EP4151321A1 - Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale - Google Patents

Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale Download PDF

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Publication number
EP4151321A1
EP4151321A1 EP21197870.5A EP21197870A EP4151321A1 EP 4151321 A1 EP4151321 A1 EP 4151321A1 EP 21197870 A EP21197870 A EP 21197870A EP 4151321 A1 EP4151321 A1 EP 4151321A1
Authority
EP
European Patent Office
Prior art keywords
cartridge
wall
support structure
tube
front wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21197870.5A
Other languages
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 EP21197870.5A priority Critical patent/EP4151321A1/fr
Priority to US17/933,263 priority patent/US11858716B2/en
Publication of EP4151321A1 publication Critical patent/EP4151321A1/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
    • 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
    • B05C17/00596—The liquid or other fluent material being supplied from a rigid removable cartridge having no active dispensing means, i.e. the cartridge requiring cooperation with means of the handtool to expel the material

Definitions

  • the invention relates to a system for storing and dispensing a flowable multi-component mass. It comprises a coaxial cartridge adapted to receive and store a first and a second component of the mass in separate coaxial chambers, and a suitable support structure into which this cartridge is to be placed for squeezing the mass therefrom. Even if the explanation of the invention here usually only mentions the two coaxial 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 the 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 which can prevent elastic deformation of the cartridge outer wall during the squeezing process.
  • This support structure would have to fit as closely as possible to the cartridge in order to limit the possible pumping 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 only moves inside during the squeezing process this annular gap could expand elastically. 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 system for storing and dispensing a flowable multi-component mass (hereinafter referred to as mass) is provided. It comprises a coaxial cartridge for storing the multi-component mass and a support structure into which the cartridge is to be inserted for squeezing the mass out of it.
  • 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 intended 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 cartridge inner wall and a cartridge outer wall which is arranged coaxially (i.e. with the same cylinder axis) around it and which is also cylindrical at least on the inside.
  • the cartridge thus has an inner chamber delimited radially by the cartridge inner wall for receiving the first component of the multi-component mass and an outer chamber arranged radially between the cartridge inner wall and the cartridge outer wall 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 firmly closes the inner chamber and the outer chamber in the axial direction and in doing so has a discharge opening for the first component in the area of the inner chamber and has a discharge opening for the second component in the area of the outer chamber.
  • the cartridge further 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 piston is designed for squeezing the first component out of the inner chamber and the outer piston for squeezing the second component out of the outer chamber by simultaneously moving both pistons axially towards the cartridge front wall (this is referred to herein as the squeezing process).
  • the system comprises a support structure which is designed to receive and hold the cartridge when the mass is squeezed out of it and for this purpose has an at least partially tubular section-shaped side wall which is at least partially closed on its first end face by a supporting structure front wall designed to support the cartridge front wall.
  • the inner diameter of this side wall is designed to vary or be adjustable in the axial and/or radial direction of the support structure (i.e. can be varied by applying a suitable force in the system or from the outside) such that there is both an annular gap (i.e.
  • Insertion and removal of the cartridge into/from the support structure consists or is adjustable, as well as a tight fit of the side wall against the cartridge outer wall (ie without the mentioned annular gap in between) for the duration of a squeezing process or is adjustable.
  • This support structure can thus allow both easy insertion/removal of the cartridge and close contact with it in the event of squeezing to avoid the disruptive pumping behavior (ie elastic recovery behavior) of the cartridge described at the outset.
  • the cartridge outer wall is also cylindrical on the outside (cf. 1 ).
  • the side wall of the support structure is designed as a cylindrical tube slotted in the axial direction, in particular made of elastically deformable material (e.g. steel).
  • the support structure also has an externally operable closing and opening mechanism for this slot, such that the tube when the slot is open has an inside diameter that is larger by a predetermined double annular gap width than an outside diameter of the cartridge outer wall, while the tube when the slot is closed is narrow against the outer wall of the cartridge.
  • Said predetermined annular gap width can, for example, be just large enough to enable the cartridge to be inserted into and removed from the support structure without any problems.
  • the closing and opening mechanism for the slot can be designed as a wedge system (cf. Figures 2-4 ).
  • This includes an axially slotted inner wedge made of two wedge halves, which are attached to the outside of the tube on both sides of its slot and taper in the axial direction of the tube in the shape of a wedge.
