie.
  4. Piston selon la revendication 1, dans lequel l'anneau de placement (5) présente deux boucles (9) saillissant axialement vers l'arrière et étant situées sur une ligne diamétrale commune.
  5. Piston selon la revendication 2, dans lequel les nervures (7) respectivement dépassent la lèvre d'étanchéité (3) axialement vers l'avant et forment une surface en forme de rampe (8) tournée de façon oblique vers l'avant et vers l'extérieur et passant dans la face latérale de la lèvre d'étanchéité (3).
  6. Piston selon la revendication 2 ou 5, dans lequel l'anneau de placement (5) présente au moins deux boucles (9) qui sont disposées sur sa périphérie, saillissent axialement et sont situées sur lesdites lignes radiales.
  7. Procédé selon la revendication 3, dans lequel l'outil de placement présente deux saillies (12; 13) axiales et diamétralement opposées.
  8. Procédé selon la revendication 3 ou 7, dans lequel les saillies de l'outil de placement sont configurées sous forme des boucles rondes (12) ou sous forme des nervures (13).
EP12001289.3A 2011-05-09 2012-02-28 Pistons de fermeture et d'impression pour cartouches pour masses plastiques et procédé d'insertion d'un tel piston dans une cartouche Active EP2522438B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12001289T PL2522438T3 (pl) 2011-05-09 2012-02-28 Tłok zamykający i wyciskający do wkładów do mas plastycznych i sposób osadzania takiego tłoka we wkładzie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011100976A DE102011100976A1 (de) 2011-05-09 2011-05-09 Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen und Verfahren zum Einsetzen eines solchen Kolbens in eine Kartusche

Publications (3)

Publication Number Publication Date
EP2522438A2 EP2522438A2 (fr) 2012-11-14
EP2522438A3 EP2522438A3 (fr) 2013-03-06
EP2522438B1 true EP2522438B1 (fr) 2014-07-30

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ID=45877932

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Application Number Title Priority Date Filing Date
EP12001289.3A Active EP2522438B1 (fr) 2011-05-09 2012-02-28 Pistons de fermeture et d'impression pour cartouches pour masses plastiques et procédé d'insertion d'un tel piston dans une cartouche

Country Status (3)

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EP (1) EP2522438B1 (fr)
DE (1) DE102011100976A1 (fr)
PL (1) PL2522438T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112018003387A5 (de) 2017-12-06 2020-03-19 3lmed GmbH Verfahren und Setzwerkzeug zum Einsetzen eines Kolbens in einen Behälter
DE102017128958A1 (de) * 2017-12-06 2019-06-06 3lmed GmbH Verfahren und Setzwerkzeug zum Einsetzen eines Kolbens in einen Behälter
DE202018003641U1 (de) * 2018-08-07 2018-08-29 Ritter Gmbh Mit Zentrierhilfe ausgestatteter Kartuschenkolben

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229588C2 (de) * 1992-09-04 1995-07-13 Alfred Fischbach Kunststoff Sp Kartusche für pastöse Massen
DE29702551U1 (de) * 1997-02-14 1997-03-27 Prestele, Eugen, 86161 Augsburg Verschlußvorrichtung
WO1999047433A1 (fr) * 1998-03-19 1999-09-23 Hugo Nilsson Extremite de cartouche, procede et outil de mise en oeuvre de cette extremite
DE20319464U1 (de) * 2002-12-10 2004-04-22 Topic, Anton Kolben für eine Kartusche zum Aufbewahren und Auspressen von pastösen Substanzen und Kartusche mit demselben
DE202006015313U1 (de) * 2006-10-06 2008-02-21 Sulzer Chemtech Ag Kartuschenkolben
DE202008007834U1 (de) * 2008-06-12 2008-08-21 Gfv Verschlusstechnik Gmbh & Co. Kg Kolben zum Auspressen von Füllsubstanzen

Also Published As

Publication number Publication date
EP2522438A2 (fr) 2012-11-14
PL2522438T3 (pl) 2015-01-30
DE102011100976A1 (de) 2012-11-15
EP2522438A3 (fr) 2013-03-06

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