A recycling equipment for waste materials from ultra-high molecular weight polyethylene sheet processing

Abstract

This invention relates to the field of polyethylene waste recycling and granulation technology, specifically to a recycling equipment for waste materials from ultra-high molecular weight polyethylene (UHMWPE) sheet processing. The equipment includes a spiral extruder, an extrusion die, a water cooling tank, a dewatering tank, and a pelletizer arranged sequentially, as well as side frames arranged on the sides of the water cooling tank and the dewatering tank. The side frames are provided with through-flowing bent guide grooves on both sides, with connecting rods installed through these grooves. A drive mechanism is located at the top of the side frame to drive the connecting rods to reciprocate and adjust their position along the length of the side frame. A traction mechanism is provided at the end of the connecting rod near the water cooling tank. This invention automatically guides the strip material discharged from the outlet to the water cooling tank, the dewatering tank, and the pelletizer sequentially via the drive mechanism, replacing manual feeding, reducing labor costs, improving production efficiency, and avoiding the risk of burns from contact, thus ensuring high safety.

Description

Technical Field

[0001] This invention relates to the field of polyethylene waste recycling and granulation technology, specifically to a recycling equipment for waste materials from ultra-high molecular weight polyethylene sheet processing. Background Technology

[0002] Ultra-high molecular weight polyethylene (UHMWPE) sheets are high-performance engineering plastic sheets made from high molecular weight polyethylene. They have excellent wear resistance, impact resistance, corrosion resistance, self-lubrication, and low-temperature resistance. They are also lightweight, non-absorbent, non-toxic, environmentally friendly, and easy to install. They are widely used in chemical, mining, metallurgy, port, marine engineering, and food processing industries. They are often used to make wear-resistant and corrosion-resistant parts such as silo liners, guide rails, conveyor belts, sliders, and gears. They are an ideal material to replace traditional materials such as metal and rubber.

[0003] The scraps and waste generated during the processing of ultra-high molecular weight polyethylene sheets can usually be recycled into usable raw materials through processes such as crushing, melting, extrusion, cutting and granulation. Its advantages are to realize resource recycling, reduce production costs and reduce environmental pollution.

[0004] After molten ultra-high molecular weight polyethylene (UHMWPE) is extruded into strips using an extruder, the strips need to be cooled before cutting and granulation to ensure high strip formability. Traditional strip cooling methods typically involve water cooling. After extrusion, the strips are usually manually guided to the cutting and granulating machine. Specifically, workers grasp the head of the freshly extruded strip and place it in a cooling water tank, passing it around the guide rollers at the appropriate positions before introducing the strip into the feed inlet of the cutting and granulating machine.

[0005] The above-mentioned manual feeding method has the following drawbacks:

[0006] Manual transfer is not only time-consuming, labor-intensive, and inefficient, but also requires a high level of professionalism and skill from the operator.

[0007] The extruded strips are hot, and even with gloves on, there is still a risk of burns when manually handling and transferring them.

[0008] When workers grasp the head of the strips and move them, the strips tend to stick together. After cooling and before feeding them into the cutting and granulation process, the sticky parts of the strips need to be cut off in advance to ensure granulation quality. This not only increases labor intensity but also increases waste. Summary of the Invention

[0009] The purpose of this invention is to provide a recycling device for waste materials from the processing of ultra-high molecular weight polyethylene sheets, so as to solve the technical problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution.

[0011] A recycling device for waste materials from ultra-high molecular weight polyethylene sheet processing includes a spiral extruder, an extrusion die, a water cooling tank, a draining tank, and a pelletizer arranged in sequence, as well as a side frame arranged on the sides of the water cooling tank and the draining tank. The side frame is provided with a bending guide groove that runs through both sides, and a connecting rod is installed through the bending guide groove. The top of the side frame is provided with a drive mechanism for driving the connecting rod to reciprocate and adjust along the length of the side frame.

[0012] A traction mechanism is provided on the end of the connecting rod near the water cooling pool. The traction mechanism is used to pull the strip material from the extrusion port of the screw extruder into the pelletizer. The traction mechanism includes a cantilever and a conveyor belt. A fixed arm is fixed on the end of the connecting rod. The cantilever is fixed to the bottom side of the fixed arm. Several through holes corresponding to the positions of the extrusion port are evenly distributed on the cantilever. The conveyor belt is located on the side of the cantilever near the pelletizer.

