A recycling and crushing all-in-one machine for thermosetting powder coarse powder

Abstract

This utility model belongs to the field of thermosetting powder production technology and discloses an integrated recycling and pulverizing machine for coarse thermosetting powder. It includes a pulverizing tank with several feed inlets and a discharge outlet at the bottom. A pulverizing roller is installed inside the pulverizing tank, with a hollow shaft passing through its center. A screen is installed below the pulverizing roller. A spreading plate is installed above the screen at the end of the hollow shaft. The spreading plate is hollow and has openings on its sides. A ventilation structure is located at the end of the hollow shaft away from the spreading plate. One end of the hollow shaft is connected to the spreading plate, and the other end is connected to the inlet of the ventilation structure. The outlet of the ventilation structure is connected to one of the feed inlets. A drive structure is connected to the end of the hollow shaft, which drives the pulverizing roller and the spreading plate to rotate via the hollow shaft. This utility model avoids situations where some powder particles do not meet production requirements due to insufficient pulverization cycles. The integrated design of recycling and pulverizing functions saves intermediate loading time and improves recycling and pulverizing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of thermosetting powder production technology, specifically to an integrated machine for recycling and pulverizing coarse thermosetting powder. Background Technology

[0002] Thermosetting powders are made from resin as the main raw material, and are produced through a series of steps including melt extrusion, cooling and pressing, crushing and grinding, and grading and screening. During the crushing and grinding process, a large amount of coarse powder is generated. In order to reduce production costs, this coarse powder needs to be recycled and crushed again.

[0003] To address the issue of coarse powder pulverization, a utility model patent with publication number CN210474124U discloses a coarse powder recovery device for thermosetting powder coatings. This device mainly includes a recovery tank body, a first crushing roller and a second crushing roller installed inside the recovery tank body, a driver connected to the ends of the two crushing rollers, and an inclined guide plate installed below the crushing rollers. The working principle is as follows: after the coarse powder waste enters the recovery tank body, it is first initially pulverized by the first crushing roller. The powder after initial pulverization is conveyed to the second crushing roller by the inclined guide plate, where it is further pulverized by the second crushing roller. The finer thermosetting powder formed after the two pulverizations falls into the collection trough for collection.

[0004] In existing technology, coarse powder needs to be recovered and then put into the recovery tank body for crushing. The recovery and crushing efficiency is low, and the particle size of the coarse powder is different. The two crushing processes cannot guarantee that the particle size of all powders meets the production requirements. Utility Model Content

[0005] To address this issue, this utility model provides an integrated recycling and pulverizing machine for thermosetting powder coarse powder, which solves the technical problems in the prior art where coarse powder is recycled and then put into the recycling tank body for pulverization, resulting in low recycling and pulverization efficiency, and the fact that the particle sizes of the coarse powder are different, making it impossible to ensure that the particle size of all powders meets the production requirements after two pulverization processes.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0007] A thermosetting powder coarse powder recycling and pulverizing integrated machine includes a pulverizing tank, the pulverizing tank is provided with a plurality of feed inlets, and the pulverizing tank is provided with a discharge outlet at the bottom;

[0008] The grinding tank is equipped with a grinding roller, a hollow shaft is inserted through the middle of the grinding roller, a screen is installed below the grinding roller, and a spreading plate is installed at the end of the hollow shaft above the screen.

[0009] The paving plate is hollow and has an opening on its side. The end of the hollow shaft away from the paving plate is provided with an exhaust structure. One end of the hollow shaft is connected to the paving plate, and the other end is connected to the inlet of the exhaust structure. The outlet of the exhaust structure is connected to one of the feed inlets.

