A granulator for regenerating TPE nylon coated particles from old plastic and a granulation method thereof

Abstract

The application relates to the technical field of waste plastic recycling, in particular to a granulator for recycling TPE nylon rubber-coated particles from old plastics and a granulating method thereof. The granulator comprises a connecting frame, a transverse frame, multiple groups of parallel double-head cutters arranged on the transverse frame, the multiple groups of double-head cutters being connected through a quadrilateral structure, a driving frame connected with the transverse frame through an extension structure, an eccentric wheel rotatably arranged at one end of the extension structure, an elastic abutting assembly arranged on the driving frame and abuttingly matched with the eccentric wheel, capable of making one end of the double-head cutter adhere to the connecting frame, a triggering assembly arranged on the driving frame and connected with the eccentric wheel, capable of driving the double-head cutter to deflect when the driving frame moves to the stroke end, so that the other end of the double-head cutter adheres to the connecting frame, and a stepping assembly connected with the transverse frame and the extension structure, capable of driving the transverse frame to move relative to the driving frame when the driving frame performs one lifting action, thereby improving the granulating quality.

Description

Technical Field

[0001] This invention relates to the field of waste plastic recycling technology, specifically a granulator and granulation method for recycling and regenerating TPE nylon-coated granules from old plastics. Background Technology

[0002] TPE nylon granulation is a process in which TPE and nylon materials are mixed, melted by heating in an extruder, extruded into shape, and then cooled and cut into granules. This material combines the flexibility of TPE with the strength of nylon, and the resulting granules can be used to manufacture automotive parts, sporting goods, and other products, exhibiting good wear resistance and weather resistance.

[0003] In the granulation process, the mainstream granulation processes include direct cutting, rotary cutting, and hot cutting. Among them, direct cutting granulation has a simpler structure and more reliable operation. However, the cutter in direct cutting granulation moves in a straight up-down motion. This motion can obstruct the strip-shaped TPE nylon during the granulation and resetting process. Furthermore, the cutter only performs the granulation action on one side, and the point of action is constant. This leads to abnormal wear and passivation at the point of interaction between the cutter and the extruded strip-shaped TPE nylon. During long-term continuous granulation, burrs will appear on the granules, affecting the granulation effect. Summary of the Invention

[0004] The purpose of this invention is to provide a granulator and granulation method for regenerating TPE nylon-coated granules from recycled plastics, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A granulator for recycling TPE nylon-coated granules from old plastics, including a frame;

[0007] A transverse frame is provided with multiple sets of parallel double-headed cutters, which are connected by a quadrilateral structure.

[0008] The drive frame is connected to the transverse frame via a telescopic structure, and an eccentric wheel is rotatably mounted on one end of the telescopic structure.

[0009] An elastic abutment component is disposed on the drive frame and abuts against the eccentric wheel, enabling one end of the double-headed cutter to fit against the connecting frame;

[0010] A triggering component is disposed on the drive frame and connected to the eccentric wheel. The triggering component can drive the double-headed cutter to deflect so that its other end fits against the connecting frame when the drive frame moves to the end of its stroke.

[0011] A stepping component connects the transverse frame and the telescopic structure. The stepping component can drive the transverse frame to move relative to the drive frame when the drive frame performs a lifting action.

[0012] As a further aspect of the present invention: the quadrilateral structure includes an extension rod connected to the pivot of the double-headed cutter, the extension rod being parallel to the double-headed cutter, and connecting plates being rotatably mounted at the ends of multiple sets of the extension rods.

[0013] As a further embodiment of the present invention: the telescopic structure includes a guide wheel disposed on the drive frame and a guide groove disposed on the transverse frame, the guide wheel being able to roll within the guide groove;

[0014] The telescopic structure includes a connecting shaft coaxially connected to the rotating shaft of one of the sets of double-headed cutters and a rotating sleeve rotatably mounted on the drive frame. The rotating sleeve is rotatably connected to the eccentric wheel and is slidably fitted with the connecting shaft.

[0015] A limiting block is provided on the inner wall of the rotating sleeve, and the limiting block slides in conjunction with a limiting groove provided on the connecting shaft.

