EP2651546B1 - Apparatus for preparing a ready-to-use filler by mixing a binder component and a curing component, and its use - Google Patents

Description

The present invention relates to a device for producing a ready-to-use filler compound by mixing a binder and a hardener component according to the preamble of claim 1.

Such devices for mixing at least two components are used, for example, in the production of fillers, wherein a hardener component with a 1 ... 2% content of a binder component is mixed to produce a curable filler. The mixing device has for the supply of the respective components inlet openings, via which the components are added into the mixing chamber. The components are stored in upstream receptacles such as cartridges or the like, the mixing device being part of a means for providing putties.

Such devices for mixing at least two components are used, for example, in the production of fillers, wherein a hardener component with a 1 ... 2% content of a binder component is mixed to produce a curable filler. The mixing device has for the supply of the respective components inlet openings, via which the components are added into the mixing chamber. The components are stored in upstream receptacles such as cartridges or the like, the mixing device being part of a means for providing putties.

STATE OF THE ART

Such a device for producing a ready-to-use filling compound for the filling of surfaces, which relate, for example, to vehicle bodies, is known from US Pat DE 203 07 518 U1 known. The apparatus has two reservoirs arranged at a base station, of which one is filled with a binder component, namely a putty component, and the other with a hardener component. With the help of a metering device, the two components each have a Feed channel continuously fed to a mixing chamber in which the components come into contact with each other. The mixing chamber is formed from a tube section of a flexible tube, on the outside of which press rollers engage, which compress the tube section and simultaneously drive around a longitudinal axis. Due to the friction occurring and the adhesion of the components to the inner wall of the tube, the components are mixed together. After the mixture has passed through the tube section, it arrives at an outlet opening provided on the tube, where it emerges continuously from the tube. The tube wall is made of an airtight plastic, so that the air surrounding the tube during the mixing process does not get into the mix and can be trapped in this in the form of pores or voids.

The EP 1 900 443 A2 describes a device system for producing a ready-to-use putty by mixing a binder and a hardener component. This device system for mixing at least two components, in particular a binder component A and a hardener component B, to a pasty or liquid mixture for producing a ready-to-use filler for filling surfaces, for example vehicle bodies, comprises a support plate with an inlet opening for the supply of the binder component A from a storage container arranged on the support plate and with at least one further inlet opening for the supply of the hardener component B from a reservoir arranged on the support plate and outlet openings connected to the inlet openings via supply channels in the support plate, and a Functionally connectable to the support plate mixing device with a number of outlet openings in the support plate corresponding number of corresponding with the outlet openings of the mixing device, the a ho hlzylinderartigen stator having a discharge opening formed in its wall for the mix and a concentrically arranged in this rotatable about a longitudinal axis rotor part with an annular gap formed between the stator and the rotor part mixing chamber, wherein a plurality of integrally formed on the stator first mixing teeth radially extend inwardly and a plurality of second mixing teeth formed on the rotor part radially outwardly into the mixing chamber in order to move by means of a rotational movement of the rotor part in the stator, the mixing teeth against each other to create a mixing of components A and B, wherein the stator at least one, preferably has two inlet openings for the hardener component B connected to the mixing chamber and wherein the first mixing teeth are arranged on at least one first mixing tooth plane and the second mixing teeth on at least one second mixing tooth plane, wherein the mixing tooth planes are staggered axially in the direction of the longitudinal axis, so that the second mixing teeth of the rotor part in the respective intermediate spaces of the first mixing teeth of the stator rotate radially, with several mixing tooth planes are provided on the rotor part and / or on the stator, preferably the number of mixing tooth planes on the rotor part and the stator gl eich, wherein for the functional connection between the mixing device and the support plate, the stator at its end facing away from the inlet openings carries an annular support which has Befestigungsdurchbrechungen and the bayonet-like detachable, lockable and rotatably connected to the stator, wherein the rotation by means of stops such is limited, that a fit of the inlet opening for the binder component A in the mixing device with the corresponding outlet opening in the support plate and at the same time a fit of the inlet openings for the hardener component B in the mixing device is achieved with the corresponding outlet openings in the support plate.

DISCLOSURE OF THE INVENTION: TASK, SOLUTION, ADVANTAGES

This mixing device has a hollow cylinder-like stator part and a rotor part rotatably received in this concentric about a longitudinal axis and the mixing chamber between the stator and the rotor part ringpaltartig formed, wherein a plurality of molded on the stator first mixing teeth radially inwardly and a plurality of second rotor teeth integrally formed on the second mixing teeth radially extend outwardly into the mixing chamber in order to move by means of a rotary movement of the rotor part in the stator, the mixing teeth against each other and to provide a mixing of the two components, wherein the stator at least one, preferably two with the Mixing chamber has connected inlet openings for the hardener component

Before the start of each mixing process namely before the feed of the binder component or before the start of the continuous mixing process with the rotational movement of the counter-rotating mixing teeth of the mixer, an amount of 0.1 grams to 0.5 grams, preferably 0.2 grams pasty or liquid hardener component injected into the mixing chamber, whereupon the feed of the binder component and the inflow of the hardener component takes place.

