EP0213073B1 - Dispositif pour mélanger et appliquer des substances fluides ou pâteuses - Google Patents

Dispositif pour mélanger et appliquer des substances fluides ou pâteuses Download PDF

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Publication number
EP0213073B1
EP0213073B1 EP86810345A EP86810345A EP0213073B1 EP 0213073 B1 EP0213073 B1 EP 0213073B1 EP 86810345 A EP86810345 A EP 86810345A EP 86810345 A EP86810345 A EP 86810345A EP 0213073 B1 EP0213073 B1 EP 0213073B1
Authority
EP
European Patent Office
Prior art keywords
cartridges
cartridge
housing
piston
piston assembly
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
Application number
EP86810345A
Other languages
German (de)
English (en)
Other versions
EP0213073A1 (fr
Inventor
Theodor Stäheli
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.)
Novartis AG
Original Assignee
Ciba Geigy 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 Ciba Geigy AG filed Critical Ciba Geigy AG
Priority to AT86810345T priority Critical patent/ATE46837T1/de
Publication of EP0213073A1 publication Critical patent/EP0213073A1/fr
Application granted granted Critical
Publication of EP0213073B1 publication Critical patent/EP0213073B1/fr
Expired 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
    • B05C17/00503—Details of the outlet element
    • B05C17/00506—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container
    • B05C17/00513—Means for connecting the outlet element to, or for disconnecting it from, the hand tool or its container of the thread type
    • 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
    • B05C17/00503—Details of the outlet element
    • B05C17/00516—Shape or geometry of the outlet orifice or the outlet element
    • 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
    • B05C17/00553—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 means allowing the stock of material to consist of at least two different components
    • 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
    • B05C17/00553—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 means allowing the stock of material to consist of at least two different components
    • B05C17/00559—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 means allowing the stock of material to consist of at least two different components the different components being stored in coaxial chambers
    • 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
    • B05C17/0106—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 with means for longitudinally cutting container walls during relative displacement of the piston and its cooperating 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
    • B05C17/0116—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 characterised by the piston driving means
    • B05C17/012—Stepwise advancing mechanism, e.g. pawl and ratchets
    • B05C17/0123—Lever actuated
    • 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
    • B05C17/015—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 pneumatically or hydraulically actuated piston or the like
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/325—Containers having parallel or coaxial compartments, provided with a piston or a movable bottom for discharging contents
    • 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

Definitions

  • the invention relates to a device according to the preamble of patent claims 1 and 6.
  • Two different types of devices are known for squeezing and metered mixing of liquid or pasty masses from cartridges.
  • the first type e.g. B. by EP-A-0 119 847 and DE-A-2 521 392
  • it is multi-chamber cartridges with integrated ejection piston.
  • the second type e.g. B. by DE-A-3 128 611 and FR-A-2 501 080
  • the pistons are part of the device and not the cartridges.
  • the second type has fundamental advantages over the first.
  • Squeezing devices of the second type can in principle also be designed for higher squeezing pressures; among others they are therefore also more suitable for more viscous masses.
  • the invention relates to a device of the second type.
  • the devices of this type which have become known to date, could not meet higher requirements with regard to accuracy and constancy of the mixing ratio, or only to a certain extent with the acceptance of structural disadvantages, particularly when metered mixing of masses of very different viscosities.
  • a device is to be created which, in order to avoid mixing errors, has a reliable coupling of the piston arrangement which is also effective during work breaks, and which is characterized by a small space requirement. Furthermore, in order to reduce mixing errors to a minimum, the device should have means which only allow the substances to flow simultaneously. This object is achieved with regard to the coupling of the pistons by the features mentioned in the characterizing part of patent claim 1 and with regard to the inevitable simultaneity of the flow of the substances by the features mentioned in the characterizing part of patent claim 6.
  • Knives or web can be made so narrow that only low frictional forces can be overcome when cutting. Furthermore, piston rods are no longer required to transmit the coupling forces, so that they can be dispensed with entirely in pneumatic or hydraulic operation, for example.
  • the direct coupling of the piston parts according to the invention is simpler, more reliable and, moreover, also fully effective when the pistons are retracted.
  • the latter is particularly advantageous if the cartridges are emptied with an interruption, since it is inevitably ensured that all piston parts are always at the same level and that the dosage is always the same at the start of each new squeezing process.
  • Piston arrangements with knives are known per se in multi-chamber cartridges, but it is not the outer walls of the cartridges (as in the invention) but the intermediate walls that are cut there.
