Extrusion hollow blow molding machine for plastic waste recycling

Abstract

The application relates to the field of blow molding machines, and discloses an extrusion hollow blow molding machine for plastic waste recycling, which comprises a bottom plate, a processing table and a mold, the processing table is arranged on the left side of the upper surface of the bottom plate, a second through hole is formed in the middle of the upper surface of the processing table, a jacking structure is arranged in the processing table, two blow molding boxes are driven to move towards each other by a moving structure and are folded together, heating blow molding structure is used for blow molding work, when the arc-shaped plate of the heating blow molding structure heats the plastic product to a certain degree, a cylinder is started to drive the mold to slowly move towards the side close to each other, and the arc-shaped plate can be automatically separated from the plastic product in the process of mold movement through cooperation with a driving structure, the interval between the arc-shaped plate and the plastic product is changed, the heating is continued, the static friction between the arc-shaped plate and the plastic product is avoided, the problem that the plastic product is deformed or even damaged due to the static friction is solved, and the blow molding work quality is improved.

Description

Technical Field

[0001] This invention relates to the technical field of blow molding machines, and in particular to an extrusion blow molding machine for recycling plastic waste. Background Technology

[0002] A blow molding machine is an industrial device that heats plastic granules and blows them into shape. It is mainly used to produce hollow containers such as plastic buckets and bottles. Its core processes include extrusion blow molding and injection blow molding, and it is suitable for raw materials such as polyethylene and polypropylene. Blow molding machines are used when molding plastic products.

[0003] In existing blow molding machines, a robotic arm moves between two first sliding grooves. A synchronous moving component drives two moving seats to move towards each other on a guide groove. The two moving seats drive two mounting blocks to move towards each other, thereby connecting the first sliding grooves on the two mounting blocks. At this time, the blank is located between two arc plates. The electric heating wires on the two arc plates begin to heat the blank until the blank is heated. Then, a retraction component drives the arc plates to retract into the guide sleeve, thereby disengaging the arc plates from the first sliding grooves. Then, a transmission component drives the mold to move on the first sliding grooves through the retraction component, thereby closing the two molds. After the molds are closed, the blank is located in the mold cavity, and then air is blown into the blank.

[0004] However, in the actual molding process, since the curved plate is pressed tightly against the plastic product for heating, when the curved plate is moved to separate from the heated plastic product after heating, the static friction generated between the curved plate and the plastic product can easily cause the plastic product to deform, or even damage the plastic product, thus reducing the blow molding quality. Therefore, there are areas for improvement. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides an extrusion blow molding machine for recycling plastic waste.

[0006] The present invention provides an extrusion blow molding machine for recycling plastic waste, which adopts the following technical solution:

[0007] An extrusion blow molding machine for recycling plastic waste includes a base plate, a processing table, and a mold. The processing table is arranged on the left side of the base plate. A second through hole is opened in the middle of the processing table. A lifting structure is arranged inside the processing table. Two blow molding boxes are arranged on the processing table through a moving structure. A heating blow molding structure is arranged inside the blow molding boxes. A feeding structure is arranged on the base plate.

[0008] The heated blow molding structure includes two molds respectively disposed in two blow molding boxes. A cylinder is installed on one side of each blow molding box away from each other. A first mounting plate is installed at one end of the cylinder output shaft inserted into the blow molding box. The mold is disposed on the first mounting plate. Two first guide rods are connected to the first mounting plate. A first guide tube is movably sleeved on each first guide rod. One end of the first guide tube is fixedly connected to the inner wall of the blow molding box. Guide grooves are provided on both the front and rear sides of the lower inner wall of the blow molding box. A moving block is slidably disposed in the guide groove. An arc-shaped plate is disposed on the moving block, and an electric heating wire is disposed inside the arc-shaped plate. A driving structure is provided between the moving block and the first mounting plate.

[0009] The driving structure includes a connecting strip connected to the movable block, a first driving plate installed at one end of the connecting strip, a first driving groove formed on the first driving plate, a first insert rod connected to the first mounting plate, and one end of the first insert rod being movably inserted into the first driving groove;

[0010] Both blow molding boxes have air inlets on one side close to each other, and one of the blow molding boxes has a sealing structure on its inner wall.

