EP0580547B1 - Embouchure pour dispositif d'extraction pour des masses comportant deux composants - Google Patents

Embouchure pour dispositif d'extraction pour des masses comportant deux composants Download PDF

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Publication number
EP0580547B1
EP0580547B1 EP93810389A EP93810389A EP0580547B1 EP 0580547 B1 EP0580547 B1 EP 0580547B1 EP 93810389 A EP93810389 A EP 93810389A EP 93810389 A EP93810389 A EP 93810389A EP 0580547 B1 EP0580547 B1 EP 0580547B1
Authority
EP
European Patent Office
Prior art keywords
component
mouthpiece
outlet opening
tube
squeezing
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
EP93810389A
Other languages
German (de)
English (en)
Other versions
EP0580547A1 (fr
Inventor
Volker Kopp
Werner Moser
Jürgen Kortenkamp
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0580547A1 publication Critical patent/EP0580547A1/fr
Application granted granted Critical
Publication of EP0580547B1 publication Critical patent/EP0580547B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/918—Counter current flow, i.e. flows moving in opposite direction and colliding

Definitions

  • the invention relates to a mouthpiece for extrusion devices which serve to dispense two-component masses, according to the generic preamble of patent claim 1.
  • An extrusion device for two-component compositions is known, for example, from CH-PS 670 580.
  • such a device usually has a dispensing nozzle which is provided with an outlet opening for one component each.
  • the individual components are separated from each other inside the device and enter a mouthpiece through the respective outlet openings, which is connected to the device-side dispensing nozzle.
  • the two components are mixed within the mouthpiece, which is decisive for the final hardening.
  • the individual components are pressed out by applying a certain pressure generated in the device.
  • a print can be applied manually or with additionally supplied print media. If such pressure is applied without -
  • a mouthpiece with hardened components is removed prematurely, there is a risk that one of the components will strike back through the outlet opening of the other component into the extrusion device.
  • the components can be mixed within the extrusion device, so that curing takes place, for example, in the area of the extrusion mechanisms, which can lead to malfunctions in the extrusion device.
  • Such a fault is only possible by time-consuming dismantling and cleaning of the dispenser.
  • the components are kicked back arbitrarily, mostly depending on the viscosity differences and any pressure differences between the individual components.
  • GB-A-2 029 716 describes a generic mouthpiece in which a tube piece opens into a connecting tube to a mixing chamber.
  • the connecting pipe is used to supply one component.
  • the second component is introduced into the first component flowing past.
  • the two components are then transported together into an mixing chamber by an extension of the connecting pipe.
  • the pipe section is equipped with a one-way valve for the passage of the second component into the first component.
  • the outlet opening of the one-way valve is arranged in such a way that the flow direction of the second medium at the outlet of the one-way valve corresponds to the main direction of flow of the first medium.
  • the actual mixing of the two components should only take place in the connected mixing chamber. This is to prevent the two components from mixing and hardening already in the area around the one-way valve, because it should be possible at any time to dismantle the pipe section which is passed through the connecting tube at one knee area and fastened there with the one-way valve.
  • This known mouthpiece is intended for larger stationary systems and can only be used in connection with a connected mixing chamber.
  • FR-A-2 074 037 describes a mixing device for a plurality of components comprising an outer tube, in which at least one of the components is introduced through a coaxially arranged tube piece which is equipped with a one-way valve at its mouth.
  • the one-way valve comprises an axially arranged, prestressed membrane-like disk which closes the axial opening of the pipe section. Due to the pressure of an outflowing component, the membrane-like disc is raised in the edge region and opens a passage gap through which the component exits the medium flowing past at approximately a right angle. The membrane is opened in the main flow direction of the medium. As a result, there is always a risk that part of the medium will enter through the passage gap.
