Powder grinding equipment

Abstract

The utility model relates to the technical field of grinding equipment, in particular to powder grinding equipment. The grinding time of powder can be prolonged, material tiling is avoided, and the grinding fineness and grinding efficiency of the powder are improved. Comprising a machine frame, an opening grinding cylinder installed on the machine frame, a vertical shaft rotationally installed in the middle of the opening grinding cylinder, a transverse shaft, compression rollers installed on the two sides of the transverse shaft, and a dispersing and chopping mechanism, a mounting base is fixedly installed at the top of the vertical shaft, and the transverse shaft is rotationally installed on the mounting base; the dispersing chopping mechanism comprises a chopping knife hinged to the mounting base, an elastic supporting piece and an annular rail fixedly mounted on the inner wall of the open grinding cylinder, the upper portion of the annular rail is a plane sliding way, the lower portion of the annular rail is a concave-convex rail, a notch corresponding to the annular rail is formed in the chopping knife, and a ball in close contact with the concave-convex rail is rotationally mounted on the inner bottom wall of the notch; a discharging port is formed in the side wall of the open grinding cylinder, and a motor for providing power for rotation of the vertical shaft is installed at the bottom of the machine frame.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a powder grinding equipment. Background Art

[0002] As we all know, powder grinding is a crucial step in the production process of paint, which can improve the fineness of raw materials: the original size of pigment and filler particles is usually large and uneven. The grinding process can crush and disperse these particles to the ideal particle size range, thereby obtaining a fine and uniform slurry. Finer particles help improve the hiding power, tinting power and transparency of the paint, while making the final coating surface smoother and flatter. It can also increase the complex force and adhesion: grinding helps the pigment particles to better combine with adhesives, solvents and other additives to form a stable suspension or dispersion system. This not only improves the stability of the paint itself, but also enhances the mechanical adhesion between the paint and the substrate, ensuring that the coating film is firmly attached to the coated object and reducing the risk of peeling and cracking.

[0003] For example, a Chinese utility model patent discloses a powder coating grinding and screening integrated machine (publication (announcement) number CN210449347U), which includes a housing; the housing is divided into a grinding chamber and a screening chamber; a grinding roller is arranged in the grinding chamber; a cylinder is arranged on the housing outside the grinding chamber, and the piston rod of the cylinder is connected to the grinding roller through a bracket; a grinding filter is arranged at the lower end of the grinding roller; a stirring roller is arranged in the screening chamber, and a screening filter is arranged at the lower end of the stirring roller; the aperture of the screening filter is smaller than the aperture of the grinding filter. It can effectively improve the grinding and screening efficiency, shorten the screening time, ensure the screening fineness, and can be applied to large-scale coating grinding and screening operations, and improve the production and processing efficiency of coatings.

[0004] However, when the inventors implemented this device, they found the following defects: the grinding roller rolls and grinds the powder at the grinding filter, which easily causes the powder to spread flat, and the powder is easy to fall from the grinding filter during the grinding process, resulting in incomplete grinding of the powder. The fineness of the powder grinding needs to be further improved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a powder grinding device which prolongs the grinding time of powder, avoids material spreading, and improves the grinding fineness and grinding efficiency of powder.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a powder grinding device, comprising a frame, an open grinding cylinder mounted on the frame, a vertical shaft rotatably mounted in the middle of the open grinding cylinder, a horizontal shaft, pressure rollers mounted on both sides of the horizontal shaft and a dispersed chopping mechanism, the top of the vertical shaft is fixedly mounted with a mounting seat, the horizontal shaft is rotatably mounted on the mounting seat, the dispersed chopping mechanism comprises a chopping knife hingedly mounted on the mounting seat, an elastic support member and a ring rail fixedly mounted on the inner wall of the open grinding cylinder, the upper part of the ring rail is a plane slideway, the lower part of the ring rail is a concave-convex track, and the chopping knife is provided with a chopping wheel that is aligned with the ring rail. A slot should be arranged, a ball bearing in close contact with the concave-convex track is rotatably installed on the bottom wall of the slot, the elastic support member is installed on the top wall of the slot, the bottom of the elastic support member is in close contact with the plane slideway, a discharge port is provided on the side wall of the open grinding cylinder, and a motor providing power for the vertical axis rotation is installed at the bottom of the frame; further, the pressure roller is arranged along the radial direction of the open grinding cylinder; under the elastic force of the elastic support member, the ball bearing is in elastic contact with the concave-convex track; the elastic support member can be a spring or a U-shaped spring sheet, etc.; a blocking plug plate is slidably installed at the discharge port of the open grinding cylinder.

