Waste plastic recycling device

Abstract

The invention belongs to the technical field of plastic recycling, and particularly relates to a waste plastic recycling device which comprises a screening box. A smashing roller is rotationally connected into the screening box through a roller shaft, and a driving mechanism is arranged at one end of the smashing roller. Baffles are symmetrically and fixedly connected to the inner wall of the top of the screening box. The tops of the two screening boxes are fixedly connected with a movable box. The baffle plate is aligned with the bottom opening of the movable box; a pressing mechanism is arranged in the movable box; an output shaft of a third motor drives a reciprocating lead screw to rotate, the reciprocating lead screw drives a lower pressing plate to reciprocate up and down, waste plastic products are pressed downwards through the lower pressing plate, meanwhile, the lower pressing plate drives a scraper to move downwards, the scraper moves in the direction of a smashing roller, and the plastic products are smashed through the smashing roller. And the plastic products are pressed downwards through the lower pressing plate, so that the situation that crushing of the plastic products is affected due to the fact that the plastic products stay on the crushing rollers all the time during crushing is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic recycling, and specifically relates to a device for recycling and reusing waste plastics. Background Art

[0002] Plastic products are widely used in various fields, from daily necessities to industrial products, and are almost everywhere. However, with the continuous increase in plastic consumption, the problem of waste plastics has become increasingly prominent. A large amount of waste plastics are discarded randomly, which not only occupies valuable land resources but also may pose a serious threat to the ecological environment. By using special environmental protection equipment for comprehensive utilization of waste, waste plastics can be transformed into new resources for the production of various plastic products, thereby reducing the demand for virgin plastics.

[0003] A Chinese patent with the publication number CN108673788A discloses a device for recycling and reusing waste plastics, which includes a whole machine support, a feeding support, a screening plate, a screening connecting plate, a dehydration outer support, a dehydration inner support, a power mechanism, a crushing driving mechanism, a crushing driven mechanism, a transmission mechanism, a dehydration mechanism, a storage box, a connecting rod, a long connecting rod, and a closing slider. The crushing cutters Ⅰ and Ⅱ provided on the crushing driving mechanism and the crushing driven mechanism are arranged in an interlaced manner, which can crush the plastic waste in the closed space formed by the screening plate, the feeding support, and the two connecting plates. The plastic waste after crushing is screened by the screening plate and falls into the dehydration inner support through the screening connecting plate. The dehydration mechanism separates the water in the plastic waste after crushing, and the dehydration mechanism pushes the plastic waste after crushing to be extruded with the thermoforming plate, and the plastic waste is extruded and formed and falls into the storage box.

[0004] Currently, in the prior art, when crushing plastic waste, due to the light weight of plastics, the crushing cutters may not be able to effectively crush the plastics. The plastics may stay above the crushing cutters all the time, and for larger plastics, it is also difficult to enter between the crushing cutters and cannot be crushed, thus affecting the efficiency of plastic crushing.

[0005] Therefore, the present invention provides a device for recycling and reusing waste plastics. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An apparatus for recycling waste plastics according to the present invention includes a screening box; a crushing roller is rotatably connected in the screening box through a roller shaft, and a driving mechanism is provided at one end of the crushing roller; baffles are symmetrically and fixedly connected to the inner wall of the top of the screening box; a movable box is fixedly connected to the top of the two screening boxes; the baffles are aligned with the bottom opening of the movable box; a pressing mechanism is provided in the movable box; the pressing mechanism includes a lower pressing plate, and a plurality of scraping blades are fixedly connected to the bottom of the lower pressing plate. The scraping blades are provided in two groups and are respectively matched with the crushing roller; two mounting plates are fixedly connected to the inner wall of the movable box, and two vertical rods are fixedly connected between the mounting plates and the inner wall of the top of the movable box. The lower pressing plate is slidably connected to the plurality of vertical rods; a third motor is fixedly connected to the bottom of the movable box, the output shaft of the third motor is rotatably connected to the movable box through a bearing, the output shaft of the third motor is fixedly connected with a reciprocating lead screw, the bottom of the reciprocating lead screw is rotatably connected to the mounting plate through a bearing, and the lower pressing plate is threadedly connected to the reciprocating lead screw; a vertical plate is fixedly connected to one end of the top of the lower pressing plate, and the vertical plate is parallel to the direction of the scraping blade; the vertical plate slidably penetrates through the movable box.

[0008] Preferably, a conveying cylinder is fixedly connected to the outer wall of the movable box close to the vertical plate, a second motor is fixedly connected to the side wall of the conveying cylinder away from the movable box, and one end of the conveying cylinder close to the movable box is communicated with the movable box; the output shaft of the second motor is fixedly connected with a screw shaft, screw blades are fixedly connected to the screw shaft, and a feeding hopper is fixedly connected and communicated to the top of the conveying cylinder.

[0009] Preferably, the driving mechanism includes two first gears fixedly connected to one end of the roller shaft; the two first gears mesh with each other; a first motor is fixedly connected to the outer wall of the screening box, and the output shaft of the first motor is fixedly connected to the roller shaft.