And this injection of a minimum amount of hardener component is triggered and monitored by the controller. By injecting or injecting a small amount of pasty or liquid hardener component before or at the beginning of each continuous mixing process in the mixing chamber of the device faulty mixing results are to be avoided, because without this pre-injection always leads to faulty mixing results. This is because the mixing ratio is up to 2% to 98% of binder component and hardener component. The initial amount, which is about 1 cm ³ , then contains either no hardener or so much reduced amount of hardener that it can partially come to deficient curing. A useful cure result is therefore achieved with a benzoyl peroxide content (50% paste) between 0.8% to 5%. If this proportion is not met in over- or under-dosage, then quality problems arise in the mix. The underdosing leads to insufficient final hardness. The overdose leads to an undesirable enrichment of the binder component (putty) with plasticizer, which is about 50% contained in the hardener paste. If these guideline values are not adhered to when curing the final product, then there will be incorrect final results during painting.

However, this advance of the injection of a small amount of hardener component before the beginning of the actual feed of binder component and hardener component for the mixing process is not sufficient to homogenous mixing of at least two components to produce a ready-to-use fully curable filler without air pockets to reach. What is due to the fact that the hardener component has to travel a relatively long way until it enters the mixing device, because the distance between the outlet opening and the device plate or support plate of the device and the inlet opening of the mixing chamber of the mixing device is relatively large, so that in the mass of the hardener component trapped and entrained air bubbles are transported into the mixing chamber and are not completely eliminated when mixing the hardener component with the binder component by the rotational movement of the mutually running mixing teeth of the mixing device.

On this basis, the invention has for its object to provide a device for a homogeneous mixing of at least two components (a binder and a hardener component), for producing a ready-to-use fully curable filler, wherein the hardener component from the outlet of the outlet opening one, the container for the two components carrying device plate to the mixing chamber of a mixing device of the device has a very small path, preferably a path of 1 mm, with a diameter of the flow channel of 1.5 to 1.6 mm to cover by the Shortening the way to save Wegzeit until the binder component meets the hardener component, so that even the first part of the exiting from the outlet binder component already contains the necessary amount of hardener of about 2% and thus a uniform time to gelling of 2 until 3 minutes is reached.

This solution is specified in claim 1.

1. a) dass die Binder-Komponente A und die Härter-Komponente B vermittels Steuereinrichtungen zur Mischkammer der Mischvorrichtung derart zuführbar sind, dass eine geringe Menge an Härter-Komponente B durch Expansion der Mikro-Luftbläschen als Vor-Einspritzung gegenüber der Zuführung der Binder-Komponente A zur Mischkammer zuführbar ist, wobei das Gerät für eine wirksame Expansion der Mikro-Luftbläschen einen zur Hälfte oder zu dreiviertel
   mit Härter-Komponente B befüllten kartuschenartigen Behälter aufweist, wobei die Austrittsöffnung in der Geräteplatte für den Austritt der Härter-Komponente B in einem Abstand von der Eintrittsöffnung der Mischkammer von bevorzugter Weise 1 mm für eine Weglänge von 1 mm für den Fluss der Härter-Komponente B in die Mischkammer angeordnet ist, wobei der Zuführungskanal für die Härter-Komponente in der Geräteplatte in einem Endabschnitt, welcher benachbart zur Austrittsöffnung in der Geräteplatte liegt, einen Durchmesser von bevorzugter Weise 1,5 mm bzw. 1,6 mm aufweist, wobei der Zuführungskanal ausgenommen des Endabschnittes einen gegenüber dem Endabschnitt größeren Durchmesser, bevorzugt 6,0 mm, aufweist, und wobei vor Beginn des kontinuierlichen Mischprozesses vermittels der Expansion der Mikro-Luftbläschen eine Menge von 0,1 Gramm bis 5 Gramm, bevorzugterweise 0,2 Gramm Härter-Komponente B einspritzbar bzw. injizierbar ist,
   und/oder
2. b) dass der Zuführungskanal für die, gegenüber der Viskosität der Binder-Komponente A eine geringere Viskosität aufweisende Härter-Komponente B einen Durchmesser von 1,5 mm bis 1,6 mm aufweist, dass der Zuführungskanal ausgenommen des Endabschnittes einen gegenüber dem Endabschnitt größeren Durchmesser, bevorzugt 6,0 mm, aufweist, wobei die Mischvorrichtung an der Geräteplatte im Bereich deren Austrittsöffnungen für die beiden Komponenten A und B angeordnet ist, dass die Austrittsöffnung für die Härter-Komponente B in der Geräteplatte an der Eintrittsöffnung bzw. Eintrittsbohrung für die Härter-Komponente B der Mischkammer anliegt und mit dieser deckungsgleich ist, wobei der Abstand der Austrittsöffnung zur Eintrittsöffnung der Mischkammer der Wandstärke der Mischkammerwand von bevorzugterweise 1 mm beträgt, und dass die Weglänge für den Fluss der Härter-Komponente B von der Austrittsöffnung in der Geräteplatte in die Mischkammer der Wandstärke der Kammerwand entspricht.

