A cooling system for a regenerative plastic extruder

Abstract

The application relates to a cooling system of a regenerated plastic extruder, an extruder material cooling technology, which comprises a water tank for containing cooling water, the water tank is provided with an inlet end and an outlet end, the water tank is provided with a supporting roller for supporting a material strip at the inlet end and the outlet end, the water tank is provided with a guide roller for pressing the material strip into the cooling water, the water tank is provided with a first drain pipe and a second drain pipe, the first drain pipe and the second drain pipe are symmetrically arranged about the guide roller shaft, the first drain pipe and the second drain pipe are both provided with a drain port, the first drain pipe and the second drain pipe drive the cooling water in the water tank to spiral stir when water is discharged, a water cooler is arranged on one side of the water tank, a water suction pipe is connected to the water inlet end of the water cooler, the water suction pipe is communicated with the bottom of the water tank, and the water outlet end of the water cooler is connected with a water supply pipe for communicating the first drain pipe and the second drain pipe. The application has the effect of improving the uniformity of the temperature of the cooling water in the water tank, and is beneficial to improving the cooling effect of the cooling water on the material strip.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of extruder material cooling technology, in particular to a cooling system of a recycled plastic extruder. BACKGROUND

[0002] Recycled plastic is the reuse of plastic, which is achieved by mechanical blade crushing operation. The recycled plastic extruder is used to heat the crushed plastic again, extrude and form the required raw material.

[0003] The extruded strip of the extruder needs to be cooled before it is shaped. The cooling efficiency of air cooling is low. In order to improve the cooling efficiency of the extruded strip of the extruder, the current extruder cooling system sets a water pool at the discharge port of the extruder, the water pool is filled with cooling water, the extruded strip of the extruder enters the cooling water for cooling and shaping, and then is conveyed out of the water pool. A water chiller is arranged on one side of the water pool, the water inlet end and the water outlet end of the water chiller are communicated with the water pool, forming a water circulation to ensure that the cooling water is at a suitable temperature. A traction device is arranged on the side of the water pool away from the water chiller. The principle of cooling the strip is that the strip exchanges heat with the cooling water, so the temperature of the cooling water near the strip gradually rises, resulting in uneven temperature of the cooling water in the water pool, which affects the cooling effect of the strip. SUMMARY

[0004] In order to improve the uniformity of the temperature of the cooling water in the water pool and improve the cooling effect of the cooling water on the strip, the present application provides a cooling system of a recycled plastic extruder.

[0005] The cooling system of the recycled plastic extruder provided by the present application adopts the following technical scheme:

[0006] A cooling system of a recycled plastic extruder, comprising a water pool for containing cooling water, the water pool is provided with an inlet end and an outlet end, the water pool is provided with a supporting roller for supporting the strip at the inlet end and the outlet end, the water pool is provided with a guide roller for pressing the strip into the cooling water, the water pool is provided with a first drain pipe and a second drain pipe, the first drain pipe and the second drain pipe are symmetrically arranged about the guide roller shaft, the first drain pipe and the second drain pipe are provided with a drain port, the first drain pipe and the second drain pipe drive the cooling water in the water pool to spiral when water flows out, a water chiller is arranged on one side of the water pool, a water suction pipe is connected to the water inlet end of the water chiller, the water suction pipe is communicated with the bottom of the water pool, and a water supply pipe for communicating the first drain pipe and the second drain pipe is connected to the water outlet end of the water chiller.

[0007] Through the above technical scheme, before the water tank cools the material strip, the operator starts the cold water machine, the cold water machine draws the water in the water tank into the cold water machine for cooling, and then the cooled water is transported towards the first drain pipe and the second drain pipe through the water supply roller, the cooling water is discharged from the drain port of the first drain pipe and the second drain pipe, and the cooling water in the water tank is spirally stirred, so that the stirring effect of the cooling water in the water tank is achieved, and the uniformity of the temperature of the cooling water in the water tank is improved, and the good cooling effect of the cooling water on the material strip is maintained. The material strip extruded by the extruder extends into the water tank from above the supporting roller at the water tank feeding end, extends around the bottom of the guide roller, and then extends upwards to above the supporting roller at the water tank discharging end and moves towards the traction mechanism, and the material strip is cooled by the cooling water during the process of passing through the water tank.

