Plastic particle separator

Abstract

The present invention discloses a plastic particle separator, which includes a feed pipe, a separation box, a discharge pipe, a blast pipe, a dust removal pipe, a screening mechanism, an electrostatic mechanism and a viewing window. The separation box is fixedly connected to the feed pipe, the discharge pipe, the blast pipe, the dust removal pipe and the viewing window. The screening mechanism includes a side hole plate and a partition assembly. The side hole plate is fixedly connected to the separation box, and the partition assembly is fixedly connected to the separation box. The electrostatic mechanism includes a box body, and the box body is fixedly connected to the separation box and the partition assembly. The present invention relates to the technical field of plastic crushed material screening equipment. The present invention can completely screen particles of different sizes. After back-blowing and screening plastic particles, the electrostatically charged particles of different sizes and dust are completely separated, greatly improving the screening efficiency of crushed plastic particles.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic crushing material screening equipment, specifically a plastic particle separator. Background Art

[0002] In the existing separation of crushed materials, after crushing, the materials are separated through a cyclone separator and a vibrating screen. Since the freshly crushed materials are conveyed at high speed through a metal pipeline, the crushed material particles are electrostatically charged. The original design including a cyclone separator and a vibrating screen cannot completely and effectively screen out small particle powders. Excessive crushed material powders directly lead to the recycled materials being reused in the workshop production line, resulting in quality problems in the molding materials.

[0003] During the separation process, due to the different particle sizes and static electricity of plastic films during crushing, plastic particles without static electricity cannot be screened by an electrostatic screening machine. The plastic particle electrostatic screening technology is widely used in fields such as plastic recycling, plastic processing, and plastic manufacturing. It can help enterprises improve the purity and utilization rate of plastic particles, reduce production costs, and improve product quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a plastic particle separator to solve the problems in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: The plastic particle separator includes a feed pipe, a separation box, a discharge pipe, a blast pipe, a dust removal pipe, a screening mechanism, an electrostatic mechanism, and a viewing window. The separation box is fixedly connected to the feed pipe, the discharge pipe, the blast pipe, the dust removal pipe, and the viewing window. The screening mechanism includes a side hole plate and a partition component. The side hole plate is fixedly connected to the separation box, and the partition component is fixedly connected to the separation box. The electrostatic mechanism includes a box body, and the box body is fixedly connected to the separation box and the partition component.

[0006] The present invention is a sorting device for separating small particle powders in crushed plastics. The crushed materials are fed into the separation box through the feed pipe. The blast pipe ventilates the bottom of the separation box through the side hole plate and the partition component, and blows the falling materials in the opposite direction, causing the small particle powders to be lifted. The large particle crushed materials directly fall into the screening mechanism due to gravity and are discharged through the discharge pipe. When blowing the materials in the opposite direction, a part of the large particle crushed materials mixed with small particle crushed materials are lifted and fall into the box body. The large particle crushed materials and small particle crushed materials are separated again through the electrostatic mechanism. The large particle crushed materials flow back to the screening mechanism through the partition component and are discharged through the discharge pipe. The small particle crushed materials are sucked away by an external fan through the dust removal pipe, completing the complete removal of small particle powders in the plastic crushed materials.

[0007] Further, the screening mechanism further includes an air distribution plate and a slope baffle plate. The separation component includes a back plate. The air distribution plate and the slope baffle plate are both fixedly connected to the back plate. The air distribution plate, the slope baffle plate, and the back plate form a flow channel with the separation box. The back plate is provided with a main air inlet, a side air inlet, and a dust return port. The main air inlet is adjacent to the air distribution plate. The side air inlet is located below the slope baffle plate. The back plate is fixedly connected to the box body.

[0008] The plastic crushed material falls from the feed pipe and enters the flow channel formed by the air distribution plate, the slope baffle plate, the back plate, and the separation box. The air blowing pipe ventilates the separation box through the side hole plate, the side window, the main air inlet, and the side air inlet. The air flow passes through the air distribution plate through the main air inlet and passes through the slope baffle plate through the side air inlet to blow the crushed material falling in the flow channel in the opposite direction, causing small particle dust to rise. The large particle crushed material directly passes out through the discharge pipe.

[0009] Further, the separation component further includes a cross plate. The cross plate is fixedly connected to the back plate. The back plate is fixedly connected to the separation box. The cross plate is fixedly connected to the box body. The back plate, the cross plate, and the lower part of the separation box form an air intake chamber. The back plate, the cross plate, and the upper part of the separation box form an exhaust chamber. The cross plate is located above the side hole plate and above the main air inlet. The back plate is also provided with a dust return port. The box body is provided with a return port. The dust return port is fixedly connected to the return port.