  • the invention has for its object to provide a mouthpiece for a squeezing device of the type described above, with which it is avoided that malfunctions caused by a kickback of component parts in the squeezing device occur.
  • the object is achieved in that the outlet of the one-way valve is arranged such that the outflow direction of the second component is opposite to the flow direction of the first component.
  • the mouthpiece with at least one one-way valve which cooperates with one of the outlet openings, has the consequence that at least one of the two components must first pass through the one-way valve and then mixed with the other component in the mixing tube.
  • the one-way valve only opens as long as the component flows through. As soon as the squeezing pressure is removed, the one-way valve closes, so that no further portion of the component can escape and, moreover, no portion of the other component comes from the mixing tube to the outlet opening assigned to the one-way valve.
  • This mouthpiece according to the invention is also a disposable part, which has to be removed from the pressing device after the pressing process has been interrupted. For the satisfactory functioning of the further squeezing process, it is necessary as before to provide the dispensing nozzle of the squeezing device with a new mouthpiece.
  • a one-way valve is expediently arranged at a distance from the connection point to a first outlet opening on a pipe section which is mounted coaxially in the mixing tube and can be connected to the corresponding outlet opening. It is thereby achieved that the two outlet openings on the device side are separated from one another, which is particularly advantageous if only one of the outlet openings interacts with a one-way valve. Only after the component passing through the pipe section has also passed through the one-way valve is it mixed with the other component located in the mixing pipe.
  • the pipe section is preferably arranged coaxially within the mixing pipe. This is the pipe section for the passage of one component and the annular space between the tube piece and the mixing tube are provided for the passage of the other component.
  • the annular space between the tube piece and the mouthpiece can at most be penetrated by ribs, which on the one hand serve to stabilize the tube piece, but on the other hand allow enough space for the passage of the one component between the tube piece and the mixing tube.
  • one or more openings on the pipe section that can be covered by an elastically deformable part are suitable as one-way valves.
  • These openings are advantageously radial passages which are arranged in the mouth region of the pipe section.
  • An elastically deformable part for these, for example, radially arranged passages is expediently an elastic sheath which surrounds the openings.
  • This elastic sleeve preferably has the shape of a tube.
  • the elastic sleeve is connected at its end area facing the mouth of the mixing tube to the mouth area of the pipe section and can be elastically deformed at its opposite end area by the pressure of the component flowing through the pipe section.
  • a quasi deflection baffle is thus formed for the component flowing through the pipe section, which on the one hand has an advantageous effect on the mixing process and on the other hand also has an advantageous effect on the closure to be formed by a proportion of hardened components.
  • a further one-way valve is expediently arranged in the area of the connection point to a second outlet opening.
  • this further one-way valve is arranged in the area of the connection point, there is still a spatial separation of the outlet points, ie in the present case the one-way valves.
  • the further one-way valve preferably has a bellows that is axially compressible by the pressure of the component flowing through the second outlet opening.
  • a bellows acts in the sense of an elastically deformable part analogous to the description in connection with the first one-way valve, only with the difference that the elastic bellows are axially deformable and the elastic sleeve is radially deformable. Due to the internal stress, the bellows covers the second outlet opening until compression occurs due to the pressure of the component flowing out through the outlet opening.
  • the mixing tube is advantageously made so long that the one-way valve or valves are sufficiently protruded from the mixing tube. This creates a sufficiently long mixing section, which guarantees sufficient mixing of the individual components.
