EP4151322A1 - Cartouche coaxiale à armement intégré permettant de presser sans force de rappel une masse coulante à composants multiples - Google Patents

Cartouche coaxiale à armement intégré permettant de presser sans force de rappel une masse coulante à composants multiples Download PDF

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Publication number
EP4151322A1
EP4151322A1 EP21197871.3A EP21197871A EP4151322A1 EP 4151322 A1 EP4151322 A1 EP 4151322A1 EP 21197871 A EP21197871 A EP 21197871A EP 4151322 A1 EP4151322 A1 EP 4151322A1
Authority
EP
European Patent Office
Prior art keywords
cartridge
wall
reinforcement
coaxial
chamber
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.)
Pending
Application number
EP21197871.3A
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German (de)
English (en)
Inventor
Michael Wiedemann
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
Priority to EP21197871.3A priority Critical patent/EP4151322A1/fr
Priority to US17/933,282 priority patent/US20230087866A1/en
Publication of EP4151322A1 publication Critical patent/EP4151322A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B05C17/00553—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

Definitions

  • the invention relates to a coaxial cartridge which is designed to receive and store a first and a second component of a free-flowing multi-component mass in separate coaxial chambers and to press this mass out of the cartridge. Even if the explanation of the invention here usually only mentions these two chambers for two components, further (partial) chambers for other components of the multi-component mass can always be provided inside the cartridge.
  • Various cartridge concepts are known in the state of the art in order to accommodate at least two components of free-flowing masses in separate chambers, which can be dispensed by means of a dispensing device.
  • a distinction is made between coaxial cartridges and cartridges or foil packs with individual cartridges or foil bags arranged next to one another for the various components of a multi-component mass.
  • the multi-component mass can be, for example, a sealing or fastening mass such as mortar, adhesive and much more.
  • suitable support structures for the cartridges, into which the cartridges for the squeezing process are inserted are to be used in most cases. These support structures absorb the pressure of the cartridges during the squeezing process and prevent elastic expansion of the cartridges, which are usually made of plastic and would therefore yield to high pressure during the squeezing process without the support structure.
  • Thick-walled coaxial cartridges made of plastic usually only show elastic expansion in the outer wall of the cartridge during the squeezing process due to an almost equally high pressure in both chambers and an overpressure compared to the atmospheric pressure prevailing outside the cartridge. This can lead to undesired pumping behavior of the cartridge, which leads to mixing problems and a corresponding lack of hardening behavior of the mass:
  • the outer wall of a thick-walled plastic cartridge elastically expands radially during the squeezing process, restoring forces arise therein.
  • the squeezing process is interrupted, for example when moving to the next borehole, when several boreholes are to be filled in succession with the contents of the cartridge, these can lead to uneven pumping behavior in the cartridge, which is caused by the elastic restoring forces mentioned.
  • the pressure in the outer chamber of the cartridge is relieved after an interrupted squeezing process either by the components contained therein flowing out through the cartridge outlet or by relieving the pressure on the outer piston arranged in this chamber. This creates a piston offset in relation to the inner chamber, which leads to corresponding mixing problems during the subsequent pressing process.
  • a suitable support structure should be used to prevent elastic deformation of the outer wall during the squeezing process can.
  • This support structure would have to fit as closely as possible to the cartridge in order to limit the possible pump volume to a minimum:
  • the outer piston can only move back according to the volume of any annular gap between the support structure and the outer wall of the cartridge, because the outer wall of the cartridge moves could only expand elastically within this annular gap during the squeezing process. It is also important to ensure that the support structure is sufficiently rigid in order to avoid pumping due to deformation of the support structure itself.
  • Identical diameters i.e. the inner diameter of the support structure is the same as the outer diameter of the cartridge
  • identical diameters prevent easy insertion and removal of the cartridge into/from the support structure.
  • This in turn requires a slightly larger inner diameter of the support structure compared to the outer diameter of the cartridge, i. H. the above-mentioned annular gap between the cartridge and the support structure, which promotes the disruptive pumping behavior.
  • Pumping is a major challenge, especially with large-volume cartridges and containers.
  • a coaxial cartridge for storing a free-flowing multi-component mass and for dispensing (by squeezing) this mass out of the cartridge.
  • the cartridge can—but does not necessarily have to—be designed for insertion into a suitable support structure for the squeezing process.
  • the multi-component mass comprises at least a first component and a second component, which are stored separately from one another in the cartridge and are only to be mixed with one another when they are dispensed from the cartridge.
  • This can in particular be a sealing or fastening compound such as mortar, adhesive and the like.
  • the cartridge comprises a hollow-cylindrical inner wall and a hollow-cylindrical outer wall arranged coaxially (i.e. with the same cylinder axis) around it, so that the cartridge has an inner chamber delimited radially by the inner wall for receiving the first component of the multi-component mass and one arranged radially between the inner wall and the outer wall Having outer chamber for receiving the second component of the multi-component mass.
  • the cartridge On one of its two (in the axial direction) opposite end faces, the cartridge has a cartridge front wall, which delimits the inner chamber and the outer chamber in the axial direction and has a discharge opening for the first component in the area of the inner chamber and a discharge opening for the second component in the area the outer chamber having.
  • the front wall of the cartridge can in particular be firmly connected to the inner and outer walls of the cartridge.
  • it can be designed in one piece with the inner and/or outer wall, for example, or it can be fastened to it in the form of a separately manufactured cartridge cover.