[0010] The hollow shaft is connected to a drive structure at its end. The drive structure drives the crushing roller and the spreading plate to rotate through the hollow shaft. The crushing roller rotates and crushes the coarse powder that enters the crushing tank. The crushed coarse powder falls onto the screen and is then spread out by the spreading plate. Some powder passes through the screen and is discharged from the outlet. The coarse powder that does not pass through the screen is drawn back into the feed inlet by the suction force of the exhaust structure through the opening, the hollow shaft, and the exhaust structure.

[0011] Furthermore, an inverted conical screen plate is installed on the inner wall of the pulverizing tank, the inverted conical screen plate is disposed outside the pulverizing roller, and a number of grinding teeth are installed on the inverted conical screen plate.

[0012] Furthermore, the end of the hollow shaft away from the flat plate passes through the crushing tank, and the through end is connected to the drive structure;

[0013] The drive structure includes a driven gear sleeved on the end of the hollow shaft, a driving gear installed on the side of the driven gear, and a drive motor;

[0014] The driving gear meshes with the driven gear, and the driving gear is mounted on the drive end of the drive motor;

[0015] The drive motor drives the drive gear to rotate, and the drive gear drives the driven gear and the hollow shaft to rotate.

[0016] Furthermore, the exhaust structure includes an air inlet pipe, an air outlet pipe, and an exhaust fan connected to the end of the hollow shaft;

[0017] The end of the air inlet pipe away from the hollow shaft is connected to the exhaust fan, the air outlet pipe is connected to the exhaust fan outlet, and the end of the air outlet pipe away from the exhaust fan is connected to the feed inlet.

[0018] Furthermore, the end of the spreading plate away from the screen forms a downward sloping surface.

[0019] Furthermore, a storage compartment is formed at the bottom of the crushing tank, and the discharge port is located at the bottom of the storage compartment. A sealing cap is threaded onto the external part of the discharge port.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] In this invention, the coarse powder after crushing falls onto a screen for sieving. Powder that cannot pass through the screen is drawn into the crushing mechanism by the exhaust structure, where it is crushed again. The crushed powder then falls back onto the screen for sieving, and the process is repeated until all the coarse powder is crushed into fine powder particles that meet the requirements. This avoids some powder particles not meeting the production requirements due to insufficient crushing times. The integrated design of the recycling and crushing functions saves intermediate loading time and improves recycling and crushing efficiency.

[0022] Furthermore, the hollow shaft drives the crushing mechanism to crush coarse powder while simultaneously rotating the spreading plate to spread the powder on the screen. The spreading plate plays a role in stirring and clearing the powder, preventing powder that cannot pass through the screen from remaining at the bottom layer and causing the upper powder to be unable to be screened. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] Figure 1 A schematic diagram of the internal structure of an integrated recycling and pulverizing machine for thermosetting powders provided in this embodiment of the present invention;

[0025] Figure 2 A side view of a thermosetting powder coarse powder recycling and pulverizing integrated machine provided for an embodiment of this utility model;

[0026] Figure 3 A top view of a thermosetting powder coarse powder recycling and pulverizing integrated machine provided for an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the overall structure of the flatbed in the embodiment of this utility model.

[0028] The labels in the diagram represent the following:

[0029] 1. Crushing tank; 2. Feed inlet; 3. Discharge outlet; 4. Hollow shaft; 5. Screen; 6. Spreading plate; 7. Opening; 8. Crushing roller; 9. Inverted conical screen plate; 10. Grinding teeth; 11. Driven gear; 12. Drive gear; 13. Drive motor; 14. Air inlet pipe; 15. Air outlet pipe; 16. Exhaust fan; 17. Storage bin; 18. Sealing cover; 19. Vertical leg; 20. Bearing; 21. Mounting frame. Detailed Implementation

[0030] 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.

[0031] like Figure 1 , Figure 2 , Figure 4 As shown, this utility model provides an integrated machine for recycling and crushing thermosetting powder coarse powder, including a crushing tank 1, a plurality of feed inlets 2 on the crushing tank 1, and a discharge outlet 3 at the bottom of the crushing tank 1;

[0032] The crushing tank 1 is equipped with a crushing roller 8, a hollow shaft 4 is inserted through the middle of the crushing roller 8, a screen 5 is installed below the crushing roller 8, and a spreading plate 6 is installed above the screen 5 at the end of the hollow shaft 4.