[0016] As a further embodiment of the present invention: the elastic abutment component includes a slide groove disposed on the drive frame, a slider slidably mounted in the slide groove, and the slider is connected to the inner wall of the slide groove by a first cylindrical spring;

[0017] The elastic abutment assembly also includes an abutment member connected to the slider, the abutment member engaging with the eccentric wheel.

[0018] As a further embodiment of the present invention: the triggering assembly includes a trigger shaft connected to the rotating sleeve and coaxial with the shaft of the eccentric wheel, as well as a first triggering part and a second triggering part mounted on the drive frame;

[0019] Both the first trigger part and the second trigger part are provided with inclined guide surfaces, and the two sets of inclined guide surfaces are parallel.

[0020] As a further aspect of the present invention: the angle between the center line connecting the trigger shaft to the rotating sleeve and the inclined guide surface disposed on the second trigger part is an obtuse angle.

[0021] As a further embodiment of the present invention: the stepping component includes:

[0022] A drive shaft is rotatably mounted on the drive frame. One end of the drive shaft is connected to the rotating sleeve via a toothed belt, and the other end is connected to the driven shaft rotatably mounted on the drive frame via a one-way locking structure.

[0023] A transverse sleeve connected to the transverse frame has a guide groove on its inner wall, and a convex shaft on the driven shaft can roll within the guide groove.

[0024] As a further embodiment of the present invention: the one-way locking structure includes a follower sleeve slidably sleeved on the drive shaft, and the end of the follower sleeve opposite to the driven shaft is connected to the drive shaft through a second cylindrical spring;

[0025] The follower sleeve and the driven shaft are both provided with retaining teeth at their opposite ends.

[0026] As a further embodiment of the present invention: the guide groove includes a first arc-shaped groove and a second arc-shaped groove disposed on the inner wall of the transverse sleeve, wherein the beginning and end of the first arc-shaped groove and the second arc-shaped groove are connected by a spiral groove.

[0027] A method for granulation using the aforementioned granulator for recycling TPE nylon-coated granules from old plastics includes the following steps:

[0028] Step 1: The screw extruder extrudes strip-shaped plastic, which is then cooled and guided into the drive unit.

[0029] Step two: The drive frame drives multiple sets of double-headed cutters to cut the strip-shaped plastic into granules;

[0030] Step 3: After the drive frame moves to the end of its stroke, it triggers the component to deflect the double-headed cutter.

[0031] Step four: The drive frame reverses its movement and cuts again;

[0032] Step 5: When the drive frame is in the reset state, the stepper assembly drives the double-headed cutter to move laterally;

[0033] Step six: Repeat steps two through five above.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] By setting up an elastic abutment component, a trigger component, and multiple sets of double-headed cutters, the trigger component first triggers the elastic abutment component to act, which enables the double-headed cutter to automatically switch states. Combined with its reciprocating motion, it achieves continuous cutting, avoiding abnormal wear and dulling of the blade caused by only one side of the blade acting on the strip plastic. In addition, the tilted setting of the double-headed cutter can effectively avoid obstructing the strip plastic after cutting, ensuring the stability of the strip plastic conveying.

[0036] By using a stepping component, the lateral position of the dual-head cutter can be switched in a stepping cycle when the dual-head cutter performs the lifting and lowering action for granulation. This ensures that the dual-head cutter can interact with the strip plastic at different positions during the granulation process, improving the utilization rate of the blades on the dual-head cutter and preventing abnormal wear and dulling of the blades due to a constant cutting position. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of one embodiment of a granulator for regenerating TPE nylon-coated granules from recycled old plastics.

[0038] Figure 2 This is a schematic diagram of another angle of a granulator for regenerating TPE nylon-coated granules from recycled plastics.

[0039] Figure 3 This is a schematic diagram of the structure after the connecting frame is removed in one embodiment of a granulator for recycling TPE nylon coated granules from old plastics.

[0040] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.

[0041] Figure 5 A schematic diagram of a quadrilateral structure in one embodiment of a granulator for regenerating TPE nylon-coated granules from recycled plastics.

[0042] Figure 6 This is a schematic diagram illustrating the structural relationship between the trigger shaft and the first and second trigger parts in different states of a granulator for regenerating TPE nylon coated granules from recycled plastics in one embodiment.