[0008] Optionally, a lifting frame is vertically slidably arranged in the water tank, and a driving assembly for controlling movement of the lifting frame is arranged on the water tank, and the guide roller is rotatably connected to the lifting frame.

[0009] Through the above technical scheme, the operator drives the lifting frame to ascend and descend through the driving assembly, and then drives the guide roller to ascend and descend, so that the operator can thread the material strip between the two supporting rollers.

[0010] Optionally, a first fan is fixedly connected to the lifting frame, the first fan is arranged close to the discharging end of the water tank, and the first fan blows air towards the supporting roller at the feeding end of the water tank, and the groove wall at the discharging end of the water tank has a ventilation opening.

[0011] Through the above technical scheme, the first fan is started to blow air towards the side wall close to the feeding end of the water tank, and the material strip close to the feeding end is pre-cooled, and in this process, air flows through the material strip at the discharging end of the water tank through the ventilation opening at the discharging end of the water tank, so that the material strip conveying the cooling water is air-dried, and water stains are reduced.

[0012] Optionally, an air guide pipe is arranged on the inner wall close to the feeding end of the water tank, an air outlet of the air guide pipe is arranged towards the material strip close to the feeding end of the water tank, a guide plate is fixedly connected to the air inlet of the air guide pipe, the guide plate is arranged opposite to the fan, and the guide plate is used to guide the air blown by the fan into the air guide pipe.

[0013] Through the above technical scheme, the first fan blows air into the guide plate, under the action of the guide plate, the air enters from the air inlet of the air guide pipe and is guided out from the air outlet, and the material strip close to the feeding end is cooled again, which is conducive to improving the cooling effect on the material strip.

[0014] Optionally, a plurality of annular grooves for limiting the material strip are arranged on the two supporting rollers, and a supporting plate is fixedly connected to the lifting frame at a position corresponding to the two supporting rollers, and a limiting groove for accommodating the material strip is formed in the supporting plate at a position corresponding to each annular groove, and when the guide roller is lowered into the pool, the annular groove and the limiting groove form a limiting hole for the material strip.

[0015] By adopting the above technical scheme, the lifting frame is lowered to drive the guide roller to press the material strip into the cooling water, and in this process, the supporting plate is lowered with the lifting frame, so that the annular groove and the baffle are close to each other to form a limiting hole, the material strip is guided through the limiting hole, and the entanglement and knotting between the material strips are reduced.

[0016] Optionally, a mounting frame is arranged on one side of the pool near the discharge end, two rollers are rotatably connected to the mounting frame, and water-absorbing sponges are sleeved on the two rollers, and the material strip is arranged between the two water-absorbing sponges.

[0017] By adopting the above technical scheme, the material strip conveyed from the discharge port of the pool passes between the two rollers, and the material strip is squeezed by the two water-absorbing sponges to clean the residual water on the material strip, so that the material strip is kept dry when it is conveyed out of the pool.

[0018] Optionally, the mounting frame comprises two rotating seats arranged on one side of the pool near the discharge end, the rotating seats correspond to the rollers one by one, and the rollers are rotatably connected to the corresponding rotating seats, first connecting rods and second connecting rods are hingedly connected to the rotating seats, one ends of the first connecting rods and the second connecting rods away from the corresponding rotating seats are hingedly connected to the pool, and a control assembly for controlling the two rotating seats to move close to or away from each other is arranged on the pool.

[0019] By adopting the above technical scheme, the operator pushes the two rotating seats to move by the control assembly, so that the two rotating seats move close to or away from each other, and then drive the two rollers to move close to or away from each other.

[0020] Optionally, the control assembly comprises an electric cylinder fixedly connected to the outer wall of the pool, a push block is fixedly connected to the piston rod of the electric cylinder, a push rod is hingedly connected to the push block, the push rod corresponds to the rotating seat one by one, and one end of the push rod away from the push block is hingedly connected to the rotating seat, and a baffle for limiting the rotation angle of the rotating seat is arranged on the pool.

