A fine spray powder grinding device

Abstract

The utility model belongs to powder processing equipment technical field, and disclose a kind of fine spraying powder grinding device, including grinding box, the bottom of grinding box is fixed with screening box, the inside symmetry of grinding box is rotatably connected with grinding roller, the inside is provided with screening mechanism, the inside of grinding box is provided with cleaning mechanism, the screening mechanism includes fixed frame hinged in the inside of screening box, the inside of fixed frame is installed with screen, the other end of fixed frame is symmetrically hinged with connecting arm;Drive cam by double-shaft motor, drive screen to vibrate continuously, compared with traditional stationary screening mode, different granularity powder can be separated more efficiently, avoid the mixing of qualified powder and unqualified particle, make the granularity of spraying powder after screening highly uniform, cleaning plate is driven under the double-shaft motor, reciprocate along the axial direction of grinding roller, and timely remove the powder on the surface of grinding roller.

Description

Technical Field

[0001] This utility model belongs to the field of powder processing equipment technology, specifically a fine spray powder grinding device. Background Technology

[0002] Paint, also known as varnish, is mainly used to decorate buildings and protect various building materials. Due to the different raw materials used in its production, there are many types of paint, one of which is powder coating. As the name suggests, this type of paint requires grinding equipment to crush the raw materials during its production. Currently, when grinding raw materials for coatings, the ground material is often poured out and then transferred to filtration and screening equipment for further processing. This not only increases the complexity of the operation process and extends the production cycle, but also may cause material loss and contamination due to multiple transfers. Moreover, existing grinding equipment cannot perform grinding and screening simultaneously, and cannot separate raw materials that meet the particle size requirements in a timely manner. This results in qualified raw materials being over-ground, causing energy waste and reducing overall production efficiency. Furthermore, during the grinding process, powdered raw materials adhere to the surface of the grinding roller due to electrostatic adsorption and adhesion, forming a raw material layer. This layer not only alters the working surface morphology of the grinding roller, affecting the contact and grinding effect between the raw material and the roller, but may also lead to uneven grinding of the raw material, resulting in a poor particle size distribution in the final product and impacting the performance and quality stability of the coating. As the deposits accumulate, they also increase the operating load on the equipment, shorten its service life, and increase maintenance costs.

[0003] Therefore, a fine powder grinding device is proposed to address the above problems. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a fine powder grinding device that can sieve the ground coating material with good sieving effect, and at the same time clean the grinding roller to ensure the grinding roller's performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fine spray powder grinding device, including a grinding box, a sieving box fixed at the bottom of the grinding box, grinding rollers symmetrically rotatably connected inside the grinding box, a sieving mechanism inside the grinding box, and a cleaning mechanism inside the grinding box; The screening mechanism includes a fixed frame hinged inside the screening box, a screen installed inside the fixed frame, a connecting arm symmetrically hinged to the other end of the fixed frame, a moving rod hinged to the other end of the connecting arm, and the top end of the moving rod penetrating inside the screening box and fixedly connected to a moving plate disposed on the upper side of the screening box. A spring is sleeved on the surface of the moving rod, and the two ends of the spring abut against the moving plate and the screening box respectively. A dual-axis motor is installed on the surface of the screening box, and a cam is fixed to the output end of the dual-axis motor, and the side of the cam abuts against the moving plate.

[0006] Preferably, bolt grooves are provided at both ends of the fixed frame, and the screen is installed inside the fixed frame by bolts.

[0007] Preferably, a discharge hopper is fixed on the side of the screening box near the bottom of the fixed frame.

[0008] Preferably, an inclined guide plate is fixedly connected to the bottom of the screening box.

[0009] Preferably, the cleaning mechanism includes a cleaning plate that slides symmetrically inside the grinding box near the grinding roller. A first slider is fixed to the side of the cleaning plate. A reciprocating screw is screwed into the inside of the first slider. One end of the reciprocating screw passes through the inside of the grinding box and is connected to a second synchronous pulley located on the outside of the grinding box. The other output end of the dual-axis motor is connected to the first synchronous pulley, and the first synchronous pulley and the second synchronous pulley are connected by a synchronous belt.

[0010] Preferably, a second slider is symmetrically fixedly connected to the side of the cleaning plate, and the second slider is slidably sleeved on the surface of the reciprocating lead screw.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting up a screening mechanism and driving the cam with a dual-axis motor to drive the screen to vibrate continuously, can more efficiently separate powders of different particle sizes compared with the traditional static screening method, avoiding the mixing of qualified powder and unqualified particles, and making the particle size of the spray powder after screening highly uniform.