[0043] Figure 7 An exploded view of the expansion structure in one embodiment of a granulator for regenerating TPE nylon-coated granules from recycled plastics.

[0044] Figure 8 An exploded view of the stepper component in one embodiment of a granulator for regenerating TPE nylon-coated granules from recycled plastics.

[0045] Figure 9 for Figure 8 Enlarged view of the structure at point B.

[0046] Figure 10 A cross-section of the transverse sleeve in one embodiment of a granulator for regenerating TPE nylon-coated granules from recycled old plastics.

[0047] Figure 11 A structural development diagram of the guide channel in one embodiment of a granulator for regenerating TPE nylon-coated granules from recycled plastics.

[0048] In the diagram: 1. Connecting frame; 101. Discharge hole; 2. Linear drive module; 3. Drive frame; 301. Guide wheel; 302. Slide groove; 4. Transverse frame; 401. Guide groove; 5. Double-headed cutter; 501. Connecting shaft; 502. Limiting groove; 6. Extension rod; 7. Connecting plate; 8. Rotating sleeve; 801. Limiting block; 9. Eccentric wheel; 10. Trigger shaft; 11. Abutment part; 12. Slider; 13. First cylindrical spring; 14. Toothed belt; 15. Drive shaft; 16. Second cylindrical spring; 17. Follower sleeve; 18. Driven shaft; 1801. Protruding shaft; 19. Clamping tooth; 20. Transverse sleeve; 2001. First arc groove; 2002. Second arc groove; 2003. Spiral groove; 21. First trigger part; 22. Second trigger part. Detailed Implementation

[0049] 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.

[0050] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0051] Please see Figures 1 to 11 In this embodiment of the invention, a granulator for regenerating TPE nylon coated granules from recycled old plastics includes a connecting frame 1, a transverse frame 4, a drive frame 3, an elastic abutment component, a trigger component, and a stepping component. The connecting frame 1 is connected to the drive device, and a linear drive module 2 is fixedly installed on the connecting frame 1. The linear drive module 2 is connected to the drive frame 3. Furthermore, the connecting frame 1 is provided with a discharge hole 101 for strip-shaped plastic to pass through.

[0052] The transverse frame 4 is provided with multiple sets of parallel double-headed cutters 5. The multiple sets of double-headed cutters 5 are connected by a quadrilateral structure. The quadrilateral structure includes an extension rod 6 connected to the pivot of the double-headed cutter 5. The extension rod 6 is parallel to the double-headed cutter 5, and the ends of the multiple sets of extension rods 6 are rotatably mounted with connecting plates 7.

[0053] The double-headed cutter 5 is initially set at an angle to avoid obstructing the movement of the strip-shaped plastic after cutting.

[0054] In use, the strip-shaped plastic extruded by the screw is guided into the cooling water device. During this process, the strip-shaped plastic is cooled and hardened, and then manually guided into the corresponding discharge hole 101. It is then guided into the drive device, which drives the strip-shaped plastic. During this process, the double-headed cutter 5 is in contact with the discharge side of the connecting frame 1, so that when the linear drive module 2 drives the drive frame 3 to move, the double-headed cutter 5 can move vertically in space and parallel to the discharge side of the connecting frame 1 to cut the strip-shaped plastic that is conveyed and protrudes from the discharge hole 101, thereby achieving granulation.

[0055] In this embodiment, multiple sets of double-headed cutters 5 are provided. This arrangement allows each set of double-headed cutters 5 to pass through the discharge hole 101 in sequence when the drive frame 3 moves. This enables the continuous cutting of multiple strips of plastic when the linear drive module 2 moves in one direction. Compared with the single-set cutter form used in the existing design, the linear drive module 2 can perform reciprocating motion at a lower frequency, thereby reducing the vibration caused by inertia when it drives the drive frame 3 to reciprocate to the end of the stroke.

[0056] Furthermore, the multiple sets of double-headed cutters 5 are in a parallel state to each other, and the aforementioned extension rod 6, connecting plate 7 and transverse frame 4 form a parallelogram structure. Under the action of this parallelogram structure, when the drive frame 3 moves to the end of the stroke and causes the double-headed cutters 5 to deflect, each set of double-headed cutters 5 can still maintain a parallel state, thereby improving the positional stability of the double-headed cutters 5 during cutting.

