EP0281755A1 - Cartouche-distributrice à piston refoulant - Google Patents

Cartouche-distributrice à piston refoulant Download PDF

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Publication number
EP0281755A1
EP0281755A1 EP88101393A EP88101393A EP0281755A1 EP 0281755 A1 EP0281755 A1 EP 0281755A1 EP 88101393 A EP88101393 A EP 88101393A EP 88101393 A EP88101393 A EP 88101393A EP 0281755 A1 EP0281755 A1 EP 0281755A1
Authority
EP
European Patent Office
Prior art keywords
piston
cartridge
plunger
discharge
wall
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
EP88101393A
Other languages
German (de)
English (en)
Other versions
EP0281755B1 (fr
Inventor
Wilhelm A. Keller
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.)
KELLER, WILHELM A.
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0281755A1 publication Critical patent/EP0281755A1/fr
Application granted granted Critical
Publication of EP0281755B1 publication Critical patent/EP0281755B1/fr
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
    • B05C17/01—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 manually mechanically or electrically actuated piston or the like
    • 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
    • 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
    • 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
    • B05C17/01—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 manually mechanically or electrically actuated piston or the like
    • B05C17/014—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 manually mechanically or electrically actuated piston or the like comprising means for preventing oozing

Definitions

  • the invention relates to a discharge cartridge with at least one supply cylinder and a delivery piston guided therein, which has a piston body formed from the piston crown and piston wall and sealing members sliding along the cylinder wall and is intended for gradual advancement by a discharge plunger, parts of the piston body being elastically deformable by the action of a plunger.
  • Discharge cartridges of this type are used in a known manner for receiving and processing pasty, medium to low viscosity masses which are expelled through the cartridge mouth when acting on the delivery piston.
  • a difficulty in working with such cartridges is that the content tends to flow after the discharge plunger has stopped acting on the delivery piston. This phenomenon is undesirable and troublesome because it makes it impossible to work properly and to dispense small portions in a precisely metered manner.
  • a discharge cartridge of the type mentioned is known, the piston head on the one-piece delivery piston being curved toward the discharge plunger and the seal being formed by the cylindrical piston wall.
  • the piston crown is pressed flat, which is intended to achieve an increased sealing effect due to the radial expansion of the piston wall; in addition, the piston crown bulges out again after the plunger stroke has ended, so that the contents of the cartridge do not flow again.
  • the volume change that can be achieved solely by deforming the piston crown is very limited and, particularly when the cartridge is still full, is hardly sufficient to compensate for the "breathing" of the cartridge or to prevent it from flowing freely.
  • the piston head on the one-piece delivery piston is curved toward the contents of the cartridge;
  • a sealing lip is formed on the outer edge of the piston head, and the piston wall lies frictionally against the cartridge wall at a distance from the sealing lip.
  • the purpose of this design of the piston is to avoid air pockets when the filled cartridge is closed.
  • the piston crown becomes in each case during the ram advance elastically deformed between the plunger plate and the contents, ie partially flattened, in order to press the sealing lip radially against the cartridge wall during advance and then to lift it again when the piston crown is relieved and reshaped; the seal in the idle state is then given solely by the frictional piston wall section.
  • the flow is even increased by the piston crown bulging back against the cartridge content and thereby reducing the available cartridge volume.
  • the object of the present invention is to effectively prevent an uncontrolled reflow of the cartridge contents after each partial discharge and to keep the piston friction as low as possible without compromising tightness in a loaded and unloaded state by suitable design of the discharge cartridge, in particular the delivery piston.
  • this object is achieved in that a sealing ring is inserted into an annular groove adjoining the rigid piston head and the annular groove cross section can be deformed by squeezing the sealing ring in order to allow the delivery piston to retract against the feed direction when the tappet is relieved.
  • the unimpeded retraction of the entire delivery plunger is facilitated by the low friction of the elastic sealing ring when unloaded and with a guaranteed sealing effect. Moreover, it is a precise dimensioning of the cross-sectional deformation (crushing) of the sealing ring between the loaded (feed) and unloaded state is possible through predetermined, local deformation of the annular groove.
  • the discharge plunger or the plunger can generally be operated by hand, but special discharge devices with e.g. mechanically or pneumatically driven discharge plunger or plunger. With such a device, it has already been proposed (EP-A 0 252 401 by the same owner) to quickly and automatically return the discharge plunger (s) after each feed step to a certain extent and to lift them off the delivery piston of the cartridge in order to immediately relieve the pressure on the cartridge.
  • FIGS. 2 and 3 show the discharge cartridge with delivery piston in longitudinal section and the associated discharge plunger; however, for the sake of simplicity, the cylinder wall 3 of the cartridge is only indicated with dash-dotted lines in FIGS. 2 and 3.
  • the upper half shows the relieved state when the plunger is at a standstill, while the lower half shows the situation during a feed step when the delivery piston and the sealing ring are elastically deformed; the respective deformation can be clearly seen from the comparison at the same height.
