A method for recycling elastomeric plastics

Abstract

The present invention relates to the technical field of plastic recycling, and discloses a method for recycling elastomeric plastics, including: S1. Classification: Classify the waste elastomeric plastics and remove impurities; S2. Crushing: Put them into a crusher for crushing treatment to obtain smaller particles. The invention is provided with a cross-cutting member and a connecting member. While the first crushing shaft rotates, it drives the positioning ring to rotate. The rotation of the positioning ring drives the slider to rotate. When the slider rotates, its vertical displacement slides on the inner wall of the positioning groove, and the horizontal displacement when the slider rotates drives the positioning frame to move horizontally. The positioning frame slides smoothly under the restriction of the limiting block and the channel. While the positioning frame moves, it drives the fixed plate to move, and the movement of the fixed plate drives the cutter to move. Therefore, when the first crushing shaft rotates to perform rotary cutting on the elastomeric plastics, the rotation of one side of the first crushing shaft drives the positioning frame to reciprocate once. The positioning frame drives the fixed plate and the cutter to move horizontally, and performs secondary correction cutting on the rotary-cut material.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic recycling, and particularly relates to a method for recycling elastomeric plastics. Background Art

[0002] Elastomeric plastics are a type of polymer material with unique properties, which simultaneously possess some characteristics of elastomers and plastics. In order to reduce the amount of landfill waste, reduce the harm to the ecological environment, improve resource utilization rate, and establish a complete industrial chain for recycling elastomeric plastics, the recycling of elastomeric plastics plays a crucial role in protecting the environment, saving resources, and promoting economic development.

[0003] Elastomeric plastics themselves have certain elasticity and flexibility. During the crushing process, under the extrusion and cutting effects of mechanical external forces, the broken particles are prone to squeezing and adhering to each other. At the same time, during crushing, there is mutual friction between the materials and between the materials and the components of the crushing equipment, which easily generates static electricity. Most elastomeric plastics are electrically insulating materials, and the generated static electricity is difficult to quickly conduct away, causing the broken particles to agglomerate due to electrostatic adsorption. The adhesion and agglomeration make the crushed material not present an ideal uniform particle state, which is not conducive to subsequent screening, conveying, and regranulation processes. For example, during granulation, if the input is agglomerated lump materials, it will cause uneven melting of the materials in the extruder, affecting the quality of the recycled plastic particles, resulting in quality problems such as uneven particle sizes and internal holes, thereby reducing the overall quality of the recycled products. Summary of the Invention

[0004] Technical Problems to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a method for recycling elastomeric plastics, which can effectively solve the problem of easy adhesion and agglomeration of elastomeric plastics during crushing in the prior art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0007] The present invention provides a method for recycling elastomeric plastics, including:

[0008] S1. Classification: Classify the waste elastomeric plastics and remove impurities;

[0009] S2. Crushing: Put it into a crusher for crushing treatment to obtain smaller particles;

[0010] S3. Melting: Put the crushed elastomeric plastic particles into a heating device to melt them at high temperature;

[0011] S4. Extrusion and Pelletizing: The molten elastomeric plastic is extruded into a strip shape through an extruder and then cut into pellets by a pelletizer;

[0012] S5. Cooling: The pelletized elastomeric plastic pellets are cooled to make them solidify;

[0013] S6. Packaging: The pellets are packaged for storage and transportation;

[0014] Among them, the crusher described in S2 includes a crushing chamber. Inside the crushing chamber, there is a crushing member that rotates to crush the elastomeric plastic. The crushing member includes a first crushing shaft that rotates forward and a second crushing shaft that rotates in the opposite direction. The first crushing shaft and the second crushing shaft are rotationally connected through a transmission group provided at one end of the first crushing shaft. A connecting member is sleeved outside the first crushing shaft, and a transverse cutting member is provided outside the connecting member. When the first crushing shaft and the second crushing shaft rotate to crush the elastomeric plastic to different degrees, the transverse cutting member makes a transverse reciprocating cut to re-cut the materials that adhere together between the first crushing shaft and the second crushing shaft;

[0015] Among them, a screening member for sorting and guiding the input elastomeric plastic is provided above the crushing chamber, and a sieve mesh is slidably connected to the bottom end of the side of the crushing chamber;

[0016] Positioning rings are sleeved at both ends of the first crushing shaft, and sliders are fixedly connected to the outside of the positioning rings. The sliders are movably connected to the connecting member;

[0017] The connecting member includes a positioning groove that slidably connects with the slider, and the positioning groove is embedded in the inner wall of the positioning frame;

