EP0299433B1 - Device for mixing or homogeneiring the content of a cartridge - Google Patents

Device for mixing or homogeneiring the content of a cartridge Download PDF

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Publication number
EP0299433B1
EP0299433B1 EP88111145A EP88111145A EP0299433B1 EP 0299433 B1 EP0299433 B1 EP 0299433B1 EP 88111145 A EP88111145 A EP 88111145A EP 88111145 A EP88111145 A EP 88111145A EP 0299433 B1 EP0299433 B1 EP 0299433B1
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EP
European Patent Office
Prior art keywords
mixing
piston
cartridge
rod
set forth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88111145A
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German (de)
French (fr)
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EP0299433A1 (en
Inventor
Werner Brüning
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.)
Alfred Fischbach KG Kunststoff Spritzgusswerk
Original Assignee
Alfred Fischbach KG Kunststoff Spritzgusswerk
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Application filed by Alfred Fischbach KG Kunststoff Spritzgusswerk filed Critical Alfred Fischbach KG Kunststoff Spritzgusswerk
Priority to AT88111145T priority Critical patent/ATE73095T1/en
Publication of EP0299433A1 publication Critical patent/EP0299433A1/en
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Publication of EP0299433B1 publication Critical patent/EP0299433B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3255—Containers provided with a piston or a movable bottom, and permitting admixture within the container