[0010] Preferably, a first screening basket and a second screening basket are sequentially arranged in the screening box from top to bottom, and the screening holes of the first screening basket are larger than those of the second screening basket; vibration mechanisms are provided on both the first screening basket and the second screening basket; a blanking hopper is fixedly connected to the bottom of the screening box.

[0011] Preferably, the vibration mechanism includes four side plates fixedly connected to the side wall of the screening basket; two sliding columns are fixedly connected to each side plate; springs are sleeved on the outer sides of the bottom ends of the sliding columns, and the bottoms of the springs are fixedly connected to the side plates; the first screening basket and the second screening basket are respectively slidably connected to the sliding columns; vibrators are installed at the bottoms of the first screening basket and the second screening basket.

[0012] Preferably, a feeding cylinder is fixedly connected to the side wall of the screening box; a first discharge port is formed in the side wall of the screening box, and the first discharge port is used to communicate the feeding cylinder and the first screening basket; a rotating shaft is rotatably connected in the feeding cylinder, an arc-shaped blade is fixedly connected to the outer wall of the top end of the rotating shaft, a spiral blade is arranged below the arc-shaped blade, and the spiral blade is fixedly connected to the outer wall of the rotating shaft; a guide pipe is fixedly connected between the top end of the feeding cylinder and the top of the screening box, and the guide pipe is flush with the height of the arc-shaped blade; a linkage mechanism is arranged at the bottom of the rotating shaft.

[0013] Preferably, a hot pressing box is fixedly connected to the bottom end side wall of the screening box, a second discharge port is formed in the screening box, and the second discharge port is used to communicate the hot pressing box and the second discharge port; a pressure plate is arranged on the inner wall of the top end of the hot pressing box, and a lifting mechanism is arranged on the top of the pressure plate; a rotating plate is rotatably connected to the bottom end of the hot pressing box through a rotating shaft, and a rotating mechanism is arranged at one end of the rotating plate; heating plates are respectively arranged at the bottom of the pressure plate and the top of the rotating plate.

[0014] Preferably, the lifting mechanism includes a bidirectional ball screw rotatably connected to the inner wall of the hot pressing box through a bearing, two moving plates are threadedly connected to the bidirectional ball screw, and the bottoms of the moving plates are respectively rotatably connected to a connecting plate through a pin shaft; two connecting blocks are symmetrically and fixedly connected to the top of the pressure plate; the bottoms of the connecting plates are respectively rotatably connected to the connecting blocks through a pin shaft; a fourth motor is arranged at one end of the bidirectional ball screw; a blocking plate is fixedly connected to the top of one end of the pressure plate close to the screening box, the blocking plate cooperates with the second discharge port, and the blocking plate slidably penetrates through the hot pressing box; two guide rods are fixedly connected to the inner wall of the hot pressing box, and the moving plates are respectively slidably connected to the two guide rods.

[0015] Preferably, the rotating mechanism includes a second gear fixedly connected to one end of the rotating shaft; an electric push rod is fixedly connected to the outer wall of the hot pressing box, a rack is fixedly connected to the output end of the electric push rod, and the rack meshes with the second gear; a push plate is fixedly connected to the side wall of the rack, two sliding rods are fixedly connected to a rectangular plate on the side wall of the hot pressing box, and the push plate is slidably connected to the two sliding rods; a pressure sensor is installed at the bottom of the rotating plate.

[0016] Preferably, the linkage mechanism includes a first runner fixedly connected to the bidirectional ball screw; two first fixing plates are fixedly connected to the top of the hot pressing box, a first rotating rod is rotatably connected to the two first fixing plates, and a second runner and a third runner are fixedly connected to the first rotating rod; a first belt is sleeved between the second runner and the first runner; two second fixing plates are fixedly connected to the top of the hot pressing box, a second rotating rod is rotatably connected to the two second fixing plates, and a fourth runner and a worm gear are fixedly connected to the second rotating rod; a second belt is sleeved between the fourth runner and the third runner, a worm is fixedly connected to the bottom of the rotating shaft, and the worm is engaged with the worm gear.

[0017] The beneficial effects of the present invention are as follows: 1. For the waste plastic recycling and reuse device of the present invention, through the cooperation of the lower pressing plate and the scraper, while pulverizing, it is necessary to start the third motor. The output shaft of the third motor drives the reciprocating screw to rotate, the reciprocating screw drives the lower pressing plate to move up and down reciprocally, the lower pressing plate presses the waste plastic products downward, and at the same time, the lower pressing plate drives the scraper to move downward, the scraper moves towards the pulverizing roller, and the pulverizing roller pulverizes the plastic products. The lower pressing plate presses the plastic products downward to prevent them from staying on the pulverizing roller all the time and affecting the pulverization of the plastic products.