  • the intermediate wall is even cut out in its entirety (on both side edges) and rolled up behind the piston arrangement or deflected laterally.
  • this has a wide range Ren disadvantage of an increased power requirement to overcome the roll-up or deflection resistance.
  • the cartridges or their holder can only be moved into the front end position in the housing against a return spring.
  • the masses only flow out of the cartridges when the squeezing pressure has overcome the spring force of the opening mechanism.
  • the backward movement of the cartridges at the end of an application proves to be particularly advantageous. It causes suction at the mouth of the device and thus prevents the substances from dripping.
  • the housing of the device shown in FIG. 1 consists of a support tube 1, a front cover 11, which is fixed by a union nut 10 that can be screwed onto the support tube 1, and a rear screw-on closure cap 9.
  • a cartridge 2 is located inside the support tube 1 , which is double-walled.
  • An inner partition 7 defines a cylindrical space in which the one component, for example a resin, is introduced. This cylindrical space is referred to below as the central chamber 3.
  • a cylindrical annular space is formed from the intermediate wall 7 and an outer wall 35 of the cartridge 2, which is referred to below as the annular chamber 4.
  • the other component for example a hardener, is introduced into this annular chamber 4.
  • the two chambers 3 and 4 are delimited at the front by the front wall 33 of the cartridge 2.
  • the central chamber 3 is equipped with a round piston 5, and the annular chamber 4 with an annular piston 6.
  • the pistons 5 and 6 have sealing lips 8 at their edges.
  • the intermediate wall 7, which extends into the Cartridge mouth 13 is sufficient, dividing the latter into separate output channels 24 and 25, respectively.
  • a valve piece 14 is pushed into the cartridge mouth 13 and is explained in more detail with reference to FIGS. 2 and 3. This is clamped by means of a union nut 50 on an outlet connection 49 formed by the front cover 11.
  • a mixing nozzle 23 is attached to the mouth of the valve piece 14. The attachment is also carried out by means of the union nut 50.
  • On the front cover 11 there is also a front connecting piece 15 for the inlet of compressed air.
  • the cover 9 screwed onto the rear end of the support tube 1 contains a rear connection
  • Fig. 2 shows a perspective view of the valve piece 14. It is provided with two valve channels 28, 29, which are indicated by dashed lines, the inlet openings of which can still be seen in the figure.
  • the valve piece 14 is provided from the rear with a slot 27 into which the part 12 of the partition 7 located in the cartridge mouth 13 can be pushed. At the rear part of the valve piece 14 there are two sealing lugs 30.
  • valve slots 43 Adjacent to the sealing lugs 30, two valve slots 43 serve to admit the components into the valve channels 28, 29.
  • annular elevation 51 On the front shoulder of which the valve piece 14 is fastened to the outlet connection 49 by means of the union nut 50 (see in this respect Fig . 1).
  • the mixing nozzle 23 is fastened to the thread 32 by means of the union nut 50 (the latter is also shown in FIG. 1).
  • the front part of the valve piece 14 is closed off by a partition wall 26 which is explained in more detail below.
  • FIG 3 shows in an exploded view how the mixing nozzle 23 can be fastened on the valve piece 14 by means of the union nut 50.
  • the mixing nozzle 23 is designed at its rear end as an attachment 53, so that a liquid-tight contact is ensured between the valve piece 14 and the mixing nozzle 23.
  • the components to be processed are kept separate when passing through the interior of the attachment 53 through the partition wall 26 of the valve piece 14.
  • a multiplicity of mixing elements are located in a static mixing channel 52 of the mixing nozzle 23.
  • static means that there are no moving parts.
  • Fig. 4 shows the relative displacement between the valve piece 14 and the cartridge 2 when it is in the front position. It can be seen that the cartridge mouth 13 opens the valve slots 43 so that the substances in the cartridge chambers 3, 4 can easily get into the valve channels 28 and 29, respectively.
  • a changeover part 22 of a schematically illustrated three-way valve 21 is brought into position 1.
  • compressed air is conducted into the rear connecting piece 20 and the piston assembly 5, 6, 19 is pushed forward.
  • the cartridge 2 together with the piston assembly 5, 6, 19 is pushed forward until the cartridge front wall 33 comes to a stop on the front cover 11.
  • the rear part of the valve piece 14 reaches the interior of the two chambers 3 and 4 from the cartridge opening 13. This cartridge position is shown in a partial view according to FIG. 4.
