DE9218334U1 - Multi-component processing device - Google Patents

Description

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Multi-component processing device

The innovation relates to a device for mixing and applying a mass consisting of at least two components according to the preamble of claim 1.

Devices for mixing two or more components and for applying a mixed mass are known both in the DIY market and for professional applications and are used for a wide variety of tasks, in particular for bonding.

Such a device, known as a two-component adhesive set, is known from GBM G 86 26 736.1. This adhesive set consists mainly of a cartridge with a flat base and into which one of the components to be mixed is already filled. This adhesive set also has an extrusion piston and a threaded rod, whereby the threaded rod can be brought into operative connection with the extrusion piston. The second component is filled into the cartridge from a tube. The two components are mixed in the conventional way using a mixing rod. The disadvantage of this adhesive set is that the two components can be mixed with conventional

Stirring tools, especially in the edge zones of the flat base, cannot mix sufficiently homogeneously. The quality of the mixing with such an adhesive set is more or less left to the subjective perception of the user, as no objective standard for the type of mixing or the mixing movements can be defined. Furthermore, the contents of the cartridge cannot be sufficiently pressed out by the dispensing piston, so that a not insignificant proportion of the components remain in the cartridge. In addition, mixing components of different viscosities with such an adhesive set is only possible to a very limited extent.

In order to achieve the best possible quality of a multi-component adhesive that is processed or mixed using a generic device, the following three points should be given the utmost attention:

1. the adhesives must be mixed as homogeneously as possible;

2. the adhesives must be dosed very precisely; and

3. The adhesives should be ready for use in the shortest possible time and mixed homogeneously so that the curing process does not start before processing and thus the processing time is not exceeded.

Since modern adhesive technology places ever higher demands on adhesives and their areas of application are constantly growing, the three points listed above will become even more important in the future.

Another problem when mixing two or more components is that, up to now, only components with similar viscosity could be processed using generic devices, since otherwise heterogeneous mixing would have to be expected.

Such a device should also be simple and logically constructed so that incorrect manipulations are excluded even by laypeople or at least reduced to an absolute minimum.

The aim of the innovation is to create a device in which even materials with very different viscosities can be mixed homogeneously in a simple manner. This aim is achieved by the features listed in the characterizing part of claim 1.

A mixing device as described in claim 1 creates a means which allows different components to be mixed together under precisely specified conditions. For example, it is possible to allow the user to carry out a certain number of strokes of the

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The piston rod connected to the mixing element is to be specified and thus a predefinable, optimal mixing of the components is to be ensured.

In a preferred embodiment, the mixing element has rotationally symmetrically arranged, curved and essentially radially extending and possibly twisted blades. By designing the mixing blades in this way, it can be achieved that the components to be mixed are
a lifting movement of the mixing element can be set into a rotation, whereby the rotation of the components when the mixing element is moved downwards is opposite to the rotation when it is pulled up.

In a further preferred embodiment, a safety device is provided which serves as a rear stop for the
As a result, the mixing space in the container is limited on one side by the bottom with a closed outlet opening and on the other side by the squeezing piston. With such a design, the components to be mixed cannot escape during the mixing process, so that the lifting movements of the mixing element
Forced mixing between the components takes place. A
Such a design is particularly suitable for mixing components with different viscosities.
With such a device it is possible to

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to mix liquid components with pasty components homogeneously. Of course, all intermediate stages are also possible.

In a further embodiment, the handle attached to the end of the piston rod can be broken off at a predetermined breaking point. After breaking off this handle, the piston rod can be connected to a drill, for example. This means that in addition to the lifting movement, a rotary movement can also be carried out. In addition, frictional heat can be introduced into the mixing process in this way, which, for certain components, results in an accelerated hardening process or reaction process.

