A method for preparing plastic bottles using waste plastics

Abstract

The application discloses a method for preparing plastic bottles by using waste plastics, and specifically comprises the following steps: S1, cleaning and drying: firstly, sorting the recycled plastic bottles, then cleaning the impurities and oil stains on the outer surface of the plastic bottles through a cleaning device or a spraying device, and then drying the water stains on the surface of the plastic bottles through a drying device; S2, label removal: adding the cleaned and dried plastic bottles into a hopper, making them fall into a material conveying pipe, and pushing them with a sliding column, which relates to the plastic recycling technical field and solves the problem that, in the existing waste plastic bottle recycling process, since the plastic bottles are first crushed and then the fragments are cleaned, the bottle fragments, label fragments and impurities are easily mixed with each other, the respective screening is inconvenient, the separate treatment of the materials is inconvenient, and the subsequent plastic bottle production forming and forming quality are affected.

Description

Technical Field

[0001] This invention relates to the field of plastic recycling technology, specifically a method for preparing plastic bottles from waste plastics. Background Technology

[0002] A large amount of waste plastic bottles are generated during production and daily life. In order to save energy, protect the environment, and reduce manufacturing costs, waste plastic bottles are recycled and reprocessed. CN102773944A discloses a waste plastic bottle recycling and processing technology, which includes the following steps: sorting the collected waste plastic bottles; placing the sorted bottles into a shredder for shredding; and then filtering the shredded plastic bottle pieces using a vibrating screen. CN107287764A discloses a method for preparing non-woven fabric from waste plastic bottles, which includes the following steps: cutting the plastic bottles into fragments, removing dirt and oil, and then placing them in warm water.

[0003] While both processes have their own advantages, they share a common drawback in actual production: directly crushing recycled plastic bottles and then washing the resulting fragments. Firstly, the small, flat plastic fragments easily pile up and become mixed with fine impurities, making complete cleaning difficult and affecting subsequent extrusion molding and the quality of the molded plastic bottles. Secondly, crushing the bottle body and labels together results in labels easily becoming mixed with bottle fragments, making complete cleaning difficult and hindering separation. Furthermore, the crushed labels tend to pile up, which can clog the screening equipment when using a water flotation method, preventing water from circulating properly. Therefore, solutions to these problems are needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method for preparing plastic bottles from waste plastics. This method solves the problem that in existing waste plastic bottle recycling processes, the plastic bottles are first crushed, and then the fragments are cleaned up. This process easily leads to the mixing of bottle fragments, label fragments, and impurities, making it difficult to separate them and thus hindering the individual processing of materials. Consequently, this affects the subsequent production and molding of plastic bottles and the quality of the molding process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing plastic bottles from waste plastics, specifically comprising the following steps:

[0006] S1. Cleaning and Drying: First, the recycled plastic bottles are sorted. Then, the impurities and oil stains on the outer surface of the plastic bottles are cleaned by cleaning equipment or spraying equipment. Finally, the water stains on the surface of the plastic bottles are dried by drying equipment.

[0007] S2, Label Removal: The cleaned and dried plastic bottle is added into the hopper and falls into the conveying pipe. With the push of the slide column, the plastic bottle enters the slide pipe in the same direction through the feed pipe and the spiral pipe. Then, the baffle and the arc strip clamp and limit the plastic bottle. The clamping strip clamps the label tape. At the same time, the belt moves and contacts the bottle cap. The rotation of the belt drives the plastic bottle to rotate, so that the label tape is rubbed off and collected through the suction pipe. Then the belt reverses and loosens the bottle cap. Then the baffle and the arc strip release the limit on the plastic bottle. The plastic bottle falls into the external crushing equipment through the slide pipe.

[0008] S3. Crushing and Injection Molding: The crushing equipment flattens and crushes the plastic bottles after the labels have been removed. The plastic bottle fragments are then added into the injection molding machine, where they are extruded by a spiral extrusion and molded to produce new plastic bottles.