[0021] By adopting the above technical scheme, the operator starts the electric cylinder to drive the push block to move, and under the linkage action of the push rod, the two rotating seats move close to or away from each other, and when the two rotating seats move away from each other to abut against the corresponding baffles, the two rollers are completely opened to facilitate the arrangement of the material strip.

[0022] Optionally, an inner cylinder is inserted inside the drum, and the inner cylinder is slidably or rotatably connected to the drum. Both ends of the inner cylinder are fixedly connected to end plates for preventing the inner cylinder from detaching from the drum. A spring is sleeved on the end of the inner cylinder near the push block, and the spring pushes the inner cylinder to move toward the push block. The end of the push rod away from the push block is hinged to the end plate near the push block.

[0023] The roller has a first air hole, and the inner cylinder has a second air hole. When the end of the inner cylinder away from the push block abuts against the roller, the inner wall of the roller blocks the second air hole, and the outer wall of the inner cylinder blocks the first air hole. When the end of the inner cylinder close to the push block abuts against the roller, the first air hole and the second air hole are connected. The inner cylinder is provided with an electric heating wire, and the end of the inner cylinder is provided with a second fan for blowing air into the inner cylinder.

[0024] By adopting the above technical solution, the electric cylinder pushes the push block to move, causing the two moving seats to unfold and abut against the corresponding baffles. During this process, the roller and the inner cylinder remain relatively stationary axially. The electric cylinder continues to push the push block, and under the pushing action of the push rod, the inner cylinder overcomes the elastic force of the spring and moves away from the push block, so that the first air hole and the second air hole are connected. The operator energizes the electric heating wire and starts the second fan to blow air towards the inner cylinder, and then blows air towards the water-absorbing sponge through the first and second air holes. The airflow carries away the moisture in the water-absorbing sponge, allowing the water-absorbing sponge to return to a dry state.

[0025] Optionally, the rotating seat has a first hinge ear and a second hinge ear. The first hinge ear is hinged to the rotating seat, and the second hinge ear is fixedly connected to the rotating seat. A connecting cylinder is rotatably connected to the first hinge ear, and the roller is rotatably connected to the second hinge ear. An insert block is fixedly connected to the connecting cylinder, and the roller is provided with a slot for engaging with the insert block. A threaded sleeve is threadedly connected to the connecting cylinder, and a positioning cylinder for fitting between the connecting cylinder and the roller is fixedly connected to the threaded sleeve.

[0026] By adopting the above technical solution, the operator flips the first hinge ear to drive the connecting cylinder to flip, so that the insert on the connecting cylinder is aligned with the slot on the roller. Then, the operator rotates the screw sleeve to drive the positioning cylinder to move towards the roller. The positioning cylinder is simultaneously fitted onto the roller and the connecting cylinder, thereby realizing the detachable connection between the connecting cylinder and the roller. This method makes it convenient for the operator to replace the water-absorbing sponge on the roller.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Cooling water is discharged from the drain outlets of the first and second drain pipes, causing the cooling water in the pool to be spirally agitated, which in turn helps to improve the uniformity of the cooling water temperature in the pool and improve the cooling effect of the cooling water on the material strip.

[0029] 2. The strip conveyed from the water tank outlet passes between two rollers and is squeezed by two water-absorbing sponges to remove residual moisture, ensuring that the strip remains dry when it leaves the water tank, thus reducing the possibility of the strip carrying moisture into the traction mechanism or the next process. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0031] Figure 2 This is a schematic diagram illustrating the structure of the feed end and the discharge end in an embodiment of this application.

[0032] Figure 3 This is a cross-sectional view of the air duct used in the embodiments of this application.

[0033] Figure 4 This is a structural schematic diagram illustrating the lifting state of the lifting frame in an embodiment of this application.

[0034] Figure 5 This is a structural schematic diagram illustrating the closed state of the rotating seat in an embodiment of this application.

[0035] Figure 6 This is a structural schematic diagram illustrating the open state of the rotating seat in an embodiment of this application.

