EP4072969B1 - Cartouche et procédé de fabrication d'une cartouche - Google Patents

Cartouche et procédé de fabrication d'une cartouche Download PDF

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Publication number
EP4072969B1
EP4072969B1 EP20815834.5A EP20815834A EP4072969B1 EP 4072969 B1 EP4072969 B1 EP 4072969B1 EP 20815834 A EP20815834 A EP 20815834A EP 4072969 B1 EP4072969 B1 EP 4072969B1
Authority
EP
European Patent Office
Prior art keywords
cover
insert
cartridge
chamber
predetermined breaking
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.)
Active
Application number
EP20815834.5A
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German (de)
English (en)
Other versions
EP4072969A1 (fr
Inventor
Ralf Willner
Tihomir Tapov
Sarah Freudling
Thomas Ayrle
Tobias Donner
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
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Filing date
Publication date
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Publication of EP4072969A1 publication Critical patent/EP4072969A1/fr
Application granted granted Critical
Publication of EP4072969B1 publication Critical patent/EP4072969B1/fr
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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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0055—Containers or packages provided with a flexible bag or a deformable membrane or diaphragm for expelling the contents
    • 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
    • B65D2205/00—Venting means

Definitions

  • the present invention relates to a cartridge for a squeezing device and a method for producing a cartridge.
  • Cartridges are mainly used for storing material such as glue, sealant, mortar, paint or lubricants.
  • the material can be easily applied to an object via the cartridges, provided the cartridge is inserted into an appropriate squeezing device.
  • the material can be applied precisely using the squeezing device. For example, a rod of the squeezing device presses against a bottom of the cartridge, as a result of which the volume of the cartridge is compressed, so that the material in the cartridge is pressed out of an opening.
  • An attachment can be attached to the cartridge in order to be able to apply the material to the object in a controlled and precise manner.
  • Cartridges are known from practice that are designed with a foil bag that is not inherently rigid and with an inherently rigid insert.
  • the film bag has a cylindrical wall and a base part, the insert being connected to the film bag at an end remote from the base part.
  • the insert is ring-shaped and has a circular opening through which the chamber can be filled with the material.
  • a flexible container according to the preamble of claim 1, comprising a cylindrical member made of flexible film. There is provided a ring member which is harder than the flexible sheet and is inserted into the inside of a second end portion of the cylindrical member and airtightly bonded by fusion.
  • a cartridge for a squeezing device is proposed with at least one elongated film bag that is not inherently rigid and has a chamber for receiving a mass, with a head part for interacting with the film bag and with an inherently rigid running insert, which is connected to a side facing the head part with the foil bag.
  • the insert has a passage closed by a cover and has at least one ventilation opening independent of the passage and/or at least one ventilation slot independent of the passage and/or that the passage of the insert is in an area facing the central axis of the film bag has at least one ventilation notch.
  • a cartridge designed according to the invention has the advantage that the chamber can be filled easily and quickly. This is achieved by the proposed shape of the insert, which allows air in the chamber to escape during a filling process. Air in the chamber can escape through the vent opening and/or the vent slot and/or through the vent notch of the passage.
  • the passage of the insert can have an essentially circular contour in an area facing a central axis of the film bag, so that in order to achieve the fastest possible filling process, a filling tube of a filling device designed with a circular cross section bears at least approximately sealingly against the insert . In this case, air can escape through the ventilation opening and/or the ventilation slot which is separate from the passage.
  • an "inherently rigid component” is understood to mean a component which retains its shape if it is removed from a device. Such a component is also referred to as inherently stable.
  • a plurality of venting openings and/or venting slots are preferably provided, which are arranged on the insert, in particular distributed uniformly around the circumference.
  • the ventilation openings have an essentially circular cross section.
  • the venting slots are preferably arranged essentially concentrically to a central axis of the insert.
  • venting indentations may have a substantially rectangular, triangular, arcuate, or similarly configured shape.
  • the cover has a predetermined breaking point.
  • This provides a cover that is easy to handle.
  • the cover securely closes the film bag and prevents unwanted leakage from the mass located in the chamber out of the chamber.
  • the cover enables a simple, safe and, in particular, defined opening in order to be able to release the mass located in the chamber.
  • the predetermined breaking area improves the opening properties, in particular when the cartridge is used in a squeezing device.
  • the cartridge Due to the predetermined breaking area in the cover, the cartridge can be opened in a press-out device with comparatively small forces, in particular in a defined manner.
  • the cover can be made so stable in a simple manner that self-opening of the cartridge is reliably prevented, for example if it accidentally falls down.
  • a leakage of the compound located in the cartridge can be prevented very little or completely in a simple manner and, in particular, is significantly reduced in comparison to known cartridges.
  • the cover is designed in particular as a film, but can alternatively also be designed in the form of a plate, for example, and represent a plastic plate, for example.
  • the predetermined breaking area can easily have any shape and, depending on the application, can be round, oval, square, rectangular, angular or linear, for example, or have a combination of these shapes.
  • the cover has a defined material discontinuity in the predetermined breaking area at least in areas, in particular in an entire flat area, than in a further area of the cover.
  • the cover has a simple design and can be produced inexpensively, with safe and defined opening of the cover in the predetermined breaking area being made possible.
  • the defined material discontinuity can be formed, for example, in that the cover has an increased or reduced material thickness in the predetermined breaking area at least in regions than in a further area of the cover. This enables a safe and defined opening of the cover in the predetermined breaking area.
  • Such a cover can also be produced easily and inexpensively.
  • the predetermined breaking area of the cover can also have a defined different material strength than a further area of the cover. This also enables a safe and defined opening of the cover in the predetermined breaking area.
  • a further area of the cover is understood here as an area of the cover that is not assigned to the predetermined breaking area and extends outside of the defined predetermined breaking area. Essentially constant material properties are preferably present in the further area of the cover.
  • the predetermined breaking area of the cover is delimited by a linear material weakening.
  • the linear material weakening encompasses the predetermined breaking area in particular completely and thus separates the predetermined breaking area from the further area of the cover.
  • the linear material weakening can be either a continuous, particularly uniform material weakening or a perforation, with the material thickness or the material strength of the linear material weakening being able to be both smaller and larger than the material thickness of the further area of the cover.
  • the predetermined breaking area of the cover has a defined different material strength than a further area of the cover. It can be provided that a different strength or a different microstructure is provided in the predetermined breaking area, either completely or in an area linearly enclosing the predetermined breaking area, than in the further area of the cover. This can be achieved, for example, by the action of temperature, in particular by means of a laser or energetic radiation.