[0010] The cross plate separates the back plate and the separation box. The lower part of the cross plate is the air intake chamber, and the upper part of the cross plate is the exhaust chamber. The air blowing pipe blows air into the separation box through the air intake chamber, the side hole plate, the side window, the main air inlet, and the side air inlet, causing the small particle dust mixed with some large particle dust to be blown up in the opposite direction. The mixed particle dust is sucked by the box body located in the exhaust chamber. The electrostatic mechanism separates the large particle crushed material and the small particle crushed material again. The large particle crushed material returns to the flow channel through the return port and passes out through the discharge pipe. The small particle crushed material is sucked away by an external fan through the dust removal pipe.

[0011] Further, the electrostatic mechanism further includes an electrostatic generator, a partition plate, side plates, a grille, a diversion mechanism, and a twisting mechanism. The electrostatic generator, the partition plate, and the side plates are all fixedly connected to the box body. The box body is also provided with a dust suction port. The grille is fixedly connected to the return port. The partition plate, the side plates, and the side of the box body close to the return port form a large particle chamber. The partition plate, the side plates, and the side of the box body close to the dust suction port form a small particle chamber. The diversion mechanism includes an upper frame and a first pulley. The twisting mechanism includes a lower frame and a second pulley. The upper frame and the lower frame are both fixedly connected to the box body. The first pulley and the second pulley are connected by a belt transmission.

[0012] The external fan extracts the gas in the electrostatic mechanism through the dust suction port, causing the box body to generate suction force on the broken material dust lifted up. The lifted dust falls into the diversion mechanism through the lower frame, and is combed into a linear shape that vertically drops along the axis of the lower frame. The dust dropping in a linear shape falls into the twisting mechanism through the lower frame. The twisting mechanism rubs the granular dust, causing the charge on the surface of the plastic particles to transfer, making the plastic particles carry static electricity and fall to the side of the electrostatic generator. The electrostatic generator generates a high-voltage electrostatic field, and the electric field force acts on the falling static electricity plastic in the horizontal direction. Through the force analysis of the gravity of the falling particles and the force in the horizontal direction of the electric field, large and small plastic particles are thrown in the electric field in the direction away from the return port. In the electrostatic field, small particles are more strongly affected by the electric field and receive a greater horizontal force from the electric field. The landing point of the small particle broken material throws over the isolation plate and falls into the small particle chamber and is extracted by the external fan through the dust suction port. The landing point of the large particle broken material cannot cross the isolation plate, and the large particle broken material falls into the large particle chamber and returns to the flow channel through the grid and the return port.

[0013] Further, the diversion mechanism further includes a servo motor, a gear set, and a diversion roller. The servo motor and the gear set are both fixedly connected to the upper frame. The first pulley is fixedly connected to the output end of the servo motor. The gear set is in transmission connection with the output end of the servo motor and the diversion roller. The diversion roller is rotatably connected to the upper frame.

[0014] There are two sets of diversion rollers. The lifted dust falls on the diversion rollers through the lower frame. The servo motor outputs a fixed-axis torque to the gear set, which is transmitted to the two sets of diversion rollers through the gear set. The two sets of diversion rollers rotate towards each other. The dust particles falling on the diversion rollers fall from the gap between the two sets of diversion rollers as the diversion rollers rotate relative to each other. The dust particles drop in a linear shape, and the servo motor outputs a fixed-axis torque to drive the first pulley to rotate.

[0015] Further, the twisting mechanism further includes a first gear rod, a second gear rod, a double-headed connecting rod, a reciprocating mechanism, and a rocker. The second pulley is fixedly connected to the first gear rod. The first gear rod and the second gear rod are both rotatably connected to the lower frame. The first gear rod is meshed with the tooth surface of the second gear rod. The second gear rod is fixedly connected to the double-headed connecting rod. The double-headed connecting rod is rotatably connected to the rocker. A sliding hole is provided on the lower frame. The reciprocating mechanism includes an outer frame and a sliding rod. The outer frame is fixedly connected to the lower frame. The sliding rod is slidably connected to the sliding hole. The sliding rod is hinged to the end of the rocker away from the double-headed connecting rod.