[0036] Figure 7 This is an exploded view of the connecting cylinder used in the embodiments of this application.

[0037] Figure 8 This is an exploded view used in the embodiments of this application to illustrate the first and second pores.

[0038] Explanation of reference numerals in the attached drawings: 1. Water tank; 11. Feeding end; 12. Discharge end; 13. Support roller; 14. Circular groove; 2. Chiller; 21. Pumping pipe; 22. Water supply pipe; 23. First drain pipe; 24. Second drain pipe; 25. Drain outlet; 3. Lifting frame; 31. Drive assembly; 32. Cylinder; 33. Guide roller; 34. Support plate; 35. Limiting groove; 4. Horizontal frame; 41. First fan; 42. Ventilation outlet; 43. Air guide plate; 44. Air guide pipe; 5. Mounting frame; 51. Rotating seat; 52. ... 53. First connecting rod; 6. Second connecting rod; 7. First hinge ear; 8. Second hinge ear; 9. Connecting cylinder; 10. Roller; 11. Absorbent sponge; 12. Insert block; 13. Slot; 14. Screw sleeve; 15. Positioning cylinder; 16. Inner cylinder; 17. Step groove; 18. End plate; 19. Spring; 10. Heating wire; 11. Second fan; 12. First air hole; 13. Second air hole; 14. Limiting cylinder; 15. Control assembly; 16. Electric cylinder; 17. Push block; 18. Push rod; 19. Wing plate; 10. Baffle. Detailed Implementation

[0039] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0040] This application discloses a cooling system for a recycled plastic extruder. For example... Figure 1 and Figure 2 The cooling system of the recycled plastic extruder includes a rectangular water tank 1 filled with cooling water, and an opening at the top. The top of the water tank 1 has a feed end 11 and a discharge end 12 at its two ends along its width. Support rollers 13 are rotatably connected to both the feed end 11 and the discharge end 12, and the axial directions of the two support rollers 13 are parallel to the length direction of the water tank 1. Each support roller 13 has several annular grooves 14 for receiving material strips, and these grooves are spaced apart along the axial direction of the corresponding support roller 13.

[0041] A chiller 2 is installed outside the water tank 1. The inlet of the chiller 2 is connected to a pumping pipe 21, and the end of the pumping pipe 21 away from the chiller 2 is connected to the bottom of the water tank 1. The outlet of the chiller 2 is connected to a supply pipe 22 for supplying water to the water tank 1. The two side walls along the length of the water tank 1 are designated as side wall M and side wall N. A first drain pipe 23 is installed on side wall M, and a second drain pipe 24 is installed on side wall N. The supply pipe 22 is connected to both the first drain pipe 23 and the second drain pipe 24. The first drain pipe 23 is located near the outlet 12 of the water tank 1, and the second drain pipe 24 is located near the inlet 11 of the water tank 1. Both the first drain pipe 23 and the second drain pipe 24 have several drain outlets 25. The drain outlets 25 of the first drain pipe 23 drain water towards side wall N, and the drain outlets 25 of the second drain pipe 24 drain water towards side wall M.

[0042] likeFigure 3 and Figure 4 A lifting frame 3 is vertically slidably mounted on the water tank 1. A drive assembly 31 for controlling the lifting frame 3's raising and lowering is mounted on the water tank 1. A guide roller 33 for pressing the material strip into the cooling water is rotatably connected to the lower end of the lifting frame 3. Support plates 34 are fixedly connected to the side of the lifting frame 3 facing the two support rollers 13. Each of the two support plates 34 has a limiting groove 35 for the material strip to pass through at the position corresponding to the annular groove 14. When the drive assembly 31 drives the lifting frame 3 to descend, it drives the support plates 34 to move downward. When the lifting frame 3 moves to the lowest point, the support plate 34 is located on the side of the corresponding support roller 13 away from the water tank 1, and a limiting hole is formed between the annular groove 14 and the corresponding limiting groove 35. The material strip passes through the corresponding limiting hole, thereby preventing the material strip from knotting during the conveying process.