[0057] Please see Figure 7 The drive frame 3 and the transverse frame 4 are connected by a telescopic structure. An eccentric wheel 9 is rotatably mounted on one end of the telescopic structure. The telescopic structure includes a guide wheel 301 on the drive frame 3 and a guide groove 401 on the transverse frame 4. The guide wheel 301 can roll in the guide groove 401.

[0058] The telescopic structure includes a connecting shaft 501 coaxially connected to the rotating shaft of one of the sets of double-headed cutters 5 and a rotating sleeve 8 rotatably mounted on the drive frame 3. The rotating sleeve 8 is rotatably connected to the eccentric wheel 9 and the rotating sleeve 8 is slidably fitted with the connecting shaft 501.

[0059] A limiting block 801 is provided on the inner wall of the rotating sleeve 8, and the limiting block 801 slides in cooperation with the limiting groove 502 provided on the connecting shaft 501.

[0060] In this application, the double-headed cutter 5 can reciprocate and act on the strip-shaped plastic to perform granulation. Guided by the discharge hole 101, the strip-shaped plastic can interact evenly with the double-headed cutter 5, ensuring that the force on the double-headed cutter 5 is balanced. However, during the long-term granulation process, the force between a single set of strip-shaped plastic and the double-headed cutter 5 will concentrate at a certain point on the double-headed cutter 5, which can easily lead to more severe wear and passivation at that location compared to the sides of the point of action. Therefore, under the action of the stepping component, the double-headed cutter 5 can move laterally a predetermined distance relative to the drive frame 3, so that the point of action between the single set of strip-shaped plastic and the double-headed cutter 5 can be concentrated at a certain point on the double-headed cutter 5. The switching occurs on the cutter 5, thereby improving the durability of the double-headed cutter 5. The aforementioned double-headed cutter 5 needs to perform deflection actions synchronously. At this time, the connection between the double-headed cutter 5 and the rotating sleeve 8 can be maintained through the connecting shaft 501 and the rotating sleeve 8. Thus, with the cooperation of the elastic abutment component and the trigger component, the double-headed cutter 5 can perform an angle deflection action. At the same time, the connecting shaft 501 can slide inside the rotating sleeve 8. That is, with the cooperation of the rotating sleeve 8 and the connecting shaft 501, the double-headed cutter 5 can perform an angle rotation action and also perform a lateral movement action, ensuring that there is no interference between the two actions and improving the integration of the device.

[0061] Please see Figures 3-4 The elastic abutment component is disposed on the drive frame 3 and abuts against the eccentric wheel 9, which enables one end of the double-headed cutter 5 to fit against the connecting frame 1;

[0062] The elastic abutment component includes a slide groove 302 disposed on the drive frame 3, a slider 12 is slidably installed in the slide groove 302, and the slider 12 is connected to the inner wall of the slide groove 302 by a first columnar spring 13.

[0063] The elastic abutment assembly also includes an abutment member 11 connected to the slider 12. The abutment member 11 abuts against the eccentric wheel 9. The abutment member 11 has a horizontal abutment surface and two sets of vertical abutment surfaces on the side facing the eccentric wheel 9.

[0064] In the initial state, the first cylindrical spring 13 is stretched. At this time, the eccentric wheel 9 is in contact with the horizontal contact surface and one of the vertical contact surfaces, so that the eccentric wheel 9 is locked. In this state, the double-headed cutter 5 can keep in contact with the discharge side of the connecting frame 1, so that the strip plastic can be stably cut when the double-headed cutter 5 moves. Similarly, after the double-headed cutter 5 deflects, the eccentric wheel 9 can be in contact with the other end of the horizontal contact surface and another vertical contact surface, so that the eccentric wheel 9 is locked again. At the same time, the other end of the double-headed cutter 5 is in contact with the discharge side of the connecting frame 1, so that when the double-headed cutter 5 moves in the opposite direction, it performs the granulation action.

[0065] Please see Figure 1, Figure 4 , Figure 6 The triggering component is disposed on the drive frame 3 and connected to the eccentric wheel 9. When the drive frame 3 moves to the end of its stroke, the triggering component can drive the double-headed cutter 5 to deflect so that its other end fits against the connecting frame 1.