  • the discharge cartridge 1 has a storage cylinder 3 with a mouth 4 and a delivery piston 10 guided in the cylinder 3.
  • a plunger 19 of a discharge device is used to advance the delivery piston 10 step by step against the cartridge mouth 4 in order to press out the cartridge content 2 through the mouth 4.
  • the piston body of the delivery piston 10 formed by the rigid piston head 12 and the piston wall 14 is provided with sealing members sliding along the cylinder wall 3, in the form of an elastic sealing ring 11 (so-called O-ring), which fits into an annular groove 18 adjoining the piston head 12 is inserted.
  • the piston body is thus elastically deformable by axially displacing the piston wall 14 against the piston crown 12, the groove flank formed on the piston wall being axially displaced and the cross section of the annular groove 18 narrowing, with the sealing ring being pinched.
  • the end face 16 of the piston wall 14 facing the plunger 19 forms a first contact area for the plunger.
  • a second contact area is formed by the end face 17 of a support cylinder 12a formed on the piston head 12, which end face is slightly behind the first area 16 in the undeformed state of the piston body (upper half of FIG. 1).
  • the plunger 19 When the plunger 19 begins to advance in the direction of the arrow (lower half of FIG. 1), it initially pushes the plunger wall 14 against the plunger base over the support 16 with the counterpressure of the cartridge content 2 onto the plunger base 12, the diaphragm 15 deforming the groove 18 narrowed and the ring 11 are squeezed. This deformation of the piston comes to a standstill as soon as the second support 17 also comes into play on the tappet and the deformed piston is then displaced as a whole.
  • the required pressure of the sealing ring 18 (as well as the sealing members in the exemplary embodiments described below) on the cartridge cylinder in the unloaded, undeformed state of the delivery piston is comparatively low because only the practically unpressurized cartridge content needs to be sealed during storage and the pauses between the feed steps; this fact enables the plunger to be sufficiently retracted towards the plunger when the plunger is relieved. Because then the piston crown 12 rigid and also the respective deformation of the Kol is precisely defined, there is a precise relationship between the ram stroke and the volume discharged through the cartridge mouth 4; This is particularly important in the case of two-component systems which are discharged from double cartridges, since the exact volumetric ratio of the two partial quantities discharged from the two cartridge cylinders per ram stroke is important.
  • the radial gap 13 need not necessarily be symmetrical to the two side flanks of the annular groove 18 as in FIG. 1. Rather, it can also be shifted (slightly different from FIG. 1) to one side flank, so that this e.g. just merges into one side wall of the gap 13.
  • the feed piston 20 provided with piston head 22 and piston wall 24 according to FIG. 2 also has an annular groove 28, into which a sealing ring 21 is inserted.
  • the base 23 of the groove 28, which connects the piston wall 24 in one piece to the rigid piston head 22, is thin-walled and correspondingly deformable; opposite him is a conical section 26 of the discharge plunger 2g on the inside.
  • the groove base 23 forms a first contact area when the plunger feed begins and is deformed by the plunger section 26 while narrowing the groove cross section and correspondingly pinching the ring 21.
  • the deformation is ended as soon as the tappet end face meets a support surface 27 on the piston crown 22. About this additional support then the forward stroke of the deformed delivery piston (lower half in Fig. 2) takes place with increased pressure on the sealing ring 21. At the end of the feed, with relieved or slightly returned plunger 29, the deformation of the groove base and the sealing ring disappears immediately, whereby the piston 20 withdraws and the cartridge content does not flow again.
  • piston crown 32, pistons wall 34, annular groove 38 and sealing ring 31 similarly designed as in the example according to FIG. 2.
  • the groove cross section is narrowed and the ring 31 is squeezed by axial displacement of the one groove flank formed on the piston wall 34 by the end face 35 of the piston wall faces a collar surface 36 on the tappet 39 and forms a first contact area for the latter.
  • a support surface 37 on the piston crown rests on the plunger only when the piston is deformed during the advance and forms an additional contact area which limits the piston deformation.
  • a conical tappet section 36a (or shaped corresponding to the groove base 33) can support the groove base radially during the advance.
  • the groove cross sections are designed in an unusual manner and the sealing ring is subjected to deformations which are generally not considered to be permissible for low-wear permanent function in machine and apparatus construction.
  • additional design options are specifically used, which are given by the fact that such dispensing cartridges are disposable products, the components of which only have to withstand a few functional cycles. Nevertheless, with the measures according to the invention the desired effect and a high level of functional reliability can be achieved during the short period of use. Since the elastic deformation of the groove cross section caused by the tappet is also accompanied by a radial expansion of the sealing ring, the piston seal follows the expanding, "breathing" cartridge wall while maintaining sufficient pressure, so that the secure seal is retained even during the advance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Coating Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP88101393A 1987-02-13 1988-02-01 Cartouche-distributrice à piston refoulant Expired - Lifetime EP0281755B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH55587 1987-02-13
CH555/87 1987-02-13