[0018] 2. For the waste plastic recycling and reuse device of the present invention, by setting the first screening basket and the second screening basket, after the plastic products are pulverized by the pulverizing roller, the large-particle pulverized materials are screened by the first screening basket, and then the large-particle pulverized materials are pulverized again; the large and small particle pulverized materials are screened by the second screening basket, and then the small particle pulverized materials are hot-pressed; finally, some small particle dust pulverized materials and part of the packaged water fall into the blanking hopper through the second screening basket for unified discharge.

[0019] 3. For the waste plastic recycling and reuse device of the present invention, through the cooperation of the first belt, the second belt, the worm gear and the worm, during the rotation of the bidirectional ball screw, the bidirectional ball screw drives the first runner to rotate, the first runner drives the first belt to rotate, the first belt drives the second runner to rotate, the second runner drives the first rotating rod to rotate, the first rotating rod drives the third runner to rotate, the third runner drives the second belt to rotate, the second belt drives the fourth runner to rotate, the fourth runner drives the second rotating rod to rotate, the second rotating rod drives the worm gear to rotate, the worm gear drives the worm to rotate, and the worm drives the rotating shaft to rotate, so as to realize the synchronous progress of conveying and hot pressing. Description of the Drawings

[0020] The present invention will be further described below with reference to the drawings.

[0021] Figure 1 is the three-dimensional view of the present invention; Figure 2 is a schematic structural view of the hot pressing box in the present invention; Figure 3 is a front view sectional view in the present invention; Figure 4 is a left view sectional view in the present invention; Figure 5 is a schematic structural view of the first screening basket in the present invention; Figure 6 is a schematic structural view of the lower pressing plate in the present invention; Figure 7 is a schematic structural view of the arc-shaped blade in the present invention; Figure 8 is a schematic structural view of the pressure plate in the present invention; Figure 9 is a schematic structural view of the worm gear and the worm in the present invention; Figure 10 is a schematic structural view of the rotating plate in the present invention; In the figure: 1, screening box; 11, roller shaft; 12, crushing roller; 13, first gear; 14, first motor; 15, baffle; 16, first screening basket; 161, side plate; 162, sliding column; 163, spring; 164, vibrator; 17, second screening basket; 18, first discharge port; 19, second discharge port; 110, blanking hopper; 2, conveying cylinder; 21, second motor; 22, feeding hopper; 23, auger shaft; 24, auger blade; 3, movable box; 31, vertical plate; 32, lower pressing plate; 33, third motor; 34, reciprocating lead screw; 35, vertical rod; 36, mounting plate; 37, scraper; 4, material conveying cylinder; 41, rotating shaft; 42, spiral blade; 43, arc-shaped blade; 5, hot pressing box; 51, rotating plate; 511, pressure sensor; 512, second gear; 513, rack; 514, electric push rod; 515, push plate; 516, sliding rod; 517, rectangular plate; 52, pressure plate; 521, connecting block; 522, connecting plate; 523, moving plate; 524, bidirectional ball screw; 525, guide rod; 526, fourth motor; 527, first runner; 528, first belt; 53, sealing plate; 54, first rotating rod; 541, second runner; 542, first fixing plate; 543, third runner; 544, second belt; 55, second fixing plate; 551, second rotating rod; 552, fourth runner; 553, worm gear; 554, worm. Detailed implementation manners

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0023] Such as Figures 1 to 6As shown in the figure, a waste plastic recycling and reuse device according to an embodiment of the present invention includes a screening box 1; a crushing roller 12 is rotatably connected in the screening box 1 through a roller shaft 11, and a driving mechanism is provided at one end of the crushing roller 12; baffle plates 15 are symmetrically and fixedly connected to the inner wall of the top of the screening box 1; a movable box 3 is fixedly connected to the top of the two screening boxes 1; the baffle plates 15 are aligned with the bottom opening of the movable box 3; a pressing mechanism is provided in the movable box 3; the pressing mechanism includes a lower pressing plate 32, and a plurality of scraping knives 37 are fixedly connected to the bottom of the lower pressing plate 32. The scraping knives 37 are provided in two groups and are respectively matched with the crushing roller 12; two mounting plates 36 are fixedly connected to the inner wall of the movable box 3, and two vertical rods 35 are fixedly connected between the mounting plates 36 and the inner wall of the top of the movable box 3. The lower pressing plate 32 is slidably connected to the plurality of vertical rods 35; a third motor 33 is fixedly connected to the bottom of the movable box 3, and the output shaft of the third motor 33 is rotatably connected to the movable box 3 through a bearing. The output shaft of the third motor 33 is fixedly connected with a reciprocating lead screw 34, and the bottom of the reciprocating lead screw 34 is rotatably connected to the mounting plate 36 through a bearing. The lower pressing plate 32 is threadedly connected to the reciprocating lead screw 34; a vertical plate 31 is fixedly connected to one end of the top of the lower pressing plate 32, and the vertical plate 31 is parallel to the direction of the scraping knife 37; the vertical plate 31 slidably penetrates through the movable box 3.