A further design of the device provides that the bottom of the container is convexly curved inwards. Such a design has the advantage that streaks, which only form in very small quantities on the edge of the container when the components are mixed, are deposited in the edge area at the deepest points of the container when the mixed components are pressed out. Since the formation of streaks (poorly mixed components) during the mixing of the components cannot be completely ruled out even with the device according to the innovation, such a design of the bottom means that these streaks are not pressed out during the pressing process, but are deposited in the edge area at the deepest points of the container. Thus, with a

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Such a device meets higher quality requirements than before with regard to the mixed components, for example for adhesive bonds.

In addition to the well-known two-component adhesives, other multi-component adhesives as well as sealants, casting compounds, molding compounds, coatings and the like can also be used for processing with such a device.

In the following, an example of the innovation is explained in more detail using the attached drawings. The drawings show:

Fig. 1 shows the individual parts;

Fig.2 a longitudinal section through the container in the

ger state with a filled component;

Fig.3 a longitudinal section through the container in a

a first phase, when adding a second component;

Fig.4 a longitudinal section through the container in a

a second phase, during the mixing of the two components; and

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Fig.5 a longitudinal section through the container in a

a third phase, when the mixed components are pressed out.

The most important individual parts of the device for preparing and applying a mass consisting of at least two components are explained in Fig. 1. Known components that are not essential in connection with the innovation are not shown in this drawing.

The most important individual parts are: a container 1, a mixing element 2, an extrusion piston 3, a piston rod 4, a filling tip 5, a safety element 6 and a closure cap 7. The essentially cylindrical container 1 has on one, front side a convex inwardly curved base 16 and a tubular extension 11 with a central outlet opening 12 attached in the middle. An external thread 13 is attached to the extension 11. The container 1 is open on its other, rear side. In the end area of this rear side, a groove 15 is cut out of the inner wall of the container 1, which serves to accommodate the safety element 6.

The mixing element 2 has four mixing blades 21. These mixing blades 21 are arranged rotationally symmetrically, curved and run essentially in a radial direction, being surrounded by a ring

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22. These mixing blades 21 also preferably have a radial twist. There is also a central bolt 23 from which the mixing blades 21 extend radially and which has an internal thread 24 on its rear side. On the front side, the mixing element 2 has a circumferential sealing lip 25. The external diameter d of the mixing element 2 corresponds at least approximately to the internal diameter of the container 1 in the area of this sealing lip 25. On its rear edge, the mixing element 2 also has a circumferential projection 26.

The front of the mixing element 2, which is formed from the mixing blades 21, the sealing lip 25 and the bolt 23, has a curvature corresponding to the bottom 16 of the container 1. The rear of the mixing element 2 is also curved. There are also cams 28 on the rear.

The essentially cylindrically designed squeezing piston 3 has a central through-hole 31. On its front side it also has a circumferential sealing lip 32. The front side of the squeezing piston 3 is curved correspondingly to the rear side of the mixing element 2. On the inside of the sealing lip 32 there is a circumferential groove 33. The mixing element 2 can be snapped into this groove 33 with its rear projection 26. On its front side the squeezing piston 3 also has grooves 35 which are in position with the

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Cams 28 of the mixing element 2 correspond. A recess 34 is also recessed on the rear side of the squeezing piston 3.

The piston rod 4 has a thread 41 at the front end,
while it is provided with a handle 42 at the rear end. In front of the handle 42 a groove 43 is recessed, which
is intended as a predetermined breaking point for the handle 42.
At the rear end, immediately in front of the groove 43, the piston rod 4 also has webs 44. These webs 44 reinforce the piston rod 4 at the rear end when it is to be clamped into a drilling machine after the handle 42 has been broken off.

The filling tip 5 has on one side a connector 51 with an internal thread 52, by means of which the filling tip 5 can be screwed onto a tube.
51 is followed by a tubular mouthpiece 53, which
has several longitudinal slots 54 in the wall, which
extend approximately over half of the mouthpiece 53. The outer diameter dl of this mouthpiece 53 is selected so that
that it can be inserted into the container 1 via the outlet opening 12.