[0018] The transverse cutting member includes a fixed plate fixedly connected to the positioning frame. A plurality of cutting knives are evenly provided at one end of the fixed plate. In the middle of the side of the cutting knife away from the crushing member, a fixed rod is fixedly connected. The top end of the fixed rod is slidably connected to a limiting groove opened at the top end inside the crushing chamber. A first flat gear is fixedly sleeved at a position near the port at the bottom end of the fixed rod. An bevel gear is rotatably connected to the bottom end of the fixed rod, and the bevel gear is embedded in a limiting groove opened at the bottom end of the inner wall of the crushing chamber. A second flat gear is meshed and connected to both sides of the first flat gear, and a third flat gear is fixedly connected to the bottom end of the second flat gear;

[0019] The movement of the cutting knife drives the movement of the fixed rod, and the movement of the fixed rod drives the movement of the first spur gear and the bevel gear. The bevel gear slides inside the limit groove. At this time, the cutting knife transversely cuts the material adhered to the mating piece with a gap until the bevel gear moves to the position meshing with the toothed plate. At this time, the bevel gear rotates while being restricted by the meshing force of the toothed plate and moves inside the limit groove. The rotation of the bevel gear drives the synchronous rotation of the third spur gear meshed with it. The rotation of the third spur gear drives the rotation of the second spur gear. The two second spur gears are placed at the same angle. Therefore, when one of the second spur gears is meshed with the first spur gear, the other second spur gear is not meshed with the first spur gear. The rotation of the second spur gear drives the rotation of the first spur gear meshed with it. The rotation of the first spur gear drives the rotation of the fixed rod. The rotation of the fixed rod drives the cutting knife to rotate under the restriction of the fixed plate. Then, as the bevel gear drives the third spur gear to rotate, the other second spur gear gradually rotates to the position meshing with the first spur gear. At this time, the other second spur gear rotates to drive the first spur gear to rotate in the reverse direction. The first spur gear drives the cutting knife to rotate in the reverse direction through the fixed rod. Therefore, during the second half of the cutting knife moving forward towards the crushing part and the first half of moving backward away from the crushing part, a swinging motion occurs. Thus, during the transverse cutting process, the fragments accumulated in the crushing chamber are also agitated to prevent the fragments from accumulating and blocking the connecting piece and the sieve mesh.

[0020] Further, the transmission group includes a first bevel gear fixedly connected to one end of a crushing shaft. The outer side of the first bevel gear is meshed with a second bevel gear. The outer side of the second bevel gear is meshed with a third bevel gear. The middle part of the second bevel gear close to the first bevel gear is fixedly connected to one end of a second crushing shaft. The other end of the first crushing shaft is fixedly connected to a motor.

[0021] Further, a limit block is slidably connected to the outer side of the positioning frame. The limit block is fixed to the side of the inner wall of the crushing chamber. Both ends of the positioning frame are slidably connected to the grooves opened on the inner wall of the crushing chamber.

[0022] Further, a toothed plate is fixedly connected to the inner wall of the limit groove opened at the bottom end of the crushing chamber. The toothed plate is located at a position close to the crushing part.

[0023] Further, the screening part includes a fixed frame fixedly connected to the top end of the positioning frame. A sieve is rotatably connected with damping inside the inner wall of the fixed frame. Sieve holes I and sieve holes II are evenly opened on the surface of the sieve. The sieve holes I and sieve holes II are symmetrically distributed with respect to the center line position of the sieve. A chute is opened on the inner wall of the sieve. A sub-plate is slidably connected to the inner wall of the chute. Blocks are evenly fixed on the upper surface of the sub-plate.

[0024] Furthermore, the screening element also includes a guide frame arranged below the fixed frame, one side of the guide frame is in contact with the inner wall of the crushing bin, the guide frame is a bent plate, and the guide frame is rotatably connected to the inner wall of the crushing bin through a rotating shaft passing through the bent portion, and a knob spring is provided on the outer side of the rotating shaft.

[0025] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0026] The present invention is provided with a cross-cutting piece and a connecting piece. When the crushing shaft rotates, it drives the positioning ring to rotate, and the rotation of the positioning ring drives the slider to rotate. When the slider rotates, the vertical displacement slides on the inner wall of the positioning groove, and the lateral displacement when the slider rotates drives the positioning frame to move horizontally. The positioning frame slides smoothly under the restriction of the limit block and the groove. When the positioning frame moves, it drives the fixed plate to move, and the movement of the fixed plate drives the cutter to move. Therefore, when the crushing shaft rotates to peel the elastomer plastic, the crushing shaft rotates on one side and drives the positioning frame to move back and forth once, and the positioning frame drives the fixed plate and the cutter to move horizontally. The cutter moves horizontally to cut the elastomer plastic accumulated and adhered between the blade gaps in another direction, avoiding the uneven cutting thickness caused by factors such as the elasticity of the material, the wear of the tool or the rotation speed of the single peeling. By adding a horizontal cutting direction, the peeled material can be corrected and cut for a second time to meet the product specification requirements, improve the dimensional accuracy of the product, and greatly improve the cutting efficiency.

