EP3733271A1 - Mixer with rest reservoir - Google Patents

Abstract

Mixer 1 for connection to a two- or multi-component cartridge, which contains at least a first component A and a second component B, comprising an inlet area 3, a calming area 4 and a mixing area 5, the calming area 4) being between the inlet area 3 and the mixing area 5 is arranged.

Description

TECHNICAL AREA

Mixer for connection to a two- or multi-component cartridge which contains at least a first component A and a second component B, comprising an inlet area, a calming area and a mixing area, the calming area being arranged between the inlet area and the mixing area.

STATE OF THE ART

There is a broad field for applications in which two components are only brought together immediately before use in order to produce the substance to be used (e.g. adhesives or sealants in the construction industry, medical technology, automotive sector, etc.) and to process it immediately afterwards. As a rule, this is a basic substance in which a corresponding reaction is caused by contact with an activating substance or by the chemical interaction of the two components.

In order to obtain a material that is mixed as evenly as possible, it is particularly important that the starting components are mixed as well as possible. There are already many known mixing structures in the prior art for mixing the two starting components, e.g. through splitting, diversion, partial mixing of the strands, etc ..

Mixing is problematic if the starting materials are present in different proportions and / or the rheological properties are different, e.g. when one component is much more fluid than the other. In particular, different flow rates prevent the components from being mixed immediately when they enter the mixer.

OBJECT OF THE INVENTION

The invention is therefore based on the object of providing a mixing device in order to uniformly mix at least two starting components with different amounts and different rheological behavior with one another.

TECHNICAL SOLUTION

The object is achieved by a mixer for connection to a two- or multi-component cartridge according to claim 1.

The mixer for connection to a two- or multi-component cartridge with a longitudinal axis L, which contains at least a first component A and a second component B, comprises an inlet area, a calming area and a mixing area, the calming area being arranged between the inlet area and the mixing area, wherein the inlet region has at least one first inlet opening for the entry of the first component A into the Having a calming area and a second inlet opening for the inlet of the second component B into the calming area, the first inlet opening having a first size F _A and the second inlet opening having a second size F _B , the calming area having a first calming chamber with a first volume V _A , and a second calming chamber with a second volume V _B , the first component A flowing into the first calming chamber via the first inlet opening in a first flow direction and the second component B flowing via the second inlet opening into the second calming chamber in a second flow direction, wherein the first calming chamber and / or the second calming chamber are connected to the mixing area, and the calming area has a partition between the first calming chamber and the second calming chamber, which separates the first volume V _A from the second volume V _B , and at least one transversely and / or vertically ht wall arranged to the first and / or second flow direction for slowing down and / or deflecting the first inflowing component A and / or the second inflowing component B at the mixer-side end of the calming area.

The wall is referred to below as a radial wall (as opposed to axial walls). However, this does not mean that the claimed scope of protection is restricted to a specific cross-sectional shape of the mixer.

As a rule, the starting components have different proportions depending on their respective use and, due to their different specific chemical and material properties, also have a different rheology.

The two starting components are usually ejected from the cartridges by a common force and mixed with one another in the mixing area. The mixed substance corresponds to the proportions of the starting substances. In a calming area arranged in front of the mixing area, a particularly flowable starting component can be slowed down or calmed down in order to achieve improved mixing. For this reason, the calming area is divided into two chambers according to the starting components. For braking or calming or deflecting, at least one calming chamber has a radial wall which is transverse and / or perpendicular to the fluid flow of the respective starting component, brakes and / or deflects it. The fluid flow of the starting component, which is usually more fluid, is slowed down and subsequent mixing with the slower component is improved.

The mixer preferably has a mixer structure for separating and bringing together strands of component A and component B.

For this purpose, the mixed structure comprises one or more different geometries, e.g. vertical or inclined baffles, and baffles, redistribution chambers, passages, etc., to influence the fluid flows of the different starting components and mix them with one another. Usually the strands in the mixer structure are separated and brought back together several times.