  • the cartridge comprises an inner piston which closes the inner chamber at the rear (i.e. towards the other end side of the cartridge) and can be moved axially therein, and an outer piston which also closes the outer chamber at the rear and can be moved axially therein.
  • the inner wall and/or the outer wall of the cartridge can be designed to be dimensionally stable, for example thick-walled, so that it radially supports the inner piston and the outer piston and thereby guides them during their axial movement.
  • the cartridge also comprises an integrated armor embedded inside the outer wall or fixed to its surface and having a plurality of rings closed or at least overlapping circumferentially of the outer wall, or a plurality of turns forming a spiral around the cylinder axis.
  • These rings or spiral windings are made of a material that is stable against tensile stresses, such that the reinforcement can absorb tensile loads in the circumferential direction of the outer wall and thus prevent radial expansion or an increase in diameter of the outer wall during a pressing process.
  • One idea of the present invention consists in providing a coaxial cartridge, which is slightly smaller in diameter than a support structure used for the squeezing process, in order to facilitate the insertion of the cartridge into the support structure.
  • the cartridge has an integrated reinforcement, through which a pumping behavior of the cartridge based on elastic restoring forces in the support structure can be significantly reduced or even eliminated.
  • the reinforcement can be injected into the outer wall of the cartridge or glued around the cartridge like a label.
  • the cartridge and its integrated reinforcement - ie the mentioned material of the rings or the spiral windings and their number and distribution along the outer wall of the cartridge - are selected and designed in such a way that the shape and dimensions of the outer wall when the mass is pressed out of the cartridge remain largely unchanged as a result of axial displacement of the inner and outer pistons (referred to herein as the squeezing process).
  • the integrated reinforcement of the cartridge in this embodiment is designed to prevent any deformation (ie including elastic deformation) of the outer wall under pressure acting from the inside during the squeezing process.
  • an external support structure of the type mentioned at the outset for the squeezing process can be dispensed with.
  • the multiple rings or spiral windings are evenly distributed over an entire axial length of the outer wall.
  • the reinforcement can absorb tensile stresses acting in the circumferential direction evenly over the entire length of the cartridge and over the entire duration of the squeezing process, in order to prevent deformation of the cartridge.
  • the reinforcement has a fabric made of the material mentioned that is stable against tensile stresses.
  • the several rings or spiral windings which run mainly in the circumferential direction of the outer wall, form part of the fabric structure.
  • the fabric includes further material strands, threads or strips that run transversely thereto (for example mainly in the axial direction of the cartridge) and in any way with the rings or spiral windings can be intertwined. In this way, the overall stabilizing effect of the reinforcement can be increased and additionally achieved in the axial direction.
  • At least the outer wall of the cartridge is produced by injection molding (e.g. made of plastic) or by another casting process (e.g. made of metal).
  • the reinforcement can be embedded inside the outer wall by being cast or injected therein.
  • the reinforcement can include rings that are closed in the circumferential direction of the cartridge or spiral windings that merge into one another without interruption, in order to prevent a radial expansion of the outer wall over its entire circumference in a particularly uniform and reliable manner.
  • the reinforcement can also be attached to an outer or inner surface of the outer wall.
  • the cartridge can also be equipped with the reinforcement later, for example after it has been produced using a conventional and/or particularly favorable or simple production method.
  • the reinforcement can be embedded, for example, in a layer or foil (made of plastic or metal, for example), which is applied, for example glued, to the inside or outside of the outer wall of the cartridge.
  • a layer or foil made of plastic or metal, for example
  • the thickness of the layer or film mentioned there are no limiting requirements for the thickness of the layer or film mentioned, except that it must be sufficient to hold the reinforcement together and to fasten it to the outer wall of the cartridge.
  • said layer or film is attached to the cartridge with an overlap in the circumferential direction, so that the multiple rings are also attached of the reinforcement each overlap in the circumferential direction by extending in the circumferential direction into mutually attached overlapping portions of said layer/foil and thereby having overlapping ends.
  • a radial expansion of the outer wall can be prevented uniformly and reliably over its entire circumference.
  • the said layer or film is glued to the outside of the cartridge and designed as a label that, in addition to the reinforcement, carries predetermined identification elements (such as barcodes, chips, etc.) for identifying or writing on the cartridge.
  • predetermined identification elements such as barcodes, chips, etc.
  • the reinforcement can be integrated in a sales label that has to be applied to the cartridge anyway.
  • the mentioned material of the rings or the spiral windings can be or include aramid, glass fiber or carbon fiber.
  • any other material that is stable against tensile stresses such as natural or plastic fibers, metal wire and much more in the form of individual fibers, threads, strands, strips or fabric structures can be used, the strength and stability of which are used to reinforce the outer wall Protection against elastic expansion during the squeezing process is to be chosen appropriately.
  • the wall thicknesses of the inner wall and the outer wall are also dependent on specific circumstances such as material, pressurization, overall size of the cartridge, etc. to be selected appropriately for the functionality described herein.
  • the inner wall and the outer wall of the cartridge can each have a circular cross-section. However, this is not absolutely necessary for the functional principle presented here, so that in principle other cross-sectional shapes, such as elliptical or rectangular, are just as possible.
  • At least the inner wall and/or the outer wall of the cartridge can be made of plastic.
