Method for preparing plastic particles by recycling waste plastic

Abstract

The invention relates to the field of plastic processing, in particular to a method for preparing plastic particles by recycling waste plastic. A cleaning device for recycling waste plastics comprises a circular plate, four partition plates are fixed to the left side of the circular plate and divide the left side of the circular plate into four parts, a plurality of first strip holes are formed in the partition plates from left to right, and an inner plate is fixed to the left sides of the four partition plates. A cleaning device for recycling waste plastics and a method for preparing plastic particles from the recycled waste plastics comprise the following steps that S1, the waste plastics are fed into the cleaning device and fully cleaned with clear water, and loose dirt such as silt and dust attached to the surfaces of the waste plastics is removed; s2, an alkaline cleaning agent is added into the cleaning device, the PET plastic bottles are deeply cleaned, and stubborn stains and oil stains are removed; s3, rinsing the cleaned waste plastic for multiple times by using clear water to remove residual dirt; and S4, a centrifugal dehydrator is used for conducting dehydration treatment on the rinsed waste plastic, and surface moisture is removed.

Description

Technical Field

[0001] The invention relates to the field of plastic processing, and more particularly to a method for recycling waste plastics to prepare plastic particles. Background Art

[0002] With the widespread use of plastic products, the amount of waste plastics is also increasing. Traditional landfill and incineration treatment methods not only cause serious environmental pollution, but also waste precious petroleum resources. Therefore, it is of great significance to develop efficient and environmentally friendly waste plastic recycling and reuse technologies. Traditional cleaning methods are difficult to remove stubborn stains and oil stains on the surface of plastics, which affects the quality of recycled plastics. The present invention provides a method for recycling waste plastics to prepare plastic particles, which solves the problem that traditional cleaning methods are difficult to remove stubborn stains and oil stains on the surface of plastics. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a method for recycling waste plastics to prepare plastic particles, which has the beneficial effect of solving the problem that traditional cleaning methods are difficult to remove stubborn stains and oil stains on the plastic surface.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A cleaning device for recycling waste plastics comprises a circular plate, four partitions are fixed on the left side of the circular plate, the four partitions divide the left side of the circular plate into four parts, a plurality of strip holes are arranged on the partition from left to right, and an inner plate is fixed on the left side of the four partitions.

[0006] A square column is fixed on the left side of the inner plate, a slide cylinder is fixed at the center of the outer plate, the slide cylinder is slidably connected to the square column, a fastening screw is threadedly connected to the slide cylinder, a cylinder is fixed on the right side of the outer plate, four partition grooves are arranged on the cylinder, and four strip holes are respectively inserted into the four partition grooves.

[0007] A cleaning device for recycling waste plastics, a method for preparing plastic particles using recycled waste plastics, comprising the following steps:

[0008] S1: Send the waste plastics into the cleaning device and use clean water to fully clean them to remove loose dirt such as mud, dust, etc. attached to the surface;

[0009] S2: Add alkaline cleaning agent into the cleaning device to deeply clean the PET plastic bottles to remove stubborn stains and oil stains;

[0010] S3: Rinse the washed waste plastics several times with clean water to remove residual dirt;

[0011] S4: using a centrifugal dehydrator to dehydrate the rinsed waste plastic to remove surface moisture;

[0012] S5: Send the washed and dehydrated waste plastics into a crusher to be crushed into small pieces of uniform size;

[0013] S6: The crushed waste plastic is sent to a melting device and heated to 280°C to melt it into a liquid state;

[0014] S7: Filter the molten waste plastic using a filter to remove impurities and unmelted plastic particles;

[0015] S8: Extruding the filtered molten waste plastic into strips through an extruder;

[0016] S9: using an air cooling device to cool and shape the extruded plastic strip;

[0017] S10: Use a pelletizer to cut the cooled plastic strips into uniform pellets. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 A schematic diagram of the structure of a cleaning device for recycling waste plastics Figure 1 ;

[0020] Figure 2 A schematic diagram of the structure of a cleaning device for recycling waste plastics Figure 2 ;

[0021] Figure 3 A schematic diagram of the structure of a cleaning device for recycling waste plastics Figure 3 ;