[0016] The servo motor outputs a fixed-axis torque to the first pulley. Through the belt drive between the first pulley and the second pulley, the torque is transmitted to the first gear rod. Through the meshing of the tooth surfaces of the first gear rod and the second gear rod, the second gear rod is fixedly assembled with a double-headed connecting rod. The fixed-axis torque of the servo motor is transmitted to the double-headed connecting rod. The double-headed connecting rod rotates around the axis of the second gear rod. The two ends of the double-headed connecting rod are respectively rotatably connected to two sets of rockers. The two sets of rockers are respectively hinged to two sets of sliding rods. Through the rotation of the double-headed connecting rod, the two sets of sliding rods are driven to reciprocate in the sliding holes, and the two sets of reciprocating mechanisms are driven to reciprocate simultaneously through the two sets of sliding rods.

[0017] Further, the reciprocating mechanism further includes a rack, a spring and a slider mechanism. The rack is fixedly connected to the outer frame. The slider mechanism includes a housing and a gear column. There is a sliding opening on the housing. The spring is fixedly connected to both the outer frame and the housing. The housing is slidably connected to the outer frame. The rack is slidably connected to the sliding opening. The rack is meshed with the tooth surface of the gear column.

[0018] The sliding rod drives the slider mechanism to reciprocate along the outer frame. The slider mechanism compresses the spring. At the same time, the slider mechanism reciprocates relative to the rack. Through the meshing of the tooth surfaces of the rack and the gear column, the relative sliding of the rack is converted into the reciprocating rotation of the gear column.

[0019] Further, the slider mechanism further includes a flower wheel and a side soft leather. The gear column is rotatably connected to the housing. The gear column is fixedly connected to the flower wheel. There are several groups of gear columns and flower wheels. Several groups of gear columns and flower wheels are linearly distributed along the housing. The side soft leather is fixedly connected to the outer frame. The flower wheel contacts the side soft leather.

[0020] Several groups of gear columns linearly distributed along the housing are all meshed with the tooth surface of the rack. When the rack reciprocates along the sliding opening, the gear columns drive the flower wheels to rotate reciprocally. The edges of several groups of flower wheels linearly distributed along the housing contact the side soft leather. When several groups of flower wheels rotate reciprocally, they prop up the side soft leather. By arranging two sets of opposite reciprocating mechanisms, when the two sets of opposite reciprocating mechanisms reciprocate simultaneously, the two sets of oppositely arranged side soft leathers contact and reciprocate frictionally while undulating in a wave shape, bionically simulating the action of fingertip rubbing. The particulate dust falls between the two sets of side soft leathers. The plastic particles are rubbed by the two sets of side soft leathers. Leather and plastic are two different materials, and they have differences in physical and chemical properties. When the two materials rub against each other, charge transfer occurs, so that the particulate dust is evenly electrostatically charged when it falls.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention designs a screening mechanism. The air blowing pipe blows air into the separation box, causing small particles to be blown up and discharged by back blowing. Most of the large particle broken materials directly pass through the discharge pipe, which can effectively screen plastic particles with static electricity according to particle size. The present invention designs an electrostatic mechanism. When back blowing the materials, a part of the large particle broken materials and small particle broken materials are blown up. The particles are sucked in by the suction generated by an external fan, and the dust is combed into a linear shape and falls vertically. Through simulation and twisting, the particle dust is rubbed, so that the plastic particles are charged with static electricity and fall to the side of the electrostatic generator. The electrostatic generator generates a high-voltage electrostatic field, and the electric field force exerts a horizontal force on the falling static electricity-carrying plastics. In the electrostatic field, small particles are more strongly affected by the electric field and receive a greater horizontal force from the electric field. The large and small particle broken materials are separated by using the falling trajectories and landing points of the large and small particle broken materials. The large particle broken materials fall into the large particle chamber and return to the flow channel through the grille and the return port. The present invention designs a twisting mechanism. The servo motor outputs torque to the guide roller, and the particles fall vertically in a linear shape through the gap between the two guide rollers, transmitting the torque to the double-headed connecting rod to drive the two side soft leathers to reciprocate and slide. The gear column drives the flower wheel to rotate reciprocally. The edge of the flower wheel contacts the side soft leather, and the two relatively arranged side soft leathers contact and reciprocally rub while undulating in a wave shape, bionically simulating the action of fingertip twisting. The particle dust falls between the two side soft leathers, and the two side soft leathers twist the plastic particles. Leather and plastic are two different materials. When the two materials rub against each other, charge transfer occurs, so that the particle dust is evenly attached with static electricity when falling. The present invention can completely screen particles of different sizes. After back blowing and screening plastic particles that may not necessarily contain static electricity, electrostatic secondary screening is carried out. The particles are actively attached with static electricity to completely separate the large and small particles, greatly improving the screening efficiency of broken plastic particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic diagram of the structure of the screening mechanism of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the partition component of the present invention;

[0025] Figure 4 is a schematic diagram of the structure of the electrostatic mechanism of the present invention;

[0026] Figure 5 is a schematic diagram of the structure of the diversion mechanism of the present invention;

[0027] Figure 6 is a schematic diagram of the structure of the twisting mechanism of the present invention;

[0028] Figure 7 is Figure 6 a partially enlarged schematic diagram of region A of

[0029] Figure 8 Schematic structural diagram of the slide bar mechanism of the present invention.