[0027] The present invention is provided with a cross-cutting piece, and the movement of the cutter drives the movement of the fixed rod, and the movement of the fixed rod drives the flat gear 1 and the bevel gear to move, and the bevel gear slides inside the limiting groove, and at this time the cutter cuts the material adhered to the gap between the matching pieces horizontally until the bevel gear moves to a position meshing with the tooth plate, and at this time the bevel gear is restricted by the meshing force of the tooth plate and rotates while moving in the limiting groove, and the rotation of the bevel gear drives the flat gear 3 meshed with it to rotate synchronously, and the rotation of the flat gear 3 drives the flat gear 2 to rotate, and the two flat gears 2 are placed at the same angle, so when one of the flat gears 2 is meshed with the flat gear 1, the other flat gear 2 is not meshed with the flat gear 1, and the flat gear 2 The rotation drives the flat gear 1 meshing with it to rotate, and the rotation of the flat gear 1 drives the fixed rod to rotate. The rotation of the fixed rod drives the cutter to rotate under the restriction of the fixed plate. Then, as the bevel gear drives the flat gear 3 to rotate, the other flat gear 2 gradually rotates to a position meshing with the flat gear 1. At this time, the other flat gear 2 rotates to drive the flat gear 1 to rotate in the opposite direction. The flat gear 1 drives the cutter to rotate in the opposite direction through the fixed rod. Therefore, in the second half of the process of the cutter moving forward toward the crushing part and the front half of the process of moving backward away from the crushing part, a swinging motion occurs. Therefore, in the process of horizontal cutting, the fragments gathered in the crushing bin are also stirred to prevent the fragments from clogging the connecting parts and the screen.

[0028] The present invention is provided with a transmission group. When the motor rotates, it drives the main shaft of the first crushing shaft to rotate. The rotation of the first crushing shaft drives the first bevel gear to rotate. The rotation of the first bevel gear drives two symmetrically arranged second bevel gears to rotate on the inner wall of the crushing chamber. The second bevel gear transmits force smoothly to the third bevel gear. The third bevel gear rotates in the reverse direction under the force. The rotation of the third bevel gear drives the main shaft of the second crushing shaft to rotate in the reverse direction. The blades of the first crushing shaft and the second crushing shaft rotate in the reverse direction, solving the situation that when a cutting tool acts on an elastomeric plastic, the elastomeric plastic can absorb the energy during cutting due to its own elasticity and flexibility. First, it will undergo elastic deformation. If the cutting energy does not exceed the fracture toughness of the material, the material will not break but will return to its original state after the cutting tool is removed. Through the blades in two rotation directions, when the blades cut the elastomeric plastic, the elastomeric plastic will also be stretched, making the elastomeric plastic straightened when the blade acts on the material, thus improving the cutting efficiency.

[0029] The present invention sets up a fixed frame composed of a positioning frame and a cutting knife. When one side cutting knife moves towards the crushing part, the other side cutting knife moves away from the crushing part. The gap size between the first crushing shaft and the cutting knife is constantly changing dynamically, which can effectively squeeze and loosen the materials in the crushing chamber space, effectively avoid the material blockage during the crushing process caused by the unchanged space size, and can also push the materials at the corner positions to the cutting area, improving the cutting efficiency.

[0030] The present invention is provided with a screening part. When the materials are initially put in, the fixed frame is flush with the screen. The fixed frame reciprocates with the positioning frame, which can vibrate and screen the input materials. The small-volume materials on the left are crushed and cut by the blades of the second crushing shaft and fall into the crushing chamber through the second screen holes. The materials that first fall on the surface of the guiding frame slide down from the surface of the guiding frame to the left crushing area of the crushing chamber. When entering the middle process of the material feeding, the fixed shaft of the screen starts to rotate. The fixed shaft first rotates clockwise, and the fixed shaft drives the screen to rotate. The large-volume elastomeric plastics remaining on the upper surface of the screen fall into the right side of the inner wall of the crushing chamber through the second screen holes under the action of gravity. The small-volume materials on the right are crushed and cut by the blades of the first crushing shaft, and the falling materials slide down from the surface of the guiding frame to the right crushing area of the crushing chamber under the guiding action of the guiding frame surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic process flow diagram of an embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the overall structure of the crushing bin according to an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the separated structure of the crushing bin and the screening member according to an embodiment of the present invention;