  • the piston assembly 5, 6, 19 now also moves relative to the cartridge 2 and is pushed forward in it.
  • This movement is possible because the connecting elements between the pistons 5, 6 are designed as blades 19 and continuously cut the intermediate wall 7 of the cartridge 2. No substance can run out at the interface, since the blades 19 are arranged behind the piston surfaces facing the substances. Since the Patron 2 is only used once anyway, it is of no importance that the partitions are cut after use.
  • Due to the pressure of the piston assembly 5, 6, 19, the substances in the interior of the cartridge are pressed forward and pass through the valve slots 43 into the two valve channels 28 and 29 and from there into the mixing nozzle 23. There they are mixed in the mixing channel 52 and can pass through the Exit opening 45 are applied to the desired location.
  • the changeover part 22 goes to position 11 and compressed air is fed into the front connecting piece 15.
  • the front wall 33 is pressurized with compressed air and brings the cartridge 2 back into the rear position.
  • the valve slots 43 are covered again by the cartridge mouth 13.
  • the valve channels 28, 29 are sealed by the valve lugs 30 with their sealing lips against the cartridge chambers 3, 4. So no more substances can get into the mixing nozzle 23.
  • the cartridge 2 which is to be regarded as a disposable part, does not require a thread, which would make the manufacturing process very expensive.
  • the partition 7 in the cartridge 2 continues up to its mouth 13, is received by the slot 27 of the valve piece 14, the partition wall 26 of which up to the static mixing channel 52 of the mixing nozzle 23 ensures separation of the components.
  • the compressed air can be switched off again; the cartridge is locked in the rear position.
  • locking means not shown in the figure are to be provided.
  • locking notches in the cartridge wall for example, are suitable, into which the sealing caps 30 can snap.
  • a reduced pressure of the compressed air is sufficient to move the cartridge 2 backwards. This is particularly important when removing the cartridge 2. Otherwise, the cartridge 2 would be conveyed out of the support tube 1 like a bullet when the rear cover 9 was removed.
  • Disposable pressure bottles which can be used in a pressure range of 4 - 6 bar, are ideally suited as blowing agents.
  • highly viscous 2-component adhesive mixtures can be processed without any problems.
  • PBTB Polybutylene terephthalate
  • Polyethylene, polypropylene or polybutylene terephthalate are the most suitable materials for the cartridge 2 or at least its intermediate wall 7. These materials are not only very inexpensive and easy to cut, but are also characterized by high chemical resistance.
  • a handle 37 is built on the back of the cover 9.
  • the front part is identical to that of the pneumatic version, except that a return spring 34 is provided as the return element.
  • a toothed rack 36 for actuating the pistons 5, 6. This is moved forward by means of a pawl 40 which is fastened to an actuating lever 38.
  • a pawl 41 is provided on the rear part of the rack 36 .
  • a reset handle 39 On the rear part of the rack 36 there is a reset handle 39 and on the front part a stamp plate 46, which serves to distribute the pressure exerted by the rack 36 to the round piston 5 and, via the knife 19, also to the piston 6.
  • Pushing the actuating lever 38 moves the pawl 40 forward. As a result, it exerts pressure on the tooth shoulder 47 and the rack is moved forward until the pawl 40 leaves the tooth shoulder 47.
  • This feed movement is dimensioned such that the cartridge 2 is moved forward in the first part of the feed path until the valve slots 43 open into the interior of the chamber (cf. FIG. 4).
  • the second part of the feed path serves to allow the piston assembly 5, 6, 19 to penetrate a certain distance into the interior of the cartridge chambers 3, 4, so that a certain amount of substance is pressed into the mixing nozzle 23.
  • the return spring 34 presses the cartridge 2 backwards, so that the valve slots 43 are sealed again by the cartridge mouth 13.
  • a pawl 41 engages.
  • the transmission ratio of the pawl 40 to the pawl 41 is to be selected such that on the one hand the valve slots 43 are opened or sealed cleanly and on the other hand a sufficient amount of substance can be applied.
  • the rack 36 When inserting a new cartridge, the rack 36 must be brought fully back into the rear position.
  • the reset handle 39 is rotated by 90 °, so that the toothed rack 36 can no longer be blocked by the pawl 41, and then brought into a starting position by a pulling movement.
  • the openings of the cartridge mouth are as small as in the practical embodiment of the known device described at the beginning. Thanks to the advantageous design of the valve according to the present invention, the openings of the cartridge mouth can be provided sufficiently large to ensure better filling of the cartridges 2.
