A plastic fine grinding device and method

Abstract

This invention belongs to the field of precision machining technology and discloses a plastic fine grinding device and method. It includes a mounting base with an arc-shaped groove in the center of its upper surface. Discharge holes are symmetrically formed on both sides of the arc-shaped groove. Ring seats are fixedly fitted onto both sides of the curved surface of the arc-shaped groove, located inside the discharge holes. A shell is movably fitted onto the inner curved surface of the two ring seats. A gear sleeve is fixedly fitted onto the center of the outer curved surface of the shell. Connecting rings are fixedly fitted onto the left and right sides of the inner curved surface of the shell. Multiple vent holes are equidistantly formed on one side of the connecting ring's circumference. Cold air is introduced into the inner shell and the vent shell by a fan blade to rapidly cool the compressed, high-temperature plastic block, causing a large number of plastic particles to adhere tightly to each other. This solves the problem in existing grinding devices where the plastic particles roll with the grinding wheel, preventing the grinding wheel from effectively grinding the plastic particles.

Description

Technical Field

[0001] This invention belongs to the field of fine processing technology, specifically a plastic fine grinding device and method. Background Technology

[0002] In today's plastics processing and manufacturing industry, with the increasing awareness of environmental protection and the development of the circular economy, the recycling of waste plastics has become a focus of industry attention. However, converting waste plastics into high-quality plastic pellets or powders to meet the production needs of new products faces technological challenges.

[0003] In existing grinding devices, when grinding plastic granules, the spherical shape of the plastic granules causes the grinding disc to rotate when in contact with them, causing the plastic granules to roll. This results in the grinding disc not generating effective friction with the plastic granules, greatly reducing grinding efficiency. As a result, the grinding disc can hardly perform effective grinding and cutting operations on the plastic granules. In addition, existing grinding devices require the bottom surface of the material to be supported and clamped when grinding materials, which means that only one side of the material can be ground, resulting in low grinding efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a plastic fine grinding apparatus and method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a plastic fine grinding device, comprising a mounting base, an arc-shaped groove formed in the middle of the upper surface of the mounting base, and discharge holes symmetrically formed on the left and right sides of the arc-shaped groove. Ring seats are fixedly fitted onto the left and right sides of the curved surface of the arc-shaped groove, the ring seats being located inside the discharge holes. A housing is movably fitted onto the inner curved surfaces of the two ring seats. A gear sleeve is fixedly fitted onto the middle of the outer curved surface of the housing. Connecting rings are fixedly fitted onto the left and right sides of the inner curved surface of the housing. Multiple vent holes are equidistantly formed on one side of the connecting ring, and the middle of each of the multiple vent holes is fixed... The mounting base is fitted with a dustproof net. Inner shells are fixedly fitted onto the inner curved surfaces of both connecting rings. A ventilated shell is fixedly installed in the middle of the two inner shells. A ventilated sleeve is fixedly fitted onto the inner curved surface of the ventilated shell. Fan blades are fixedly fitted onto the outer curved surfaces of both inner shells near the connecting rings. Multiple heating plates are fixedly fitted at equal intervals onto the outer curved surfaces of both inner shells away from the connecting rings. A first driving component is fixedly installed on the front side of the middle of the upper surface of the mounting base. A first drive wheel is fixedly installed at the output end of the first driving component. The first drive wheel meshes with a gear sleeve. Grinding mechanisms are symmetrically arranged on the left and right sides of the upper surface of the mounting base.

[0006] Preferably, the grinding mechanism includes a second driving member, which is fixedly mounted on the upper surface of the mounting base. A second driving wheel is fixedly mounted on the output end of the second driving member. A shaft seat is fixedly sleeved on one side of the curved surface inside the arc groove. A telescopic shaft is movably sleeved on the middle of the shaft seat. A second passive toothed sleeve is fixedly sleeved on the outer curved surface of the telescopic shaft. The second passive toothed sleeve meshes with the second driving wheel. A grinding wheel is fixedly mounted on the telescopic end of the telescopic shaft. Multiple grinding grooves are equidistantly formed on the circumference of the grinding wheel away from the second driving member. A material passage groove is formed on one side of the grinding groove. The width of the material passage groove is smaller than the diameter of the plastic raw material particles, and the rotation of the left and right second driving members always remains opposite.