[0066] The triggering assembly includes a trigger shaft 10 connected to the rotating sleeve 8 and coaxial with the shaft of the eccentric wheel 9, as well as a first triggering part 21 and a second triggering part 22 mounted on the drive frame 3.

[0067] Both the first trigger part 21 and the second trigger part 22 are provided with inclined guide surfaces, and the two sets of inclined guide surfaces are parallel. The angle between the line connecting the center of the trigger shaft 10 to the center of the rotating sleeve 8 and the inclined guide surface provided on the second trigger part 22 is an obtuse angle.

[0068] For ease of understanding, the initial state is described as the double-headed cutter 5 starting to move downwards. In this state, the eccentric wheel 9 is in contact with the horizontal contact surface and one set of vertical contact surfaces, making the eccentric wheel 9 locked. At this time, the lower end of the double-headed cutter 5 is in contact with the discharge side of the connecting frame 1, so that when the double-headed cutter 5 moves downwards, it can cut and granulate the strip-shaped plastic. When the drive frame 3 moves downwards to the end of its stroke, the trigger shaft 10 can abut against the inclined guide surface on the second trigger part 22. This causes the rotating sleeve 8 to rotate, at which point the eccentric wheel 9 makes a circular motion, which drives the abutment 11 and the slider 12 to move, and further compresses the first cylindrical spring 13. After the eccentric wheel 9 moves past the middle position of the abutment 11, the first cylindrical spring 13 releases its elastic potential energy, causing the eccentric wheel 9 to actively make a circular motion, thereby realizing the switching of the double-headed cutter 5, so that its other end is in contact with the discharge side of the connecting frame 1, so that the granulation action can continue to be performed when the double-headed cutter 5 moves upward.

[0069] Based on the above settings, the state of the double-headed cutter 5 can be automatically switched, and its reciprocating motion can achieve continuous cutting, avoiding abnormal wear and dulling of the blade caused by only one side of the blade acting on the strip plastic.

[0070] Furthermore, since the angle between the center line connecting the trigger shaft 10 to the center of the rotating sleeve 8 and the inclined guide surface provided on the second trigger part 22 is an obtuse angle, and the attached... Figure 6 Angle 'a' in the middle is an acute angle, which makes the rotating sleeve 8 drive the double-headed cutter 5 to perform a deflection action when the trigger shaft 10 acts on the inclined guide surface on the second trigger part 22.

[0071] Furthermore, the projections of the two sets of inclined guide surfaces on the horizontal plane partially overlap with the central axis of the rotating sleeve 8, so that when the trigger shaft 10 moves to the end of the inclined guide surface, it can ensure that the eccentric wheel 9 moves past the middle position of the abutment member 11, thereby using the pulling force of the first columnar spring 13 to make the rotating sleeve 8 actively drive the double-headed cutter 5 to deflect.

[0072] Please see Figures 7-11 The stepping component connects the transverse frame 4 and the telescopic structure. The stepping component can drive the transverse frame 4 to move relative to the drive frame 3 when the drive frame 3 performs a lifting action.

[0073] include:

[0074] A drive shaft 15 is rotatably mounted on the drive frame 3. One end of the drive shaft 15 is connected to the rotating sleeve 8 through a toothed belt 14, and the other end is connected to the driven shaft 18 rotatably mounted on the drive frame 3 through a one-way locking structure. A damping sleeve is provided at the rotatable connection between the driven shaft 18 and the drive frame 3.

[0075] The one-way locking structure includes a follower sleeve 17 slidably sleeved on the drive shaft 15, and the end of the follower sleeve 17 facing away from the driven shaft 18 is connected to the drive shaft 15 through a second columnar spring 16.

[0076] Both the follower sleeve 17 and the driven shaft 18 are provided with retaining teeth 19 at their opposite ends.

[0077] When in use, when the double-headed cutter 5 performs a deflection action, the rotating sleeve 8 will rotate accordingly. At this time, the rotating sleeve 8 drives the drive shaft 15 to rotate through the toothed belt 14. In the initial state, the second columnar spring 16 is in a compressed state, so that under the support of the elastic force of the second columnar spring 16, the retaining sleeve 17 and the locking teeth 19 on the driven shaft 18 can be locked. Thus, when the drive shaft 15 rotates, it can drive the driven shaft 18 to rotate.