  • the wedge system comprises an outer wedge which encloses the inner wedge on the outside and can be displaced axially thereon and has two opposing wedge-shaped inner flanks facing the inner wedge.
  • the wedge-shaped inner flanks of the outer wedge are designed in such a way that when the outer wedge is axially displaced in one direction, they push the two wedge halves of the inner wedge towards one another in the circumferential direction until the slot in the pipe closes as a result. through the axial By shifting the outer wedge in the other direction, the inner wedge and with it the slot in the pipe can be opened again.
  • the support structure in this embodiment can have an integrated cover which can be adjusted between an open state for inserting and removing the cartridge and a closed state for holding the cartridge in the support structure and for performing an ejection process.
  • the closing and opening mechanism for the slot can be mechanically coupled to the cover in that the slot is also open when the cover is open and the slot is also closed when the cover is closed.
  • the cartridge outer wall is conical on the outside and tapers towards the cartridge front wall with a predetermined cone slope (cf. Figures 5a-5b ).
  • the side wall of the support structure also tapers conically on the inside towards the support structure front wall with the same cone gradient as the cartridge outer wall and has the same inner diameter on the support structure front wall as an outer diameter of the cartridge outer wall on the cartridge front wall. Due to this geometry, there is an annular gap between the cartridge outer wall and the side wall during the insertion of the cartridge into the support structure and the removal of the cartridge from it, which only closes completely when the cartridge front wall hits the support structure front wall.
  • the support structure for the squeezing process lies completely against the cartridge, so that the mass can be squeezed out without any disruptive resilience of the cartridge outer wall.
  • the support structure in this embodiment can be opened and closed again along an axial dividing line in its side wall in order to remove the cartridge inserted therein (cf. 6 ).
  • it can have two side wall segments that can be separated from one another in a reversible manner along this axial dividing line, each of which extends only over a partial angle segment extend circumferentially and are rotatably connected to one another, for example by an axial hinge or other rotary joint, along an axial connection line which lies circumferentially away from the parting line. This can also be used to insert the cartridge into the support structure to make it even easier.
  • the cartridge outer wall is conical on the outside and widens toward the cartridge front wall with a predetermined cone slope (cf. 7 ).
  • the support structure front wall is designed as a reversibly closable cover for opening the support structure for inserting the cartridge via the first end face of the support structure and for closing the support structure for the duration of a squeezing process.
  • the side wall of the support structure is composed of a cylindrical outer tube and an inner tube inserted into it and mounted in an axially displaceable manner.
  • the inner tube widens conically on the inside towards the support structure front wall with the same cone pitch as the cartridge outer wall and has the same inner diameter on the support structure front wall as an outer diameter of the cartridge outer wall on the cartridge front wall.
  • the support structure has an axial pressure device on its second end face (for example in the form of a spring that loads the inner tube with spring force in the axial direction), which is designed to press the inner tube against the closed cover.
  • the support structure for the squeezing process lies completely against the cartridge, so that the mass can be squeezed out without any disruptive resilience of the cartridge outer wall.
  • the cartridge outer wall is also designed to be cylindrical on the outside.
  • the side wall of the support structure consists of an outer tube, which tapers conically on the inside towards the front wall of the support structure with a predetermined cone slope, and an inner tube that is mounted in an axially displaceable (and in particular completely removable) manner, which is cylindrical on the inside and is axially slotted several times to change its diameter.
  • the outer tube geometry mentioned can be achieved, for example, by a suitable conical tubular inner layer which is permanently fastened in a stable cylindrical outer tube, for example as in 8 .
  • the inner tube tapers conically on the outside toward the support structure front wall with the same cone gradient as the outer tube and has completely closed slits when it rests against the support structure front wall and has the same inner diameter as an outer diameter of the cartridge outer wall.
  • the support structure has on its second end face an axial pressure device (for example in the form of a spring that loads the inner tube with spring force in the axial direction), which is designed to press the inner tube against the support structure front wall.
  • the support structure for the squeezing process lies completely against the cartridge, so that the mass can be squeezed out without any disruptive resilience of the cartridge outer wall.
  • the inner tube in this embodiment can have carrier hooks that project radially inwards on the second end face of the support structure and are arranged axially behind the outer piston of the cartridge inserted in the support structure (cf. 8 ).
  • the carrier hooks project radially behind the outer piston, so that the outer piston, when it is pulled back after the squeezing process to remove the cartridge, takes the inner tube of the support structure with it via the carrier hooks and pulls it out of the outer tube.
