A plastic bottle cold water nozzle scrap shearing device

Abstract

This invention relates to a device for shearing residual material from the cold runner of a plastic bottle. The device includes a frame, a punching cylinder mounted on the top of the frame, a connecting crossbar connected to the piston rod of the punching cylinder, and a hollow annular shearing blade connected to the side of the connecting crossbar away from the upright. A blocking frame parallel to the upright is also slidably mounted on the frame, and a connecting plate is slidably mounted on the blocking frame. An annular air cylinder is fixedly connected to the connecting crossbar, positioned above the hollow annular shearing blade. Hollow tubes are evenly spaced around the bottom of the annular air cylinder, and an air bladder is connected to the bottom end of each hollow tube. When the piston rod of the punching cylinder extends downwards, it drives the connecting crossbar, the hollow annular shearing blade, the hollow tubes, and the air bladder downwards via the connecting crossbar. The air bladder extends into the bottle neck before the hollow annular shearing blade and is positioned below the cross-shaped cold runner. Inflating the air bladder with air allows it to catch the cross-shaped cold runner material cut by the hollow annular shearing blade.

Description

Technical Field

[0001] This invention relates to the field of material end shearing technology, specifically to a material end shearing device for cold water outlet of plastic bottles. Background Technology

[0002] During the injection molding process of plastic bottles, a cross-shaped cold gate sprue (i.e., gate residue) often forms inside the bottle neck. These sprues are connected to the inner wall of the bottle neck and need to be cut off in subsequent processes to ensure that the inner wall of the bottle neck is smooth and unobstructed, facilitating subsequent sealing or use.

[0003] Traditional removal methods often employ manual shearing or simple pneumatic punching devices. Manual shearing is inefficient, labor-intensive, and produces inconsistent cutting quality, easily leading to bottle neck breakage or material residue. Existing pneumatic punching devices typically use hollow ring shear blades to punch downwards directly, but a significant problem exists: the punched-off cross-shaped material ends fall directly into the bottle body, requiring a secondary removal operation. This impacts production processes and efficiency, and also presents the drawback of being difficult to remove.

[0004] Therefore, there is an urgent need to design a cutting device for the cold water nozzle of plastic bottles that can effectively receive and remove the cut-off material head, so as to overcome the above-mentioned defects. Summary of the Invention

[0005] The technical solution is as follows: A plastic bottle cold water nozzle scrap shearing device includes a frame, uprights spaced apart inside the frame, a punching cylinder mounted on the top of the frame, a connecting crossbar connected to the piston rod of the punching cylinder, the connecting crossbar slidably connected to the uprights, a hollow annular shearing blade connected to the side of the connecting crossbar away from the uprights, the hollow annular shearing blade extending downward along the inner wall of the bottle mouth to cut off the cross-shaped cold water nozzle scrap inside the bottle mouth, a blocking frame parallel to the uprights slidably mounted on the frame, a connecting cross plate slidably mounted on the blocking frame, the connecting cross plate being positioned above the connecting crossbar, an annular air cylinder fixedly connected to the connecting cross plate, the annular air cylinder being positioned above the hollow annular shearing blade, hollow tubes being evenly spaced around the bottom of the annular air cylinder, the hollow tubes passing through the hollow chamber of the hollow annular shearing blade and having an air bladder connected to their bottom end.

[0006] Optionally, an adjusting screw is rotatably connected inside the blocking frame, and the adjusting screw is threadedly connected to the upper part of the frame.

[0007] Optionally, a guide tube is connected to the bottom of the connecting cross plate, and a hollow tube is located inside the guide tube. The outer diameter of the guide tube is smaller than the inner diameter of the hollow annular shear blade, and the outer wall of the guide tube slides in fit with the inner wall of the hollow annular shear blade.

[0008] Optionally, an annular protrusion is provided on the inner wall of the hollow annular shear blade, and a first reset spring is provided between the annular protrusion and the bottom of the guide cylinder.