[0043] A horizontal frame 4 is fixedly connected to the upper end of the lifting frame 3. A first fan 41 is fixedly connected to the upper surface of the horizontal frame 4. When the lifting frame 3 moves down to its lowest point, the first fan 41 is located between the inlet end 11 and the outlet end 12 of the water tank 1. The air inlet of the first fan 41 faces the side of the water tank 1 near the outlet end 12, and the air outlet of the first fan 41 faces the side of the water tank 1 near the inlet end 11. A ventilation opening 42 is provided on the side wall of the water tank 1 near the outlet end 12. A guide pipe 44 is installed on the side wall of the water tank 1 near the outlet end 12. The air inlet of the guide pipe 44 faces upward, and the air outlet of the guide pipe 44 faces the side wall near the outlet end 12. A guide plate 43 is fixedly connected to the inner wall of the water tank 1. The lower end of the guide plate 43 is inclined away from the first fan 41. The guide plate 43 is used to guide the air generated by the first fan 41 into the guide pipe 44.

[0044] The drive assembly 31 includes a frame fixedly connected to the water tank 1, a lifting frame 3 vertically sliding on the frame, and a cylinder 32 vertically fixedly connected to the lifting frame 3. The piston rod of the cylinder 32 extends downward and is fixedly connected to the lifting frame 3.

[0045] like Figure 1 and Figure 5 Multiple mounting brackets 5 are provided on the outer wall of the water tank 1 near the discharge end 12. In this embodiment, there are two mounting brackets 5. Each mounting bracket 5 is provided with two rotating seats 51. The two rotating seats 51 are arranged vertically at intervals. A first connecting rod 52 and a second connecting rod 53 are hinged to the two rotating seats 51. The ends of the first connecting rod 52 and the second connecting rod 53 away from the rotating seats 51 are both hinged to the corresponding mounting bracket 5. The axial distance between the hinge axes of the two ends of the first connecting rod 52 is the same as the axial distance between the hinge axes of the two ends of the second connecting rod 53. A control component 8 is provided on the mounting bracket 5 for controlling the two rotating seats 51 to move closer or further apart.

[0046] like Figure 5 and Figure 6Two rotating seats 51 have a first hinge ear 6 and a second hinge ear 61 on their opposite surfaces. The first hinge ear 6 is hinged to the rotating seat 51, and the second hinge ear 61 is fixedly connected to the rotating seat 51. A cylindrical connecting tube 62 is rotatably connected to the first hinge ear 6, and a cylindrical roller 63 is rotatably connected to the second rotating seat 51. An absorbent sponge 64 is sleeved on the roller 63. A fixed insert 65 is fixedly connected to the end of the connecting tube 62 facing the roller 63. A slot 66 is provided on the connecting tube 62 for the insert 65 to receive. A threaded sleeve 67 is threadedly connected to the connecting tube 62, and a positioning tube 68 is fixedly connected to the threaded sleeve 67. The operator flips the first hinge ear 6 so that the insert block 65 on the connecting cylinder 62 is inserted into the slot 66 of the roller 63. Then, the operator turns the screw sleeve 67 to drive the positioning cylinder 68 to move axially, so that the positioning cylinder 68 moves between the connecting cylinder 62 and the roller 63. The positioning cylinder 68 is simultaneously sleeved on the connecting cylinder 62 and the roller 63, thereby restricting the connecting cylinder 62 and the roller 63 from moving away, and achieving the connection effect between the connecting cylinder 62 and the roller 63.

[0047] Both rollers 63 have cylindrical inner cylinders 7 inserted inside them. The inner cylinders 7 are axially slidable within the rollers 63 and rotatably connected to them. A stepped groove 71 is formed on the inner wall of the roller 63 near the connecting cylinder 62. End plates 72 are fixedly connected to both ends of the inner cylinder 7. The end plates 72 of the inner cylinder 7 near the connecting cylinder 62 are axially slidable within the stepped groove 71, while the end plates 72 of the inner cylinder 7 away from the connecting cylinder 62 are located outside the roller 63. A spring 73 is fitted onto the end of the inner cylinder 7 away from the connecting cylinder 62. The spring 73 is located between the corresponding end plate 72 and the roller 63, and pushes the corresponding end plate 72 away from the roller 63. The inner cylinder 7 is equipped with an electric heating wire 74. A second fan 75 is fixedly connected to the end plate 72 of the inner cylinder 7 away from the connecting cylinder 62. The air inlet of the second fan 75 faces the inner cylinder 7, and a through hole for communicating with the air outlet of the second fan 75 is opened on the end plate 72 near the second fan 75. A limiting cylinder 78 for abutting against the roller 63 is fixedly connected to the end of the inner cylinder 7 away from the connecting cylinder 62. The limiting cylinder 78 is located inside the spring 73.