  • the predetermined breaking area of the cover can preferably have an indentation which is star-shaped, cross-shaped, line-shaped, circular, semi-circular or the like.
  • the special geometry of the notch enables the pressure required to open the cartridge to be adjusted.
  • the opening characteristics can be influenced by the shape and spatial arrangement of the notch.
  • the insert is designed conically on a side facing the head part.
  • a cartridge can be provided in a structurally simple manner, in which a cover connected to the insert can be easily and securely fastened to the insert under all conditions and is held securely on the insert.
  • the cone-shaped design of the insert means that in the event of a pressure increase in the chamber before opening, a notch effect in the connection area of the cover to the insert is low and the cover expands when the cover or the film is expanded due to pressure being applied during a squeezing process reliably opened in the area of the predetermined breaking point.
  • a surface of the insert facing the head part encloses an angle of between 10° and 50° with a horizontal line arranged perpendicularly to a central axis of the film bag, with a region of the surface facing the central axis being at a greater distance from a base part of the film bag as a surface area facing away from the central axis.
  • the angle particularly preferably has a value between 15° and 35°, in particular approximately 25°.
  • the insert and the head part each have a cooperating and essentially opposite contour in areas facing one another, with the cover arranged in the area of the contours being designed to be weldable.
  • the cover can preferably not only be connected to the insert in a welding process, but the insert can also be connected to the head part by means of the cover, alternatively or additionally, by means of a welding process.
  • a welding tool provided for this purpose preferably has a cylindrical recess that essentially corresponds to the film bag and can be guided around the film bag in the direction of the insert from a side facing away from the head part, with the welding tool being designed to seal the cover at least in the area of the contours of the insert and of the To heat the headboard in such a way that the insert can be welded to the headboard by means of the cover.
  • the welding tool preferably encompasses the respective film bag on the outside.
  • the film bag can preferably be formed by a cylindrical film tube which is closed at the bottom by a bottom part, the bottom part being in particular glued and/or welded to the film tube.
  • the tubular film also called tubular film or blown film, can be formed from a thermoplastic material, it being possible for the tubular film to be extruded or welded or glued at its longitudinal seam. Since the base part is in particular glued and/or welded, there is a material connection, as a result of which the storage properties of the cartridge are improved, so that there is a leakage rate of the cartridge is reduced compared to a cartridge in which a foil pouch is closed by a clip closure.
  • the cartridge has, for example, a head part which includes at least one receptacle for the at least one insert.
  • the head part represents a kind of adapter, since the head part makes it possible for commercially available attachments or standardized squeezing devices to be used for applying the mass located in the cartridge.
  • the insert which partly protrudes beyond the foil bag, thus represents an interface to the head part.
  • the elevation enables the insert to be stably received in the receptacle of the head part. In addition, this improves the tightness during operation.
  • the cover can rest against at least two surfaces of the stepped elevation that are, for example, essentially perpendicular to one another.
  • the cover can thus also be stably attached to the insert on the underside and in the receptacle of the head part on the upper side. Furthermore, this also reduces the leakage.
  • the head part has an outlet nozzle which is in fluid communication with the receptacle.
  • the outlet nozzle can define the flow rate, in particular via its diameter.
  • the outlet nozzle has a thread.
  • Commercially available attachments or squeezing devices for applying the compound in the cartridge can be attached precisely to an outlet opening of the outlet nozzle through the thread, so that the compound can be precisely positioned and dosed during application.
  • the outlet port can have a partition that divides the volume into two or more outlet channels.
  • the relative position of the dividing wall in the outlet port defines the cross sections of the outlet channels and thus the flow rates through these outlet channels.
  • the outlet channels can have different diameters.
  • the outlet channels can be oriented coaxially with one another.
  • the head part can thus be suitable for accommodating several foil bags which can have different masses.
  • the head part separates the different masses up to the
  • Outlet opening so that the different masses can only come into contact after the outlet opening. This is important, for example, with two-component adhesives.
  • the cartridge can thus accommodate different masses and serve as multi-component packaging.
  • the different diameters of the outlet openings allow a special mixing ratio of the different masses to be set.
  • the masses in the cartridge can be a chemical mass or a liquid, for example components of a two-component mixture.
  • sealants multi-component mortars, multi-component coating compounds, multi-component paints, multi-component foam precursors, multi-component adhesives, multi-component sealants and multi-component lubricants can be stored in the appropriate cartridges.
  • An expansion space into which the cover can expand can be assigned to the receptacle of the head part.
  • the expansion space enables the cover to be opened in a controlled manner so that it does not impede the flow of the outflowing mass. On the one hand, this results in a laminar flow, since there are no obstacles in the flow path that could result in a turbulent flow. On the other hand, this ensures that the flow rate is maintained exactly, which is important for the mixing ratio of two or more components.
  • the passageway is tapered.
  • the passage acts like a confuser or nozzle when the mass flows out.
  • the tapered passage can act as a diffuser when filling the foil bag.
  • the passage can in particular be adapted to a filling cone of the mass located in the chamber. This enables the chamber to be optimally filled with a mass so that there is little or no air left in the chamber.
  • the cartridge has at least one second elongated film bag that is not inherently rigid and has a chamber for receiving a compound.
  • the cartridge can thus be used as a multi-component packaging. This allows a resin, such as an epoxy resin, and a hardener for a two-component adhesive to be stored in the same package.
  • the second film bag can have the same length as the first film bag, in which case a ratio of the base areas of the film bag is a mixing ratio to be achieved certainly.
  • a ratio of the base areas of the film bag is a mixing ratio to be achieved certainly.
  • two foil bags are used, which have a different length from one another.
  • the bottom part can be made of a plastic such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and/or acrylonitrile butadiene styrene copolymer (ABS).
  • a plastic such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and/or acrylonitrile butadiene styrene copolymer (ABS).
  • Provision can be made for the base part to be manufactured by injection molding, 3D printing or by machining. It can also consist of a preformed mono- or multi-layer film. It may be that the base part is made of the same or a comparable material as the cover. This enables the bottom part to be manufactured at low cost.
  • the foil pouch can comprise a mono- or multi-layer foil.
  • the total layer thickness is 50 to 350 ⁇ m, in particular 80 to 150 ⁇ m.
  • the materials used can be PE, PP, PET, aluminium, ethylene vinyl alcohol copolymer (EVOH), polyamide (PA) and/or polylactic acid (PLA).
  • a coating with silicon oxide or aluminum oxide can also be provided for each layer.
  • the multilayer film can be produced by adhesive or extrusion lamination.
  • the film bag can preferably be folded up evenly during a squeezing process, similar to an accordion, so that as much as possible the entire mass in the chamber can be used.