  • the entire cartridge can be made of plastic, with the individual components being made of can be the same or different types of plastic. In principle, however, other materials, such as metal, can also be used.
  • the cartridge front wall can have a connecting piece on its side facing away from the inner and outer chambers, into which the discharge openings of the inner and outer chambers open and which is designed for connecting a mixer for mixing the various components of the multi-component mass during the squeezing process.
  • a system for storing and dispensing a flowable multi-component mass comprises on the one hand a coaxial cartridge of the type presented here and on the other hand a support structure with an at least partially cylindrical receptacle on the inside, the shape and size of which are dimensioned for inserting and holding the cartridge for squeezing the multi-component mass out of it.
  • An intermediate space in the form of a substantially cylindrical annular gap remains between the inside of the receptacle of the support structure and the outer wall of the cartridge inserted therein, which simplifies the insertion of the cartridge into the support structure before the squeezing process.
  • an inner diameter of the cylindrical receptacle of the support structure is larger than an outer diameter of the outer wall of the cartridge by a predetermined double annular gap width.
  • the stated annular gap width is ideally just large enough to enable the cartridge to be inserted smoothly into the receptacle of the support structure.
  • this annular gap in the present system does not promote any disruptive resilience or pumping behavior of the cartridge during the squeezing process, because the reinforcement integrated in the cartridge elastic expansion of its outer wall is significantly reduced or even completely prevented.
  • the system can also include the mixer mentioned above, which is designed to be connected to the connecting piece of the cartridge front wall and to mix the various components of the multi-component mass during the squeezing process.
  • the mixer mentioned above, which is designed to be connected to the connecting piece of the cartridge front wall and to mix the various components of the multi-component mass during the squeezing process.
  • the first component from the inner chamber and the second component from the outer chamber are pressed outwards through the dispensing openings by simultaneous axial movement of the inner and outer pistons towards the front wall of the cartridge.
  • figure 1 1 shows an example of a system 1 of the type presented here in an axial longitudinal section, in which a coaxial cartridge 2 is inserted into a hollow-cylindrical receptacle 13 of a support structure 3 for squeezing out the multi-component mass contained therein.
  • the Coaxial cartridge 2 made of plastic. The same can also apply to the support structure 3 .
  • the cartridge 2 comprises a hollow-cylindrical inner wall 4 and a hollow-cylindrical outer wall 5 arranged around it with a common cylinder axis A, whereby an inner chamber 6 delimited radially by the inner wall 4 and an outer chamber 7 arranged radially between the inner wall 4 and the outer wall 5 are formed.
  • a first component of the multi-component mass to be discharged is accommodated in the inner chamber 6
  • a second component of the multi-component mass is accommodated in the outer chamber 7 (not shown).
  • the cartridge 2 comprises an inner piston 10 that closes the rear of the inner chamber 6 and can be moved axially therein, and an outer piston 11 that closes the rear of the outer chamber 7 and can be moved axially therein 1 to the right, the multi-component mass can be discharged from the cartridge 2 through the discharge openings of the cartridge front wall 8 (squeezing process).
  • the diameter of the coaxial cartridge 2 is slightly smaller than that of the support structure 3, so that a cylindrical annular gap 12 remains between the outer wall 5 of the cartridge and the cylindrical receptacle 13 of the support structure 3. which facilitates the insertion of the cartridge 2 into the receptacle 13.
  • the cartridge 2 has a reinforcement 14 integrated in/on its outer wall 5 (only in 2 and 3 shown) which reduces or completely prevents elastic expansion of the outer wall 5 into the annular gap 12 during the squeezing process, as a result of which the disruptive elastic restoring behavior (pumping) of the cartridge 2 can be reduced or even completely prevented.
  • FIGS. 2 and 3 show, each in a highly simplified schematic representation, two exemplary embodiments of a coaxial cartridge 2 of the type presented here, which differ in the design of the integrated reinforcement 14.
  • the cartridge 2 of 2 and 3 can in particular be part of the system 1 of 1 be where the in 2 and 3 axial longitudinal section shown opposite 1 is rotated 90° around the cylinder axis A, so that the in 1 clearly recognizable from the middle of the cartridge front wall 8 offset position of the connecting piece 9 in 2 , 3 is not visible.
  • the reinforcement 14 can be designed, for example, as a plurality of rings closed in the circumferential direction or as a spiral or as a fabric structure and can be made of various materials suitable for the stated purpose (aramid, glass fiber, carbon fiber, etc.).
  • the reinforcement 14 can also be applied to the cartridge 2 subsequently.
  • the label 15 is at its ends in the circumferential direction of the cartridge 2 apply overlapping, for example glue.
  • the adhesive effect of the label 15 in the overlapping area (not shown separately), together with the corresponding overlapping rings or fabric structures of the reinforcement 14, causes a reliable reinforcement of the cartridge outer wall 5 in its circumferential direction, thus preventing its expansion and thus unfavorable pumping with associated mixed disturbances to prevent.
  • the same applies mutatis mutandis as in relation to Figures 1 and 2 stated above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP21197871.3A 2021-09-21 2021-09-21 Cartouche coaxiale à armement intégré permettant de presser sans force de rappel une masse coulante à composants multiples Pending EP4151322A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21197871.3A EP4151322A1 (fr) 2021-09-21 2021-09-21 Cartouche coaxiale à armement intégré permettant de presser sans force de rappel une masse coulante à composants multiples
US17/933,282 US20230087866A1 (en) 2021-09-21 2022-09-19 Coaxial cartridge having an integrated reinforcement for dispensing a flowable multi-component composition without restoring force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21197871.3A EP4151322A1 (fr) 2021-09-21 2021-09-21 Cartouche coaxiale à armement intégré permettant de presser sans force de rappel une masse coulante à composants multiples