[0024] By using special equipment for manufacturing environmental protection such as comprehensive utilization of waste, waste plastics can be converted into new resources for the production of various plastic products, thereby reducing the demand for virgin plastics; however, when crushing plastic waste, due to the light weight of plastics, the crushing tools may not be able to effectively crush the plastics. The plastics may stay above the crushing tools all the time, and it is also difficult for larger plastics to enter between the crushing tools and cannot be crushed, thus affecting the efficiency of plastic crushing.

[0025] When the pressing mechanism provided by the present invention is in use, first, waste plastic products are conveyed to the movable box 3 through the conveying cylinder 2, and then fall into the screening box 1 under the action of gravity. In the screening box 1, the roller shaft 11 is rotated, and the roller shaft 11 drives the crushing roller 12 to rotate, so as to realize the crushing treatment of waste plastic products. During the crushing, the third motor 33 needs to be started. The output shaft of the third motor 33 drives the reciprocating lead screw 34 to rotate, and the reciprocating lead screw 34 drives the lower pressing plate 32 to move up and down reciprocally. The waste plastic products are pressed downward by the lower pressing plate 32. At the same time, the lower pressing plate 32 drives the scraping knife 37 to move downward, and the scraping knife 37 moves towards the crushing roller 12. The crushing roller 12 crushes the plastic products. The plastic products are pressed downward by the lower pressing plate 32 to prevent them from staying on the crushing roller 12 all the time during crushing, which affects the crushing of plastic products; during the movement of the lower pressing plate 32, the lower pressing plate 32 slides on the vertical rod 35, and the vertical rod 35 limits the lower pressing plate 32 to move in the vertical direction.

[0026] As Figure 3 shown, a conveying cylinder 2 is fixedly connected to the outer wall of the movable box 3 close to the vertical plate 31. A second motor 21 is fixedly connected to one side wall of the conveying cylinder 2 away from the movable box 3. One end of the conveying cylinder 2 close to the movable box 3 is communicated with the movable box 3. The output shaft of the second motor 21 is fixedly connected with a screw shaft 23. Screw blades 24 are fixedly connected to the screw shaft 23. A feeding hopper 22 is fixedly connected and communicated to the top of the conveying cylinder 2.

[0027] The screw blades 24 provided by the present invention are used for conveying plastic products during use. The screw shaft 23 is driven to rotate by the first motor 14. The screw blades 24 are driven to rotate by the screw shaft 23. The plastic products are driven to be conveyed forward by the screw blades 24. During the movement of the lower pressing plate 32, the lower pressing plate 32 drives the vertical plate 31 to move. When the lower pressing plate 32 drives the vertical plate 31 to move to the bottom end of the movable box 3, the lower pressing plate 32 is used to press the plastic products, and the vertical plate 31 is used to block the conveying cylinder 2. On the one hand, it prevents the plastic products from being conveyed above the lower pressing plate 32. On the other hand, the plastic products are squeezed on one side of the vertical plate 31 by the screw blades 24, and the plastic products are pre-treated to facilitate crushing.

[0028] As Figure 2 shown, the driving mechanism includes two first gears 13 fixedly connected to one end of the roller shaft 11. The two first gears 13 are meshed with each other. A first motor 14 is fixedly connected to the outer wall of the screening box 1. The output shaft of the first motor 14 is fixedly connected to the roller shaft 11.

[0029] When the driving mechanism provided by the present invention is in use and plastic products need to be crushed, the output shaft of the first motor 14 is started to drive the connected roller shaft 11 to rotate. The connected first gear 13 is driven to rotate by the roller shaft 11. Another first gear 13 is driven to rotate by the first gear 13. The connected roller shaft 11 is driven to rotate by another gear, so as to realize the effect of driving the crushing rollers 12 to rotate in reverse synchronously through the two roller shafts 11.

[0030] As Figure 3 shown, a first screening basket 16 and a second screening basket 17 are sequentially arranged in the screening box 1 from top to bottom. The screening holes of the first screening basket 16 are larger than those of the second screening basket 17. Vibration mechanisms are arranged on both the first screening basket 16 and the second screening basket 17. A blanking hopper 110 is fixedly connected to the bottom of the screening box 1.

[0031] The first screening basket 16 and the second screening basket 17 provided by the present invention are used for screening crushed materials of different particles during use. After the plastic products are crushed by the crushing roller 12, the large-particle crushed materials are screened by the first screening basket 16, and then the large-particle crushed materials are crushed again; the large and small particle crushed materials are screened by the second screening basket 17, and then the small-particle crushed materials are hot-pressed; finally, some small-particle dust and part of the packaged water fall into the blanking hopper 110 through the second screening basket 17 for unified discharge.

[0032] As Figure 5 shown, the vibration mechanism includes four side plates 161 fixedly connected to the side wall of the screening basket; two sliding columns 162 are fixedly connected to each of the side plates 161; springs 163 are sleeved on the outer sides of the bottom ends of the sliding columns 162, and the bottoms of the springs 163 are fixedly connected to the side plates 161; the first screening basket 16 and the second screening basket 17 are respectively slidably connected to the sliding columns 162; vibrators 164 are installed at the bottoms of the first screening basket 16 and the second screening basket 17.