  • the mouthpiece according to the invention is advantageously used in connection with an extrusion device which has a first outlet opening opening into the mixing tube and, upstream of this first outlet opening, coaxially in front of this first outlet opening and a second outlet opening opening into the tube section.
  • a device of this type can, for example, be designed in such a way that the outlet opening opening into the mixing tube is used for the delivery of prepolymer or similar resins and the outlet opening opening coaxially therewith is provided for the delivery of an activator.
  • the mouthpiece consists essentially of a mixing tube 1 and a tube piece 2.
  • the mouthpiece is connected to an extrusion device, the front part 3 of which is indicated by dash-dotted lines.
  • the front part 3 is indicated by a first outlet opening 3a (shown in the closed position) and a second outlet opening 3b upstream of this first outlet opening 3a coaxially in the squeezing direction.
  • the first outlet opening 3a opens into the squeezing tube 1 and the second outlet opening 3b opens into the pipe section 2.
  • the pipe section 2 is held and stabilized via ribs 4 in the mixing pipe 1. It is also shown how the pipe section 2 is provided with a bore 2a which tapers slightly in the pressing-out direction and which opens into radial passages 2b at its end pointing in the pressing-out direction. These passages 2b located in the mouth region of the pipe section 2 are surrounded by an elastic sheath 5. This elastic sleeve 5 is connected to the pipe section 2 at its end area facing the mouth of the mixing pipe 1, ie this end area is surrounded, for example, by projections 2c of the pipe section 2. The casing 5 can be clamped into the space formed by the projections 2c and, if necessary, additionally glued.
  • the envelope 5 is at its opposite end region radially expandable from the pressure of the component flowing through the pipe section 2, so that in this area the component emerging through the passages 2b can reach the mixing tube 1 after expansion of the casing 5 and mix there with the other component.
  • the end of the mixing tube 1 facing the dispenser can also be provided with one or more recesses distributed over the rear end face, for example in the form of notches 1a, so that 1 edges form on the rear end face of the mixing tube. These edges can be used to clean the respective area of the squeezing device by rotating the mixing tube 1 about its own axis so that residues of the individual components can be removed.
  • Fig. 2 shows another one-way valve for the second component.
  • the mouthpiece with its mixing tube 6 is connected to an extrusion device, the front part 7 of which is indicated by a dot-dash line.
  • the front part 7 is indicated with a first outlet opening 7a for the first component and a second outlet opening 7b - shown in the open position - for the second component, the first outlet opening 7a being arranged coaxially in the squeezing direction to the outlet opening 7b.
  • the first outlet opening 7a opens into a pipe section 8.
  • This pipe section 8 is provided with a bore 8a which tapers slightly in the direction of squeezing and which opens into radial passages at its end pointing in the direction of squeezing.
  • These passages located in the mouth area of the pipe section 8 are surrounded by an elastic cover.
  • the elastic sleeve can be radially deformed by the pressure of the component flowing through the bore.
  • the pipe section 8 is held and stabilized by means of ribs 8c which are supported on the mixing pipe 6.
  • the pipe section 8 In the area pointing counter to the pressing direction, the pipe section 8 is surrounded by a bellows 10. This bellows 10 axially covers the outlet opening 7b. The bellows 10 is axially compressed by the pressure of the component flowing through the outlet opening 7b, so that the component can emerge and flow in the pressing direction along the annular space between the bellows 10, the pipe section 8 and the mixing tube 6. In the area of the passages, the individual components flowing out of the passage openings 7a, 7b mix.
  • Plastic is a suitable material for the mixing pipe 1, 6 and the pipe section 2, 8.
  • the sleeve 5 and the bellows 10 are also advantageously formed from plastic, but from a highly elastic one.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating Apparatus (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Nozzles (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Formation And Processing Of Food Products (AREA)