[0009] Optionally, the outer wall of the hollow annular shear blade is provided with an upper ring frame, and guide plates are evenly spaced around the bottom of the upper ring frame. A sliding plate is slidably connected to the guide plate, and the bottom of the sliding plate is connected to a lower ring frame. A sleeve is rotatably installed inside the lower ring frame. The inner wall of the sleeve has an internal thread groove that mates with the external thread at the bottleneck. A first motor is installed on the lower ring frame, and a first gear pair is provided between the output shaft of the first motor and the outer wall of the sleeve.

[0010] Optionally, the guide plate has positioning grooves evenly spaced along its axial direction on the side facing the sliding plate, and positioning beads are evenly spaced along its axial direction on the side facing the guide plate, with the positioning beads engaging with the positioning grooves.

[0011] Optionally, a second return spring is provided between the upper ring frame and the lower ring frame.

[0012] Optionally, a V-shaped fixture is mounted on the frame.

[0013] Optionally, a rotating disk is rotatably mounted on the lower part of the frame. The rotating disk has a radial guide groove around its circumference. An electric slide rail is provided below the guide groove. A limit clamp is slidably mounted on the electric slide rail. The limit clamp slides along the trajectory of the guide groove. A second motor is mounted on the frame. A second gear pair is provided between the output shaft of the second motor and the outer wall of the rotating disk.

[0014] Optionally, it also includes a vision sensor and a controller. The vision sensor is installed on the connecting crossbeam and faces the bottle mouth. The vision sensor is used to monitor whether the cross-shaped sprue head inside the bottle mouth is misaligned with the hollow tube. The controller is electrically connected to the vision sensor, the punching cylinder, the first motor, the second motor and the electric slide rail.

[0015] Compared with the prior art, the present invention has the following advantages: 1. When the piston rod of the punching cylinder extends downward, it drives the connecting horizontal plate, the hollow annular shearing blade, the hollow tube, and the air bag to move downward through the connecting horizontal frame. The air bag extends into the inside of the bottle mouth before the hollow annular shearing blade and is located below the cross-shaped cold water nozzle. By inflating the air bag, it expands to receive the cross-shaped cold water nozzle cut by the hollow annular shearing blade, thereby preventing the cross-shaped cold water nozzle from falling into the bottle body, eliminating the need for subsequent secondary cleaning processes, and thus ensuring the continuity of the process and the efficiency of the operation.

[0016] 2. The sleeve is driven to rotate by the first motor, so that the internal thread groove on the inner wall of the sleeve engages with the external thread of the bottleneck. This fixes the sleeve thread to the outer wall of the bottleneck before shearing, forming an external support. This effectively counteracts the axial and radial forces generated when the hollow annular shear blade punches downward, preventing the bottleneck from deforming, collapsing or breaking, and significantly improving the flatness and consistency of the shear cut.

[0017] 3. The limit clamp is driven by an electric slide rail to move along the guide groove, thereby centering and fixing the bottle body on the rotating disk; the rotating disk is driven by a second motor to rotate, thereby misaligning the cross-shaped sprue head inside the bottle mouth with the hollow tube, so that the air bag can smoothly extend under the cross-shaped cold sprue head, improving the operational flexibility of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the first partial three-dimensional structure.

[0020] Figure 3 For the present invention Figure 2 A partial three-dimensional structural diagram.

[0021] Figure 4 For the present invention Figure 3 A three-dimensional sectional view of the connecting crossbar.

[0022] Figure 5 This is a three-dimensional structural diagram of the present invention in which the connecting horizontal plate and the connecting crossbar are separated under the blocking effect of the blocking frame.

[0023] Figure 6 This is a three-dimensional sectional view of the connecting horizontal plate and guide cylinder of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the upper ring frame, lower ring frame, sleeve, second reset spring, and first motor of the present invention.

[0025] Figure 8 This is a three-dimensional sectional view of the lower ring frame and sleeve of the present invention in a separated state.

[0026] Figure 9 For the present invention Figure 1 The second partial three-dimensional structure diagram.