[0035] Figure 4 Schematic diagram of the separated structure of the screening member according to an embodiment of the present invention;

[0036] Figure 5 Schematic diagram of the connection state of the connecting member and the cross-cutting member according to an embodiment of the present invention;

[0037] Figure 6 Schematic diagram of the separated structure inside the crushing bin according to an embodiment of the present invention;

[0038] Figure 7 Schematic diagram of the structure of the crushing member according to an embodiment of the present invention;

[0039] Figure 8 Schematic diagram of the structure of the cross-cutting member according to an embodiment of the present invention;

[0040] Figure 9 Schematic diagram of the structure of the screen filter according to an embodiment of the present invention.

[0041] The reference numerals in the figure respectively represent: 1, crushing bin; 11, channel; 12, limiting block; 13, limiting groove; 14, toothed plate; 2, crushing member; 21, first crushing shaft; 22, second crushing shaft; 24, transmission group; 241, first bevel gear; 242, second bevel gear; 243, third bevel gear; 25, positioning ring; 251, slider; 26, motor; 3, cross-cutting member; 31, cutter; 32, fixing plate; 33, fixing rod; 34, first spur gear; 35, bevel gear; 36, second spur gear; 37, third spur gear; 4, connecting member; 41, positioning frame; 42, positioning groove; 5, screening member; 51, fixing frame; 52, screen; 521, chute; 53, first screen hole; 54, second screen hole; 55, sub-plate; 551, stop block; 56, guiding frame; 6, screen filter. Detailed implementation manners

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0043] The present invention will be further described below in conjunction with the embodiments.

[0044] Example:

[0045] Please refer to Figures 1-9 , the present invention provides a technical solution for a method of recycling elastomeric plastics, including the following steps:

[0046] S1. Classification: Classify the waste elastomeric plastics and remove impurities;

[0047] S2. Crushing: Put it into a crusher for crushing treatment to obtain smaller particles;

[0048] S3. Melting: Put the crushed elastomeric plastic particles into a heating device to melt them at high temperature;

[0049] S4. Extrusion and pelletizing: Extrude the melted elastomeric plastic into a strip shape through an extruder, and then cut it into granular form through a pelletizer;

[0050] S5. Cooling: Cool the pelletized elastomeric plastic particles to solidify them;

[0051] S6. Packaging: Package the particles for storage and transportation;

[0052] The crusher mentioned in S2 includes a crushing chamber 1. Refer to Figure 2 , inside the crushing chamber 1, there is a crushing member 2 for crushing. Refer to Figure 6 and Figure 7 , the crushing member 2 includes a motor 26 fixedly connected to the inner wall of the crushing chamber 1. The output end of the motor 26 is fixedly connected to a first crushing shaft 21. The other end of the first crushing shaft 21 is provided with a transmission group 24. The transmission group 24 includes a first bevel gear 241 fixedly connected to one end of the first crushing shaft 21. There are two second bevel gears 242 meshed on the outside of the first bevel gear 241 and symmetrically arranged with the first bevel gear 241 as the center. The other side of the two second bevel gears 242 is meshed with a third bevel gear 243. The outside of the third bevel gear 243 is rotatably connected to the inner wall of the crushing chamber 1. One side of the third bevel gear 243 close to the first bevel gear 241 is fixedly connected to one end of a second crushing shaft 22. Both the first crushing shaft 21 and the second crushing shaft 22 are composed of a main shaft and blades. The main shaft of the second crushing shaft 22 is rotatably connected to the inner side of the main shaft of the first crushing shaft 21. The main shaft of the first crushing shaft 21 is fixedly connected to the side of the first bevel gear 241 away from the third bevel gear 243. And the diameter size of the first crushing shaft 21 is larger than the diameter size of the second crushing shaft 22. The gaps between the blades of the first crushing shaft 21 and the blades of the second crushing shaft 22 are equal.

[0053] After the elastomeric plastic enters the inner wall of the crushing chamber 1, the motor 26 rotates, driving the main shaft of the crushing shaft 1 21 to rotate. The rotation of the crushing shaft 1 21 drives the rotation of the bevel gear 1 241. The rotation of the bevel gear 1 241 drives the two symmetrically arranged bevel gears 2 242 to rotate on the inner wall of the crushing chamber 1. The bevel gears 2 242 smoothly transmit force to the bevel gear 3 243. The bevel gear 3 243 rotates in the opposite direction under the force. The rotation of the bevel gear 3 243 drives the main shaft of the crushing shaft 2 22 to rotate in the opposite direction. The blades of the crushing shaft 1 21 and crushing shaft 2 22 rotate in the opposite direction. This solves the problem that when the cutting tool acts on the elastomeric plastic, the elastomeric plastic can absorb the energy of the cutting due to its own elasticity and flexibility. It will first undergo elastic deformation. If the cutting energy does not exceed the fracture toughness of the material, the material will not break, but will return to its original shape after the cutting tool is removed. The blades rotating in two directions also stretch the elastomeric plastic when the blades cut it, so that the elastomeric plastic is already stretched when the blades act on the material, thereby improving cutting efficiency.