[0007] Preferably, the contact surface between the ring seat and the outer shell is a smooth surface, the outer shell is made of heat-insulating material, and the inner curved surface of the inner shell is a smooth surface.

[0008] Preferably, the ventilated shell is made of a rigid material, and the inner curved surface of the ventilated shell has multiple sets of air holes equidistantly spaced on its circumference. The ventilated sleeve is made of a breathable but waterproof material.

[0009] Preferably, the side circumference of the heating plate is provided with multiple guide grooves at equal intervals, and the guide grooves between two adjacent heating plates are staggered.

[0010] Preferably, a method for operating a plastic fine grinding device includes the following steps:

[0011] S1: First, start the right grinding mechanism in reverse to separate the right grinding wheel from the right inner shell. Then, pour the plastic particles to be ground into the inner shell and the vent shell. After that, start the right telescopic shaft in the forward direction to reconnect the right grinding wheel with the right inner shell.

[0012] S2: Start the electric heating plate and the first driving component, so that the air outside the fan drive connecting ring passes through the electric heating plate and is heated, then flows through the vent shell and vent sleeve into the interior of the inner shell and the vent shell, heating the plastic particles inside the inner shell and the vent shell, and melting the surface of the plastic particles.

[0013] S3: Stop the first drive unit and the heating plate and start the two telescopic shafts in the forward direction, so that the two grinding wheels come together and squeeze the plastic particles melted on the surface of the inner shell and the vent shell to form a high-temperature solid block. Then, only start the first drive unit to cool the high-temperature plastic solid block.

[0014] S4: The last two grinding mechanisms grind the cooled plastic block.

[0015] The working principle and beneficial effects of this invention are as follows:

[0016] 1. This invention activates the heating plate and the first driving component, causing air from outside the fan drive connecting ring to flow to the heating plate after being filtered through a dustproof net. The heated air then flows through the vent shell and vent sleeve into the inner shell and vent shell. This hot air heats the plastic particles inside the inner shell and vent shell, melting their surface. Simultaneously, the rotating inner shell and vent sleeve stir the plastic particles, ensuring more even heating. Afterward, the first driving component and heating plate are stopped, and the process is restarted in the forward direction. Two telescopic shafts drive two grinding wheels fixedly connected to them to come closer together, compressing the molten plastic particles on the surface of the inner shell and the vent shell to form a high-temperature solid block. Then, only the first drive component is activated to rotate the fan blades, which introduce cold air into the interior of the inner shell and the vent shell to rapidly cool the compressed high-temperature plastic block. At this time, a large number of plastic particles are tightly intertwined and adhered together, thus solving the problem that when existing grinding devices grind a large number of plastic particles, the plastic particles roll with the grinding wheels, causing the grinding wheels to be unable to grind the plastic particles.

[0017] 2. The invention activates a second driving component, whose output shaft drives a second active wheel to rotate. The active wheel drives a second passive gear sleeve to rotate, which in turn drives a telescopic shaft to rotate. The telescopic shaft then drives a grinding wheel to rotate. Since the rotation of the left and right second driving components is always opposite, the grinding wheels on the left and right sides rotate in opposite directions. Simultaneously, the two telescopic shafts are activated in the forward direction. The telescopic ends of the two shafts push the two rotating grinding wheels together to grind the adhered plastic granules. This allows the two grinding wheels to grind the plastic block simultaneously, improving grinding efficiency and enabling mass production. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the grinding and pressing mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram of the connecting ring structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the grinding wheel structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the breathable shell structure of the present invention.