  • the foil pouch is exposed to chemical masses or liquids, which can sometimes attack the foil pouch.
  • An exact composition of the film bag must therefore sometimes be adapted to the mass or liquid in the chamber, in particular to the corresponding material properties.
  • the cover can preferably be designed as a multi-layer film.
  • the cover has a PE and/or a PP layer on the top and bottom so that it can be welded, for example thermally welded, to other plastic parts of the cartridge.
  • the foil can also have layers of PVC, especially if other plastic parts of the cartridge are made of PVC.
  • a barrier layer can be provided between a top and a bottom of the cover, which, for example, prevents the ingress of oxygen or water vapor into the chamber after it has been closed off by the cover. This also reliably prevents outgassing of the mass located in the chamber.
  • the total thickness of the cover can be between 50 ⁇ m and 350 ⁇ m. In particular, it is provided that the total thickness is between 130 ⁇ m and 250 ⁇ m.
  • the barrier layer may, for example, comprise aluminum or coatings of silicon oxide and/or aluminum oxide on PET, bi-axially arranged PP (BOPP), PA, PLA, or ethylene vinyl alcohol copolymer (EVOH).
  • BOPP bi-axially arranged PP
  • PA PA
  • PLA PLA
  • EVOH ethylene vinyl alcohol copolymer
  • multi-layer films are preferred.
  • the technical advantages described for the cartridge apply analogously to the proposed method for producing the cartridge, so that a filling process of a cartridge produced using the proposed method can be carried out particularly easily and quickly.
  • the provision of the at least one venting notch, the at least one venting opening and/or the at least one venting slot reliably prevents the pressure in the film bag or in the chamber from becoming undesirably high during a filling process of the chamber, since air during the filling process via the Vent notch, vent opening and/or vent slot to escape.
  • the production of the filled cartridge can be separated into different production steps.
  • the production of the film bag is separated from the filling of the film bag and the attachment of the film bag in the head part.
  • the modular design of the cartridge enables the individual elements to be adapted to the different requirements placed on the cartridge by the mass in the chamber.
  • the decoupling of the production of the foil bag from the filling reduces the complexity of the production of the cartridge. In this way, better quality can be guaranteed because different machines and materials can be used for production and filling.
  • a defined predetermined breaking area is produced in the area of the cover.
  • the predetermined breaking area of the cover can be produced, for example, before the production of the film bag, after the production of the film bag or during the production of the film bag.
  • the predetermined breaking area is preferably introduced into the cover only after the composition has been filled into the chamber and the chamber has been closed by the cover. In this respect, for example, material of the cover is removed from an outside facing away from the chamber in order to form the predetermined breaking area.
  • the predetermined breaking area can also be produced before the cover is attached to the chamber. This also results in the possibility of forming the predetermined breaking area on an underside of the cover facing the chamber, or forming two opposing predetermined breaking areas on the underside and upper side.
  • the film bag has a film tube and a base part, with the film tube preferably being formed by welding or gluing.
  • the predetermined breaking area of the cover by means of a laser, a material weakening by hot embossing or by thermal embossing with a heated stamp, by scoring with a suitable cutting tool or knife or during a Welding of the cover is made to the insert.
  • the predetermined breaking area in particular, has a different material thickness and/or strength than other areas of the cover, and a defined predetermined breaking area is thereby formed.
  • At least one welding parameter is varied in other areas compared to the connection of the cover to the insert and, for example, a higher pressure, an increased temperature or a longer welding time or a combination this parameter used.
  • the predetermined breaking point occurs in the immediate vicinity of the weld seam or in the weld seam itself.
  • the insert has at least one material extension, in particular a material extension surrounding the passage, which melts during the closing of the passage.
  • the tightness is improved as a result of the material connection between the insert and the cover can be secured due to the melt.
  • the extension of material can surround the passage of the insert. It acts as the liner's fusing point, providing quality coverage and preventing mass from escaping the chamber through the opening.
  • a head part which has at least one receptacle and the insert is inserted into the receptacle.
  • the head part enables the cartridge to be inserted into commercially available squeezing devices, which means that the cartridge can be squeezed out in a controlled manner when the mass in the chamber is applied to a corresponding object.
  • a second film bag with a chamber is provided.
  • the second film bag can be designed in a manner analogous to the first film bag and can be connected to the head part.
  • the connection is preferably carried out by means of gluing or welding. Accordingly, a multi-component packaging or cartridge can be produced in a simple manner.
  • the covers of the various chambers can be designed with differently designed predetermined breaking areas, for example different indentations.
  • figure 1 shows a cartridge 10 in an exploded view in a longitudinal section.
  • the cartridge 10 comprises a head part 12, two covers 14, two inserts 16 and two foil pouches 18.
  • the film bags 18 are not designed to be inherently rigid and each have a cylindrical and essentially elongated shape.
  • the film bags 18 each delimit a chamber 20 and have an opening 22, the chamber 20 being able to be closed by the film bag 18 in particular in a sealing manner.
  • the film bag 18 is formed by a base part 24 and a film tube 26 .
  • the bottom part 24 has a base 28 and a collar 30 running around the base 28 .
  • the film tube 26 is attached to the outside of the collar 30 by welding or gluing.
  • the tubular film 26 can also be attached to the inside of the collar 30 by welding or gluing.
  • the tubular film 26 can be made, for example, from a film by gluing or welding edge areas. Provision can also be made for using a prefabricated film tube or a prefabricated film bag.
  • the base 28 is circular, for example, so that the chamber 20 is configured in a cylindrical shape. In principle, however, any shape of the base area 28 is conceivable, for example rectangular or polygonal.
  • the insert 16 is designed to be inherently rigid and is inserted at least partially on the inside through the opening 22 into the corresponding chamber 20 of an associated film bag 18 .
  • Figure 2a , Figures 2b and 2c show different embodiment variants of an insert 16 or a cover 14, wherein the inserts 16 are each provided for connection to a film bag 18.
  • the insert 16 according to Figure 2a has three sections 32, 34 and 36 in one piece, which are arranged one on top of the other with respect to a longitudinal direction L of the film bag 18 or the cartridge 10, that is to say they each adjoin one another.
  • the first section 32 is arranged on a side facing away from the head part 12 and the third section 36 is arranged on a side facing the head part 12 .
  • the first section 32 has, for example, a thickness D1 in the longitudinal direction L of in particular less than 4 mm
  • the second section 34 has a thickness D2 in the longitudinal direction L of in particular less than 5 mm
  • the third section 36 has a thickness D3 in the longitudinal direction L of in particular less than 5 mm.
  • An inner side 38 facing the chamber 20 of the first two sections 32 and 34 and a first area of the third section 36, which extends from the transition of the second section 34 to the third section 36 to a kink 40, has an angle ⁇ with respect to a vertical V , which can assume values from 0 to 45°.
  • the chamber tapers in the direction of the head part 12.
  • the inner side 38 of the third section 36 has, on a side facing the head part 12 , above the bend 40 a second region which has an angle ⁇ with respect to a horizontal line H arranged perpendicular to the longitudinal axis L.