[0012] 2. By setting up a cleaning mechanism, which operates synchronously with the grinding and screening processes, the cleaning plate moves back and forth along the grinding roller axis under the drive of a dual-axis motor, promptly removing the powder accumulated on the surface of the grinding roller, ensuring that the grinding roller always works in the best condition, avoiding the impact of powder accumulation on powder quality, extending the service life of the equipment, and ensuring the continuity and stability of the production process. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the grinding box in this utility model; Figure 3 This is a schematic diagram of the connecting arm and the moving rod in this utility model; Figure 4 This is a schematic diagram of the structure of the first slider and the cleaning plate in this utility model.

[0014] In the diagram: 1. Grinding box; 2. Screening box; 3. Screening mechanism; 31. Screen; 32. Fixed frame; 33. Connecting arm; 34. Moving rod; 35. Spring; 36. Moving plate; 37. Cam; 38. Dual-axis motor; 4. Cleaning mechanism; 41. First synchronous pulley; 42. Second synchronous pulley; 43. Reciprocating screw; 44. First slider; 45. Cleaning plate; 46. Second slider; 5. Discharge hopper; 6. Grinding roller; 7. Guide plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 4 As shown, this utility model provides a fine spray powder grinding device, including a grinding box 1, a sieving box 2 fixed at the bottom of the grinding box 1, a grinding roller 6 symmetrically rotatably connected inside the grinding box 1, a sieving mechanism 3 inside the sieving box 2, and a cleaning mechanism 4 inside the grinding box 1. The screening mechanism 3 includes a fixed frame 32 hinged inside the screening box 2. A screen 31 is installed inside the fixed frame 32. A connecting arm 33 is symmetrically hinged to the other end of the fixed frame 32. A moving rod 34 is hinged to the other end of the connecting arm 33. The top end of the moving rod 34 penetrates the interior of the screening box 2 and is fixedly connected to a moving plate 36 located on the upper side of the screening box 2. A spring 35 is sleeved on the surface of the moving rod 34, and the two ends of the spring 35 abut against the moving plate 36 and the screening box 2, respectively. A dual-shaft motor 38 is installed on the surface of the screening box 2. The output end of the dual-shaft motor 38 is fixedly mounted on the screen 2. A cam 37 is fixed, and the side of the cam 37 abuts against the moving plate 36. When the dual-axis motor 38 is started, the cam 37 is driven to make a circular motion. When the cam 37 rotates, the protruding part pushes the moving plate 36 to move downward. When the contact point between the cam 37 and the moving plate 36 changes, the moving plate 36 is driven to move upward under the elastic force of the spring 35. Then the moving plate 36 pulls one end of the fixed frame 32 to lift through the moving rod 34 and the connecting arm 33, so that the fixed frame 32 and the internal screen 31 are tilted. This is repeated, and the screen 31 continues to vibrate up and down, improving the sieving effect of powder.

[0017] It should be noted that a drive mechanism is provided on one side of the grinding box 1, which can drive the two sets of grinding rollers 6 to rotate relative to each other for crushing and grinding.

[0018] like Figures 1 to 4 As shown, bolt slots are provided at both ends of the fixed frame 32, and the screen 31 is installed inside the fixed frame 32 by bolts. The screen 31 can be disassembled by bolts, making it easy to replace the screen 31 with screens of different apertures and improve the screening range of the screening mechanism 3.

[0019] A discharge hopper 5 is fixed on one side of the surface of the screening box 2 near the bottom of the fixed frame 32, which can discharge the powder that has not passed the screening by the screen 31.

[0020] The bottom of the screening box 2 is fixedly connected to an inclined guide plate 7, which can guide the powder after screening.

[0021] like Figures 1 to 4As shown, the cleaning mechanism 4 includes a cleaning plate 45 that slides symmetrically inside the grinding box 1 near the grinding roller 6. A first slider 44 is fixed to the side of the cleaning plate 45. A reciprocating screw 43 is screwed into the inside of the first slider 44. One end of the reciprocating screw 43 passes through the inside of the grinding box 1 and is connected to a second synchronous wheel 42 located on the outside of the grinding box 1. The other output end of the dual-axis motor 38 is connected to the first synchronous wheel 41. The first synchronous wheel 41 and the second synchronous wheel 42 are connected by a synchronous belt. When the dual-axis motor 38 is working, the other output end drives the first synchronous wheel 41 to rotate. The power is transmitted to the second synchronous wheel 42 through the synchronous belt, which in turn drives the reciprocating screw 43 to rotate, driving the cleaning plate 45 to reciprocate linearly along the axis of the grinding roller 6 to clean the powder attached to one side of the grinding roller 6.