[0009] Preferably, the slide tube is divided into three sections. The middle slide tube is fixedly connected to the two side slide tubes by two fixed frames. A pressure relief assembly and a feeding assembly are respectively provided on the outside of one side slide tube. The pressure relief assembly includes a connecting plate. The outer surface of the connecting plate is fixedly connected to the outer surface of the fixed frame on one side by a lifting rod. A belt is provided on the outside of the connecting plate. The belt is located between the two slide tubes. A limit assembly and a material feeding assembly are respectively provided on one side of the belt. Both sides of the outer surface of the belt are drivenly connected to a wheel. The shaft end of the wheel is rotatably connected to a support plate. The outer surface of the support plate is fixedly connected to the outer surface of the connecting plate. A servo motor is fixedly connected to the outer surface of one side support plate. The output end of the servo motor is rotatably connected to the body of the support plate on one side. The output end of the servo motor is fixedly connected to the shaft end of one side of the wheel by a coupling.

[0010] Preferably, the limiting component includes a baffle that moves between two sliding tubes. The outer surface of the baffle is fixedly connected to the outer surface of the other side of the fixed frame via a push-pull rod. The baffle body has a through-hole rotating groove, and a rotating plate is movably connected inside the rotating groove. A limiting groove is formed on the outer surface of the rotating plate, and a limiting ring is movably connected inside the limiting groove. The outer surface of the limiting ring is fixedly connected to the inside of the rotating groove.

[0011] Preferably, an electric push rod is fixedly connected to the outer surface of the baffle, and a locking block is movably connected through the body of the output end of the electric push rod. The outer surface of the locking block is fixedly connected to the outer surface of the rotating plate. A transverse groove is formed on the outer surface of the rotating plate, and a slide rail is fixedly connected inside the transverse groove. Slider blocks are slidably connected to both sides of the outer surface of the slide rail. The slider blocks slide inside the transverse groove. An arc strip is fixedly connected to the outer surface of the slider blocks, and the outer surface of the arc strip is movably connected to the outer surface of the baffle.

[0012] Preferably, the material feeding assembly includes a connecting frame and a suction pipe. The interior of the suction pipe is in through communication with the interior of a side slide pipe. The outer surface of the connecting frame is fixedly connected to the outer surface of the side slide pipe via a telescopic rod. A cutter is fixedly connected to the outer surface of the connecting frame. The outer surface of the cutter is movably connected to the body of the side slide pipe. Two mutually fitting triangular plates are provided on the outside of the connecting frame. The outer surface of one of the triangular plates is fixedly connected to the outer surface of the connecting frame.

[0013] Preferably, a horizontal plate is fixedly connected to the outer surface of the triangular plate on the other side. The outer surface of the horizontal plate is fixedly connected to the outer surface of the slide tube on one side via a spring rod. A connecting rod is fixedly connected to the outer surface of the horizontal plate. A clamping strip is fixedly connected to the outer surface of the connecting rod. The outer surfaces of the clamping strip and the connecting rod are both movably connected to the body of the slide tube on one side.

[0014] Preferably, the feeding assembly includes a conveying pipe, the inside of which is connected to a hopper, and the two sides inside the conveying pipe are respectively connected to a discharge pipe and a spiral pipe. The inside of the spiral pipe and the discharge pipe are both connected to the inside of a sliding pipe, and a sliding column is slidably connected inside the conveying pipe.

[0015] Preferably, a drive motor is fixedly connected to the outer surface of the conveying pipe, a circular plate is fixedly connected to the output end of the drive motor, a rotating bar is movably connected to the outer surface of the circular plate, and pins are rotatably connected through both sides of the rotating bar body. The outer surface of one side of the pin is fixedly connected to the outer surface of the circular plate, and the outer surface of the other side of the pin is fixedly connected to the outer surface of the sliding column.

[0016] Beneficial effects

[0017] This invention provides a method for preparing plastic bottles from waste plastics. Compared with existing technologies, it has the following advantages:

[0018] (1) By setting up a pressure relief component, the output end of the lifting rod first extends and retracts along the axis, thereby driving the belt to move through the connecting plate, so that one side of the belt contacts the plastic bottle cap. First, the belt rotates in the same direction as the bottle cap spiral, driving the bottle body to rotate and detaching the label from the bottle body. Second, the belt rotates in the opposite direction, driving the bottle cap to rotate, thereby detaching the bottle cap from the bottle body and making it tightly connected. This facilitates the subsequent flattening of the bottle body and the outflow of internal air, thus making it easier to crush and recycle the plastic bottle and extrude it.