Definitions

  • the invention relates to a mixing device for mixing and homogenizing pasty or flowable masses according to the preamble of claim 1.
  • Pasty or flowable masses often have to be mixed or homogenized before processing. Mixing is particularly necessary if the masses consist of several components, e.g. made of synthetic resin and hardener, which are brought together immediately before processing. Such compositions are used, for example, as sealants or adhesives or as plastic impression compositions.
  • Mixing devices which contain several components in different compartments separated from one another. Before the mixing, the compartments are connected to one another, or a partition located between the compartments is destroyed or eliminated, so that the components are connected to one another Can come in contact.
  • the masses in a cartridge are then processed with a mixing element which has a rod which leads out of the cartridge and which can be axially moved and rotated by hand. The mass contained in the cartridge can then be pressed out of the cartridge by moving a piston.
  • a mixing device with the features specified in the preamble of claim 1 is known from FR-A-2 447 875.
  • This mixing device has a mixing element which is fixedly connected to a rod and which can be moved in the longitudinal direction inside a cartridge and can be rotated around it to mix the cartridge contents.
  • a piston which is hollow on the inside and into which a locking element of the mixing element can be drawn in, so that the piston forms a unit with the mixing element which can be advanced by moving the shaft to squeeze out the contents of the cartridge.
  • This mixing device can not be used in conjunction with the usual squeezing devices that have a plunger for advancing the piston.
  • the shaft which is firmly connected to the mixing element, protrudes far from the rear end of the cartridge when the cartridge is still filled. For this reason, the known mixing device also requires a lot of space when the cartridge is filled with flowable mass and the shaft protrudes from it.
  • the invention has for its object to provide a mixing device of the type specified in the preamble of claim 1, which is characterized by a particularly simple structure and simple handling.
  • the mixing element is connected through the piston to the rod required for its actuation.
  • the mixing element is moved back and forth in the axial direction of the cartridge, whereby it can be rotated about its longitudinal axis at the same time.
  • the mixing element is placed against the end wall of the piston and the rod is separated from the mixing element while the mixing element is held by the piston.
  • the mixing element forms together with the piston a single unit that can be used to squeeze the mixture out of the cartridge.
  • commercially available squeezing devices can be used, which are common for squeezing sealants out of cartridges.
  • a particular advantage is that the conventional tubular cartridges can be used without any modification.
  • the mixing element which can be moved separately from the piston during the mixing process, is connected to the piston after the mixing process has ended.
  • the mixing element closes the passage opening of the piston so that the end wall of the piston is now tight.
  • the mixing element is, as it were, part of the piston and is not moved independently during the subsequent pressing process.
  • the piston is to a certain extent only completed by the mixing element attached to it.
  • the piston serves to close the cartridge and as a guide and sealing element for the rod.
  • the mixing element can also be connected to the piston if the rod is not yet connected to the mixing element.
  • the rod is connected to the mixing element, which is held in place by the piston.
  • the connection of the mixing element to the piston is released, so that the mixing element can carry out the mixing process unimpeded, while the passage opening of the piston seals against the rod and prevents that no mass can escape from the cartridge along the rod.
  • the mixing element is expediently provided with a hollow shaft which is received in a sealing manner by a sleeve which projects from the front piston surface to the rear.
  • the shaft has the same outer diameter as the rod that can be connected to it.
  • the connection between the rod and the hollow shaft is preferably made by threads, in particular by multi-start threads.
  • the mixing element has a flat disc with openings and wings.
  • the wings can be swung out of the plane of the window and the edges of two wings facing or facing each other are expediently connected to the window in an articulated manner.
  • the vanes which are pivoted as a function of the axial direction of movement of the mixing member through the pasty mass, each adjust so that when the mixing member rotates in one direction of rotation, one of the two vanes cut helically through the mass, while the other wing offers increased flow resistance. In this way it is ensured that the mixing element cannot cut through the mass in a helical manner with little resistance, but that at least one of the wings exerts a considerable agitation effect on the mass.
  • the mixing device according to the invention can be used to homogenize a mass contained in the cartridge before use. In this case, the entire mass is contained in the cartridge. Another application is to mix multiple components. In this case, the component which is to form the larger proportion of the mixture is expediently already contained in the cartridge, while the other component is supplied later. The smaller component can be fed through the spout in the end wall of the cartridge that will later be used for pressing. This spout must of course be closed with a cap during the mixing process.
  • the mixing device shown has a commercially available cartridge 10, which consists of a plastic injection molded part, can consist of metal or paper material.
  • the cartridge 10 is designed as an elongated cylindrical tube, which is closed at one end by an end wall 11, while the opposite end 12 is open.
  • On the end wall 11 there is an externally threaded spout 13 through which the mass can be expelled from the cartridge. In the state shown, the spout 13 is closed with a separable wall 14.
  • the cartridge 10 contains a piston 15, the cylindrical peripheral wall 16 of which rests sealingly on the inner wall of the cartridge.
  • the front piston surface 16a forming the end wall is flat and from it the peripheral wall 16, an annular reinforcement wall 17 and a sleeve 18 protrude to the rear or to the outside.
  • the peripheral wall 16 projects beyond the reinforcement wall 17 and the sleeve 18 towards the rear end. All three walls 16, 17 and 18 are connected to the piston wall 16a only at their front end, while the rear ends protrude freely.
  • the sleeve 18 encloses the passage opening 19 which leads axially through the piston 15.
  • the edge of the cartridge at the end 12 is deformed in such a way that a stop 12a which holds the piston in the cartridge is formed.
  • the cartridge is filled through the opened spout 13, the wall 14 of which is separated.
  • the passage opening 19 of the piston 15 is closed by the mixing element 20.
  • the mixing element 20 has a perforated disk 21 which lies flat against the piston wall 16 and whose outer diameter is somewhat smaller than that of the piston 15.
  • a hollow shaft 22 protrudes from the rear of the disk 21. This shaft 22 completely and sealingly fills the cross section of the sleeve 19. Inside the shaft 22 there is an internal thread into which the threaded connector 23a is screwed at the front end of the rod 23.
  • the threads of shaft 22 and threaded connector 23a are two-start threads. This has the advantage that finding a thread engagement by turning the rod 23 is easier and that the threads can be tightened more quickly.
  • the shaft 22 does not extend to the rear end of the sleeve 18.
  • the main part of the rod 23, whose diameter is equal to that of the shaft 22, projects into this end behind the threaded connector 23a.
  • the disk 21 has a plurality of openings 24, 25, 26.
  • the openings 24 and 25 contain wings 27 and 28, which are integrally connected to the disc 21 by film joints 29 and 30, respectively.
  • the film joints 29 are located on the radial edges leading in the clockwise direction, while the film joints 30 are arranged on the wings 28 in each case on the radial edge leading in the counterclockwise direction.
  • the openings 26 are simple holes.
  • Each recess 31 can cooperate with a holding member 32 of the piston 15.
  • the holding member 32 is a projection protruding forward from the piston surface 16a, which protrudes into a recess 31 when the disk 21 is in contact with the piston surface 16a.
  • the holding member 32 forms a rotation lock, which prevents the disk 21 from being rotated relative to the piston 15. It is thus possible to unscrew the rod 23 from the mixing element 20 while the mixing element is held against rotation by the holding element 32 of the piston 15.
  • the piston 15 is supported in the interior of the cartridge 10 by its peripheral wall 16, the rotational resistance being so great that the piston 15 is not rotated within the cartridge 10 when the rod 23 is rotated.
  • the projection can have a sawtooth-shaped course, so that the mixing element 20 is blocked relative to the piston 15 only in one direction of rotation, but can rotate in the other.
  • the holding member 32 should prevent the mixing member 20 from rotating.
  • the mixing device is supplied in the state shown in FIG. 1, but without a screwed-in shaft 23, it being possible for the mass to be pressed out or one component of this mass to be located inside the cartridge 10.
  • the wall 14 of the spout 13 can first be cut off in order to introduce the additional component into the cartridge 10. Then the spout 13 is closed with a screw cap (not shown). Now only the rod 23 needs to be screwed into the shaft 22 of the mixing element. The rod 23 can then be driven with a prime mover, e.g. a hand drill, which rotates the rod and with this the mixing element 20. During this rotation, the threads of threaded connector 23a and shaft 22 tighten. The rod 23 can now be moved axially through the cartridge 10, all areas of the cartridge being affected by the mixing action. The wings 27, 28 of the mixing element 20 automatically adjust themselves so that they point to the rear in relation to the axial movement.
  • a prime mover e.g. a hand drill
  • the mixing member 20 is withdrawn until it abuts the piston surface 16.
  • the rod 23 is then rotated counter to its previous direction of rotation in order to release the threaded engagement with the mixing element 20.
  • the mixing element 20 is supported on the holding element 32.
  • the shaft 22 seals the passage opening 19 of the piston 15.
  • the mixing element 20 has an axial extension 33 which protrudes towards the front and can penetrate into the interior of the spout 13 during mixing in order to also move the mass located in the spout.
  • the approach 33 has a non-circular cross-section; in the present exemplary embodiment, it consists of three star-shaped ribs. When the cartridge is pressed out, the attachment 33 displaces material from the spout 13.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Package Specialized In Special Use (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