Thereafter, the invention consists in a device according to the preamble of claim 1, which is designed so

1. a) that the binder component A and the hardener component B can be supplied to the mixing chamber by means of control means such that a small amount of hardener component B by expansion of the micro-air bubbles as pre-injection compared to the supply of the binder component A can be fed to the mixing chamber, the device for an effective expansion of the micro-air bubbles one-half or three-quarters
   comprising cartridge-type container filled with hardener component B, wherein the outlet opening in the device plate for the exit of the hardener component B at a distance from the inlet opening of the mixing chamber is preferably 1 mm for a path length of 1 mm for the flow of the hardener component B is arranged in the mixing chamber, wherein the supply channel for the hardener component in the device plate in an end portion which is adjacent to the outlet opening in the device plate, preferably has a diameter of 1.5 mm and 1.6 mm, wherein the Feed channel except the end portion with respect to the end portion of larger diameter, preferably 6.0 mm, and wherein prior to the start of the continuous mixing process by means of the expansion of the micro-air bubbles, an amount of 0.1 grams to 5 grams, preferably 0.2 grams of hardener Component B can be injected or injected,
   and or
2. b) that the supply channel for the, compared to the viscosity of the binder component A lower viscosity hardening component B has a diameter of 1.5 mm to 1.6 mm, that the supply channel except the end portion has a relation to the end portion of larger diameter , preferably 6.0 mm, wherein the mixing device is arranged on the device plate in the region of the outlet openings for the two components A and B, that the outlet opening for the hardener component B in the device plate at the inlet opening or inlet hole for the hardener Component B of the mixing chamber and is congruent with this, wherein the distance of the outlet opening to the inlet opening of the mixing chamber, the wall thickness of the mixing chamber wall of preferably 1 mm, and that the path length for the flow of the curing agent component B from the outlet opening in the device plate in the mixing chamber the wall thickness of the Kammerw and corresponds.

Thereafter, a first technical solution is that due to the structural design of the device, the expansion of the micro-air particles or micro-air bubbles in the mass of the hardener component B is exploited, the expansion only works effectively when the cartridge-like container for the hardener component B is about half or quarter filled, because the lower filled the cartridge-like container is, the lower the pressure of the micro-air inclusions in the mass of the hardener component B. At very low filling, the pressure is not sufficient to achieve a useful pre-injection. For this reason, it is necessary that the filling of the cartridge-type container be such that sufficient pressure is available that allows the mass to be compressed can be with the result that upon release of the pressure on the micro-air inclusions this and thus the mass can not expand, so that the required amount of hardener component B can flow into the mixing chamber of the mixing device for a pre-injection.

Therefore, the invention provides that the outlet of the hardener component B is laid so far that the hardener component only has to travel a little way, so almost only by the material thickness of the mixing chamber of the mixing device of 1 mm, to effectively as a pre-injection In particular, the binder component A is significantly more viscous in viscosity than the viscosity of the hardener component B. It is therefore necessary for the mixing device to remain on the device until a new mixture is made.

Surprisingly, it has been found that by tracking the exit opening for the hardener component B on the cartridge-like container or on the device plate up to the inlet opening for the hardener component B of the mixing device into the mixing chamber of the mixing device irregularities in the mixing of the two Components A and B and in the preparation of the filler after completion of the mixing process and in the then later cured filler will mix after their processing.

The micro-air bubbles present in the hardener component B, which is preferably a benzoyl peroxide paste or a cyclohexanone peroxide paste, ie the air bubbles, are used here to achieve a very small amount of hardener component B for the pre-injection in the mixing of the binder component A, which is a polyester composition, used with the benzoyl peroxide paste of the curing agent component B. In the preparation of the benzoyl peroxide paste from Bezolychlorid in a water bath for cooling is cooled with ice. If the water temperature rises during the reaction, the more ice melts. The benzoyl peroxide has crystalline structure. Later, a reaction with a plasticizer takes place. In this case, small amounts of air are included. A paste of benzoyl peroxide and plasticizer contains a very small amount of micro-air bubbles, which cause a low compressibility of the material. This effect is however as a function of the filling level of hardener component in the cartridge-like container to different degrees, with the result that in a complete filling of the cartridge-like container with the hardener component B high compressibility is achieved by the plurality of micro-bubbles in the hardener mass and This compressibility allows a flow of hardener component B to the mixing device, especially since it is sufficient for a completely filled cartridge-type container with hardener component that a Nachdrück-effect arises sufficient to already a small amount of about 0.1% of hardener -B component B in the mixing chamber of the mixing device to press, so that at the beginning of the tapping already passes a lot of hardener component B for pre-injection into the mixing chamber. The amount of hardener component B injected by the expansion of the micro-air bubbles into the mixing chamber of the mixing device is 0.1 grams to 5.0 grams, more preferably 0.2 grams.

This flow of injection of a small amount of hardener component before the beginning of the actual feed of binder component and hardener component for the mixing process is no lead to achieve a proportional application of the binder component and the hardener component, because the hardener Component must not be more than 4%, because otherwise unacceptable reactions occur and u. a. Also, a peroxide bleaching action of the colorant pigments contained in the hardener component may occur.

A second technical solution that can also be combined with the first technical solution is that the flow channel for the hardener component B in the device plate has a diameter of 1.5 to 1.6 mm, so that the way the hardener mass is just as large as the wall thickness of the mixing device, namely 1 mm. Due to the low viscosity of the hardener component B, mixing with the supplied binder component B in the mixing zone thus occurs immediately, resulting in a slight pre-injection, or pre-injection is unnecessary. The pre-injection may thus be wholly or only partially necessary. By shortening the path from the outlet opening in the device block to the mixing chamber of the mixing device Wegzeit is saved until the binder component A meets the hardener component B, then mixed with each other with the aid of the rotational movement of the rotor of the mixing device and the mixing teeth. The combination of the hardener component with the low viscosity and the resulting thin liquid plus rotational movement of the rotor of the mixing device leads to the result of a mixing of the two components A and B from the beginning, as already at the meeting of the two components A and B, so that the first part of the binder component A, which emerges from the outlet opening of the device plate, already contains the necessary amount of hardener component B of about 2%, whereby a uniform time until gelation, namely 2 to 3 minutes is reached.