[0030] In the figure: 1, feed pipe; 2, separation box; 3, discharge pipe; 4, blast pipe; 5, dust removal pipe; 6, screening mechanism; 61, side hole plate; 62, partition component; 621, back plate; 6211, main air inlet; 6212, side air inlet; 6213, dust return port; 622, cross plate; 623, air inlet chamber; 624, exhaust chamber; 63, air distribution plate; 64, slope baffle; 65, flow channel; 7, electrostatic mechanism; 71, box body; 711, return port; 712, dust suction port; 72, electrostatic generator; 73, isolation plate; 74, side plate; 75, grille; 76, diversion mechanism; 761, upper frame; 762, servo motor; 763, first pulley; 764, gear set; 765, diversion roller; 77, twisting mechanism; 771, lower frame; 7711, sliding hole; 772, second pulley; 773, first gear rod; 774, second gear rod; 775, double-headed connecting rod; 776, reciprocating mechanism; 7761, outer frame; 7762, rack; 7763, spring; 7764, sliding rod; 7765, slide bar mechanism; 7766, outer shell; 77661, sliding port; 7767, gear column; 7768, flower wheel; 7769, side soft leather; 777, rocking frame; 78, large particle chamber; 79, small particle chamber; 8, viewing window. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figure 1 、 Figure 2 shown, the technical solution of the plastic particle separator provided by the present invention includes a feed pipe 1, a separation box 2, a discharge pipe 3, a blast pipe 4, a dust removal pipe 5, a screening mechanism 6, an electrostatic mechanism 7 and a viewing window 8. The separation box 2 is fixedly connected to the feed pipe 1, the discharge pipe 3, the blast pipe 4, the dust removal pipe 5 and the viewing window 8. The screening mechanism 6 includes a side hole plate 61 and a partition component 62. The side hole plate 61 is fixedly connected to the separation box 2, and the partition component 62 is fixedly connected to the separation box 2. The electrostatic mechanism 7 includes a box body 71, and the box body 71 is fixedly connected to the separation box 2 and the partition component 62.

[0033] The present invention relates to a sorting device for separating small particle powders from crushed plastics. The crushed materials are fed into the separation box 2 through the feed pipe 1. The air blowing pipe 4 ventilates the bottom of the separation box 2 through the side hole plate 61 and the partition component 62, and blows against the falling materials in the opposite direction, causing the small particle powders to be lifted up. The large particle crushed materials directly fall into the screening mechanism 6 and are discharged through the discharge pipe 3. When blowing against the materials, a part of the large particle crushed materials mixed with the small particle crushed materials are lifted up and fall into the box body 71, and the large particle crushed materials and the small particle crushed materials are separated again by the electrostatic mechanism 7. The large particle crushed materials flow back to the screening mechanism 6 through the partition component 62 and are discharged through the discharge pipe 3, while the small particle crushed materials are sucked away by an external fan through the dust removal pipe 5, thus completely removing the small particle powders from the plastic crushed materials.

[0034] As Figure 2 , Figure 3 , Figure 4 shown, the screening mechanism 6 further includes an air distribution plate 63 and a slope baffle 64. The partition component 62 includes a back plate 621. The air distribution plate 63 and the slope baffle 64 are both fixedly connected to the back plate 621. The air distribution plate 63, the slope baffle 64, the back plate 621 and the separation box 2 form a flow channel 65. The back plate 621 is provided with a main air inlet 6211, a side air inlet 6212 and a dust return port 6213. The main air inlet 6211 is adjacent to the air distribution plate 63, and the side air inlet 6212 is located below the slope baffle 64. The back plate 621 is fixedly connected to the box body 71.

