WO2021115834A1 - Cartouche et procédé de production d'une cartouche - Google Patents

Cartouche et procédé de production d'une cartouche Download PDF

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Publication number
WO2021115834A1
WO2021115834A1 PCT/EP2020/084023 EP2020084023W WO2021115834A1 WO 2021115834 A1 WO2021115834 A1 WO 2021115834A1 EP 2020084023 W EP2020084023 W EP 2020084023W WO 2021115834 A1 WO2021115834 A1 WO 2021115834A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
insert
cartridge
area
predetermined breaking
Prior art date
Application number
PCT/EP2020/084023
Other languages
German (de)
English (en)
Inventor
Ralf Willner
Tihomir Tapov
Sarah Freudling
Thomas Ayrle
Tobias Donner
Original Assignee
Hilti Aktiengesellschaft
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 Aktiengesellschaft filed Critical Hilti Aktiengesellschaft
Priority to EP20812088.1A priority Critical patent/EP4072968A1/fr
Publication of WO2021115834A1 publication Critical patent/WO2021115834A1/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

Definitions

  • the present invention relates to a cartridge for an extrusion 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 easily be applied to an object via the cartridges, provided that the cartridge is inserted into a corresponding ejection device.
  • the material can be precisely applied using the extrusion device. For example, a rod of the extrusion device presses against a bottom of the cartridge, whereby the volume of the cartridge is compressed, so that the material located 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.
  • Such a cartridge is known, for example, from DE 295 01 255 U1, the cartridge comprising a foil bag, the ends of which are each closed with a clip, and a head part for receiving the foil bag.
  • this cartridge has a piercing device with two piercing spades that pierce the foil pouch in order to open it.
  • the closure of the foil bag by clips is disadvantageous because, depending on the type of material used, a certain amount of leakage is released to the outside. This happens due to capillary forces that push the enclosed material outwards through the clips, or due to overpressure in the foil bag, which can arise at elevated temperatures.
  • the opening process of the film bag is structurally complex and may lead to an undefined opening of the film bag.
  • a further object of the invention is to provide a method for producing such a cartridge.
  • a cartridge for an extrusion device is proposed with at least one elongated film bag which is not inherently rigid and which has a chamber for receiving a mass and a head part for interaction with the film bag, the film bag having an opening on a side facing the head part, which is open from a cover is closed.
  • the cover has a predetermined breaking area.
  • the basic idea of the invention is to provide an improved cover that is easy to handle.
  • the cover securely closes the foil pouch and prevents unwanted leakage of the substance in the chamber from the chamber.
  • the cover enables a simple and safe and in particular defined opening in order to be able to dispense the mass located in the chamber.
  • the opening properties are improved by the predetermined breaking area, in particular when the cartridge is used in an extrusion device.
  • the cartridge Due to the predetermined breaking area in the cover, the cartridge can be opened in a particularly defined manner in an extrusion device with comparatively low forces.
  • the cover can be made so stable in a simple manner that self-opening of the cartridge is reliably prevented, for example in the event of an accidental fall.
  • the cover is designed in particular as a film, as an alternative to this, for example, it can also be designed in the form of a plate and, for example, represent a plastic plate.
  • the predetermined breaking area can easily have any shape and, depending on the application, be round, oval, square, rectangular, angular or linear, or have a combination of these shapes.
  • the chamber of the cartridge can be completely or exclusively delimited by foils.
  • 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.
  • the cover has a defined material discontinuity in the predetermined breaking area, at least in some areas, in particular in an entire flat area, than in another Area of coverage.
  • the cover is structurally simple and inexpensive to manufacture, with a safe and defined opening of the cover in the Sollbruchbe rich is enabled.
  • 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 some areas, than in a further area of the cover. This enables safe and defined opening of the cover in the predetermined breaking area.
  • Such a cover can also be produced simply 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 the cover to be opened reliably and in a defined manner in the predetermined breaking area.
  • a further area of the cover is understood here to mean an area of the cover that is not assigned to the predetermined breaking area and extends outside the defined predetermined breaking area. In the further area of the cover there are preferably essentially constant material properties.
  • the predetermined breaking area of the cover is delimited by a linear material weakening.
  • the linear material weakening particularly completely encompasses the predetermined breaking area and thus separates the predetermined breaking area from the further area of the cover.
  • the linear material weakening can be both a continuous, in particular uniform, material weakening as well as a perforation, the material thickness or the material strength of the linear material weakening being both less and greater 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. Provision can be made here for a different strength or a different structural structure to be provided in the predetermined breaking area completely or in an area encompassing the predetermined breaking area in a linear manner than in the further area of the cover. This can be achieved, for example, by the action of temperature, in particular by means of laser or energetic radiation.