PCT No. PCT/EP88/00631 Sec. 371 Date Jan. 18, 1989 Sec. 102(e) Date Jan. 18, 1989 PCT Filed Jul. 12, 1988 PCT Pub. No. WO89/00536 PCT Pub. Date Jan. 26, 1989.The mixing device is used for mixing multicomponent materials or for homogenizing compositions which are contained in a cartridge (10) which is closed by a piston (15) having a passage opening (19). The latter is primarily closed by the shaft (22) of a mixing member (20). Said shaft (22) may be coupled to a rod (23). By a drive or by manual operation, the rod (23) may be rotated and moved axially at the same time. While the piston (15) stays, where it is, the mixing member (20) is moved through the cartridge (10). Upon termination of the mixing operation, the mixing member (20) is locked at the piston (15) by a holding member (32) in order to unscrew the rod (23) from the mixing member. Subsequently, the cartridge may be inserted into a squeezing tool in which the piston (15) is advanced for squeezing out the composition.

Description

Die Erfindung betrifft eine Mischvorrichtung zum Mischen und Homogenisieren pastöser oder fließfähiger Massen nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a mixing device for mixing and homogenizing pasty or flowable masses according to the preamble of claim 1.

Pastöse oder fließfähige Massen müssen oftmals vor ihrer Verarbeitung gemischt oder homogenisiert werden. Eine Mischung ist insbesondere dann erforderlich, wenn die Massen aus mehreren Komponenten bestehen, z.B. aus Kunstharz und Härter, die unmittelbar vor der Verarbeitung zusammengeführt werden. Solche Massen werden beispielsweise als Dichtungsmittel oder Kleber oder als plastische Abdruckmassen benutzt.Pasty or flowable masses often have to be mixed or homogenized before processing. Mixing is particularly necessary if the masses consist of several components, e.g. made of synthetic resin and hardener, which are brought together immediately before processing. Such compositions are used, for example, as sealants or adhesives or as plastic impression compositions.

Bekannt sind Mischvorrichtungen, die mehrere Komponenten in unterschiedlichen Abteilen getrennnt voneinander enthalten. Vor der Vermischung werden die Abteile miteinander verbunden bzw. es wird eine zwischen den Abteilen befindliche Trennwand zerstört oder beseitigt, so daß die Komponenten miteinander in Kontakt kommen können. Danach werden die in einer Kartusche befindlichen Massen mit einem Mischorgan bearbeitet, das eine aus der Kartusche herausführende Stange aufweist, welche von Hand axial bewegt und gedreht werden kann. Anschließend kann die in der Kartusche enthaltene Masse durch Bewegen eines Kolbens aus der Kartusche herausgepreßt werden.Mixing devices are known which contain several components in different compartments separated from one another. Before the mixing, the compartments are connected to one another, or a partition located between the compartments is destroyed or eliminated, so that the components are connected to one another Can come in contact. The masses in a cartridge are then processed with a mixing element which has a rod which leads out of the cartridge and which can be axially moved and rotated by hand. The mass contained in the cartridge can then be pressed out of the cartridge by moving a piston.

Eine Mischvorrichtung mit den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen ist bekannt aus FR-A-2 447 875. Diese Mischvorrichtung weist ein mit einer Stange fest verbundenes Mischorgan auf, das im Inneren einer Kartusche in Längsrichtung bewegbar ist und dabei gedreht werden kann, um den Kartuscheninhalt zu durchmischen. In der Kartusche ist ferner ein Kolben angeordnet, der innen hohl ist und in den ein Verriegelungselement des Mischorgans eingezogen werden kann, so daß der Kolben mit dem Mischorgan eine Einheit bildet, die durch Bewegen des Schafts zum Auspressen des Kartuscheninhalts vorgeschoben werden kann. Diese Mischvorrichtung kann nicht in Verbindung mit den üblichen Auspreßgeräten verwendet werden, die einen Stößel zum Vorschieben des Kolbens aufweisen. Der mit dem Mischorgan fest verbundene Schaft steht aus dem rückwärtigen Ende der Kartusche weit heraus, wenn die Kartusche noch im gefüllten Zustand ist. Aus diesem Grund benötigt die bekannte Mischvorrichtung auch viel Platz, wenn die Kartusche mit fließfähiger Masse gefüllt ist und der Schaft aus ihr herausragt.A mixing device with the features specified in the preamble of claim 1 is known from FR-A-2 447 875. This mixing device has a mixing element which is fixedly connected to a rod and which can be moved in the longitudinal direction inside a cartridge and can be rotated around it to mix the cartridge contents. In the cartridge there is also a piston which is hollow on the inside and into which a locking element of the mixing element can be drawn in, so that the piston forms a unit with the mixing element which can be advanced by moving the shaft to squeeze out the contents of the cartridge. This mixing device can not be used in conjunction with the usual squeezing devices that have a plunger for advancing the piston. The shaft, which is firmly connected to the mixing element, protrudes far from the rear end of the cartridge when the cartridge is still filled. For this reason, the known mixing device also requires a lot of space when the cartridge is filled with flowable mass and the shaft protrudes from it.

Aus US-A-3 858 853 ist eine Mischvorrichtung bekannt, bei der das rückwärtige Ende der Kartusche mit einem bewegbaren Kolben verschlossen ist und die ein Mischorgan aufweist, welches mit einer durch eine Öffnung des Kolbens hindurchführenden Stange lösbar verbunden ist. Nach dem Lösen der Stange muß die Kolbenöffnung mit einem Klebeband verschlossen werden, damit der Kolben zum Auspressen des Kartuscheninhalts benutzt werden kann.From US-A-3 858 853 a mixing device is known in which the rear end of the cartridge is closed with a movable piston and which has a mixing element which is detachably connected to a rod which passes through an opening in the piston is. After releasing the rod, the piston opening must be sealed with an adhesive tape so that the piston can be used to squeeze out the contents of the cartridge.