[0013] Preferably, the bending guide groove has a first horizontal section, a second horizontal section, an inclined section and a third horizontal section in sequence along the direction from the screw extruder to the pelletizer. When the connecting rod is located in the first horizontal section, the through hole is at the same height as the extrusion port. When the connecting rod is located in the second horizontal section;

[0014] The traction mechanism can pull the strip material through the bottom of the first guide roller in the water-cooling pool. When the connecting rod is located in the inclined part, the traction mechanism can pull the strip material through the top of the second guide roller in the dewatering pool. There is a clearance space between the end of the first guide roller near the side frame and the inner side wall of the water-cooling pool for the fixed arm to pass through.

[0015] Preferably, the traction mechanism further includes a first drive motor, a pair of mounting seats, a pair of rotating shafts, and a pair of mounting plates. A pair of mounting seats are symmetrically fixed on the side of the cantilever near the pelletizer. A rotating shaft is rotatably mounted on each of the two mounting seats. A mounting plate is fixed to the end of each rotating shaft that is close to the other. The first drive motor is fixed to the side of one of the mounting seats. The output shaft of the first drive motor is fixedly connected to the end of the rotating shaft on the same side. The conveyor belt is installed between the two mounting plates. When the connecting rod is not in the third horizontal part, the conveyor belt is horizontally extended.

[0016] Preferably, the conveyor belt is evenly distributed with several V-shaped guide grooves, which extend along the running direction of the conveyor belt, and the position of each V-shaped guide groove corresponds one-to-one with each through hole.

[0017] Preferably, the cantilever is provided with an annular cavity around each through hole. The inner wall of the through hole is arranged in an annular array with sliding holes that all communicate with the annular cavity. A sliding rod is slidably installed through each sliding hole. An arc-shaped scraper is fixed to the end of each sliding rod that extends into the through hole. A spring is sleeved on the outside of each sliding rod. One end of the spring is fixed to the arc-shaped scraper, and the other end is fixed to the inner wall of the through hole. Under the elastic restraint of the spring, each arc-shaped scraper can abut against and form a complete circular structure that matches the outer diameter of the strip material after cooling and hardening.

[0018] Preferably, the side of the extrusion die has a number of extrusion orifices, which are hollow cylindrical structures. Each extrusion orifice corresponds to and communicates with the extrusion port of the extrusion die. The end of each extrusion orifice is conical, and the minimum diameter is smaller than the inner diameter of the whole circular structure.

[0019] Preferably, the drive mechanism includes a threaded rod, a second drive motor, a nut seat, and a connecting arm. A plate frame extending along its length is fixed to the top of the side frame. Two supports are symmetrically fixed on the side of the plate frame away from the water-cooled pool. The threaded rod is rotatably installed between the two supports. The second drive motor is fixed on one of the supports, and its output shaft is fixedly connected to one end of the threaded rod.

[0020] The nut seat is threadedly fitted onto the threaded rod and slides against the surface of the plate frame. The bottom end of the connecting arm is fixed to the bottom surface of the nut seat. A connecting seat is fixed to the bottom end of the connecting arm, and the connecting seat is fixedly connected to the end of the connecting rod away from the traction mechanism.

[0021] Preferably, the connecting arm includes an outer cylinder fixed to the nut seat and a telescopic rod fixed to the connecting seat. The telescopic rod is slidably inserted into the outer cylinder. A vertically extending limiting groove is provided on the inner wall of the outer cylinder. A sliding block is fixed to the side of the telescopic rod. The sliding block is matched and limited in the limiting groove.

[0022] Preferably, the connecting rod is externally fitted with a roller, and the roller is limited and locked in the bending guide groove.

[0023] Preferably, a hot air box is fixed on the side of the side frame near the pelletizer. The bottom of the hot air box has a downward-facing air outlet. A sludge collection box with its top opening facing the air outlet is located on the side of the side frame below the hot air box. The strip material can pass between the hot air box and the sludge collection box.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0025] Driven by a drive mechanism, the traction mechanism moves back and forth along the bent guide groove on the side frame, automatically guiding the strip material discharged from the outlet to the water cooling tank, the dewatering tank, and the pelletizer in sequence. This achieves automated material transfer, replacing manual feeding, reducing labor costs, improving production efficiency, and avoiding the risk of burns, ensuring high safety.

[0026] The cantilever of the traction mechanism is evenly distributed with through holes corresponding to the outlet position, which allows the strips to pass through one by one and be separated. Combined with the V-shaped guide groove, the strips are limited to prevent the heads of the strips from sticking together, reducing the waste generated due to the need to cut them off. At the same time, the first drive motor drives the conveyor belt to swing, which facilitates the strips to separate from the conveyor belt and be smoothly guided into the pelletizer, ensuring the continuity of pelleting.