Publications (1)

Publication Number Publication Date
EP4151322A1 true EP4151322A1 (fr) 2023-03-22

Family

ID=77864450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21197871.3A Pending EP4151322A1 (fr) 2021-09-21 2021-09-21 Cartouche coaxiale à armement intégré permettant de presser sans force de rappel une masse coulante à composants multiples

Country Status (2)

Country Link
US (1) US20230087866A1 (fr)
EP (1) EP4151322A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338925A (en) * 1979-12-20 1982-07-13 Jo Miller Pressure injection of bone cement apparatus and method
DE3201630A1 (de) * 1981-01-31 1982-10-07 Toray Silicone Co., Ltd., Tokyo Mit druckluft betriebene spritzpistole zum ausbringen von elastischen dichtmassen
US20020008123A1 (en) * 2000-07-21 2002-01-24 Kazumi Nakayoshi Paste dispensing container
US20050049558A1 (en) * 2003-06-18 2005-03-03 Michael Knee Dispensing cartridge
KR20140024716A (ko) * 2012-08-21 2014-03-03 주식회사 다우기업 실런트용 카트리지

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4338925A (en) * 1979-12-20 1982-07-13 Jo Miller Pressure injection of bone cement apparatus and method
DE3201630A1 (de) * 1981-01-31 1982-10-07 Toray Silicone Co., Ltd., Tokyo Mit druckluft betriebene spritzpistole zum ausbringen von elastischen dichtmassen
US20020008123A1 (en) * 2000-07-21 2002-01-24 Kazumi Nakayoshi Paste dispensing container
US20050049558A1 (en) * 2003-06-18 2005-03-03 Michael Knee Dispensing cartridge
KR20140024716A (ko) * 2012-08-21 2014-03-03 주식회사 다우기업 실런트용 카트리지

Also Published As

Publication number Publication date
US20230087866A1 (en) 2023-03-23

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