  • the predetermined breaking area of the cover can preferably have a notch that is star-shaped, cross-shaped, line-like, circular, semicircular or the like.
  • the special geometry of the notch enables the pressure required to open the cartridge to be adjusted.
  • the shape and spatial arrangement of the notch can be used to influence the opening characteristics.
  • an inherently stiff insert is provided which is connected to the foil bag on the side facing the head part and has a passage, the cover being connected to the insert and closing the passage.
  • the inherently rigid insert gives the film bag greater rigidity in the area of the cover, and the use of the cover makes it easy to connect the cover to the rest of the film bag.
  • the insert is designed to be conical 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 attached to the insert under all conditions and is securely attached to the insert. Furthermore, undesired peeling or shearing off and / or damage to the cover, designed as a film for example, is reliably prevented as a result of the favorable introduction of force.
  • an upper surface of the insert facing the head part encloses an angle between 10 ° and 50 ° with a horizontal line arranged perpendicular to a central axis of the film bag, with an area of the surface facing the central axis having a greater distance to a bottom part of the film bag as a region of the surface facing away from the central axis.
  • the angle particularly preferably has a value between 15 ° and 35 °, in particular approximately 25 °.
  • the insert can have at least one ventilation opening independent of the passage and / or at least one ventilation slot independent of the passage.
  • the passage is in particular circular and, when the film bag is being filled, is preferably at least approximately close to a filling tube of a filling device.
  • the ventilation opening and / or the ventilation slot can be located in the chamber of the film bag Air can easily escape.
  • the ventilation opening and / or the ventilation slot can, after the filling process, be closed by the cover, in particular in a sealing manner, so that the mass located in the chamber is sealingly enclosed.
  • the passage of the insert can have at least one venting notch in an area facing the central axis of the film bag, so that when the film bag is being filled with a filling device that has a filling tube with a circular cross-section, there will be in the chamber of the film bag Air can escape through the vent notches directly along the fill tube.
  • Both the provision of the ventilation opening or the ventilation slot and the provision of ventilation notches prevents the occurrence of high pressures during a filling process, whereby the filling process can be carried out inexpensively.
  • a plurality of ventilation openings and / or ventilation slots are preferably provided, which in particular are arranged on the insert in a uniformly distributed manner around the circumference.
  • the ventilation openings have an essentially circular cross section.
  • the ventilation slots are preferably arranged essentially concentrically to a central axis of the insert.
  • the ventilation notches can have a substantially rectangular, triangular, curved or comparable shape.
  • the insert and the head part have, in areas facing each other, a respectively interacting and essentially oppositely executed contour, the cover arranged in the area of the contours being 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 in addition thereto, by means of a welding process.
  • a welding tool provided for this purpose preferably has a cylindrical recess essentially corresponding to the foil bag and can be guided around the foil bag in the direction of the insert from a side facing away from the head part, the welding tool being designed to cover at least in the area of the contours of the insert and to heat the head part in such a way that the insert can be welded to the head part by means of the cover.
  • the welding tool preferably engages around the respective foil bag on the outside.
  • the film bag can preferably be formed by a cylindrical film tube which is closed on the bottom side by a bottom part, the bottom part in particular being glued and / or welded to the film tube.
  • the film tube also called tubular film or blown film, can be formed from a thermoplastic material, wherein the film tube can be extruded or welded or glued at its longitudinal seam. Since the bottom part is particularly glued and / or welded, there is a cohesive connection, which improves the storage properties of the cartridge, so that a leakage rate of the cartridge is reduced compared to a cartridge in which a film bag is closed by a clip closure is.
  • the cartridge has, for example, a head part which comprises at least one receptacle for the at least one insert.
  • the head part is a kind of adapter, since the head part made light that commercially available attachments or standardized squeezing devices can be used to apply the mass located in the cartridge.
  • the insert which partially protrudes beyond the foil bag, thus represents an interface to the head part.
  • the insert has a stepped raised elevation on its side protruding from the film bag, via which the insert is received in the receptacle of the head part.
  • the survey enables a stable recording of the insert in the recording of the head part. In addition, this improves the tightness during operation.
  • the cover can rest on at least two, for example, substantially perpendicular to one another surfaces of the stepped raised elevation.
  • the cover can also be attached to the insert in a stable manner on the underside and in the receptacle of the head part on the top. Furthermore, this also reduces the leakage.
  • the head part has an outlet connection that is in fluid connection with the receptacle.
  • the outlet connection can define the flow rate, in particular via its diameter.