  • round-bottom pistons and the annular pistons can be provided with sealing sleeves on the compressed air side, which prevent the penetration of air into the resin or the hardener.
  • the housing consists of a housing tube 54 with a front closure cover 55 fastened by means of a union nut 57 and a rear closure cover 56 fastened by means of screws 90.
  • Two cartridges 58's are screwed with their threaded muzzle tubes 59 onto a cartridge carriage 60 arranged axially displaceably in the housing tube 54. This is provided with an O-ring 61 on its outer edge.
  • the cartridge opening leads into a borehole 63 which, after a short axial course, is directed radially against the central axis of the carriage 60 and opens at the wall of the central bore 62 in the carriage 60.
  • the valve piece 64 is slidably mounted in the bore 62 and screwed to a fastening cover 65 and secured by means of a lock nut 66.
  • the fastening cover 65 is in turn screwed onto the front closure cover 55.
  • the valve piece 64 has a valve head 68 at its rear end.
  • Two valve channels 69 open into the side wall of this valve head 68 and lead radially inward, in order then to run axially forward into a mixing nozzle 23 fastened to the front end of the valve piece 64.
  • a separating web 70 protruding at the front of the valve piece 64 extends into the mixing nozzle 23 and serves for better separation of the components before they enter the static mixing channel 52.
  • a holder H On the rear cover 56, a holder H is provided with an operating lever B for holding the press and for admitting the propellant gas. With the help of control lever B, a valve, not shown, is actuated for metering the drive gas.
  • a pressure gauge 87 for monitoring the pressure conditions can also be provided on a fastening part 86 on the rear cover 56.
  • the cartridges 58 - as provided in this exemplary embodiment - are already equipped with ejection pistons 71. These then serve as a rear closure for the cartridges during transport and storage. In this way it can be avoided that the usual sealing caps have to be exchanged for squeezing pistons. In the case of such manipulations, substances can flow out of the cartridge and reach unwanted places inside or outside the housing.
  • the pistons are in turn made up of several parts. Firstly, there are squeeze-out pistons 71 which can optionally be supplied with the cartridges. To actuate these squeezing pistons, drive pistons 72 ... 75 are provided; which are designed as drive parts 72, 74 on the parts directed against the driving air and on the parts which can be introduced into the interior of the chamber and directed against the drive pistons 71 as plunger parts 73.
  • the squeeze-out pistons 71 are disposable and are replaced when the cartridge is used up, while the drive pistons 72 ... 75 can be provided for repeated use.
  • the part which remains outside the cartridges and which is upstream of the drive part 74 serves as a sealing part 75, the function of which will be explained further below.
  • both the plunger parts 73 and the sealing part 75 are constructed separately from the corresponding drive parts 72 and 74 and are connected to these by screws 88.
  • the piston-coupling ring knife 80 can be conveniently inserted and, if necessary, easily replaced.
  • driving pistons 72 ... 75 i.e. Manufacture drive parts 72, 74, plunger parts 73 and sealing part 75 together with the knife as a blade / piston unit in one piece.
  • Thermoplastic with high compressive strength could be used as a material for this.
  • connecting piece 85 should also be mentioned, through which propellant gas can be let into the interior of the housing tube 54 for the purpose of resetting the drive pistons 72.
  • FIGS. 9a, 9b The drive pistons 72 ... 85 are shown in detail in FIGS. 9a, 9b.
  • Fig. 9a shows an exploded view of the drive piston 72 ... 85 in a separate construction and
  • Fig. 9b shows a corresponding longitudinal section.
  • the plunger part 73 is provided with a slot 76 for receiving the ring knife 80. On its circumference it has a radially directed sealing lip 77, which is somewhat upstream of the blade slot 76 in the direction of actuation of the pistons and whose function will be explained later.
  • One threaded hole 81 is used to receive a fastening screw 88 (see FIG. 10).
  • the bores of the sealing part 75 also each have a sealing lip 78. This is directed radially inward and is arranged such that they are offset in relation to the radially directed sealing lips 77 of the plunger part 73, in such a way that the sealing lips 78 of the sealing part 75, the sealing lips 77 of the tappet part 73 are somewhat upstream as seen in the actuation direction of the pistons.
  • the threaded holes 91 (FIG. 9a) in the sealing part 75, which are used for the connection to the drive part 74, should also be mentioned.
  • Fig. 10 shows a detailed view of the drive piston 72 ... 75 with inserted cartridge wall 58.