[0019] (2) By setting a limiting component, the bottom of the bottle first contacts the rotating plate, and the bottle body is clamped by the arc strips on both sides, so that the plastic bottle body and the rotating plate are fixed together, so that the bottle body can rotate steadily along the radial direction of the rotating plate, thus making it easy to remove the label. At the same time, the rotating plate is radially limited by the connection between the output end of the electric push rod and the card block, so that the bottle body cannot rotate, so that the bottle cap can be rotated to release the bottle mouth seal.

[0020] (3) By setting up a material rubbing assembly, the output end of the telescopic rod retracts, and the cutter is driven into the slide tube through the connecting frame, so that the cutter contacts the label and cuts it. At the same time, as the bottle rotates, the cutter can easily lift the label and detach it from the bottle. Meanwhile, the connecting frame, through the squeezing between the triangular plates, causes the horizontal plates on both sides and the connecting rod to drive the clamping strip into the slide tube and clamp the bottle through the label. This facilitates the stable rotation of the bottle and makes it easier to rub off the label.

[0021] (4) By setting up a feeding assembly, the hopper adds clean plastic bottles into the conveying pipe through the discharge end. At the same time, the circular plate rotates and drives the sliding column through the rotating bar to slide back and forth inside the conveying pipe, thereby pushing the plastic bottles to move inside the conveying pipe. Meanwhile, the plastic bottles can fall into the sliding tube for conveying and processing through the discharge pipe and the spiral tube. At the same time, the middle part of the spiral tube is set to rotate 180°, so that the plastic bottles entering the sliding tube are in the same direction as the plastic bottles entering the sliding tube through the discharge pipe, which facilitates the uniform processing of labels. Attached Figure Description

[0022] Figure 1 This is a perspective view of the external structure of the present invention;

[0023] Figure 2 This is a perspective view of the external structure of the sliding column of the present invention;

[0024] Figure 3 This is a perspective view of the external structure of the slide tube of the present invention;

[0025] Figure 4 This is a perspective view of the external structure of the belt of the present invention;

[0026] Figure 5 This is a perspective view of the external structure of the baffle of the present invention;

[0027] Figure 6 This is an exploded view of the external structure of the baffle of the present invention;

[0028] Figure 7 This is a perspective view of the external structure of the connecting frame of the present invention.

[0029] In the diagram: 1. Sliding tube; 2. Fixed frame; 3. Pressure relief assembly; 31. Connecting plate; 32. Lifting rod; 33. Belt; 34. Rotary wheel; 35. Support plate; 36. Servo motor; 4. Feeding assembly; 41. Conveying pipe; 42. Hopper; 43. Discharge pipe; 44. Spiral tube; 45. Sliding column; 46. Drive motor; 47. Circular plate; 48. Rotary bar; 49. Pin; 5. Limiting assembly; 51. Baffle; 52. Push-pull rod; 53. Rotary groove; 54. Rotating plate; 55. Limiting groove; 56. Limiting ring; 57. Electric push rod; 58. Locking block; 59. Horizontal groove; 510. Slide rail; 511. Slider; 512. Arc strip; 6. Material feeding assembly; 61. Connecting frame; 62. Telescopic rod; 63. Cutter; 64. Triangular plate; 65. Horizontal plate; 66. Spring rod; 67. Connecting rod; 68. Clamping bar; 69. Suction pipe. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-7 This invention provides a technical solution: a method for preparing plastic bottles using waste plastics.

[0032] Example 1:

[0033] Reference manual attached Figure 1-7 Specifically, it includes the following steps:

[0034] S1. Cleaning and Drying: First, the recycled plastic bottles are sorted. Then, the impurities and oil stains on the outer surface of the plastic bottles are cleaned by cleaning equipment or spraying equipment. Finally, the water stains on the surface of the plastic bottles are dried by drying equipment.