  • the outlet connection has a thread.
  • the thread can also have a partition which divides the volume into two or more outlet channels. The relative position of the partition wall in the outlet nozzle 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 to one another.
  • the head part can thus be suitable for receiving 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 connection after the outlet opening. This is important for two-component adhesives, for example.
  • the cartridge can thus accommodate different masses and serve as a multi-component pack.
  • the different diameters of the outlet openings make it possible to set a special mixing ratio for the different masses.
  • the masses located in the cartridge can be a chemical mass or a liquid, for example components of a two-component mixture.
  • sealing compounds multi-component mortars, multi-component coating compounds, multi-component paints, multi-component foam precursors, multi-component adhesives, multi-component sealing compounds and multi-component lubricants can be stored in the corresponding cartridges.
  • the receptacle of the head part can be assigned a spreading space into which the cover can spread out.
  • the expansion space enables the cover to be opened in a controlled manner so that it does not hinder the flow of the outflowing mass. On the one hand, this results in a laminar flow, as there are no fluxes in the flow path that could result in a turbulent flow. On the other hand, this ensures that the flow rate is precisely maintained, which is important for the mixing ratio of two or more components.
  • the passage is tapered. As the mass flows out, the passage acts like a cone or a nozzle.
  • the conically tapering passage can also 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 little or no air is left in the chamber.
  • the cartridge has at least one second, elongated film bag which is not inherently rigid and has a chamber for receiving a mass.
  • the cartridge can thus be used as a multi-component packaging. This means that a resin, for example an epoxy resin, and a hardener for a two-component adhesive can be stored in the same packaging.
  • the second foil pouch can have the same length as the first foil pouch, in which case a ratio of the base areas of the foil pouch determines a mixing ratio to be achieved.
  • a ratio of the base areas of the foil pouch determines a mixing ratio to be achieved.
  • two foil bags are used which have a length that deviates from one another.
  • the bottom part can be made of a plastic, such as, for example, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and / or acrylonitrile-butadiene-styrene copolymer (ABS).
  • a plastic such as, for example, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and / or acrylonitrile-butadiene-styrene copolymer (ABS).
  • PE polyethylene
  • PP polypropylene
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • ABS acrylonitrile-butadiene-styrene copolymer
  • the film pouch can comprise a mono- or multilayer film.
  • the total layer thickness is 50 to 350 gm, in particular 80 to 150 gm.
  • the materials used can be PE, PP, PET, aluminum, ethylene-vinyl alcohol copolymer (EVOH), polyamides (PA), and / or polylactides (PLA) be.
  • EVOH ethylene-vinyl alcohol copolymer
  • PA polyamides
  • PLA polylactides
  • a coating with silicon oxide or aluminum can also be provided for each layer.
  • the multilayer film can be produced by adhesive or extrusion lamination.
  • the film bag can preferably be evenly folded up during a squeezing-out process, similar to a concertina nica, so that as much as possible the entire mass in the chamber can be used.
  • the foil pouch is exposed to chemical substances or liquids which can sometimes attack the foil pouch.
  • An exact composition of the foil bag must therefore sometimes be adapted to the mass in the chamber or to the liquid in the chamber, in particular to the corresponding material properties.
  • the cover can preferably be designed as a multilayer film.
  • the cover has a PE and / or a PP layer on the top and bottom in order to be welded to other plastic parts of the cartridge, for example thermal mixed welded to be able to.
  • the film can also have layers of PVC, especially when other plastic parts of the cartridge are made of PVC.
  • a barrier layer can be provided between an upper side and an underside of the cover, which prevents, for example, the penetration of oxygen or water vapor into the chamber after it has been closed by the cover. In this way outgassing of the mass located in the chamber can also be reliably prevented.
  • the total thickness of the cover can be between 50 gm and 350 gm. In particular, it is provided that the total thickness is between 130 ⁇ m and 250 ⁇ m.
  • the barrier layer can 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
  • multilayer films are preferred.
  • the invention relates to a method for setting such a cartridge for an extrusion device by means of the following steps:
  • the technical advantages described for the cartridge apply analogously to the proposed method for Fierstellen the cartridge.
  • the freeing position of the filled cartridge can be separated into different freeing position steps.
  • the Fier ein of the foil bag is separated from the filling of the foil bag and the attachment of the foil 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 free position of the foil bag from the filling reduces the complexity of the free position of the cartridge. In this way, a better quality can be guaranteed, since different machines and materials can be used for filling and filling.
  • the predetermined breaking area of the cover can be produced, for example, before the production of the foil bag, after the production of the foil bag or during the production of the foil bag.