[0027] Figure 10 This is a three-dimensional sectional view of the rotating disk of the present invention.

[0028] The markings in the attached diagram are as follows: 1. Frame; 100. Bottle body; 101. Bottle neck; 102. Bottle mouth; 103. Cross-shaped cold water inlet head; 2. Punching cylinder; 3. Upright pole; 4. Connecting crossbeam; 5. Blocking frame; 51. Adjusting screw; 6. Connecting crossplate; 61. Guide cylinder; 7. Hollow annular shear blade; 71. Annular protrusion; 8. First return spring; 9. Annular air cylinder; 91. Electronic valve; 10. Hollow tube; 11. Airbag; 1 2. Upper ring frame, 121. Guide plate, 1211. Positioning groove, 13. Lower ring frame, 131. Sliding plate, 14. Sleeve, 141. Internal thread groove, 15. Second return spring, 16. First motor, 17. First gear pair, 18. V-shaped fixture, 19. Second motor, 20. Rotating disk, 2001. Guide groove, 21. Electric slide rail, 22. Limiting clamp, 23. Second gear pair, 25. Vision sensor. Detailed Implementation

[0029] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0030] Example: A device for shearing residual material at the cold water outlet of a plastic bottle, such as... Figures 1-6As shown in the figure, it includes a machine frame 1, a punching cylinder 2, a vertical rod 3, a connecting cross frame 4, a blocking frame 5, a connecting cross plate 6, an annular air cylinder 9, a hollow tube 10 and an airbag 11. The machine frame 1 is in a "C" - shaped structure. Vertical rods 3 are arranged at intervals inside the machine frame 1. A punching cylinder 2 is installed on the top of the machine frame 1. The piston rod of the punching cylinder 2 is connected to a connecting cross frame 4. The connecting cross frame 4 is slidably connected to the vertical rod 3. One side of the connecting cross frame 4 away from the vertical rod 3 is connected to a hollow annular cutting knife 7. The hollow annular cutting knife 7 is a cutting knife with a hollow cylindrical structure. The hollow annular cutting knife 7 is vertically installed at the bottom of the connecting cross frame 4. A through - hole is opened on the connecting cross frame 4, and this through - hole is directly above the hollow part of the hollow annular cutting knife 7. The hollow annular cutting knife 7 extends downward along the inner wall of the bottle mouth 102 to cut off the cross - shaped cold - water port material head 103 inside the plastic bottle mouth 102. A blocking frame 5 parallel to the vertical rod 3 is also slidably arranged on the machine frame 1. A connecting cross plate 6 is slidably arranged on the blocking frame 5. The connecting cross plate 6 is arranged above the connecting cross frame 4. An annular air cylinder 9 is fixedly connected to the connecting cross plate 6. The annular air cylinder 9 is arranged above the hollow annular cutting knife 7. The top of the annular air cylinder 9 is connected to an electronic valve 91. The electronic valve 91 is connected to an air compressor through an air delivery pipe. Four hollow tubes 10 are evenly connected to the bottom of the annular air cylinder 9 at intervals along its circumference. The hollow tubes 10 pass through the hollow chamber of the hollow annular cutting knife 7 and the bottom ends are connected to airbags 11. The length of the hollow tubes 10 is greater than or equal to the axial length of the hollow annular cutting knife 7. During use, the piston rod of the punching cylinder 2 extends downward, thereby带动 the connecting cross frame 4, the connecting cross plate 6, the annular air cylinder 9, the hollow tubes 10 and the airbags 11 to move downward synchronously. The airbags 11 extend into the bottle mouth 102 of the plastic bottle before the hollow annular cutting knife 7. As the piston rod of the punching cylinder 2 continues to extend downward, when the connecting cross plate 6 moves down to the lower end of the blocking frame 5, under the blocking effect of the blocking frame 5, the connecting cross plate 6, the hollow tubes 10 and the airbags 11 no longer move down. At this time, the airbag 11 at the lower end of the hollow tube 10 is located below the cross - shaped cold - water port material head 103. Subsequently, the electronic valve 91 on the annular air cylinder 9 is opened, and the compressed gas is inflated into the inner side of the annular air cylinder 9 through the electronic valve 91. The gas in the annular air cylinder 9 is filled into the airbags 11 through the hollow tubes 10, and the airbags 11 expand, thereby forming a support for the cross - shaped cold - water port material head 103. As the piston rod of the punching cylinder 2 continues to extend downward, the connecting cross frame 4带动 the hollow annular cutting knife 7 to move downward along the inner wall of the bottle mouth 102 of the plastic bottle, thereby cutting off the cross - shaped cold - water port material head 103 inside the bottle mouth 102. The cut - off cross - shaped cold - water port material head 103 is caught by the airbag 11 and thus will not fall into the inner side of the bottle body 100.