[0027] When the drive mechanism drives the connecting rod and the traction mechanism to move to the limit position on one side of the extrusion die, the strip outlet enters the above-mentioned circular structure and comes into contact with and is squeezed by the arc-shaped scraper. The arc-shaped scraper, after being compressed, pushes the slide bar to move outward, so that the strip outlet passes through the guide hole and extends to the other side, thus preventing the strip from falling onto the conveyor belt normally due to the blockage of the arc-shaped scraper when it is discharged.

[0028] When the drive mechanism drives the connecting rod and the traction mechanism to move towards the pelletizer, after the strip exits from between the arc-shaped scrapers, the spring elastic reset action pushes each arc-shaped scraper back to form a complete circular structure, which is tightly attached to the outer surface of the strip, increasing the adhesion between the strip and the strip and preventing the strip from only sticking to the wall of the V-shaped guide groove and falling off during traction. In addition, the complete circular structure formed by the four arc-shaped scrapers is tightly attached to the outer wall of the strip, which can scrape off the dirt attached to the outer wall of the strip and improve the pelleting quality. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure shown in Figure 1 from another perspective.

[0031] Figure 3 This is a schematic diagram of the extrusion port structure in this invention;

[0032] Figure 4 This is a schematic diagram of the side frame structure in this invention;

[0033] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0034] Figure 6 This is a schematic diagram of the drive mechanism structure in this invention;

[0035] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B;

[0036] Figure 8 This is a detailed structural diagram of the connecting arm in this invention;

[0037] Figure 9 This is a schematic diagram of the traction mechanism structure in this invention;

[0038] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point C;

[0039] Figure 11 This is a schematic diagram of the structure on the cantilever in this invention;

[0040] Figure 12 for Figure 11 A partial cross-sectional view of the structure shown.

[0041] Figure 13 This is a schematic diagram showing the extrusion fit between the extruder and the arc-shaped scraper.

[0042] Figure 14 This is a schematic diagram of the structure in this invention where the strip material passes between four arc-shaped scraping components;

[0043] Figure 15 This is a schematic diagram of the installation of the first guide roller structure in this invention.

[0044] In the diagram: 01. Screw extruder; 02. Extrusion die; 021. Outlet; 03. Water cooling tank; 031. First guide roller; 04. Drainage tank; 041. Second guide roller; 05. Pelletizer; 06. Hot air box; 07. Sludge collection box; 08. Strip material; 1. Side frame; 11. Bending guide groove; 111. First horizontal section; 112. Second horizontal section; 113. Inclined section; 114. Third horizontal section; 2. Connecting rod; 21. Fixed arm; 22. Roller; 3. Traction mechanism; 31. Cantilever; 32. 33. Through hole; 34. Mounting base; 35. Rotating shaft; 36. Mounting plate; 37. First drive motor; 38. Conveyor belt; 39. V-shaped guide groove; 40. Drive mechanism; 41. Plate frame; 411. Bracket; 42. Threaded rod; 43. Second drive motor; 44. Nut seat; 45. Connecting arm; 451. Outer cylinder; 452. Telescopic rod; 453. Limiting slide groove; 454. Sliding block; 46. Connecting base; 57. Annular cavity; 58. Sliding hole; 59. Sliding rod; 50. Arc-shaped scraper; 51. Spring. Detailed Implementation

[0045] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0047] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0048] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0049] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized. Example 1

[0050] Please see Figures 1-15This invention provides a recycling device for waste materials from ultra-high molecular weight polyethylene (UHMWPE) sheet processing, comprising a screw extruder 01, an extrusion die 02, a water cooling tank 03, a drain tank 04, and a pelletizer 05 arranged in sequence, as well as side frames 1 arranged on the sides of the water cooling tank 03 and the drain tank 04. The extrusion nozzles on the extrusion die 02 are evenly distributed on the side of the extrusion die 02 near the water cooling tank 03. The device also includes a crusher and a melting device. Both the crusher and the melting device adopt existing technology. Therefore, this application does not illustrate the crusher and the melting device. The waste materials generated from the processing of UHMWPE sheets are first crushed by the crusher. After crushing, they are melted by the melting device and the molten material is introduced into the screw extruder 01. Finally, the material is discharged as strips 08 through the extrusion nozzles.

