EP0657208A1 - Vorrichtung zum Mischen von einem Mehrkomponentenzement und Verfahren zum Durchführen des Mischvorganges - Google Patents

Vorrichtung zum Mischen von einem Mehrkomponentenzement und Verfahren zum Durchführen des Mischvorganges Download PDF

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Publication number
EP0657208A1
EP0657208A1 EP93810856A EP93810856A EP0657208A1 EP 0657208 A1 EP0657208 A1 EP 0657208A1 EP 93810856 A EP93810856 A EP 93810856A EP 93810856 A EP93810856 A EP 93810856A EP 0657208 A1 EP0657208 A1 EP 0657208A1
Authority
EP
European Patent Office
Prior art keywords
mixing
vessel
cement
shaking
coupling
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.)
Withdrawn
Application number
EP93810856A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dick Ter Wee
Gerard Anton Kok
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.)
Allo Pro AG
Original Assignee
Allo Pro AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allo Pro AG filed Critical Allo Pro AG
Priority to EP93810856A priority Critical patent/EP0657208A1/de
Priority to JP6295022A priority patent/JPH07256630A/ja
Publication of EP0657208A1 publication Critical patent/EP0657208A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/20—Mixing the contents of independent containers, e.g. test tubes
    • B01F31/22—Mixing the contents of independent containers, e.g. test tubes with supporting means moving in a horizontal plane, e.g. describing an orbital path for moving the containers about an axis which intersects the receptacle axis at an angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/20—Mixing of ingredients for bone cement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held