[0024] In the diagram: 1. Mounting base; 101. Arc groove; 102. Discharge hole; 2. Ring seat; 3. Outer shell; 4. Gear sleeve; 5. Connecting ring; 501. Dustproof net; 6. Inner shell; 7. Ventilation shell; 701. Ventilation sleeve; 8. Fan blade; 9. Heating plate; 10. First driving component; 11. First driving wheel; 12. Grinding mechanism; 1201. Second driving component; 1202. Second driving wheel; 1203. Shaft seat; 1204. Telescopic shaft; 1205. Second passive gear sleeve; 1206. Grinding wheel; 1207. Grinding groove; 1208. Material passage groove. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1 to 5 As shown, this embodiment of the invention provides a plastic fine grinding device, including a mounting base 1. An arc-shaped groove 101 is formed in the middle of the upper surface of the mounting base 1. Discharge holes 102 are symmetrically formed on the left and right sides of the arc-shaped groove 101. Ring seats 2 are fixedly sleeved on both sides of the curved surface of the arc-shaped groove 101, located inside the discharge holes 102. A housing 3 is movably sleeved on the inner curved surfaces of the two ring seats 2. The contact surfaces between the ring seats 2 and the housing 3 are smooth, thereby reducing the frictional resistance between the housing 3 and the ring seats 2 when the outer curved surface of the housing 3 rotates along the inner curved surface of the ring seats 2. This reduces the load on the first driving member 10 when it drives the housing 3 to rotate via the first drive wheel 11 and the gear sleeve 4. While extending the service life of the first drive component 10, the energy consumption of the first drive component 10 is reduced. At the same time, the outer shell 3 is made of heat-insulating material and high carbon steel, thereby reducing the heat loss rate of the air outside the fan blade 8 drive connecting ring 5 after passing through the dustproof net 501 and being heated by the electric heating plate 9. The hot air heated by the electric heating plate 9 flows into the interior of the inner shell 6 and the vent sleeve 701 through the vent shell 7 and the vent sleeve 701. During the process of heating the plastic particles inside the inner shell 6 and the vent shell 7, the rate of heat loss of the air heated by the electric heating plate 9 between the outer shell 3, the inner shell 6 and the vent shell 7 through the outer shell 3 to the outside is reduced, thereby improving the melting efficiency of the plastic particles inside the inner shell 6 and the vent shell 7 and reducing power consumption.

[0027] A gear sleeve 4 is fixedly fitted to the middle of the outer curved surface of the outer shell 3. Connecting rings 5 ​​are fixedly fitted to the left and right sides of the inner curved surface of the outer shell 3. Multiple vent holes are equidistantly spaced on one side of each connecting ring 5. A dustproof mesh 501 is fixedly fitted to the center of each vent hole. By setting the dustproof mesh 501, dust from the outside air is prevented from entering between the outer shell 3, inner shell 6, and ventilated shell 7 when the fan blade 8 rotates. This prevents dust from adhering to the surface of the molten plastic granules, resulting in a decrease in the purity and quality of the subsequent plastic powder. The inner curved surfaces of the connecting ring 5 are all fixedly fitted with inner shells 6. The inner curved surfaces of the inner shells 6 are smooth, thus preventing molten plastic from sticking to the inner surface of the inner shells 6 and making it difficult to clean them later. A vent shell 7 is fixedly installed in the middle of the two inner shells 6. The vent shell 7 is made of a rigid material, specifically high-carbon steel, which improves the shape stability of the vent shell 7 and prevents deformation when supporting the vent sleeve 701, thereby improving the structural stability of the vent sleeve 701. Multiple sets of air vents are equidistantly spaced on the circumference of the inner curved surface of the vent shell 7. A ventilated sleeve 701 is fixedly fitted onto the inner curved surface of the ventilated shell 7. The ventilated sleeve 701 is made of a breathable but waterproof material, thereby achieving air permeability while reducing the diameter of the micropores on the surface of the ventilated sleeve 701, keeping the inner curved surface of the ventilated sleeve 701 smooth, and preventing molten plastic from adhering to the inner curved surface of the ventilated sleeve 701 and causing subsequent blockage of the ventilated sleeve 701. Fan blades 8 are fixedly fitted onto the outer curved surfaces of both inner shells 6 near the connecting ring 5, and fan blades 8 are fixedly fitted onto the outer curved surfaces of both inner shells 6 at equal intervals away from the connecting ring 5. Multiple heating plates 9 are provided, and multiple guide grooves are equidistantly opened on the side circumference of the heating plates 9. The guide grooves between two adjacent heating plates 9 are staggered to increase the contact area between the air and the heating plates 9 when the air flows through the multiple heating plates 9, thereby improving the air heating efficiency. A first driving member 10 is fixedly installed on the front side of the middle of the upper surface of the mounting base 1. A first driving wheel 11 is fixedly installed on the output end of the first driving member 10. The first driving wheel 11 meshes with the gear sleeve 4. A grinding mechanism 12 is symmetrically provided on the left and right sides of the upper surface of the mounting base 1.