  • the predetermined breaking area is preferably only introduced into the cover after the mass 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, however, 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 of making two opposing predetermined breaking areas on the lower and
  • the film bag has a film tube and a bottom part, the film tube preferably being formed by welding or gluing.
  • the bottom part and a dimensionally stable insert are connected to the film tube, so that a film bag is created which comprises a chamber bounded by the film bag, the insert and the bottom part with the insert having a passage.
  • the bottom part can be designed, for example, with a film or with a dimensionally stable material.
  • 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 an Anrit zen with a suitable cutting tool or knife or during a welding process of the cover is made to the insert.
  • the predetermined breaking area has, in particular, a different material thickness and / or strength than other areas of the cover and a defined predetermined breaking area is thereby formed.
  • the insert has at least one material extension, in particular a material extension which surrounds the passage and which melts during the closure of the passage. The tightness is improved as a result of the fact that a material connection of the insert with the cover can be ensured due to the melt.
  • the material extension can surround the passage of the insert. It acts as the intended melting point of the insert so that a high quality cover is provided and no mass can escape from the chamber through the opening.
  • the insert can have at least one ventilation notch, a ventilation opening and / or a ventilation slot, via which air during can escape the filling.
  • 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 extrusion 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 can be provided.
  • the second foil pouch can be designed in a manner analogous to the first foil pouch and 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 different predetermined breaking areas, for example different notches.
  • FIG. 1 shows a longitudinal section through a cartridge according to the invention in a first embodiment in an exploded view
  • FIG. 2a shows a detailed view of the insert from FIG. 1 with a cover designed as a film in a longitudinal section;
  • FIG. 2b shows a detailed view of a further embodiment of an insert for connecting a cover designed as a film according to FIG. 2a in a longitudinal section;
  • FIG. 2c shows a detailed view of the insert according to FIG. 2b with a cover made as a plastic plate;
  • FIG. 3a shows a plan view of the cartridge from FIG. 1 with the predetermined breaking area
  • FIG. 3b shows a plan view of the cartridge from FIG. 1 with a further embodiment of the predetermined breaking area
  • FIG. 4 shows a schematic comparison which compares the chamber from FIG. 1 with a chamber known from the prior art and its squeezing behavior
  • FIG. 5 shows a schematic representation of the method according to the invention for positioning a cartridge according to the invention in a second embodiment
  • FIG. 6 shows a cartridge shown in simplified form and a filling device for filling a chamber of the cartridge according to FIG. 1 with a chemical compound
  • FIG. 9 shows a detailed view of a ventilation slot of the insert from FIG. 8.
  • FIG. 10 is a plan view of a further embodiment of the insert.
  • FIG. 11 shows a detailed view of a ventilation notch of the insert from FIG. 10; 12 shows an alternatively designed cartridge in which a film tube and a base part are welded to one another;
  • 13a shows a schematically shown structure of the cover
  • 13b shows a schematic structure of an alternatively designed cover
  • 14 shows a schematic structure of a further alternatively designed cover
  • FIG. 20 shows a side view and a top view of a further embodiment of a cartridge with two foil bags, the foil bags being jointly connected to the head part in a welding process;
  • FIG. 21 shows a side view and a top view of a further embodiment of a cartridge with two foil bags, the foil bags being connected separately to the head part in a welding process.
  • 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 bags 18.
  • the film bags 18 are not designed to be inherently rigid and each have a cylindrical and essentially elongated shape.
  • the foil bags 18 each delimit a chamber 20 and have an opening 22, the chamber 20 of the foil bag 18 in particular being able to be closed off.
  • the film bag 18 is formed by a bottom part 24 and a film tube 26.
  • the bottom part 24 has a base area 28 and a collar 30 extending around the base area 28.
  • the film tube 26 is attached on the outside to the collar 30 by welding or gluing. In principle, the film tube 26 can also be attached to the inside of the collar 30 by welding or gluing.
  • the film tube 26 can be produced, for example, from a film by gluing or welding edge areas. It can also be provided to use an already prefabricated film tube or a prefabricated film bag.
  • the base area 28 is, for example, circular, so that the chamber 20 is designed to be cylindrical. 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 on the inside through the opening 22 at least partially into the corresponding chamber 20 of an associated film bag 18.
  • 2a, 2b and 2c show different design variants of an insert 16 or a cover 14, the inserts 16 each being seen for connection to a film bag 18.
  • the insert 16 according to FIG. 2a has in one piece three sections 32, 34 and 36 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 adjoin one another in each case.