The securing element 6 has a sickle-shaped basic form, with clamping jaws 61 formed at both ends. The thickness
of the safety element 6 is designed in such a way that it can be

the groove 15 of the container 1 engages securely.

The closure cap 7 has an internal thread 71, by means of which it can be screwed onto the external thread 13 of the container 1. The closure cap 7 also has a bolt 72, the external diameter of which corresponds at least approximately to the internal diameter of the outlet opening 12, so that the outlet opening 12 is tightly closed by this bolt 72 when the closure cap 7 is screwed on. The end of the bolt 72 that extends into the container 1 has a surface that corresponds to the bottom 16 of the container 1.

The functioning of the device is explained using Figures 2 to 5. In Figure 2, the container is shown in the storage state. For this purpose, both the mixing element 2 and the squeezing piston 3 are inserted into the container 1. The rear side of the mixing element 2 lies flat against the front of the squeezing piston 3 and the projection is locked into the groove of the squeezing piston 3. In addition, in this state, the cams of the mixing element 2 are locked into the corresponding grooves of the squeezing piston 3.

Between the mixing element 2 and the bottom 16 of the container 1, one of the components 100 to be processed is already filled into the container 1 or was already filled when the

Device to the customer contained therein. The outlet opening 12 of the container 1 is closed by the closure cap 7. The component 100 is stored in a tightly sealed manner in the container 1 by the mixing element 2 and the squeezing piston 3 with the sealing lips resting on the wall of the container 1 on one side and the closure cap 7 screwed onto the extension 11 and closing the outlet opening 12 on the other side.

The filling of a second component into the container 1 is explained using Fig. 3. In order to achieve this state, the safety element 6 was previously locked into the groove 15 of the container 1 and the closure cap 7 was removed from the outlet opening 12 of the container 1. The filling tip 5 was then screwed onto a tube 86 containing the second component 101 and inserted into the container 1 through the outlet opening 12. By rolling up (squeezing out) the tube 86, the second component 101 enters the container 1 via the filling tip. In order to minimize the recoil effect of the second component 101 emerging from the tube 86 on the same, the filling tip 5 has longitudinal slots 54 in the mouthpiece. By squeezing out this component 101, excess pressure builds up in the container 1. This overpressure causes the mixing element 2 together with the squeezing piston 3 to be pushed backwards against the safety element 6. After emptying the tube 86, the closure cap 7 is finally put back on the

set 11 screwed on.

Fig. 4 shows the device in the phase in which the two components 100, 101 are mixed. For this purpose, the piston rod 4 was screwed into the thread 24 of the mixing element 2. The mixing element 2 can now be moved through the two components 100, 101 by lifting the piston rod. Since the two components 100, 101 are enclosed in the mixing space of the container 1, they cannot escape and are therefore forced to mix. In this way, a wide variety of components can be mixed together to form an end product 102. The range extends from pasty-pasty to liquid-liquid to pasty-liquid. Of course, more than one component can also be added and mixed with the other components already in the container 1. With such a device it is also possible to color transparent components such as silicone by adding color and then pressing them out as a colored end product or processing them further. This means that such a device creates new possibilities even in the DIY market.

A design of the mixing blades 21, as described with reference to Fig. 1, causes the components located in the mixing chamber to be set into rotation by the lifting movements of the mixing element 2, which when the

Mixing element 2 is opposite to the rotation when it is pulled up. This achieves optimal mixing of the components per unit of time. If the components are to be mixed even more intensively, the handle 42 of the piston rod 4 can be broken off at the predetermined breaking point 43 and the now free end can be clamped into a drill, for example, thereby setting the mixing element 2 into an additional rotary motion. By setting the mixing element 2 at a correspondingly high speed, frictional heat can be introduced into the mixing process in this way and the reaction process can be deliberately accelerated. So that the free end of the piston rod 4 is not crushed after the handle 42 is broken off when it is clamped into the drill chuck, the latter has webs 44 at the rear end, which also promote axially aligned clamping.