[0054] refer to Figure 3 、 Figure 5 and Figure 6 , both ends are fixed with a positioning ring 25, the outer side of the positioning ring 25 is fixedly connected with a slider 251, the slider 251 is set as an I-wheel, the slider 251 is embedded in the inner side of the positioning groove 42 opened in the middle of the positioning frame 41, the positioning ring 25 rotates to drive the slider 251 to rotate, and the slider 251 slides vertically inside the positioning groove 42, the cross-cutting member 3 includes a cutter 31 located at the gap between the blades of the crushing shaft 1 21 and the crushing shaft 2 22, the cutter 31 is set as a plurality, and a fixing plate is provided at the upper and lower ends of the plurality of cutters 31 32, the width of the cutter 31 is smaller than the gap between the blades of the crushing shaft 1 21 and the crushing shaft 2 22, and the side of the cutter 31 away from the crushing piece 2 is fixedly connected to a fixing rod 33. The cutter 31 rotates around the fixing rod 33 under the restriction of the fixing plate 32. Both sides of the fixing plate 32 are fixedly connected to one side of the positioning frame 41. The outer portion of the positioning frame 41 is slidably connected to the limit block 12 fixedly connected to the inner wall of the crushing bin 1. The upper and lower ends of the inner wall of the crushing bin 1 are provided with grooves 11, and the grooves 11 are slidably connected to the upper and lower ends of the positioning frame 41;

[0055] While the first crushing shaft 21 rotates, it drives the positioning ring 25 to rotate. The rotation of the positioning ring 25 drives the slider 251 to rotate. When the slider 251 rotates, its vertical displacement slides on the inner wall of the positioning groove 42, and the horizontal displacement during the rotation of the slider 251 drives the positioning frame 41 to move horizontally. The positioning frame 41 slides smoothly under the restriction of the limiting block 12 and the channel 11. When the positioning frame 41 moves, it drives the fixed plate 32 to move, and the movement of the fixed plate 32 drives the cutting knife 31 to move. Therefore, when the first crushing shaft 21 rotates to perform rotary cutting on the elastomeric plastic, the rotation of the first crushing shaft 21 on one side drives the positioning frame 41 to reciprocate once. The positioning frame 41 drives the fixed plate 32 and the cutting knife 31 to move horizontally, and the horizontal movement of the cutting knife 31 cuts the elastomeric plastic accumulated and adhered between the blade gaps in another direction, avoiding the uneven cutting thickness caused by factors such as the elasticity of the material, tool wear, or rotation speed in single rotary cutting. By adding a horizontal cutting direction, the material after rotary cutting can be subjected to secondary correction cutting to make it meet the product specification requirements, improving the dimensional accuracy of the product and greatly enhancing the cutting efficiency.

[0056] Reference Figure 4 、 Figure 5 and Figure 8 , the top end of the fixing rod 33 is slidably connected to the limiting groove 13 opened at the top end of the crushing chamber 1. A first spur gear 34 is fixedly sleeved at a position near the bottom end of the lower part of the fixing rod 33. The bottom end of the fixing rod 33 is rotatably connected to a bevel gear 35. The bevel gear 35 is located inside the limiting groove 13 opened at the bottom end of the crushing chamber 1. A positioning plate is fixedly connected to the outer circumferential surface of the fixing rod 33 at the bottom end of the bevel gear 35. The top end of the positioning plate is rotatably connected to a third spur gear 37. The third spur gear 37 is meshed with the bevel gear 35. A second spur gear 36 is fixedly connected to the top end of the third spur gear 37. The second spur gear 36 is flush with the first spur gear 34 and is meshed with the outer side of the first spur gear 34. A toothed plate 14 is fixedly connected to the inner wall of the limiting groove 13 opened at the bottom end of the crushing chamber 1. The toothed plate 14 is located at a position on the inner wall of the limiting groove 13 close to the crushing part 2. The size of the inner wall of the limiting groove 13 far from the crushing part 2 is slightly larger than the size of the bevel gear 35;