[0011] Preferably, the sealing structure includes a groove formed on the inner wall of the left blow molding box, two fixing rods connected between the two side walls of the groove, a sealing plate movably sleeved on the two fixing rods, a connecting groove formed in the middle of one side of the sealing plate, a first spring connected between the two sides of the sealing plate and the groove wall, and an automatic switching structure provided between the sealing plate and the mold.

[0012] Preferably, the automatic switching structure includes a second driving plate connected to one side below the sealing plate, the second driving plate having a second driving groove, and a second insert rod connected to one of the corresponding molds, the top end of the second insert rod being movably inserted into the second driving groove.

[0013] Preferably, the movable structure includes two transverse grooves formed on the processing table, with a crossbar rotatably connected between the groove walls at both ends of the transverse grooves. Movable seats are movably fitted on both crossbars, one of the crossbars is threaded, and the corresponding two movable seats are threaded grooves. A first motor is installed at the rear edge of the left side of the processing table, and one end of the output shaft of the first motor is connected to the threaded crossbar. The two blow molding boxes are respectively installed on the two movable seats.

[0014] Preferably, the feeding structure includes two sets of support rods connected to the base plate. A support platform is installed at the top of the support rods. A guide rail is provided on the support platform. A feeding seat is provided on the guide rail. A lifting and assembling structure is provided on the feeding seat. An inner plate is provided on the inner wall of the support platform. Rotating columns rotatably pass through the four corners of the inner plate. Gears are fixedly sleeved at the bottom of the rotating columns. Chains are sleeved on the four gears. The feeding seat is connected to the chains. A second motor is installed at one corner of the inner plate. The bottom end of the output shaft of the second motor is connected to one of the rotating columns.

[0015] Preferably, the material lifting structure includes a first through hole in the middle of the feeding seat, and a second guide rod connected to each of the four corners of the feeding seat. A second guide tube is movably sleeved on each of the second guide rods. A lifting platform is installed on the second guide tube. A placement plate is set in the middle of the lifting platform. A shielding structure is set on the placement plate.

[0016] Preferably, the barrier structure includes multiple barrier bars that move through the placement tray, each barrier bar having an end block installed at its bottom end, and a second spring sleeved on the barrier bar, with the two ends of the second spring connected to the end block and the placement tray, respectively.

[0017] Preferably, the lifting structure includes a second mounting plate fastened to the processing table by bolts, an electric push rod is mounted in the middle of the second mounting plate, and a pusher plate is mounted at the top of the output shaft of the electric push rod.

[0018] In summary, the present invention has the following beneficial technical effects:

[0019] 1. This invention includes a moving structure, a heating blow molding structure, and a driving structure. The moving structure moves two blow molding boxes closer together. The heating blow molding structure is used for blow molding. When the curved plate of the heating blow molding structure heats the plastic product to a certain degree, a cylinder is activated to slowly move the mold towards the side where they are closer together. The driving structure automatically moves the curved plate away from the plastic product during the mold movement. By changing the distance between the curved plate and the plastic product, static friction between the curved plate and the plastic product is avoided while heating continues, which could cause deformation or even damage to the plastic product, thereby improving the quality of the blow molding process.

[0020] 2. By setting up a sealing structure and an automatic switching structure, the present invention can block the air outlet on the blow molding box during the heating of plastic products by the arc plate, thereby reducing the heat dissipation inside the blow molding box and improving the heating efficiency. Furthermore, during mold closing, the automatic switching structure can drive the sealing plate of the sealing structure to move, so that the connecting groove on the sealing plate and the air outlet are interconnected, allowing the blow molding process to proceed smoothly through the air outlet.

[0021] 3. This invention, through the setting of a feeding structure, a lifting structure, a lifting and hoisting structure, and a shielding structure, not only allows for timely feeding of the plastic products to be blow-molded, but also for receiving and transferring the blow-molded plastic products. Furthermore, during the transfer process, the blow-molded plastic products can be cooled, making efficient use of working time and ensuring work efficiency. The lifting and hoisting structures automatically push the plastic products to be blow-molded into the blow molding box when they are conveyed to the area below the processing table, making operation labor-saving and convenient. The shielding structure prevents the plastic products from falling during transportation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an extrusion hollow blow molding machine for recycling plastic waste according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the feeding seat in an embodiment of the present invention;

[0024] Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged view of the structure at point A;

[0025] Figure 4 This is a schematic diagram of the structure of the processing table and blow molding box in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the blow-molded box in an embodiment of the present invention;

[0027] Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged view of the structure at point B;

[0028] Figure 7 This is a schematic diagram of the internal structure of the blow-molded box in an embodiment of the present invention.