  • the slits of the inner tube open at the same time and an annular gap is formed between the cartridge outer wall and the side wall of the support structure, which facilitates removal.
  • the cartridge outer wall is also designed to be cylindrical on the outside.
  • the side wall of the support structure is made up of a cylindrical outer tube, several outer rings which are mounted in an axially displaceable manner and which are in axial cross-section each tapering inwards in a trapezoidal or triangular shape (i.e. towards the cylinder axis) and with their broad sides lying against an inside of the outer tube, as well as several inner rings arranged alternately with the outer rings in the axial direction, which partially protrude radially between the outer rings and thereby axial cross-section widen inwards in a trapezoidal or triangular shape (cf. 9 ).
  • Each inner ring has a number of radial incisions or indentations distributed over its circumference to change its diameter (cf. 10 ) so that it can be pressed radially inwards by axially pushing together the adjacent outer rings and its inner diameter can thereby be reduced to the same extent as the outer diameter of the cartridge outer wall, so that it is pressed against the outer wall of the cartridge inserted in the support structure.
  • the support structure has an axial pressure device on its second end face (for example in the form of a spring that loads the outer rings with spring force in the axial direction), which is designed for axially pushing the outer rings together towards the support structure front wall.
  • the inner rings on their broad inner sides facing the cartridge can be geometrically complementary to the geometry of the cartridge outer wall and geometrically designed for said interaction with the outer rings in such a way that they completely cover the cartridge outer wall when they rest against it and thus support it radially over the entire surface during the squeezing process.
  • the cartridge outer wall is also designed to be cylindrical on the outside.
  • the side wall of the support structure is composed of a cylindrical outer tube and a hydraulic cushion which rests on the outer tube over its entire radial circumference and at least partially also on the inside of the front wall of the support structure and which is filled with a flowable medium (cf. 11 ).
  • the hydraulic cushion is designed and dimensioned in such a way that, when the cartridge is inserted in the support structure, it encloses the entire outer wall and at least part of the cartridge front wall. Its inner diameter in its unloaded state, which prevails before and during the insertion of the cartridge into the support structure, is greater than an outer diameter of the cartridge outer wall by a predetermined double the annular gap width.
  • the cushion in its loaded state which occurs with the start of a squeezing process and the associated pressing of the cartridge outer wall against the support structure front wall, comes into close contact with the entire cartridge outer wall due to the immediate escape/displacement of the flowable medium from front wall sections into side wall sections of the cushion.
  • the support structure for the squeezing process lies completely against the cartridge, so that the mass can be squeezed out without any disruptive resilience of the cartridge outer wall.
  • Said predetermined annular gap width can, for example, be large enough to enable the cartridge to be inserted into and removed from the support structure without any problems.
  • the flowable medium can be largely incompressible, at least at pressures that can be achieved during a squeezing process in the system, so that when the outer wall of the cartridge is pressed against the support structure front wall, it is displaced from the front wall sections into the side wall sections of the cushion right at the beginning of the squeezing process, until the the annular gap remaining between the cushion and the outer wall of the cartridge closes.
  • a gel or a liquid, for example can be suitable as a flowable medium for this purpose.
  • certain gases can also be suitable for the described functionality, which are indeed compressible, but with increasing pressure in the front wall sections of the cushion can quickly escape into the side wall sections and thereby also cause them to swell radially.
  • the cartridge inner wall and the cartridge outer wall can each have a circular cross section.
  • this is not absolutely necessary for the functional principle presented here, so that in principle other cross-sectional shapes, such as elliptical or rectangular, can also be implemented.
  • At least the inner wall of the cartridge and/or the outer wall of the cartridge can be made of plastic.
  • the entire cartridge can be made of plastic, and its individual components can be made of the same or different types of plastic.
  • other materials, such as metal, can also be used. The same can also apply accordingly to the support structure.
  • the cartridge front wall has a connecting piece on its side facing away from the inner and outer chambers, into which the dispensing 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 .
  • FIG. 1 shows an example of a system 1 according to a first embodiment of the invention in an axial longitudinal section, in which a coaxial cartridge 2 for pressing out the multi-component mass contained therein is inserted into a support structure 3, the side wall 13 of which is slotted in one piece Tube with an axial slot 14 (which can only be seen in the views of Figures 2 to 4 can be seen) and a wedge lock (wedge system) as a closing and opening mechanism (cf. Figures 2-4 ) is designed for the slot 14.
  • a coaxial cartridge 2 for pressing out the multi-component mass contained therein is inserted into a support structure 3, the side wall 13 of which is slotted in one piece Tube with an axial slot 14 (which can only be seen in the views of Figures 2 to 4 can be seen) and a wedge lock (wedge system) as a closing and opening mechanism (cf. Figures 2-4 ) is designed for the slot 14.