Advantageously, the ratio of the first size F _A to the second size F _B largely corresponds to the ratio of the first volume V _A to the second volume V _B.

The ratio of the respective amount of a starting component, which is expressed by the size F of the respective inlet opening, corresponds to the ratio of the volumes V of the respective calming chambers in order to achieve a uniform mixing.

The ratio is V _A / V _B = F _A / F _B +/- 50% ^∗ F _A / F _B , in particular V _A / V _B = F _A / F _B +/- 25% ^∗ F _A / F _B , especially V _A / V _B = F _A / F _B +/- 10% ^∗ F _A / F _B.

The first size F _A is preferably equal to or greater than the second size F _B , and the first volume V _{A of} the first calming chamber is equal to or greater than the second volume V _{B of} the second calming chamber.

Due to the fact that different quantities of starting components are present, the sizes F of the inlet openings also differ, according to which the starting component which is larger in terms of quantity also has a larger outlet opening. The same applies to the volumes V of the calming chambers.

The first calming chamber and / or the second calming chamber advantageously has a dead volume arranged in front of the radial wall. The dead volume is in particular filled with the component. The mass already present in the dead volume decelerates the inflowing mass.

The first component A and / or the second component B is braked and / or deflected in the area of the dead volume.

The dead volume is used for (short-term) storage or buffering of the (mostly) flowable starting component, the fluid flow of which is deflected from the radial wall. As a result, the fluid flow is slowed down (calmed down) and, if necessary, subsequently deflected.

The first calming chamber and / or the second calming chamber has at least one deflection wall which is arranged parallel to the L axis or along the L axis.

The slowed fluid flow is deflected by the deflection wall.

The deflection wall advantageously adjoins the radial wall and the walls delimit the dead volume.

In this way, a space is formed in which the fluid flow is initially slowed down, collected, and then deflected and passed on. As a result, the flow of a very flowable starting component is slowed down and the subsequent mixing with the other starting component, which flows more slowly, is facilitated.

In a particularly preferred embodiment, the first calming chamber and / or the second calming chamber of the mixer has at least one partition wall, which is arranged along the longitudinal axis L, which divides the first calming chamber and / or the second calming chamber into two sub-chambers.

The fluid flow of the component is divided into two partial flows by the partition wall. These can then be diverted separately. This will facilitate the subsequent mixing with the other component

The first calming chamber and / or the second calming chamber preferably has at least one connection opening to the mixing area, which is used to dispense component A and / or component B into the mixing area and / or to mix component A with component B.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1

Overall perspective view of a mixer

Figure 1A

Perspective detailed representation of the inlet area with calming area of the components A and B of the mixer Figure 1 ;

Figure 1B

Perspective detailed representation of the inlet area with calming area of component B of the mixer Figure 1 ;

Figure 2

Overall perspective view of a second embodiment of the mixer with two helical sections;

Figure 3

Overall perspective view of a third embodiment of the mixer with two helical sections and with further baffle walls in the calming area;

Figure 3A

Perspective detailed representation of the inlet area with calming area of component A of the mixer Figure 3 ;

Figure 3B

Perspective detailed view of the inlet area with calming area of component B of the mixer Figure 3 ;

Figure 4

Overall perspective view of a fourth embodiment of the mixer with a reduced volume of the calming area;

Figure 4A

Perspective detailed representation of the inlet area of component A and the calming area of Figure 4 ;

Figure 4B

Perspective detailed representation of the inlet area of component B and the calming area of Figure 4 .

DESCRIPTION OF PREFERRED EMBODIMENTS

The invention is illustrated below with the aid of non-exhaustive exemplary embodiments.

The Figures 1 , 1A and 1B show a first embodiment of the mixing device 1 for arrangement in a mixer housing (not shown). The mixer 1 with a longitudinal axis L and a radius R has a connection area 2 for connection to a two- or multi-component cartridge (not shown) which contains at least a first component A and a second component B. In the example shown, there is a different quantity or mixing ratio (and possibly different viscosity) between the two components, with a significantly larger amount of component A being present.