[0029] Figure 8 This is an embodiment of the present invention. Figure 7 Enlarged view of the structure at point C.

[0030] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Processing table; 3. Blow molding box; 4. Air inlet; 5. Cylinder; 6. Arc-shaped plate; 7. Moving block; 8. Connecting strip; 9. Mold; 10. First insert rod; 11. First mounting plate; 12. First guide rod; 13. First guide tube; 14. First driving groove; 15. First driving plate; 16. Guide groove; 17. Fixing rod; 18. Groove; 19. First spring; 20. Sealing plate; 21. Connecting groove; 22. Second insert rod; 23. Second driving groove; 24. 25. Second drive plate; 26. First motor; 27. Horizontal groove; 28. Crossbar; 29. ​​Moving seat; 30. Support rod; 31. Support platform; 32. Rotating column; 33. Guide rail; 34. Second motor; 35. Inner plate; 36. Feeding seat; 37. First through hole; 38. Second guide rod; 39. Second guide tube; 40. Placement tray; 41. Lifting platform; 42. Barrier bar; 43. End block; 44. Second spring; 45. Second through hole; 46. Second mounting plate; 47. Electric push rod; 48. Pushing tray. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-8 The present invention will be described in further detail below.

[0032] This invention discloses an extrusion blow molding machine for recycling plastic waste. (See reference...) Figures 1-8 An extrusion hollow blow molding machine for recycling plastic waste includes a base plate 1, a processing table 2 and a mold 9. The processing table 2 is set on the left side of the base plate 1. A second through hole 44 is opened in the middle of the processing table 2. A lifting structure is set inside the processing table 2. Two blow molding boxes 3 are set on the processing table 2 through a moving structure. A heating blow molding structure is set inside the blow molding box 3. A feeding structure is set on the base plate 1.

[0033] The heated blow molding structure includes two molds 9 respectively set in two blow molding boxes 3. Cylinders 5 are installed on the side of the two blow molding boxes 3 that are far apart from each other. The output shaft of the cylinder 5 is inserted into the blow molding box 3 and a first mounting plate 11 is set at one end. The molds 9 are set on the first mounting plate 11. Two first guide rods 12 are connected to the first mounting plate 11. A first guide tube 13 is movably sleeved on each first guide rod 12. One end of the first guide tube 13 is fixedly connected to the inner wall of the blow molding box 3. Guide grooves 16 are opened on the front and rear sides of the lower inner wall of the blow molding box 3. A moving block 7 is slidably set in the guide groove 16. An arc plate 6 is set on the moving block 7. An electric heating wire is set in the arc plate 6. A driving structure is set between the moving block 7 and the first mounting plate 11.

[0034] The driving structure includes a connecting strip 8 connected to the movable block 7. A first driving plate 15 is installed at one end of the connecting strip 8. A first driving groove 14 is opened on the first driving plate 15. A first insert rod 10 is connected to the first mounting plate 11. One end of the first insert rod 10 is movably inserted into the first driving groove 14.

[0035] Two blow molding boxes 3 each have an air inlet 4 on one side close to each other, and a sealing structure is provided on the inner wall of one of the blow molding boxes 3.

[0036] The movable structure includes two transverse grooves 26 formed on the processing table 2. A crossbar 27 is rotatably connected between the two ends of the grooves 26. Movable seats 28 are movably fitted onto both crossbars 27. One crossbar 27 has a thread, and the corresponding two movable seats 28 have threaded grooves. A first motor 25 is installed at the rear edge of the left side of the processing table 2. One end of the output shaft of the first motor 25 is connected to the threaded crossbar 27. Two blow molding boxes 3 are respectively installed on the two movable seats 28. When the plastic product to be blow molded is fed between the two blow molding boxes 3, the first motor 25 is started, driving the threaded crossbar 27 to rotate. The left and right sections of the thread on the corresponding crossbar 27 have opposite directions. This causes the two sets of movable seats 28 to move the two blow molding boxes 3 closer together until they are closed. At this point, the cylinder 5 is started, driving the two molds 9 to move away from each other, causing the bottom end of the first insert rod 10 to slide in the first drive groove 14 of the first drive plate 15. The first insert rod 10 presses against the wall of the first driving groove 14, pulling the two sets of arc plates 6 to move and adhere to the plastic product. The power supply of the electric heating wire on the arc plate 6 is turned on, thereby heating the plastic product. When heated to a certain length, the cylinder 5 is activated to drive the mold 9 to move a certain distance in the direction of mutual approach. Through the reverse movement of one end of the first insert rod 10 in the first driving groove 14, the arc plate 6 is pushed to detach from the plastic product, increasing the distance between the arc plate 6 and the plastic product to continue heating the plastic product. This avoids the arc plate 6 continuing to adhere to the plastic product for heating, which could cause the plastic product to deform or even be damaged due to static friction between the arc plate 6 and the plastic product and the adhesion of the heated plastic product when the arc plate 6 detaches from the plastic product. After heating is completed, the cylinder 5 is activated again to drive the mold 9 to move in the direction of mutual approach for mold closing and blow molding. At the same time, the two sets of arc plates 6 are automatically moved back to their initial positions.