[0051] The side frame 1 is provided with a bending guide groove 11 that runs through both sides. A connecting rod 2 is installed through the bending guide groove 11. The top of the side frame 1 is provided with a drive mechanism 4 for driving the connecting rod 2 to reciprocate and adjust along the length of the side frame 1. A traction mechanism 3 is provided on the end of the connecting rod 2 near the water cooling tank 03. The traction mechanism 3 is used to pull the strip 08 from the extrusion port of the screw extruder 01 into the pelletizer 05. The drive mechanism 4 drives the traction mechanism 3 to move from the extrusion die 02 to the pelletizer 05. The traction mechanism 3 pulls the strip 08 discharged from the extrusion port into the pelletizer 05. During the transfer process, the strip 08 passes through the water cooling tank 03 and the draining tank 04 to complete the water cooling and draining steps.

[0052] The strip material 08 can be cut into pellets by the pelletizer 05 and discharged from the discharge port on the side of the pelletizer 05 to obtain recycled material, thereby completing the recycling of waste material from the processing of ultra-high molecular weight polyethylene sheets. In addition, when performing the next recycling, the traction mechanism 3 is driven by the drive mechanism 4 to move and reset to the side of the extrusion die 02, and the above process is repeated.

[0053] The water cooling tank 03 has a first guide roller 031 evenly distributed along its length. The dewatering tank 04 is arranged at an angle and its bottom extends above the water cooling tank 03. The dewatering tank 04 has a second guide roller 041 evenly distributed along its length. The first guide roller 031 and the second guide roller 041 each have several grids. The strip material 08 is limited to the space between two adjacent grids to avoid contact with each other and to prevent the strip materials 08 from affecting each other.

[0054] like Figure 4 and Figure 6As shown, the bending guide groove 11 has a first horizontal section 111, a second horizontal section 112, an inclined section 113 and a third horizontal section 114 in sequence along the direction from the screw extruder 01 to the pelletizer 05. The third horizontal section 114 is higher than the first horizontal section 111, the first horizontal section 111 is higher than the second horizontal section 112, and the inclination of the inclined section 113 is the same as that of the drain tank 04. In addition, the first horizontal section 111 and the second horizontal section 112 are connected by an inclined section, the second horizontal section 112 and the inclined section 113 are connected by an inclined section, and the inclined section 113 and the third horizontal section 114 are connected by an inclined section.

[0055] like Figure 9 and Figure 10 As shown, the traction mechanism 3 includes a cantilever 31 and a conveyor belt 37. A fixed arm 21 is fixed to the end of the connecting rod 2. The connecting rod 2 is horizontal, and the fixed arm 21 is vertical. The connecting rod 2 and the fixed arm 21 form an L-shaped structure. The cantilever 31 is fixed to the bottom side of the fixed arm 21. The cantilever 31 is arranged parallel to the connecting rod 2. Several through holes 32 corresponding to the positions of the extrusion outlets are evenly distributed on the cantilever 31. The conveyor belt 37 is located on the side of the cantilever 31 close to the pelletizer 05. The conveyor belt 37 is used to pull and feed the strip material 08 toward the pelletizer 05. The conveyor belt 37 adopts existing technology, and its detailed structure and working principle will not be described in detail.

[0056] In addition, such as Figure 9 As shown, several V-shaped guide grooves 371 are evenly distributed on the conveyor belt 37. The V-shaped guide grooves 371 extend along the running direction of the conveyor belt 37, and the positions of each V-shaped guide groove 371 correspond one-to-one with each through hole 32.

[0057] When the drive mechanism 4 drives the connecting rod 2 to move and adjust along the bending guide groove 11, the height change at different positions in the bending guide groove 11 is used to guide the connecting rod 2 to adapt to the lifting and lowering, thereby driving the traction mechanism 3 to lift and lower synchronously, so as to realize the adaptive adjustment of the traction height of the traction mechanism 3 to the strip material 08.

[0058] Specifically, when the connecting rod 2 is located in the first horizontal part 111, the through hole 32 is at the same height as the extrusion port. That is, when the driving mechanism 4 drives the connecting rod 2 to move to the extreme position on the side of the extrusion mold 02, the through hole 32 corresponds to the extrusion port on the side of the extrusion mold 02. The strip material 08 discharged from the extrusion port can pass through the through hole 32 and fall onto the V-shaped guide groove 371 on the conveyor belt 37.