Der Erfindung liegt die Aufgabe zugrunde, eine Mischvorrichtung der im Oberbegriff des Patentanspruchs 1 angegebenen Art zu schaffen, die sich durch einen besonders einfachen Aufbau und durch eine einfache Handhabung auszeichnet.The invention has for its object to provide a mixing device of the type specified in the preamble of claim 1, which is characterized by a particularly simple structure and simple handling.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmalen.This object is achieved according to the invention with the features specified in the characterizing part of patent claim 1.

Nach der Erfindung ist das Mischorgan durch den Kolben hindurch mit der zu seiner Betätigung erforderlichen Stange verbunden. Zum Mischen wird das Mischorgan in Achsrichtung der Kartusche hin- und herbewegt, wobei es gleichzeitig um seine Längsachse gedreht werden kann. Nach Beendigung des Mischvorgangs wird das Mischorgan gegen die Stirnwand des Kolbens gelegt, und die Stange wird von dem Mischorgan abgetrennt, während das Mischorgan von dem Kolben festgehalten wird. Nach Beendigung des Trennvorgangs bildet das Mischorgan zusammen mit dem Kolben eine einzige Einheit, die zum Auspressen der Mischung aus der Kartusche verwendet werden kann. Hierzu können handelsübliche Auspreßgeräte verwendet werden, die zum Auspressen von Dichtungsmassen aus Kartuschen üblich sind.According to the invention, the mixing element is connected through the piston to the rod required for its actuation. For mixing, the mixing element is moved back and forth in the axial direction of the cartridge, whereby it can be rotated about its longitudinal axis at the same time. After the mixing process is complete, the mixing element is placed against the end wall of the piston and the rod is separated from the mixing element while the mixing element is held by the piston. After the separation process, the mixing element forms together with the piston a single unit that can be used to squeeze the mixture out of the cartridge. For this purpose, commercially available squeezing devices can be used, which are common for squeezing sealants out of cartridges.

Ein besonderer Vorteil besteht darin, daß die üblichen rohrförmigen Kartuschen ohne jegliche Modifizierung verwendbar sind. Das Mischorgan, das während des Mischvorgangs getrennt vom Kolben bewegbar ist, wird nach Beendigung des Mischvorgangs mit dem Kolben verbunden. Dabei verschließt das Mischorgan die Durchtrittsöffnung des Kolbens, so daß die Stirnwand des Kolbens nunmehr dicht ist. Nachdem die Stange vom Mischorgan abgetrennt worden ist, ist das Mischorgan gewissermaßen Bestandteil des Kolbens und wird bei dem nachfolgenden Auspreßvorgang nicht selbständig bewegt. Der Kolben wird gewissermaßen durch das an ihm befestigte Mischorgan erst vervollständigt. Während des Mischvorgangs dient der Kolben zum Verschluß der Kartusche und als Führungs- und Dichtungsorgan für die Stange. Im Lieferzustand kann das Mischorgan ebenfalls mit dem Kolben verbunden sein, falls die Stange noch nicht mit dem Mischorgan verbunden ist. Zur Durchführung des Mischvorgangs wird die Stange mit dem Mischorgan verbunden, das hierbei vom Kolben festgehalten wird. Durch axiales Vorschieben der Stange wird die Verbindung des Mischorgans mit dem Kolben aufgehoben, so daß das Mischorgan den Mischvorgang ungehindert durchführen kann, während die Durchgangsöffnung des Kolbens gegenüber der Stange abdichtet und verhindert, daß keine Masse entlang der Stange aus der Kartusche austreten kann.A particular advantage is that the conventional tubular cartridges can be used without any modification. The mixing element, which can be moved separately from the piston during the mixing process, is connected to the piston after the mixing process has ended. The mixing element closes the passage opening of the piston so that the end wall of the piston is now tight. After the rod has been separated from the mixing element, the mixing element is, as it were, part of the piston and is not moved independently during the subsequent pressing process. The piston is to a certain extent only completed by the mixing element attached to it. During the mixing process, the piston serves to close the cartridge and as a guide and sealing element for the rod. In the delivery state, the mixing element can also be connected to the piston if the rod is not yet connected to the mixing element. To carry out the mixing process the rod is connected to the mixing element, which is held in place by the piston. By axially advancing the rod, the connection of the mixing element to the piston is released, so that the mixing element can carry out the mixing process unimpeded, while the passage opening of the piston seals against the rod and prevents that no mass can escape from the cartridge along the rod.

Zweckmäßigerweise ist das Mischorgan mit einem hohlen Schaft versehen, der von einer von der vorderen Kolbenfläche nach hinten abstehenden Hülse abdichtend aufgenommen wird. Der Schaft hat den gleichen Außendurchmesser wie die mit ihm verbindbare Stange. Die Verbindung zwischen Stange und hohlem Schaft erfolgt vorzugsweise durch Gewinde, insbesondere durch mehrgängige Gewinde.The mixing element is expediently provided with a hollow shaft which is received in a sealing manner by a sleeve which projects from the front piston surface to the rear. The shaft has the same outer diameter as the rod that can be connected to it. The connection between the rod and the hollow shaft is preferably made by threads, in particular by multi-start threads.