[0022] Figure 4 The structure of the L-shaped frame Figure 1 ;

[0023] Figure 5 The structure of the L-shaped frame Figure 2 ;

[0024] Figure 6 Schematic diagram of the cylinder structure Figure 1 ;

[0025] Figure 7 Schematic diagram of the cylinder structure Figure 2 ;

[0026] Figure 8 The structure of the stand is shown in Figure 1. Figure 1 ;

[0027] Fig. 9 The structure of the stand is shown in Figure 1. Figure 2 ;

[0028] Fig.10 The structure of the water pusher Figure 1 ;

[0029] Fig.11 The structure of the water pusher Figure 2 ;

[0030] Fig.12 It is a schematic diagram of the structure of the diagonal rod, the side shaft and the rotating wheel.

[0031] In the figure: L-shaped frame 101; pulley 1 102; fixed shaft 103; pulley 2 104; circular plate 105; partition 106; square column 107; inner plate 108; strip hole 109; motor 110;

[0032] Cylinder 201; strip hole 202; partition groove 203; outer plate 204; slide cylinder 205; baffle cover 206; feed inlet 207;

[0033] Stand 301; lifting member 302; groove member 303; collecting tube 304; tray 305; rear frame 306; convex shaft 307; strip groove 308; sliding pin 309; base 310;

[0034] Water push plate 401; connecting column 402; side seat 403; bottom rod 404; bottom frame 405;

[0035] Oblique pressure rod 501; side shaft 502; rotating wheel 503. DETAILED DESCRIPTION

[0036] like Figure 4-5 As shown, this example can separate waste plastics through four spaces to prevent the waste plastics from piling up and becoming difficult to clean.

[0037] Since the cleaning device for recycling waste plastics includes a circular plate 105, four partitions 106 are welded on the left side of the circular plate 105, and the four partitions 106 divide the left side of the circular plate 105 into four parts. A plurality of strip holes 109 are arranged on the partition 106 from left to right, and an inner plate 108 is welded on the left side of the four partitions 106. The recycled waste plastics can be placed in the four spaces divided by the four partitions 106, and the waste plastics can be separated by the four spaces to prevent the waste plastics from piling up and being difficult to clean. The inner plate 108 and the circular plate 105 respectively block the left and right sides of the four spaces formed by the four partitions 106.

[0038] like Figure 4-7 As shown, this example can achieve the effect of facilitating the full contact between water and waste plastics to clean the waste plastics.

[0039] Since the square column 107 is welded on the left side of the inner plate 108, a slide 205 is fixed at the center of the outer plate 204, and the slide 205 is slidably connected to the square column 107. The slide 205 is threadedly connected with a fastening screw. A cylinder 201 is welded on the right side of the outer plate 204. Four partition grooves 203 are arranged on the cylinder 201. Four strip holes 109 are respectively inserted into the four partition grooves 203. A plurality of strip holes 202 are evenly distributed on the cylinder 201. The outer plate 204 can slide on the square column 107, thereby driving the cylinder 201 to slide left and right, so that the cylinder 201 moves to the right to cover the outside of the four spaces, thereby adjusting the four spaces. The outer side is closed, and the multiple strip holes 202 on the cylinder 201 and the multiple strip holes 109 on the partition 106 can facilitate water to pass through, thereby facilitating water to fully contact with the waste plastic to clean the waste plastic. When the cylinder 201 rotates with its own axis as the axis, the positions of the multiple strip holes 202 are constantly changing, making it easier for water to fully enter the interior of the cylinder 201 to flush the waste plastic, thereby achieving a better cleaning effect. The traditional cleaning method only puts the plastic into water for soaking and cleaning, and the water does not flush the plastic with enough force. This cleaning device solves the problem that the traditional cleaning method is difficult to remove stubborn stains and oil stains on the plastic surface. Rotating the fastening screws on the slide 205 can fix the slide 205 on the square column 107, thereby fixing the cylinder 201 and the outer plate 204 on the square column 107, thereby fixing the relative positions of the cylinder 201 and the four partitions 106.

