EP0301327A2 - Piston pour cartouche - Google Patents

Piston pour cartouche Download PDF

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Publication number
EP0301327A2
EP0301327A2 EP19880111296 EP88111296A EP0301327A2 EP 0301327 A2 EP0301327 A2 EP 0301327A2 EP 19880111296 EP19880111296 EP 19880111296 EP 88111296 A EP88111296 A EP 88111296A EP 0301327 A2 EP0301327 A2 EP 0301327A2
Authority
EP
European Patent Office
Prior art keywords
piston
cartridge
jacket
reinforcing ring
piston body
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
EP19880111296
Other languages
German (de)
English (en)
Other versions
EP0301327A3 (en
EP0301327B1 (fr
Inventor
Werner Brüning
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.)
Alfred Fischbach KG Kunststoff Spritzgusswerk
Original Assignee
Alfred Fischbach KG Kunststoff Spritzgusswerk
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 Alfred Fischbach KG Kunststoff Spritzgusswerk filed Critical Alfred Fischbach KG Kunststoff Spritzgusswerk
Priority to AT88111296T priority Critical patent/ATE77266T1/de
Publication of EP0301327A2 publication Critical patent/EP0301327A2/fr
Publication of EP0301327A3 publication Critical patent/EP0301327A3/de
Application granted granted Critical
Publication of EP0301327B1 publication Critical patent/EP0301327B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/76—Containers or packages with special means for dispensing contents for dispensing fluent contents by means of a piston