[0035] The plastic crushed materials fall from the feed pipe 1 and enter the flow channel 65 formed by the air distribution plate 63, the slope baffle 64, the back plate 621 and the separation box 2. The air blowing pipe 4 ventilates the separation box 2 through the side hole plate 61, the side window 21, the main air inlet 6211 and the side air inlet 6212. The air flow passes through the main air inlet 6211, passes through the air distribution plate 63, and passes through the slope baffle 64 through the side air inlet 6212 to blow against the falling crushed materials in the flow channel 65, causing the small particle dust to be lifted up, and the large particle crushed materials are directly discharged through the discharge pipe 3.

[0036] As Figure 2 , Figure 3 , Figure 4 shown, the partition component 62 further includes a cross plate 622. The cross plate 622 is fixedly connected to the back plate 621. The back plate 621 is fixedly connected to the separation box 2. The cross plate 622 is fixedly connected to the box body 71. The back plate 621, the cross plate 622 and the lower part of the separation box 2 form an air intake chamber 623, and the back plate 621, the cross plate 622 and the upper part of the separation box 2 form an exhaust chamber 624. The cross plate 622 is located above the side hole plate 61 and above the main air inlet 6211. The back plate 621 is further provided with a dust return port 6213, and the box body 71 is provided with a return port 711. The dust return port 6213 is fixedly connected to the return port 711.

[0037] The transverse plate 622 separates the back plate 621 from the separation box 2. Below the transverse plate 622 is the air intake chamber 623, and above the transverse plate 622 is the exhaust chamber 624. The air duct 4 ventilates into the separation box 2 through the air intake chamber 623, the side hole plate 61, the side window 21, the main air outlet 6211, and the side air outlet 6212, causing the small particle dust mixed with some large particle dust to be blown up in a reverse direction. The mixed particle dust is sucked by the box body 71 located in the exhaust chamber 624. In the electrostatic mechanism 7, the large particle crushed material and the small particle crushed material are separated again. The large particle crushed material returns to the flow channel 65 through the return port 711 and the dust return port 6213 and is discharged through the discharge pipe 3. The small particle crushed material is sucked away by an external fan through the dust removal pipe 5.

[0038] As Figure 5 , Figure 6 , Figure 7 shown, the electrostatic mechanism 7 further includes an electrostatic generator 72, a partition plate 73, side plates 74, a grille 75, a diversion mechanism 76, and a twisting mechanism 77. The electrostatic generator 72, the partition plate 73, and the side plates 74 are all fixedly connected to the box body 71. A dust suction port 712 is also provided on the box body 71. The grille 75 is fixedly connected to the return port 711. The partition plate 73 and the side plates 74 form a large particle chamber 78 on one side of the box body 71 close to the return port 711, and the partition plate 73 and the side plates 74 form a small particle chamber 79 on one side of the box body 71 close to the dust suction port 712. The diversion mechanism 76 includes an upper frame 761 and a first pulley 763. The twisting mechanism 77 includes a lower frame 771 and a second pulley 772. The upper frame 761 and the lower frame 771 are both fixedly connected to the box body 71. The first pulley 763 and the second pulley 772 are connected by a belt for transmission.

[0039] The external fan extracts the gas in the electrostatic mechanism 7 through the dust suction port 712, causing the box body 71 to generate suction force on the lifted crushed material dust. The lifted dust falls into the diversion mechanism 76 through the lower frame 771 and is combed into a linear shape that vertically drops along the axis of the lower frame 771. The dust dropping in a linear shape falls into the twisting mechanism 77 through the lower frame 771. The twisting mechanism 77 rubs the particle dust, causing the charge on the surface of the plastic particles to transfer, so that the plastic particles are charged and fall to the side of the electrostatic generator 72. The electrostatic generator generates a high-voltage electrostatic field, and the electric field force acts on the falling static electricity plastic in the horizontal direction. Through the force analysis of the gravity of the falling particles and the horizontal direction of the electric field, the large and small particle plastics are thrown in the direction away from the return port 711 in the electric field. In the electrostatic field, the small particles are more affected by the electric field and receive a greater horizontal force from the electric field. The landing point of the small particle crushed material is thrown over the partition plate 73 and falls into the small particle chamber 79 and is extracted by the external fan through the dust suction port 712. The landing point of the large particle crushed material cannot cross the partition plate 73, and the large particle crushed material falls into the large particle chamber 78 and returns to the flow channel 65 through the grille 75 and the return port 711.

[0040] As Figure 5As shown, the diversion mechanism 76 further includes a servo motor 762, a gear set 764, and a diversion roller 765. The servo motor 762 and the gear set 764 are both fixedly connected to the upper frame 761. The first pulley 763 is fixedly connected to the output end of the servo motor 762. The gear set 764 is in transmission connection with the output end of the servo motor 762 and the diversion roller 765. The diversion roller 765 is rotatably connected to the upper frame 761.