In order to be able to unscrew the piston rod 4 from the mixing element 2 again after the components have been mixed, the piston rod 4 and thus the mixing element 2 are pulled all the way back against the squeezing piston 3. The piston rod 4 is then turned to the left with a slight pull to loosen the right-hand thread. This causes the sawtooth-shaped cams 28 on the rear of the mixing element 2 to engage in the corresponding grooves 35 of the squeezing piston 3 and the piston rod 4 can thus be safely loosened, if necessary by holding the squeezing piston 3.

Such a design of the device creates a means of objectively quantifying the mixing process. For example, the user can see the number of
Stroke movements from stop (floor) to stop (extrusion piston resting on the safety device) can be specified or
By clamping it into a drilling machine, the speed and time can be defined. This allows a specific mixing
of the components, which ultimately results in high reproducibility and high quality of the final product 102.

The pressing out of the fully mixed components 102 from the container 1 is explained with reference to Fig. 5. For this purpose, known aids such as a threaded rod 83 and a closure lid 80 are used. The closure lid 80 is screwed onto the open end by means of a self-tapping thread 81.
of the container 1. Then the threaded rod 83 is screwed into the opening 82 of the closure cover 80 until its front end rests on the squeezing piston 3.
If the threaded rod 83 is now rotated further, it displaces the dispensing piston 3 in the direction of the bottom 16 of the container 1 and the two mixed components emerge in the form of the end product 102 via a dosing tip 89 screwed onto the extension 11.

Since it cannot be ruled out that during the mixing process

gang in the area of the wall of the container 1 a film in the form
of streaks has formed, it must be prevented that these streaks are also pressed out, since they would impair the quality of the end product 102. This is ensured by the concave inward curvature of the container base 16, since these streaks are deposited in the edge area of the base 16 at its deepest points and are therefore not pressed out.

The pressing out of the mixed components 102 can
of course also be done with a standard compressed air or hand gun. In such a case, it is not necessary to unscrew the cover 80, as the entire container 1
is inserted into the gun and the actuating piston of the
Gun engages the dispensing piston 3.

The innovative device provides an aid
has been created, which allows several different components to be mixed and processed homogeneously in a simple way.

Claims (24)