[0033] The vibration mechanism provided by the present invention is used for accelerating screening during use. During the screening process, by turning on the vibrator 164, the first screening basket 16 and the second screening basket 17 are driven to shake. Under the action of the springs 163, the shaking of the first screening basket 16 and the second screening basket 17 is accelerated, improving the screening efficiency.

[0034] As Figure 4 and Figure 7 shown, a feeding cylinder 4 is fixedly connected to the side wall of the screening box 1; a first discharge port 18 is opened on the side wall of the screening box 1, and the first discharge port 18 is used to connect the feeding cylinder 4 and the first screening basket 16; a rotating shaft 41 is rotatably connected in the feeding cylinder 4, an arc-shaped blade 43 is fixedly connected to the outer wall of the top end of the rotating shaft 41, a spiral blade 42 is arranged below the arc-shaped blade 43, and the spiral blade 42 is fixedly connected to the outer wall of the rotating shaft 41; the top end of the feeding cylinder 4 is connected and fixedly connected to the screening box 1 at the top through a diversion pipe, and the diversion pipe is flush with the height of the arc-shaped blade 43; a linkage mechanism is arranged at the bottom of the rotating shaft 41.

[0035] During use of the feeding cylinder 4 provided by the present invention, the large-particle crushed materials fall into the feeding cylinder 4 through the first discharge port 18, and then by driving the rotation of the rotating shaft 41, the spiral blade 42 is driven by the rotating shaft 41, and the large-particle crushed materials are driven by the spiral blade 42 to be conveyed upward until they reach the position of the arc-shaped blade 43. At this time, the arc-shaped blade 43 is driven by the rotating shaft 41 to perform centrifugal motion, and the large-particle crushed materials are thrown above the crushing roller 12 through the diversion pipe by the arc-shaped blade 43, and then are crushed for the second time to improve the crushing effect.

[0036] As Figure 4and Figure 8 As shown in the figure, a hot pressing box 5 is fixedly connected to the bottom side wall of the screening box 1. A second discharge port 19 is formed in the screening box 1, and the second discharge port 19 is used to communicate the hot pressing box 5 and the second discharge port 19. A pressure plate 52 is provided on the inner wall of the top end of the hot pressing box 5, and a lifting mechanism is provided on the top of the pressure plate 52. The bottom end of the hot pressing box 5 is rotatably connected to a rotating plate 51 through a rotating shaft, and a rotating mechanism is provided at one end of the rotating plate 51. Heating plates are respectively provided at the bottom of the pressure plate 52 and the top of the rotating plate 51.

[0037] The hot pressing box 5 provided by the present invention is used to hot press small particle pulverized matter into blocks during use, which is convenient for storage and reuse. The small particle pulverized matter is screened and filtered by the second screening basket 17 and finally output from the second discharge port 19 into the hot pressing box 5. By driving the lifting mechanism to drive the pressure plate 52 to move downward, the pressure plate 52 drives the heating plate to heat and extrude together with the heating plate on the rotating plate 51, so as to realize hot pressing and forming of the small particle pulverized matter.

[0038] As Figure 8 shown in the figure, the lifting mechanism includes a bidirectional ball screw 524 rotatably connected to the inner wall of the hot pressing box 5 through a bearing. Two moving plates 523 are threadedly connected to the bidirectional ball screw 524. The bottoms of the moving plates 523 are respectively rotatably connected to connecting plates 522 through pins. Two connecting blocks 521 are symmetrically and fixedly connected to the top of the pressure plate 52. The bottoms of the connecting plates 522 are respectively rotatably connected to the connecting blocks 521 through pins. One end of the bidirectional ball screw 524 is provided with a fourth motor 526. A blocking plate 53 is fixedly connected to the top of the end of the pressure plate 52 close to the screening box 1. The blocking plate 53 cooperates with the second discharge port 19, and the blocking plate 53 slidably penetrates through the hot pressing box 5. Two guide rods 525 are fixedly connected to the inner wall of the hot pressing box 5, and the moving plates 523 are respectively slidably connected to the two guide rods 525.

[0039] When the lifting mechanism provided by the present invention is in use, by starting the fourth motor 526, the output shaft is driven to rotate by the fourth motor 526, the bidirectional ball screw 524 is driven to rotate by the output shaft, the moving plates 523 are driven to move in opposite directions by the bidirectional ball screw 524, the top ends of the connecting plates 522 are driven to move by the moving plates 523. During the movement of the top ends of the connecting plates 522, rotation occurs at the same time. During the rotation process, the connecting blocks 521 are driven to move up and down, and the pressure plate 52 is driven to move up and down by the connecting blocks 521 until the small particle pulverized matter is hot pressed and formed. During the movement of the pressure plate 52, the pressure plate 52 drives the blocking plate 53 to move, and during the movement of the blocking plate 53, the blocking and circulation of the second discharge port 19 are realized.