[0037] See Figures 5-7 The sealing structure includes a groove 18 formed on the inner wall of the left blow molding box 3, two fixing rods 17 connected between the two sides of the groove 18, a sealing plate 20 movably sleeved on the two fixing rods 17, a connecting groove 21 formed in the middle of one side of the sealing plate 20, a first spring 19 connected between the two sides of the sealing plate 20 and the groove wall of the groove 18, and an automatic switching structure between the sealing plate 20 and the mold 9.

[0038] The automatic switching structure includes a second driving plate 24 connected to one side below the sealing plate 20. The second driving plate 24 has a second driving groove 23. A second insert rod 22 is connected to one of the corresponding molds 9. The top end of the second insert rod 22 is movably inserted into the second driving groove 23. When the molds 9 move away from each other, the top end of the second insert rod 22 slides in the second driving groove 23. By using the pressure of one end of the second insert rod 22 against the groove wall of the second driving groove 23, the sealing plate 20 is pushed to move on the fixed rod 17, so that the connecting groove 21 on the sealing plate 20 is offset from the air outlet 4. In this way, heat dissipation in the blow molding box 3 can be reduced during heating, thereby improving heating efficiency. When the molds 9 move closer to each other and close the mold, one end of the second insert rod 22 slides in the opposite direction in the second driving groove 23, thereby driving the sealing plate 20 to move in the opposite direction on the fixed rod 17, so that the connecting groove 21 and the air outlet 4 are connected to each other. In this way, the plastic blow molding can be carried out smoothly through the air outlet 4.

[0039] See Figures 1-4 The feeding structure includes two sets of support rods 29 connected to the base plate 1. A support platform 30 is installed at the top of the support rods 29. A guide rail 32 is set on the support platform 30. A feeding seat 35 is set on the guide rail 32. A lifting and lifting structure is set on the feeding seat 35. An inner plate 34 is set on the inner wall of the support platform 30. Rotating columns 31 are rotatably passed through the four corners of the inner plate 34. Gears are fixedly sleeved at the bottom of the rotating columns 31. Chains are sleeved on the four gears. The feeding seat 35 is connected to the chain. A second motor 33 is installed at one corner of the inner plate 34. The bottom end of the output shaft of the second motor 33 is connected to one of the rotating columns 31.

[0040] The material lifting structure includes a first through hole 36 in the middle of the feeding seat 35, and a second guide rod 37 connected to each of the four corners of the feeding seat 35. A second guide tube 38 is movably sleeved on each second guide rod 37. A lifting platform 40 is installed on the second guide tube 38. A placement plate 39 is set in the middle of the lifting platform 40. A shielding structure is set on the placement plate 39.

[0041] The barrier structure includes multiple barrier bars 41 that move through the placement plate 39. Each barrier bar 41 has an end block 42 installed at its bottom end. A second spring 43 is sleeved on the barrier bar 41. The two ends of the second spring 43 are respectively connected to the end block 42 and the placement plate 39.