[0041] There are two sets of diversion rollers 765. The raised dust falls on the diversion rollers 765 via the lower frame 771. The servo motor 762 outputs a fixed-axis torque to the gear set 764, which is transmitted to the two sets of diversion rollers 765 through the gear set 764. The two sets of diversion rollers 765 rotate towards each other. The dust particles falling on the diversion rollers 765 fall from the gap between the two sets of diversion rollers 765 as the diversion rollers 765 rotate relative to each other. The dust particles fall vertically in a linear shape. The servo motor 762 outputs a fixed-axis torque to drive the first pulley 763 to rotate.

[0042] As Figure 6 , Figure 7 shown, the twisting mechanism 77 further includes a first gear rod 773, a second gear rod 774, a double-headed connecting rod 775, a reciprocating mechanism 776, and a cradle 777. The second pulley 772 is fixedly connected to the first gear rod 773. The first gear rod 773 and the second gear rod 774 are both rotatably connected to the lower frame 771. The first gear rod 773 is in meshing engagement with the tooth surface of the second gear rod 774. The second gear rod 774 is fixedly connected to the double-headed connecting rod 775. The double-headed connecting rod 775 is rotatably connected to the cradle 777. A sliding hole 7711 is provided on the lower frame 771. The reciprocating mechanism 776 includes an outer frame 7761 and a sliding rod 7764. The outer frame 7761 is fixedly connected to the lower frame 771. The sliding rod 7764 is slidably connected to the sliding hole 7711. The sliding rod 7764 is hinged to one end of the cradle 777 away from the double-headed connecting rod 775.

[0043] The servo motor 762 outputs a fixed-axis torque to the first pulley 763. Through belt transmission between the first pulley 763 and the second pulley 772, the torque is transmitted to the first gear rod 773. Through meshing engagement between the tooth surface of the first gear rod 773 and the second gear rod 774, and the second gear rod 774 is fixedly assembled with the double-headed connecting rod 775, the fixed-axis torque of the servo motor 762 is transmitted to the double-headed connecting rod 775. The double-headed connecting rod 775 rotates around the axis of the second gear rod 774. The two ends of the double-headed connecting rod 775 are respectively rotatably connected to the two sets of cradles 777. The two sets of cradles 777 are respectively hinged to the two sets of sliding rods 7764. By the rotation of the double-headed connecting rod 775, the two sets of sliding rods 7764 are driven to reciprocate in the sliding hole 7711, and the two sets of reciprocating mechanisms 776 are driven to reciprocate simultaneously through the two sets of sliding rods 7764.

[0044] As Figure 6 , Figure 7 ,Figure 8 As shown, the reciprocating mechanism 776 further includes a rack 7762, a spring 7763 and a slider mechanism 7765. The rack 7762 is fixedly connected to the outer frame 7761. The slider mechanism 7765 includes a housing 7766 and a gear column 7767. A sliding port 77661 is provided on the housing 7766. The spring 7763 is fixedly connected to both the outer frame 7761 and the housing 7766. The housing 7766 is slidably connected to the outer frame 7761. The rack 7762 is slidably connected to the sliding port 77661. The rack 7762 is in meshing engagement with the tooth surface of the gear column 7767.

[0045] The slide bar 7764 drives the slider mechanism 7765 to reciprocate and slide along the outer frame 7761. When the slider mechanism 7765 moves, it compresses the spring 7763. At the same time, the slider mechanism 7765 reciprocates relative to the rack 7762. Through the meshing of the tooth surface of the rack 7762 and the gear column 7767, the relative sliding of the rack 7762 is converted into the reciprocating rotation of the gear column 7767.

[0046] As Figure 8 shown, the slider mechanism 7765 further includes a cam wheel 7768 and a side soft leather 7769. The gear column 7767 is rotatably connected to the housing 7766. The gear column 7767 is fixedly connected to the cam wheel 7768. There are several groups of the gear columns 7767 and the cam wheels 7768. Several groups of the gear columns 7767 and the cam wheels 7768 are linearly distributed along the housing 7766. The side soft leather 7769 is fixedly connected to the outer frame 7761. The cam wheel 7768 is in contact with the side soft leather 7769.