Definitions

  • the invention relates to a cartridge piston according to the preamble of claim 1.
  • the cartridges mentioned are suitable for accommodating and dispensing sealants, adhesives and other hardenable materials.
  • the piston is advanced by inserting a drive disk of the extrusion tool into the piston, which drives the piston when the extrusion tool is actuated.
  • Another possibility is to carry out the piston propulsion pneumatically by applying compressed air to the rear end of the cartridge, which drives the piston forward.
  • the piston which consists of a one-piece plastic body, must not be too hard so that it can nestle against the inside of the cartridge wall, the wiper lips being pressed firmly against the cartridge wall.
  • the cartridge contains a viscous and particularly adhesive mass
  • the piston sticks locally to the cartridge wall. If the piston is then to be pushed forward to squeeze out the mass, it sticks to one side of its circumference on the cartridge wall and there is a risk of the piston tipping over.
  • the piston is deformed so that it assumes an inclined position in the interior of the cartridge space.
  • the risk that the contents of the cartridge come into contact with air and cross-links and on the other hand the deformation of the piston makes it impossible to continue using the cartridge to squeeze out the mass.
  • a cartridge with a tilted piston can practically no longer be used.
  • the risk of the piston tipping over is particularly great in the case of pistons which are propelled with compressed air.
  • the invention has for its object to provide a cartridge piston of the type specified in the preamble of claim 1, which is secured while maintaining its sealing properties against deformation in the cartridge space.
  • the cartridge piston according to the invention has a conventional piston body, as it is used for pressing out viscous masses, such as, for. B. sealants is used.
  • a reinforcing ring made of relatively rigid material is inserted into the cartridge body, which supports the jacket of the cartridge body from the inside, so that the reinforcing ring containing pistons is stiffened and secured against compression.
  • the piston is rigid as a whole, the ability of the jacket to nestle against the cartridge wall is retained. In particular, the elasticity of the wiper lips is not reduced by the inner support of the piston body.
  • the cartridge plunger according to the invention can be used in all types of cartridges, but it is preferably used in aluminum cartridges which contain viscous or lightly adhesive compositions.
  • a particular advantage is that the same piston body without a reinforcement ring for cartridges can be used which contain a mass in which the risk of the piston sticking to the cartridge is low, while the piston body with the reinforcing ring is used in cartridges in which the risk of sticking the piston is particularly great due to its content.
  • the piston body with the reinforcing ring is used in cartridges in which the risk of sticking the piston is particularly great due to its content.
  • only a single type of piston body is required, which can optionally be equipped with a reinforcement ring.
  • the assembly of the reinforcement ring is very simple, because the reinforcement ring is simply inserted into the cavity of the piston body, where it is held in place by clamping or rubbing.
  • the reinforcement ring does not require any changes to the extrusion tools because it does not change the outer dimensions of the piston. If the extrusion tool is equipped with a thrust washer, it can engage at the rear end of the reinforcing ring, the reinforcing ring transmitting the driving force to the piston body.
  • the reinforcing ring is expediently provided with an inner flange at its rear end.
  • This inner flange makes it easier to grip the drive disk of the extrusion tool and increases the dimensional stability of the reinforcement ring.
  • the reinforcement ring can have a barb profile projecting outwards at its front end.
  • Cartridge pistons are usually fed to a filling machine by means of vibrators conveyors or other vibrators that subject the piston to acceleration forces.
  • the barb profile prevents the reinforcing rings previously introduced into the piston body from migrating out of the piston body again.
  • cartridge pistons that have a conical ring collar in the interior of their cavity, which protrudes inwards from the corner between the jacket and the end wall and causes the front piston end to widen when the drive disk of the extrusion tool presses against it.
  • the reinforcement ring against which the thrust disk can engage, presses against this ring collar. In this way, the expansion function of the ring collar is maintained.
  • a cylindrical cartridge 10 which can consist of metal or plastic, for example.
  • the one-piece cartridge 10 has a cylindrical jacket 11, which is closed at one end by an end wall 12 in which an extrusion connector 13 is provided.
  • the piston 14 is displaceable in the cartridge 10.
  • the piston 14 has a cylindrical jacket 15, the outside diameter of which is somewhat smaller than the inside diameter of the jacket 11 of the cartridge. At the front end of the jacket 15 there is a radially projecting bead 16, behind which a first sealing lip 17 is arranged, which also protrudes outwards. Further sealing lips 18 and 19 are located near the rear end of the jacket 15.
  • the front end of the jacket 15 is closed by the front wall 20, which is arched forward.
  • the front wall 20 In the center of the end wall 20 there is a conical projection 21, while an annular rib 22 is formed on the inside of the end wall 20.
  • the tip 21 and the rib 22 serve to stiffen the end wall 20.
  • a frustoconical ring collar 23 protrudes from the annular edge on which the jacket 15 and end wall 20 abut against one another into the cavity 24 in the interior of the piston body 14.
  • This thrust washer abuts the tapered end of the ring collar 23.
  • the ring collar 23 slightly widens the front end of the jacket 15 so that the bead 16 firmly against the Cartridge jacket 11 is pressed when the piston body 14 is driven against the force of the plastic mass located in the cartridge 10.
  • the piston body 14 described consists of a one-piece plastic part made of medium-hard plastic.
  • the piston body is relatively stiff in the region of its end wall 20, but it is easily deformable in the region of the rear end.
  • the reinforcement ring 25 is provided, which can be inserted into the cavity 24.
  • This reinforcing ring 25 is made of relatively hard plastic. It has a cylindrical shape and its outer diameter is slightly larger than the inner diameter of the jacket 15, so that the reinforcing ring can be pushed into the piston body 14 by clamping or rubbing.
  • At the front end of the reinforcement ring 25 there is an outer circumferential barb profile 26 which allows the reinforcement ring 25 to be easily pushed into the piston body 14, but makes it difficult to pull it out.
  • At the rear end of the reinforcement ring 25 there is an inwardly directed flange 27 which gives the reinforcement ring an even greater dimensional stability and also serves to facilitate the attachment of a thrust washer.
  • the length of the reinforcement ring 25 is dimensioned such that the reinforcement ring does not protrude from the rear end of the piston body 14 when its front end abuts the ring collar 23. As can be seen from FIG. 1, the reinforcement ring 25 presses against the ring collar 23, so that its effect of spreading apart the piston body 14 when a mechanical propulsive force is exerted on the piston body is maintained even when the reinforcement ring 25 is inserted.
  • the piston body 14 can optionally be used with or without a reinforcement ring 25, depending on the type of application or the plastic mass to be propelled by the piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Coating Apparatus (AREA)
  • Package Specialized In Special Use (AREA)
EP88111296A 1987-07-25 1988-07-14 Piston pour cartouche Expired - Lifetime EP0301327B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88111296T ATE77266T1 (de) 1987-07-25 1988-07-14 Kartuschenkolben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8710233U DE8710233U1 (de) 1987-07-25 1987-07-25 Kartuschenkolben
DE8710233U 1987-07-25