Publications (2)

Publication Number Publication Date
EP0281755A1 true EP0281755A1 (fr) 1988-09-14
EP0281755B1 EP0281755B1 (fr) 1990-11-07

Family

ID=4189705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101393A Expired - Lifetime EP0281755B1 (fr) 1987-02-13 1988-02-01 Cartouche-distributrice à piston refoulant

Country Status (5)

Country Link
US (1) US4834268A (fr)
EP (1) EP0281755B1 (fr)
JP (1) JPH067940B2 (fr)
DE (1) DE3860957D1 (fr)
ES (1) ES2019410B3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005007055A1 (de) * 2005-02-15 2006-08-24 Kettenbach Gmbh & Co. Kg Vorrichtung zum Ausbringen von Ein- oder Mehrkomponentenmassen und Kolben hierfür
US7353972B2 (en) 2003-09-10 2008-04-08 Heraues Kulzer Gmbh & Co. Kg Sealing piston for cartridges with de-aeration and barrier properties
WO2009068311A1 (fr) 2007-11-28 2009-06-04 Inatec Gmbh Plaque de raclage de piston pour dispositifs d'éjection pour générateurs de colle à chaud et générateur de colle à chaud pourvu d'une telle plaque
CN111517013A (zh) * 2020-06-04 2020-08-11 沈阳吉畅科技有限公司 基于物联网的化工产品生产过程终端控制装置
CN115502035A (zh) * 2021-06-07 2022-12-23 万润科技股份有限公司 液室机构及液材挤出装置

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5127552A (en) * 1989-08-24 1992-07-07 Dow Corning Corporation Foam mixer-applicator with foaming chamber and method of using
US5058769A (en) * 1990-03-05 1991-10-22 Liquid Control Corporation Self-contained pneumatic gun for dispensing flowable materials
EP0497739B1 (fr) * 1991-01-29 1996-10-09 Wilhelm A. Keller Cartouche de décharge avec cylindre de réserve et piston de convoyage
DE9110529U1 (de) * 1991-08-26 1991-10-10 Prestele, Eugen, 8900 Augsburg Kartusche
US5289949A (en) 1992-06-22 1994-03-01 Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. Multi-cavity dispensing refill cartridge
US5400925A (en) * 1993-12-09 1995-03-28 Coltene/Whaledent, Inc. Dispensing device adapted for dispensing more than one material from a cartridge
USD362722S (en) 1994-02-04 1995-09-26 Coltene/Whaldent, Inc. Dental cartridge
US5672357A (en) * 1994-07-01 1997-09-30 Monsanto Company Method and device for implantation of large diameter objects in bovines
US5595752A (en) * 1994-07-01 1997-01-21 Monsanto Company Increasing dressing percentage and carcass weight in finishing beef cattle
US6443333B1 (en) * 1994-09-13 2002-09-03 Arthur Vanmoor Caulking cartridge with afterflow prevention and improved purging of cartridge contents
US5582331A (en) * 1995-09-13 1996-12-10 Van Moerkerken; Arthur Caulking gun and cartridge with afterflow prevention
NL9401492A (nl) * 1994-09-13 1996-04-01 Arthur Van Moerkerken Methode en onderdeel om navloeien van tubes te voorkomen.
US5680967A (en) * 1996-09-13 1997-10-28 Courtaulds Aerospace, Inc. Dispensing cartridge
US6899028B2 (en) * 1999-12-15 2005-05-31 Riso Kagaku Corporation Container
US6892904B2 (en) * 2003-04-22 2005-05-17 Karen Osborn Grouting gun apparatus and method
US8534505B2 (en) * 2008-09-15 2013-09-17 Nordson Corporation Liquid material dispenser
DE102008063502A1 (de) * 2008-12-17 2010-06-24 Fischbach Kg Kunststoff-Technik Auspresswerkzeug
CA2690171A1 (fr) * 2009-02-11 2010-08-11 Sulzer Mixpac Ag Piston de cartouche a event
EP2794124A1 (fr) 2011-12-21 2014-10-29 The Sherwin-Williams Company Pistolet à calfeutrer avec mécanisme sans fuite
US10711944B2 (en) * 2016-01-15 2020-07-14 Gree-See Technology, Llc Grease gun cartridge construction
JP7094906B2 (ja) * 2019-02-15 2022-07-04 三菱重工業株式会社 流動性材料吐出装置
WO2025149764A1 (fr) 2024-01-09 2025-07-17 Fazekas Gabor Cartouche, élément d'épaulement et son procédé de fabrication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1263356A (fr) * 1960-04-28 1961-06-09 R C Can Co élément de fermeture flexible et plongeur pour cartouche de pistolet distributeur
FR2097755A5 (fr) * 1970-07-09 1972-03-03 Fischbach A Kg
EP0152373A2 (fr) * 1984-02-16 1985-08-21 HILTI Aktiengesellschaft Piston de pression pour récipients