  • 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 a thickness D2 in the longitudinal direction L of ins- special less than 5 mm
  • the third section 36 has a thickness D3 in the longitudinal direction L of in particular special less than 5 mm.
  • 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 area 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 third section 36 has an outer side 42 facing away from the chamber 20 and comprising two surfaces 44 and 46.
  • the surface 46 is arranged in the longitudinal section parallel to the horizontal H and thus to the base surface 28, whereas the surface 44 in the longitudinal section has an angle d with respect to the vertical or the longitudinal direction, but in an alternative embodiment also essentially parallel to the vertical V. can be arranged.
  • the surfaces 44 and 46 can be arranged essentially perpendicular to one another in the longitudinal section.
  • FIG. 2b shows a further embodiment of the insert 16, which differs from the insert 16 according to FIG. 2a essentially in that the third section 36 has a conical region that encompasses the surface 46 and faces the head part 12.
  • the surface 46 facing the head part 12 forms an angle 8 of 10-50 ° with the horizontal H, particularly preferably of about 15 ° -35 °.
  • the surfaces 44 and 46 are not arranged perpendicular to each other in the longitudinal section and include an obtuse angle here.
  • the radially outer surface 42 of the third section 36 is arranged essentially in the longitudinal direction L.
  • the insert 16 shown in FIG. 2c essentially corresponds to the insert 16 according to FIG. 2b, the cover 14 being designed as a plastic plate in the exemplary embodiment shown.
  • the third section 36 of the inserts 16 according to FIGS. 2a and 2b is set back with respect to the outer side 42 with respect to the second section 34, the third section 36 having a smaller outer diameter than the second section 34.
  • a stepped raised 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 inwardly by a radial offset 52 of 2 to 4 mm with respect to the second section 34.
  • 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
  • the 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 of the first section 32 has an angle g between 0 and 10 ° with respect to the vertical V and the outside 42 of the third section 36 forms an angle d 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, tapers conically in the direction of the third section 36.
  • 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 inwardly pointing tip 64 of the third section 36 and run essentially in the longitudinal direction L here.
  • the insert 16 is designed in the shape of a ring, so that it can be coupled to the cylindrical foil hose 26.
  • the inside of the film tube 26 is connected to the insert 16, the film tube 26 being connected to the outside 42 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 can be seen from FIG. 1. In the assembled state of the cartridge 10, the cover 14 rests in radially outer regions on the stepped elevation 48, essentially on 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 closes the chamber 20, so that the chamber 20 is preferably completely sealed when the cover 14 is installed.
  • the head part 12 has two receptacles 66 which, in the assembled state, interact with the inserts 16 and the cover 14. On acquisition 66 is divided into two areas, as can also be seen from Fig. 3a.
  • the receptacle 66 is adapted to the insert 16 and the stepped raised elevation 48, so that the insert 16, as can be seen in FIG. 1, rests with the cover 14 on a side surface 70 of the receptacle 66, i.e. over its radially outwardly facing outer side 42, in particular that of the third section 36, and, as can be seen in Fig. 3a, rests on the support area 68, with the cover 14 in between.
  • the receptacle 66 comprises an expansion region 72 which is designed as a depression in the receptacle 66 and, as can be seen in FIG. 1, forms an expansion space 74, the function of which will be explained later.
  • the head part 12 furthermore has an outlet connection 76, with an outlet opening 78 and an outlet channel 80.
  • the outlet opening 78 is in fluid connection with the expansion space 74 and the receptacle 66 through the outlet channel 80.
  • the outlet port 76 shown in Fig. 1 has two outlet channels 80 which are in fluid communication with the respective receptacle 66 and are separated from each other by a partition 82, which extends from a connecting web 84 separating the receptacles 66 to the outlet opening 78 .
  • the two outlet channels 80 as shown in FIG. 1 and FIG. 3a Darge, 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 stub 76 also has a thread 86 by means of which an attachment, which cannot be seen, can be attached to the outlet opening 78 of the head part 12.
  • This attachment can be part of an extrusion device into which the cartridge 10 can be inserted or inserted.
  • the cover 14 comprises a predetermined breaking area 88 which, when the cartridge 10 is connected to the head part 12, is arranged in the area of the expansion area 72 of the receptacle 66.
  • the cover 14 has a lower material thickness or material strength in the predetermined breaking region 88 than in other regions of the cover. Due to the lower material thickness, the cover 14 is correspondingly weakened in areas in the predetermined breaking area 88.
  • the predetermined breaking area 88 can be generated in the cover 14, for example, by a laser or by a heated stamp.