  • the angle ⁇ can have a value between 0° and 60°.
  • the insert 16 has an outer side 42 facing away from the chamber 20.
  • the outer side 42 in the region of the third section 36 comprises two surfaces 44 and 46.
  • the surface 46 is arranged parallel to the horizontal H and thus to the base surface 28 in longitudinal section, whereas the surface 44 has an angle ⁇ relative to the vertical or the longitudinal direction in the longitudinal section, but can also be arranged essentially parallel to the vertical V in an alternative embodiment.
  • surfaces 44 and 46 may be substantially perpendicular to one another in longitudinal section.
  • Figure 2b shows another embodiment of the insert 16, which differs from the insert 16 according to Figure 2a differs essentially in that the third section 36 has a conical area encompassing the surface 46 and facing the head part 12 .
  • the surface 46 facing the head part 12 encloses an angle ⁇ of 10-50°, particularly preferably of about 15°-35°, with the horizontal H.
  • the surfaces 44 and 46 are not arranged perpendicularly to one another in the longitudinal section and enclose an obtuse angle here.
  • the radially outer surface 42 is arranged essentially in the longitudinal direction L in the region of the third section 36 .
  • Insert 16 shown corresponds essentially to the insert 16 according to Figure 2b ,
  • the cover 14 is designed as a plastic plate in the embodiment shown.
  • the third section 36 of the inserts 16 according to Figure 2a and 2 B is set back with respect to the outer side 42 from the second section 34, with the third section 36 having a lesser Having outer diameter than the second portion 34. As a result, a stepped elevation 48 of the insert 16 is formed.
  • the third section 36 has a width 50 of 3 to 8 mm in the direction of the horizontal H and is offset inwards by a radial offset 52 of 2 to 4 mm compared to the second section 34 .
  • Material extension 54 On the surface 46 facing the head part 12 and thus facing upwards, which is essentially parallel to the horizontal H, a material extension 54 is provided which protrudes essentially perpendicularly from the surface 46 parallel to the horizontal H, i.e. in the longitudinal direction L Material extension 54 has a predefined height 56, as will be explained below, and a width 58 of, in particular, less than 2 mm.
  • the outside 42 in the area of the first section 32 has an angle ⁇ of between 0 and 10° relative to the vertical V and the outside 42 in the area of the third section 36 encloses an angle ⁇ of 0 to 60° with the longitudinal direction L.
  • the inner side 38 of the sections 32, 34, 36 facing the chamber 20 encloses a passage 60 which, starting from the first section 32 towards the third section 36, tapers conically.
  • the passage 60 in the area of the first section 32 has a larger opening 61 compared to the opening 63 in the area of the third section 36.
  • the insert 16 has a plurality of holes 62 in the third section 36, which are arranged between the material extension 54 and a radially inward-pointing tip 64 of the third section 36 and run essentially in the longitudinal direction L here.
  • the insert 16 is ring-shaped so that it can be coupled to the cylindrical film tube 26 .
  • the inside of the film tube 26 is connected to the insert 16 , the film tube 26 being connected to the outside 42 in the region of the first section 32 .
  • the film tube 26 is preferably welded or glued to the insert 16 .
  • the cover 14 is provided between the head part 12 and the insert 16, as shown in FIG 1 emerges.
  • the cover 14 bears against the stepped elevation 48 in radially outer regions, essentially against the two surfaces 44 and 46 .
  • the cover 14 is connected to the insert 16, for example by welding or gluing, and closes the passage 60 and the holes 62. Accordingly, the Cover 14, the chamber 20, so that the chamber 20 is preferably completely sealed in the assembled state of the cover 14.
  • the head part 12 has two receptacles 66 which, in the assembled state, interact with the inserts 16 and the cover 14 .
  • the recording 66 is divided into two areas, as well as from Figure 3a can be seen.
  • the receptacle 66 is adapted to the insert 16 and the stepped elevation 48, so that the insert 16, as in 1 as can be seen, the cover 14 rests against a side surface 70 of the receptacle 66, i.e. via its radially outward-facing outer side 42, in particular in the region of the third section 36, and, as in FIG Figure 3a as can be seen, rests on the support portion 68 with the cover 14 therebetween.
  • the receptacle 66 comprises an expansion area 72, which is designed as a depression in the receptacle 66 and, as shown in FIG 1 as can be seen, forms a propagation space 74, the function of which will be explained later.
  • the head part 12 also has an outlet nozzle 76 with an outlet opening 78 and an outlet channel 80 .
  • the exit port 78 is in fluid communication with the expansion space 74 and the receptacle 66 through the exit channel 80 .
  • the outlet connector 76 shown has two outlet channels 80 which are in fluid communication with the respective receptacle 66 and are separated from one another by a partition wall 82 which extends from a connecting web 84 separating the receptacles 66 to the outlet opening 78 .
  • the two outlet channels 80 as in 1 and Figure 3a shown, have a different cross section, in particular a different diameter, in order to set a mixing ratio of the masses, as will be explained below.
  • the outlet nozzle 76 also has a thread 86 through which an attachment (not shown) can be attached to the outlet opening 78 of the head part 12 .
  • This attachment can be part of a squeezing device into which the cartridge 10 can be inserted or inserted.
  • the cover 14 comprises a predetermined breaking area 88 which is arranged in the area of the expansion area 72 of the receptacle 66 when the cartridge 10 is connected to the head part 12 .
  • the cover 14 has a lower material thickness or material strength in the predetermined breaking area 88 than in other areas of the cover. About the lesser Material thickness, the cover 14 is correspondingly weakened in certain areas in the predetermined breaking area 88 .
  • the predetermined breaking area 88 can be produced in the cover 14 by a laser or by a heated die, for example.
  • the predetermined breaking area 88 can be produced, for example, after the cover 14 has been arranged on the insert 16 , preferably from a side facing away from the chamber 20 .
  • the predetermined breaking area 88 can also be produced from a side of the cover 14 facing the chamber 20 .
  • areas opposite one another can be machined from both sides of the cover 14 so that the predetermined breaking area 88 extends on both sides of the cover 14 .
  • the predetermined breaking area 88 can also be produced by deforming material using a stamp or by melting material using a stamp.
  • predetermined breaking area 88 in particular on a side facing away from chamber 20, so that predetermined breaking area 88 represents, for example, a notch in cover 14 that is visible from the outside. If the predetermined breaking area 88 is produced by hot stamping, the predetermined breaking area 88 is also visible from an outside. The predetermined breaking area 88 can also be produced by scoring. The frangible area 88 can also be created prior to the attachment of the cover 14 to the insert 16 by the methods mentioned.
  • Figure 3b shows a similar view as Figure 3a , with only the differences being discussed below.
  • the predetermined breaking area 88 is arranged in an area of the expansion area 72 which faces the respective other film bag 18 .
  • Figure 3b A circumferential weld seam 89 is shown, by means of which the cover 14 is fixed to the surface 46 of the insert 16.
  • the weld seam 89 is delimited in a simplified manner by two circles 91 , 93 , shown here in dashed lines, running essentially concentrically to a longitudinal axis of the film bag 18 , with the weld seam 89 representing a partial area of the surface 46 here.
  • the predetermined breaking area 88 represents, for example, a section of the weld seam 89 , the predetermined breaking area 88 being at least partially, in particular completely congruent with the weld seam 89 .
  • the predetermined breaking area 88 can also be located in the immediate vicinity of the weld seam 89 .
  • the predetermined breaking area 88 is produced during the production of the weld seam 89 by varying the welding parameters.
  • the predetermined breaking area 88 is a targeted weakening of the cover 14, so that when the film bag 18 or the chamber 20 is squeezed out by a squeezing device, the cover 14 tears open in the predetermined breaking area 88 or opens there in a defined manner.