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933221A (en) * 1957-02-28 1960-04-19 Gibson Homans Company Dispensing gun structure
US3029985A (en) * 1959-02-24 1962-04-17 G & K Machine Co Inc Flow control plunger
US3752367A (en) * 1972-06-26 1973-08-14 E Sundholm Plunger assembly for hand-operated grease gun
US4022355A (en) * 1976-03-26 1977-05-10 George Sabaka Cartridge for containing and dispensing viscous material
DE3148490C2 (de) * 1981-12-08 1986-02-13 Alfred Fischbach Kg Kunststoff-Spritzgusswerk, 5250 Engelskirchen Bodenverschluß für einen hohlzylindrischen Strangpreßbehälter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1263356A (fr) * 1960-04-28 1961-06-09 R C Can Co élément de fermeture flexible et plongeur pour cartouche de pistolet distributeur
FR2097755A5 (fr) * 1970-07-09 1972-03-03 Fischbach A Kg
EP0152373A2 (fr) * 1984-02-16 1985-08-21 HILTI Aktiengesellschaft Piston de pression pour récipients

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7353972B2 (en) 2003-09-10 2008-04-08 Heraues Kulzer Gmbh & Co. Kg Sealing piston for cartridges with de-aeration and barrier properties
DE102005007055A1 (de) * 2005-02-15 2006-08-24 Kettenbach Gmbh & Co. Kg Vorrichtung zum Ausbringen von Ein- oder Mehrkomponentenmassen und Kolben hierfür
WO2009068311A1 (fr) 2007-11-28 2009-06-04 Inatec Gmbh Plaque de raclage de piston pour dispositifs d'éjection pour générateurs de colle à chaud et générateur de colle à chaud pourvu d'une telle plaque
US8496140B2 (en) 2007-11-28 2013-07-30 Illinois Tool Works, Inc. Piston wiper plate for pressing units for melting systems for bags and melting system for bags provided with said piston wiper plate
CN101925412B (zh) * 2007-11-28 2013-09-11 伊利诺斯工具制品有限公司 用于袋熔化器的挤压装置的活塞式脱料板以及设有其的袋熔化器
CN111517013A (zh) * 2020-06-04 2020-08-11 沈阳吉畅科技有限公司 基于物联网的化工产品生产过程终端控制装置
CN115502035A (zh) * 2021-06-07 2022-12-23 万润科技股份有限公司 液室机构及液材挤出装置
CN115502035B (zh) * 2021-06-07 2023-06-02 万润科技股份有限公司 液室机构及液材挤出装置

Also Published As

Publication number Publication date
US4834268A (en) 1989-05-30
JPS63221867A (ja) 1988-09-14
DE3860957D1 (de) 1990-12-13
EP0281755B1 (fr) 1990-11-07
JPH067940B2 (ja) 1994-02-02
ES2019410B3 (es) 1991-06-16

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