[0028] The grinding mechanism 12 includes a second driving member 1201, which is fixedly mounted on the upper surface of the mounting base 1. A second driving wheel 1202 is fixedly mounted on the output end of the second driving member 1201. A bearing seat 1203 is fixedly sleeved on one side of the inner curved surface of the arc groove 101. A telescopic shaft 1204 is movably sleeved on the middle of the bearing seat 1203. A second passive gear sleeve 1205 is fixedly sleeved on the outer curved surface of the telescopic shaft 1204. The second passive gear sleeve 1205 meshes with the second driving wheel 1202. A grinding wheel 1206 is fixedly mounted on the telescopic end of the telescopic shaft 1204. The grinding wheel 1206 is located away from the second driving member 1201. Multiple grinding grooves 1207 are equidistantly arranged on one side of the circumference of component 1201. A material passage groove 1208 is provided on one side of the grinding groove 1207. The width of the material passage groove 1208 is smaller than the diameter of the plastic raw material particles. This prevents the plastic particles from leaking to the outside of the grinding wheel 1206 through the material passage groove 1208 when the grinding wheel 1206 compresses the plastic particles on the surface. At the same time, the air flowing into the outer shell 3, inner shell 6 and fan blade 8 and the ground plastic powder can flow out to the outside of the device through the material passage groove 1208, so that there is air flow and subsequent plastic powder collection. The rotation of the second drive component 1201 on the left and right sides always remains opposite.

[0029] The present invention also provides a method for operating a plastic fine grinding device, comprising the following steps:

[0030] S1: First, start the right grinding mechanism 12 in reverse so that the right grinding wheel 1206 is separated from the right inner shell 6. Then, pour the plastic particles to be ground into the inner shell 6 and the ventilated shell 7. Then, start the right telescopic shaft 1204 in the forward direction so that the right grinding wheel 1206 is re-fitted with the right inner shell 6.

[0031] S2: Start the electric heating plate 9 and the first driving component 10, so that the air outside the fan blade 8 drives the connecting ring 5 to pass through the electric heating plate 9 and be heated. Then, it flows into the inner shell 6 and the interior of the vent shell 7 through the vent shell 7 and the vent sleeve 701, heating the plastic particles inside the inner shell 6 and the vent shell 7, so that the surface of the plastic particles melts.

[0032] S3: Stop the first drive unit 10 and the heating plate 9 and start the two telescopic shafts 1204 in the forward direction, so that the two grinding wheels 1206 come closer to each other and squeeze the plastic particles melted on the surface of the inner shell 6 and the ventilated shell 7 to form a high-temperature solid block. Then, only the first drive unit 10 is started to cool the high-temperature plastic solid block.

[0033] S4: The last two grinding mechanisms 12 grind the cooled plastic solid block.