Claims (10)

  1. Pièce d'embouchure pour des distributeurs de masses à deux composants, comprenant un tube de mélange (1, 6) qui est conformé pour le raccordement à une buse de distribution (3, 7) située du côté appareil et comportant deux ouvertures de sortie (3a, 3b; 7a, 7b) pour les différents composants, et une section de tube (2, 8) débouchant à l'intérieur du tube de mélange (1, 6), laquelle est entourée lors du fonctionnement par l'un des composants et dont la section d'embouchure comporte une soupape unidirectionnelle (2b, 5) pour le passage du second composant dans le courant du premier composant, caractérisée en ce que la sortie de la soupape unidirectionnelle (2b, 5) est disposée de telle façon que la direction de sortie du second composant est opposée à la direction d'écoulement du premier composant.
  2. Pièce d'embouchure selon la revendication 1, caractérisée en ce que la section de tube (2, 8) est montée coaxialement dans le tube de mélange (1, 6) et qu'elle peut être raccordée, conjointement avec le tube de mélange (1, 6), à la buse de distribution (3, 7) située du côté appareil, de sorte qu'une première ouverture de sortie (3a, 7b) communique avec le tube de mélange (1, 6) et que la seconde ouverture de sortie (3b, 7a) placée de préférence coaxialement en avant de la première ouverture de sortie (3a, 7b) de la buse de distribution (3, 7), communique avec la section de tube (2, 8).
  3. Pièce d'embouchure selon la revendication 2, caractérisée en ce que la soupape unidirectionelle comporte une ou plusieurs ouvertures qui peuvent être recouvertes par un élément élastiquement déformable.
  4. Pièce d'embouchure selon la revendication 3, caractérisée en ce que les ouvertures sont réalisées sous la forme d'ajours radiaux (2b) dans la région de l'embouchure de la section de tube (2).
  5. Pièce d'embouchure selon l'une des revendications 3 ou 4, caractérisée en ce que l'élément élastiquement déformable est constitué par une gaine élastique (5) qui enveloppe les ouvertures.
  6. Pièce d'embouchure selon la revendication 5, caractérisée en ce que la section terminale de la gaine élastique (5) dirigée vers l'embouchure du tube de mélange (1), est raccordée à la section d'embouchure de la section de tube (2), et que sa section terminale opposée peut être déformée élastiquement par la pression du composant qui parcourt la section de tube (2).
  7. Pièce d'embouchure selon l'une des revendications 1 à 6, caractérisée en ce qu'une soupape unidirectionnelle supplémentaire est disposée dans la région du raccordement vers une seconde ouverture de sortie (7b).
  8. Pièce d'embouchure selon la revendication 7, caractérisée en ce que la soupape unidirectionnelle supplémentaire comprend un soufflet (10) lequel peut être comprimé dans le sens axial par la pression du composant passant par la seconde ouverture de sortie (7b).
  9. Pièce d'embouchure selon l'une des revendications 1 à 8, caractérisée en ce que les soupapes à voie unique sont débordées axialement dans la direction de distribution par l'embouchure du tube de mélange (1).
  10. Pièce d'embouchure selon l'une des revendications 1 à 9, caractérisée en ce qu'elle est conformée en soupape unidirectionnelle qui peut être retirée du distributeur après une interruption prolongée de la distribution de la masse à deux composants et remplacée par une nouvelle pièce d'embouchure identique dès que la distribution est reprise.
EP93810389A 1992-07-24 1993-05-28 Embouchure pour dispositif d'extraction pour des masses comportant deux composants Expired - Lifetime EP0580547B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4224497A DE4224497A1 (de) 1992-07-24 1992-07-24 Mundstück für Auspressgeräte, die dem Abgeben von Zweikomponentenmassen dienen
DE4224497 1992-07-24

Publications (2)

Publication Number Publication Date
EP0580547A1 EP0580547A1 (fr) 1994-01-26
EP0580547B1 true EP0580547B1 (fr) 1996-06-19

Family

ID=6464022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810389A Expired - Lifetime EP0580547B1 (fr) 1992-07-24 1993-05-28 Embouchure pour dispositif d'extraction pour des masses comportant deux composants

Country Status (8)

