A waste plastic crusher

Abstract

The utility model provides a kind of waste plastics crusher, including crushing box, pre-pressing assembly is arranged on the crushing box, the pre-pressing assembly includes guide chute, pre-pressing motor, two sliding seats, driven pre-pressing roller, driving pre-pressing roller, pressure adjusting rod, adjusting nut and motor base;The driven pre-pressing roller is rotatably installed in the inside of guide chute by bearing.Relative to prior art, the utility model can realize the pre-flattening operation of waste plastic bottle by setting pre-pressing assembly, and the flattened plastic bottle does not appear the condition of rolling skid when crushing, and then improve the crushing efficiency, and by the cooperation of pre-pressing spring, adjusting nut and other structures, the pre-pressing force can be adjusted to meet different use requirements, at the same time, driving pre-pressing roller adopts movable design, when plastic bottle is stacked and enters, gap can be automatically enlarged, and it is automatically reset when stacking reduces, to ensure continuous pressing force.

Description

Technical Field

[0001] This utility model relates to a crusher, specifically a waste plastic crusher, belonging to the field of plastic recycling technology. Background Technology

[0002] The core objectives of waste plastic recycling are twofold: first, to alleviate environmental pressure and reduce "white pollution"; and second, to achieve resource recycling, aligning with the needs of sustainable development. When recycling waste plastic bottles, it is generally recommended to recycle them separately or in categories. This is because plastic bottles are mostly made of PET (polyethylene terephthalate), which is relatively pure and has a regular shape. Recycling them separately can prevent them from being mixed with plastics of other materials (such as PP polypropylene and PVC polyvinyl chloride), reducing the cost and difficulty of subsequent sorting processes and improving recycling efficiency and purity.

[0003] In the recycling process of waste plastic bottles, plastic crushers are one of the indispensable core equipment. They are used to efficiently crush the recycled waste plastic bottles, transforming the originally irregularly shaped bottles into crushed materials that are easy to transport, clean and recycle. These crushed plastic materials are then further recycled to achieve resource recycling.

[0004] Current waste plastic shredders often encounter slippage when crushing cylindrical plastic bottles between the two crushing rollers. This is because the cylindrical bottle has a regular circular structure, resulting in a small contact area with the crushing rollers. Furthermore, the bottle surface (especially smooth PET bottles without impurities) has a low coefficient of friction. When the clamping force applied by the crushing rollers is insufficient to counteract the bottle's inherent circular rolling tendency, the bottle will rotate along the roller surface instead of being effectively bitten into the crushing area, leading to slippage. To address this issue, a new waste plastic shredder is proposed. Utility Model Content

[0005] In view of this, the present invention provides a waste plastic crusher to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0006] The technical solution of this utility model embodiment is implemented as follows: a waste plastic crusher includes a crushing box, and a pre-compression component is provided on the crushing box. The pre-compression component includes a guide hopper, a pre-compression motor, two sliding seats, a driven pre-compression roller, an active pre-compression roller, a pressure adjusting rod, an adjusting nut, and a motor base. The driven preload roller is rotatably mounted inside the guide hopper via bearings, and the active preload roller is rotatably mounted inside two sliding seats via bearings. Two sliding grooves are symmetrically opened on both sides of the guide hopper, and the sliding seats are slidably connected inside the sliding grooves. The rear end of the pressure adjusting rod is fixedly connected to the front surface of the sliding seat, and a preload spring is sleeved on the outside of the pressure adjusting rod. The adjusting nut is threadedly connected to the outer wall of the pressure adjusting rod. The preload motor is mounted on one side of one of the sliding seats via a motor mount, and the output shaft of the preload motor is connected to the roller shaft of the active preload roller via a coupling.

[0007] More preferably, one end of the preload spring abuts against the adjusting nut via a washer, and the other end of the preload spring abuts against the inner front wall of the slide groove via a washer.

[0008] More preferably, the front end of the pressure adjusting rod penetrates the front surface of the guide hopper and is slidably connected to the guide hopper.

