EP3608029A1 - Piston pour cartouche équipé d'aide de centrage - Google Patents

Piston pour cartouche équipé d'aide de centrage Download PDF

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Publication number
EP3608029A1
EP3608029A1 EP19000324.4A EP19000324A EP3608029A1 EP 3608029 A1 EP3608029 A1 EP 3608029A1 EP 19000324 A EP19000324 A EP 19000324A EP 3608029 A1 EP3608029 A1 EP 3608029A1
Authority
EP
European Patent Office
Prior art keywords
wall
ribs
sealing lip
piston
cartridge
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
EP19000324.4A
Other languages
German (de)
English (en)
Other versions
EP3608029B1 (fr
Inventor
Frank Ritter
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
Publication of EP3608029A1 publication Critical patent/EP3608029A1/fr
Application granted granted Critical
Publication of EP3608029B1 publication Critical patent/EP3608029B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05C17/00576—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

Definitions

  • the invention relates to a cartridge piston which is designed with a formation designed as an improved centering aid in order to facilitate centering of the piston when it is inserted into the rear end of a cartridge.
  • Cartridge pistons are placed in cartridges filled with the filling compound by mechanically inserting the piston into the rear end of the cartridge. Pistons are fed into the piston setting machine and are then inserted axially into the rear end of a cartridge filled with filling compound. It is important that the plunger, which inevitably has a certain, albeit slight, play in movement so that it can be fed into the plunger setting machine smoothly, is centered in the rear end of the cartridge in the initial phase of the insertion process. There is a risk here that the piston can tilt if it first comes into contact with the cartridge wall on one side.
  • the object of the invention is to design a cartridge piston so that an optimal centering and the best possible protection of the sealing lip can take place during the setting process without impairing its other functions.
  • the cover wall is axially stepped near the transition into the peripheral wall and has a ring of radial Provide ribs whose forward-facing edges continue the contour of the top wall and which protrude radially slightly beyond the peripheral wall.
  • the radial ribs serve as centering ribs and are arranged axially in front of the sealing lip which extends obliquely outwards from the casing wall and have a radial extension which ends in front of the sealing lip, so that the sealing lip can be used optimally.
  • the radial ribs are arranged with relatively small angular distances from one another, preferably with angular distances of not more than 30 °, and preferably with angular distances from 20 ° to 15 °.
  • the radial ribs are located axially in front of the sealing lip arranged on the jacket wall and extending to the front, the axial height of the ribs results in a sufficient axial distance between the front piston end and the front end of the sealing lip so that the ribs are precentered when Inserting the piston have the piston centered before the axially following sealing lip comes into contact with the insertion slope of the cartridge. Because the sealing lip, which is thin and therefore sensitive due to the necessary flexibility, is not touched until the piston is already centered, the risk of damage to the sealing lip due to one-sided loads in cooperation with the cartridge wall is greatly reduced. Since the ribs are located axially in front of the sealing lip, the sealing lip has unhindered radial mobility over the entire circumference of the piston despite a certain radial projection of the ribs over the lateral wall of the piston.
  • the 1 and 2 show the piston according to the invention, which has a top wall 1, which is curved slightly forward in the usual way, and a jacket wall 2 adjoining it on the circumference backwards. Approximately in the middle of the axial extent the jacket wall 2 is arranged thereon via a connecting projection 3 a forwardly pointing and slightly outwardly inclined sealing lip 4, which also has a leg 5 running from the connecting projection 3 backwards and slightly obliquely outwards. The rear region of the peripheral wall 2 of the piston widens slightly outwards.
  • the top wall 1 of the piston has an axial step 6 in the area of its circumference, as can be seen in the left half of the Fig. 2 sees clearly.
  • a ring of radial ribs 7 Arranged on this gradation 6 is a ring of radial ribs 7, the forward-facing edges of which harmoniously continue the contour of the region of the top wall 1 lying radially within the gradation 6, and the radially somewhat over the circumference of the jacket wall 6 in its region axially in front of the connecting shoulder 3 protrude and continue axially along this lateral wall area a short distance to the rear.
  • these ribs 7 have mutual angular distances of 15 °. As already mentioned, it is important for a good pre-centering that these ribs 7 have relatively small and uniform angular distances from one another and are therefore relatively numerous, so that an effective pre-centering at a plurality of evenly, namely rotationally symmetrical, points distributed over the circumference
  • the piston can be inserted into the rear end of a cartridge.
  • the angular spacing of the ribs 7 should therefore not be less than 30 °.
  • the numerous ribs mean that the piston has a very high degree of rigidity locally in the area of the top wall circumference, and thus in the connection area between top wall 1 and jacket wall 2, which in turn considerably promotes pre-centering during insertion and prevents deformation of the piston when asymmetrical forces arise which could otherwise lead to tilting.
  • the ribs 7 have a relatively large axial extent, and the sealing lip 4 is located axially behind these ribs 7.
  • the above-mentioned effect occurs that pre-centering can take place over a relatively large axial distance when the piston is inserted, and that Piston in the rear end of the cartridge is already very well centered before the front end of the sealing lip 4 can come into contact with the wall of the cartridge for the first time.
  • the radial centering ribs 7 end radially in front of the sealing lip, so that they can be used without hindrance can and has an unimpeded radial freedom of movement in order to be able to optimally cooperate with the cartridge wall in any position and also in the event of non-roundness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Coating Apparatus (AREA)
EP19000324.4A 2018-08-07 2019-07-05 Piston pour cartouche équipé d'aide de centrage Active EP3608029B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202018003641.2U DE202018003641U1 (de) 2018-08-07 2018-08-07 Mit Zentrierhilfe ausgestatteter Kartuschenkolben

Publications (2)

Publication Number Publication Date
EP3608029A1 true EP3608029A1 (fr) 2020-02-12
EP3608029B1 EP3608029B1 (fr) 2022-04-27

Family

ID=63525315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19000324.4A Active EP3608029B1 (fr) 2018-08-07 2019-07-05 Piston pour cartouche équipé d'aide de centrage

Country Status (3)

Country Link
EP (1) EP3608029B1 (fr)
DE (1) DE202018003641U1 (fr)
PL (1) PL3608029T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108642A1 (de) 2021-04-07 2022-10-13 Ritter Gmbh Nachlaufender Kolben mit Stützlippe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110529U1 (de) * 1991-08-26 1991-10-10 Prestele, Eugen, 8900 Augsburg Kartusche
US20110309111A1 (en) * 2010-06-22 2011-12-22 Fischbach Kg Kunststoff Technik Cartridge piston
DE102011100976A1 (de) * 2011-05-09 2012-11-15 Ritter Gmbh Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen und Verfahren zum Einsetzen eines solchen Kolbens in eine Kartusche

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9110529U1 (de) * 1991-08-26 1991-10-10 Prestele, Eugen, 8900 Augsburg Kartusche
US20110309111A1 (en) * 2010-06-22 2011-12-22 Fischbach Kg Kunststoff Technik Cartridge piston
DE102011100976A1 (de) * 2011-05-09 2012-11-15 Ritter Gmbh Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen und Verfahren zum Einsetzen eines solchen Kolbens in eine Kartusche

Also Published As

Publication number Publication date
PL3608029T3 (pl) 2022-09-19
EP3608029B1 (fr) 2022-04-27
DE202018003641U1 (de) 2018-08-29

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