Particularly advantageous is the arrangement of a check valve in the supply channel in the device plate for the supply of the hardener component B to the mixing device, because thereby a reflux of the hardener component B after cancellation of the pressing pressure on the hardener mass in the supply channel for the hardener component B in the Device plate is prevented. It is prevented by this technical embodiment, any reflux, so that no malfunction can occur.

Furthermore, the invention comprises the use of a device for mixing at least two components, in particular of a binder component A with a hardener component B in a pasty mix for producing a ready-to-use filler for filling surfaces of vehicle bodies with the features of the claims to shorten the path of the hardener component B to the binder component A to obtain a uniform time to gelling of the two components of 2 to 3 minutes.

BRIEF DESCRIPTION OF THE DRAWINGS

Further measures which improve the invention are specified in the subclaims or are described in more detail below with the description of the invention with reference to the figures.

• Fig. 1 eine schematische schaubildliche Darstellung eines Mischgerätes zur Herstellung einer gebrauchsfertigen Spachtelmasse mit zwei senkrecht stehenden Behältern für die Binder-Komponente und die Härter-Komponente, mit einer Geräteplatte und mit einer Mischvorrichtung für die beiden Komponenten,
• Fig. 2 eine schematische schaubildliche Darstellung eines Mischgerätes zur Herstellung einer gebrauchsfertigen Spachtelmasse mit zwei waagerecht liegenden Behältern für die Binder-Komponente und die Härter-Komponente, mit einer Geräteplatte und mit einer Mischvorrichtung für die beiden Komponenten,
• Fig. 3 eine schematische schaubildliche Darstellung des Mischgerätes zur Herstellung einer gebrauchsfertigen Spachtelmasse mit zwei Behältern für die Binder-Komponente und die Härter-Komponente, mit der Geräteplatte und mit einer Mischvorrichtung für die beiden Komponenten, wobei der Fließweg der beiden Komponenten aus den beiden Behältern zu der Mischvorrichtung durch Pfeile angedeutet ist,
• Fig. 4 eine schaubildliche Ansicht eines Teils des Gerätes zur Herstellung einer gebrauchsfertigen Spachtelmasse mit in die Geräteplatte eingesetzten Behältern für die Binder-Komponente und die Härter-Komponente und mit eingesetzter Mischvorrichtung,
• Fig. 5 eine schaubildliche Ansicht einer nicht von der Erfindung umfassten platten- bzw. blockförmig ausgebildeten Geräteplatte mit den Eintrittsöffnungen und den Austrittsöffnungen für die Binder-Komponente und die Härter-Komponente und mit den die Eintrittsöffnungen und die Austrittsöffnungen verbindenden Zuführungskanälen,
• Fig. 6 einen Abschnitt der Geräteplatte mit einem Zuführungskanal für die Härter-Komponente mit einem einen kleineren Durchmesser aufweisenden Zuführungskanalabschnitt und mit angesetzter Mischvorrichtung in einem senkrechten Schnitt,
• Fig. 7 eine weitere Darstellung eines Abschnittes der Geräteplatte mit dem Zuführungskanal für die Härter-Komponente und mit angesetzter Mischvorrichtung in einem senkrechten Schnitt,
• Fig. 8 eine weitere Darstellung eines Abschnittes der Geräteplatte mit dem Zuführungskanal für die Härter-Komponente und mit angesetzter Mischvorrichtung mit ausgetretenem Mischgut teils in Ansicht, teils in einem senkrechten Schnitt,
• Fig. 9 eine vergrößerte Darstellung eines Abschnittes der Geräteplatte mit einem einen kleinen Durchmesser aufweisenden Abschnitt des Zuführungskanals für die Härter-Komponente und mit angesetzter Mischvorrichtung, teils in Ansicht, teils in einem senkrechten Schnitt,
• Fig. 10 einen Abschnitt der Geräteplatte mit dem Zuführungskanal für die Härter-Komponente und mit angesetzter Mischvorrichtung, wobei in dem Zuführungskanal ein Rückschlagventil eingesetzt ist, teils in Ansicht, teils in einem senkrechten Schnitt,
• Fig. 11 eine vergrößerte Darstellung eines Abschnittes der Geräteplatte mit in dem Zuführungskanal für die Härter-Komponente eingesetztem Rückschlagventil, teils in Ansicht, teils in einem senkrechten Schnitt,
• Fig. 12 eine weitere vergrößerte Darstellung eines Abschnittes der Geräteplatte mit in dem Zuführungskanal für die Härter-Komponenten eingesetztem Rückschlagventil, teils in Ansicht, teils in einem senkrechten Schnitt,
• Fig. 13 eine weitere vergrößerte Darstellung eines Abschnittes der Geräteplatte mit in dem Zuführungskanal für die Härter-Komponenten eingesetztem Rückschlagventil, teils in Ansicht, teils in einem senkrechten Schnitt,
• Fig. 14 eine schaubildliche Ansicht der aus einem Statorteil und einem Rotorteil bestehenden Mischvorrichtung mit Eintrittsöffnungen für die Zuführung der Binder-Komponente und der Härter-Komponente
• Fig. 15 eine schaubildliche Explosionsdarstellung der Mischvorrichtung mit dem Statorteil und dem Rotorteil, und
• Fig. 16 eine schaubildliche Ansicht des Stators der Mischvorrichtung mit Eintrittsöffnungen für die Binder-Komponente und der Härter-Komponente.