[0059] Because the extruded strip 08 has a certain viscosity, after the head falls onto the V-shaped guide groove 371, it will stick to the groove wall of the V-shaped guide groove 371. Then, through the operation of the conveyor belt 37, the strip 08 is conveyed forward a certain distance until the head of the strip 08 reaches the side of the conveyor belt 37 away from the cantilever 31. The strip 08 will be confined in the V-shaped guide groove 371.

[0060] When the connecting rod 2 is located in the second horizontal part 112, the traction mechanism 3 can pull the strip 08 through the first guide roller 031 in the water cooling pool 03. That is, the height of the strip 08 pulled by the traction mechanism 3 is lower than the first guide roller 031, so that the strip 08 can be driven to pass through the first guide roller 031. The first guide roller 031 is used to limit the strip 08 below the liquid surface in the water cooling pool 03, so as to ensure that the strip 08 can be completely immersed in the cooling water for sufficient cooling.

[0061] When the connecting rod 2 is located in the inclined part 113, the traction mechanism 3 can pull the strip 08 to pass above the second guide roller 041 in the draining pool 04. That is, the height of the strip 08 pulled by the traction mechanism 3 is higher than the second guide roller 041, so that the strip 08 can pass over the second guide roller 041 and be supported by the second guide roller 041 so that the liquid droplets on the strip 08 can drip onto the draining pool 04. The draining pool 04 is inclined to facilitate the drainage of the dripped water back into the water cooling pool 03.

[0062] Secondly, such as Figure 15 As shown, there is a clearance space between the end of the first guide roller 031 near the side frame 1 and the inner wall of the water cooling pool 03, so that the fixed arm 21 can pass through, avoiding the first guide roller 031 from blocking or interfering with the movement of the fixed arm 21, and thus facilitating the traction mechanism 3 to pull the strip 08 through from below the first guide roller 031.

[0063] In addition, such as Figure 5 and Figure 7 As shown, a roller 22 is mounted on the outside of the connecting rod 2. The roller 22 is limited and locked in the bending guide groove 11. When the driving mechanism 4 drives the connecting rod 2 to move along the bending guide groove 11, the roller 22 rolls against the inner wall of the bending guide groove 11, reducing friction and ensuring the smooth and stable movement of the connecting rod 2. Example 2

[0064] Please see Figure 9 and Figure 10 The difference between this embodiment and Embodiment 1 is that:

[0065] The traction mechanism 3 also includes a first drive motor 36, a pair of mounting seats 33, a pair of rotating shafts 34 and a pair of mounting plates 35. A pair of mounting seats 33 are symmetrically fixed on the side of the cantilever 31 near the pelletizer 05. Rotating shafts 34 are rotatably mounted on both mounting seats 33. Mounting plates 35 are fixed at the ends of the two rotating shafts 34 that are close to each other, and the rotating shafts 34 provide rotational capability for the mounting plates 35.

[0066] One side of the mounting base 33 is fixed with a first drive motor 36. The output shaft of the first drive motor 36 is fixedly connected to the end of the rotating shaft 34 on the same side. The conveyor belt 37 is installed between the two mounting plates 35. The first drive motor 36 works to drive the rotating shaft 34 and the mounting plate 35 on the same side to rotate. The rotating shaft 34 and the mounting plate 35 on the other side move accordingly, thereby driving the conveyor belt 37 to swing and adjust.

[0067] When the connecting rod 2 is not within the third horizontal section 114, the conveyor belt 37 is in a horizontally extending state, as shown in the image. Figure 9 As shown;

[0068] After the strip material 08 falls into the V-shaped guide groove 371, the drive mechanism 4 works to drive the traction mechanism 3 to move to one side of the pelletizer 05. The traction mechanism 3 pulls the strip material 08 into the water cooling tank 03 and passes under the first guide roller 031. The strip material 08 enters the water for water cooling. Then the traction mechanism 3 pulls the strip material 08 to the dewatering tank 04 and passes over the second guide roller 041 for dewatering.

[0069] When the connecting rod 2 moves into the third horizontal section 114, the cooled strip 08 cools and hardens, and is driven by the first drive motor 36 to rotate the rotating shaft 34, so that the conveyor belt 37 rotates downward to a vertical state. The strip 08 comes out from each V-shaped guide groove 371. Since the head of the strip 08 has reached the side of the conveyor belt 37 away from the cantilever 31 in advance, the strip 08, after hardening and separating from the conveyor belt 37, maintains a part of its length extending from the side of the cantilever 31. Then the drive mechanism 4 continues to drive the connecting rod 2 and the traction mechanism 3 to feed towards the pelletizer 05 until the extended part of the strip 08 is introduced into the feed port of the pelletizer 05. Under the action of the guide rollers in the pelletizer 05, the strip 08 can be continuously pulled into the pelletizer 05 for pelletizing. Example 3