[0022] The cleaning plate 45 is symmetrically and fixedly connected to the side of the second slider 46, and the second slider 46 is slidably sleeved on the surface of the reciprocating screw 43. When the cleaning plate 45 moves back and forth, it will drive the second slider 46 to slide on the surface of the reciprocating screw 43, thereby improving the stability of the movement of the cleaning plate 45.

[0023] Working principle and process: After the material is put into the grinding box 1, the dual-shaft motor 38 is started to drive the cam 37 to make a circular motion. When the cam 37 rotates, the protruding part pushes the moving plate 36 to move downward. When the contact point between the cam 37 and the moving plate 36 changes, under the action of the elastic force of the spring 35, the moving plate 36 is driven to move upward. Then the moving plate 36 pulls one end of the fixed frame 32 to lift through the moving rod 34 and the connecting arm 33, so that the fixed frame 32 and the internal screen 31 are tilted. This is repeated, and the screen 31 continues to vibrate up and down. Larger particles of powder that do not pass through the screen 31 fall into the discharge hopper 5 along the screen 31. Fine powder that meets the particle size requirements passes through the mesh of the screen 31 and is guided out by the guide plate 7. When the dual-shaft motor 38 is working, the other output end drives the first synchronous wheel 41 to rotate. The power is transmitted to the second synchronous wheel 42 through the synchronous belt, which in turn drives the reciprocating screw 43 to rotate, driving the cleaning plate 45 to make a reciprocating linear motion along the axis of the grinding roller 6 to clean the powder attached to one side of the grinding roller 6.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fine powder grinding device, comprising a grinding box (1), wherein a sieve box (2) is fixed to the bottom end of the grinding box (1), and grinding rollers (6) are symmetrically rotatably connected inside the grinding box (1), characterized in that: The (2) is equipped with a screening mechanism (3), and the grinding box (1) is equipped with a cleaning mechanism (4). The screening mechanism (3) includes a fixed frame (32) hinged inside the screening box (2). A screen (31) is installed inside the fixed frame (32). A connecting arm (33) is symmetrically hinged to the other end of the fixed frame (32). A moving rod (34) is hinged to the other end of the connecting arm (33). The top end of the moving rod (34) penetrates the interior of the screening box (2) and is fixedly connected to a moving plate (36) on the upper side of the screening box (2). A spring (35) is sleeved on the surface of the moving rod (34). The two ends of the spring (35) abut against the moving plate (36) and the screening box (2) respectively. A dual-axis motor (38) is installed on the surface of the screening box (2). A cam (37) is fixed to the output end of the dual-axis motor (38). The side of the cam (37) abuts against the moving plate (36).

2. The fine powder grinding device according to claim 1, characterized in that: The fixed frame (32) has bolt grooves at both ends, and the screen (31) is installed inside the fixed frame (32) by bolts.

3. The fine powder grinding device according to claim 1, characterized in that: A discharge hopper (5) is fixed on the side of the screening box (2) near the bottom of the fixed frame (32).

4. The fine powder grinding device according to claim 1, characterized in that: The bottom of the screening box (2) is fixedly connected to a guide plate (7) that is set at an inclination.

5. The fine powder grinding device according to claim 1, characterized in that: The cleaning mechanism (4) includes a cleaning plate (45) that slides symmetrically inside the grinding box (1) near the grinding roller (6). A first slider (44) is fixed to the side of the cleaning plate (45). A reciprocating screw (43) is screwed into the inside of the first slider (44). One end of the reciprocating screw (43) passes through the inside of the grinding box (1) and is connected to a second synchronous wheel (42) located outside the grinding box (1). The other output end of the dual-axis motor (38) is connected to a first synchronous wheel (41). The first synchronous wheel (41) and the second synchronous wheel (42) are connected by a synchronous belt.

6. The fine powder grinding device according to claim 5, characterized in that: The cleaning plate (45) is symmetrically fixedly connected to a second slider (46), and the second slider (46) is slidably sleeved on the surface of the reciprocating lead screw (43).

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