[0009] More preferably, the inside of the groove is fixedly connected to two guide rods, and the sliding seat is slidably connected to the outer side wall of the two guide rods.

[0010] More preferably, the inside of the guide hopper is equipped with two guide plates, and a scale line is opened on one side of the guide hopper.

[0011] More preferably, the guide hopper is fixedly connected to the upper surface of the crushing box and communicates with the crushing box.

[0012] More preferably, the crushing box is equipped with a crushing mechanism, which includes two crushing rollers and a crushing motor; The two crushing rollers are symmetrically located inside the crushing box, and the two ends of the roller shafts pass through both sides of the crushing box and are rotatably connected to the crushing box through bearing seats. The crushing motor is installed on one side of the crushing box, and the output shaft of the crushing motor is connected to the roller shaft of the crushing rollers through a coupling.

[0013] More preferably, a hopper is installed on the lower surface of the crushing box, and a support frame is fixedly connected to the outer side wall of the crushing box.

[0014] The present invention has the following advantages due to the adoption of the above technical solution: This invention achieves the flattening and crushing of waste plastic bottles by feeding them into a hopper, driving an active pre-compression roller with a pre-compression motor, and flattening the bottles with the assistance of a driven pre-compression roller. The flattened bottles are then conveyed to a crushing chamber for crushing. Compared to existing technologies, this invention achieves the pre-flattening of waste plastic bottles by setting up a pre-compression component. The flattened bottles will not roll or slip during crushing, thus improving crushing efficiency. Furthermore, the pre-compression force can be adjusted through the use of pre-compression springs, adjusting nuts, and other structures to meet different usage requirements. In addition, the active pre-compression roller adopts a movable design, which automatically widens the gap when plastic bottles are stacked and automatically resets when the stack decreases to ensure continuous compression force.

[0015] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a structural diagram of the pre-compression component of this utility model; Figure 4 This is an exploded view of the pre-compression component structure of this utility model; Figure 5 This is a structural diagram of the pressure regulating rod of this utility model.

[0018] Reference numerals: 101, Pre-compression assembly; 11, Guide hopper; 12, Guide plate; 13, Pre-compression motor; 14, Sliding seat; 15, Driven pre-compression roller; 16, Slide groove; 17, Scale line; 18, Active pre-compression roller; 19, Pressure adjusting rod; 20, Pre-compression spring; 21, Adjusting nut; 22, Guide rod; 23, Motor base; 31, Crushing box; 32, Crushing roller; 33, Crushing motor; 34, Discharge hopper; 35, Support frame. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-5 As shown, this utility model embodiment provides a waste plastic crusher, including a crushing box 31, on which a pre-compression assembly 101 is provided. The pre-compression assembly 101 includes a guide hopper 11, a pre-compression motor 13, two sliding seats 14, a driven pre-compression roller 15, an active pre-compression roller 18, a pressure adjusting rod 19, an adjusting nut 21, and a motor seat 23. The driven pre-compression roller 15 is rotatably mounted inside the feed hopper 11 via bearings, and the active pre-compression roller 18 is rotatably mounted inside the two sliding seats 14 via bearings. Both the driven pre-compression roller 15 and the active pre-compression roller 18 are provided with a rubber coating layer on the outside, specifically a nitrile rubber coating layer with a friction coefficient ≥0.8, which can enhance the gripping force. Moreover, under the action of the two pre-compression rollers, the cylindrical bottle can be pressed into a "flat sheet". The pre-compression motor 13 is mounted on one side of a sliding seat 14 via a motor base 23, and the output shaft of the pre-compression motor 13 is connected to the roller shaft of the active pre-compression roller 18 via a coupling. The pre-compression motor 13 drives the active pre-compression roller 18 to rotate, and the active pre-compression roller 18 drives the plastic bottle to move between the two rollers. With the cooperation of the driven pre-compression roller 15, the bottle is flattened. At the same time, the driven pre-compression roller 15 rotates in the opposite direction to the active roller, forming a "clamping conveying force" to convey the pre-flattened plastic bottle to the crushing box 31. Two sliding grooves 16 are symmetrically opened on both sides of the guide hopper 11. The sliding seat 14 is slidably connected to the inside of the sliding groove 16. The rear end of the pressure adjusting rod 19 is fixedly connected to the front surface of the sliding seat 14, and a pre-compression spring 20 is sleeved on the outside of the pressure adjusting rod 19. When pre-compressing the waste plastic bottles, the active pre-compression roller 18 adopts a movable design. When the plastic bottles are stacked in, the gap can be automatically expanded and automatically reset when the stacking is reduced to ensure continuous pressing force. The adjusting nut 21 is threaded to the outer wall of the pressure adjusting rod 19. One end of the preload spring 20 abuts against the adjusting nut 21 through a washer, and the other end of the preload spring 20 abuts against the inner front wall of the slide groove 16 through a washer. A scale line 17 is provided on one side of the guide hopper 11. By setting the adjusting nut 21, the preload force can be adjusted. When the adjusting nut 21 is rotated, it rotates and squeezes the preload spring 20. When the preload spring 20 is compressed, the preload force increases. The preload spring 20 is made of 60Si2Mn spring steel; The scale line 17 is used to mark the pre-tightening force. This scale value is obtained through calibration. Specifically, the pre-tightening force of the adjusting nut 21 at different positions is measured in stages using a standard force gauge and a linear relationship is fitted. The force value is then evenly marked on the scale line 17 to achieve precise control. Furthermore, the pre-tightening force can be precisely adjusted by referring to the scale line 17.