[0070] Please see Figure 12 The difference between this embodiment and Embodiment 2 is that:

[0071] The cantilever 31 is provided with an annular cavity 5 around each through hole 32. The inner wall of the through hole 32 is arranged in an annular array with sliding holes 51 that are all through the annular cavity 5. A sliding rod 52 is slidably installed through each sliding hole 51. An arc-shaped scraper 53 is fixed to the end of each sliding rod 52 that extends into the through hole 32. A spring 54 is sleeved on the outside of each sliding rod 52. One end of the spring 54 is fixed to the arc-shaped scraper 53, and the other end is fixed to the inner wall of the through hole 32.

[0072] In this application, four arc-shaped scraping parts 53 are provided. Under the elastic restraint of the spring 54, each arc-shaped scraping part 53 can correspondingly abut against and form a complete circular structure that matches the outer diameter of the strip material 08 after cooling and hardening.

[0073] like Figure 3 As shown, the side of the extrusion die 02 is evenly distributed with several outlets 021. The outlets 021 are hollow cylindrical structures. Each outlet 021 corresponds to and communicates with the extrusion port of the extrusion die 02. The strip material 08 extruded by the extrusion die 02 enters the outlet 021 from the extrusion port and is finally discharged from the outlet 021.

[0074] Each outlet 021 has a conical end, and its minimum diameter is smaller than the inner diameter of the whole circular structure.

[0075] As the drive mechanism 4 drives the connecting rod 2 and the traction mechanism 3 to move to the limit position towards the extrusion die 02, since the minimum diameter of the outlet 021 is smaller than the inner diameter of the circular structure, the outlet 021, after entering the circular structure, eventually contacts and is squeezed by the arc-shaped scraper 53. The compressed arc-shaped scraper 53 then pushes the slide rod 52 to move outwards. Figure 13 As shown, at this time, the spring 54 is compressed and stored, and then the outlet 021 can pass through the through hole 32 and extend to the other side of the cantilever 31, so as to prevent the strip 08 from falling onto the conveyor belt 37 normally due to the obstruction of the arc-shaped scraper 53 when it is discharged.

[0076] When the drive mechanism 4 drives the connecting rod 2 and the traction mechanism 3 to move towards the pelletizer 05, after the strip outlet 021 disengages from between the arc-shaped scrapers 53, under the elastic reset action of the spring 54, it pushes each arc-shaped scraper 53 to reset and form a complete circular structure, which is tightly attached to the outer surface of the strip 08, increasing the bonding strength between it and the strip 08, and preventing the strip 08 from only sticking to the groove wall of the V-shaped guide groove 371 and falling off during traction.

[0077] It is worth noting that the step of the V-shaped guide groove 371 pulling the head of the strip 08 to the side of the conveyor belt 37 away from the cantilever 31 occurs before the strip outlet 021 disengages from the arc-shaped scraper 53, in order to prevent the arc-shaped scraper 53 from sticking to the strip 08 after resetting to a full circle structure and affecting the traction of the strip 08 by the conveyor belt 37.

[0078] The strip 08, after cooling and hardening, does not adhere to the arc-shaped scraper 53. Because dirt in the water adheres to the surface of the strip 08 as it passes through the water-cooling pool 03, when the strip 08 is introduced into the pelletizer 05, if... Figure 14 As shown, the circular structure formed by the four arc-shaped scraping parts 53 is closely attached to the outer wall of the strip 08, which can scrape off the dirt attached to the outer wall of the strip 08 and improve the granulation quality. Example 4

[0079] Please see Figure 6 and Figure 7 The difference between this embodiment and embodiment 3 is as follows:

[0080] The drive mechanism 4 includes a threaded rod 42, a second drive motor 43, a nut seat 44, and a connecting arm 45. A plate frame 41 extending along its length is fixed to the top of the side frame 1. Two supports 411 are symmetrically fixed to the side of the plate frame 41 away from the water-cooled pool 03. The threaded rod 42 is rotatably installed between the two supports 411. The second drive motor 43 is fixed on one of the supports 411, and its output shaft is fixedly connected to one end of the threaded rod 42. The nut seat 44 is threadedly fitted onto the threaded rod 42 and slides against the surface of the plate frame 41. The bottom end of the connecting arm 45 is fixed to the bottom surface of the nut seat 44. A connecting seat 46 is fixed to the bottom end of the connecting arm 45. The connecting seat 46 is fixedly connected to the end of the connecting rod 2 away from the traction mechanism 3.