[0048] like Figure 7 and Figure 8The inner cylinder 7 has several first air holes 76 on its circumferential surface and several second air holes 77 on its circumferential surface. When the spring 73 pushes the inner cylinder 7 to the end of the roller 63 away from the connecting cylinder 62, the inner wall of the roller 63 blocks the second air holes 77, and the outer wall of the inner cylinder 7 blocks the first air holes 76, thus keeping the inner cylinder 7 in a closed state and reducing the possibility of moisture entering the inner cylinder 7 and coming into contact with the electric heating wire 74. When the operator pushes the inner cylinder 7 against the elastic force of the spring 73 towards the connecting cylinder 62 until the limiting cylinder 78 abuts against the roller 63, the first air holes 76 and second air holes 77 connect. At this time, the operator starts the second fan 75 to blow air into the inner cylinder 7, and then blows air into the absorbent sponge 64 through the first air holes 76 and second air holes 77. The airflow carries away the moisture in the absorbent sponge 64.

[0049] like Figure 5 and Figure 6 The control assembly 8 includes an electric cylinder 81 connected to the mounting bracket 5. The piston rod of the electric cylinder 81 moves in a direction parallel to the length direction of the water tank 1. A push block 82 is fixedly connected to the piston rod of the electric cylinder 81. Wing plates 84 are fixedly connected to the push plates of the two inner cylinders 7 near the second fan 75. Two push rods 83 are hinged to the push blocks 82, with each push rod 83 corresponding to a wing plate 84, and the ends of the two push rods 83 away from their corresponding push blocks 82 are hinged to their corresponding wing plates 84. Baffles 85 are fixedly connected to the opposite sides of the two rotating seats 51 on the mounting bracket 5. During the process of the operator activating the electric cylinder 81 to push the two rotating seats 51 away from each other, axial relative movement between the inner cylinders 7 and the rollers 63 is prohibited. When both rotating seats 51 are flipped to abut against the corresponding baffles 85, the two rotating seats 51 are in the unfolded state. The operator continues to start the electric cylinder 81 to push the push block 82 to move. Under the linkage of the push rod 83, the inner cylinder 7 overcomes the elastic force of the spring 73 and moves towards the corresponding connecting cylinder 62, so that the first air hole 76 and the second air hole 77 are connected. At this time, the operator can start the second fan 75 to blow air on the water-absorbing sponge 64. Through the air flow, the moisture in the water-absorbing sponge 64 is taken away.

[0050] The implementation principle of this application embodiment is as follows: Before threading the material strip, the operator first activates the cylinder 32 to lift the mounting frame 5, which in turn lifts the guide roller 33, so that the operator can thread the material strip into the annular groove 14 of the two support rollers 13 and control the rollers 63 on each mounting frame 5 to open. This allows the material strip exiting from the discharge end 12 of the water tank 1 to pass between the two corresponding rollers 63 of each mounting frame 5 and extend to the traction mechanism.

[0051] The operator starts the cylinder 32 to drive the lifting frame 3 to descend, so that the guide roller 33 presses the material strip into the cooling water in the water tank 1, and starts the first fan 41. The electric cylinder 81 on one of the mounting frames 5 starts to drive the corresponding two rollers 63 to move closer to each other and tighten each material strip.

