Sand mill for coating processing

Abstract

The utility model discloses a sand mill for coating processing, which comprises a sand mill cylinder, end covers are mounted at two ends of the sand mill cylinder, and an end cover is arranged on the end cover on one side. A cooling cavity and a primary grinding chamber are respectively arranged in the sand mill cylinder from outside to inside, a rotatable main shaft is arranged in the primary grinding chamber, a plurality of first grinding bulges are distributed on the surface of the main shaft, and the main shaft is driven by an external motor. The utility model relates to the technical field of sand mills, in particular to a sand mill for coating processing, by arranging an inner grinding chamber and an outer grinding chamber, compared with a traditional single grinding chamber, coating particles are firstly ground in a first-stage grinding chamber and then fed into a second-stage grinding chamber to be subjected to finer grinding, and the coating particles subjected to double grinding are uniform in particle size. And the particles are obviously finer, so that the requirement of superfine fine grinding is met.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mills, in particular to a sand mill used for coating processing. Background Art

[0002] Sand mill is the most adaptable, advanced and efficient grinding equipment. It is mainly used for grinding in coatings, inks, polymers, nanomaterials, food, printing and dyeing, pesticides, and other fields.

[0003] Specifically in the field of coating processing, especially in the grinding process of ultra-fine coatings, the mainstream sand mills on the market currently have unsatisfactory effects. This is mainly reflected in the limited grinding accuracy of the sand mill, which is difficult to meet the requirements. Secondly, when the particle size of the coating particles is smaller, due to the high temperature inside the sand mill, the coating particles are easy to stick to the inside of the sand mill, thus causing blockage. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a sand mill for coating processing, which solves the problems of low grinding precision and poor cooling effect of the prior sand mill.

[0006] (II) Technical solution

[0007] To achieve the above object, the utility model provides the following technical solution: a sand mill for coating processing, comprising a sand mill barrel, both ends of which are equipped with end covers, and an end cover is arranged on the end cover on one side.

[0008] A cooling chamber and a primary grinding chamber are arranged inside the sand mill barrel from outside to inside, wherein a rotatable main shaft is arranged in the primary grinding chamber, a plurality of first grinding protrusions are distributed on the surface of the main shaft, and the main shaft is driven by an external motor.

[0009] Wherein, the cooling cavity is respectively provided with a first water inlet and a first water outlet.

[0010] A secondary grinding chamber is arranged in the main shaft, and the main shaft is a hollow structure to facilitate the entry of the material after preliminary grinding into the secondary grinding chamber. An ultrafiltration screen and a grinding rod are arranged in the secondary grinding chamber, and the grinding rod is located outside the ultrafiltration screen.

[0011] A cooling water pipe is arranged inside the ultrafiltration screen cover. Two ends of the cooling water pipe are provided with a second water inlet and a second water outlet. The second water inlet and the second water outlet are located outside the end cover.

[0012] It also includes a feed pipe which is communicated with the barrel of the sand mill, and a feed port and a pressure gauge are respectively arranged on the feed pipe.

[0013] It further includes a discharge pipe communicated with the sand mill cylinder body, and a discharge port and a thermometer are respectively arranged on the discharge pipe.

[0014] As a further preference, a plurality of groups of second grinding protrusions are arranged on the inner wall of the first grinding chamber. The second grinding protrusions and the first grinding protrusions are distributed in a staggered manner. The second grinding protrusions are of a hollow structure, and the coolant in the cooling cavity can flow into the second grinding protrusions.

[0015] As a further preference, a trapezoidal diversion platform is arranged in the inner cavity of the main shaft, and a plurality of groups of third grinding protrusions are distributed on the trapezoidal diversion platform.

[0016] As a further preference, an air draft pipe is arranged on one side of the sand mill cylinder body, and the air draft pipe is communicated with an external air cooler.

[0017] As a further preference, inspection doors are arranged on both the first grinding chamber and the second grinding chamber.

[0018] (III) Beneficial effects

[0019] The utility model provides a sand mill for coating processing. It has the following beneficial effects:

[0020] For the sand mill for coating processing, by arranging inner and outer double grinding chambers, compared with the traditional single grinding chamber, coating particles are first ground in the first grinding chamber and then sent into the second grinding chamber for more refined grinding. After double grinding, the particle size of the coating particles is significantly finer, thus meeting the requirements of ultra-fine precision grinding. Further, by arranging inner and outer double cooling systems, it can ensure that the coating particles can be effectively cooled in both double grinding chambers. Secondly, since the coolant can be injected into the first grinding protrusions in the first grinding chamber, the contact area between the coating particles and the coolant is greatly increased, thereby improving the cooling efficiency and avoiding coating adhesion. Description of the drawings

[0021] Figure 1 It is a schematic structural diagram of the utility model.