[0057] The movement of the cutting knife 31 drives the movement of the fixed rod 33. The movement of the fixed rod 33 drives the movement of the first spur gear 34 and the bevel gear 35. The bevel gear 35 slides inside the limiting groove 13. At this time, the cutting knife 31 transversely cuts the material with an adhesive gap between the mating pieces until the bevel gear 35 moves to the position meshing with the toothed plate 14. At this time, the bevel gear 35 is restricted by the meshing force of the toothed plate 14 and rotates while moving inside the limiting groove 13. The rotation of the bevel gear 35 drives the synchronous rotation of the third spur gear 37 meshing with it. The rotation of the third spur gear 37 drives the rotation of the second spur gear 36. The two second spur gears 36 are placed at the same angle. Therefore, when one of the second spur gears 36 meshes with the first spur gear 34, the other second spur gear 36 does not mesh with the first spur gear 34. The rotation of the second spur gear 36 drives the rotation of the first spur gear 34 meshing with it. The rotation of the first spur gear 34 drives the rotation of the fixed rod 33. The rotation of the fixed rod 33 drives the rotation of the cutting knife 31 under the restriction of the fixed plate 32. Then, as the bevel gear 35 drives the rotation of the third spur gear 37, the other second spur gear 36 gradually rotates to the position meshing with the first spur gear 34. At this time, the other second spur gear 36 drives the first spur gear 34 to rotate in the reverse direction. The first spur gear 34 drives the cutting knife 31 to rotate in the reverse direction through the fixed rod 33. Therefore, during the second half of the forward movement of the cutting knife 31 towards the crushing member 2 and the first half of the backward movement away from the crushing member 2, a swinging motion occurs. Thus, during the transverse cutting process, the fragments accumulated in the crushing chamber 1 are also agitated to prevent the fragments from accumulating and blocking the connecting member 4 and the sieve mesh 6.

[0058] At the same time, the fixed frame composed of the positioning frame 41 and the cutting knife 31 makes the cutting knife 31 on one side move towards the crushing member 2 while the cutting knife 31 on the other side moves away from the crushing member 2. The clearance size between the first crushing shaft 21 and the cutting knife 31 is constantly changing dynamically, which can effectively squeeze and loosen the material in the space of the crushing chamber 1, effectively prevent the material from being blocked during the crushing process due to the unchanged space size, and can also push the material at the corner position to the cutting area to improve the cutting efficiency.

[0059] Reference 4, Figure 2 and Figure 3, a screening component 5 for screening the incoming material is provided at the feed inlet of the crushing bin 1. The screening component 5 includes a fixed frame 51 fixedly connected to the top end of the positioning frame 41. During the reciprocating movement of the positioning frame 41, the fixed frame 51 will be driven to reciprocate, so as to preliminarily screen the fed material. The screening component 5 also includes a screen mesh 52 that is rotationally connected to the inner wall of the fixed frame 51 with damping. In the middle of both sides of the screen mesh 52, there are fixed shafts that are rotationally connected to the inner wall of the crushing bin 1. The rotation of the fixed shafts is controlled by a rotation switch through a PLC. Inside the screen mesh 52, there are screen holes one 53 and screen holes two 54 symmetrically distributed with the center line of the screen mesh 52 as the center. The screen holes one 53 are arranged on the left side of the fixed shaft, and the screen holes two 54 are arranged on the right side of the fixed shaft. The size of the screen holes two 54 is larger than the size of the screen holes one 53. On the right side inner wall of the screen mesh 52, there is a chute 521, and a sub-plate 55 is slidably connected to the chute 521. A damping strip is arranged on the side of the sub-plate 55. When the screen mesh 52 is in a horizontal state, the sub-plate 55 is completely embedded in the inner wall of the screen mesh 52. On the upper surface of the sub-plate 55, there is a fixed block 551, and the fixed block 551 contacts the side of the screen holes two 54. At this time, the minimum size of the through hole formed by the fixed block 551 and the screen holes two 54 is equal to the size of the screen holes one 53. Below the fixed frame 51, there is a guiding frame 56. The guiding frame 56 is arranged as a bent plate, and a rotating shaft passes through the bent part of the guiding frame 56. A knob spring is sleeved outside the rotating shaft, and both ends of the rotating shaft are rotationally connected to the inner wall of the crushing bin 1.