[0052] Driven by the traction mechanism, the strip moves towards the traction mechanism. During this process, the strip first enters the water tank 1 through the feed end 11, undergoes the first air cooling by the first fan 41, and then undergoes the second air cooling under the action of the air guide duct 44. After air cooling, the strip extends downward into the cooling water and passes under the guide roller 33. The strip that passes through the guide roller 33 extends upward and moves towards the support roller 13 at the discharge end 12 of the water tank 1. During this process, the strip near the discharge end 12 of the water tank 1 is dried by airflow through the air inlet of the first fan 41, reducing the moisture adhering to it. The strip that passes through the discharge end 12 of the water tank 1 passes between the sets of rollers 63 and moves towards the traction mechanism. The water-absorbing sponge 64 on one set of rollers 63 clamps the strip and absorbs the residual moisture in the strip.

[0053] The rollers 63 on the two mounting frames 5 are used alternately. One mounting frame 5 is designated as mounting frame F, and the other as mounting frame E. The two absorbent sponges 64 on mounting frame F clamp the material strip, while the two absorbent sponges 64 on mounting frame E are open. After a set time, the operator activates the electric cylinder 81 to open the two absorbent sponges 64 on mounting frame F. Simultaneously, the operator activates the electric cylinder 81 on mounting frame E to clamp the material strip with its corresponding two absorbent sponges 64, thus absorbing any remaining moisture. The operator then activates the fan on mounting frame F and powers the heating wire 74 to generate hot air, which dries the moisture on the absorbent sponges 64 for the next use.

[0054] By using the above methods, the moisture content of the material entering the traction mechanism is reduced, thereby reducing the impact of moisture carried out on the material on the next process or processing device.

[0055] During the cooling process of the material strip in the water tank 1, the chiller 2 draws cooling water from the water tank 1 through the pumping pipe 21 and cools it again. The cooled water, after being cooled again, enters the first drain pipe 23 and the second drain pipe 24 through the water supply pipe 22, and is discharged from the drain outlets 25 of the first drain pipe 23 and the second drain pipe 24, forming a cooling water circulation. The arrangement of the first drain pipe 23 and the second drain pipe 24 causes the cooling water in the water tank 1 to be spirally agitated when the cooling water is discharged from the first drain pipe 23 and the second drain pipe 24, so that the cooling water temperature in the water tank 1 is uniform, which is beneficial to improving the cooling effect on the material strip.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cooling system for a recycled plastic extruder, characterized in that: The system includes a water tank (1) for containing cooling water, with an inlet (11) and an outlet (12) on the tank (1). Both the inlet (11) and outlet (12) of the tank (1) are equipped with support rollers (13) for supporting the material strips. A guide roller (33) for pressing the material strips into the cooling water is installed inside the tank (1). A first drain pipe (23) and a second drain pipe (24) are installed inside the tank (1), and the first drain pipe (23) and the second drain pipe (24) are symmetrically arranged about the guide roller (33). The first drain pipe (23) and the second drain pipe (24) are each provided with a drain outlet (25). When the first drain pipe (23) and the second drain pipe (24) discharge water, they drive the cooling water in the water tank (1) to be agitated in a spiral motion. A chiller (2) is provided on one side of the water tank (1). The inlet end of the chiller (2) is connected to a pumping pipe (21). The pumping pipe (21) is connected to the bottom of the water tank (1). The outlet end of the chiller (2) is connected to a water supply pipe (22) for connecting the first drain pipe (23) and the second drain pipe (24). The water tank (1) is provided with an installation frame (5) on the side near the discharge end (12). The installation frame (5) is rotatably connected to two rollers (63). Each of the two rollers (63) is fitted with a water-absorbing sponge (64), and the feed strip passes between the two water-absorbing sponges (64). The mounting frame (5) includes two rotating seats (51) disposed on the side of the water tank (1) near the discharge end (12). The rotating seats (51) correspond one-to-one with the rollers (63), and the rollers (63) are rotatably connected to the corresponding rotating seats (51). A first connecting rod (52) and a second connecting rod (53) are hinged on the rotating seats (51). The ends of the first connecting rod (52) and the second connecting rod (53) away from the corresponding rotating seats (51) are both hinged to the water tank (1). The water tank (1) is provided with a control component (8) for controlling the two rotating seats (51) to move closer to each other or further away from each other. The control component (8) includes an electric cylinder (81) fixedly connected to the outer wall of the water tank (1). A push block (82) is fixedly connected to the piston rod of the electric cylinder (81). A push rod (83) is hinged to the push block (82). The push rod (83) corresponds one-to-one with the rotating seat (51). The end of the push rod (83) away from the push block (82) is hinged to the rotating seat (51). A baffle (85) is provided on the water tank (1) to limit the rotation angle of the rotating seat (51). An inner cylinder (7) is inserted inside the roller (63). The inner cylinder (7) can slide or rotate within the roller (63). Both ends of the inner cylinder (7) are fixedly connected to end plates (72) for preventing the inner cylinder (7) from detaching from the roller (63). A spring (73) is fitted on one end of the inner cylinder (7) near the push block (82). The spring (73) pushes the inner cylinder (7) to move toward the push block (82). The end of the push rod (83) away from the push block (82) is hinged to the end plate (72) near the push block (82). The roller (63) has a first air hole (76) and the inner cylinder (7) has a second air hole (77). When the end of the inner cylinder (7) away from the push block (82) abuts against the roller (63), the inner wall of the roller (63) blocks the second air hole (77) and the outer wall of the inner cylinder (7) blocks the first air hole (76). When the end of the inner cylinder (7) close to the push block (82) abuts against the roller (63), the first air hole (76) and the second air hole (77) are connected. The inner cylinder (7) is provided with an electric heating wire (74) and the end of the inner cylinder (7) is provided with a second fan (75) for blowing air into the inner cylinder (7).