Publications (3)

Publication Number Publication Date
EP0301327A2 true EP0301327A2 (fr) 1989-02-01
EP0301327A3 EP0301327A3 (en) 1990-02-28
EP0301327B1 EP0301327B1 (fr) 1992-06-17

Family

ID=6810466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111296A Expired - Lifetime EP0301327B1 (fr) 1987-07-25 1988-07-14 Piston pour cartouche

Country Status (3)

Country Link
EP (1) EP0301327B1 (fr)
AT (1) ATE77266T1 (fr)
DE (2) DE8710233U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0316102A3 (en) * 1987-11-11 1989-08-30 Dow Corning Corporation Sealant cartridge
GB2237607A (en) * 1989-11-04 1991-05-08 Metal Box Plc Containers
WO1999047433A1 (fr) * 1998-03-19 1999-09-23 Hugo Nilsson Extremite de cartouche, procede et outil de mise en oeuvre de cette extremite
EP1514611A2 (fr) 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139744C2 (de) * 1991-12-03 1994-07-21 Alfred Fischbach Kunststoff Sp Kartusche für plastische Massen
DE4333811A1 (de) * 1993-10-04 1995-04-06 Falk Walter Schneider Kolben zum Fördern von niedrig- bis hochviskosen Flüssigkeiten aus Kartuschen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK142275B (da) * 1978-03-14 1980-10-06 Ole Simonni Mundeling Nielsen Stempel til udpresning af en viskos eller plastisk masse fra en cylindrisk beholder eller emballage.
DE3148490C2 (de) * 1981-12-08 1986-02-13 Alfred Fischbach Kg Kunststoff-Spritzgusswerk, 5250 Engelskirchen Bodenverschluß für einen hohlzylindrischen Strangpreßbehälter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0316102A3 (en) * 1987-11-11 1989-08-30 Dow Corning Corporation Sealant cartridge
GB2237607A (en) * 1989-11-04 1991-05-08 Metal Box Plc Containers
GB2237607B (en) * 1989-11-04 1993-01-20 Metal Box Plc Containers
WO1999047433A1 (fr) * 1998-03-19 1999-09-23 Hugo Nilsson Extremite de cartouche, procede et outil de mise en oeuvre de cette extremite
EP1514611A2 (fr) 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent
DE10342090A1 (de) * 2003-09-10 2005-04-28 Heraeus Kulzer Gmbh Verschlusskolben für Kartuschen mit Entlüftung und Barriereeigenschaften
DE10342090B4 (de) * 2003-09-10 2007-06-06 Heraeus Kulzer Gmbh Verschlusskolben für Kartuschen mit Entlüftung und Barriereeigenschaften
EP1514611A3 (fr) * 2003-09-10 2007-12-26 Heraeus Kulzer GmbH Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent
US7353972B2 (en) 2003-09-10 2008-04-08 Heraues Kulzer Gmbh & Co. Kg Sealing piston for cartridges with de-aeration and barrier properties

Also Published As

Publication number Publication date
EP0301327A3 (en) 1990-02-28
DE8710233U1 (de) 1987-11-05
DE3872086D1 (de) 1992-07-23
ATE77266T1 (de) 1992-07-15
EP0301327B1 (fr) 1992-06-17

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