  • the predetermined breaking area 88 can be generated, 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 generated 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 by means of a stamp or by melting material by means of a stamp. It can also be provided that a laser is used to vaporize material in the predetermined breaking area 88, in particular on a side facing away from the chamber 20, so that the predetermined breaking area 88 represents, for example, an externally visible notch in the cover 14. 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 scribing.
  • the predetermined breaking area 88 can also be generated by the above-mentioned method before the cover 14 is attached to the insert 16.
  • FIG. 3b shows a view comparable to FIG. 3a, only the differences being discussed below.
  • the predetermined breaking area 88 is here arranged in an area of the expansion area 72 which faces the respective other film bag 18.
  • the predetermined breaking area 88 represents, for example, a section of the weld seam 89, the predetermined breaking area 88 being at least regionally, in particular completely congruent with the welding seam 89.
  • the predetermined breaking area 88 can also be in the immediate vicinity of the weld 89.
  • the predetermined breaking area 88 is produced during the production of the weld seam 89 by varying 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 pressed out by an extrusion device, the cover 14 in the predetermined breaking area 88 tears or opens there in a defined manner.
  • the bottom part 24 of the chamber 20 is pressed, for example, in the direction of the head part 12 by means of a stamp of an ejection device. This leads to the fact that the pressure in the chamber 20, which is directed in the direction of the cover 14, increases, as a result of which the mass located in the chamber 20 is pressed against the cover 14. The cover 14 then expands into the expansion region 72.
  • the predetermined breaking area 88 of the cover 14 is assigned to the expansion area 72, the predetermined breaking area 88 breaking above a certain force or a corresponding pressure, so that the mass through the passage 60 of the insert 16 and the torn 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 be applied, for example, 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 assigned to 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% having.
  • 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 necessary to break up the predetermined breaking area 88 can be adapted 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 size of the predetermined breaking area 88.
  • the required opening force is increased if the predetermined breaking area 88 is displaced from a central area in an edge area of the expansion surface 72.
  • FIG. 4 shows a schematic comparison between the chamber 20 of the cartridge 10, which is arranged in the upper half of FIG. 4, and a chamber 92 of a cartridge 94 known from the prior art, which is arranged in the lower half of the figure , in a longitudinal section.
  • FIG. 4 shows the cartridges 10, 94 in a filled state and the right side of FIG. 4 shows the cartridges 10, 94 in a pressed out or emptied state.
  • the cartridges 10, 94 in the present example are enclosed by a cuboid 96 of 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 cartridge 94 from the prior art is closed on both sides by clips 98.
  • the clips 98 result in the chamber 92 being closed in a spherical shape 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 poured into the chamber 20 than into the chamber 92.
  • the chamber 20 of the squeezed out cartridge 10 is enclosed by a cuboid 100.
  • the cuboid 100 is smaller than the cuboid that encloses the squeezed out chamber 92 from the prior art, so that the squeezed out chamber 20 has a smaller volume than the squeezed out chamber 92 from the prior art. Accordingly, the cartridge 10 can accommodate more mass than the cartridge 94 known from the prior art with the same available initial volume according to cuboid 96 and less mass remains in the cartridge 10 after it has been pressed out compared to the cartridge 94 from the prior art .
  • FIGS. 5 and 6 which essentially corresponds to the embodiment described in more detail above, so that only the differences will be discussed below.
  • Identical components are provided with the same reference numerals, and reference is made to the above explanations with regard to their structure and their function.
  • the cartridge 10 in FIG. 5 has only one chamber 20, so that only one insert 16, one cover 14, one receptacle 66 and an outlet Entrance channel 80 are present. Accordingly, no partition 82 is provided, which divides the outlet channel 80 into partial channels.
  • a film tube 26 is then attached to the outside of the collar 30 on the circumferential side or circumferentially around the base part 24, for example by gluing or welding, so that a film bag 18 is produced 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 attached 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 compound 102 by a filling device 104 which has a filling head 106 and a filling tube 108.
  • the filling head 106 and the filling tube 108 are in fluid communication with one another.
  • the filling head 106 is connected, for example, to a reservoir of the mass 102 and pumps the mass 102 out of 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 mass 102 can be introduced from the filling head 106 through the filling tube 108 into the chamber 20.
  • 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 between tween the insert 16 and the chemical mass 102 is present after the filling process. This is advantageous since the presence of air can reduce the durability 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 film bags 18.
  • a material extension 54 which runs all the way around here and is connected to the third section 36 of the insert 16, can be provided, which can be designed in an annular manner. It is also possible to see several separate material extensions 54 which are, for example, partially annular and each only extend over a portion 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 in a materially bonded manner, in that the material extension 54 is melted.