2. The cooling system for a recycled plastic extruder according to claim 1, characterized in that: A lifting frame (3) is vertically slidably installed inside the water tank (1). A drive assembly (31) for controlling the movement of the lifting frame (3) is installed on the water tank (1). The guide roller (33) is rotatably connected to the lifting frame (3).

3. The cooling system for a recycled plastic extruder according to claim 2, characterized in that: A first fan (41) is fixedly connected to the lifting frame (3). The first fan (41) is located near the discharge end (12) of the water tank (1), and the first fan (41) blows air toward the support roller (13) at the feed end (11) of the water tank (1). The tank wall at the discharge end (12) of the water tank (1) has a vent (42).

4. The cooling system for a recycled plastic extruder according to claim 3, characterized in that: An air guide pipe (44) is provided on the inner wall of the water tank (1) near the feed end (11). The air outlet of the air guide pipe (44) is set towards the material strip near the feed end (11) of the water tank (1). An air guide plate (43) is fixedly connected to the air inlet of the air guide pipe (44). The air guide plate (43) is set directly opposite the fan, and the air guide plate (43) is used to guide the air blown by the fan into the air guide pipe (44).

5. The cooling system for a recycled plastic extruder according to claim 2, characterized in that: Both of the two support rollers (13) are provided with a number of annular grooves (14) for limiting the material strip. The lifting frame (3) is fixedly connected with a support plate (34) at the position corresponding to the two support rollers (13). The support plate (34) is provided with a limiting groove (35) for accommodating the material strip at the position corresponding to each of the annular grooves (14). When the guide roller (33) is lowered into the water tank (1), the annular groove (14) and the limiting groove (35) form a limiting hole for the material strip to pass through.

6. The cooling system for a recycled plastic extruder according to claim 1, characterized in that: The rotating seat (51) has a first hinge ear (6) and a second hinge ear (61). The first hinge ear (6) is hinged to the rotating seat (51), and the second hinge ear (61) is fixedly connected to the rotating seat (51). A connecting cylinder (62) is rotatably connected to the first hinge ear (6). The roller (63) is rotatably connected to the second hinge ear (61). A plug (65) is fixedly connected to the connecting cylinder (62). A slot (66) for cooperating with the plug (65) is provided on the roller (63). A threaded sleeve (67) is threadedly connected to the connecting cylinder (62). A positioning cylinder (68) for sleeved between the connecting cylinder (62) and the roller (63) is fixedly connected to the threaded sleeve (67).

Images