Das Mischorgan weist eine flache Scheibe mit Durchbrechungen und Flügeln auf. Die Flügel sind aus der Scheibenebene ausschwenkbar und zweckmäßigerweise sind die einander zugewandten oder die einander abgewandten Kanten zweier Flügel gelenkig mit der Scheibe verbunden. Die Flügel, die in Abhängigkeit von der axialen Bewegungsrichtung des Mischorgans durch die pastöse Masse verschwenkt werden, stellen sich jeweils so ein, daß bei Drehung des Mischorgans in der einen Drehrichtung einer der beiden genannten Flügel sich schraubenförmig durch die Masse schneidet, während der andere Flügel einen erhöhten Strömungswiderstand bietet. Auf diese Weise wird sichergestellt, daß das Mischorgan sich nicht mit geringem Widerstand schraubenförmig durch die Masse hindurchschneiden kann, sondern daß mindestens einer der Flügel eine erhebliche Agitationswirkung auf die Masse ausübt.The mixing element has a flat disc with openings and wings. The wings can be swung out of the plane of the window and the edges of two wings facing or facing each other are expediently connected to the window in an articulated manner. The vanes, which are pivoted as a function of the axial direction of movement of the mixing member through the pasty mass, each adjust so that when the mixing member rotates in one direction of rotation, one of the two vanes cut helically through the mass, while the other wing offers increased flow resistance. In this way it is ensured that the mixing element cannot cut through the mass in a helical manner with little resistance, but that at least one of the wings exerts a considerable agitation effect on the mass.

Die erfindungsgemäße Mischvorrichtung kann zum Homogenisieren einer in der Kartusche enthaltenen Masse vor Gebrauch benutzt werden. In diesem Fall ist die gesamte Masse in der Kartusche enthalten. Eine andere Anwendung besteht in der Verwendung zum Mischen mehrerer Komponenten. Hierbei ist zweckmäßigerweise diejenige Komponente, die den größeren Anteil des Gemisches bilden soll, bereits in der Kartusche enthalten, während die andere Komponente später zugeführt wird. Das Zuführen der kleineren Komponente kann durch die später zum Auspressen benutzte Tülle in der Kartuschenstirnwand hindurch erfolgen. Diese Tülle muß während des Mischvorgangs natürlich mit einer Verschlußkappe verschlossen werden.The mixing device according to the invention can be used to homogenize a mass contained in the cartridge before use. In this case, the entire mass is contained in the cartridge. Another application is to mix multiple components. In this case, the component which is to form the larger proportion of the mixture is expediently already contained in the cartridge, while the other component is supplied later. The smaller component can be fed through the spout in the end wall of the cartridge that will later be used for pressing. This spout must of course be closed with a cap during the mixing process.

Im folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.An exemplary embodiment of the invention is explained in more detail below with reference to the drawings.

Es zeigen:

Fig. 1
einen Längsschnitt durch die Mischvorrichtung,
Fig. 2
einen Schnitt entlang der Linie II-II von Fig. 1,
Fig. 3
einen Schnitt entlang der Linie III-III von Fig. 1 und
Fig. 4
eine perspektivische Darstellung des Mischorgans.
Show it:
Fig. 1
a longitudinal section through the mixing device,
Fig. 2
2 shows a section along the line II-II of FIG. 1,
Fig. 3
a section along the line III-III of Fig. 1 and
Fig. 4
a perspective view of the mixing element.

Die dargestellte Mischvorrichtung weist eine handelsübliche Kartusche 10 auf, die aus einem Kunststoffspritzteil, aus Metall oder Papiermaterial bestehen kann. Die Kartusche 10 ist als langgestrecktes zylindrisches Rohr ausgebildet, das an seinem einen Ende durch eine Stirnwand 11 verschlossen ist, während das gegenüberliegende Ende 12 offen ist. An der Stirnwand 11 befindet sich eine mit Außengewinde versehene Tülle 13, durch die hindurch die Masse aus der Kartusche ausgetrieben werden kann. Im dargestellten Zustand ist die Tülle 13 mit einer abtrennbaren Wand 14 verschlossen.The mixing device shown has a commercially available cartridge 10, which consists of a plastic injection molded part, can consist of metal or paper material. The cartridge 10 is designed as an elongated cylindrical tube, which is closed at one end by an end wall 11, while the opposite end 12 is open. On the end wall 11 there is an externally threaded spout 13 through which the mass can be expelled from the cartridge. In the state shown, the spout 13 is closed with a separable wall 14.

Die Kartusche 10 enthält einen Kolben 15, dessen zylindrische Umfangswand 16 abdichtend an der Innenwand der Kartusche anliegt. Die die Stirnwand bildende vordere Kolbenfläche 16a ist plan und von ihr stehen die Umfangswand 16, eine ringförmige Verstärkungswand 17 und eine Hülse 18 nach hinten bzw. außen ab. Die Umfangswand 16 überragt die Verstärkungswand 17 und die Hülse 18 zum rückwärtigen Ende hin. Alle drei Wände 16,17 und 18 sind nur an ihrem vorderen Ende mit der Kolbenwand 16a verbunden, während die rückwärtigen Enden frei abstehen. Die Hülse 18 umschließt die Durchtrittsöffnung 19, die axial durch den Kolben 15 hindurchführt.The cartridge 10 contains a piston 15, the cylindrical peripheral wall 16 of which rests sealingly on the inner wall of the cartridge. The front piston surface 16a forming the end wall is flat and from it the peripheral wall 16, an annular reinforcement wall 17 and a sleeve 18 protrude to the rear or to the outside. The peripheral wall 16 projects beyond the reinforcement wall 17 and the sleeve 18 towards the rear end. All three walls 16, 17 and 18 are connected to the piston wall 16a only at their front end, while the rear ends protrude freely. The sleeve 18 encloses the passage opening 19 which leads axially through the piston 15.