  • the bottom part 24 of the chamber 20 is pressed in the direction of the head part 12, for example by means of a stamp of a squeezing device.
  • the cover 14 then expands into the expansion area 72 .
  • the predetermined breaking area 88 of the cover 14 is assigned to the expansion area 72, wherein the predetermined breaking area 88 ruptures above a certain force or a corresponding pressure, so that the mass passes through the passage 60 of the insert 16 and the ruptured predetermined breaking area 88 from the chamber 20 into the outlet channel 80 can flow.
  • the mass can thus flow out of the head part 12 through the outlet opening 78 and, for example, be applied to an object.
  • the outlet channel 80 and the expansion space 74 should be kept as small as possible.
  • the expansion area 72 which is associated with the chamber 20, has an area of 1-40% based on the total area of the respective receptacle 66 or 68, better 2-35% and preferably 3-30% .
  • the expansion height 90 of the expansion space 74 should be between 2.0 and 15.0 mm, in particular 3.0 and 12.0 mm and preferably 5.0 and 10.0 mm.
  • the opening force required to break open the predetermined breaking area 88 can be adjusted by changing the expansion area 72 . Furthermore, it is also possible to adapt the opening force by a corresponding arrangement of the predetermined breaking area 88 on the cover 14 or the shape and the size of the predetermined breaking area 88 .
  • the required opening force is increased when the predetermined breaking area 88 is shifted from a central area to an edge area of the expansion area 72 .
  • the expansion area 72 and the frangible area 88 are chosen such that the two chambers 20 rupture at substantially an identical opening force, so that the masses can flow out of the chambers 20 synchronously. Accordingly, a predetermined Mixing ratio of the masses from the two chambers 20 can be realized, which is predetermined by an area ratio of the base areas 28 or the division of the outlet channel 80 by the partition 82.
  • FIG 4 shows a schematic comparison between the chamber 20 of the cartridge 10 shown in the upper half of FIG 4 and a chamber 92 of a prior art cartridge 94 located in the lower half of the figure, in a longitudinal section.
  • the left side of the 4 represents the cartridges 10, 94 in a filled state and the right side of the 4 the cartridges 10, 94 in a pressed or emptied state.
  • the cartridges 10, 94 in the present example are surrounded by a cuboid 96 with the same volume, which is shown with dashed lines.
  • a width B, a length L and a height (not shown) of the two cuboids 96 are essentially the same here.
  • the chamber 92 of the prior art cartridge 94 is closed by clips 98 on both sides.
  • the clips 98 result in the chamber 92 being closed spherically at each end, so that the chamber 92 has a smaller volume than the cuboid 96 according to the cartridge 10 according to the invention. Accordingly, more mass can be filled into the chamber 20 than into the chamber 92.
  • the chamber 20 of the pressed-out cartridge 10 is enclosed by a cuboid 100 .
  • the cuboid 100 is smaller than the cuboid enclosing the prior art extruded chamber 92 such that the extruded chamber 20 has a smaller volume than the prior art extruded chamber 92 . Accordingly, the cartridge 10 can absorb more mass than the cartridge 94 known from the prior art with the same available starting volume according to cuboid 96 and less mass remains in the cartridge 10 after squeezing compared to the cartridge 94 from the prior art.
  • the cartridge 10 in figure 5 only one chamber 20, so that only one insert 16, one cover 14, one receptacle 66 and one outlet channel 80 are present. Accordingly, there is also no partition wall 82 which divides the outlet channel 80 into sub-channels.
  • a first method step the steps are represented by arrows, the base part 24 and the insert 16 are provided.
  • a film tube 26 is then attached to the outside of the collar 30 on the circumference or around the circumference of the base part 24 , for example by gluing or welding, so that a film bag 18 is formed which has an opening 22 .
  • the film tube 26 can also be attached to the collar 30 on the inside.
  • the inside of the opening 22 is then fixed to the outside 42 of the insert 16 in the area of the first section by welding and/or gluing.
  • the chamber 20 is filled with a mass 102 by a filling device 104 which has a filling head 106 and a filling tube 108 .
  • the fill head 106 and fill tube 108 are in fluid communication with each other.
  • the filling head 106 is connected, for example, to a reservoir of the compound 102 and pumps the compound 102 from the reservoir into the filling head 106.
  • the filling tube 108 protrudes through the opening 63 and the passage 60 of the insert 16 into the chamber 20, so that the compound 102 can be introduced into the chamber 20 from the filling head 106 through the filling tube 108 .
  • the air in the chamber 20 can escape through the holes 62 so that the filling tube 108 can have the same cross section as the opening 63 of the third section 36 of the insert 16 .
  • the mass 102 can thus be introduced into the chamber 20 through a large opening, so that little pressure is required for the filling process.
  • the geometry of the insert 16 is adapted to a filling cone 110 of the chemical mass 102 .
  • the geometry is particularly adapted to the filling cone 110 of viscous chemical mortar. It is thus achieved that relatively little and in particular no air is present between the insert 16 and the chemical mass 102 after the filling process. This is advantageous since the presence of air can reduce the shelf life of the mass 102 and, in the case of larger air bubbles, can have an undesirable effect on the mixing ratio achieved when using two foil bags 18 .
  • the cover 14 is mounted on the insert 16.
  • a material extension 54 can be provided which runs circumferentially here and is connected to the third section 36 of the insert 16 and which can be annular.
  • Several separate material extensions 54 can also be provided, which are designed, for example, in the shape of a partial ring and each only extend over a partial area of the circumference of the insert 16 .
  • the at least one material extension 54 serves as a melting point, so that the cover 14 and the insert 16 can be connected to one another in one piece, in particular with a material connection, by the material extension 54 being melted on.
  • cover 14 is also secured to surfaces 44 and 46 of insert 16 .
  • the molten material of the material extension 54 flows along the surfaces 44, 46 to form a kind of adhesive layer for the cover 14.
  • the cover 14 can be designed as a monofoil. After the insert 16 has been closed, part of the cover 14 is removed on the upper side of the cover 14, so that a predetermined breaking point 88 is created. This occurs, for example, when the chamber 20 is in the closed state, in that material from the cover 14 is removed from the outside.
  • the predetermined breaking area 88 can be formed in a predefined area by a defined setting of the welding parameters. For example, a higher pressure, an increased temperature or an extended welding time or a combination of these parameters can be provided in order to produce the predetermined breaking area 88 during the process of welding the cover 14 to the insert 16 . In this case, the predetermined breaking area 88 can be produced in a simple manner in the immediate vicinity of or in the area 46 .
  • the head part 12 is provided and the insert 16 is fastened with the cover 14 in the receptacle 66 .
  • the surface 44 of the stepped elevation 48 rests against the side surface 70 of the receptacle 66 .
  • This method step can be carried out, for example, by gluing or welding or a similar fastening method.
  • FIG. 7 shows the insert 16 in a longitudinal section in the upper area and a corresponding top view of the insert 16 in a lower area.
  • the holes 62 are arranged as ventilation openings 112 circumferentially around the opening 63 and have a diameter 114 of, in particular, less than 3 mm.
  • the insert 16 has eight ventilation openings 112. In principle, any number of ventilation openings 112 can be provided.
  • the ventilation openings 112 can be designed as ventilation bores.
  • the plan view of the insert 16 according to figure 8 shows that the holes 62 are designed as ventilation slots 116, which are arranged circumferentially around the opening 63, in particular at regular intervals from one another and/or coaxially with the central axis of the opening 63.