[0022] In the figure: 1. Sand mill cylinder body; 2. End cover; 3. End shield; 4. Cooling cavity; 5. First grinding chamber; 6. Main shaft; 7. Motor; 8. First water inlet; 9. First water outlet; 10. First grinding protrusion; 11. Ultra filter screen cover; 12. Grinding rod; 13. Cooling water pipe; 14. Second water inlet; 15. Second water outlet; 16. Feed pipe; 17. Feed port; 18. Pressure gauge; 19. Discharge pipe; 20. Thermometer; 21. Discharge port; 22. Second grinding protrusion; 23. Third grinding protrusion; 24. Air draft pipe; 25. Air cooler; 26. Inspection door; 27. Second grinding chamber. Specific implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] As Figure 1 shown, the present utility model provides a technical solution: a sand mill for coating processing, including a sand mill cylinder body 1, end covers 2 are installed at both ends of the sand mill cylinder body 1, and an end cover 3 is provided on one of the end covers 2.

[0025] Inside the sand mill cylinder body 1, a cooling cavity 4 and a primary grinding chamber 5 are respectively arranged from the outside to the inside. Among them, a rotatable main shaft 6 is arranged in the primary grinding chamber 5, and a plurality of first grinding protrusions 10 are distributed on the surface of the main shaft 6, and the main shaft 6 is driven by an external motor 7.

[0026] Among them, a first water inlet 8 and a first water outlet 9 are respectively arranged on the cooling cavity 4, and the coolant enters from the first water inlet 8 and discharges from the first water outlet 9 to achieve the purpose of circulating liquid cooling.

[0027] Multiple groups of second grinding protrusions 22 are arranged on the inner wall of the primary grinding chamber 5. The second grinding protrusions 22 and the first grinding protrusions 10 are staggered. The second grinding protrusions 22 are of a hollow structure, and the coolant in the cooling cavity 4 can flow into the second grinding protrusions 22. The second grinding protrusions 22 can achieve the grinding purpose on the one hand and cool the coating on the other hand.

[0028] A secondary grinding chamber 27 is arranged inside the main shaft 6, and the main shaft 6 is of a hollow structure to facilitate the entry of the preliminarily ground material into the secondary grinding chamber 27. A super filter screen cover 11 and a grinding rod 12 are arranged in the secondary grinding chamber 27. The grinding rod 12 is located outside the super filter screen cover 11. We can embed a micro vibration motor at the tail of the super filter screen cover 11 to prevent the channels of the super filter screen cover 11 from being blocked by coating particles.

[0029] Maintenance doors 26 are provided on both the primary grinding chamber 5 and the secondary grinding chamber 27. The grinding beads in the primary grinding chamber 5 and the secondary grinding chamber 27 can be replaced through the maintenance doors 26.

[0030] A trapezoidal diversion platform is arranged in the inner cavity of the main shaft 6, and multiple groups of third grinding protrusions 23 are distributed on the trapezoidal diversion platform.

[0031] A cooling water pipe 13 is arranged inside the super filter screen cover 11. Both ends of the cooling water pipe 13 have a second water inlet 14 and a second water outlet 15, and the second water inlet 14 and the second water outlet 15 are located outside the end cover 2.

[0032] An air draft pipe 24 is provided on one side of the sand mill cylinder body 1. The air draft pipe 24 is communicated with an external air cooler 25. In order to further improve the cooling effect of the sand mill, the air cooler 25 is introduced to cool the high temperature inside the sand mill by using external cold air.

[0033] It also includes a feed pipe 16 communicated with the sand mill cylinder body 1. A feed inlet 17 and a pressure gauge 18 are respectively arranged on the feed pipe 16. The pressure gauge 18 can detect the pressure inside the sand mill cylinder body 1.

[0034] It also includes a discharge pipe 19 communicated with the sand mill cylinder body 1. A discharge outlet 21 and a thermometer 20 are respectively arranged on the discharge pipe 19. A negative pressure pumping pump can be connected at the position of the discharge outlet 21 to suck out the coating particles inside the ultrafiltration mesh cover 11. The thermometer 20 can detect the temperature inside the sand mill cylinder body 1.