[0007] As a preferred solution, the elastic support member includes a telescopic rod and a spring sleeved on the extended end of the telescopic rod, and the contact end of the telescopic rod with the ring rail is in the shape of a ball head.

[0008] As a preferred solution, it also includes an arc-shaped scraper, a cantilever support is installed on the mounting seat, and the arc-shaped scraper is installed on the cantilever support.

[0009] As a preferred solution, at least two groups of guide columns are installed on the arc-shaped scraper, and the guide columns are installed on the cantilever support for sliding up and down. The cantilever support is screwed with a tightening bolt for limiting the upward and downward movement of the guide columns.

[0010] As a preferred solution, a screen is provided at the discharge port.

[0011] As a preferred solution, a hollow cavity is provided in the pressure roller, and a through hole connected to the hollow cavity is provided on the transverse axis; further, the hollow cavity is filled with cooling liquid with a liquid level lower than that of the through hole.

[0012] As a preferred solution, the arc scraper is bent in the opposite direction of the rotation of the pressure roller in the open grinding cylinder; when the pressure roller rotates counterclockwise in the open grinding cylinder, the arc scraper is bent toward the clockwise side of the open grinding cylinder.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a powder grinding device with the following beneficial effects: the powder grinding device, by placing the powdered material into the bottom of an open grinding cylinder, the motor drives the vertical shaft to rotate, so that the pressure roller rolls and grinds the powdered material at the bottom of the open grinding cylinder; during the rolling and grinding process, the powdered material is spread flat on the bottom of the open grinding cylinder, and the chopping knife rotates synchronously with the vertical shaft; under the action of the elastic support, the ball bearings on the chopping knife roll along the concave and convex track at the bottom of the ring track, thereby prompting the chopping knife to rotate up and down around the hinge point on the mounting seat during rotation; the chopping knife cuts and crushes the spread powder at the bottom of the open grinding cylinder, and prompts the material to be further dispersed; the grinding time of the grinding roller on the powder can be controlled according to the grinding accuracy requirements of the powder; under the dispersing and cutting action of the chopping knife on the spread powder, the powder can be fully contacted with the pressure roller, thereby improving the grinding fineness and grinding efficiency of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0017] Figure 3 The utility model Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0018] Figure 4 The utility model Figure 2 Schematic diagram of the cross-section structure at BB in the middle;

[0019] Figure 5 The utility model Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0020] Figure 6 The utility model Figure 3 A schematic diagram of the partially enlarged structure at B in the middle;

[0021] Markings in the attached drawings: 1. frame; 2. open grinding cylinder; 3. vertical axis; 4. horizontal axis; 5. pressure roller; 6. mounting seat; 7. chopping knife; 8. ring rail; 9. ball bearing; 10. discharge port; 11. motor; 12. telescopic rod; 13. spring; 14. arc scraper; 15. cantilever support; 16. guide column; 17. tightening bolt; 18. screen; 19. hollow cavity; 20. through hole; 21. notch. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0023] As described in the background technology, in a powder coating grinding and screening integrated machine, the grinding roller rolls and grinds the powder at the grinding filter, which easily causes the powder to spread flat and the powder is easy to fall from the grinding filter during the grinding process, resulting in incomplete powder grinding. The fineness of the powder grinding needs to be further improved.

[0024] In order to solve this technical problem, the utility model provides a powder grinding device, which is used for powder grinding.