[0078] When the double-headed cutter 5 deflects in the opposite direction, the rotating sleeve 8 will also drive the follower sleeve 17 to deflect in the opposite direction. At this time, under the action of the damping sleeve, the driven shaft 18 is stationary, and the retaining teeth 19 on the follower sleeve 17 and the driven shaft 18 will be continuously misaligned. Based on the above settings, it is possible to realize that the driven shaft 18 can rotate intermittently in one direction during the reciprocating swing of the double-headed cutter 5.

[0079] The transverse sleeve 20 connected to the transverse frame 4 has a guide groove on its inner wall. The convex shaft 1801 on the driven shaft 18 can roll in the guide groove. The guide groove includes a first arc groove 2001 and a second arc groove 2002 on the inner wall of the transverse sleeve 20. The beginning and end of the first arc groove 2001 and the second arc groove 2002 are connected by a spiral groove 2003.

[0080] In this embodiment, since the driven shaft 18 is in an intermittent unidirectional rotation state, the cam shaft 1801 will also rotate intermittently in one direction. During the rotation of the cam shaft 1801, it can cooperate with the guide groove, thereby realizing the relative lateral movement of the double-headed cutter 5 relative to the drive frame 3. This allows the double-headed cutter 5 to interact with the strip plastic at different positions when performing the granulation action, avoiding the two working positions from always being the same, which would lead to abnormal wear and dulling of the working point of the double-headed cutter 5.

[0081] It should be noted that the driven shaft 18 rotates only once when the double-headed cutter 5 performs a lifting action, so that when the double-headed cutter 5 performs a lifting action, it can act on the strip plastic at one of its points of application. When the double-headed cutter 5 performs a lifting action again, the driven shaft 18 will rotate once more, so that the convex shaft 1801 can switch from the first arc groove 2001 or the second arc groove 2002 to the middle of the spiral groove 2003. During this process, the double-headed cutter 5 can move laterally, so that when it acts on the strip plastic, the point of application is different from the first point of application. Similarly, when the double-headed cutter 5 performs a lifting action again, the convex shaft 1801 can switch from the middle of the spiral groove 2003 to the first arc groove 2001 or the second arc groove 2002, thereby achieving a further switching of the point of application.

[0082] Based on the above settings, when the double-headed cutter 5 performs the lifting action to granulate, the lateral position of the double-headed cutter 5 can be switched in a step-by-step cycle, thereby ensuring that the double-headed cutter 5 can interact with the strip plastic at different positions during the granulation action, improving the utilization rate of the blade on the double-headed cutter 5, and preventing abnormal wear and dulling of the blade of the double-headed cutter 5 due to the constant cutting position.

[0083] As an embodiment of the present invention, a method for granulation using the aforementioned granulator for regenerating TPE nylon-coated granules from recycled old plastics is also proposed, comprising the following steps:

[0084] Step 1: The screw extruder extrudes strip-shaped plastic, which is then cooled and guided into the drive unit.

[0085] Step 2: The drive frame 3 drives multiple sets of double-headed cutters 5 to cut the strip-shaped plastic into granules.

[0086] Step 3: After the drive frame 3 moves to the end of its stroke, it triggers the component to deflect the double-headed cutter 5.

[0087] Step four, drive frame 3 moves in the reverse direction and cuts again;

[0088] Step 5: When the drive frame 3 is in the motion reset state, the stepper assembly drives the double-headed cutter 5 to move laterally;

[0089] Step six: Repeat steps two through five above.

[0090] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0091] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A granulator for recycling TPE nylon rubber-coated particles from old plastic, comprising a continuous frame; characterized in that Further comprising: a horizontal moving frame, a plurality of groups of parallel double-head cutters are arranged on the horizontal moving frame, and the plurality of groups of double-head cutters are connected through a quadrilateral structure; a driving frame connected to the horizontal moving frame through an extension structure, one end of the extension structure is rotatably connected to an eccentric wheel; an elastic abutting assembly arranged on the driving frame and abuttingly connected to the eccentric wheel, which can make one end of the double-head cutter abut the continuous frame; a trigger assembly arranged on the driving frame and connected to the eccentric wheel, which can make the other end of the double-head cutter abut the continuous frame when the driving frame moves to the end of the stroke; a stepping assembly connected to the horizontal moving frame and the extension structure, which can make the horizontal moving frame move relative to the driving frame when the driving frame performs one lifting action.