  • the cover 14 is also attached to the surfaces 44 and 46 of the insert 16.
  • the molten material of the material extension 54 flows along the surfaces 44, 46 to form a type of adhesive layer for the cover 14.
  • the cover 14 can be designed as a monofilm. After the insert 16 has been closed, a part of the cover 14 is removed from the top of the cover 14, so that a predetermined breaking area 88 is created. This takes place, for example, in the closed state of the chamber 20, in that material of the cover 14 is removed from the outside.
  • the predetermined breaking area 88 can be formed by a defined setting of the welding parameters in a predefined area. For example, a higher pressure, an increased temperature or an extended welding duration or a combination of these parameters can be provided in order to produce the predetermined breaking area 88 during the welding process of the cover 14 to the insert 16.
  • the predetermined breaking area 88 can be produced in a simple manner in the immediate vicinity or in the surface 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 process step can be carried out, for example, by gluing or welding or a similar fastening process.
  • FIG. 7 shows the insert 16 in a longitudinal section in the upper area and a corresponding plan view of the insert 16 in a lower area.
  • the holes 62 are arranged as vent 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.
  • holes 62 are shown on the basis of FIGS. 8 to 11.
  • the top view of the insert 16 according to FIG. 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 to the central axis of the opening 63.
  • FIG. 9 shows a detailed view of one of the ventilation slots 116 from FIG. 8.
  • 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 designed as ventilation notches 122.
  • the ventilation notches 122 function as an enlargement of the opening 63, the original shape of which is shown in dashed lines in the area of the ventilation notches 122.
  • FIG. 11 A detailed view of a ventilation notch 122 is shown in FIG. 11, from which it can be seen that a width 124 of the ventilation notch 122 in the circumferential direction has a value in particular less than 4 mm.
  • FIG. 7a, 7b and 7c show further possible embodiments 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 not circular in contrast to the embodiment of the insert 16 according to FIG. 1.
  • the inner contour 123 represents an especially uniform polygon, here a dodecagon, in FIG. 7 b a sine wave ring and in FIG. 7 c a toothed wheel geometry.
  • FIGS. 13a, 13b and FIG. 13 show a further possibility of producing the film bag 18.
  • the inside of the collar 30 can also be fastened to the outside of the film tube 26.
  • the cover 14 can be designed as a monofilm.
  • configurations of the cover 14 are shown in which the cover 14 is formed by several layers or by a plastic plate.
  • 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 implemented as a polyethylene layer (PE layer) 128.
  • the top and bottom layers, i.e. H. the first layer and the fifth layer of the cover 14 are each designed as a polypropylene layer (PP layer) 130.
  • PP layer polypropylene layer
  • the barrier layer 126 prevents water vapor and / or oxygen from entering the chamber 20.
  • water vapor and / or oxygen can lead to the material arranged in the chamber 20 reacting and thereby reducing its durability or changing its composition.
  • the barrier layer 126 because of the barrier layer 126, the material located in the chamber 20 can advantageously not escape.
  • the middle layer is again designed as a barrier layer 126.
  • the first layer and the fifth layer 130 are also formed from polyethylene.
  • the configuration of the cover 14 in FIG. 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 configuration.
  • the second layer 132 is a layer 132 made of bi-axially arranged polypropylene.
  • the cover 14 can be designed with an in particular inherently rigid plastic plate, which preferably has PE, PP, PET, PVC, ABS, PA, PLA or comparable materials.
  • the cover 14 is in turn connected to the insert 16 by gluing or welding to the insert 16 of the embodiment of FIG. 2 or FIG. 2b.
  • FIGS. 13a, 13b and 14 are only to be understood as an example. 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.
  • the predetermined breaking area 88 is designed in several parts and in the present case has eight subareas, each of which extends radially outward from a center 134 to the center 134, so that the predetermined breaking area 88 forms a star-shaped pattern.
  • the predetermined breaking area 88 thus represents an overall symmetrical, here point-symmetrical, pattern.
  • the predetermined breaking area 88 has four partial areas, which in turn extend essentially in a straight line outward in the radial direction from the center 134, so that the predetermined breaking area represents a cross-shaped pattern, which here is symmetrical about the midpoint 134.
  • the predetermined breaking area 88 shown in FIG. 17 is formed by a line running in a straight line here.
  • the predetermined breaking area 88 is formed by a circular delimitation 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 further area of the cover 14 lying outside the line or the perforation.
  • the predetermined breaking area 88 is defined by an essentially semicircular line, which in turn can be designed 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 common welding process.