[0081] The second drive motor 43 operates, and its output shaft drives the threaded rod 42 to rotate. The rotating threaded rod 42 drives the nut seat 44 to slide against the side of the plate frame 41. Under the connection of the connecting arm 45 and the connecting seat 46, the connecting rod 2 and the traction mechanism 3 move synchronously, providing a stable drive for the feed and retraction of the traction mechanism 3.

[0082] Among them, such as Figure 8 As shown, the connecting arm 45 includes an outer cylinder 451 fixed to the nut seat 44 and a telescopic rod 452 fixed to the connecting seat 46. The telescopic rod 452 is slidably inserted into the outer cylinder 451. The outer cylinder 451 and the telescopic rod 452 form a telescopic structure to adapt to the height difference that exists due to the undulation of the bending guide groove 11.

[0083] In addition, a vertically extending limiting groove 453 is provided on the inner wall of the outer cylinder 451, and a sliding block 454 is fixed on the side of the telescopic rod 452. The sliding block 454 is matched and limited in the limiting groove 453. The sliding cooperation between the limiting groove 453 and the sliding block 454 plays a limiting role, ensuring that the telescopic rod 452 can only move vertically relative to the outer cylinder 451, thereby preventing the telescopic rod 452, the connecting rod 2 and the traction mechanism 3 from deflecting. Example 5

[0084] Please see Figure 4 The difference between this embodiment and embodiment 4 is that:

[0085] A hot air box 06 is fixed on the side of the side frame 1 near the pelletizer 05. The bottom of the hot air box 06 has a downward blowing port. The side of the side frame 1 is located below the hot air box 06 and has a sludge collection box 07 with its top opening facing the blowing port. The strip material 08 can pass between the hot air box 06 and the sludge collection box 07.

[0086] The hot air box 06 uses existing technology to draw outside air into the hot air box 06 through a fan, heats the air using the electric heating structure inside the hot air box 06, and finally blows it out from the air outlet below, so as to further dry the strip material 08 passing below with hot air.

[0087] In addition, the side of the sludge collection box 07 is connected to an industrial vacuum cleaner (not shown in the figure) through a pipe. The industrial vacuum cleaner generates suction force to collect the dirt scraped off by the circular structure formed by the arc-shaped scraper 53.

[0088] It is also worth noting that the V-shaped guide groove 371 in this application has a V-shaped cross section, and the strip 08 with a circular cross section falls on the V-shaped guide groove 371. The contact area between the two is small, which makes it easy for the strip 08 to separate from the V-shaped guide groove 371 after hardening.

[0089] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, the present invention will not explain the control method and circuit connection in detail.

[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 present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A recycling device for waste materials from ultra-high molecular weight polyethylene (UHMWPE) sheet processing, comprising a screw extruder (01), an extrusion die (02), a water cooling tank (03), a drain tank (04), and a pelletizer (05) arranged sequentially, and a side frame (1) arranged on the side of the water cooling tank (03), characterized in that: The side frame (1) is provided with a bent guide groove (11) that runs through both sides, and a connecting rod (2) is installed through the bent guide groove (11). The top of the side frame (1) is provided with a drive mechanism (4) for reciprocating translation adjustment of the connecting rod (2). The connecting rod (2) is provided with a traction mechanism (3) on the end near the water cooling pool (03). The traction mechanism (3) is used to pull the strip (08) from the extrusion port of the screw extruder (01) into the pelletizer (05). The traction mechanism (3) includes a cantilever (31) and a conveyor belt (37); A fixed arm (21) is fixed to the end of the connecting rod (2), and the cantilever (31) is fixed to the bottom side of the fixed arm (21); The cantilever (31) is evenly distributed with a number of through holes (32) that correspond one-to-one with the position of the extrusion port, and the conveyor belt (37) is located on the side of the cantilever (31) close to the pelletizer (05). The cantilever (31) is provided with an annular cavity (5) around each of the through holes (32); The inner wall of the through hole (32) is arranged in a ring array with sliding holes (51) that all communicate with the annular cavity (5). Each of the aforementioned sliding holes (51) is slidably installed with a sliding rod (52); Each of the slide rods (52) has an arc-shaped scraper (53) fixed to the end of each slide rod (52) extending into the through hole (32). Each of the slide rods (52) is fitted with a spring (54) on its outside. One end of the spring (54) is fixed to the arc-shaped scraper (53), and the other end is fixed to the inner wall of the through hole (32). Each of the arc-shaped scraping parts (53) can, under the elastic restraint of the spring (54), form a round structure that matches the outer diameter of the strip material (08) after cooling and hardening.

2. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 1, characterized in that: The bending guide groove (11) has a first horizontal section (111), a second horizontal section (112), an inclined section (113) and a third horizontal section (114) in sequence along the direction from the screw extruder (01) to the pelletizer (05). When the connecting rod (2) is located inside the first horizontal part (111), the through hole (32) is at the same height as the extrusion port; When the connecting rod (2) is located in the second horizontal part (112), the traction mechanism (3) can pull the strip (08) through the bottom of the first guide roller (031) in the water cooling pool (03); When the connecting rod (2) is located in the inclined part (113), the traction mechanism (3) can pull the strip (08) through the second guide roller (041) in the drain pool (04); There is a clearance space between the end of the first guide roller (031) near the side frame (1) and the inner wall of the water cooling pool (03) for the fixed arm (21) to pass through.

3. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 2, characterized in that: The traction mechanism (3) also includes a first drive motor (36), a pair of mounting seats (33), a pair of rotating shafts (34), and a pair of mounting plates (35); A pair of mounting seats (33) are symmetrically fixed on the side of the cantilever (31) near the pelletizer (05). The rotating shaft (34) is rotatably mounted on both mounting seats (33). The mounting plate (35) is fixed at the end of the two rotating shafts (34) that are close to each other. A first drive motor (36) is fixed to the side of one of the mounting bases (33), and the output shaft of the first drive motor (36) is fixedly connected to the end of the rotating shaft (34) on the same side. The conveyor belt (37) is installed between the two mounting plates (35); When the connecting rod (2) is not inside the third horizontal section (114), the conveyor belt (37) is horizontally extended.

4. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 3, characterized in that: The conveyor belt (37) is evenly distributed with a number of V-shaped guide grooves (371), and the V-shaped guide grooves (371) all extend along the running direction of the conveyor belt (37). The positions of each of the V-shaped guide grooves (371) and each of the through holes (32) correspond one-to-one.

5. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 1, characterized in that: The extrusion die (02) has several strip outlets (021) evenly distributed on its side, and the strip outlets (021) are hollow cylindrical structures; Each of the described outlets (021) corresponds to and communicates with the extrusion outlet of the extrusion die (02); Each of the outlets (021) has a tapered end, and the minimum diameter is smaller than the inner diameter of the circular structure.

6. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 1, characterized in that: The drive mechanism (4) includes a threaded rod (42), a second drive motor (43), a nut seat (44), and a connecting arm (45). The top of the side frame (1) is fixed with a plate frame (41) extending along its length direction. Two supports (411) are symmetrically fixed on the side of the plate frame (41) away from the water cooling pool (03). The threaded rod (42) is rotatably installed between the two supports (411). The second drive motor (43) is fixed on one side of the bracket (411), and its output shaft is fixedly connected to one end of the threaded rod (42); The nut seat (44) is threadedly fitted onto the threaded rod (42) and slides against the surface of the plate frame (41); The bottom end of the connecting arm (45) is fixed to the bottom surface of the nut seat (44), and a connecting seat (46) is fixed to the bottom end of the connecting arm (45). The connecting seat (46) is fixedly connected to the end of the connecting rod (2) away from the traction mechanism (3).

7. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 6, characterized in that: The connecting arm (45) includes an outer cylinder (451) fixed to the nut seat (44) and a telescopic rod (452) fixed to the connecting seat (46). The telescopic rod (452) is slidably inserted into the outer cylinder (451); The inner wall of the outer cylinder (451) is provided with a vertically extending limiting groove (453), and a sliding block (454) is fixed on the side of the telescopic rod (452). The sliding block (454) is matched and limited in the limiting groove (453).

8. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 1, characterized in that: The connecting rod (2) is externally fitted with a roller (22), and the roller (22) is limited and locked in the bending guide groove (11).

9. The equipment for recycling waste materials from ultra-high molecular weight polyethylene sheet processing according to claim 6, characterized in that: A hot air box (06) is fixed to the side of the side frame (1) near the pelletizer (05), and the bottom of the hot air box (06) has a downward-facing air outlet. The side frame (1) has a sludge collection box (07) with its top opening facing the air outlet located below the hot air box (06). The strip (08) can pass between the hot air box (06) and the sludge collection box (07).

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