The mixer 1 has an inlet area 3, a calming area 4 and a mixing area 5.

The inlet area 3 has a first inlet opening 31 for the first component A and a second inlet opening 32 for the second component B. The inlet openings 31 and 32 open into the calming area 4.

The calming area 4 comprises a first calming chamber 41 with a first volume V _A , and a second calming chamber 42 with a second volume V _B. The two calming chambers 41 and 42 are separated from one another by a partition 6. The first Calming chamber 41 and the second calming chamber 42 are connected to the mixing region 5.

The mixing area 5 has a continuous mixing structure 51 for mixing the two components A and B.

The Figures 1A and 1B show the calming area 4 with the inlet area 3 with the first inlet opening 31 with a first size F _A and the second inlet opening 32 with a second size F _B in detail. The first inlet opening 31 is approximately four times larger than the second inlet opening 32 in this example.

Out Figure 1A the inlet opening 31 of the component A and the specific structure of the subsequent first calming chamber 41 with a first volume V _{A of} the calming area 4 emerges.

The first calming chamber 41 is divided by a partition wall 9, which is arranged along the longitudinal axis L, into two sub-chambers 411 and 412, each with a first collection area 4111 and 4121 and each with a second collection area 4112 and 4122, whereby the fluid flow of component A into two Partial flows is divided. The two sub-chambers 411 and 412 are structurally identical.

The first calming chamber 41 also has a radial wall 7 along the radius R, that is to say perpendicular to the longitudinal axis L, which blocks or decelerates the fluid flow or the partial flows of component A. In addition, the first calming chamber 41 has a deflecting wall 8. The deflecting wall 8, together with the partition wall 9, the radial wall 7, the wall of the inlet area and the mixer housing, forms a first collecting area with a dead volume in which the (partial) fluid flow is slowed down and collected or calmed.

The deflecting wall 8 is not pulled right through to the wall of the inlet area and thus forms an opening 81. The deflecting wall 8 therefore (partially) separates the first collecting area 4111 and the second collecting area 4112. The deflecting wall 8 is used to deflect and forward the fluid flow to the second Collection area 4112.

The second collection area 4112 is formed by the deflection wall 8, the partition wall 9, the radial wall 7, the wall of the inlet area and the mixer housing (not shown). The radial wall 7 has a connection opening 71 to the mixing region 5. The second collecting area 4112 has the effect that the fluid flow is slowed down or backed up again and a calming occurs. The fluid stream flows into the mixer region 5 via the connection opening 71.

From the Figure 1B it can be seen that the dividing wall 9 also divides the second calming chamber 42 into two sub-chambers 421 and 422, whereby the fluid flow of component B is divided into two partial flows. Each of the sub-chambers 421, 422 is in spatial connection with the adjoining mixer structure 51 and is suitable for conveying the fluid flow or the partial flows of component B into the mixer structure 51.

From the Figure 2 shows a second embodiment of the invention. The inlet area 3 and calming area 4 of the mixer are identical to the first embodiment. The mixing structure 51 of the mixing area 5 has two helical structures 52 which serve to mix the two starting components.

The Figures 3 , 3A and 3B show a third embodiment of the invention. Here, the mixing structure 51 with two helix structures 52 corresponds to the mixing area 5 of the second embodiment. The calming area 4, in particular the first calming chamber 41, has differences in the structural design with regard to the first two embodiments, which will be discussed below.

Figure 3A shows the first calming chamber 41 in detail. The partition wall 9 again divides the calming chamber 41 into two structurally identical sub-chambers 411 'and 412'. The first sub-chamber 411 'is divided into three collecting areas 4111', 4112 ', 4113' by three radial walls 7 ', 72, 73. The second sub-chamber 412 'is also divided into three collecting areas 4121', 4122 ', 4123' (not shown). The radial wall 7 'is basically drawn as far as the partition 6, apart from a cutout which forms an opening 71' between the mixer housing (not shown) and the partition 6. The fluid flow of component A or the partial fluid flows collide with the radial wall 7 ', are accumulated in the first collecting area 4111' and are then passed on to the second collecting area 4112 '. The fluid flow hits the second radial wall 72, is again dammed and passed on into the third collecting area 4113 '. The third radial wall 73 has an opening 731, which then merges into the mixer structure 51.