  • the cartridge 2 comprises a hollow-cylindrical cartridge inner wall 4 and a hollow-cylindrical cartridge outer wall 5 arranged around it with a common cylinder axis A, whereby an inner chamber 6 delimited radially by the cartridge inner wall 4 and an outer chamber 7 arranged radially between the cartridge inner wall 4 and the cartridge 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 squeezed out of the cartridge 2 through the dispensing openings of the cartridge front wall 8 (squeezing process).
  • the support structure 3 is at its in 1
  • the first end face on the right is closed by a supporting structure front wall 15, which is formed in one piece with the side wall 13 in this example (with the exception of an opening through which the connecting piece 9 of the cartridge 2 protrudes outwards).
  • the support structure front wall 15 serves to support the cartridge front wall 8 during the squeezing process.
  • an inside diameter of the support structure 3 with the slot 14 open (in Figures 2-4 shown) by a predetermined twice the annular gap width larger than an outer diameter of the cartridge 2, so that a cylindrical annular gap 12 remains between the cartridge outer wall 5 and the side wall 13 of the support structure 3, which facilitates the insertion of the cartridge 5 into the support structure 3.
  • the side wall 13 of the support structure 3 is 1 as a slotted cylindrical tube, preferably made of an elastically deformable material (e.g. steel).
  • an elastically deformable material e.g. steel
  • Figures 2 to 4 14 show the slot 14 and its closing and opening mechanism, which is designed as a wedge system purely by way of example, in three different views. For this shows 2 the support structure 3 of 1 in a perspective view, 3 in a half radial cross-section and 4 in a side view looking at the slot 14 and the wedge system.
  • the slot 14 extends in the longitudinal direction of the tube.
  • the width of the slot 14 is, for example, approximately 5 mm, sufficient for a tube diameter of approximately 113 mm.
  • the slot width should be selected according to the pipe diameter in order to ensure a sufficient annular gap 12 for inserting/removing the cartridge 2 and a sufficient path for tensioning the support structure 3 and to allow the support structure 3 to fit snugly against the cartridge 2 for the squeezing process.
  • the closing and opening of the slit 14 by clamping the one-piece, slit tube can be done by means of a wedge system consisting of a slotted inner wedge 16 which is attached to the tube and two wedge halves 16a and 16b extending axially on both sides of the slit 14 , and an outer wedge 17 with wedge-shaped inner flanks 17a and 17b, which can be moved axially on the inner wedge 16 and encloses the two wedge halves 16a and 16b.
  • the movement of the enclosing outer wedge 17 is coupled with the closing of a cover (not shown separately) on the dispensing device (i.e. support structure 3), which is provided for reversibly opening the support structure for inserting and removing the cartridge 2 . If this cover is open, an annular gap 12 has formed between the cartridge 2 and the support structure 3 and the cartridge 2 can be pushed in. If the lid is closed, the enclosing outer wedge 17 pulls over the support structure 3 and the annular gap 12 closes as a result.
  • the support structure 3 thus lies completely against the cartridge 2, pumping of the cartridge 2 when pressure is applied is prevented and the mass can be pressed out.
  • Figure 5a-5b each show a longitudinal section of a system 1 according to a second embodiment of the invention with an annular gap 12 between cartridge 2 and support structure 3 when inserting or removing the cartridge 2 ( Figure 5a ) and without annular gap 12 with the completely inserted cartridge 2 ( Figure 5b ).
  • Handy insertion and removal of the cartridge 2 with simultaneous elimination of the annular gap 12 when the cartridge 2 is inserted can be achieved here by conical design of the cartridge 2 on the outside and conical design of the support structure 3 on the inside with as exactly the same cone gradient as possible.
  • the cartridge 2 tapers towards the front through a conical outer wall (ie toward the cartridge front wall 8).
  • the support structure 3 also has the same geometric configuration, which also tapers towards the front (ie towards the support structure front wall 15).
  • the angles of the cartridge outer wall 5 and the side wall 13 of the support structure 3 are identical.
  • the cartridge inner wall 4 can remain cylindrical and does not require any conical configuration. However, it is not possible to load the squeezing device (support structure 3) from the front. Instead, the cartridge 2 can be inserted axially from the rear or from the side in an in 6 Sketched two-part support structure 3 done. Dividing the conical side wall 13 into two offers the advantage that the cartridge 2 can be removed more easily after it has been pressurized (ie after the squeezing process).
  • FIG. 6 shows a cross section of the system 1 of FIG Fig. 5a-b in the case of a side wall 13 of the support structure 3 that is open along an axial dividing line 18.
  • the side wall 13 has two side wall segments 13a and 13b that can be separated from one another in a reversible manner along the axial dividing line 18 circumferentially off the parting line 18 are rotatably connected to each other.
  • FIG. 7 shows a longitudinal section of a system 1 according to a third embodiment of the invention.
  • the cartridge 2 tapers here in contrast to FIG Figures 5a-5b backwards and not forwards.
  • the side wall 13 of the support structure 3 has a movable conical element in the form of a conical inner tube 20 which is inserted into a cylindrical outer tube 21 .
  • the inner tube 20 is loaded in the form of springs by means of an axial pressure device 30 arranged on the second end face of the support structure 3 and is mounted in the outer tube 21 in an axially displaceable manner.
