EP0281755B1 - Cartouche-distributrice à piston refoulant - Google Patents

Cartouche-distributrice à piston refoulant Download PDF

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Publication number
EP0281755B1
EP0281755B1 EP88101393A EP88101393A EP0281755B1 EP 0281755 B1 EP0281755 B1 EP 0281755B1 EP 88101393 A EP88101393 A EP 88101393A EP 88101393 A EP88101393 A EP 88101393A EP 0281755 B1 EP0281755 B1 EP 0281755B1
Authority
EP
European Patent Office
Prior art keywords
piston
plunger
wall
cartridge
annular groove
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.)
Expired - Lifetime
Application number
EP88101393A
Other languages
German (de)
English (en)
Other versions
EP0281755A1 (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
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the 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
    • B05C17/01—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.
  • the storage cylinder of the cartridge - usually designed as a thin-walled disposable part made of plastic - "breathes" when it is discharged, i.e.
  • 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 head between the plunger plate and the contents is elastically deformed during the plunger advance, i.e. partially flattened to press the sealing lip radially against the cartridge wall during advance and then 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.
  • 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. This ensures that immediately after the piston has been relieved, the internal pressure of the cartridge is completely reduced thanks to sufficient axial volume expansion by the retreating piston before the cartridge content can flow through the mouth.
  • the "breathing" of the cartridge as such is not prevented - for example by increased wall thickness or other, costly stiffening of the cartridge cylinder - but its undesirable effects are simply eliminated.
  • 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.
  • a precise measurement of the cross-sectional deformation (crushing) of the sealing ring between the loaded (feed) and unloaded state is due to predetermined, local deformation of the annular groove possible.
  • 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 retract the discharge valve or discharge rods to a certain extent after each feed step 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 gradually advance the delivery piston 10 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 counter pressure of the cartridge contents 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 two separate bearing areas 16 and 17 guarantee, on the one hand, a limited and precisely defined deformation of the piston body and thus of the ring 11, and on the other hand, when the feed is pushed, the ram force is introduced directly onto the rigid piston head 12 via the second support 17, i.e. the bottom 12 is supported on the plunger 19 via the surface 17.
  • 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 circumstance enables the piston to be sufficiently retracted towards the tappet when the tappet is relieved. Because then the piston head 12 is rigid and the respective deformation of the piston body is precisely defined, there is a precise relationship between the ram stroke and 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 delivery plunger 20 provided with piston crown 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 provided on the piston crown 22. About this additional support then the forward stroke of the deformed delivery piston (lower half in Fig. 2) 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, piston wall 34, annular groove 38 and sealing ring 31 are designed similarly to the example according to FIG. 2.
  • the groove cross section is narrowed and the ring 31 is pinched by axial Displacement of the one flank formed on the piston wall 34 in that 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 pushing portion 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)
  • Coating Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Claims (6)

1. Cartouche distributrice comprenant au moins un cylindre réservoir (3) et un piston de refoulement (10, 20, 30) guidé dans ce cylindre, qui comprend un corps de piston formé d'un fond de piston (12, 22, 32) et d'une paroi ou jupe de piston (14, 24, 34), ainsi que des organes d'étanchéité (11, 21, 31) qui glissent le long de la paroi du cylindre, ce piston étant destiné à avancer par pas successifs sous l'action d'un poussoir de distribution (19, 29, 39), des parties du corps du piston pouvant se déformer élastiquement sous l'effet de l'action du poussoir, caractérisée en ce qu'une bague d'étanchéité (11, 21, 31) est logée dans une gorge annulaire (18, 28, 38) qui fait suite au fond rigide (12, 22, 32) du piston, et la section transversale de la gorge annulaire peut se déformer, avec écrasement de la bague d'étanchéité, pour laisser le piston de refoulement (10, 20, 30) reculer en sens inverse de l'avance lorsque le poussoir (19, 29, 39) est relâché.
2. Cartouche distributrice selon la revendication 1, caractérisée en ce que la paroi ou jupe (14, 34) du piston peut se déplacer en translation axiale vers le fond (12, 32) du piston avec un flanc de la gorge annulaire (18, 38) qui est formé sur cette paroi.
3. Cartouche distributrice selon la revendication 2, caractérisée en ce que la paroi ou jupe (14) du piston est reliée au fond (12) du piston par une membrane (15) qui est séparée du fond (12) du piston par une fente radiale (13).
4. Cartouche distributrice selon la revendication 2, caractérisée en ce que le fond (33) de la gorge annulaire (38) est flexible et relie la paroi ou jupe (34) du piston au fond (32) de ce piston.
5. Cartouche distributrice selon la revendication 1, caractérisée en ce que le fond (23) de la gorge annulaire (28) peut se déformer radialement.
6. Cartouche distributrice selon une des revendications précédentes, caractérisée en ce que le fond (22, 32) du piston, ou bien un cylindre d'appui (12a) qui part de ce fond, forme une surface de portée (17, 27, 37) attaquée par le poussoir (19, 29, 39) et qui limite la déformation.
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 EP0281755A1 (fr) 1988-09-14
EP0281755B1 true 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1514611A2 (fr) 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent

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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
DE59207301D1 (de) * 1991-01-29 1996-11-14 Wilhelm A Keller Austragkartusche mit Vorratszylinder und Foerderkolben
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
US5595752A (en) * 1994-07-01 1997-01-21 Monsanto Company Increasing dressing percentage and carcass weight in finishing beef cattle
US5672357A (en) * 1994-07-01 1997-09-30 Monsanto Company Method and device for implantation of large diameter objects in bovines
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
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
DE102005007055A1 (de) * 2005-02-15 2006-08-24 Kettenbach Gmbh & Co. Kg Vorrichtung zum Ausbringen von Ein- oder Mehrkomponentenmassen und Kolben hierfür
DE202007016706U1 (de) 2007-11-28 2009-04-09 Inatec Gmbh Kolbenabstreifplatte für Auspresseinrichtung für Beutelschmelzer sowie damit verbundener Beutelschmelzer
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
CA2859766C (fr) 2011-12-21 2016-10-04 The Sherwin-Williams Company Pistolet a calfeutrer avec mecanisme 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
CN111517013B (zh) * 2020-06-04 2024-09-24 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
TWI775476B (zh) * 2021-06-07 2022-08-21 萬潤科技股份有限公司 液室機構及液材擠出裝置

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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
FR1263356A (fr) * 1960-04-28 1961-06-09 R C Can Co élément de fermeture flexible et plongeur pour cartouche de pistolet distributeur
DE2034047C2 (de) * 1970-07-09 1972-03-30 Alfred Fischbach KG Kunststoff-Spritzgußwerk, 5252 Ründeroth Als Ausdrückkolben für plastische Masse dienender Verschluss aus elastischem Werkstoff für einen hohlzylindrischen Strangpressbehälter
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
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1514611A2 (fr) 2003-09-10 2005-03-16 Heraeus Kulzer GmbH Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent
DE10342090B4 (de) * 2003-09-10 2007-06-06 Heraeus Kulzer Gmbh Verschlusskolben für Kartuschen mit Entlüftung und Barriereeigenschaften

Also Published As

Publication number Publication date
DE3860957D1 (de) 1990-12-13
ES2019410B3 (es) 1991-06-16
US4834268A (en) 1989-05-30
JPH067940B2 (ja) 1994-02-02
EP0281755A1 (fr) 1988-09-14
JPS63221867A (ja) 1988-09-14

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