[0034] Working principle:

[0035] In use, the right telescopic shaft 1204 is first activated in reverse, causing its retractable end to retract. This retractable end of the right telescopic shaft 1204 drives the right grinding wheel 1206 to move to the right, separating it from the right inner shell 6. Then, the plastic particles to be ground are poured into the inner shell 6 and the ventilated shell 7. Next, the right telescopic shaft 1204 is activated in the forward direction, causing the right grinding wheel 1206 to re-engage with the right inner shell 6. Then, the heating plate 9 and the first driving component 10 are activated. The heating plate 9 generates heat when energized. The output shaft of the first driving component 10 drives the first drive wheel 11 to rotate. The first drive wheel 11 drives the outer shell 3 to rotate via the gear sleeve 4. The outer shell 3 drives the connecting ring 5 to rotate, which in turn drives the inner shell 6 to rotate. The inner shell 6 drives the fan blade 8 and the heating plate 9 to rotate. The fan blade 8 drives the air outside the connecting ring 5 to pass through the dust filter 501 and then be heated by the heating plate 9. The heated air... Hot air flows into the interior of the inner shell 6 and the ventilated shell 7 through the ventilated shell 7 and the ventilated sleeve 701. The hot air flowing into the interior of the inner shell 6 and the ventilated shell 7 heats the plastic particles inside the inner shell 6 and the ventilated shell 7, causing the surface of the plastic particles to melt. At the same time, the rotating inner shell 6 and the ventilated sleeve 701 stir the plastic particles inside the inner shell 6 and the ventilated shell 7, making the plastic particles inside the inner shell 6 and the ventilated shell 7 more evenly heated. Then, the first driving component 10 and the electric heating plate 9 are stopped and the two telescopic shafts 1204 are activated. The two telescopic shafts 1204 drive the two grinding wheels 1206 fixedly connected to them to move closer to each other, squeezing the plastic particles on the surface inside the inner shell 6 and the ventilated shell 7 to form a high-temperature solid block. This achieves the dense adhesion of a large number of plastic particles together, solving the problem that when the existing grinding wheel 1206 grinds a large number of plastic particles, the plastic particles roll with the grinding wheel 1206, causing the grinding wheel 1206 to be unable to grind the plastic particles.

[0036] Next, only the first drive unit 10 is activated, causing the fan blade 8 to rotate. The fan blade 8 guides cold air into the interior of the inner shell 6 and the vent shell 7 to rapidly cool the compressed, high-temperature plastic block. At this time, a large number of plastic particles are tightly interwoven and adhered together. Then, the second drive unit 1201 is activated. The output shaft of the second drive unit 1201 drives the second drive wheel 1202 to rotate. The second drive wheel 1202 drives the second driven gear sleeve 1205 to rotate. The second driven gear sleeve 1205 drives the telescopic shaft 1204 to rotate. The telescopic shaft 1204 drives the grinding wheel 1206 to rotate. At this time, due to the second drive unit 1206 on both sides... The rotation of the drive component 1201 is always reversed, causing the grinding wheels 1206 on the left and right sides to rotate in opposite directions. At the same time, the two telescopic shafts 1204 are activated in the forward direction. The telescopic ends of the two telescopic shafts 1204 push the two rotating grinding wheels 1206 to come closer together to grind the plastic granules that are stuck together. This allows the two grinding wheels 1206 to grind the plastic block at the same time, improving grinding efficiency and enabling mass production. In addition, the ground plastic powder flows into the recycling equipment through the grinding tank 1207, the feed trough 1208, the inner curved surface of the grinding wheel 1206, and the discharge hole 102.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic fine grinding device comprising a mounting base (1), characterized in that: The middle part of the upper surface of the mounting seat (1) is provided with an arc-shaped groove (101), and the left and right sides of the arc-shaped groove (101) are symmetrically provided with discharge holes (102); the left and right sides of the curved surface of the arc-shaped groove (101) are fixedly sleeved with ring seats (2), and the ring seats (2) are located on the inner side of the discharge holes (102); the inner curved surfaces of the two ring seats (2) are movably sleeved with an outer shell (3); the middle part of the outer curved surface of the outer shell (3) is fixedly sleeved with a gear sleeve (4); the left and right sides of the inner curved surface of the outer shell (3) are fixedly sleeved with connecting rings (5); a plurality of air holes are formed in the circumference of one side of the connecting ring (5) at equal intervals; the middle part of each of the plurality of air holes is fixedly sleeved with a dust screen (501); the inner curved surfaces of the two connecting rings (5) are fixedly sleeved with inner shells (6); the middle parts of the two inner shells (6) are fixedly installed with a breathable shell (7); the inner curved surface of the breathable shell (7) is fixedly sleeved with a breathable sleeve (701); the outer curved surfaces of the two inner shells (6) are fixedly sleeved with impeller blades (8) on the side close to the connecting ring (5); the outer curved surfaces of the two inner shells (6) are fixedly sleeved with a plurality of electric heating plates (9) on the side away from the connecting ring (5) at equal intervals; the front side of the middle part of the upper surface of the mounting seat (1) is fixedly installed with a first driving member (10); the output end of the first driving member (10) is fixedly installed with a first driving wheel (11); the first driving wheel (11) is in meshing engagement with the gear sleeve (4); and the left and right sides of the upper surface of the mounting seat (1) are symmetrically provided with grinding and pressing mechanisms (12). The grinding and pressing mechanism (12) comprises a second driving member (1201) which is fixedly installed on the upper surface of the mounting seat (1); the output end of the second driving member (1201) is fixedly installed with a second driving wheel (1202); one side of the inner curved surface of the arc-shaped groove (101) is fixedly sleeved with a shaft seat (1203); the middle part of the shaft seat (1203) is movably sleeved with an extension shaft (1204); the outer curved surface of the extension shaft (1204) is fixedly sleeved with a second driven gear sleeve (1205); the second driven gear sleeve (1205) is in meshing engagement with the second driving wheel (1202); the extension end of the extension shaft (1204) is fixedly installed with a grinding wheel (1206); a plurality of grinding grooves (1207) are formed in the circumference of the side of the grinding wheel (1206) away from the second driving member (1201) at equal intervals; one side of the grinding groove (1207) is provided with a material passing groove (1208); the width of the material passing groove (1208) is smaller than the diameter of the plastic raw material particles; and the rotation directions of the left and right sides of the second driving member (1201) are always opposite.