  • the plunger part 73 which is by means of a screw 88 on the cylindrical Drive part 72 of the inner drive piston 72, 73 is screwed tightly and is connected to the outer drive piston 74, 75 via the ring knife 80.
  • the radially directed sealing lip 77 prevents propellant gas from penetrating as far as the squeezing piston 71. Otherwise there would be the danger that the ejection piston 71 lying loosely on the plunger part 73 would be acted upon by the advancing propellant gas, would lift off the plunger part 73 and would travel a different distance than the other ejection piston 71. Then the compliance with the prescribed mixing ratio would no longer be guaranteed.
  • the sealing part 75 With its radially inwardly directed sealing lip 78, the sealing part 75 now exerts a counterpressure in the area between the plunger part 73 and the pressing-out piston 71 and in this way prevents the latter from being lifted off the cartridge wall 58.
  • the plunger part 73 has a Y-star-shaped slot 92 for receiving correspondingly arranged blades 89.
  • the plunger part 73 provided for the upper borehole 79 in the sealing part 75 is shown separately, while the other plunger part 73 is located in the corresponding lower borehole 79.
  • the knives 89 are secured by the drive parts 72, 74.
  • Fig. 12 shows an exploded view of the valve attachment.
  • Two cartridges 58 can be screwed to the cartridge carriage 60. In order to achieve a higher degree of tightness, this contains an O-ring 61 on its outer circumference.
  • the front closure cover 55 is fastened to the housing tube 54 with the union nut 57.
  • the front part of the valve piece 64 protruding from the cartridge slide 60 is provided with a thread 67 and is screwed onto the front cover 55 by means of the fastening cover 65 and secured by means of the locking nut 66.
  • a return spring 84 pushes the cartridge carriage 60 into the rear position.
  • Fig. 13 shows a representation of the drive piston 72 ... 75 when penetrating the cartridges 58. It can be seen that the cartridges 58 are cut when leaving the piston assembly 72 ... 75.
  • FIGS. 8a, 8b The mode of operation of this device can best be seen from FIGS. 8a, 8b:
  • the drive pistons 72 ... 75 When operating the control lever B, the drive pistons 72 ... 75 are acted on by propellant gas. The pressure exerted by the propellant gas on the drive pistons 72 ... 75 is transferred to the press-out pistons 71.
  • the area of the drive pistons 72 ... 75 is larger than that of the squeeze-out pistons 71 by the area of the outer drive pistons 74, 75, so that a pressure ratio corresponding to the ratio of the piston areas takes place.
  • FIGS. 14a and 14b offer a particularly inexpensive and easy-to-use solution.
  • the rear part of the piston press including the structure of the piston, is identical to the embodiment variants shown in FIGS. 8a ff.
  • the same reference numbers have also been used, so that there is no need to repeat the description in this regard.
  • the front part of the piston press and the cartridges differs significantly from the one shown so far.
  • valves 114 are integrated in the cartridges 58 and are guided there axially displaceably in the outlet tube 59 thereof.
  • the mouth pipes 59 are in turn also guided axially displaceably in a cartridge guide 103.
  • This is screwed onto a housing front part 100.
  • an annular flange 106 serves to secure the screw seat.
  • the front housing part 100 is fastened to the housing tube 54 by means of screws 101.
  • a union nut 108 which can be screwed onto the front end of the cartridge guide 103, clamps the end flange 107 of a mixing nozzle 23 at the front end of the cartridge guide 103.
  • a separating web 105 provided on the front of the cartridge guide 103 ensures that the components guided out of the cartridge guide 103 first come together in the static mixing channel 52 of the mixing nozzle 23.
  • a union nut 108 which is an additional component, a recess could also be provided in the front part of the cartridge guide 103 for snapping the mixing nozzle 23, so that it could be attached to the cartridge guide 103 like a bayonet.
  • the front part of the piston press is shown explosively in detail in FIG. 15.
  • the holes 104 in the cartridge guide 103 serve to receive the two outlet tubes 59 of the cartridges 58.
  • a return spring 84 presses the cartridge 58 backwards in the rest position.
  • Valves 114 are arranged in the outlet pipes 59, the valve heads 110 of which are fixed in a notch 102 in the rear cartridge position.
  • the longitudinal shaft 115 of a valve 114 is formed by three ribs arranged in a star-like manner with respect to one another.
  • valve webs 115 rest against the shoulder 107 of the mixing nozzle 23, which also serves as a support part for the valves 114, and the valve heads 110 are pressed into the interior of the cartridge.