Out Figure 3B it can be seen that the second calming chamber 42 is largely identical to the first two embodiments, in particular is separated into two sub-chambers 421 and 422 by the partition wall 9.

From the Figures 4 , 4A and 4B shows a fourth embodiment of the invention. Again, according to the second and third embodiment, the mixing structure 51 has, inter alia, two regions with a helical structure 52, which are each arranged between the basic mixer structure. The main difference is that the first calming chamber 41 is basically divided into two sub-chambers 411 "and 412" (only 412 "is visible), but only one sub-chamber 412" serves to convey the fluid flow of component A and the other sub-chamber 411 "does not is filled or separated from component A and forms a cavity. This measure is used to adapt the two starting components, for example if component B is significantly more viscous than component A. Therefore, the first calming area 41 has a wall 91 which is fully pulled through to the mixer housing to form the two sub-chambers 411 "and 412".

From the Figure 4A the first calming area 41 emerges in detail. Basically, the partition wall 9 divides the first (and second) calming area into two sub-chambers 411 ″ and 412 ″. The first calming area is divided into three collecting areas 4121 ", 4122", 4123 "by appropriate radial walls. The fluid flow of component A reaches the first collecting area 4121" of the first calming area 41 via the inlet opening 31 and there hits the vertical radial wall 7 " The first collecting area 4121 ″ has a further wall 91 which completely separates the two sub-chambers 411 ″ and 412 ″ from one another. Together with the radial wall 7 ″, the partition wall 6, the wall of the inlet area and the mixer housing, the wall 91 forms the first collecting area 4121 ″. In addition, the dividing wall 9 forms a further dead volume in the first collecting area 4121 ″, in which the fluid flow of component A is collected and calmed.

The radial wall 7 ″ has a connection opening 71 ″ through which the fluid flow of component A passes into the second collecting area 4122 ″. There the fluid flow meets a second radial wall 72 ′ and is directed to a connection opening 721 ′ arranged therein, which is radially offset to the first connection port 71 ″. This is followed by the third collecting area 4123 ″ with a third radial wall 73 'with the opening 731', which merges into the mixer structure 51. The connecting openings 721 'and 731' are arranged radially offset from one another so that the fluid flow flows through both collecting areas, i.e. is redirected and calmed down accordingly.

Figure 4B shows the second inlet opening 32 with the adjoining second calming area 42, which structurally corresponds to that of the aforementioned embodiments or is divided into two sub-chambers by the wall 9.

In addition, the area of the first calming chamber 41 or the sub-chamber 411 ″ can be seen which is / are not filled by component A, since the area is completely separated by the wall 91 from the area into which the first opening 31 opens.

REFERENCE LIST

• 1 mixer
• 2 connection area
• 3 inlet area
• 31-First inlet port
• 32-Second inlet port
• 4-calming area
• 41-First calming chamber
• 411, 411 ', 411 "-First sub-chamber
• 4111, 4111 ', 4111 "-First catch area
• 4112, 4112 '. 4112 "-Second collection area
• 4113'-Third Collection Area
• 4113 ', 4113 "-third containment area
• 412, 412 ', 412 "- Second sub-chamber
• 4121, 4121'-first catchment area
• 4122, 4122'-Second collection area
• 4123 ', 4123 "-third containment area
• 42-Second calming chamber
• 421-First sub-chamber
• 422-Second subchamber
• 5 mixing area
• 51 mixer structure
• 52 helix structure
• 6 partition
• 7, 7 ', 7 "radial wall
• 71, 71 'connection opening
• 72'-second radial wall
• 721 'connection opening
• 73, 73'-Third radial wall
• 731, 731 'connection port
• 8 baffle
• 81 opening
• 9 partition wall
• 91 wall
• F _A - First size of the first inlet opening 31
• F _B -Second size of the second inlet opening 32
• L longitudinal axis
• R radius
• V _A - First volume of the first calming chamber 41
• V _B -Second volume of the second calming chamber 42