2. The granulator for recycling TPE nylon coated particles from old plastic according to claim 1, characterized in that, The quadrilateral structure comprises an extension rod connected to the rotating shaft of the double-head cutter, the extension rod is parallel to the double-head cutter, and the end of the plurality of extension rods is rotatably connected to a connecting plate.

3. The granulator for recycling TPE nylon coated particles from old plastic according to claim 1, characterized in that, The extension structure comprises a guide wheel arranged on the driving frame and a guide groove arranged on the horizontal moving frame, the guide wheel can roll in the guide groove; The extension structure comprises a connecting shaft coaxially connected to the rotating shaft of one group of double-head cutters and a rotating sleeve rotatably connected to the driving frame, the rotating sleeve is rotatably connected to the eccentric wheel, and the rotating sleeve is slidably sleeved with the connecting shaft; A limiting block is arranged on the inner wall of the rotating sleeve, and the limiting block is slidably connected to a limiting groove arranged on the connecting shaft.

4. The granulator for recycling TPE nylon coated particles from old plastic according to claim 1, characterized in that, The elastic abutting assembly comprises a sliding groove arranged on the driving frame, a sliding block is slidably arranged in the sliding groove, and the sliding block and the inner wall of the sliding groove are connected by a first cylindrical spring; The elastic abutting assembly further comprises an abutting piece connected to the sliding block, and the abutting piece is abuttingly connected to the eccentric wheel.

5. The granulator for recycling TPE nylon coated particles from old plastic according to claim 3, characterized in that, The trigger assembly comprises a trigger shaft connected to the rotating sleeve and coaxial with the rotating shaft of the eccentric wheel, and a first trigger part and a second trigger part arranged on the driving frame; An inclined guide surface is arranged on the first trigger part and the second trigger part, and two groups of the inclined guide surfaces are parallel.

6. The granulator for recycling TPE nylon coated particles from old plastic according to claim 5, characterized in that, The angle between the center line of the trigger shaft to the rotating sleeve and the inclined guide surface arranged on the second trigger part is obtuse.

7. The granulator for recycling TPE nylon coated particles from old plastic according to claim 3, characterized in that, The stepping assembly comprises: a driving shaft rotatably connected to the driving frame, one end of the driving shaft is connected to the rotating sleeve through a toothed belt, and the other end is connected to a driven shaft rotatably connected to the driving frame through a one-way locking structure; a horizontal moving sleeve connected to the horizontal moving frame, a guide groove is formed in the inner wall of the horizontal moving sleeve, and a convex shaft arranged on the driven shaft can roll in the guide groove.

8. The granulator for recycling TPE nylon coated particles from old plastic according to claim 7, characterized in that, The one-way locking structure comprises a following sleeve slidably arranged on the driving shaft, one end of the following sleeve away from the driven shaft is connected to the driving shaft through a second cylindrical spring; The opposite end of the following sleeve and the driven shaft is provided with a tooth.

9. The granulator for recycling TPE nylon coated particles from old plastic according to claim 7, characterized in that, The guide groove comprises a first arc-shaped groove and a second arc-shaped groove arranged on the inner wall of the transverse movement sleeve, and the first arc-shaped groove and the second arc-shaped groove are communicated through a spiral groove at the head and tail thereof.

10. A method of granulating by using the granulator for recycling TPE nylon coated particles from old plastic according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: Step one, a strip-shaped plastic is extruded by a screw extruder and is guided into a driving device after being cooled; Step two, a driving frame drives a plurality of double-end cutters to act, so that the strip-shaped plastic is cut to be granulated; Step three, after the driving frame moves to the end of the stroke, a triggering assembly acts to drive the double-end cutters to deflect; Step four, the driving frame moves reversely to cut again; Step five, when the driving frame moves to the reset state, a stepping assembly drives the double-end cutters to produce transverse movement; Step six, the steps two to five are repeated.

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