  • the inherently rigid insert 16 is first connected to the film bag 18 and then filled with a compound 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 here to be weldable on both sides, so that in a further step the film bags 18 are connected to the head part 12 in a welding process.
  • this is the case for both foil bags 18 with a common welding Tool 136 and in the embodiment according to FIG. 21 for each foil bag 18 with two separate welding tools 138, 140 and thus can be carried out independently of one another, one welding tool 138 being assigned to a foil bag 18 and the other welding tool 140 being assigned to the foil bag 18 on the other.
  • the inserts 16 have a corresponding counter-contour to the head part 12, so that the inserts 16, when connected to the head part 12, lie essentially flat on the head part 12 via the cover 14.
  • the respective welding tool 136, 138, 140 shown only schematically in FIGS. 20 and 21, is guided from a side facing away from the head part 12 via the film bag 18 to a contact area of the head part 12 with the insert 16, the welding tools 138 , 140 completely encompass the respective film bag 18 and the corresponding contours of the insert 16 and the head part 12 in the embodiment according to FIG. 21, so that a connection between the head part 12 and the film bag 18 over the cover 14 is created around the entire circumference .
  • the connections of the two foil bags 18 to the head part 12 can be carried out simultaneously, partially overlapping or one after the other.
  • the common welding tool 140 with which the connection of the two film bags 18 to the head part 12 is possible in a single work step, comprises the film bags 18 on the circumferential side, for example except for a facing Be of the film bags 18, so that a on the outside around both foil bags 18 completely umlau fende connection between the head part 12 and the two foil bags 18 via the respective covers is created. It can be provided here that the inserts 16 are not connected to the head part 12 via the covers 14 in an area of the two film bags 18 facing one another.
  • an inductive and contactless welding process for example a floch frequency welding process
  • the cover 14 preferably has an aluminum layer which is heated during the welding process, the heat being conducted through the other layers of the cover 14 to the inserts, in particular made of plastic, and the head part 12, thereby achieving the weld.
  • a very targeted energy input is achieved at the point at which the welded connection is to be created.
  • the cartridge 10 comprises one or two chambers 20 and a corresponding number of covers 14, inserts 16, foil bags 18, receptacles 66 and outlet channels 80. In general, any number of the named components is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Tubes (AREA)
  • Packages (AREA)

Abstract

La présente invention concerne une cartouche (10) pour un dispositif de pressage, comprenant au moins un sachet en film allongé (18) qui n'est pas intrinsèquement rigide, ledit sachet en film comportant une chambre (20) destinée à recevoir un composé (102), et une partie tête (12) destinée à interagir avec le sachet en film (18), le sachet en film (18) ayant une ouverture sur un côté orienté vers la partie tête (12), ladite ouverture étant fermée par un couvercle (14). Le couvercle (14) comporte une région de rupture prédéfinie (88). L'invention concerne en outre un procédé de fabrication d'une telle cartouche (10).
PCT/EP2020/084023 2019-12-13 2020-12-01 Cartouche et procédé de production d'une cartouche WO2021115834A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20812088.1A EP4072968A1 (fr) 2019-12-13 2020-12-01 Cartouche et procédé de production d'une cartouche

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19216079.4 2019-12-13
EP19216079.4A EP3835229A1 (fr) 2019-12-13 2019-12-13 Cartouche et procédé de fabrication d'une cartouche

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WO2021115834A1 true WO2021115834A1 (fr) 2021-06-17

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WO (1) WO2021115834A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29501255U1 (de) 1995-01-27 1995-03-09 Hilti Ag, Schaan Folienbeutelpackung mit Folienbeutel und Bodenteil
EP1331174A1 (fr) * 2000-09-25 2003-07-30 Sunstar Engineering Inc. Contenant mou et procede de fabrication du contenant, et corps rempli d'un liquide conditionne a tres forte viscosite
EP2511194A2 (fr) * 2011-04-15 2012-10-17 HILTI Aktiengesellschaft Cartouche plastique et procédé de fabrication d'une cartouche plastique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29501255U1 (de) 1995-01-27 1995-03-09 Hilti Ag, Schaan Folienbeutelpackung mit Folienbeutel und Bodenteil
EP1331174A1 (fr) * 2000-09-25 2003-07-30 Sunstar Engineering Inc. Contenant mou et procede de fabrication du contenant, et corps rempli d'un liquide conditionne a tres forte viscosite
EP2511194A2 (fr) * 2011-04-15 2012-10-17 HILTI Aktiengesellschaft Cartouche plastique et procédé de fabrication d'une cartouche plastique

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EP3835229A1 (fr) 2021-06-16
EP4072968A1 (fr) 2022-10-19

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