2. A plastic fine grinding device according to claim 1, characterized in that: The contact surface of the ring seat (2) and the outer shell (3) is a smooth surface; the outer shell (3) is made of heat insulation material; and the inner curved surface of the inner shell (6) is a smooth surface.

3. A plastic fine grinding device according to claim 2, characterized in that: The breathable shell (7) is made of hard material; a plurality of groups of air holes are formed in the inner curved surface of the breathable shell (7) at equal intervals; and the breathable sleeve (701) is made of breathable and water-proof material.

4. A plastic fine grinding device according to claim 3, characterized in that: The side circumference of the electric heating plate (9) is provided with a plurality of flow guide grooves equidistantly, and the flow guide grooves between two adjacent electric heating plates (9) are staggered.

5. A method of operating a plastic fine grinding device according to any one of claims 1-4, characterized in that, The method comprises the following steps: S1: first reverse start right side grinding mechanism (12), make right side grinding wheel (1206) and right side inner shell (6) separation, pour the plastic particles to be ground into the inner shell (6) and the inside of the air-permeable shell (7), then forward start right side telescopic shaft (1204), make right side grinding wheel (1206) reengage with right side inner shell (6); S2: start electric heating plate (9) and first driving element (10), make the air passing through the outer side of the driving connection ring (5) of the fan blade (8) heat through the electric heating plate (9), then flow into the inner shell (6) and the inside of the air-permeable shell (7) through the air-permeable shell (7) and the air-permeable sleeve (701), heat the plastic particles in the inner shell (6) and the air-permeable shell (7), and melt the surface of the plastic particles; S3: stop first driving element (10) and electric heating plate (9) and forward start two telescopic shafts (1204), make two grinding wheels (1206) close to each other, extrude the surface-melted plastic particles in the inner shell (6) and the air-permeable shell (7), form high-temperature solid block, then only start first driving element (10), cool the high-temperature plastic solid block; S4: finally two grinding mechanisms (12) grind the cooled plastic solid block.

Images