Show it:

• Fig. 1 a schematic perspective view of a mixing device for producing a ready-made filler with two vertical containers for the binder component and the hardener component, with a device plate and with a mixing device for the two components,
• Fig. 2 a schematic perspective view of a mixing device for producing a ready-made filler with two horizontal containers for the binder component and the hardener component, with a device plate and with a mixing device for the two components,
• Fig. 3 a schematic perspective view of the mixer for producing a ready-made filler with two containers for the binder component and the hardener component, with the device plate and with a mixing device for the two components, wherein the flow path of the two components from the two containers to the mixing device indicated by arrows,
• Fig. 4 a perspective view of a part of the device for producing a ready-made filler with inserted into the device plate containers for the binder component and the hardener component and with inserted mixing device,
• Fig. 5 a perspective view of a not included in the invention plate or block-shaped device plate with the inlet openings and the outlet openings for the binder component and the hardener component and with the inlet openings and the outlet openings connecting supply channels,
• Fig. 6 a section of the device plate having a supply channel for the hardener component with a smaller diameter supply channel section and with attached mixing device in a vertical section,
• Fig. 7 a further representation of a portion of the device plate with the supply channel for the hardener component and with attached mixing device in a vertical section,
• Fig. 8 a further representation of a portion of the device plate with the supply channel for the hardener component and with attached mixing device with leaked mix partly in view, partly in a vertical section,
• Fig. 9 an enlarged view of a portion of the device plate with a small diameter portion of the supply channel for the hardener component and with attached mixing device, partly in view, partly in a vertical section,
• Fig. 10 a portion of the device plate with the supply channel for the hardener component and attached mixing device, wherein in the supply channel a check valve is inserted, partly in view, partly in a vertical section,
• Fig. 11 an enlarged view of a portion of the device plate with inserted in the supply channel for the hardener component check valve, partly in view, partly in a vertical section,
• Fig. 12 a further enlarged view of a portion of the device plate with inserted in the supply channel for the hardener components check valve, partly in view, partly in a vertical section,
• Fig. 13 a further enlarged view of a portion of the device plate with inserted in the supply channel for the hardener components check valve, partly in view, partly in a vertical section,
• Fig. 14 a perspective view of the consisting of a stator and a rotor part mixing device with inlet openings for the supply of the binder component and the hardener component
• Fig. 15 a perspective exploded view of the mixing device with the stator and the rotor part, and
• Fig. 16 a perspective view of the stator of the mixing device with inlet openings for the binder component and the hardener component.

PREFERRED EMBODIMENT OF THE INVENTION

The figures are exemplary technical embodiments of the present invention.

This in Fig. 1 illustrated apparatus 10 for producing a ready-made filler for the filling of surfaces, such as those of vehicle bodies, by mixing a binder component A with at least one hardener component B includes a in a device component 20 (Fig. Fig. 4 ) arranged plate-shaped or block-like device plate 30 of a metallic material or plastic having an inlet opening 31 for the binder component A and an inlet opening 32 for the curing agent component B. Furthermore, the device plate 30 has an outlet opening 33 for the binder component A and an outlet opening 34 for the hardener component B on. The inlet openings 31, 32 are connected via supply channels 35, 36 with the outlet openings 33, 34 ( Fig. 1, 2 . 3 and 5 , wherein the embodiment of the Fig. 5 not included in the invention).

The device component 20 is in a stand 21 (FIG. Fig. 4 ) or on a support plate and receives the device plate 30, which serves as a base plate for a can-shaped container 40 for the binder component A and for a cartridge-like container 50 for the hardener component B. The two containers 40, 50 have in their bottom plates 41, 51 outlet openings 42, 52, which are arranged centrally or eccentrically in the bottom plates 41, 51 and which have a circular or other geometric shape ( Fig. 3 ).

Furthermore, the containers 40, 50 in their interiors pressurizable sliding floors 43, 53 which rest on the contents of the two containers 40, 50 and which are displaceable by means of hydraulic or electric motor operated piston rods, are displaceable in the direction of arrow x, y, if components Mass from the containers 40, 50 are to be pressed out ( Fig. 3 ).

The containers 40, 50 are arranged with their outlet openings 42, 52 on or on the device plate 30 such that the outlet openings 42, 52 with the inlet openings 31, 32 of the device plate 30 correspond, both containers 40, 50 are so firmly connected to the device plate 30 that the support-shaped outlet openings 42, 52 airtight into the inlet openings 31, 32 of the device plate 30 engage.

At the in Fig. 1 In the embodiment shown, the device 10 has a horizontally arranged device plate 30 on which the containers 40, 50 are arranged vertically.