Country Link
US (1) US5429277A (fr)
EP (1) EP0580547B1 (fr)
JP (1) JPH06154685A (fr)
AT (1) ATE139462T1 (fr)
CA (1) CA2101149C (fr)
DE (2) DE4224497A1 (fr)
DK (1) DK0580547T3 (fr)
ES (1) ES2088259T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69626297T2 (de) * 1995-09-25 2003-12-11 Robert Eric Montgomery Zahnbleichende zusammensetzungen
GB9711719D0 (en) * 1997-06-06 1997-08-06 Valsave Engineering Services L Fluid mixing
EP2258468B1 (fr) * 2009-06-05 2012-05-16 Ritter GmbH Système de mélange pour cartouche à deux composants
US8899446B2 (en) * 2010-04-28 2014-12-02 Integra Adhesives Inc. Apparatus for mixing and dispensing multiple flowable components
DE102011076443B4 (de) * 2011-05-25 2013-01-17 Lechler Gmbh Rückschlagventil für Sprühdüse und Düsenrohr
EP3023204A1 (fr) * 2014-11-21 2016-05-25 HILTI Aktiengesellschaft Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
AU2018273349B2 (en) * 2017-05-25 2023-06-08 GCP Applied Technologies, Inc. Expanding nozzle for component additions in a concrete truck, and method and system for use of same
DE102020103073B4 (de) 2020-02-06 2021-12-30 Frank Wolff Misch-Vorrichtung für Zweikomponentenkleber

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1445826A (en) * 1923-02-20 Milton a
US384306A (en) * 1888-06-12 Francois febnand bouedil
US1164350A (en) * 1914-10-08 1915-12-14 Jacob Fridrich Huber Dispensing apparatus.
US2503534A (en) * 1944-08-21 1950-04-11 Rover Co Ltd Liquid fuel injection means for internal-combustion engines
FR953482A (fr) * 1947-09-25 1949-12-07 Dispositif à ressort pour pulvérisation et mélange de fluides
US3015420A (en) * 1960-07-25 1962-01-02 Morris H Chudnow Double stroke variable control fluid dispensing valve
GB1003320A (en) * 1961-10-25 1965-09-02 Samuel Jones & Co Engineering Improvements in fire extinguisher discharge nozzles
DE1454790A1 (de) * 1963-11-05 1969-06-12 Bayer Ag Mischvorrichtung zur Herstellung von Kunststoffen
DE1963376A1 (de) * 1969-12-18 1971-06-24 Agfa Gevaert Ag Einrichtung zum Zugeben und Verteilen einer Fluessigkeit bzw. eines Gases in anderen Medien
DE2339927A1 (de) * 1973-08-07 1975-02-20 Peter Christiansen Rohwasserbeluefter fuer wasseraufbereitungsanlagen
US3908868A (en) * 1974-05-31 1975-09-30 Itt Liquid dispenser
GB2029716A (en) * 1978-09-04 1980-03-26 Crosby & Co Ltd Mixing reactive components in flow
JPS60168625A (ja) * 1984-02-13 1985-09-02 Ekuseru Kk 複合材質を備えた中空成形品の製造方法とその装置
CH670580A5 (fr) * 1987-04-16 1989-06-30 Ehrensperger C Ag
DE3802519C2 (de) * 1988-01-28 1994-10-06 Ladoco Ag Vorrichtung zur dosierten Abgabe von flüssigen oder fließfähigen, miteinander unter Bildung einer nichtfließfähigen Masse chemisch reagierenden Materialkomponenten
DE8900469U1 (fr) * 1989-01-17 1990-05-23 Espe Stiftung & Co Produktions- Und Vertriebs Kg, 8031 Seefeld, De
GB2256636A (en) * 1991-06-11 1992-12-16 Imi Cornelius Beverage dispense nozzle

Also Published As

Publication number Publication date
DK0580547T3 (da) 1996-11-04
DE59302992D1 (de) 1996-07-25
CA2101149C (fr) 2000-10-10
JPH06154685A (ja) 1994-06-03
DE4224497A1 (de) 1994-01-27
ES2088259T3 (es) 1996-08-01
EP0580547A1 (fr) 1994-01-26
US5429277A (en) 1995-07-04
ATE139462T1 (de) 1996-07-15
CA2101149A1 (fr) 1994-01-25

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