[0040] As Figure 10As shown, the rotating mechanism includes a second gear 512 fixedly connected to one end of the rotating shaft; an electric push rod 514 is fixedly connected to the outer wall of the hot press box 5, and a rack 513 is fixedly connected to the output end of the electric push rod 514, and the rack 513 is engaged with the second gear 512; a push plate 515 is fixedly connected to the side wall of the rack 513, and a rectangular plate 517 is fixedly connected to the side wall of the hot press box 5, and two sliding rods 516 are fixedly connected to the rectangular plate 517, and the push plate 515 is slidably connected on the two sliding rods 516; a pressure sensor 511 is installed at the bottom of the rotating plate 51.

[0041] When the rotating mechanism provided by the present invention is in use, as a small particle crushed material of a certain weight is hot-pressed in the hot press box 5, when the weight reaches a set value, the pressure sensor 511 transmits the signal to the fourth motor 526 and the electric push rod 514, and the fourth motor 526 drives the sealing plate 53 to move, thereby blocking the second discharge port 19, and the electric push rod 514 drives the rack 513 to move, and the rack 513 drives the second gear 512 to rotate, and the second gear 512 drives the rotating shaft to rotate, thereby realizing the rotation of the rotating plate 51, which is convenient for the unloading of the formed plastic blocks.

[0042] like Figure 9 As shown, the linkage mechanism includes a first rotary wheel 527 fixed to the bidirectional ball screw 524; two first fixed plates 542 are fixed to the top of the hot press box 5, and the two first fixed plates 542 are rotatably connected to the first rotating rod 54, and the first rotating rod 54 is fixed to the second rotary wheel 541 and the third rotary wheel 543; a first belt 528 is sleeved between the second rotary wheel 541 and the first rotary wheel 527; two second fixed plates 55 are fixed to the top of the hot press box 5, and the two second fixed plates 55 are rotatably connected to the second rotating rod 551, and the second rotating rod 551 is fixed to the fourth rotary wheel 552 and the worm gear 553; a second belt 544 is sleeved between the fourth rotary wheel 552 and the third rotary wheel 543, and a worm 554 is fixed to the bottom of the rotating shaft 41, and the worm 554 is meshed with the worm gear 553.

[0043] When the linkage mechanism provided by the present invention is in use, during the rotation of the bidirectional ball screw 524, the first runner 527 is driven to rotate by the bidirectional ball screw 524, the first belt 528 is driven to rotate by the first runner 527, the second runner 541 is driven to rotate by the first belt 528, the first rotating rod 54 is driven to rotate by the second runner 541, the third runner 543 is driven to rotate by the first rotating rod 54, the second belt 544 is driven to rotate by the third runner 543, the fourth runner 552 is driven to rotate by the second belt 544, the second rotating rod 551 is driven to rotate by the fourth runner 552, the worm gear 553 is driven to rotate by the second rotating rod 551, the worm 554 is driven to rotate by the worm gear 553, and the rotating shaft 41 is driven to rotate by the worm 554, so as to realize the synchronous progress of conveying and hot pressing.

[0044] Working principle: By using special environmental protection equipment for comprehensive utilization of waste, waste plastics can be converted into new resources for the production of various plastic products, thereby reducing the demand for virgin plastics; however, when processing plastic waste by crushing, due to the light weight of plastics, the crushing tools may not be able to effectively crush the plastics, and the plastics may remain above the crushing tools all the time. Moreover, for larger plastics, it is also difficult to enter between the crushing tools and they cannot be crushed, thus affecting the efficiency of plastic crushing.

[0045] When the pressing mechanism provided by the present invention is in use, first, the waste plastic products are conveyed to the movable box 3 through the conveying cylinder 2, and then fall into the screening box 1 under the action of gravity. In the screening box 1, the driving roller shaft 11 rotates, and the roller shaft 11 drives the crushing roller 12 to rotate, so as to realize the crushing treatment of the waste plastic products. At the same time of crushing, the third motor 33 needs to be started. The output shaft of the third motor 33 drives the reciprocating screw rod 34 to rotate, and the reciprocating screw rod 34 drives the lower pressing plate 32 to move up and down reciprocally. The waste plastic products are pressed downward by the lower pressing plate 32. At the same time, the lower pressing plate 32 drives the scraper 37 to move downward. The scraper 37 moves towards the crushing roller 12. The crushing roller 12 crushes the plastic products. The waste plastic products are pressed downward by the lower pressing plate 32 to prevent them from staying on the crushing roller 12 all the time during crushing, which affects the crushing of the plastic products; among them, during the movement of the lower pressing plate 32, the lower pressing plate 32 slides on the vertical rod 35, and the vertical rod 35 limits the movement of the lower pressing plate 32 in the vertical direction.