[0047] Several groups of the gear columns 7767 linearly distributed along the housing 7766 are all in meshing engagement with the tooth surface of the rack 7762. When the rack 7762 reciprocates and slides along the sliding port 77661, the gear column 7767 drives the cam wheel 7768 to reciprocate. The edges of several groups of the cam wheels 7768 linearly distributed along the housing 7766 are in contact with the side soft leather 7769. When several groups of the cam wheels 7768 reciprocate, they prop up the side soft leather 7769. By arranging two sets of opposite reciprocating mechanisms 776, when the two sets of opposite reciprocating mechanisms 776 reciprocate simultaneously, the two sets of oppositely arranged side soft leathers 7769 come into contact and reciprocate and rub against each other while showing undulations like waves, bionically simulating the action of fingertip rubbing. Granular dust falls between the two sets of side soft leathers 7769. The plastic particles are rubbed by the two sets of side soft leathers 7769. Leather and plastic are two different materials, and they have differences in physical and chemical properties. When the two materials rub against each other, charge transfer occurs, so that the granular dust is evenly charged with static electricity when it falls.

[0048] Working principle of the present invention: The crushed materials are introduced into the flow channel 65 through the feed pipe 1. The air blower pipe 4 ventilates the separation box 2 to blow the falling materials in the opposite direction, causing small particle powders to rise. The large particle crushed materials directly pass out through the discharge pipe 3. When blowing the materials in the opposite direction, some large particle crushed materials are mixed with small particle crushed materials and rise. The external blower sucks air to generate suction force on the rising crushed material dust. The rising dust falls on the guide rollers 765. The servo motor 762 outputs torque to the gear set 764, and the torque is transmitted to the two groups of guide rollers 765 through the gear set 764, and falls vertically in a linear shape through the gap between the two groups of guide rollers 765. Through the belt drive between the first pulley 763 and the second pulley 772, the torque is transmitted to the double-headed connecting rod 775 to drive the two sliding rods 7764 to reciprocate. When the rack 7762 reciprocates along the sliding port 77661, the gear column 7767 drives the flower wheel 7768 to rotate reciprocally. The edge of the flower wheel 7768 contacts the side soft leather 7769. The two relatively arranged side soft leathers 7769 contact and reciprocally rub while undulating in a wave shape, bionically simulating the action of fingertip rubbing. The particle dust falls between the two side soft leathers 7769, and the plastic particles are rubbed by the two side soft leathers 7769, so that the particle dust is evenly attached with static electricity when falling. The plastic particles with static electricity fall to the side of the electrostatic generator 72. The electrostatic generator generates a high-voltage electrostatic field, and the electric field force acts on the falling static electricity plastics in the horizontal direction. Through the force analysis of the gravity of the falling particles and the horizontal direction electric field, the large and small particle plastics are thrown in the electric field in the direction away from the return port 711. In the electrostatic field, the small particles are more strongly affected by the electric field and are subjected to a greater horizontal acting force of the electric field. The landing point of the small particle crushed materials is thrown over the isolation plate 73 and falls into the small particle chamber 79 and is extracted by the external blower through the dust suction port 712. The landing point of the large particle crushed materials cannot cross the isolation plate 73, and the large particle crushed materials fall into the large particle chamber 78 and return to the flow channel 65 through the grille 75 and the return port 711. The small particle crushed materials are sucked away by the external blower through the dust removal pipe 5, and the complete removal of the small particle powders in the plastic crushed materials is completed.