[0033] The slab plate 6 is hollow and has an opening 7 on its side. The end of the hollow shaft 4 away from the slab plate 6 is provided with an exhaust structure. One end of the hollow shaft 4 is connected to the slab plate 6, and the other end is connected to the inlet of the exhaust structure. The outlet of the exhaust structure is connected to one of the feed inlets 2.

[0034] The hollow shaft 4 is connected to a drive structure at its end. The drive structure drives the crushing roller 8 and the spreading plate 6 to rotate through the hollow shaft 4. The crushing roller 8 rotates and crushes the coarse powder that enters the crushing tank 1. The crushed coarse powder falls onto the screen 5 and is then spread out by the spreading plate 6. Some of the powder passes through the screen 5 and is discharged from the outlet 3. The coarse powder that does not pass through the screen 5 is drawn back into the feed inlet 3 by the suction force of the exhaust structure through the opening 7, the hollow shaft 4, and the exhaust structure.

[0035] In this invention, the coarse powder after crushing falls onto screen 5 for sieving. Powder that cannot pass through screen 5 is drawn into the crushing mechanism by the exhaust structure, where it is crushed again. The crushed powder then falls back onto screen 5 for sieving, and the process is repeated until all the coarse powder is crushed into fine powder particles that meet the requirements. This avoids some powder particles not meeting the production requirements due to insufficient crushing times. The integrated design of the recycling and crushing functions saves intermediate loading time and improves recycling and crushing efficiency.

[0036] Furthermore, the hollow shaft 4 drives the crushing mechanism to crush coarse powder while simultaneously rotating the spreading plate 6 to spread the powder on the screen 5. The spreading plate 6 plays a role in stirring and clearing the powder, preventing powder that cannot pass through the screen 5 from remaining at the bottom layer and causing the upper powder to be unable to be screened.

[0037] An inverted conical screen plate 9 is installed on the inner wall of the crushing tank 1. The inverted conical screen plate 9 is set outside the crushing roller 8. Several grinding teeth 10 are installed on the inverted conical screen plate 9. After the coarse powder enters the crushing tank 1 from the feed inlet 2, it falls directly into the inverted conical screen plate 9. The crushing roller 8 rotates and grinds the coarse powder. In order to prevent the coarse powder from falling to the top of the crushing roller 8 after entering the crushing tank 1 from the feed inlet 2, the top of the crushing roller 8 is designed as an upward slope. The coarse powder falling on the slope slides down between the inverted conical screen plate 9 and the crushing roller 8 under the action of its own gravity and the centrifugal force generated when it rotates with the crushing roller 8.

[0038] The diameter of thermosetting powder is generally suitable between 10 and 70 micrometers. The design of the inverted conical screen plate 9 allows the powder to be directly dropped from the mesh on the inverted conical screen plate 9 when it is pulverized to a diameter between 10 and 70 micrometers, avoiding over-pulverization of the powder. Furthermore, after the powder falls from any mesh on the inverted conical screen plate 9, it will be distributed in various places on the screen 5, avoiding the accumulation of powder in local areas of the screen 5, thereby better sieving the powder.

[0039] The end of the hollow shaft 4 away from the flat plate 6 passes through the crushing tank 1, and the passing end is connected to the drive structure. The drive structure includes a driven gear 11 sleeved on the end of the hollow shaft 4, a driving gear 12 installed on the side of the driven gear 11, and a drive motor 13. The driving gear 12 meshes with the driven gear 11. The driving gear 12 is installed on the drive end of the drive motor 13. The drive motor 13 drives the driving gear 12 to rotate, and the driving gear 12 drives the driven gear 11 and the hollow shaft 4 to rotate.