[0046] After the plastic products are crushed by the crushing roller 12, the large-particle crushed materials are screened by the first screening basket 16, and then the large-particle crushed materials are crushed again; the large and small particle crushed materials are screened by the second screening basket 17, and then the small-particle crushed materials are hot-pressed; finally, some small-particle dust and part of the packaged water fall into the blanking hopper 110 through the second screening basket 17 for unified discharge. The large-particle crushed materials fall into the conveying cylinder 4 through the first discharge port 18, and then the driving rotating shaft 41 rotates. The rotating shaft 41 drives the spiral blade 42, and the spiral blade 42 drives the large-particle crushed materials to be conveyed upward until they reach the position of the arc blade 43. At this time, the rotating shaft 41 drives the arc blade 43 to move centrifugally, and the large-particle crushed materials are thrown above the crushing roller 12 through the diversion pipe by the arc blade 43, and then are crushed for the second time to improve the crushing effect. The small-particle crushed materials are screened and filtered by the second screening basket 17 and finally output into the hot-pressing box 5 through the second discharge port 19. By starting the fourth motor 526, the fourth motor 526 drives the output shaft to rotate, the output shaft drives the bidirectional ball screw 524 to rotate, the bidirectional ball screw 524 drives the moving plate 523 to move in the opposite direction, the moving plate 523 drives the top of the connecting plate 522 to move, and the top of the connecting plate 522 rotates during the movement. During the rotation, the connecting block 521 is driven to move up and down, and the connecting block 521 drives the pressure plate 52 to move up and down until the small-particle crushed materials are hot-pressed into shape. During the movement of the pressure plate 52, the pressure plate 52 drives the blocking plate 53 to move, and during the movement of the blocking plate 53, the blocking and circulation of the second discharge port 19 are realized. As a certain weight of small-particle crushed materials are hot-pressed into shape in the hot-pressing box 5, when the weight reaches the set value, the pressure sensor 511 transmits the signal to the fourth motor 526 and the electric push rod 514. The fourth motor 526 drives the blocking plate 53 to move to block the second discharge port 19, and the electric push rod 514 drives the rack 513 to move. The rack 513 drives the second gear 512 to rotate, and the second gear 512 drives the rotating shaft to rotate, so as to realize the rotation of the rotating plate 51, facilitating the blanking of the formed plastic block.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for recycling waste plastics, comprising a screening box (1); a crushing roller (12) is rotatably connected in the screening box (1) through a roller shaft (11), and a driving mechanism is provided at one end of the crushing roller (12); baffles (15) are symmetrically and fixedly connected to the inner wall of the top of the screening box (1); a movable box (3) is fixedly connected to the top of the two screening boxes (1); the baffles (15) are aligned with the bottom opening of the movable box (3); a downward pressing mechanism is provided in the movable box (3); characterized in that: The pressing mechanism includes a lower pressing plate (32). A plurality of scraping blades (37) are fixedly connected to the bottom of the lower pressing plate (32). The scraping blades (37) are arranged in two groups and are respectively matched with the crushing rollers (12). Two mounting plates (36) are fixedly connected to the inner wall of the movable box (3). Two vertical rods (35) are fixedly connected between the mounting plate (36) and the top inner wall of the movable box (3). The lower pressing plate (32) is slidably connected to the plurality of vertical rods (35). A third motor (33) is fixedly connected to the bottom of the movable box (3). The output shaft of the third motor (33) is rotatably connected to the movable box (3) through a bearing. The output shaft of the third motor (33) is fixedly connected with a reciprocating lead screw (34). The bottom of the reciprocating lead screw (34) is rotatably connected to the mounting plate (36) through a bearing. The lower pressing plate (32) is threadedly connected to the reciprocating lead screw (34). One end of the top of the lower pressing plate (32) is fixedly connected with a vertical plate (31). The vertical plate (31) is parallel to the direction of the scraping blade (37). The vertical plate (31) slidably penetrates through the movable box (3).

2. The waste plastic recycling and reuse device according to claim 1, wherein: A conveying cylinder (2) is fixedly connected to the outer wall of the movable box (3) close to the vertical plate (31). A second motor (21) is fixedly connected to one side wall of the conveying cylinder (2) far away from the movable box (3). One end of the conveying cylinder (2) close to the movable box (3) is communicated with the movable box (3). The output shaft of the second motor (21) is fixedly connected with an auger shaft (23). Auger blades (24) are fixedly connected to the auger shaft (23). A feeding hopper (22) is fixedly connected and communicated to the top of the conveying cylinder (2).

3. An apparatus for recycling waste plastics according to claim 2, characterized in that: The driving mechanism includes two first gears (13) fixedly connected to one end of the roller shaft (11). The two first gears (13) are meshed with each other. A first motor (14) is fixedly connected to the outer wall of the screening box (1). The output shaft of the first motor (14) is fixedly connected to the roller shaft (11).

4. The waste plastic recycling and reuse device according to claim 3, characterized in that: A first screening basket (16) and a second screening basket (17) are sequentially arranged in the screening box (1) from top to bottom. The screening holes of the first screening basket (16) are larger than those of the second screening basket (17). Vibration mechanisms are arranged on both the first screening basket (16) and the second screening basket (17). A blanking hopper (110) is fixedly connected to the bottom of the screening box (1).