  • This position, in which the valves 114 are open, is shown in Fig. 14a.
  • valves thus function as follows: In the rest position (FIG. 14 b), the cartridge 58 is in the rear position and the valve heads 110 are fixed in the notches 102. The device can be transported or stored. The valves are closed; the contents of the cartridge cannot leak.
  • valves 114 When compressed air is applied to the pistons (71 ... 75), the valves 114 are initially engaged in the orifices 59, i.e. closed (Fig. 14b). The cartridge content cannot flow out, so that the pressure acts on the cartridges 58 as a whole and sends them forward.
  • the valve stems 115 are supported on the shoulder 107 of the mixing nozzle 106 and cannot follow the cartridge movement. The valve heads 110 therefore get into the interior of the cartridges 58 during the cartridge movement.
  • the cartridges 58 have reached the front position (FIG. 14 a)
  • the cartridge contents are cleared into the mixing nozzle 23. This corresponds to the working position; the pressure acts as a squeezing pressure.
  • the return spring 84 presses the cartridges 58 back again into the rest position (FIG. 14b). At the same time, the excess pressure remaining in the interior of the cartridge presses the valves 114 forward, where the valve heads 110 snap back into the notches 102.
  • the pressure components cause the substance in the interior of the cartridge to exert pressure on the valve heads 110, drive them back into the orifices 59 and snap them into place.
  • the device according to the invention is also suitable for systems with more than two chambers.
  • a system with a cartridge carriage into which more than two cartridges can be inserted is very flexible, analogous to the embodiment variants shown in FIGS. 8 and 14.
  • These systems can be designed for a maximum number of screw-in or slide-in cartridges (for example, 9 of them), but depending on the application, only a part of the cartridges (for example, 3 of them) can be inserted into the cartridge carriage or the cartridge guide. It goes without saying that the unused cartridge spaces must be sealed.
  • the cartridges can also be arranged in the form of cartridge sets in which the cartridges are connected to one another in the vicinity of the cartridge mouths via a connecting flange (similar to that in FIG. 15). In this way, confusion when selecting and inserting individual cartridges of a cartridge set can be prevented.
  • the cylindrical cartridge body is divided into subchambers by one or more longitudinal dividing walls or dividing walls, as is shown, for example, in EP-A-0 119 847 mentioned at the beginning.
  • the blades only serve to prepare the partition wall by slitting in a suitable manner in such a way that it is rolled up with corresponding deformation means, or otherwise releases the actuation area of the piston drive or coupling means.
  • the pistons can be coupled directly via the blades, so that the deformation and coupling means are dispensed with and the usable space in the housing is saved. It is no longer a problem to transfer the embodiment principle shown in FIGS. 9a and 9b to an embodiment variant with longitudinal partition walls.
  • the outer drive piston contains, instead of two bores for two cartridges, only one bore for a single cartridge, even if it is divided into subchambers.
  • the squeezing pistons are now semicircular in accordance with the cross section of the subchambers and, according to the invention, are coupled via blades, as is shown in the previous exemplary embodiments. If the piston drive is on a pneumatic basis, a pressure ratio should be an advantage.
  • the outer drive piston has an annular shape, since the divided cartridge is best arranged in the center. A blade provided for coupling the pistons can in turn be inserted in a slot provided in the tappet and sealing part.
  • the pistons provided for the subchambers and the outer drive piston can be coupled with a straight, knife-like blade.
  • the arrangement principle for the valves shown in FIG. 14a can also be very easily transferred to the present case. Instead of two round, separately arranged chambers, one encounters two semicircular partial chambers that are only divided by a simple partition.
  • the cartridge outlet mouths are advantageously also arranged round and somewhat spaced. Instead of a round valve channel, semicircular or otherwise suitable shaped cartridge openings can also be provided. It should be emphasized once again that the piston coupling principle and the valve system can also be easily transferred to devices with cartridges divided into more than two subchambers.
  • both the piston coupling system and the valve arrangement according to the invention can be used for systems with only a single single-chamber cartridge.
  • the piston coupling system is used for pressure transmission if, for example, a viscous flowing substance is to be squeezed out and only a low propellant pressure is available for safety reasons. Thanks to the automatic valve system, open valves can also be a thing of the past with single-chamber systems.
  • both the piston coupling system and the valve system can be adapted to any cartridge shape.
  • the invention offers space for a large number of variations.