Definitions

  • the invention relates to a device for mixing a multi-component cement, with a mixing container and with a motor-driven mixing drive, the multi-component cement being introduced into the mixing container in the form of two or more components, at least one of which is liquid.
  • Multi-component cements are mainly used because of their short curing times, which allows processing with little loss of time.
  • Two-component cements have the advantage that only two parts have to be coordinated to achieve a desired reaction. The mixing process is very important for the quality of such a cement when the two or more components are brought together.
  • a special type of multi-component cement is bone cement, which is used for the fixation of implants and which has to be processed sterile and which also has to be mixed in its preliminary stage under sterile conditions.
  • mixers have been used for this purpose, which, like a kitchen mixer with motor-driven stirrers, stir the components, at least one of which is liquid, in a mixing container.
  • the invention is intended to remedy these disadvantages. Its task is to provide the user of multicomponent cement with another mixing process. This object is achieved with the characteristics of the independent claims 1 and 11, in that the mixing container is a slim vessel which acts to carry out the mixing on its underside via a non-positive and / or positive coupling on a shaking plane transverse to the longitudinal axis of the vessel , designed as a shaking drive mixed drive, while the dependent claims 2 to 10 represent advantageous developments of the invention.
  • the invention has the advantage that, apart from a gas or air cushion, there are no foreign bodies for mixing in the mixing container and that a simply connected surface can form with the air, under which the actual mixing process takes place.
  • This makes it possible to use the mixing container directly for further processing of the freshly prepared cement and to squeeze out the cement if the container is reduced in its filling volume under the action of a mechanical force from outside. Since the relative displacement of the liquid component to the vessel wall is important for the mixture, the mixing container becomes a narrow vessel designed to produce a large wetted surface in relation to the amount filled. The movement of the vessel takes place in that the bottom of the vessel can be placed on a non-positive and / or positive coupling of a shaking drive.
  • the vessel wall is displaced relative to the liquid via the coupling and generates shear stresses and flow.
  • the entire vessel can be anchored to the coupling without any additional support points, or the vessel is held by hand and only deflected by the coupling at one end in accordance with the shaking movement.
  • Another advantage is that for a vessel with one or more end pieces, the mixing process can be carried out with the end to the atmosphere in order to keep undesired vapors away from the operating personnel. If such an end piece is designed as a funnel with a closure cap and the filling volume of the vessel can be reduced, then the freshly mixed cement can be sprayed directly at its destination without the need to transfer or scrape out cement.
  • the cylinder and piston of a cement syringe can be used directly as a mixing vessel. If the cement is bone cement that has to be processed under sterile conditions or if clean room conditions have to be observed, a separating film or a sterile cloth can be inserted between the coupling and the vessel with a suitable coupling.
  • a bone cement that requires a mixing time of about two minutes can therefore be mixed exactly on site in the sterile area for processing and delivered in an ideal consistency, since there is no uncertainty regarding decanting or transfer from the non-sterile area. It is sufficient to provide so much play between the coupling and the vessel that the separating film between them can be inserted and the shaking movement is transmitted from the coupling to the vessel via the pressed release film.
  • a typical coupling option is a coupling with an outer or inner cone, on which a suitably designed vessel base can be centered and can absorb forces transversely to its longitudinal axis.
  • the actual shaking movement of the coupling takes place in a plane transverse to the longitudinal axis of the vessel.
  • a circular movement in the shaking plane has proven to be advantageous if it is carried out with rotational frequencies ⁇ ⁇ 40 s ⁇ 1.
  • a circular movement of the coupling - without making a rotation in the coupling axis - only slightly loads the vessel wall or an intervening separating film.
  • the generation can be carried out with an eccentric on which the coupling is rotatably mounted.
  • Another possibility is to attach the coupling to a circularly oscillating oscillating element of a shaker drive.
  • the mixture in the vessel requires the liquid to be displaced. This is particularly large if the liquid can move freely against the force of gravity under the pressure of a horizontally accelerated vessel wall. For this reason, so much air is left at the top when the components are filled in that the liquid can move upwards on the wall of the vessel even when the vessel is closed, the air flowing into the resulting empty space without great resistance.
  • the figures show a device for mixing multicomponent cement such as, for example, bone cement with at least one liquid component, the components being introduced into an otherwise empty, slim mixing container.
  • This mixing container is placed on its underside on a non-positive and / or positive coupling, which in turn is connected to a shaking drive in order to transmit a shaking movement to the mixing container in a shaking plane transverse to the longitudinal axis of the mixing container.
  • a volume of gas or air is left in the mixing container, which allows the liquid components to be displaced against gravity when accelerating transversely to the force of gravity.
  • a circular shaking movement is particularly advantageous because it creates a constant acceleration and flow for mixing the components. Since the mixing container is free of any additional internals, containers can be used, which are suitable for spraying the ready mixed cement.
  • an operator holds a mixing container 1, which consists of an elongated vessel 11, a screwed-on spray lid 9 and an end cap 8, and presses the vessel 11 on its underside against a coupling 4, which centers the vessel 11 with an inner cone 24.
  • the coupling 4 is rotatably mounted with a bearing 19 on a pin 18, the pin 18 rotating with an eccentricity 22 about an axis of rotation 30 on a circular path 26.
  • This pivoting movement leads to the fact that liquids inside the vessel rise to different heights on the vessel wall and shift their highest liquid level in a rotating manner, in that a gas cushion 20 enclosed by the liquid evades the liquid.
  • the liquid component 3a and a solid component 3b mix evenly when the gas cushion 20 is so large that the liquid 3a can move freely.
  • the circular movement has the advantage that no splashes occur and that the liquid 3a is closed off by a simply connected contact surface to the gas cushion 20.
  • a Volume fraction of 1/4 gas is usually sufficient.
  • the cement is mixed intimately and without the introduction of gas and therefore has particularly good strength properties. This means that this type of mixing is also worthwhile if the cement is not sprayed directly to its final destination, but is refilled beforehand.
  • FIG. 2 the cement 3 mixed together in a mixing container 1 according to FIG. 1 is pressed out after the removal of an end cap under the action of deformation forces 10.
  • the vessel 11 is designed in such a way that it can be folded under lateral deformation forces 10 in order to press out the cement 3.
  • FIG. 3 shows the piston 13 and the cylinder 12 of a cement syringe, which are used as a mixing container 1, the vessel 11 being closed after the components 3a, 3b have been filled in with a spray lid 9 and an end cap 8.
  • an air cushion 20 remains, which takes up about 1/4 of the vessel volume.
  • the cylinder 12 is placed on its lower opening by an operator on a coupling 4 with a conical surface 15 and pressed.
  • the coupling moves on a circular path 26 about a pivot axis 31 and thus produces a circular one Deflection in the shaking plane 5 and causes the components 3a, 3b to mix.
  • This type of coupling has the advantage that it can be used on cylinders with different internal diameters.
  • the separating film 14 is designed as a sterile cloth in order to cover the mixing drive 2 in a sterile manner and to be able to mix the cement in the sterile area.
  • the cylinder 12 is lifted and fixed with its collar 21 to a pistol (not shown), from which a piston rod acts on the piston 13 in order to squeeze out the cement.
  • Suitable as the actual mixing drive 2 is, for example, a model L46 blood shaker from LABINCO B.V., Zinkstraat 64, NL-4823 AC Breda, onto which a coupling 4 with a conical surface 15 is screwed.
  • shakers are supplied with drive current electrically via an electric cable 25.
  • One possibility for driving such shakers is to pivot a vibrating element 29 fastened on a rod designed as a bending spring 27 with a magnetic field 28 changing on a stator body 32 in a more or less circular manner.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Prostheses (AREA)
EP93810856A 1993-12-08 1993-12-08 Vorrichtung zum Mischen von einem Mehrkomponentenzement und Verfahren zum Durchführen des Mischvorganges Withdrawn EP0657208A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP93810856A EP0657208A1 (de) 1993-12-08 1993-12-08 Vorrichtung zum Mischen von einem Mehrkomponentenzement und Verfahren zum Durchführen des Mischvorganges
JP6295022A JPH07256630A (ja) 1993-12-08 1994-11-29 多成分系セメントの撹拌装置及び撹拌方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93810856A EP0657208A1 (de) 1993-12-08 1993-12-08 Vorrichtung zum Mischen von einem Mehrkomponentenzement und Verfahren zum Durchführen des Mischvorganges