[0022] During use, a motor for driving the driven pre-compression roller 15 can be installed on the feed hopper 11 as needed. For example, if there is too much material or insufficient friction, the driven roller speed may be out of sync. By adding a motor, the pre-compression effect can be guaranteed. The current design is feasible under light and medium loads.

[0023] In one embodiment, the front end of the pressure adjusting rod 19 penetrates the front surface of the guide hopper 11 and is slidably connected to the guide hopper 11. Two guide rods 22 are fixedly connected inside the chute 16. The sliding seat 14 is slidably connected to the outer side wall of the two guide rods 22. The guide rods 22 can guide and limit the sliding seat 14, thereby ensuring that the active preload roller 18 can slide smoothly along the guide rods 22.

[0024] In one embodiment, two guide plates 12 are installed inside the guide hopper 11. The guide hopper 11 is fixedly connected to the upper surface of the crushing box 31 and communicates with the crushing box 31. Through the guide plates 12, the waste plastic bottles put into the guide hopper 11 can be accurately guided to ensure that they fall accurately between the two rollers. Then, after the waste plastic bottles are pre-compressed, they fall into the crushing box 31.

[0025] In one embodiment, a crushing mechanism is installed inside the crushing box 31, which includes two crushing rollers 32 and a crushing motor 33. Two crushing rollers 32 are symmetrically located inside the crushing box 31, and the two ends of the roller shaft pass through both sides of the crushing box 31 and are rotatably connected to the crushing box 31 through bearing seats. The crushing motor 33 is installed on one side of the crushing box 31, and the output shaft of the crushing motor 33 is connected to the roller shaft of the crushing roller 32 through a coupling. The crushing motor 33 drives the crushing roller 32 to rotate. With the cooperation of the two crushing rollers 32, the crushing of waste plastic bottles can be achieved. The crushing roller 32 has wolf teeth-shaped teeth to enhance the crushing effect.

[0026] In this utility model, the crushing motor 33 and the pre-compression motor 13 are both existing technologies, so their internal structure, working principle, connection and control methods will not be described in detail.

[0027] In one embodiment, a hopper 34 is installed on the lower surface of the crushing box 31, and a support frame 35 is fixedly connected to the outer wall of the crushing box 31. The crushed plastic material falls into the hopper 34 and is then discharged from the bottom of the hopper 34.