  • the piston it is not absolutely necessary for the piston to be coupled via the cutting means themselves.
  • cutting means which are unsuitable for the piston coupling such as, for example, particularly fine blades or wire prove to be particularly advantageous in certain applications
  • the coupling can also be carried out by means of a coupling flange arranged behind the cutting means.
  • the thickness of the coupling flange corresponds approximately to that of the cutting means, so that it can be easily passed through the slot created by the cutting means in the cartridge wall and does not produce any strong friction or inadmissible deformation of the wall parts adjacent to the slot.
  • valves due to the relative movement of the cartridges in relation to the housing ensures that they are only opened when there is sufficient squeezing pressure inside the cartridge.
  • valve heads integrated into the cartridge outlet pipes and snap back into place after each piston actuation allows a cartridge that has been started to be removed from the device and kept until it is reused, the valves 114 serving as front and the ejection pistons as the rear caps.
  • a cartridge change therefore only requires a simultaneous change of cartridge guide and mixing nozzle, both of which are to be regarded as disposable elements.
  • An electric spindle drive can also be used instead of propellant gas or a pawl drive. Since this is very cheap, a separate drive can also be provided for each cartridge chamber. In this case there is no need to connect the pistons by means of blades. When controlling the spindle drive, however, it must be ensured that the valves close again and can snap into the mouth of the cartridge. For this purpose, the spindle drive must either be automatically operated a few revolutions in the opposite direction at the end of a machining process or otherwise relieved - for example by lifting the spindle off the rack.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
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  • Package Specialized In Special Use (AREA)

Claims (17)

1. Dispositif pour chasser par pression et mélanger des substances liquides ou pâteuses partir de cartouches (58), comprenant un carter (54) avec une ouverture pour l'insertion des cartouches (58), des moyens pour le positionnement des cartouches (58) dans le carter (54) dans une position dans laquelle les orifices de sortie avant des cartouches communiquent avec des orifices dans la partie avant du carter, un agencement de pistons (5, 6, 19, 72, 73, 74, 75, 80, 88) accouplés mécaniquement, qui est mobile dans le carter (54) dans le sens longitudinal des cartouches, caractérisé par le fait que, pour la compression de cartouches (58) avec des parois extérieures en matière pouvant être découpée, l'agencement de pistons est pourvu de fentes continues pour les parois des cartouches (58), les fentes étant traversées dans la zone des parois des cartouches par un couteau (80) dont le tranchant est orienté en direction de la paroi des cartouches et est disposé, par rapport au mouvement de compression de l'agencement de pistons, au même niveau que les lèvres d'étanchéité (77) des pistons ou derrière celles-ci, et ce couteau et/ou une barrette étroite, disposée directement derrière le couteau et perpendiculaire au plan de coupe, reliant ensemble de manière stable les parties des pistons qui sont séparées par la fente continue.
2. Dispositif selon la revendication 1, caractérisé par le fait que l'agencement de pistons (5, 6, 19, 72, 73, 74, 75, 80, 88) est guidé dans le carter (54).
3. Dispositif selon la revendication 1 ou 2, caractérisé par le fait que le guidage de l'agencement de pistons (5, 6, 19,.72, 73, 74, 75, 80, 88) dans le carter (54) est étanche aux gaz et aux liquides et l'agencement de pistons est actionné de manière pneumatique ou hydraulique.
4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que sur des pièces voisines (73 et 75) de l'agencement de pistons sont disposées les lèvres d'étanchéité (77, 78), décalées les unes par rapport aux autres, les lèvres d'étanchéité (78), appliquées à l'extérieur contre les parois des cartouches, se trouvant de préférence avant les lèvres appliquées à l'intérieur.
5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'à l'avant, le carter (54) est pourvu d'un couvercle (100) amovible, pour l'insertion des cartouches (58).
6. Dispositif pour chasser par pression et mélanger des substances liquides ou pâteuses à partir de cartouches (58), comprenant un carter (54) avec une ouverture pour l'insertion des cartouches (58), des moyens pour le positionnement des cartouches (58) dans le carter (54) dans une position dans laquelle les orifices de sortie avant des cartouches communiquent avec des orifices dans la partie avant du carter, caractérisé par le fait que les moyens pour le positionnement des cartouches (58) sont constitués ou bien par une pièce de maintien (60) mobile dans le sens longitudinal entre deux positions terminales dans le carter (54), ou bien par une pièce de maintien (103) dans laquelle les cartouches sont montées mobiles entre deux positions terminales dans le sens longitudinal du carter, et que le carter (54) ou un couvercle (100), fermant le carter à l'avant, est équipé de moyens qui ouvrent les fermetures des cartouches dans la position terminale avant de la pièce de maintien (60) ou des cartouches (58).