  • the entire structure is pushed further into the enclosing support structure 3 until the cartridge front wall 8 is flush with the side wall 13 of the support structure 3 and the support structure front wall 15 can be closed in the form of a lid.
  • the influence of any diameter tolerances in the cartridge 2 or the support structure 3 can be reduced or eliminated.
  • the removal of the empty cartridge 2 can be supported by the pistons 10/11 of the cartridge 2 or the squeezing device by pushing the empty cartridge 2 forward out of the enclosing cone of the inner tube 20 with the support structure front wall 15 (cover) open.
  • FIG. 8 shows a longitudinal section of a system 1 according to a fourth embodiment of the invention.
  • two conical elements are provided in the side wall 13 of the support structure 3: a conical outer tube 22 and a conical inner tube 23.
  • the conical outer tube 22 consists of a cylindrical outer tube 22a and an integrally connected forwardly tapering tubular inner layer 22b, whose movement axially or radially with respect to the cylindrical outer tube 22a is not possible.
  • the movable conical inner tube 23, which encloses the cartridge 2, has multiple axial slits (not shown) in order to allow its diameter to change so that it fits tightly against the cartridge 2 for the squeezing process. It is also mounted on the inside of the conical outer tube 22 so that it can move axially and is equipped with an axial pressure device 30 (similar to that in Figure 7 ) spring-loaded to fully support the inserted cartridge 2.
  • the pistons 10/11 of the cartridge 2 or of the dispensing device can pull back the conical inner tube 23 using its carrier hooks 24 gripping radially and axially behind the piston 11 when the pistons 10/11 return thus an annular gap 12 similar to that 1 form.
  • FIG. 9 shows a longitudinal section of a system 1 according to a fifth embodiment of the invention. It shows a further possibility of a conical design of the side wall 13 of the support structure 3 in a cylindrical cartridge 2 by using many conical inner rings 25, which can be separated in a suitable manner in the radial direction (e.g. by means of radial incisions 33 as in 10 ) are variable in diameter.
  • An axial force F which is generated, for example, by springs in an axial pressure device 30 as in 7 or 8th can be effected, presses the conical inner rings 25 with their surfaces 26 conical on both sides in the axial direction against adjacent outer rings 27, which also have conical surfaces 28 on both sides in the axial direction and thereby with their widths Pages 29 abut against a cylindrical outer tube 31 of the support structure 3, on which they are mounted axially displaceable.
  • the axial force F pushes the outer races 27 together axially, forcing the respective inner races 25 therebetween inwardly (as illustrated by radial arrows) through the interaction of the conical surfaces 26 and 28 .
  • this requires a reversible diameter reduction of the inner rings 25 through the elastic sealing of their radial incisions 33 ( 10 ).
  • the inner rings 25 rest against the cartridge 2 with their wide inner sides 32 and eliminate the annular gap 12 ( 1 ).
  • the axial force F is removed, the diameter of the inner rings 25 increases due to the spring action of the radial incisions 33, and an annular gap 12 is created again between the support structure 3 and the cartridge outer wall 5 (cf. 1 ).
  • the handy insertion or removal of the cartridge 2 is possible.
  • FIG 10 shows a radial cross section of an inner ring 25 of the support structure 3 of FIG 9 .
  • many radial incisions 33 are provided alternately on the outside and inside in the inner ring 25, which separate the inner ring 25 only up to about half its radial thickness or only partially beyond it.
  • FIG. 11 shows a longitudinal section of a system 1 according to a sixth embodiment of the invention, which illustrates a further embodiment of a support structure 3 with a variable inner diameter with a cylindrically designed cartridge outer wall 5 .
  • the inner diameter of the side wall 13 of the support structure varies by hydraulic action.
  • the side wall 13 comprises a cylindrical outer tube 31, inside which a hydraulic cushion 34 is inserted, which encloses the cartridge 2 both on the circumference and on the front contact surface (ie on the cartridge front wall 8). Will pressure from behind on the in the When the piston 10/11 located on the cartridge 2 is applied, the cartridge 2 presses on the end-side front wall section 35 of the hydraulic cushion with a pressing force F1 equal to the squeezing force provided by the squeezing device.
  • the flowable medium in the pad 34 is displaced into the rear side wall section 36 of the pad 34, i.e. the side wall section encompassing the cartridge outer wall 5, whereby its thickness increases radially inwards and the inner diameter becomes correspondingly smaller, so that the pad 34 fully rests against the Cartridge 2 comes, exerting a radial pressure indicated by arrows on it.
  • the annular gap 12 that prevails in the unloaded state of the system 1 closes (cf. 1 ), so that the cartridge 2 is prevented from expanding under pressure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP21197870.5A 2021-09-21 2021-09-21 Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale Pending EP4151321A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21197870.5A EP4151321A1 (fr) 2021-09-21 2021-09-21 Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale
US17/933,263 US11858716B2 (en) 2021-09-21 2022-09-19 Support structure having varying inner diameter for pressing a multi-component composition out of a coaxial cartridge without restoring force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21197870.5A EP4151321A1 (fr) 2021-09-21 2021-09-21 Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale

Publications (1)

Publication Number Publication Date
EP4151321A1 true EP4151321A1 (fr) 2023-03-22

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EP21197870.5A Pending EP4151321A1 (fr) 2021-09-21 2021-09-21 Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale

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US (1) US11858716B2 (fr)
EP (1) EP4151321A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4151321A1 (fr) * 2021-09-21 2023-03-22 Hilti Aktiengesellschaft Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501080A1 (fr) * 1981-03-03 1982-09-10 Guillot Claude Dispositif pour l'application d'un melange d'au moins deux composants liquides ou pateux
US20100108709A1 (en) * 2004-12-30 2010-05-06 Plas-Pak Industries Cartridge delivery system utilizing film bags
US20100206904A1 (en) * 2009-02-13 2010-08-19 Andreas Staub Multicomponent cartridge for single use

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE105181T1 (de) * 1982-09-07 1984-12-20 Liquid Control International Co., Brecksville, Ohio Vorrichtung zur abgabe von fluessigen mischungen.
ES2072222B1 (es) * 1993-11-18 1998-01-16 Canut Salvador Ribera Aparato con cartucho mejorado para aplicar productos pastosos.
DE19618693A1 (de) * 1996-05-09 1997-11-13 Upat Max Langensiepen Kg Kartusche für Zweikomponentenmassen
US7497355B2 (en) * 2005-01-08 2009-03-03 Nordson Corporation Dual fluid cartridge with reduced fluid waste
EP4151321A1 (fr) * 2021-09-21 2023-03-22 Hilti Aktiengesellschaft Structure de soutien ayant un diamètre intérieur variable permettant de presser sans force de retour d'une masse à composants multiples à partir d'une cartouche coaxiale

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501080A1 (fr) * 1981-03-03 1982-09-10 Guillot Claude Dispositif pour l'application d'un melange d'au moins deux composants liquides ou pateux
US20100108709A1 (en) * 2004-12-30 2010-05-06 Plas-Pak Industries Cartridge delivery system utilizing film bags
US20100206904A1 (en) * 2009-02-13 2010-08-19 Andreas Staub Multicomponent cartridge for single use

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US20230089731A1 (en) 2023-03-23
US11858716B2 (en) 2024-01-02

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