5. The waste plastic recycling and reuse device according to claim 4, characterized in that: The vibration mechanism includes four side plates (161) fixedly connected to the side wall of the screening basket. Two sliding columns (162) are fixedly connected to the side plates (161). Springs (163) are sleeved on the outer sides of the bottom ends of the sliding columns (162). The bottoms of the springs (163) are fixedly connected to the side plates (161). The first screening basket (16) and the second screening basket (17) are respectively slidably connected to the sliding columns (162). Vibrators (164) are installed at the bottoms of both the first screening basket (16) and the second screening basket (17).

6. The waste plastic recycling and reuse device according to claim 5, characterized in that: A feeding cylinder (4) is fixedly connected to the side wall of the screening box (1); a first discharge port (18) is formed in the side wall of the screening box (1), and the first discharge port (18) is used to communicate the feeding cylinder (4) and the first screening basket (16); a rotating shaft (41) is rotatably connected in the feeding cylinder (4), an arc-shaped blade (43) is fixedly connected to the outer wall of the top end of the rotating shaft (41), a spiral blade (42) is arranged below the arc-shaped blade (43), and the spiral blade (42) is fixedly connected to the outer wall of the rotating shaft (41); the top end of the feeding cylinder (4) is communicated and fixedly connected with a guide pipe to the top of the screening box (1), and the guide pipe is flush with the height of the arc-shaped blade (43); a linkage mechanism is arranged at the bottom of the rotating shaft (41).

7. An apparatus for recycling waste plastics according to claim 6, characterized in that: A hot pressing box (5) is fixedly connected to the bottom side wall of the screening box (1), a second discharge port (19) is formed in the screening box (1), and the second discharge port (19) is used to communicate the hot pressing box (5) and the second discharge port (19); a pressure plate (52) is arranged on the inner wall of the top end of the hot pressing box (5), and a lifting mechanism is arranged on the top of the pressure plate (52); a rotating plate (51) is rotatably connected to the bottom end of the hot pressing box (5) through a rotating shaft, and a rotating mechanism is arranged at one end of the rotating plate (51); heating plates are respectively arranged at the bottom of the pressure plate (52) and the top of the rotating plate (51).

8. The waste plastic recycling and reuse device according to claim 7, wherein: The lifting mechanism includes a bidirectional ball screw (524) rotatably connected to the inner wall of the hot pressing box (5) through a bearing, two moving plates (523) are threadedly connected to the bidirectional ball screw (524), and the bottom of each moving plate (523) is rotatably connected to a connecting plate (522) through a pin shaft; two connecting blocks (521) are symmetrically and fixedly connected to the top of the pressure plate (52); the bottom of each connecting plate (522) is rotatably connected to the connecting block (521) through a pin shaft; a fourth motor (526) is arranged at one end of the bidirectional ball screw (524); a blocking plate (53) is fixedly connected to the top of one end of the pressure plate (52) close to the screening box (1), the blocking plate (53) cooperates with the second discharge port (19), and the blocking plate (53) slidably penetrates through the hot pressing box (5); two guide rods (525) are fixedly connected to the inner wall of the hot pressing box (5), and the moving plates (523) are both slidably connected to the two guide rods (525).

9. The waste plastic recycling and reuse device according to claim 8, characterized in that: The rotating mechanism includes a second gear (512) fixedly connected to one end of the rotating shaft; an electric push rod (514) is fixedly connected to the outer wall of the hot pressing box (5), a rack (513) is fixedly connected to the output end of the electric push rod (514), and the rack (513) meshes with the second gear (512); a push plate (515) is fixedly connected to the side wall of the rack (513), a rectangular plate (517) is fixedly connected to the side wall of the hot pressing box (5), and two sliding rods (516) are fixedly connected to the rectangular plate (517), and the push plate (515) is slidably connected to the two sliding rods (516); a pressure sensor (511) is installed at the bottom of the rotating plate (51).

10. The waste plastic recycling and reuse device according to claim 9, characterized in that: The linkage mechanism includes a first runner (527) fixedly connected to a bidirectional ball screw (524); two first fixing plates (542) are fixedly connected to the top of the hot pressing box (5), and a first rotating rod (54) is rotatably connected between the two first fixing plates (542). A second runner (541) and a third runner (543) are fixedly connected to the first rotating rod (54); a first belt (528) is sleeved between the second runner (541) and the first runner (527); two second fixing plates (55) are fixedly connected to the top of the hot pressing box (5), and a second rotating rod (551) is rotatably connected between the two second fixing plates (55). A fourth runner (552) and a worm gear (553) are fixedly connected to the second rotating rod (551); a second belt (544) is sleeved between the fourth runner (552) and the third runner (543). A worm (554) is fixedly connected to the bottom of the rotating shaft (41), and the worm (554) meshes with the worm gear (553).

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