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1. WO2020201045 - DYNAMIC MIXER, DISPENSING ASSEMBLY AND METHOD OF DISPENSING MULTI-COMPONENT MATERIAL FROM A CARTRIDGE

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[ EN ]

Sulzer Mixpac AG S14208PWO - To/Fk

Claims

1. A dynamic mixer (10) having two or more inlets (12) arranged at an inlet side (14) of the dynamic mixer (10) and an outlet (16) arranged at an outlet side (18) of the dynamic mixer (10), wherein the mixing element (20) of the dynamic mixer (10) is configured to be coupled via a coupling (24) to a drive shaft (22) to drive the mixing element (20) about a longitudinal axis (A) of the mixing element (20), wherein the mixing element (20) of the dynamic mixer (10) comprises a rotor body (26) and three, four or more rows of rotor blades (28, 30, 56, 86) arranged one after another and projecting radially from the rotor body (26) away from the longitudinal axis (A) between the ro tor body (26) and a housing (32) accommodating the dynamic mixer (10), wherein the rotor body (26) decreases in size from the inlets (12) towards the outlet (16) at least over 30% of a length of the rotor body (26), wherein the first of the three, four or more rows of rotor blades (28, 30, 56, 86) is ar ranged at a different axial position along the longitudinal axis (A) of the mix ing element (20) in comparison to the third of the three, four or more rows of rotor blades (28, 30, 56, 86), wherein three or more rows of stator blades (48', 50', 68, 88) are provided with a respective row of stator blades (48',

50', 68, 88) being arranged in alternating arrangement with said three, four or more rows of rotor blades (28, 30, 56, 86), wherein each of the inlets (12) is formed by a passage (42) having an inlet opening (44) and a mixer entry opening (46) formed, in particular directly, adjacent to the first row of rotor blades (28), wherein the respective inlet opening (44) is arranged in parallel to the mixer entry opening (46), and in parallel to an outlet opening (54) of the outlet (16).

2. A dynamic mixer (10) in accordance with claim 1 , wherein at least one row of the three, four or more rows of rotor blades (30, 56, 86) is arranged at the part of the rotor body (26) decreasing in size.

3. A dynamic mixer (10) in accordance with claim 1 or claim 2, wherein the rotor body (26) comprises a conical shaped part (26') arranged at a rear end (72) of the mixing element (20), wherein the third row of rotor blades (56) is arranged projecting from the conical shaped part (26').

4. A dynamic mixer (10) in accordance with at least one of the preceding

claims, wherein the rotor body (26) comprises a cylindrical shaped part (26") at its front end (70), with the first and second row of rotor blades (28, 30) projecting from the cylindrical shaped part (26").

5. A dynamic mixer (10) in accordance with claim 3 and claim 4, wherein three rows of rotor blades (28, 30, 56) are provided, with the first and second row of rotor blades (28, 30) comprising the same number of rotor blades (28', 30') and the third row of rotor blades (56) comprising less rotor blades (56') than either of the first and second rows of rotor blades (28, 30).

6. A dynamic mixer (10) in accordance with claim 5, wherein the first and sec ond rows of rotor blades (28, 30) each comprise between 10 and 20, pref erably 14 rotor blades (28', 30') and/or wherein the third row of rotor blades (56) comprises between 5 and 9, preferably 7 rotor blades (56').

7. A dynamic mixer (10) in accordance with one of the preceding claims,

wherein as many rows of stator blades (48', 50', 68, 88) are provided as rows of rotor blades (28, 30, 56, 86) are provided, with the alternating ar rangement starting at the inlets (12) starting with the first row of rotor blades (28) and with the final row of stator blades (88) being arranged closer to the outlet (16) than the final row of rotor blades (56, 86); and/or

wherein between three and ten, preferably between six and eight and espe cially seven, stator blades (48, 50, 68', 88') are arranged in each row of sta tor blades (48', 50', 68, 88); and/or

wherein less stator blades (48, 50, 68', 88') are provided than rotor blades (28', 30', 56', 86') or wherein an equal number of stator blades (48, 50, 68', 88') are provided as rotor blades (28', 30', 56', 86') are provided; and/or wherein the coupling (24) is formed at or in a part of the rotor body (26).

8. A dynamic mixer (10) in accordance with one of the preceding claims,

wherein four rows of rotor blades (28, 30, 56, 86) are provided with each row of rotor blades (28, 30, 56, 86) being arranged at a different axial posi tion along the longitudinal axis (A) of the mixing element (20) in comparison to the remaining row of rotor blades (28, 30, 56, 86).

9. A dynamic mixer (10) in accordance with claim 8, wherein two or three of the four rows of rotor blades (28, 30, 56) comprises the same number of ro tor blades (28', 30', 56').

10. A dynamic mixer (10) in accordance with at least one of the preceding

claims, wherein an axial gap along the longitudinal axis (A) between directly adjacent rotor blades (28', 30', 56', 86') and stator blades (48, 50, 68', 88') is selected in the range of 0.01 to 0.4 mm, and preferably is selected as 0.2 mm.

11. A dynamic mixer (10) in accordance with at least one of the preceding

claims, wherein a radial gap between an inner surface (52) of the housing (32) and one of the rotor blades (28', 30', 56', 86') respectively between one of the stator blades (48, 50, 68', 88') and the rotor body (26) is selected in the range of 0.01 to 0.4 mm, and preferably is selected as 0.2 mm.

12. A dynamic mixer (10) in accordance with one of the preceding claims,

wherein the cross-sectional size of the inlet (12) increases, in particular con tinuously increases, between the inlet opening (44) and the mixer entry opening (46).

13. A dynamic mixer (10) in accordance with one of the preceding claims,

wherein an area between two directly adjacent rotor blades (28') of the first row of rotor blades (28), the rotor body (26) and the housing (32) is an open area (58), and wherein the mixer entry opening (46) has a mixer inlet area (46'), with the mixer inlet area (46') being greater than the open area (58), optionally wherein the mixer inlet area (46') is less than twice the open area (58), optionally wherein the mixer inlet area (46') is larger than an inlet area (44') of the inlet opening (44).

14. A dispensing assembly (98) comprising a dispenser (100), a cartridge (102), optionally filed with a multi-component material (M, M'), received in the dis penser (100) and a dynamic mixer (10) in accordance with at least one of the preceding claims, wherein the dispenser (100) comprises the drive shaft (24) that can be coupled to the mixing element (20) of the dynamic mixer (10) to drive the mixing element (20) about a longitudinal axis (A) of the mix ing element (20) on dispensing said multi-component material (M, M') from said cartridge (102).

15. A method of dispensing multi-component material (M, M') from a cartridge using a dynamic mixer (10), optionally the dynamic mixer (10) in accord ance with one of the claims 1 to 13, the method comprising the steps of:

making available a respective component of a multi-component material (M, M') at the inlets (12) of the dynamic mixer (10);

guiding said respective component of said multi-component material (M, M') towards the mixing element (20) of the dynamic mixer (10) via said inlets (12) of the dynamic mixer (20) as a flow of material;

repeatedly interrupting said flow of material when this comes into contact with one of a stator blade (48, 50, 68', 88') and a rotor blade (28', 30', 56', 86') of the dynamic mixer (10) to bring about a rotation of the flow of materi al relative to the longitudinal axis (A) for mixing the multi-component materi-al (M, M'), with the flow of material being interrupted at least six times on its passage between the inlets (12) and the outlet (16).