In the Fig. 2 embodiment shown shows a device 10, in which the device plate 30 is arranged vertically, wherein the containers 40, 50 are horizontally connected to the device plate 30.

The mixing of the binder component A with the hardener component B takes place by means of a mixing device 60 (FIG. Fig. 1, 2 . 3 and 4 ).

The Fig. 3 and 5 show the flow of the binder component A and the hardener component B from the containers 40, 50 through the device plate 30 to the mixing device 60. If binder component A and hardener component B are pushed out of their containers 40, 50, then binder mass and Hardener mass in the direction of arrow x1, y1 pressed into the inlet openings 31, 32 of the device plate 30 and enter in the direction of arrow x1, y1 via the supply channels 35, 36 (arrow x2, y2) to the outlet openings 33, 34 in the device plate 30 and from there into inlet openings 64, 65 (arrow direction x3, y3) of the mixing device 60, in which the two components A, B are mixed with each other to the ready-to-use filler SM. The putty then exits the outlet opening 66 of the mixing device in the direction of arrow x4 ( Fig. 3 . 4 and 5 ).

The mixing device 60 according to Fig. 14 . 15 and 16 includes a stator 61 and a rotor portion 62 which is inserted into the stator 61 and rotatably mounted therein. At C, the drive for the rotor part 62 attacks ( Fig. 14 ). The motor drive for the rotor part 62 is arranged in the device component 20 of the device 10, which also receives the drives for the piston rods for moving the sliding floors 43, 53 of the containers 40, 50. For supplying the binder component A and the hardener component B, the stator part 61 has inlet openings 64, 65, which correspond to the outlet openings 42, 52 of the device plate 30 when the mixing device 60 is attached to the device plate 30 or attached thereto ,

To illustrate the supply of the two components A and B respective arrows are marked with x4 and y4 ( Fig. 14 ). Should a supply of hardener components from two cartridge-type containers 50 be required, then the mixing device 60 has a further inlet opening. The device plate 30 is formed in this case according to the hardener component B can be transferred from the second cartridge-like container 50 in the mixing device 60.

The mixing device 60 has a hollow-cylinder-like stator part 61 with an outlet opening 66 formed in its wall for discharging the mixed material ( Fig. 4 and 16 ). The rotor part 62 is arranged concentrically in the stator part 61 and rotatable about a longitudinal axis LA (FIG. Fig. 15 ). Between the stator part 61 and the rotor part 62 of the mixing device 60, an annular gap-like mixing chamber 63 is formed ( Fig. 16 ). The stator part 61 has a plurality of first mixing teeth 67 integrally formed on the inner wall surface of the stator part 61 and extending radially inward into the mixing chamber 63. On the outer wall surface of the rotor part 62 also a plurality of second mixing teeth 68 are integrally formed, which extend outwardly into the mixing chamber 63 inside. The arrangement of the mixing teeth 67, 68 is such that upon a rotational movement of the rotor part 62 in the stator 61, the mixing teeth 67, 68 move against each other to create a mixing of the two components A and B ( Fig. 14 . 15 and 16 ).

The first mixing teeth 67 are arranged on at least one first mixing tooth plane 70 and the second mixing teeth 68 on at least one second mixing tooth plane 71, whereby the mixing tooth planes 70, 71 are staggered axially in the direction of the longitudinal axis LA, so that the second mixing teeth 68 of the rotor part 62 in the respective spaces of the first mixing teeth 67 of the stator 61 rotate radially, with a plurality of mixing teeth levels 70, 71 are provided on the rotor part 62 and / or on the stator 61. Preferably, the number of mixing tooth planes 70, 71 on the rotor part 62 and on the stator part 61 is equal to ( Fig. 16 ).

In order to be able to control the supply of the hardener component by means of a visual inspection, it is provided that at least the stator part 61 is formed from a transparent material, wherein the transparent material from the group of plastics comprising a polycarbonate (PC), a polymethyl methacrylate (PMMA ) and / or a styrene-acrylonitrile (SAN) or PP in Random quality, preferably transparent, is formed. It is also of particular advantage to color the hardener component. Through the transparent stator part, the supply of the hardener component is visible, so that the Operator during the operation of the mixing device can control the supply of the curing agent component of the eye.

The rotor part 62 is advantageously made of polyoxymethylene (POM), also called polyacetal or polyformalehyde formed. This material has better sliding properties with a polycarbonate or polypropylene (PP).

According to a further embodiment of the invention, the device 10 is designed so that the supply of the binder component A and the hardener component B by means of control means to the mixing chamber 63 of the mixing device 60 takes place such that a small amount of hardener component B by expansion of the Micro-air bubbles in the hardener mass is supplied as a pre-injection compared to the supply of the binder component A to the mixing chamber 63. For effective expansion of the micro-air bubbles, the device 10 has a cartridge-type container 50 filled half or three quarters with hardener component B, which can also be completely filled with hardener component. The outlet opening 34 in the device plate 30 for the exit of the hardener component B is arranged according to the invention at a distance from the inlet opening 65 of the mixing chamber 63 of the attached to the device plate 130 mixing device 60 of preferably 1 mm, so that the hardener component B a Path length of 1 mm to get into the mixing chamber 63. Furthermore, the supply channel 36 for the hardener component B in the device plate in a lying adjacent to the outlet opening 34 in the device plate 30 section 36a has a diameter of preferably 1.5 mm and 1.6 mm. The actual feed channel 36 for the hardener component B has a larger diameter than the feed channel section 36a. Preferably, according to Fig. 9 the diameter for the feed channel 36 is preferably 6.0 mm and the diameter for the feed channel section 36a is 1.5 mm. With this embodiment, it is achieved that an amount of 0.1 grams to 5.0 grams, preferably 0.2 grams of hardener component B is injected into the mixing chamber 63 before the beginning of the continuous mixing process by the expansion of the micro-air bubbles ( Fig. 6 . 7 and 8 ).