[0040] The exhaust structure includes an inlet pipe 14, an outlet pipe 15, and an exhaust fan 16 connected to the ends of the hollow shaft 4. The end of the inlet pipe 14 furthest from the hollow shaft 4 is connected to the exhaust fan 16. The outlet pipe 15 is connected to the outlet of the exhaust fan 16, and the end of the outlet pipe 15 furthest from the exhaust fan 16 is connected to the feed inlet 2. After the initial crushing of the coarse powder, the exhaust fan 16 is turned on to suck up the powder that has not passed through the sieve 5. The powder enters the spreading plate 6 through the opening 7, then enters the hollow shaft 4, and then exits from the hollow shaft. 4. The air enters the air outlet pipe 15 and finally enters the crushing tank 1 again through the air outlet pipe 15. If the hollow shaft 4 is directly connected to the air inlet pipe 14, the rotation of the hollow shaft 4 will drive the air inlet pipe 14 to rotate. In order to prevent the hollow shaft 4 from driving the air inlet pipe 14 to rotate, a bearing 20 is installed at the end of the hollow shaft 4. The end of the bearing 20 away from the hollow shaft 4 is connected to the air inlet pipe 14. The hollow shaft 4 is connected to the air inlet pipe 14 through the bearing 20, so that the air inlet pipe 14 will not rotate when the hollow shaft 4 rotates.

[0041] like Figure 3As shown, the drive motor 13 and the exhaust fan 16 are both connected to the end of the hollow shaft 4 that passes through the crushing tank 1. Therefore, the drive motor 13 and the exhaust fan 16 are both installed on the crushing tank 1. In order to install the drive motor 13 and the exhaust fan 16 on the crushing tank 1 and connect them to the hollow shaft 4 at the same time, a mounting bracket 21 is installed on the crushing tank 1. The drive motor 13 and the exhaust fan 16 are both installed on the mounting bracket 21. The drive end of the drive motor 13 passes through the mounting bracket 21 and is connected to the drive gear 12. The air inlet pipe 14 passes through the mounting bracket 21 and is connected to the hollow shaft 4.

[0042] like Figure 4 As shown, the spreading plate 6 is located on the screen 5. By rotating and stirring, the pulverized powder is made to contact the screen 5, so that the screen 5 can screen all the pulverized powder. The pulverized powder falls from the inverted conical screen plate 9 onto the screen 5. During this process, some powder may fall onto the top of the spreading plate 6. In order to avoid powder remaining on the spreading plate 6, the end of the spreading plate 6 away from the screen 5 forms a downward slope. The powder falling onto the spreading plate 6 falls onto the screen 5 under the action of its own gravity and the centrifugal force generated by the rotation of the spreading plate 6.

[0043] The powder passing through the sieve 5 falls to the bottom of the grinding tank 1 for temporary storage. To facilitate the temporary storage of these qualified powders, a storage compartment 17 is formed at the bottom of the grinding tank 1. The powder passing through the sieve 5 is concentrated and temporarily stored in the storage compartment 17. The discharge port 3 is located at the bottom of the storage compartment 17. The discharge port 3 is threaded with a sealing cover 18. When it is necessary to collect the powder in the storage compartment 17, the sealing cover 18 can be rotated open.

[0044] The outer wall of the storage compartment 17 is equipped with several upright legs 19 in a rectangular array, and the crushing tank 1 stands stably on the ground by means of the upright legs 19.

[0045] When in use, thermosetting powder is loaded into the pulverizing tank 1 through the feed port 2, the drive motor 13 is turned on, the drive motor 13 drives the hollow shaft 4 to rotate, the hollow shaft 4 drives the pulverizing roller 8 and the spreading plate 6 to rotate, the pulverizing roller 8 pulverizes the thermosetting powder, the pulverized powder falls onto the screen 5, and the spreading plate 6 spreads the powder on the screen 5 evenly.