Nach dem Einbringen des Kolbens 15 durch das offene Ende 12 in die Kartusche 10 wird der Kartuschenrand am Ende 12 so deformiert, daß ein den Kolben in der Kartusche festhaltender Anschlag 12a entsteht. Das Befüllen der Kartusche erfolgt durch die geöffnete Tülle 13 hindurch, deren Wand 14 abgetrennt wird.After the piston 15 has been introduced into the cartridge 10 through the open end 12, the edge of the cartridge at the end 12 is deformed in such a way that a stop 12a which holds the piston in the cartridge is formed. The cartridge is filled through the opened spout 13, the wall 14 of which is separated.

Die Durchtrittsöffnung 19 des Kolbens 15 ist von dem Mischorgan 20 verschlossen. Das Mischorgan 20 weist eine durchbrochene Scheibe 21 auf, die flach an der Kolbenwand 16 anliegt und deren Außendurchmesser etwas geringer ist als derjenige des Kolbens 15. Von der Rückseite der Scheibe 21 steht ein hohler Schaft 22 nach hinten ab. Dieser Schaft 22 füllt den Querschnitt der Hülse 19 vollständig und abdichtend aus. Im Innern des Schafts 22 befindet sich ein Innengewinde, in des der Gewindestutzen 23a am vorderen Ende der Stange 23 eingeschraubt ist. Die Gewinde von Schaft 22 und Gewindestutzen 23a sind zweigängige Gewinde. Dies hat den Vorteil, daß das Auffinden eines Gewindeeingriffs durch Drehen der Stange 23 leichter ist und daß die Gewinde schneller festgezogen werden können. Der Schaft 22 erstreckt sich nicht bis zum rückwärtigen Ende der Hülse 18. In dieses Ende ragt der hinter dem Gewindestutzen 23a befindliche Hauptteil der Stange 23 hinein, dessen Durchmesser gleich demjenigen des Schafts 22 ist.The passage opening 19 of the piston 15 is closed by the mixing element 20. The mixing element 20 has a perforated disk 21 which lies flat against the piston wall 16 and whose outer diameter is somewhat smaller than that of the piston 15. A hollow shaft 22 protrudes from the rear of the disk 21. This shaft 22 completely and sealingly fills the cross section of the sleeve 19. Inside the shaft 22 there is an internal thread into which the threaded connector 23a is screwed at the front end of the rod 23. The threads of shaft 22 and threaded connector 23a are two-start threads. This has the advantage that finding a thread engagement by turning the rod 23 is easier and that the threads can be tightened more quickly. The shaft 22 does not extend to the rear end of the sleeve 18. The main part of the rod 23, whose diameter is equal to that of the shaft 22, projects into this end behind the threaded connector 23a.

Die Scheibe 21 weist mehrere Durchbrechungen 24,25,26 auf. Die Durchbrechungen 24 und 25 enthalten Flügel 27 bzw. 28, die mit der Scheibe 21 durch Filmgelenke 29 bzw. 30 einstückig verbunden sind. Bei den einander gegenüberliegend angeordneten Flügeln 27 befinden sich die Filmgelenke 29 an den im Uhrzeigersinn vorlaufenden radialen Kanten, während die Filmgelenke 30 an den Flügeln 28 jeweils an der im Gegenuhrzeigersinn vorlaufenden radialen Kante angeordnet sind. Wenn das Mischorgan 20 in der Kartusche 10 axial bewegt wird, falten sich alle vier Flügel 27,28 entgegen der Bewegungsrichtung nach außen. Wird das Mischorgan gleichzeitig gedreht, dann weisen nur zwei dieser Flügel in Drehrichtung während die beiden übrigen Flügel in Gegenrichtung weisen. Dadurch wird ein schraubenförmiges Einschneiden der Flügel in die pastöse Masse verhindert und es wird sichergestellt, daß durch die in Gegenrichtung weisenden Flügel eine Agitationswirkung auf die Masse ausgeübt wird.The disk 21 has a plurality of openings 24, 25, 26. The openings 24 and 25 contain wings 27 and 28, which are integrally connected to the disc 21 by film joints 29 and 30, respectively. In the case of the vanes 27 arranged opposite one another, the film joints 29 are located on the radial edges leading in the clockwise direction, while the film joints 30 are arranged on the wings 28 in each case on the radial edge leading in the counterclockwise direction. When the mixing element 20 is moved axially in the cartridge 10, all four wings 27, 28 fold against the Direction of movement outwards. If the mixing element is rotated at the same time, then only two of these blades point in the direction of rotation while the other two blades point in the opposite direction. This prevents a helical cutting of the wings into the pasty mass and ensures that the wings pointing in the opposite direction exert an agitation effect on the mass.