[0025] Specifically, please refer to Figure 1-6 The powder grinding equipment specifically includes: a frame 1, an open grinding cylinder 2 installed on the frame 1, a vertical shaft 3 rotatably installed in the middle of the open grinding cylinder 2, a horizontal shaft 4, a pressing roller 5 installed on both sides of the horizontal shaft 4, and a dispersed chopping mechanism, the top of the vertical shaft 3 is fixedly installed with a mounting seat 6, the horizontal shaft 4 is rotatably installed on the mounting seat 6, the dispersed chopping mechanism includes a chopping knife 7 hingedly installed on the mounting seat 6, an elastic support member and a ring rail 8 fixedly installed on the inner wall of the open grinding cylinder 2, the upper part of the ring rail 8 is a flat slideway, the lower part of the ring rail 8 is a concave-convex track, and the chopping knife 7 is provided with a notch 21 arranged corresponding to the ring rail 8. A ball 9 in close contact with the concave-convex track is rotatably installed on the inner bottom wall of the groove 21, an elastic support member is installed on the inner top wall of the groove 21, and the bottom of the elastic support member is in close contact with the flat slideway. A discharge port 10 is provided on the side wall of the open grinding cylinder 2, and an electric motor 11 providing power for the rotation of the vertical axis 3 is installed at the bottom of the frame 1; further, the pressure roller 5 is arranged along the radial direction of the open grinding cylinder 2; under the elastic force of the elastic support member, the ball 9 is in elastic contact with the concave-convex track; the elastic support member can be a spring or a U-shaped spring sheet, etc.; a blocking plug plate is slidably installed at the discharge port 10 of the open grinding cylinder 2.

[0026] The powder grinding equipment provided by the utility model puts the powder material into the bottom of the open grinding cylinder 2, and the motor 11 drives the vertical shaft 3 to rotate, so that the pressure roller 5 rolls and grinds the powder material at the bottom of the open grinding cylinder 2. During the rolling and grinding process, the powder material is spread on the bottom of the open grinding cylinder 2, and the chopping knife 7 rotates synchronously with the vertical shaft 3. Under the action of the elastic support, the ball 9 on the chopping knife 7 rolls along the concave and convex track at the bottom of the ring track 8, thereby prompting the chopping knife 7 to rotate up and down around the hinge point on the mounting seat 6 during the rotation process. The chopping knife 7 cuts and crushes the spread powder at the bottom of the open grinding cylinder 2 and promotes the material to be further dispersed. The grinding time of the grinding roller on the powder can be controlled according to the grinding accuracy requirements of the powder. Under the dispersing and cutting action of the chopping knife 7 on the spread powder, the powder can be fully contacted with the pressure roller 5, thereby improving the grinding fineness and grinding efficiency of the powder. The open grinding cylinder 2 adopts an open form, which can be beneficial to the heat dissipation of the pressure roller 5 and the powder, and avoids the situation that the pressure roller 5 adheres to the powder due to excessive heating due to friction during the grinding process.

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] Example 1

[0031] Please refer to Figure 1-3A powder grinding device, which includes a frame 1, an open grinding cylinder 2 installed on the frame 1, a vertical shaft 3 rotatably installed in the middle of the open grinding cylinder 2, a horizontal shaft 4, a pressing roller 5 installed on both sides of the horizontal shaft 4 and a dispersed chopping mechanism, the top of the vertical shaft 3 is fixedly installed with a mounting seat 6, the horizontal shaft 4 is rotatably installed on the mounting seat 6, the dispersed chopping mechanism includes a chopping knife 7 hingedly installed on the mounting seat 6, an elastic support member and a ring rail 8 fixedly installed on the inner wall of the open grinding cylinder 2, the upper part of the ring rail 8 is a flat slideway, the lower part of the ring rail 8 is a concave-convex track, and the chopping knife 7 is provided with a notch 2 arranged corresponding to the ring rail 8. 1, a ball 9 in close contact with the concave and convex track is rotatably mounted on the inner bottom wall of the notch 21, an elastic support is mounted on the inner top wall of the notch 21, the bottom of the elastic support is in close contact with the plane slideway, a discharge port 10 is arranged on the side wall of the open grinding cylinder 2, and a motor 11 for providing power for the rotation of the vertical shaft 3 is mounted at the bottom of the frame 1; the elastic support includes a telescopic rod 12 and a spring 13 sleeved on the extended end of the telescopic rod 12, and the contact end of the telescopic rod 12 with the ring rail 8 is in the shape of a ball head; it also includes an arc scraper 14, a cantilever support 15 is installed on the mounting seat 6, and the arc scraper 14 is installed on the cantilever support 15.