[0046] Turn on the exhaust fan 16. The exhaust fan 16 absorbs the powder that has not passed through the screen 5 into the air outlet pipe 15. The powder enters the grinding tank 1 again through the air outlet pipe 15. Turn off the exhaust fan 16 and turn on the drive motor 13 again to grind the powder. The ground powder falls back onto the screen 5 for sieving. The cycle continues until all the coarse powder is ground into powder particles that meet the production requirements.

[0047] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A combined recycling and pulverizing machine for thermosetting powders, characterized in that, It includes a crushing tank (1), which is provided with several feed inlets (2) and a discharge outlet (3) at the bottom of the crushing tank (1). The crushing tank (1) is equipped with a crushing roller (8), a hollow shaft (4) is inserted through the middle of the crushing roller (8), a screen (5) is installed below the crushing roller (8), and a spreading plate (6) is installed at the end of the hollow shaft (4) directly above the screen (5). The paving plate (6) is hollow and has an opening (7) on its side. The hollow shaft (4) has an exhaust structure at its end away from the paving plate (6). One end of the hollow shaft (4) is connected to the paving plate (6), and the other end is connected to the inlet of the exhaust structure. The outlet of the exhaust structure is connected to one of the feed inlets (2). The hollow shaft (4) is connected to a drive structure at its end. The drive structure drives the crushing roller (8) and the spreading plate (6) to rotate through the hollow shaft (4). The crushing roller (8) rotates and crushes the coarse powder that enters the crushing tank (1). The crushed coarse powder falls onto the screen (5) and is then spread out by the spreading plate (6). Some of the powder passes through the screen (5) and is discharged from the outlet (3). The coarse powder that does not pass through the screen (5) is drawn back into the feed inlet (2) by the suction force of the exhaust structure through the opening (7), the hollow shaft (4), and the exhaust structure.

2. The integrated recycling and pulverizing machine for thermosetting powder coarse powder according to claim 1, characterized in that, The inner wall of the crushing tank (1) is equipped with an inverted conical mesh plate (9), which is located outside the crushing roller (8). Several grinding teeth (10) are installed on the inverted conical mesh plate (9).

3. The integrated recycling and pulverizing machine for thermosetting powder coarse powder according to claim 1, characterized in that, The end of the hollow shaft (4) away from the flat plate (6) passes through the crushing tank (1), and the through end is connected to the drive structure; The drive structure includes a driven gear (11) sleeved on the end of the hollow shaft (4), a driving gear (12) installed on the side of the driven gear (11), and a drive motor (13). The driving gear (12) meshes with the driven gear (11), and the driving gear (12) is mounted on the driving end of the drive motor (13); The drive motor (13) drives the drive gear (12) to rotate, and the drive gear (12) drives the driven gear (11) and the hollow shaft (4) to rotate.

4. The integrated recycling and pulverizing machine for thermosetting powder coarse powder according to claim 1, characterized in that, The exhaust structure includes an air inlet pipe (14), an air outlet pipe (15), and an exhaust fan (16) connected to the end of the hollow shaft (4). The end of the air inlet pipe (14) away from the hollow shaft (4) is connected to the exhaust fan (16), the air outlet pipe (15) is connected to the air outlet of the exhaust fan (16), and the end of the air outlet pipe (15) away from the exhaust fan (16) is connected to the feed inlet (2).

5. The integrated recycling and pulverizing machine for thermosetting powder coarse powder according to claim 1, characterized in that, The end of the spreading plate (6) away from the screen (5) forms a downward slope.

6. The integrated recycling and pulverizing machine for thermosetting powder coarse powder according to claim 1, characterized in that, The bottom of the crushing tank (1) forms a storage compartment (17), and the discharge port (3) is located at the bottom of the storage compartment (17). The discharge port (3) is threaded with a sealing cap (18).

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