[0040] like Figure 6-7 As shown, this example can achieve the effect of placing waste plastics into four spaces respectively.

[0041] Since four feed ports 207 are provided on the outer plate 204 , each feed port 207 is connected to a blocking cover 206 by screws. When the cylinder 201 covers the four spaces, waste plastics can be put into the four spaces respectively through the feed ports 207 , and the feed ports 207 can be closed by the blocking covers 206 .

[0042] like Figure 4-5 As shown, this example can achieve the effect of fully cleaning the waste plastics.

[0043] Since the right side of the circular plate 105 is connected to the fixed shaft 103 through a key, the right end of the fixed shaft 103 is connected to the pulley 2 104 through a key, the fixed shaft 103 is rotatably connected to the lower part of the L-shaped frame 101, the upper part of the L-shaped frame 101 is connected to the motor 110 through a screw, and the output shaft of the motor 110 is connected to the pulley 1 102, and the pulley 1 102 drives the pulley 2 104 to rotate through a belt, and the cylinder 201 is immersed in water, and the motor 110 drives the pulley 102 to rotate. When the pulley 102 rotates, the pulley 2 104 is driven to rotate through the belt, thereby driving the fixed shaft 103 and the circular plate 105 to rotate, and then driving the waste plastics in the four spaces formed by the four partitions 106 to continuously rotate in the water, so that the water continuously impacts the waste plastics, and the waste plastics are fully cleaned.

[0044] like Figure 4-9 As shown, this example can achieve the effect of lifting the drive cylinder 201 out of the water.

[0045] Since the upper part of the L-shaped frame 101 is hinged on the groove member 303, and the groove member 303 is welded to the upper part of the vertical frame 301, the upper part of the vertical frame 301 is vertically slidably connected with a lifting member 302, and the lifting member 302 can be pressed on the L-shaped frame 101. The lifting member 302 is driven to slide by a hydraulic cylinder, and the L-shaped frame 101 can rotate on the groove member 303, thereby driving the cylinder 201 to be lifted or immersed in water. When the lifting member 302 rises, it presses on the lower side of the L-shaped frame 101, driving the L-shaped frame 101 to rotate upward by ninety degrees, and the cylinder 201 follows the L-shaped frame 101 to rotate upward by ninety degrees, thereby driving the cylinder 201 to be lifted from the water. At this time, the cylinder 201 changes from a horizontal setting to a vertical setting.

[0046] like Figure 8-9 As shown, this example can achieve the effect of conveniently pouring out the waste plastics in the cylinder 201 after cleaning.

[0047] Since the lower end of the stand 301 is rotatably connected to the convex shaft 307, the convex shaft 307 is fixed on the base 310, and a strip groove 308 is provided at the lower end of the stand 301. A hydraulic cylinder is connected to the base 310 by screws. A sliding pin 309 is welded on the movable end of the hydraulic cylinder. The sliding pin 309 is inserted into the strip groove 308. When the sliding pin 309 moves left and right, the stand 301 is driven to rotate on the convex shaft 307. Then, when the cylinder 201 is lifted out of the water, the vertical cylinder 201 is driven to rotate clockwise with the convex shaft 307 as the axis, and then the cylinder 201 is rotated to the rear side, so that the waste plastic in the cylinder 201 can be poured out conveniently after cleaning.

[0048] like Figure 8-9 As shown, this example can achieve the effect of pouring the cleaned plastic into the collection tube 304.

[0049] Since the rear side of the stand 301 is welded with a rear frame 306, the upper part of the rear frame 306 is welded with a tray 305, and a collecting cylinder 304 is placed on the tray 305, and the upper part of the collecting cylinder 304 is an outward-expanding cone, when the cylinder 201 rotates to the rear side, the cylinder 201 is now located above the collecting cylinder 304, and the cylinder 201 is driven to move upward relative to the four partitions 106, and then the cleaned plastic can be poured into the collecting cylinder 304 and collected for preparation for the next step of processing. The upper part of the collecting cylinder 304 is an outward-expanding cone, which makes it more difficult for the plastic to spill.

[0050] like Figure 10-11 As shown, this example can achieve the effect of continuously pushing water into the cylinder 201 through two water pushing plates 401 .