Claims (11)

Mixer (1) for connection to a two- or multi-component cartridge with a longitudinal axis L, which contains at least a first component A and a second component B, comprising an inlet area (3), a calming area (4) and a mixing area (5), wherein the calming area (4) is arranged between the inlet area (3) and the mixing area (5),
wherein the inlet area (3) has at least one first inlet opening (31) for the entry of the first component A into the calming area (4) and a second inlet opening (32) for the inlet of the second component B into the calming area (4), the first inlet opening (31) has a first size F _A and the second inlet opening (32) has a second size F _B ,
wherein the calming area (4) has a first calming chamber (41) with a first volume V _A , and a second calming chamber (42) with a second volume V _B ,
wherein the first component A flows via the first inlet opening (31) in a first flow direction into the first calming chamber (41) and the second component B flows via the second inlet opening (32) in a second flow direction into the second calming chamber (42),
the first calming chamber (41) and / or the second calming chamber (42) being connected to the mixing area (5), and the calming area (4) having a partition (6) between the first calming chamber (41) and the second calming chamber (42) which delimits the first volume V _A from the second volume V _B , and at least one wall (7, 7 ', 7 ") arranged transversely and / or perpendicular to the first and / or second flow direction for decelerating and / or deflecting the first inflowing Component A and / or the second inflowing component B at the mixer-side end of the calming area (4). Mixer (1) according to Claim 1, characterized in that the mixing region (5) has a mixer structure (51) for separating and bringing together strands of component A and component B. Mixer (1) according to Claim 1 or 2, characterized in that the ratio of the first size F _A to the second size F _B largely corresponds to the ratio of the first volume V _A to the second volume V _B. Mixer (1) according to one of the preceding claims, characterized in that the ratio V _A / V _B = F _A / F _B +/- 50% ^∗ F _A / F _B , in particular V _A / V _B = F _A / F _B +/- 25% ^∗ F _A / F _B , especially V _A / V _B = F _A / F _B +/- 10% ^∗ F _A / F _B Mixer (1) according to one of the preceding claims, characterized in that the first size F _{A is} equal to or greater than the second size F _B , and the first volume V _{A of} the first calming chamber (41) is equal to or greater than the second volume V _{B of} the second calming chamber (42) Mixer (1) according to one of the preceding claims, characterized in that the first calming chamber (41) and / or the second calming chamber (42) has a dead volume arranged in front of the radial wall (7, 7 ', 7 "). Mixer (1) according to Claim 8, characterized in that the first component A and / or the second component B is braked and / or deflected in the area of the dead volume. Mixer (1) according to one of the preceding claims, characterized in that the first calming chamber (41) and / or the second calming chamber (42) has at least one deflection wall (8) which is arranged parallel to axis L or along axis L. Mixer (1) according to Claim 8, characterized in that the deflecting wall (8) adjoins the radial wall (7), and the walls delimit the dead volume. Mixer (1) according to one of the preceding claims, characterized in that the first calming chamber (41) and / or the second calming chamber (42) has at least one partition wall (9) which is arranged along the longitudinal axis that the first calming chamber (41 ) and / or divides the second calming chamber (42) into two sub-chambers (411, 412; 411 ', 412'; 421, 422; 421 ', 422'). Mixer (1) according to one of the preceding claims, characterized in that the first calming chamber (41) and / or the second calming chamber (42) have at least one connection opening (71, 71 ', 721', 731, 731 ') to the mixing area (4 ), which is used to dispense component A and / or component B into the mixing area (4) and / or to mix component A with component B.

Images