Die Durchbrechungen 26 sind einfache Löcher. Am Umfang der Scheibe 21 befinden sich umfangsmäßig gleichmäßig verteilte Ausnehmungen 31 in Form von Umfangsschlitzen, die radial nach außen offen sind. Jede Ausnehmung 31 kann mit einem Halteorgan 32 des Kolbens 15 zusammenwirken. Das Halteorgan 32 ist ein von der Kolbenfläche 16a nach vorne vorstehender Vorsprung, der in eine Ausnehmung 31 eintaucht, wenn die Scheibe 21 an der Kolbenfläche 16a anliegt. In diesem Fall bildet das Halteorgan 32 eine Drehsicherung, die verhindert, daß die Scheibe 21 relativ zum Kolben 15 gedreht werden kann. Damit ist es möglich, die Stange 23 von dem Mischorgan 20 loszudrehen, während das Mischorgan durch das Halteorgan 32 des Kolbens 15 gegen Drehung festgehalten wird. Der Kolben 15 stützt sich im Innern der Kartusche 10 mit seiner Umfangswand 16 reibend ab, wobei der Drehwiderstand so groß ist, daß der Kolben 15 beim Drehen der Stange 23 innerhalb der Kartusche 10 nicht gedreht wird. Der Vorsprung kann einen sägezahnförmigen Verlauf haben, so daß das Mischorgan 20 nur in der einen Drehrichtung relativ zum Kolben 15 blockiert wird, in der anderen jedoch drehen kann. Wenn die Stange 23 in Löserichtung gedreht wird, sollte das Halteorgan 32 die Drehung des Mischorgans 20 verhindern.The openings 26 are simple holes. On the circumference of the disk 21 there are circumferentially uniformly distributed recesses 31 in the form of circumferential slots which are open radially outwards. Each recess 31 can cooperate with a holding member 32 of the piston 15. The holding member 32 is a projection protruding forward from the piston surface 16a, which protrudes into a recess 31 when the disk 21 is in contact with the piston surface 16a. In this case, the holding member 32 forms a rotation lock, which prevents the disk 21 from being rotated relative to the piston 15. It is thus possible to unscrew the rod 23 from the mixing element 20 while the mixing element is held against rotation by the holding element 32 of the piston 15. The piston 15 is supported in the interior of the cartridge 10 by its peripheral wall 16, the rotational resistance being so great that the piston 15 is not rotated within the cartridge 10 when the rod 23 is rotated. The projection can have a sawtooth-shaped course, so that the mixing element 20 is blocked relative to the piston 15 only in one direction of rotation, but can rotate in the other. When the rod 23 is rotated in the loosening direction, the holding member 32 should prevent the mixing member 20 from rotating.

Die Mischvorrichtung wird in dem in Fig. 1 dargestellten Zustand geliefert, jedoch ohne eingeschraubten Schaft 23, wobei sich die auszupressende Masse oder die eine Komponente dieser Masse im Inneren der Kartusche 10 befinden kann.The mixing device is supplied in the state shown in FIG. 1, but without a screwed-in shaft 23, it being possible for the mass to be pressed out or one component of this mass to be located inside the cartridge 10.

Beim Betrieb der Mischvorrichtung kann zunächst, wenn eine externe Komponente hinzugeführt werden soll, die Wand 14 der Tülle 13 abgeschnitten werden, um die zusätzliche Komponente in die Kartusche 10 einzubringen. Danach wird die Tülle 13 mit einer (nicht dargestellten) Schraubkappe verschlossen. Nun braucht lediglich die Stange 23 in den Schaft 22 des Mischorgans eingeschraubt zu werden. Anschließend kann die Stange 23 mit einer Antriebsmaschine, z.B. einer Handbohrmaschine, verbunden werden, die die Stange und mit dieser das Mischorgan 20 dreht. Bei dieser Drehung ziehen sich die Gewinde von Gewindestutzen 23a und Schaft 22 fest. Nun kann die Stange 23 axial durch die Kartusche 10 bewegt werden, wobei sämtliche Bereiche der Kartusche von der Mischwirkung erfaßt werden. Die Flügel 27,28 des Mischorgans 20 stellen sich selbsttätig so ein, daß sie, bezogen auf die axiale Bewegung, nach hinten weisen.During operation of the mixing device, if an external component is to be added, the wall 14 of the spout 13 can first be cut off in order to introduce the additional component into the cartridge 10. Then the spout 13 is closed with a screw cap (not shown). Now only the rod 23 needs to be screwed into the shaft 22 of the mixing element. The rod 23 can then be driven with a prime mover, e.g. a hand drill, which rotates the rod and with this the mixing element 20. During this rotation, the threads of threaded connector 23a and shaft 22 tighten. The rod 23 can now be moved axially through the cartridge 10, all areas of the cartridge being affected by the mixing action. The wings 27, 28 of the mixing element 20 automatically adjust themselves so that they point to the rear in relation to the axial movement.