[0051] Since water pushing plates 401 are provided on the front and rear sides of the cylinder 201, the lower ends of the two water pushing plates 401 are welded with connecting columns 402, and the two connecting columns 402 are fixed on the bottom rod 404. The front and rear ends of the bottom rod 404 are respectively slidably connected to the front and rear ends of the bottom frame 405, and the front and rear ends of the bottom rod 404 are welded with side seats 403. Each side seat 403 is welded with a compression spring, and the inner ends of the two compression springs are respectively welded to the front and rear sides of the bottom frame 405. The bottom frame 405 needs to be fixed in the cleaning container filled with water by screws. When the cylinder 201 is immersed in water, it is located between the two water pushing plates 401, and then the bottom rod 404 is pushed back and forth on the bottom frame 405 by a stick. The two compression springs help the bottom rod 404 return to its original position, so that the two water pushing plates 401 continue to move back and forth in the water, and then the water is continuously pushed into the cylinder 201 through the two water pushing plates 401, thereby further enhancing the impact effect of water and cleaning the waste plastic more quickly.

[0052] like Fig.12 As shown, this example can achieve the effect of automatically driving the two water pusher plates 401 to move forward and backward through the rotation of the cylinder 201 and the circular plate 105.

[0053] The right sides of the two water-pushing plates 401 are connected to the side shaft 502 through the bearing seat, and each side shaft 502 is connected to a rotating wheel 503 through a key. A diagonal pressure rod 501 is fixed to the right edge of the circular plate 105. When the circular plate 105, the partition plate 106 and the cylinder 201 rotate to between the two water-pushing plates 401, the circular plate 105 rotates with the fixed shaft 103 as the axis, thereby causing the diagonal pressure rod 501 to rotate with the fixed shaft 103 as the axis. When the diagonal pressure rod 501 rotates, it presses against the rotating wheel 503. 3, the oblique pressure rod 501 will alternately press the two rotating wheels 503. When the oblique pressure rod 501 presses the rotating wheels 503, it drives the water pushing plate 401 and the bottom rod 404 to slide along the bottom frame 405. When the oblique pressure rod 501 is separated from the rotating wheels 503, the two compression springs help the bottom rod 404 to return to its original position, and then the two water pushing plates 401 can be automatically driven to move forward and backward through the rotation of the cylinder 201 and the circular plate 105, and water is continuously pushed into the cylinder 201 through the two water pushing plates 401.

[0054] A cleaning device for recycling waste plastics, a method for preparing plastic particles using recycled waste plastics, comprising the following steps:

[0055] S1: Send the waste plastics into the cleaning device and use clean water to fully clean them to remove loose dirt such as mud, dust, etc. attached to the surface;

[0056] S2: Add alkaline cleaning agent into the cleaning device to deeply clean the PET plastic bottles to remove stubborn stains and oil stains;

[0057] S3: Rinse the washed waste plastics several times with clean water to remove residual dirt;

[0058] S4: using a centrifugal dehydrator to dehydrate the rinsed waste plastic to remove surface moisture;

[0059] S5: Send the washed and dehydrated waste plastics into a crusher to be crushed into small pieces of uniform size;

[0060] S6: The crushed waste plastic is sent to a melting device and heated to 280°C to melt it into a liquid state;

[0061] S7: Filter the molten waste plastic using a filter to remove impurities and unmelted plastic particles;

[0062] S8: Extruding the filtered molten waste plastic into strips through an extruder;

[0063] S9: using an air cooling device to cool and shape the extruded plastic strip;

[0064] S10: Use a pelletizer to cut the cooled plastic strips into uniform pellets.

Claims

1. A cleaning device for recycling waste plastics, comprising a circular plate (105), characterized in that: Four partitions (106) are fixed on the left side of the circular plate (105), and the four partitions (106) divide the left side of the circular plate (105) into four parts. A plurality of strip holes (109) are arranged on the partitions (106) from left to right, and an inner plate (108) is fixed on the left side of the four partitions (106).