7. Dispositif selon la revendication 6, caractérisé par le fait que la pièce de maintien (60) ou les cartouches (58) peut/peuvent être déplacée(s) jusqu'à leur position terminale avant par la force de compression des pistons, contre la force d'un ressort de rappel.
8. Dispositif selon la revendication 6, caractérisé par le fait que la pièce de maintien (60) ou les cartouches (58) peut/peuvent être déplacée(s) jusqu'à leur position terminale avant par la force de compression des pistons et rappelée(s) à partir de cette position terminale avant par des moyens pneumatiques ou hydrauliques.
9. Dispositif selon l'une des revendications 6 à 8, caractérisé par le fait que l'agencement de pistons (5, 6, 19, 72, 73, 74, 75, 80, 88) est guidé de manière étanche aux gaz dans le carter (54).
10. Dispositif selon l'une des revendications 6 à 9, caractérisé par le fait que la pièce de maintien (60) est guidée de manière étanche aux gaz dans le carter (54).
11. Dispositif selon les revendications 9 et 10, caractérisé par le fait que, entre la position terminale avant des pistons (73, 75) et la pièce de maintien (60), le carter présente un embout de raccordement (85) pour un agent d'actionnement pneumatique ou hydraulique, et que cet agent d'actionnement permet de pousser l'agencement de pistons (73, 74, 75, 80, 88) vers l'arrière, hors des cartouches (58) (vidées), contre la force de maintien des cartouches (58) dans la pièce de maintien (60).
12. Dispositif selon l'une des revendications 6 à 11, caractérisé par le fait que, pour des cartouches (58) dont la fermeture est constituée par une tête de soupape (110) avec une tige de soupape (115) orientée vers l'avant, l'extrémité avant du carter ou le couvercle fermant cette extrémité ou une pièce (107) reliée à cette extrémité au couvercle est réalisé(e) de telle manière qu'il/elle forme une butée (107) pour la tige de soupape (115), avant que soit atteinte la position terminale, et ouvre la soupape (110).
13. Dispositif selon la revendication 12, caractérisé par le fait que le logement étanche de la tête de soupape (110) est constitué par une encoche dans le tube d'embouchure (59) de la cartouche (58).
14. Dispositif selon l'une ou plusieurs des revendications précédentes, caractérisé par le fait que sur la partie avant du carter ou sur le couvercle (100) fermant cette partie est fixée, de façon à pouvoir être changée, une tuyère mélangeuse (23) qui communique directement ou par une pièce intermédiaire, également fixée de manière amovible, avec les tubes d'embouchure (59) des cartouches (58).
15. Dispositif selon l'une ou plusieurs des revendications précédentes, caractérisé par le fait que les cartouches (58) sont fabriquées en polyéthylène, polypropylène ou polybutylène-té- réphtalate.
16. Dispositif selon l'une ou plusieurs des revendications précédentes, caractérisé par le fait que l'agencement de pistons (5, 6, 19, 72, 73, 74, 75, 80, 88) est fabriqué en polybutylène- téréphtalate.
17. Dispositif selon les revendications 1 et 6 et selon l'une des revendications 7 à 16.
EP86810345A 1985-08-12 1986-08-06 Dispositif pour mélanger et appliquer des substances fluides ou pâteuses Expired EP0213073B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810345T ATE46837T1 (de) 1985-08-12 1986-08-06 Vorrichtung zum mischen und auftragen von fluessigen und/oder pastoesen substanzen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH345685 1985-08-12
CH3456/85 1985-08-12
CH193/86 1986-01-17
CH19386 1986-01-17

Publications (2)

Publication Number Publication Date
EP0213073A1 EP0213073A1 (fr) 1987-03-04
EP0213073B1 true EP0213073B1 (fr) 1989-10-04

Family

ID=25683830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810345A Expired EP0213073B1 (fr) 1985-08-12 1986-08-06 Dispositif pour mélanger et appliquer des substances fluides ou pâteuses

Country Status (3)

Country Link
US (1) US4690306A (fr)
EP (1) EP0213073B1 (fr)
DE (1) DE3665999D1 (fr)

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DE3665999D1 (en) 1989-11-09
US4690306A (en) 1987-09-01

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