[0042] The lifting structure includes a second mounting plate 45 bolted to the processing table 2. An electric push rod 46 is mounted in the middle of the second mounting plate 45. A pusher plate 47 is mounted at the top of the output shaft of the electric push rod 46. A mechanical gripper transfers the product to be blow-molded onto the placement tray 39. A second motor 33 is started, driving a chain to rotate, which in turn moves the feeding seat 35 along the guide rail 32 to feed the plastic product onto the placement tray 39. A baffle bar 41 on the placement tray 39 acts as a barrier to prevent the plastic product from falling off the tray during feeding. When the plastic product reaches directly below the second through hole 44... When the second mounting plate 45 is in place, the electric push rod 46 on the second mounting plate 45 drives the pusher plate 47 to move slowly upward. When the pusher plate 47 contacts the lifting platform 40, as the pusher plate 47 continues to move upward, it drives the lifting platform 40 and the plastic product to move upward as a whole, moving the placement plate 39 and the plastic product out from above the second through hole 44, thereby realizing automatic feeding. After blow molding, it can also drive the blow-molded plastic product to be automatically unloaded, and then the second motor 33 is started again to promptly feed the next plastic product for blow molding. At the same time, the blow-molded plastic product can be cooled while being transferred, thus making full use of the working time and improving work efficiency.

[0043] The implementation principle of an extrusion blow molding machine for plastic waste recycling according to an embodiment of the present invention is as follows: First, the product to be blow molded is transferred to the placement tray 39 by a mechanical gripper. The second motor 33 is started to drive the chain to rotate, which in turn drives the feeding seat 35 to move on the guide rail 32 to feed the plastic product on the placement tray 39. The baffle bar 41 on the placement tray 39 acts as a baffle to prevent the plastic product from falling off the placement tray 39 during the feeding process. When the plastic product is fed to the position directly below the second through hole 44, the electric push rod 46 on the second mounting plate 45 is started to drive the pusher plate 47 to move slowly upward to push the material. When the tray 47 contacts the lifting platform 40, as the pushing tray 47 continues to move upward, it drives the lifting platform 40 and the plastic product to move upward as a whole, moving the placement tray 39 and the plastic product out from above the second through hole 44. The first motor 25 is started to drive the threaded crossbar 27 to rotate. The two sections of the thread on the crossbar 27 are opposite in direction. In this way, the two sets of moving seats 28 drive the two blow molding boxes 3 to move towards each other until the two blow molding boxes 3 are closed together. At this time, the cylinder 5 is started to drive the two molds 9 to move away from each other, causing the bottom end of the first insert rod 10 to slide in the first drive groove 14 of the first drive plate 15. The first insert rod 10 is used to move the second mold 9 away from each other. The compression of the groove wall of the drive groove 14 pulls the two sets of arc plates 6 to move and adhere to the plastic product. The power to the heating wires on the arc plates 6 is then turned on, heating the plastic product. When heated to a certain length, the cylinder 5 is activated, moving the mold 9 a certain distance closer together. Through the reverse movement of one end of the first insert rod 10 in the first drive groove 14, the arc plates 6 are pushed off the plastic product, increasing the distance between them to continue heating. This prevents the arc plates 6 from remaining pressed tightly against the plastic product during heating, which could lead to static friction between them when the arc plates 6 detach from the plastic product. The adhesion of heated plastic products can lead to deformation or even damage. After heating, cylinder 5 is activated to move mold 9 closer together for blow molding. Simultaneously, two sets of curved plates 6 are automatically moved to their initial positions. After blow molding, the first motor 25 is activated to move the two blow molding boxes 3 in the opposite direction to reset. Then, electric push rod 46 moves the lifting platform 40 and the blow-molded plastic product down to reset. Finally, the second motor 33 is activated to load the next plastic product for blow molding. Meanwhile, the blow-molded plastic product is cooled during transfer, thus achieving blow molding.

[0044] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An extrusion blow molding machine for recycling plastic waste, comprising a base plate (1), a processing table (2), and a mold (9), characterized in that: A processing table (2) is provided on the left side of the base plate (1). A second through hole (44) is provided in the middle of the processing table (2). A lifting structure is provided inside the processing table (2). Two blow molding boxes (3) are provided on the processing table (2) through a moving structure. A heating blow molding structure is provided inside the blow molding box (3). A feeding structure is provided on the base plate (1). The heating blow molding structure includes two molds (9) respectively set in two blow molding boxes (3). Cylinders (5) are installed on the side of the two blow molding boxes (3) that are far apart from each other. The output shaft of the cylinder (5) is inserted into the blow molding box (3) and a first mounting plate (11) is set at one end. The mold (9) is set on the first mounting plate (11). Two first guide rods (12) are connected to the first mounting plate (11). A first guide tube (13) is movably sleeved on each of the first guide rods (12). One end of the first guide tube (13) is fixedly connected to the inner wall of the blow molding box (3). Guide grooves (16) are opened on both the front and rear sides of the lower inner wall of the blow molding box (3). A moving block (7) is slidably set in the guide groove (16). An arc plate (6) is set on the moving block (7). An electric heating wire is set in the arc plate (6). A driving structure is set between the moving block (7) and the first mounting plate (11). The driving structure includes a connecting strip (8) connected to the movable block (7), a first driving plate (15) is installed at one end of the connecting strip (8), a first driving groove (14) is opened on the first driving plate (15), a first insert rod (10) is connected to the first mounting plate (11), and one end of the first insert rod (10) is movably inserted into the first driving groove (14); Both blow molding boxes (3) have air inlets (4) on one side close to each other, and a sealing structure is provided on the inner wall of one of the blow molding boxes (3).