The holder of the mixing device 60 on the device plate 30 is carried out with the in Fig. 6 shown inventive structural design, after the mixing device 60 is inserted or clipped in the region of the outlet opening 34 for the hardener component B in the device plate 30 in an annular groove formed in this. The fixture for the mixing device 60 on the device plate 30 is designed so that the mixing device can be replaced after preparing a batch of putty against a new, unused mixing device. At the in Fig. 7 In the embodiment shown, the feed channel 36 has a diameter of 6 mm and the end section has a diameter of 1.5 mm.

According to a further embodiment of the device 10 according to the invention, this device is designed such that without any pre-injection by means of the hardener component B a good mixing of the two components A and B and an error-free, ready-to-use filler compound is achieved in that the hardener component B during insertion into the mixing chamber 63 of the mixing device 60 impinges directly on the simultaneously introduced binder component A and thus simultaneously subject to the mixing process. The device 10 is according to Fig. 9 formed in such a way that the supply channel 36 in the region of its end portion 36a for the hardener component B in the device plate 30 has a diameter of preferably 1.5 mm to 1.6 mm and that the mixing device 60 on the device plate 30 in the region Outlet openings 33, 34 for the two components A and B is arranged such that the outlet opening 34 for the hardener component B in the device plate 30 at the inlet opening 65 and inlet hole for the hardener component B of the mixing chamber 63 abuts and with this congruent is, wherein the distance of the outlet opening 34 to the inlet opening 65 of the mixing chamber 63, the wall thickness of the mixing chamber wall 63a is preferably 1 mm. The diameter of the feed channel 36 is sized larger than the diameter of the feed channel portion 36a, as the Fig. 9 shows.

Characterized in that the distance between the outlet opening 34 for the hardener component B and the inlet opening 65 of the mixing chamber 63 corresponds to the thickness of the chamber wall 63 a, preferably 2 mm, the path length for the flow of the curing agent component B from the outlet opening 34th up to the inlet opening 65 or until it enters the mixing chamber 63 very briefly with the result that the infiltrating in the mixing chamber 63 hardener component B meets the simultaneously flowing binder component A. By means of the rotating rotor part 62, the mixing teeth 67, 68 are then used to mix the two components A and B to form the ready-to-use filler SM, which is dispensed or deposited on a spatula 5 (FIG. Fig. 9 ).

Since the hardener component B has a lower viscosity compared to the viscosity of the binder component A, the hardener mass when pressed out of its cartridge-like container 40 and when passing through the feed channel 36 in the device plate 30 due to the fact that micro in the hardener - Air bubbles are compressed. If the pressure is taken back to the hardener mass, then an expansion of the hardener mass takes place, with the result that a backflow of hardener mass takes place.

In order to prevent this backflow of hardener component B, a check valve 80 is arranged in the supply channel 36 for the hardener component B, whose arrangement in the supply channel 36 and its configuration in the Fig. 10 . 11 . 12 and 13 is shown. Preferably, the check valve 80 is disposed in the supply passage section 36a. In addition to a check valve 80 from a spring-loaded ball and check valves otherwise designed differently.

The check valve 80 is set so that at a minimum pressure on the check valve by flowing back hardener mass, the check valve is closed, so that a reflux is prevented.

Claims (5)

1. Apparatus (10) for mixing at least two components, in particular a binder component (A) arranged in a can-shaped container (40) with an outlet opening (42) arranged centrally or eccentrically in the container floor plate (41) and having a circular shape, with a curing component (B) arranged in a cartridge-type container (50) with an outlet opening (52) formed in the container floor plate (51), to give a pasty mixed material for preparing a ready-to-use filler for filling surfaces of vehicle bodies, wherein the curing component (B) consists of a curing paste with or without entrapped micro air bubbles having the property to relax to achieve a self-acting outflow of a small amount of curing material after pressure loading and pressure relief, and wherein the apparatus (10) comprises an apparatus component (20), in which the containers (40, 50) having pressurizable sliding bottoms (43; 53) in their interior space are arranged vertically upright or lying horizontally and in which an apparatus plate (30) having an inlet opening (31) for supplying the binder component (A) from the can-shaped container (40) connectable to said apparatus plate (30) and with at least one further inlet opening (32) for supplying the curing component (B) from the cartridge-type container (50) arranged on or at said apparatus plate (30) is arranged vertically upright or lying horizontally, wherein the inlet openings (31, 32) are connected via feed channels (35, 36) in said apparatus plate (30) to outlet openings (33, 34) formed in the apparatus plate (30), which can be connected to a number of inlet openings (64, 65) of a mixing device (60) arranged at the apparatus plate (30) corresponding to the number of outlet openings (33, 34) in said apparatus plate (30), characterized in that,