Publications (1)

Publication Number Publication Date
EP0657208A1 true EP0657208A1 (de) 1995-06-14

Family

ID=8215081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810856A Withdrawn EP0657208A1 (de) 1993-12-08 1993-12-08 Vorrichtung zum Mischen von einem Mehrkomponentenzement und Verfahren zum Durchführen des Mischvorganges

Country Status (2)

Country Link
EP (1) EP0657208A1 (ja)
JP (1) JPH07256630A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1165221A1 (en) * 1999-03-23 2002-01-02 Flacktek Inc. Mixing system for mixing and dispensing reactive materials
WO2005122971A1 (en) 2004-06-22 2005-12-29 Bone Support Ab Device for producing a hardenable mass
US7935121B2 (en) 2003-11-11 2011-05-03 Bone Support Ab Device for providing spongy bone with bone substitute and/or bone reinforcing material, bone substitute and/or bone reinforcing material and method
US7972630B2 (en) 2000-04-11 2011-07-05 Bone Support Ab Injectable bone mineral substitute material
US8420127B2 (en) 2003-03-05 2013-04-16 Bone Support Ab Bone substitute composition
US9180137B2 (en) 2010-02-09 2015-11-10 Bone Support Ab Preparation of bone cement compositions
US10294107B2 (en) 2013-02-20 2019-05-21 Bone Support Ab Setting of hardenable bone substitute

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638918A (en) * 1970-03-09 1972-02-01 Dental Design Systems Mixing of substances
DE3213707C1 (de) * 1982-04-14 1984-02-16 Janke & Kunkel GmbH & Co KG Ika - Werk, 7813 Staufen Schüttelvorrichtung
US4555183A (en) * 1984-02-06 1985-11-26 Reese Scientific Corporation High speed test tube agitator apparatus
DE3708442A1 (de) * 1987-03-16 1988-09-29 Patrik Dr Med Gruendler Verfahren und vorrichtungen zum zubereiten und ausbringen eines gemisches aus zwei komponenten
EP0356883A1 (en) * 1988-08-24 1990-03-07 E.I. Du Pont De Nemours And Company Vortex mixer drive

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3638918A (en) * 1970-03-09 1972-02-01 Dental Design Systems Mixing of substances
DE3213707C1 (de) * 1982-04-14 1984-02-16 Janke & Kunkel GmbH & Co KG Ika - Werk, 7813 Staufen Schüttelvorrichtung
US4555183A (en) * 1984-02-06 1985-11-26 Reese Scientific Corporation High speed test tube agitator apparatus
DE3708442A1 (de) * 1987-03-16 1988-09-29 Patrik Dr Med Gruendler Verfahren und vorrichtungen zum zubereiten und ausbringen eines gemisches aus zwei komponenten
EP0356883A1 (en) * 1988-08-24 1990-03-07 E.I. Du Pont De Nemours And Company Vortex mixer drive

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1165221A1 (en) * 1999-03-23 2002-01-02 Flacktek Inc. Mixing system for mixing and dispensing reactive materials
EP1165221A4 (en) * 1999-03-23 2005-04-20 Flacktek Inc MIXER SYSTEM FOR MIXING AND DISPENSING REACTIVE MATERIALS
US7972630B2 (en) 2000-04-11 2011-07-05 Bone Support Ab Injectable bone mineral substitute material
US8420127B2 (en) 2003-03-05 2013-04-16 Bone Support Ab Bone substitute composition
US7935121B2 (en) 2003-11-11 2011-05-03 Bone Support Ab Device for providing spongy bone with bone substitute and/or bone reinforcing material, bone substitute and/or bone reinforcing material and method
EP2108324A1 (en) 2004-06-22 2009-10-14 Bone Support AB Device for producing a hardenable mass
EP1920738A2 (en) 2004-06-22 2008-05-14 Bone Support AB Device for distributing a hardenable mass
EP1913888A2 (en) 2004-06-22 2008-04-23 Bone Support AB Device for producing a hardenable mass.
US8297831B2 (en) 2004-06-22 2012-10-30 Bone Support Ab Device for producing a hardenable mass
WO2005122971A1 (en) 2004-06-22 2005-12-29 Bone Support Ab Device for producing a hardenable mass
US8662737B2 (en) 2004-06-22 2014-03-04 Bone Support Ab Device for producing a hardenable mass
US9180137B2 (en) 2010-02-09 2015-11-10 Bone Support Ab Preparation of bone cement compositions
US10294107B2 (en) 2013-02-20 2019-05-21 Bone Support Ab Setting of hardenable bone substitute
US10994998B2 (en) 2013-02-20 2021-05-04 Bone Support Ab Setting of hardenable bone substitute

Also Published As

Publication number Publication date
JPH07256630A (ja) 1995-10-09

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