Nach Beendigung des Misch- oder Homogenisiervorgangs wird das Mischorgan 20 zurückgezogen, bis es an der Kolbenfläche 16 anliegt. Dann wird die Stange 23 entgegen ihrer vorherigen Drehrichtung gedreht, um den Gewindeeingriff mit dem Mischorgan 20 zu lösen. Dabei stützt sich das Mischorgan 20 an dem Halteorgan 32 ab. Der Schaft 22 dichtet die Durchtrittsöffnung 19 des Kolbens 15 ab. Nach dem Entfernen der Stange 23 kann die Kartusche 10 in ein übliches Auspreßwerkzeug, z.B. eine Spritzpistole, eingesetzt werden, um den Kartuscheninhalt aus der Tülle 13 auszupressen.After the mixing or homogenization process has ended, the mixing member 20 is withdrawn until it abuts the piston surface 16. The rod 23 is then rotated counter to its previous direction of rotation in order to release the threaded engagement with the mixing element 20. The mixing element 20 is supported on the holding element 32. The shaft 22 seals the passage opening 19 of the piston 15. After the rod 23 has been removed, the cartridge 10 can be placed in a conventional extrusion tool, for example a spray gun can be used to squeeze the cartridge contents out of the spout 13.

Das Mischorgan 20 weist einen axialen Ansatz 33 auf, der nach vorne absteht und beim Mischen in das Innere der Tülle 13 eindringen kann, um auch die in der Tülle befindliche Masse zu bewegen. Der Ansatz 33 hat unrunden Querschnitt; er besteht bei dem vorliegenden Ausführungsbeispiel aus drei sternförmigen Rippen. Beim Auspressen der Kartusche verdrängt der Ansatz 33 Material aus der Tülle 13.The mixing element 20 has an axial extension 33 which protrudes towards the front and can penetrate into the interior of the spout 13 during mixing in order to also move the mass located in the spout. The approach 33 has a non-circular cross-section; in the present exemplary embodiment, it consists of three star-shaped ribs. When the cartridge is pressed out, the attachment 33 displaces material from the spout 13.

Claims (9)

  1. Mixing device for mixing or homogenizing pasty or flowable compositions comprising
    - a tubular cartridge (10), having at its one end a front wall (11) with a spout (13),
    - a mixing member (20) accomodated in the cartridge (10) and connected to a rod (23) extending out of the open cartridge end,
    - and a piston (15) for squeezing out the cartridge contents, said piston (15) having an axial passage opening (19) and a holding member (32) for retaining said mixing member,


    characterized in

    that the rod (23) is detachably connected to a shaft (22) of the mixing member (20), that said holding member (32) is a projection protruding forward from the end wall (16a) of said piston (15) and engaging a recess (31) of said mixing member (20) as a contrivance against rotation and which holds said mixing member (20) against rotation as said mixing member is separated from said rod (23), and that said mixing member (20) closes said passage opening (19) with said shaft (22) after said rod (23) has been detached.
  2. Mixing device as set forth in claim 1, characterized in that the piston (15) includes a sleeve (18) projecting to the rear from the piston surface (16a) and forming a seat for said hollow shaft (22), said shaft (22) containing a coupling means for the connection with rod (23).
  3. Mixing device as set forth in claim 2, characterized in that the coupling means is a thread.
  4. Mixing device as set forth in claim 3, characterized in that the thread is at least a double thread.
  5. Mixing device as set forth in one of claims 1-4, characterized in that the projection is saw tooth-shaped to retain the mixing member (20) only in release direction of the rod (23) relative to the piston (15).
  6. Mixing device as set forth in one of claims 1-5, characterized in that the mixing member (20) is a disk (21) provided with openings (24,25,26), among which some openings (24,25) contain blades (27, 28) adapted to swing out of the disk plane.
  7. Mixing device as set forth in claim 6, characterized in that at least two blades (27,28) are hinge-connected to the disk (21) at their mutually confronted or averted radial edges.
  8. Mixing device as set forth in one of claims 1-7, characterized in that the mixing member (20) includes an axial attachment (33) having an out-of-round profile which penetrates a squeezing spout (13) at the end wall (11) of the cartridge (10).
  9. Mixing device as set forth in one of claims 1-8, characterized in that a stop (12a) at the rear end (12) of the cartridge (10) is provided to avoid the escape of piston (15).
EP88111145A 1987-07-15 1988-07-12 Device for mixing or homogeneiring the content of a cartridge Expired - Lifetime EP0299433B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88111145T ATE73095T1 (en) 1987-07-15 1988-07-12 DEVICE FOR MIXING OR HOMOGENIZING THE CONTENTS OF A CARTRIDGE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873723309 DE3723309A1 (en) 1987-07-15 1987-07-15 MIXING DEVICE
DE3723309 1987-07-15

Publications (2)

Publication Number Publication Date
EP0299433A1 EP0299433A1 (en) 1989-01-18
EP0299433B1 true EP0299433B1 (en) 1992-03-04

Family

ID=6331572

Family Applications (1)

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EP88111145A Expired - Lifetime EP0299433B1 (en) 1987-07-15 1988-07-12 Device for mixing or homogeneiring the content of a cartridge

Country Status (8)

Country Link
US (1) US4966468A (en)
EP (1) EP0299433B1 (en)
JP (1) JPH02500824A (en)
KR (1) KR920010797B1 (en)
AT (1) ATE73095T1 (en)
CA (1) CA1283903C (en)
DE (2) DE3723309A1 (en)
WO (1) WO1989000536A1 (en)

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Also Published As

Publication number Publication date
KR890701448A (en) 1989-12-20
KR920010797B1 (en) 1992-12-17
US4966468A (en) 1990-10-30
CA1283903C (en) 1991-05-07
ATE73095T1 (en) 1992-03-15
WO1989000536A1 (en) 1989-01-26
DE3868739D1 (en) 1992-04-09
JPH02500824A (en) 1990-03-22
DE3723309A1 (en) 1989-01-26
EP0299433A1 (en) 1989-01-18

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