Protection claims 1. Device for mixing and applying a mass consisting of at least two components (100, 101), which has a container (1) for receiving the components (100, 101) to be mixed, the container (1) having a base (16) on the front side with an outlet opening (12) arranged centrally therein and an opening on the rear side that can be closed by a lid (80), and an ejection piston (3) for ejecting the mixed mass (102), characterized in that a mixing element (2) to be inserted into the container (1) or inserted into the container (1) is provided for mixing the components (100, 101) received in the container (1), the largest outer diameter (d) of which corresponds at least approximately to the inner diameter of the container (1) and which can be brought into operative connection with a piston rod (4) and can be actuated by the latter. 2. Device according to claim 1, characterized in that the bottom (16) of the container (1) is curved at least on its inside and that the mixing element (2) has a corresponding curvature on its front side. 3. Device according to claim 2, characterized in that the curvature of the bottom (16), seen from the inside of the container (1), is convex. 4. Device according to one of the preceding claims, characterized in that both the squeezing piston (3) and the mixing element (2) are arranged axially movable and axially aligned one behind the other in the container (1), the mixing element (2) being closer to the outlet opening (12) of the container (1). 5. Device according to one of the preceding claims, characterized in that the rear surface of the mixing element (2) is designed to correspond in shape to the front side of the squeezing piston (3), such that the mixing element (2) in the retracted state rests with its rear side over the entire surface of the squeezing piston (3). 6. Device according to one of the preceding claims, characterized in that the container (1) in the storage state, before the mixing element (2) is put into operation, already contains a component (100), preferably a non-reactive component. 7. Device according to one of the preceding claims, characterized in that the outlet opening (12) is closed by a closure cap (7) and the squeezing piston (3) together with the mixing element (2) is pushed into the container (1) to such an extent that the component (100) contained in the container is thereby enclosed and sealed. 8. Device according to one of the preceding claims, characterized in that the mixing element (2) has rotationally symmetrically arranged, curved blades (21) running essentially in the radial direction. 9. Device according to claim 8, characterized in that the wings (21) are twisted. 10. Device according to claim 8 or 9, characterized in that the mixing element (2) has a sealing lip (25) on its front side, which, when the mixing element (2) is inserted, lies sealingly against the inner wall of the container (1). 11. Device according to one of the preceding claims, characterized in that the squeezing piston (3) has a central, axial through-bore (31) whose diameter is at least as large as the outer diameter of the piston rod (4). 12. Device according to one of the preceding claims, characterized in that the piston rod (4) at its front end has an external thread (41), and that the mixing element (2) has an internal thread (24) which corresponds to the external thread (41) of the piston rod (4). 13. Device according to claim 12, characterized in that the piston rod (4) has a handle (42) at its rear end facing away from the thread (41). 14. Device according to claim 13, characterized in that the piston rod (4) has a groove (43) located axially in front of the handle (42), which is provided as a predetermined breaking point for breaking off the handle (42). 15. Device according to claim 14, characterized in that the piston rod (4) has webs (44) extending from the surface of the piston rod (4) in front of the predetermined breaking point (43) and rising towards the predetermined breaking point (43). 16. Device according to one of the preceding claims, characterized in that the mixing element (2) has sawtooth-shaped cams (28) on its rear side, and that the squeezing piston (3) has correspondingly arranged grooves (35), such that the mixing element (2) can be rotated to one side when it is resting on the squeezing piston (3) by the cams (28) skipping over the grooves (35), while when it is rotated to the other side the cams (28) engage in the grooves (35). 17. Device according to one of the preceding claims, characterized in that the squeezing piston (3) has on its front side a circumferential sealing lip (32), the outer diameter of which corresponds at least approximately to the inner diameter of the container (1), and that on the inside of the sealing lip (32) a circumferential groove (33) is let in such a way that the rear end of the mixing element (2) facing the squeezing piston (3) can be locked into the groove (33) of the squeezing piston (3). 18. Device according to claim 1, characterized in that the bottom (16) of the container (1) is provided with a tubular, outwardly projecting extension (11) which has an external thread (13) and in which the outlet opening (12) is let. 19. Device according to claim 18, characterized in that a closure cap (7) is provided for the outlet opening (12), which can be screwed onto the external thread (13) of the extension (11) by means of a thread (71) and by means of which the outlet opening (12) can be closed by means of a bolt (72) engaging therein and lying flat against the inside of the base (16). 20. Device according to one of the preceding claims, characterized in that a substantially tubular filling tip (5) is provided, which has a tubular mouthpiece (53) whose outer diameter (dl) corresponds at least approximately to the inner diameter of the outlet opening (12) present in the extension (.11) of the container (1), the mouthpiece (53) having a central outlet opening (55) and longitudinal slots (54) in the wall. 21. Device according to claim 20, characterized in that the filling tip (5) has an internal thread (52) for receiving a tube (86) which contains a further component (101). 22. Device according to one of the preceding claims, characterized in that a securing element (6) is provided which can be locked in the rear region of the container (6) in a groove (15) recessed on the inside of the container. 23. Device according to claim 22, characterized in that the securing member (6) is designed as a clamping clip with molded-on clamping jaws (61), wherein the clamping jaws (61) in the engaged state of the clamping clip (6) form a rear, rear stop for the squeezing piston (3) form. 24. Device according to one of the preceding claims, characterized in that the lid (80) closing the rear, open end of the container (1) has an axial passage opening (82) for a threaded rod (83) and that the lid (80) has a self-tapping thread (81) by means of which it can be screwed onto the container (1) at the rear, open end.