[0032] The powder grinding equipment provided in this embodiment can keep the ball 9 in good contact with the concave and convex track at the bottom of the ring rail 8 under the action of the telescopic rod 12 and the spring 13, thereby driving the chopping knife 7 to move back and forth, and the end of the telescopic rod 12 is in a ball head shape, which can reduce the friction between the telescopic rod 12 and the ring rail 8, thereby reducing the friction resistance of the chopping knife 7 rotating around the open grinding cylinder 2. The arc scraper 14 can evenly disperse and flatten the powder during the rotation process, and at the same time can push the powder to the side away from the center of the open grinding cylinder 2, so as to facilitate the discharge of the material from the discharge port 10 after the grinding is completed.

[0033] Example 2

[0034] The powder grinding equipment provided in Example 1 is further optimized, specifically, as Figure 2-3 As shown, at least two groups of guide columns 16 are installed on the arc scraper 14, and the guide columns 16 are installed on the cantilever support 15 for sliding up and down. The cantilever support 15 is screwed with a tightening bolt 17 for limiting the up and down movement of the guide columns 16; during the powder grinding process, a certain gap is left between the arc scraper 14 and the inner bottom wall of the open grinding cylinder 2. When the powder needs to be unloaded after the grinding is completed, the bottom of the arc scraper 14 is in close contact with the inner bottom wall of the open grinding cylinder 2.

[0035] The powder grinding equipment provided in this embodiment can adaptively adjust the powder paving thickness at the inner bottom wall of the open grinding cylinder 2 by adjusting the distance between the arc scraper 14 and the inner wall of the open grinding cylinder 2. When the ground powder needs to be discharged, the arc scraper 14 contacts the inner bottom wall of the open grinding cylinder 2. Under the action of the arc scraper 14, the ground material moves toward the outer circle of the open grinding cylinder 2 to improve the convenience of discharging the ground powder.

[0036] Specifically, a screen 18 is provided at the discharge port 10; the ground material can be screened through the screen 18, and powder with qualified particle size is discharged through the discharge port 10 after passing through the screen 18, while large particle powder is retained in the open grinding cylinder 2 for secondary grinding.

[0037] Specifically, a hollow cavity 19 is provided in the pressing roller 5, and a through hole 20 connected to the hollow cavity 19 is provided on the horizontal axis 4; further, the hollow cavity 19 is filled with a coolant whose liquid level is lower than the through hole 20; by adding coolant to the hollow pressing roller 5, the dead weight of the pressing roller 5 can be increased to improve the grinding effect of the powder, and the coolant can absorb the heat at the pressing roller 5, thereby reducing the temperature at the pressing roller 5, avoiding the phenomenon of the powder sticking to the roller due to the excessive temperature of the pressing roller 5; the coolant can be added or replaced through the through hole 20.

[0038] For details, please refer to Figure 2 The arc scraper 14 is bent in the opposite direction of the rotation of the pressure roller 5 in the open grinding cylinder 2; when the pressure roller 5 rotates counterclockwise in the open grinding cylinder 2, the arc scraper 14 is bent toward the clockwise side of the open screen cylinder; with the above arrangement, the arc scraper 14 can cause the powder to move toward the outer circle of the open grinding cylinder 2 when feeding the powder, so as to ensure that the powder in the open grinding cylinder 2 is smoothly discharged through the discharge port 10.