  • FIG. 12 shows a detailed view of one of the ventilation slots 116.
  • a width 118 of the ventilation slot 116 in the radial direction is in particular less than 3 mm and a length 120 in the circumferential direction is for example 1 to 20 mm.
  • the holes 62 can also be implemented as a vent notch 122 .
  • the ventilation indentations 122 function as an enlargement of the opening 63, whose original shape in the area of the ventilation indentations 122 is drawn in as a broken line.
  • FIG 11 A detail view of a vent notch 122 is shown in FIG 11 shown, from which it can be seen that a width 124 of the ventilation notch 122 in the circumferential direction has a value of less than 4 mm in particular.
  • Figures 7a, 7b and 7c show further possible implementations of inserts 16 for venting the film bag 18 during a filling process.
  • a contour 123 of the insert 16 lying on the inside in the radial direction is here in contrast to the embodiment of the insert 16 according to FIG 1 not circular.
  • the inner contour 123 represents a particularly uniform polygon, here a dodecagon
  • in Figure 7b a sine wave ring
  • in Figure 7c represents a gear wheel geometry.
  • air can escape through the opening 63 during a filling process with a cylindrical filling tube 108 without holes 62 having to be provided in the insert 16 .
  • These can also be provided in alternative versions of inserts 16 .
  • the inside of the collar 30 can also be attached to the outside of the film tube 26, as already explained.
  • the cover 14 can be designed as a monofoil. Based on 13a, 13b and 14 Embodiments of the cover 14 are shown in which the cover 14 is formed by multiple layers or by a plastic sheet.
  • the cover 14 comprises five layers.
  • a middle layer is designed as a barrier layer 126, for example in the form of an aluminum layer.
  • the layers are numbered from top to bottom in the figures, so that the top layer represents a first layer and a bottom layer represents a fifth layer.
  • a second layer and a fourth layer are each designed as a polyethylene layer (PE layer) 128 .
  • the uppermost and the lowermost layer, ie the first layer and the fifth layer of the cover 14 are each designed as a polypropylene layer (PP layer) 130 .
  • the barrier layer 126 prevents water vapor and/or oxygen from entering the chamber 20 . Particularly in the case of chemically active masses, water vapor and/or oxygen can cause the mass arranged in the chamber 20 to react and thereby reduce its durability or change its composition. In addition, the material located in the chamber 20 advantageously cannot outgas due to the barrier layer 126 .
  • FIG 13b an alternative construction of the cover 14 is shown, again with five layers.
  • the middle layer is in turn designed as a barrier layer 126 .
  • the first layer and the fifth layer 130 are also formed from polyethylene.
  • the design of the cover 14 in 14 again has five layers, with the barrier layer 126 forming the fourth layer.
  • the first layer, the third layer and the fifth layer are each implemented as a PE layer 130 in this embodiment.
  • the second layer 132 is a layer 132 of bi-axially arranged polypropylene.
  • the cover 14 can be designed with a plastic plate which is in particular inherently rigid and which preferably has PE, PP, PET, PVC, ABS, PA, PLA or comparable materials.
  • the cover 14 is here again by gluing or welding with the insert 16 of the embodiment 2 or Figure 2b associated with insert 16.
  • the configurations of the cover 14 according to 13a, 13b and 14 are only to be understood as examples. In principle, any material mentioned at the beginning is possible for a layer of the cover 14 and any number of layers is also conceivable.
  • predetermined breaking areas 88 are shown below, which differ from one another in terms of their shape. All of these figures show a detailed view of a top view of the cover 14, with the predetermined breaking area 88 being shown in more detail in each case.
  • the predetermined breaking area 88 is designed in several parts and has eight sub-areas, each of which extends radially from a center 134 to the center 134 in a substantially straight line outwards, so that the predetermined breaking area 88 forms a star-shaped pattern.
  • the predetermined breaking area 88 thus represents a symmetrical pattern overall, here a point-symmetrical pattern.
  • the predetermined breaking area 88 has four sub-areas, which in turn extend outwards from the center 134 essentially in a straight line in the radial direction, so that the predetermined breaking area represents a cross-shaped pattern which is point-symmetrical to the center 134 here.
  • the predetermined breaking area 88 shown is formed by a line running here in a straight line.
  • the predetermined breaking area 88 is formed by a circular boundary, which can be designed as a continuous line or as a perforation.
  • the line or the perforation delimits the predetermined breaking area 88 from the other area of the cover 14 lying outside of the line or the perforation.
  • the predetermined breaking area 88 is defined by an essentially semicircular line, which in turn can be embodied as a perforation or a continuous line.
  • FIG. 20 shows a side view and a top view of a further embodiment of a cartridge 10 with two foil bags 18, the foil bags 18 being connected to the head part 12 in a joint welding process.
  • the insert 16 which is designed to be inherently rigid, is first connected to the film bag 18 and then filled with a mass 102 through the passage 60 . Then again, the passage 60 is closed with the cover 14, the cover 14 being connected to the insert 16 in the manner described in more detail above and in particular being welded on.
  • the cover 14 is designed to be weldable on both sides here, so that in a further step the foil bags 18 are connected to the head part 12 in a welding process.
  • This is in accordance with the design 20 for both foil bags 18 with a common welding tool 136 and in the execution according to 21 for each film bag 18 with two separate welding tools 138, 140 and can therefore be carried out independently of one another, one welding tool 138 being assigned to one film bag 18 and the other welding tool 140 being assigned to the other film bag 18.
  • the inserts 16 have a corresponding counter-contour to the head part 12 , so that the inserts 16 rest essentially flat on the head part 12 via the cover 14 when they are connected to the head part 12 .
  • the respective, in 20 and 21 The welding tool 136, 138, 140 shown only schematically is guided from a side facing away from the head part 12 over the foil bag 18 to a contact area of the head part 12 with the insert 16, with the welding tools 138, 140 sealing the respective foil bag 18 and the corresponding contours of the insert 16 and the head part 12 in the embodiment according to FIG 21 completely surround the circumference, in each case so that a connection between the head part 12 and the film bag 18 that runs all the way around the circumference is created via the cover 14 .
  • the two film bags 18 can be attached to the head part 12 at the same time, partially overlapping or one after the other.
  • the common welding tool 140 When executing according to 20 the common welding tool 140, with which the connection of both film bags 18 to the head part 12 is possible in a single work step, includes the film bags 18 on the circumference, for example except for an area of the film bags 18 facing one another, so that a connection completely runs around the outside of the two film bags 18 is created between the head part 12 and the two foil bags 18 via the respective covers. It can be provided that there is no connection of the inserts 16 on the head part 12 via the covers 14 in a region of the two film bags 18 facing one another.
  • An inductive and non-contact welding method for example a high-frequency welding method, is preferably provided for connecting the head part 12 to the insert 16 or the inserts 16 .
  • the cover 14 preferably comprises a sheet of aluminum which is heated during the welding process, the heat being conducted through the other layers of the cover 14 to the inserts, particularly made of plastic, and the head portion 12, thereby achieving the weld.
  • a very targeted energy input is achieved at the point where the welded joint is to be created.
  • the cartridge 10 comprises one or two chambers 20 and a corresponding number of covers 14, inserts 16, foil pouches 18, receptacles 66 and exit channels 80. In general, any number of the named components is possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Tubes (AREA)