[0035] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0036] During use, the coating particles enter through the feed inlet 17 and are sent into the primary grinding chamber 5 inside the sand mill cylinder body 1 through the feed pipe 16. The cooling liquid is respectively sent into the cooling cavity 4 and the cooling water pipe 13 through the first water inlet 8 and the second water inlet 14. The motor 7 is started to drive the main shaft 6 to rotate. The rotation of the main shaft 6 is used to break the coating particles. During the rotation process, the coating respectively impacts the first grinding protrusion 10 and the second grinding protrusion 22, thereby accelerating the fragmentation process of the coating particles.

[0037] The cooling liquid in the cooling cavity 4 cools the coating particles. At the same time, since the second grinding protrusion 22 contains cooling liquid, the cooling effect can be improved.

[0038] After the coating particles are initially ground and broken, they enter the secondary grinding chamber 27 through the hollow filter holes on the main shaft 6. Similarly, under the rotation of the main shaft 6, the coating particles are driven to impact the grinding beads and the grinding rod 12 in the secondary grinding chamber 27, thereby finely grinding the coating particles. And the cooling liquid in the cooling water pipe 13 cools and reduces the temperature of the coating particles. Finally, the coating particles are discharged from the discharge outlet 21 through the discharge pipe 19.

[0039] In summary, for the sand mill used in coating processing, by setting up an inner and outer double grinding chamber, compared with the traditional single grinding chamber, the coating particles are first ground in the primary grinding chamber and then sent into the secondary grinding chamber for more refined grinding. After being ground twice, the diameter of the coating particles is significantly finer, thus meeting the requirements of ultra-fine precision grinding. Further, by setting up an inner and outer double cooling system, it can ensure that the coating particles can be effectively cooled in both grinding chambers. Secondly, since the coolant can be injected into the first grinding protrusions in the primary grinding chamber, the contact area between the coating particles and the coolant is greatly increased, thereby improving the cooling efficiency and avoiding coating adhesion.

[0040] It should be noted that the electrical components mentioned in this article are all electrically connected to the external main controller and 220V or 380V mains. And the main controller can be a conventional known device such as a computer for control. Its control principle, internal structure, control switch mode, etc. are all conventional means of the existing technology and are directly cited here without further elaboration. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand mill for coating processing, characterized in that: The invention comprises a sand mill cylinder (1), both ends of which are provided with end covers (2), wherein an end cover (3) is provided on the end cover (2) on one side; A cooling chamber (4) and a primary grinding chamber (5) are respectively arranged inside the sand mill barrel (1) from the outside to the inside, wherein a rotatable main shaft (6) is arranged inside the primary grinding chamber (5), a plurality of first grinding protrusions (10) are distributed on the surface of the main shaft (6), and the main shaft (6) is driven by an external motor (7); Wherein, the cooling chamber (4) is respectively provided with a first water inlet (8) and a first water outlet (9); A secondary grinding chamber (27) is arranged in the main shaft (6), and the main shaft (6) is a hollow structure so that the material after preliminary grinding can enter the secondary grinding chamber (27). An ultrafiltration screen (11) and a grinding rod (12) are arranged in the secondary grinding chamber (27), and the grinding rod (12) is located outside the ultrafiltration screen (11); A cooling water pipe (13) is arranged inside the ultrafiltration screen cover (11), and two ends of the cooling water pipe (13) are provided with a second water inlet (14) and a second water outlet (15), and the second water inlet (14) and the second water outlet (15) are located outside the end cover (2); It also includes a feed pipe (16) connected to the sand mill barrel (1), and the feed pipe (16) is respectively provided with a feed port (17) and a pressure gauge (18); It also comprises a discharge pipe (19) which is in communication with the sand mill barrel (1), and a discharge port (21) and a thermometer (20) are respectively arranged on the discharge pipe (19).

2. The sand mill for coating processing according to claim 1, characterized in that: The inner wall of the primary grinding chamber (5) is provided with a plurality of groups of second grinding protrusions (22), the second grinding protrusions (22) and the first grinding protrusions (10) are arranged in an alternating manner, the second grinding protrusions (22) are hollow structures, and the cooling liquid in the cooling cavity (4) can flow into the second grinding protrusions (22).

3. A sand mill for coating processing according to claim 1, characterized in that: The inner cavity of the main shaft (6) is provided with a trapezoidal flow guide platform, on which a plurality of groups of third grinding protrusions (23) are distributed.

4. A sand mill for coating processing according to claim 1, characterized in that: An air duct (24) is provided on one side of the sand mill barrel (1), and the air duct (24) is connected to an external cooling fan (25).

5. A sand mill for coating processing according to claim 1, characterized in that: The primary grinding chamber (5) and the secondary grinding chamber (27) are both provided with inspection doors (26).

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