2. A cleaning device for recycling waste plastics according to claim 1, characterized in that: A square column (107) is fixed on the left side of the inner plate (108), a slide cylinder (205) is fixed at the center of the outer plate (204), the slide cylinder (205) is slidably connected to the square column (107), a fastening screw is threadedly connected to the slide cylinder (205), a cylinder (201) is fixed on the right side of the outer plate (204), four partition grooves (203) are arranged on the cylinder (201), and four strip holes (109) are respectively inserted into the four partition grooves (203).

3. A cleaning device for recycling waste plastics according to claim 2, characterized in that: The cylinder (201) is evenly distributed with a plurality of second strip holes (202).

4. A cleaning device for recycling waste plastics according to claim 3, characterized in that: The outer plate (204) is provided with four material inlets (207), and each material inlet (207) is connected to a blocking cover (206) via screws.

5. A cleaning device for recycling waste plastics according to claim 4, characterized in that: A fixed shaft (103) is fixed on the right side of the circular plate (105), a second pulley (104) is fixed on the right end of the fixed shaft (103), the fixed shaft (103) is rotatably connected to the lower part of the L-shaped frame (101), a motor (110) is fixed on the upper part of the L-shaped frame (101), a first pulley (102) is fixed on the output shaft of the motor (110), and the first pulley (102) drives the second pulley (104) to rotate through a belt.

6. A cleaning device for recycling waste plastics according to claim 5, characterized in that: The upper part of the L-shaped frame (101) is hinged on the groove member (303), the groove member (303) is fixed on the upper part of the vertical frame (301), and the upper part of the vertical frame (301) is vertically slidably connected with a lifting member (302), which can be supported on the L-shaped frame (101), and the lifting member (302) is driven to slide by a hydraulic cylinder.

7. A cleaning device for recycling waste plastics according to claim 6, characterized in that: The lower end of the stand (301) is rotatably connected to a convex shaft (307), which is fixed to a base (310). A strip groove (308) is provided at the lower end of the stand (301), a hydraulic cylinder is fixed to the base (310), a sliding pin (309) is fixed to the movable end of the hydraulic cylinder, and the sliding pin (309) is inserted into the strip groove (308).

8. The cleaning device for recycling waste plastics according to claim 7, characterized in that: A rear frame (306) is fixed to the rear side of the vertical frame (301), a tray (305) is fixed to the upper part of the rear frame (306), a collecting tube (304) is placed on the tray (305), and the upper part of the collecting tube (304) is in an outwardly expanding cone shape.

9. A cleaning device for recycling waste plastics according to claim 8, characterized in that: The cylinder (201) is provided with water push plates (401) on both the front and rear sides, and the lower ends of the two water push plates (401) are fixed with connecting columns (402), and the two connecting columns (402) are fixed on the bottom rod (404). The front and rear ends of the bottom rod (404) are respectively slidably connected to the front and rear ends of the bottom frame (405), and the front and rear ends of the bottom rod (404) are fixed with side seats (403), and each side seat (403) is fixed with a compression spring, and the inner ends of the two compression springs are respectively fixed on the two connecting columns (402).

10. A method for preparing plastic particles using a cleaning device for recycling waste plastics according to claim 9, characterized in that: The following steps are involved: S1: Send the waste plastics into the cleaning device and use clean water to fully clean them to remove loose dirt such as mud, dust, etc. attached to the surface; S2: Add alkaline cleaning agent into the cleaning device to deeply clean the PET plastic bottles to remove stubborn stains and oil stains; S3: Rinse the washed waste plastics several times with clean water to remove residual dirt; S4: using a centrifugal dehydrator to dehydrate the rinsed waste plastic to remove surface moisture; S5: Send the washed and dehydrated waste plastics into a crusher to be crushed into small pieces of uniform size; S6: The crushed waste plastic is sent to a melting device and heated to 280°C to melt it into a liquid state; S7: Filter the molten waste plastic using a filter to remove impurities and unmelted plastic particles; S8: Extruding the filtered molten waste plastic into strips through an extruder; S9: using an air cooling device to cool and shape the extruded plastic strip; S10: Use a pelletizer to cut the cooled plastic strips into uniform pellets.

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