[0031] As Figures 1-5As shown, an adjusting screw 51 is rotatably connected inside the blocking frame 5. The adjusting screw 51 is threadedly connected to the upper part of the frame 1. The adjusting screw 51 drives the blocking frame 5 to rise and fall, thereby adjusting the height position of the blocking frame 5 on the frame 1 to accommodate plastic bottles of different heights.

[0032] like Figure 4 and Figure 5 As shown, a guide cylinder 61 is connected to the bottom of the connecting horizontal plate 6. The guide cylinder 61 slides with the inner wall of the through hole on the connecting horizontal frame 4. The hollow tube 10 is located inside the guide cylinder 61. The outer diameter of the guide cylinder 61 is smaller than the inner diameter of the hollow annular shear blade 7. The outer wall of the guide cylinder 61 slides with the inner wall of the hollow annular shear blade 7.

[0033] like Figure 4 and Figure 5 As shown, an annular protrusion 71 is provided on the inner wall of the hollow annular shearing blade 7. A first return spring 8 is provided between the annular protrusion 71 and the bottom of the guide cylinder 61. The two ends of the first return spring 8 are connected to the annular protrusion 71 and the bottom of the guide cylinder 61, respectively. When the piston rod of the punching cylinder 2 drives the connecting crossbeam 4 and the hollow annular shearing blade 7 to move downward, the hollow annular shearing blade 7 drives the guide cylinder 61 to move downward through the first return spring 8, thereby pulling the connecting crossbeam 6 to move downward along the blocking frame 5.

[0034] like Figure 1 and Figure 9 As shown, a V-shaped fixture 18 is installed on the frame 1. The V-shaped fixture 18 is used to initially position the body 100 of the plastic bottle.

[0035] like Figure 9 and Figure 10As shown, a rotating disk 20 is rotatably mounted on the lower part of the frame 1. Radial guide grooves 2001 are evenly spaced around the top of the rotating disk 20. An electric slide rail 21 is mounted below the guide grooves 2001. A limiting clamp 22 is fixedly connected to the slider of the electric slide rail 21. The limiting clamp 22 contacts and engages with the outer wall of the plastic bottle body 100. In this embodiment, an anti-slip rubber pad is fitted onto the outer side of the limiting clamp 22. The limiting clamp 22 moves along the trajectory of the guide grooves 2001 towards the center of the rotating disk 20 or towards the rotating disk 20. The outer wall of the plastic bottle 100 moves, and the limiting clamp 22 is driven by the electric slide rail 21 to move closer to or away from the center of the rotating disk 20, thereby achieving centering and limiting fixation of the plastic bottle body 100. A second motor 19 is installed on the frame 1. A second gear pair 23 is provided between the output shaft of the second motor 19 and the outer wall of the rotating disk 20. The second gear pair 23 includes a second gear installed on the output shaft of the second motor 19 and a second gear ring installed on the outer wall of the rotating disk 20. The second gear and the second gear ring mesh. The second motor 19 is a geared motor. The second motor 19 drives the rotating disk 20 to rotate through the second gear pair 23, thereby driving the plastic bottle to rotate. This causes the cross-shaped cold water nozzle 103 in the bottle mouth 102 to be misaligned with the hollow tube 10, thereby ensuring that the airbag 11 can smoothly extend downward into the bottle mouth 102 and move smoothly to the bottom of the cross-shaped cold water nozzle 103, thereby providing support for the cross-shaped cold water nozzle 103.