[0049] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. Plastic particle separator, characterized in that: The separator comprises a feed pipe (1), a separation box (2), a discharge pipe (3), an air blast pipe (4), a dust removal pipe (5), a screening mechanism (6), an electrostatic mechanism (7) and a viewing window (8); the separation box (2) is fixedly connected to the feed pipe (1), the discharge pipe (3), the air blast pipe (4), the dust removal pipe (5) and the viewing window (8); a side window (21) is provided on the separation box (2); the screening mechanism (6) comprises a side pipe (61) and a partition assembly (62); the side pipe (61) is fixedly connected to the side window (21); the partition assembly (62) is fixedly connected to the separation box (2); the electrostatic mechanism (7) comprises a box body (71); the box body (71) is fixedly connected to the separation box (2) and the partition assembly (62); The partition assembly (62) comprises a back plate (621), and the back plate (621) is fixedly connected to the box body (71); The back plate (621) is also provided with a dust return port (6213), the box body (71) is provided with a return flow port (711), and the dust return port (6213) is fixedly connected to the return flow port (711); The electrostatic mechanism (7) further comprises an electrostatic generator (72), an isolation plate (73), a side plate (74), a grille (75), a flow guide mechanism (76) and a twisting mechanism (77); the electrostatic generator (72), the isolation plate (73) and the side plate (74) are all fixedly connected to the box body (71); a dust suction port (712) is also provided on the box body (71); the grille (75) is fixedly connected to the return port (711); the isolation plate (73), the side plate (74) and the side of the box body (71) close to the return port (711) form a large particle chamber (78); and the isolation plate (73), the side plate (74) and the side of the box body (71) close to the dust suction port (712) form a small particle chamber (79); The twisting mechanism (77) comprises a lower frame (771) and a second pulley (772); A first gear rod (773), a second gear rod (774), a double-ended connecting rod (775), a reciprocating mechanism (776) and a cradle (777); the second belt pulley (772) is fixedly connected to the first gear rod (773); the first gear rod (773) and the second gear rod (774) are both rotatably connected to the lower frame (771); the first gear rod (773) and the second gear rod (774) have tooth surfaces meshing with each other; the second gear rod (774) and the double-ended connecting rod (775) are fixedly connected to each other. The double-headed connecting rod (775) is rotatably connected to the cradle (777); a sliding hole (7711) is provided on the lower frame (771); the reciprocating mechanism (776) comprises an outer frame (7761) and a sliding rod (7764); the outer frame (7761) is fixedly connected to the lower frame (771); the sliding rod (7764) is slidably connected to the sliding hole (7711); and the sliding rod (7764) is hinged to one end of the cradle (777) away from the double-headed connecting rod (775); The reciprocating mechanism (776) further comprises a rack (7762), a spring (7763) and a slide mechanism (7765); the rack (7762) is fixedly connected to the outer frame (7761); the slide mechanism (7765) comprises a housing (7766) and a gear column (7767); a sliding opening (77661) is provided on the housing (7766); the spring (7763) is fixedly connected to the outer frame (7761) and the housing (7766); the housing (7766) is slidably connected to the outer frame (7761); the rack (7762) is slidably connected to the sliding opening (77661); the rack (7762) is meshed with the tooth surface of the gear column (7767); The slide mechanism (7765) further comprises a flower wheel (7768) and a side soft leather (7769); the gear column (7767) is rotatably connected to the outer shell (7766); the gear column (7767) is fixedly connected to the flower wheel (7768); the gear column (7767) and the flower wheel (7768) are each provided with a plurality of groups; the plurality of groups of the gear columns (7767) and the flower wheels (7768) are linearly evenly distributed along the outer shell (7766); the side soft leather (7769) is fixedly connected to the outer frame (7761); and the flower wheel (7768) is in contact with the side soft leather (7769).

2. The plastic particle separator according to claim 1, characterized in that: The screening mechanism (6) further comprises an air distribution plate (63) and a slope baffle (64); the air distribution plate (63) and the slope baffle (64) are both fixedly connected to the back plate (621); the air distribution plate (63), the slope baffle (64), the back plate (621) and the separation box (2) form a flow channel (65); a main air port (6211) and a side air port (6212) are provided on the back plate (621); the main air port (6211) is adjacent to the air distribution plate (63); and the side air port (6212) is located below the slope baffle (64).

3. The plastic particle separator according to claim 2, characterized in that: The partition assembly (62) further comprises a transverse plate (622), wherein the transverse plate (622) is fixedly connected to the back plate (621), the back plate (621) is fixedly connected to the separation box (2), the transverse plate (622) is fixedly connected to the box body (71), the back plate (621), the transverse plate (622) and the bottom of the separation box (2) form an air intake cabin (623), and the back plate (621), the transverse plate (622) and the top of the separation box (2) form an exhaust cabin (624), the transverse plate (622) is located below the side pipe (61), and the transverse plate (622) is located above the main air outlet (6211).

4. The plastic particle separator according to claim 3, characterized in that: The flow guide mechanism (76) comprises an upper frame (761) and a first belt pulley (763); the upper frame (761) and the lower frame (771) are both fixedly connected to the box body (71); and the first belt pulley (763) and the second belt pulley (772) are connected via a belt transmission.

5. The plastic particle separator according to claim 4, characterized in that: The flow guide mechanism (76) further comprises a servo motor (762), a gear set (764) and a flow guide roller (765); the servo motor (762) and the gear set (764) are both fixedly connected to the upper frame (761); the first pulley (763) is fixedly connected to the output end of the servo motor (762); the gear set (764) is transmission-connected to the output end of the servo motor (762) and the flow guide roller (765); and the flow guide roller (765) is rotationally connected to the upper frame (761).

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