Claims (13)

  1. Cartouche (10) pour un dispositif de distribution par pression, comportant au moins un sachet en film (18) allongé qui n'est pas intrinsèquement rigide, lequel présente une chambre (20) destinée à recevoir une substance (102), comportant une partie de tête (12) permettant d'interagir avec le sachet en film (18) et comportant un insert (16) intrinsèquement rigide, lequel est relié au sachet en film (18) sur un côté orienté vers la partie de tête (12),
    caractérisée en ce
    que l'insert (16) présente un passage (60) fermé par un élément de recouvrement (14) et présente au moins une ouverture d'aération (112) indépendante du passage (60) et/ou au moins une fente d'aération (116) indépendante du passage (60) et/ou en ce que le passage (60) de l'insert (16) présente au moins une encoche d'aération (122) dans une zone orientée vers l'axe central du sachet en film (18).
  2. Cartouche (10) selon la revendication 1, caractérisée en ce que plusieurs ouvertures d'aération (112) et/ou fentes d'aération (116) sont prévues, lesquelles sont en particulier réparties de manière uniforme sur le côté circonférentiel.
  3. Cartouche (10) selon l'une des revendications 1 ou 2, caractérisée en ce que l'au moins une ouverture d'aération (112) est conçue sous forme sensiblement circulaire.
  4. Cartouche (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'au moins une fente d'aération (116) est disposée de manière sensiblement concentrique par rapport à un axe central de l'insert (16).
  5. Cartouche (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'au moins une encoche d'aération (122) présente une forme sensiblement rectangulaire, triangulaire ou incurvée.
  6. Cartouche (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de recouvrement (14) présente une zone de rupture de consigne (88).
  7. Cartouche (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'insert (16) est conçu sous forme conique sur un côté orienté vers la partie de tête (12).
  8. Cartouche (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'insert (16) et la partie de tête (12) présentent, dans des zones orientées l'une vers l'autre, un contour respectivement interagissant et conçu sensiblement de manière opposée, l'élément de recouvrement (14) disposé dans la zone des contours étant conçu de manière soudable.
  9. Cartouche (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que le sachet en film (18) est formé par un film tubulaire (26) cylindrique qui est fermé côté fond par une partie de fond (24) qui est en particulier collée et/ou soudée au film tubulaire (26).
  10. Procédé de fabrication d'une cartouche (10) pour un dispositif de distribution par pression selon l'une des revendications 1 à 9, au moyen des étapes suivantes :
    - préparation d'un sachet en film présentant une chambre (20) qui est relié à un insert (16) indéformable et à une partie de fond (24), l'insert (16) présentant une ouverture (22),
    - remplissage de la chambre (20) d'une substance (102) à travers l'ouverture (22) et
    - fermeture de l'ouverture (22) par un élément de recouvrement (14).
  11. Procédé selon la revendication 10, caractérisé en ce qu'une zone de rupture de consigne définie est fabriquée dans la zone de l'élément de recouvrement.
  12. Procédé selon la revendication 11, caractérisé en ce que la zone de rupture de consigne (88) de l'élément de recouvrement (14) est fabriquée au moyen d'un laser, d'un affaiblissement par estampage à chaud, par un rainurage ou par une opération de soudage de l'élément de recouvrement (14) au niveau de l'insert (16).
  13. Procédé selon l'une des revendications 10 à 12, caractérisé en ce que l'insert (16) possède au moins un prolongement de matière (54), en particulier un prolongement de matière (54) entourant l'ouverture (22), lequel fond pendant la fermeture de l'ouverture (22).
EP20815834.5A 2019-12-13 2020-12-02 Cartouche et procédé de fabrication d'une cartouche Active EP4072969B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19216089.3A EP3835230A1 (fr) 2019-12-13 2019-12-13 Cartouche et procédé de fabrication d'une cartouche
PCT/EP2020/084274 WO2021115878A1 (fr) 2019-12-13 2020-12-02 Cartouche et procédé de réalisation d'une cartouche