[0036] like Figures 1-4 As shown, it also includes a vision sensor 25 and a controller. The vision sensor 25 is installed on the connecting crossbeam 4 and faces the bottle mouth 102. The vision sensor 25 is used to monitor whether the cross-shaped cold water nozzle 103 inside the bottle mouth 102 is misaligned with the hollow tube 10. The controller is electrically connected to the vision sensor 25, the punching cylinder 2, the electronic valve 91, the second motor 19 and the electric slide rail 21.

[0037] In use, a plastic bottle containing a cross-shaped cold water nozzle 103 is conveyed to a rotating disk 20 via a conveyor belt. The bottle body 100 is initially positioned by a V-shaped fixture 18. Then, the electric slide rail 21 is activated by the controller, thereby driving the slider on the electric slide rail 21 to move toward the center of the rotating disk 20. The limiting clamp 22 moves with the slider on the electric slide rail 21, thereby fixing the bottle body 100 in a centered position on the rotating disk 20.

[0038] The piston rod of the punching cylinder 2 extends downwards, driving the connecting crossbeam 4, connecting plate 6, hollow annular shearing blade 7, annular air cylinder 9, hollow tube 10, and airbag 11 to move downwards simultaneously. The airbag 11 extends downwards into the bottle mouth 102 and gradually moves to below the cross-shaped cold water nozzle 103 inside the bottle mouth 102. When the connecting plate 6 moves downwards to the lower end of the blocking frame 5, the blocking frame 5 blocks the connecting plate 6, and the connecting plate 6, hollow tube 10, and airbag 11 no longer move downwards. At this time, the controller controls the electronic valve 91 to open, and the compressed gas is inflated into the inside of the annular air cylinder 9 through the electronic valve 91. The gas in the annular air cylinder 9 is inflated into the airbag 11 through the hollow tube 10, thereby causing the airbag 11 to expand. The receiving frame formed by the four inflated airbags 11 is set to be located inside the bottle mouth 102 and can slide up and down along the inner wall of the bottle mouth 102. As the piston rod of the punching cylinder 2 continues to extend downward, the connecting crossbeam 4 drives the hollow annular shearing blade 7 to move down along the inner wall of the bottle mouth 102 of the plastic bottle, thereby cutting off the connection between the cross-shaped cold sprue head 103 and the inner wall of the bottle neck 101. The cut-off cross-shaped cold sprue head 103 is held by the air bag 11, thereby preventing the cross-shaped cold sprue head 103 from falling into the inner side of the bottle body 100 of the plastic bottle.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an upper ring frame 12 is fixedly installed on the outer wall of the hollow annular shear blade 7. Guide plates 121 are evenly spaced around the bottom of the upper ring frame 12. A sliding plate 131 is slidably connected to the guide plate 121. The bottom of the sliding plate 131 is connected to a lower ring frame 13. The lower ring frame 13 is slidably sleeved on the outer wall of the hollow annular shear blade 7. A sleeve 14 is rotatably installed inside the lower ring frame 13. There is a gap between the sleeve 14 and the outer wall of the hollow annular shear blade 7. This gap is adapted to the thickness between the inner and outer walls of the plastic bottle neck 102. An internal thread groove 141 is opened on the inner wall of the sleeve 14. The internal thread groove 141 is engaged with the external thread on the outer wall of the bottle neck 101. A first motor 16 is installed on the lower ring frame 13. The output shaft of the first motor 16 is connected to the sleeve. A first gear pair 17 is provided between the outer walls of the sleeve 14. The first gear pair 17 includes a first gear mounted on the output shaft of the first motor 16 and a first gear ring mounted on the outer wall of the sleeve 14. The first gear meshes with the first gear ring. The first motor 16 is a geared motor. The first motor 16 drives the sleeve 14 to rotate through the first gear pair 17. The sleeve 14 is threadedly fixed to the neck 101 of the plastic bottle by engaging its internal thread groove 141 with the external thread of the bottle mouth 102, forming an external support. This effectively counteracts the axial and radial forces generated on the neck 101 when the hollow annular shearing blade 7 punches the cross-shaped cold water nozzle 103 downwards, preventing the neck 101 from deforming, collapsing or breaking, thereby ensuring the flatness and consistency of the shearing cut on the inner wall of the bottle mouth 102.