[0060] When the material is initially fed, the fixed frame 51 is flush with the screen mesh 52. The fixed frame 51 reciprocates with the positioning frame 41, and can vibrate and screen the fed material. At this time, the size of the screen holes one 53 is the same as the size of the screen holes two 54. Small-volume elastic plastic materials respectively fall into the inner wall of the crushing bin 1 from the screen holes one 53 and the screen holes two 54. The materials falling from the screen holes one 53 fall on the left side inner wall of the crushing bin 1, and the small-volume materials on the left are crushed and cut by the blades of the crushing shaft two 22. The materials falling from the screen holes two 54 first fall on the surface of the guiding frame 56, and then slide from the surface of the guiding frame 56 to the left crushing area of the crushing bin 1;

[0061] Then, when the material enters the middle feeding process, the fixed shaft of the screen 52 starts to rotate. The fixed shaft rotates clockwise first, and the fixed shaft drives the screen 52 to rotate. The screen 52 rotates under the restriction of the fixed frame 51 to squeeze the upper surface of the guide frame 56, so that the inclined side of the guide frame 56 fits the inner wall of the crushing bin 1. At this time, the inclined surface of the sieve hole 1 53 guides to the right side of the crushing bin 1, but there is a gap between the side of the screen 52 and the surface of the guide frame 56. The chute 521 on the right side of the screen 52 is also in an inclined state at this time, and the sub-plate 55 slides along the chute 521 under the action of gravity. , until the sub-plate 55 is in contact with the surface of the guide frame 56, the movement of the sub-plate 55 drives the stopper 551 to move, and the movement of the stopper 551 no longer restricts the size of the second sieve hole 54. At this time, the second sieve hole 54 is fully opened, and the large volume of elastomeric plastic remaining on the upper surface of the screen 52 falls from the second sieve hole 54 to the right side of the inner wall of the crushing bin 1 under the action of gravity. The small volume of material on the right side is crushed and cut by the blade of the crushing shaft 21, and the fallen material slides from the surface of the guide frame 56 under the guidance of the surface of the guide frame 56 to the crushing area on the right side of the crushing bin 1;

[0062] The materials that have been crushed fall to the lower hopper space under the action of gravity. The surface of the screen 52 returns to a horizontal state after the materials are put into the screen. At this time, some materials that do not meet the crushing standards are Figure 9 The interception of the screen filter 6 shown will not enter the discharge bin. After the set time, the screen filter 6 will be pulled out by the staff or the robot. As the fragments on the screen filter 6 fall on the surface of the screen 52, the fragments are screened by reciprocating movement and gravity. The fragments pass through the screen hole 1 53 and the screen hole 2 54 and fall into the left side of the crushing bin 1, and are crushed again to improve the crushing quality of the elastomer plastic.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for recycling elastomer plastics, characterized in that: include: S1. Classification: Classify the discarded elastomer plastics and remove impurities; S2, crushing: putting it into a crusher for crushing to obtain smaller particles; S3. Hot melting: Put the crushed elastomer plastic particles into a heating device to melt them at high temperature; S4, extrusion and granulation: the molten elastomer plastic is extruded into a strip shape through an extruder, and then cut into granules through a granulator; S5. Cooling: Cooling the granulated elastomer plastic particles to solidify them; S6. Packaging: Packing the particles for storage and transportation; The crusher in S2 includes a crushing bin (1), wherein a crushing piece (2) for crushing the elastomer plastic is rotatably connected inside the crushing bin (1), and the crushing piece (2) includes a crushing shaft (21) that rotates in the forward direction and a crushing shaft (22) that rotates in the reverse direction. The crushing shaft (21) and the crushing shaft (22) are rotatably connected via a transmission group (24) provided at one end of the crushing shaft (21). A connecting piece (4) is sleeved on the outer side of the crushing shaft (21), and a cross-cutting piece (3) is provided on the outer side of the connecting piece (4). When the crushing shaft (21) and the crushing shaft (22) rotate to crush the elastomer plastic to different degrees, the cross-cutting piece (3) performs a transverse reciprocating cutting to cut the materials stuck together between the crushing shaft (21) and the crushing shaft (22) again. A screening element (5) for sorting and guiding the elastomer plastic fed into the crushing bin (1) is provided above the crushing bin (1), and a sieve (6) is slidably connected to the bottom end of the side of the crushing bin (1); Both ends of the crushing shaft (21) are sleeved with positioning rings (25), the outer side of the positioning ring (25) is fixedly connected with a slider (251), and the slider (251) is movably connected to the connecting member (4); The connecting member (4) includes a positioning groove (42) slidably connected to the slider (251), and the positioning groove (42) is embedded in the inner wall of the positioning frame (41); The cross-cutting member (3) comprises a fixed plate (32) fixedly connected to the positioning frame (41), a plurality of cutters (31) are evenly arranged at one end of the fixed plate (32), a fixed rod (33) is fixedly connected to the middle of the side of the cutter (31) away from the crushing member (2), the top of the fixed rod (33) is slidably connected to the limiting groove (13) opened at the top of the crushing bin (1), a flat gear 1 (34) is fixedly sleeved at the position near the port at the bottom end of the fixed rod (33), the bottom end of the fixed rod (33) is rotatably connected to a bevel gear (35), the bevel gear (35) is embedded in the limiting groove (13) opened at the bottom end of the inner wall of the crushing bin (1), both sides of the flat gear 1 (34) are meshedly connected to the flat gear 2 (36), and the bottom end of the flat gear 2 (36) is fixedly connected to the flat gear 3 (37); The movement of the cutter (31) drives the fixed rod (33) to move, and the movement of the fixed rod (33) drives the flat gear 1 (34) and the bevel gear (35) to move. The bevel gear (35) slides inside the limiting groove (13). At this time, the cutter (31) cuts the material adhered to the gap between the matching pieces horizontally until the bevel gear (35) moves to the meshing position with the tooth plate (14). At this time, the bevel gear (35) is restricted by the meshing force of the tooth plate (14) and rotates while moving in the limiting groove (13). The rotation of the bevel gear (35) drives the flat gear 3 (37) meshed with it to rotate synchronously. The rotation of the flat gear 3 (37) drives the flat gear 2 (36) to rotate. The two flat gears 2 (36) are placed at the same angle. Therefore, when one of the flat gears 2 (36) is meshed with the flat gear 1 (34), the other flat gear 2 (36) is not meshed with the flat gear 1 (34). The flat gear 2 (36) is meshed with the flat gear 1 (34). The rotation of the bevel gear (35) drives the flat gear (37) (37) to rotate, and the flat gear (36) drives the flat gear (34) (34) to rotate. The flat gear (34) drives the fixed rod (33) to rotate. The fixed rod (33) drives the cutter (31) to rotate under the restriction of the fixed plate (32). Then, as the bevel gear (35) drives the flat gear (37) (37) to rotate, the other flat gear (36) gradually rotates to a position meshing with the flat gear (34). At this time, the other flat gear (36) drives the flat gear (34) (34) to rotate in the opposite direction. The flat gear (34) drives the cutter (31) (31) to rotate in the opposite direction through the fixed rod (33). Therefore, the cutter (31) swings in the process of the rear half of the process of moving forward in the direction of the crushing part (2) and the front half of the process of moving backward in the direction of the crushing part (2). Therefore, in the process of horizontal cutting, the debris gathered in the crushing bin (1) is also stirred to prevent the debris from clogging the connecting part (4) and the screen (6).