Publications (2)

Publication Number Publication Date
EP4072969A1 EP4072969A1 (fr) 2022-10-19
EP4072969B1 true EP4072969B1 (fr) 2023-06-28

Family

ID=68917297

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Application Number Title Priority Date Filing Date
EP19216089.3A Withdrawn EP3835230A1 (fr) 2019-12-13 2019-12-13 Cartouche et procédé de fabrication d'une cartouche
EP20815834.5A Active EP4072969B1 (fr) 2019-12-13 2020-12-02 Cartouche et procédé de fabrication d'une cartouche

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19216089.3A Withdrawn EP3835230A1 (fr) 2019-12-13 2019-12-13 Cartouche et procédé de fabrication d'une cartouche

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EP (2) EP3835230A1 (fr)
WO (1) WO2021115878A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4190715A1 (fr) * 2021-12-02 2023-06-07 Hilti Aktiengesellschaft Cartouche pour un dispositif d'extrusion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2655315B1 (fr) * 1989-12-01 1992-02-21 Cottin Andre Procede pour l'amelioration des flacons a presser et conteneurs souples distributeurs de produits pateux et semi-liquides.
JP3636052B2 (ja) * 2000-09-25 2005-04-06 サンスター技研株式会社 軟質容器の製造方法及び高粘調液充填体

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EP3835230A1 (fr) 2021-06-16
EP4072969A1 (fr) 2022-10-19

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