[0028] In operation, the present invention works as follows: waste plastic bottles are fed into the guide hopper 11. Under the guidance of the guide plate 12, the plastic bottles fall between two pre-compression rollers. The pre-compression motor 13 drives the active pre-compression roller 18 to rotate. The active pre-compression roller 18 moves the plastic bottles between the two rollers. With the cooperation of the driven pre-compression roller 15, the bottle body is flattened. The flattened plastic bottles are conveyed to the crushing box 31 and then fall between two crushing rollers 32. The crushing motor 33 drives the crushing rollers 32 to rotate. With the cooperation of the two crushing rollers 32, the flattened waste plastic bottles are crushed. The crushed plastic material falls into the discharge hopper 34 and is then discharged from the bottom of the discharge hopper 34, thereby realizing the crushing of waste plastic bottles. Compared with the prior art, this utility model can achieve the pre-flattening operation of waste plastic bottles by setting the pre-compression component 101. The flattened plastic bottles will not roll and slip when crushed, thus improving the crushing efficiency. Moreover, the pre-compression force can be adjusted by the cooperation of the pre-compression spring 20, adjusting nut 21 and other structures to meet different usage requirements. At the same time, the active pre-compression roller 18 adopts a movable design. When plastic bottles are stacked in, the gap can be automatically widened and automatically reset when the stack is reduced to ensure continuous compression force.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A waste plastic crusher, comprising a crushing box (31), characterized in that: The crushing box (31) is provided with a pre-compression assembly (101), which includes a guide hopper (11), a pre-compression motor (13), two sliding seats (14), a driven pre-compression roller (15), an active pre-compression roller (18), a pressure adjusting rod (19), an adjusting nut (21), and a motor base (23). The driven preload roller (15) is rotatably mounted inside the guide hopper (11) via bearings. The active preload roller (18) is rotatably mounted inside the two sliding seats (14) via bearings. Two sliding grooves (16) are symmetrically opened on both sides of the guide hopper (11). The sliding seats (14) are slidably connected inside the sliding grooves (16). The rear end of the pressure adjusting rod (19) is fixedly connected to the front surface of the sliding seat (14). A preload spring (20) is sleeved on the outside of the pressure adjusting rod (19). The adjusting nut (21) is threadedly connected to the outer wall of the pressure adjusting rod (19). The preload motor (13) is mounted on one side of a sliding seat (14) via a motor seat (23). The output shaft of the preload motor (13) is connected to the roller shaft of the active preload roller (18) via a coupling.

2. The waste plastic crusher according to claim 1, characterized in that: One end of the preload spring (20) abuts against the adjusting nut (21) via a washer, and the other end of the preload spring (20) abuts against the inner front wall of the slide groove (16) via a washer.

3. The waste plastic crusher according to claim 1, characterized in that: The front end of the pressure regulating rod (19) passes through the front surface of the guide hopper (11) and is slidably connected to the guide hopper (11).

4. A waste plastic crusher according to claim 1, characterized in that: The slide groove (16) has two guide rods (22) fixedly connected inside, and the sliding seat (14) is slidably connected to the outer wall of the two guide rods (22).

5. A waste plastic crusher according to claim 1, characterized in that: The guide hopper (11) has two guide plates (12) installed inside, and a scale line (17) is opened on one side of the guide hopper (11).

6. A waste plastic crusher according to claim 1, characterized in that: The feed hopper (11) is fixedly connected to the upper surface of the crushing box (31) and communicates with the crushing box (31).

7. A waste plastic crusher according to claim 6, characterized in that: The crushing box (31) is equipped with a crushing mechanism, which includes two crushing rollers (32) and a crushing motor (33). The two crushing rollers (32) are symmetrically located inside the crushing box (31), and the two ends of the roller shaft pass through both sides of the crushing box (31) and are rotatably connected to the crushing box (31) through bearing seats. The crushing motor (33) is installed on one side of the crushing box (31), and the output shaft of the crushing motor (33) is connected to the roller shaft of the crushing roller (32) through a coupling.

8. A waste plastic crusher according to claim 7, characterized in that: A hopper (34) is installed on the lower surface of the crushing box (31), and a support frame (35) is fixedly connected to the outer side wall of the crushing box (31).

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