2. The method for recycling elastomer plastic according to claim 1, characterized in that: The transmission group (24) includes a bevel gear 1 (241) fixedly connected to one end of the crushing shaft 1 (21), a bevel gear 2 (242) meshingly connected to the outer side of the bevel gear 1 (241), a bevel gear 3 (243) meshingly connected to the outer side of the bevel gear 2 (242), a middle portion of one side of the bevel gear 2 (242) close to the bevel gear 1 (241) is fixedly connected to one end of the crushing shaft 2 (22), and the other end of the crushing shaft 1 (21) is fixedly connected to the motor (26).

3. The method for recycling elastomer plastic according to claim 1, characterized in that: The outer side of the positioning frame (41) is slidably connected to a limiting block (12), the limiting block (12) is fixed to the side of the inner wall of the crushing bin (1), and the two ends of the positioning frame (41) are slidably connected to the grooves (11) opened on the inner wall of the crushing bin (1).

4. The method for recycling elastomer plastic according to claim 1, characterized in that: A tooth plate (14) is fixedly connected to the inner wall of the limiting groove (13) provided at the bottom end of the crushing bin (1), and the tooth plate (14) is located close to the crushing piece (2).

5. The method for recycling elastomer plastic according to claim 3, characterized in that: The screening element (5) includes a fixing frame (51) fixedly connected to the top of the positioning frame (41), a screen (52) is provided on the inner wall of the fixing frame (51) for damped rotation, a screen hole (53) and a screen hole (54) are evenly provided on the surface of the screen (52), the screen hole (53) and the screen hole (54) are symmetrically distributed about the center line of the screen (52), a chute (521) is provided on the inner wall of the screen (52), a sub-plate (55) is slidably connected to the inner wall of the chute (521), and a stopper (551) is evenly fixed on the upper surface of the sub-plate (55).

6. The method for recycling elastomer plastic according to claim 5, characterized in that: The screening member (5) further comprises a guide frame (56) arranged below the fixed frame (51), one side of the guide frame (56) being in contact with the inner wall of the crushing bin (1), the guide frame (56) being a bent plate, the guide frame (56) being rotatably connected to the inner wall of the crushing bin (1) via a rotating shaft passing through the bent portion, and a knob spring being sleeved on the outer side of the rotating shaft.

Images