[0040] like Figure 8 As shown, the guide plate 121 has a positioning groove 1211 evenly spaced along its axial direction on the side facing the sliding plate 131, and the sliding plate 131 has positioning beads (existing mature technology, not shown in the figure) evenly spaced along its axial direction on the side facing the guide plate 121. The positioning beads are engaged with the positioning groove 1211.

[0041] like Figure 7 As shown, a second return spring 15 is provided between the upper ring frame 12 and the lower ring frame 13. The two ends of the second return spring 15 are connected to the upper ring frame 12 and the lower ring frame 13 respectively. The second return spring 15 is sleeved on the outside of the guide plate 121 and the sliding plate 131.

[0042] To enhance the impact resistance of the bottleneck 101 and prevent deformation of the bottleneck 101 when the hollow annular shear blade 7 cuts the cross-shaped cold water nozzle 103 downwards, the sleeve 14 moves downwards towards the bottle mouth 102 when the punching cylinder 2 drives the connecting crossbeam 4 and the hollow annular shear blade 7 to move downwards. When the sleeve 14 moves to the bottleneck 101, the first motor 16 drives the sleeve 14 to rotate through the first gear pair 17. When the sleeve 14 rotates, the inner thread groove 141 engages with the outer thread groove at the bottleneck 101, so that the sleeve 14 is threaded onto the outer wall of the bottleneck 101. The lower ring frame 13 and the sliding plate 131 move downwards along the bottleneck 101, and the second return spring 15 is stretched and deformed, thereby enhancing the rigidity of the bottleneck 101 and ensuring the stability of the bottleneck 101 when the hollow annular shear blade 7 cuts the cross-shaped cold water nozzle 103.