[0035] S2, Label Removal: The cleaned and dried plastic bottle is added to the hopper 42. A vibrating motor drives the hopper 42 to vibrate, causing the plastic bottle to fall into the conveying pipe 41. Simultaneously, the drive motor 46 rotates the circular plate 47. Through the cooperation of the rotating bar 48 and the pin 49, the sliding column 45 slides back and forth inside the conveying pipe 41, pushing the plastic bottle along the pipe. With the pushing of the sliding column 45, the plastic bottle enters the slide tube 1 in the same direction through the discharge pipe 43 and the spiral tube 44. Due to the sliding tube... 1. The plastic bottle is tilted and slides down inside the slide tube 1 by gravity potential energy. Then, the baffle 51 and the arc strip 512 clamp and limit the plastic bottle. The clamping strip 68 clamps the label tape. At the same time, the belt 33 moves and contacts the bottle cap. The rotation of the belt 33 drives the plastic bottle to rotate, so that the label tape is rubbed off and collected through the suction pipe 69. Then the belt 33 reverses and causes the bottle cap to loosen. Then the baffle 51 and the arc strip 512 disengage from limiting the plastic bottle. The plastic bottle falls into the external crushing equipment through the slide tube 1.

[0036] S3. Crushing and Injection Molding: The crushing equipment flattens and crushes the plastic bottles after the labels have been removed. The plastic bottle fragments are then added into the injection molding machine, where they are extruded by a spiral extrusion and molded to produce new plastic bottles.

[0037] Example 2:

[0038] Based on Example 1, please refer to the appendix of the instruction manual. Figure 1 Appendix Figure 3 Appendix Figure 4The slide tube 1 is divided into three sections. One end of the outermost slide tube 1 is connected to the feed end of the external crushing equipment. The middle slide tube 1 is fixedly connected to the two side slide tubes 1 through two fixed frames 2. A pressure relief component 3 and a feeding component 4 are respectively installed on the outside of one side slide tube 1. The pressure relief component 3 includes a connecting plate 31, which is made of a pressure-resistant material. The outer surface of the connecting plate 31 is fixedly connected to the outer surface of the fixed frame 2 on one side through a lifting rod 32. The lifting rod 32 is an existing hydraulic rod and is connected to an external control cylinder. A belt 33 is installed on the outside of the connecting plate 31. The belt 33 is made of a pressure-resistant, tensile-resistant, wear-resistant and friction-resistant material. The distance between the two sides of the belt 33 is greater than or equal to the inner diameter of the slide tube 1. The belt 33 is located between the two side slide tubes 1. A limit component 5 and a material rubbing component 6 are respectively installed on one side of the belt 33. Both sides of the outer surface of the belt 33 are connected to a rotating wheel 34. The shaft end of the rotating wheel 34 is rotatably connected to a support plate. 35. The support plate 35 is made of pressure-resistant and wear-resistant material. The outer surface of the support plate 35 is fixedly connected to the outer surface of the connecting plate 31. A servo motor 36 is fixedly connected to the outer surface of one side of the support plate 35. The servo motor 36 is electrically connected to the external control circuit. The output end of the servo motor 36 is rotatably connected to the body of the support plate 35. The output end of the servo motor 36 is fixedly connected to the shaft end of the rotating wheel 34 through a coupling. By setting the pressure relief component 3, the output end of the lifting rod 32 first extends and retracts along the axis, thereby driving the belt 33 to move through the connecting plate 31, so that one side of the belt 33 contacts the plastic bottle cap. First, the belt 33 rotates in the same direction as the bottle cap spiral, driving the bottle body to rotate and detaching the label from the bottle body. Second, the belt 33 rotates in the opposite direction, driving the bottle cap to rotate, thereby detaching the bottle cap from the bottle body and making it tightly connected. This facilitates the subsequent flattening of the bottle body and the outflow of internal air, thus facilitating the crushing, recycling, and extrusion molding of the plastic bottle.

[0039] Example 3:

[0040] Based on Embodiment 2, please refer to the accompanying drawings in the instruction manual. Figure 1 Appendix Figure 3 Appendix Figure 5 Appendix Figure 6The limiting component 5 includes a baffle 51, which is made of a pressure-resistant and wear-resistant material. The baffle 51 moves between the two sliding tubes 1. The outer surface of the baffle 51 is fixedly connected to the outer surface of the other side bracket 2 via a push-pull rod 52. The push-pull rod 52 is an existing hydraulic rod and is connected to an external control cylinder. The body of the baffle 51 has a through-hole rotating groove 53. A rotating plate 54 is movably connected inside the rotating groove 53. The rotating plate 54 is made of a pressure-resistant and wear-resistant material. The outer surface of the rotating plate 54... A limiting groove 55 is provided, and a limiting ring 56 is movably connected inside the limiting groove 55. The limiting ring 56 is made of a pressure-resistant and wear-resistant material. The outer surface of the limiting ring 56 is fixedly connected to the inside of the rotating groove 53. An electric push rod 57 is fixedly connected to the outer surface of the baffle 51. The electric push rod 57 is electrically connected to an external control circuit. A locking block 58 is movably connected through the body of the output end of the electric push rod 57. The locking block 58 is made of a pressure-resistant and wear-resistant material. The outer surface of the locking block 58 is fixedly connected to the outer surface of the rotating plate 54. A transverse groove 59 is provided on the outer surface of the rotating plate 54. A slide rail 510 is fixedly connected inside the transverse groove 59. Slider 511 is slidably connected to both sides of the outer surface of the slide rail 510. The slider 511 is an existing linear motor with a self-locking function and is electrically connected to an external control circuit. The slider 511 slides inside the transverse groove 59. An arc strip 512 is fixedly connected to the outer surface of the slider 511. The arc strip 512 is made of a pressure-resistant, wear-resistant and friction-resistant material. The outer surface of the bottle is movably connected to the outer surface of the baffle 51. By setting the limiting component 5, the bottom of the bottle first contacts the rotating plate 54, and the bottle body is clamped by the arc strips 512 on both sides, so that the plastic bottle body and the rotating plate 54 are fixed together, so that the bottle body can rotate steadily along the radial direction of the rotating plate 54, thereby facilitating the removal of the label. At the same time, the output end of the electric push rod 57 is engaged with the locking block 58 to radially limit the rotating plate 54, so that the bottle body cannot rotate, so that the bottle cap can be rotated to release the bottle mouth seal.

[0041] Example 4:

[0042] Based on Example 3, please refer to the appendix of the instruction manual. Figure 1 Appendix Figure 3 Appendix Figure 7The material feeding assembly 6 includes a connecting frame 61 and a suction pipe 69. One end of the suction pipe 69 is connected to an external negative pressure device, and the interior of the suction pipe 69 is in continuous communication with the interior of one side slide pipe 1. The outer surface of the connecting frame 61 is fixedly connected to the outer surface of one side slide pipe 1 via a telescopic rod 62. A cutter 63 is fixedly connected to the outer surface of the connecting frame 61. The cutter 63 is made of a pressure-resistant and wear-resistant material, and its cutting edge is set with a certain arc to facilitate lifting the label. The outer surface of the cutter 63 is movably connected to the body of one side slide pipe 1. Two mutually fitting triangular plates 64 are provided on the outside of the connecting frame 61. The triangular plates 64 are made of a pressure-resistant and wear-resistant material. The outer surface of one triangular plate 64 is fixedly connected to the outer surface of the connecting frame 61, and the outer surface of the other triangular plate 64 is fixedly connected to a horizontal plate 65. The outer surface of the horizontal plate 65 is fixedly connected to the outer surface of one side slide pipe 1 via a spring rod 66. The rod 66 is made of a material with good elasticity, pressure resistance, and fatigue resistance. A connecting rod 67 is fixedly connected to the outer surface of the horizontal plate 65. A clamping strip 68 is fixedly connected to the outer surface of the connecting rod 67. The clamping strip 68 is made of a material with good pressure resistance, wear resistance, and friction. The outer surfaces of the clamping strip 68 and the connecting rod 67 are movably connected to the body of the slide tube 1 on one side. By setting the material rubbing assembly 6, the output end of the telescopic rod 62 retracts. The cutter 63 is driven into the slide tube 1 through the connecting frame 61, so that the cutter 63 contacts the label and cuts it. At the same time, as the bottle rotates, the cutter 63 can easily lift the label and detach it from the bottle. At the same time, the connecting frame 61, through the squeezing between the triangular plates 64, causes the horizontal plates 65 on both sides and the connecting rod 67 to drive the clamping strip 68 into the slide tube 1 and clamp the bottle through the label. This facilitates the stable rotation of the bottle and makes it easier to rub off the label.