[0039] The use process of the powder grinding equipment provided by the utility model is as follows: by putting the powder material into the bottom of the open grinding cylinder 2, the motor 11 drives the vertical shaft 3 to rotate, so that the pressure roller 5 rolls and grinds the powder material at the bottom of the open grinding cylinder 2. During the rolling and grinding process, the powder material is spread flat on the bottom of the open grinding cylinder 2, and the chopping knife 7 rotates synchronously with the vertical shaft 3. Under the action of the elastic support, the ball 9 on the chopping knife 7 rolls along the concave and convex track at the bottom of the ring track 8, thereby prompting the chopping knife 7 to rotate up and down around the hinge point on the mounting seat 6 during the rotation process. The chopping knife 7 cuts and crushes the spread powder at the bottom of the open grinding cylinder 2 and promotes further dispersion of the material. When the powder is ground, the arc scraper 14 is adjusted so that the bottom of the arc scraper 14 contacts the inner bottom wall of the open grinding cylinder 2. The arc scraper 14 scrapes the ground powder to the discharge port 10 during the rotation process. The powder with qualified particle size is discharged after screening by the screen 18, and the unqualified powder is ground again.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A powder grinding device, characterized in that: The machine comprises a frame (1), an open grinding cylinder (2) mounted on the frame (1), a vertical shaft (3) rotatably mounted in the middle of the open grinding cylinder (2), a horizontal shaft (4), pressing rollers (5) mounted on both sides of the horizontal shaft (4), and a material dispersing and chopping mechanism, wherein a mounting seat (6) is fixedly mounted on the top of the vertical shaft (3), and the horizontal shaft (4) is rotatably mounted on the mounting seat (6); The dispersed chopping mechanism comprises a chopping knife (7) hingedly mounted on a mounting seat (6), an elastic support member and a ring rail (8) fixedly mounted on the inner wall of an open grinding cylinder (2); the upper portion of the ring rail (8) is a planar slideway, and the lower portion of the ring rail (8) is a concave-convex track; the chopping knife (7) is provided with a notch (21) arranged corresponding to the ring rail (8); a ball (9) in close contact with the concave-convex track is rotatably mounted on the inner bottom wall of the notch (21); the elastic support member is mounted on the inner top wall of the notch (21); the bottom of the elastic support member is in close contact with the planar slideway; a material discharge port (10) is provided on the side wall of the open grinding cylinder (2); and a motor (11) for providing power for the rotation of the vertical shaft (3) is mounted at the bottom of the frame (1).

2. The powder grinding equipment according to claim 1, characterized in that: The elastic support member comprises a telescopic rod (12) and a spring (13) sleeved on the extended end of the telescopic rod (12); the contact end of the telescopic rod (12) with the ring rail (8) is in the shape of a ball head.

3. The powder grinding equipment according to claim 2, characterized in that: It also comprises an arc-shaped scraper (14), a cantilever support (15) is installed on the mounting seat (6), and the arc-shaped scraper (14) is installed on the cantilever support (15).

4. The powder grinding equipment according to claim 3, characterized in that: At least two groups of guide columns (16) are installed on the arc scraper (14). The guide columns (16) are installed on the cantilever support (15) in a sliding manner. The cantilever support (15) is screwed with a tightening bolt (17) for limiting the upward and downward movement of the guide columns (16).

5. The powder grinding equipment according to claim 1, characterized in that: A screen (18) is provided at the discharge port (10).

6. The powder grinding equipment according to claim 1, characterized in that: The pressing roller (5) is provided with a hollow cavity (19), and the transverse shaft (4) is provided with a through hole (20) communicating with the hollow cavity (19).

7. The powder grinding equipment according to claim 3 or 4, characterized in that: The arc-shaped scraper (14) is bent in the opposite direction of the rotation of the pressure roller (5) in the open grinding cylinder (2).

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