[0043] After the cutting operation of the cross-shaped cold water nozzle 103 is completed, the first motor 16 reverses, causing the sleeve 14 to rotate upward along the bottle neck 101, and the lower ring frame 13, sliding plate 131, and second return spring 15 to return to their original positions. Then, the piston rod of the punching cylinder 2 retracts upward, thereby driving the connecting cross frame 4, connecting cross plate 6, guide cylinder 61, hollow annular shearing blade 7, annular air cylinder 9, hollow tube 10, and air bag 11 upward away from the bottle neck 102, thus pushing the cut cross-shaped cold water nozzle 103 out of the bottle neck 102. 2. The plastic bottle is pulled out; at this time, the electric slide rail 21 drives the limiting clamp 22 to move along the guide groove 2001 to the outside of the rotating disk 20, thereby releasing the limitation on the plastic bottle body 100, and then transporting the plastic bottle that has completed the cutting operation of the cross-shaped cold water nozzle 103 to the next process; finally, the electronic valve 91 is opened to act as a venting valve, the gas in the air bag 11 is discharged through the electronic valve 91, the air bag 11 contracts, and the cut cross-shaped cold water nozzle 103 loses support and falls down from the air bag 11.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for shearing residual material from the cold water outlet of a plastic bottle, comprising a frame (1), uprights (3) spaced apart inside the frame (1), a punching cylinder (2) mounted on the top of the frame (1), a connecting crossbar (4) connected to the piston rod of the punching cylinder (2), the connecting crossbar (4) being slidably connected to the uprights (3), a hollow annular shearing blade (7) connected to the side of the connecting crossbar (4) away from the uprights (3), the hollow annular shearing blade (7) extending downward along the inner wall of the bottle mouth (102) to cut off the cross-shaped cold water outlet material (103) inside the bottle mouth (102), characterized in that: A blocking frame (5) parallel to the upright (3) is slidably installed on the frame (1). A connecting horizontal plate (6) is slidably installed on the blocking frame (5). The connecting horizontal plate (6) is located above the connecting horizontal frame (4). An annular air cylinder (9) is fixedly connected to the connecting horizontal plate (6). The annular air cylinder (9) is located above the hollow annular shearing blade (7). Hollow tubes (10) are evenly spaced around the bottom of the annular air cylinder (9). The hollow tubes (10) pass through the hollow chamber of the hollow annular shearing blade (7) and are connected to an air bag (11) at their bottom ends. The connecting horizontal plate (6) The bottom is connected to a guide cylinder (61), and a hollow tube (10) is located inside the guide cylinder (61). The outer diameter of the guide cylinder (61) is smaller than the inner diameter of the hollow annular shear blade (7). The outer wall of the guide cylinder (61) slides in conjunction with the inner wall of the hollow annular shear blade (7). An annular protrusion (71) is provided on the inner wall of the hollow annular shear blade (7). A first return spring (8) is provided between the annular protrusion (71) and the bottom of the guide cylinder (61). An upper ring frame (12) is provided on the outer wall of the hollow annular shear blade (7). The bottom of the upper ring frame (12) is annularly positioned around the outer wall of the hollow annular shear blade (7). Guide plates (121) are evenly spaced around the periphery. A sliding plate (131) is slidably connected to the guide plates (121). A lower ring frame (13) is connected to the bottom of the sliding plates (131). A sleeve (14) is rotatably installed inside the lower ring frame (13). An internal thread groove (141) is opened on the inner wall of the sleeve (14). The internal thread groove (141) is engaged with the external thread at the bottleneck (101). A first motor (16) is installed on the lower ring frame (13). A first tooth is provided between the output shaft of the first motor (16) and the outer wall of the sleeve (14). Wheel pair (17); a rotating disk (20) is rotatably provided at the lower part of the frame (1). The rotating disk (20) has a radial guide groove (2001) around its circumference. An electric slide rail (21) is provided below the guide groove (2001). A limit clamp (22) is slidably provided on the electric slide rail (21). The limit clamp (22) slides along the trajectory of the guide groove (2001). A second motor (19) is installed on the frame (1). A second gear pair (23) is provided between the output shaft of the second motor (19) and the outer wall of the rotating disk (20).

2. The plastic bottle cold water nozzle scrap shearing device according to claim 1, characterized in that: An adjusting screw (51) is rotatably connected inside the blocking frame (5), and the adjusting screw (51) is threadedly connected to the upper part of the frame (1).

3. The plastic bottle cold water nozzle scrap shearing device according to claim 1, characterized in that: The guide plate (121) has a positioning groove (1211) evenly spaced along its axial direction on the side facing the sliding plate (131), and the sliding plate (131) has positioning beads evenly spaced along its axial direction on the side facing the guide plate (121). The positioning beads are engaged with the positioning groove (1211).

4. The plastic bottle cold water nozzle scrap shearing device according to claim 1, characterized in that: A second return spring (15) is provided between the upper ring frame (12) and the lower ring frame (13).

5. The plastic bottle cold water nozzle scrap shearing device according to claim 1, characterized in that: A V-shaped fixture (18) is mounted on the frame (1).

6. A plastic bottle cold water nozzle scrap shearing device according to any one of claims 1-5, characterized in that: It also includes a vision sensor (25) and a controller. The vision sensor (25) is installed on the connecting crossbeam (4). The vision sensor (25) faces the bottle mouth (102). The vision sensor (25) is used to monitor whether the cross-shaped cold water nozzle (103) inside the bottle mouth (102) is misaligned with the hollow tube (10). The controller is electrically connected to the vision sensor (25), the punching cylinder (2), the first motor (16), the second motor (19), and the electric slide rail (21).

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