[0043] Example 5:

[0044] Based on Example 4, please refer to the appendix of the instruction manual. Figure 1 Appendix Figure 2The feeding assembly 4 includes a conveying pipe 41, through which a hopper 42 is connected. A vibrating motor (not shown) is installed on the hopper 42 to facilitate material discharge. The internal dimensions of the discharge end of the hopper 42 are the same as the length and width of the plastic bottle. Drying and cleaning equipment are respectively installed on the outside of the hopper 42. A discharge pipe 43 and a spiral pipe 44 are respectively connected through the two sides of the inside of the conveying pipe 41. The internal dimensions of the discharge pipe 43 and the spiral pipe 44 are adapted to the size of the plastic bottle. The spiral pipe 44 can change the orientation of the bottle opening by rotating 180°. The interiors of the spiral pipe 44 and the discharge pipe 43 are both connected through the interior of the sliding pipe 1. A sliding column 45 is slidably connected inside the conveying pipe 41. The sliding column 45 is made of a pressure-resistant and wear-resistant material. A drive motor 46 is fixedly connected to the outer surface of the conveying pipe 41. The drive motor 46 is electrically connected to an external control circuit. A circular plate 47 is fixedly connected to the output end of the drive motor 46. The circular plate 47 is made of a pressure-resistant and wear-resistant material. Made of wear-resistant material, the outer surface of the circular plate 47 is movably connected to a rotating bar 48. Both sides of the rotating bar 48 are rotatably connected to pins 49. Both the rotating bar 48 and the pins 49 are made of pressure-resistant and wear-resistant material. The outer surface of one pin 49 is fixedly connected to the outer surface of the circular plate 47, and the outer surface of the other pin 49 is fixedly connected to the outer surface of the sliding column 45. By setting the feeding assembly 4, the hopper 42 adds clean plastic bottles into the conveying pipe 41 through the discharge end. At the same time, the circular plate 47 rotates and drives the sliding column 45 through the rotating bar 48 to slide back and forth inside the conveying pipe 41, thereby pushing the plastic bottles to move inside the conveying pipe 41. Meanwhile, the plastic bottles can fall into the sliding tube 1 for conveying and processing through the discharge pipe 43 and the spiral tube 44. At the same time, the middle part of the spiral tube 44 is set to rotate 180°, so that the plastic bottles entering the sliding tube 1 are in the same direction as the plastic bottles entering the sliding tube 1 through the discharge pipe 43, which facilitates the uniform processing of labels.