   a) that the binder component (A) and the curing component (B) can be supplied to the mixing chamber (63) of the mixing device (60) by means of control devices in such a way that a small quantity of curing component (B) can be supplied by expanding the micro air bubbles as a pre-injection with respect to the supply of the binder component (A), wherein said apparatus (10) has a cartridge-type container (50) filled one half or three-quarters with the curing component (B) for an efficient expansion of micro air bubbles, wherein the outlet opening (34) in said apparatus plate (30) for the outlet of the curing component (B) is arranged at a distance of preferably 1 mm from the inlet opening (65) of the mixing chamber (63) of the mixing device (60) for a path length of 1 mm for the flow of the curing component (B) in the mixing chamber (63), wherein the said feed channel (36) for the curing component in said apparatus plate (30) in an end section (36a) adjacent to the outlet opening (34) of the apparatus plate (30) has a diameter of preferably 1.5 mm or 1.6 mm, wherein the feed channel (36) except the end section (36a) has a larger diameter, preferably 6.0 mm, compared to the end section (36a) and wherein a quantity of 0.1 grams to 5.0 grams, preferably 0.2 grams of curing component B can be injected into the mixing chamber (63) of the mixing device (60) before the beginning of the continuous mixing process by the expansion of the micro air bubbles,
   and / or

   b) that the feed channel (36) for the curing component (B) having a lower viscosity compared to the viscosity of the binder component (A) in the region of its end section (36a) has a diameter of 1.5 mm to 1.6 mm, that the feed channel (36) except the end section (36a) has a larger diameter, preferably 6.0 mm, compared to the end section (36a), wherein the mixing device (60) is arranged at the apparatus plate (30) in the region of its outlet openings (33, 34) for the two components (A) and (B) such that the outlet opening (34) for the curing component (B) in the apparatus plate (30) touches the inlet opening (65) or inlet borehole for the curing component (B) of the mixing chamber (63) and is congruent with the latter, wherein the distance of the outlet opening (34) to the inlet opening (65) of the mixing chamber (63) of the wall thickness of the mixing chamber wall (63a) is preferably 1 mm, and that the path length for the flow of the curing component (B) from the outlet opening (34) in the apparatus plate (30) into the mixing chamber (63) of the mixing device (60) corresponds to the wall thickness of the chamber wall (63a) of the mixing chamber (63).
2. Apparatus according to claim 1, characterized in that a check valve (80) is disposed for preventing a back flow of the curing component (B) after lifting the pressing power on the curing agent mass in the feed channel (36) for the curing component (B) in said apparatus plate (30), the check valve being adjusted such that at a minimum pressure on the check valve (80) by refluent curing agent mass, the check valve (80) is closed, so that a backflow is prevented.
3. Apparatus according to one of the preceding claims 1 or 2, characterized in that the apparatus plate (30) is formed in blocks and has inlet openings (31, 32) and outlet openings (33, 34) for the binder component (A) and the curing component (B) and feed channels (35, 36) connecting the inlet openings (31, 32) with the outlet openings (33, 34) as well as a mounting for the mixing device (60) operatively connectable to the apparatus plate (30).
4. Apparatus according to one of the preceding claims 1 to 3, characterized in that the mixing device (60) has a number of inlet openings (64, 65) corresponding to the number of outlet openings (33, 34) in the apparatus plate (30) corresponding to the outlet openings (33, 34) and consists of a hollow cylinder-like stator part (61) with a dispensing or outlet opening (66) formed in its wall for the mixed material and the filler (SM) and of a motor-driven rotor part (62) concentrically arranged in the stator part (61) and rotatable about a longitudinal axis (LA), with an annular gap-like mixing chamber (63) formed between the stator part (61) and the rotor part (62), wherein several first mixing teeth (67) integrally moulded in the inner wall surface of the stator part (61) extend radially inward and several second mixing teeth (68) integrally moulded in the outer wall surface of the rotor part (62) extend radially outwards into the mixing chamber (63), in order to move the mixing teeth (67, 68) against each other by means of a rotational movement of the rotor part (62) in the stator (61), in order to generate a mixing of the components (A, B), wherein the stator part (61) has at least one inlet opening (65) for the curing component (B) connected to the mixing chamber (63) and wherein the first mixing teeth (67) of the stator part (61) are arranged on a first mixing teeth plane (70) and the second mixing teeth (68) of the rotor part (62) are arranged on a second mixing teeth plane (71), wherein the mixing teeth planes (70, 71) are arranged in floors offset from one another axially in the direction of the longitudinal axis (LA), so that the second mixing teeth (68) of the rotor part (62) revolve radially in the respective intermediate spaces of the first mixing teeth (67) of the stator part (61), wherein several mixing teeth planes (70, 71) on the rotor part (62) and / or on the stator part (61) are provided, wherein preferably the number the mixing teeth planes (70, 71) on the rotor part (62) is equal to the number on the stator part (61).
5. Use of an apparatus for mixing at least two components, in particular of a binder component (A) with a curing component (B) in a pasty mixed material for preparing a ready-to-use filler for filling surfaces of vehicle bodies, having the features according to one of the preceding claims 1 to 4 in order to shorten the path of the curing component (B) to the binder component (A) in the mixing chamber (63) of the mixing device (60) for achieving a uniform time until gelation of the two components (A, B) of 2 to 3 minutes.

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