2. The extrusion blow molding machine for recycling plastic waste according to claim 1, characterized in that: The sealing structure includes a groove (18) on the inner wall of the left blow molding box (3), two fixing rods (17) are connected between the two sides of the groove (18), a sealing plate (20) is movably sleeved on the two fixing rods (17), a connecting groove (21) is opened in the middle of one side of the sealing plate (20), a first spring (19) is connected between the two sides of the sealing plate (20) and the groove wall of the groove (18), and an automatic switching structure is provided between the sealing plate (20) and the mold (9).

3. The extrusion blow molding machine for recycling plastic waste according to claim 2, characterized in that: The automatic switching structure includes a second drive plate (24) connected to the lower side of the sealing plate (20), and a second drive groove (23) is opened on the second drive plate (24). A second insert rod (22) is connected to one of the molds (9), and the top end of the second insert rod (22) is movably inserted into the second drive groove (23).

4. The extrusion blow molding machine for recycling plastic waste according to claim 1, characterized in that: The movable structure includes two transverse grooves (26) on the processing table (2). A crossbar (27) is rotatably connected between the two ends of the grooves (26). Movable seats (28) are movably fitted on both crossbars (27). One of the crossbars (27) is threaded, and the corresponding two movable seats (28) are threaded. A first motor (25) is installed at the rear edge of the left side of the processing table (2). One end of the output shaft of the first motor (25) is connected to the threaded crossbar (27). The two blow molding boxes (3) are respectively installed on the two movable seats (28).

5. The extrusion blow molding machine for recycling plastic waste according to claim 1, characterized in that: The feeding structure includes two sets of support rods (29) connected to the base plate (1). A support platform (30) is installed at the top of the support rods (29). A guide rail (32) is provided on the support platform (30). A feeding seat (35) is provided on the guide rail (32). A lifting and lifting structure is provided on the feeding seat (35). An inner plate (34) is provided on the inner wall of the support platform (30). A rotating column (31) is rotated through the four corners of the inner plate (34). A gear is fixedly sleeved at the bottom of the rotating column (31). A chain is sleeved on the four gears. The feeding seat (35) is connected to the chain. A second motor (33) is installed at one corner of the inner plate (34). The bottom end of the output shaft of the second motor (33) is connected to one of the rotating columns (31).

6. The extrusion blow molding machine for recycling plastic waste according to claim 5, characterized in that: The material lifting structure includes a first through hole (36) in the middle of the feeding seat (35), and a second guide rod (37) is connected to each of the four corners of the feeding seat (35). A second guide tube (38) is movably sleeved on each of the second guide rods (37). A lifting platform (40) is installed on the second guide tube (38). A placement plate (39) is set in the middle of the lifting platform (40). A shielding structure is set on the placement plate (39).

7. The extrusion blow molding machine for recycling plastic waste according to claim 6, characterized in that: The barrier structure includes multiple barrier bars (41) that move through the placement plate (39). Each barrier bar (41) has an end block (42) installed at its bottom end. A second spring (43) is sleeved on the barrier bar (41), and the two ends of the second spring (43) are respectively connected to the end block (42) and the placement plate (39).

8. The extrusion blow molding machine for recycling plastic waste according to claim 1, characterized in that: The lifting structure includes a second mounting plate (45) fastened to the processing table (2) by bolts. An electric push rod (46) is mounted in the middle of the second mounting plate (45), and a pusher plate (47) is mounted at the top of the output shaft of the electric push rod (46).

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