[0045] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing plastic bottles from waste plastics, characterized in that: Specifically, the following steps are included: S1. Cleaning and Drying: First, the recycled plastic bottles are sorted. Then, the impurities and oil stains on the outer surface of the plastic bottles are cleaned by cleaning equipment or spraying equipment. Finally, the water stains on the surface of the plastic bottles are dried by drying equipment. S2, Label Removal: The cleaned and dried plastic bottle is added into the hopper (42) and falls into the conveying pipe (41). With the push of the slide column (45), the plastic bottle enters the slide tube (1) in the same direction through the discharge pipe (43) and the spiral pipe (44). Then the baffle (51) and the arc strip (512) clamp and limit the plastic bottle, and the clamping strip (68) clamps the label tape. At the same time, the belt (33) moves and contacts the bottle cap. The plastic bottle is rotated by the rotation of the belt (33), so that the label tape is rubbed off and collected through the suction pipe (69). Then the belt (33) reverses and causes the bottle cap to loosen. Then the baffle (51) and the arc strip (512) are released from limiting the plastic bottle, and the plastic bottle falls into the external crushing equipment through the slide tube (1). S3. Crushing and Injection Molding: The crushing equipment flattens and crushes the plastic bottles after the labels have been removed, and then adds the plastic bottle fragments into the injection molding machine. Through spiral extrusion and mold cooperation, new plastic bottles are produced. A limit assembly (5) and a feeding assembly (6) are respectively provided on one side of the belt (33): The limiting component (5) includes a baffle (51), which moves between two sliding tubes (1). The outer surface of the baffle (51) is fixedly connected to the outer surface of the other side bracket (2) via a push-pull rod (52). The body of the baffle (51) has a through-hole rotating groove (53). A rotating plate (54) is movably connected inside the rotating groove (53). A limiting groove (55) is opened on the outer surface of the rotating plate (54). A limiting ring (56) is movably connected inside the limiting groove (55). The outer surface of the limiting ring (56) is fixedly connected to the inside of the rotating groove (53). An electric push rod (57) is fixedly connected to the outer surface of the baffle (51). A locking block (58) is movably connected through the body of the output end of the electric push rod (57). The outer surface of the locking block (58) is fixedly connected to the outer surface of the rotating plate (54). A transverse groove (59) is provided on the outer surface of the rotating plate (54). A slide rail (510) is fixedly connected inside the transverse groove (59). A slider (511) is slidably connected to both sides of the outer surface of the slide rail (510). The slider (511) slides inside the transverse groove (59). An arc strip (512) is fixedly connected to the outer surface of the slider (511). The outer surface of the arc strip (512) is movably connected to the outer surface of the baffle (51). The material rolling assembly (6) includes a connecting frame (61) and a suction pipe (69). The interior of the suction pipe (69) is connected to the interior of a side slide pipe (1). The outer surface of the connecting frame (61) is fixedly connected to the outer surface of the side slide pipe (1) via a telescopic rod (62). A cutter (63) is fixedly connected to the outer surface of the connecting frame (61). The outer surface of the cutter (63) is movably connected to the body of the side slide pipe (1). Two mutually fitting triangular plates (64) are provided on the outside of the connecting frame (61). The outer surface of one side of the triangular plate (64) is fixedly connected to the outer surface of the connecting frame (61). A horizontal plate (65) is fixedly connected to the outer surface of the triangular plate (64) on the other side. The outer surface of the horizontal plate (65) is fixedly connected to the outer surface of the slide tube (1) on one side through a spring rod (66). A connecting rod (67) is fixedly connected to the outer surface of the horizontal plate (65). A clamping strip (68) is fixedly connected to the outer surface of the connecting rod (67). The outer surfaces of the clamping strip (68) and the connecting rod (67) are both movably connected to the body of the slide tube (1) on one side.

2. The method for preparing plastic bottles from waste plastics according to claim 1, characterized in that: The slide tube (1) is divided into three sections. The middle slide tube (1) is fixedly connected to the two side slide tubes (1) by two fixed frames (2). A pressure relief assembly (3) and a feeding assembly (4) are respectively provided on the outside of one side slide tube (1). The pressure relief assembly (3) includes a connecting plate (31). The outer surface of the connecting plate (31) is fixedly connected to the outer surface of the fixed frame (2) on one side by a lifting rod (32). A belt (33) is provided on the outside of the connecting plate (31). The belt (33) is located between the two side slide tubes (1). Both sides of the outer surface of the belt (33) are connected to a pulley (34). The shaft end of the pulley (34) is rotatably connected to a support plate (35). The outer surface of the support plate (35) is fixedly connected to the outer surface of the connecting plate (31). A servo motor (36) is fixedly connected to the outer surface of one side of the support plate (35). The output end of the servo motor (36) is rotatably connected to the body of the support plate (35) on one side. The output end of the servo motor (36) is fixedly connected to the shaft end of one side of the pulley (34) through a coupling.

3. The method for preparing plastic bottles from waste plastics according to claim 2, characterized in that: The feeding assembly (4) includes a conveying pipe (41), a hopper (42) is connected through the inside of the conveying pipe (41), a discharge pipe (43) and a spiral pipe (44) are connected through the two sides of the inside of the conveying pipe (41), the inside of the spiral pipe (44) and the discharge pipe (43) are both connected through the inside of the slide pipe (1), and a sliding column (45) is slidably connected inside the conveying pipe (41).

4. The method for preparing plastic bottles from waste plastics according to claim 3, characterized in that: A drive motor (46) is fixedly connected to the outer surface of the conveying pipe (41). A circular plate (47) is fixedly connected to the output end of the drive motor (46). A rotating bar (48) is movably connected to the outer surface of the circular plate (47). Pins (49) are rotatably connected through both sides of the rotating bar (48). The outer surface of one side of the pin (49) is fixedly connected to the outer surface of the circular plate (47), and the outer surface of the other side of the pin (49) is fixedly connected to the outer surface of the sliding column (45).

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