A bottle neck cutting device for blow molding of plastic bottles

Abstract

This utility model discloses a bottle neck cutting device for blow molding of plastic bottles, belonging to the field of plastic bottle production technology. It includes a mounting frame, with an air inlet pipe at the top. One end of the air inlet pipe is closed, and the other end is equipped with an air pump. The output end of the air pump is connected to the air inlet pipe. An annular air bladder is provided on the outer side of the closed end of the air inlet pipe. The inner wall of the annular air bladder is fixed to the outer wall of the air inlet pipe. An air inlet hole is provided on the air inlet pipe, communicating with the interior of the annular air bladder. The air pump injects air into the air inlet pipe, causing the annular air bladder to expand and press against the inner wall of the bottle neck. An annular cutting component is provided on the outer wall of the air inlet pipe for cutting the bottle neck above the annular air bladder. This technical solution provides internal support for the portion of the bottle neck that does not need to be cut, preventing deformation during cutting and thus avoiding a deterioration in cutting results.

Description

Technical Field

[0001] This utility model belongs to the field of plastic bottle production technology, specifically relating to a bottle mouth cutting device for plastic bottle blow molding. Background Technology

[0002] Currently, most plastic bottle processing and production processes use hollow blow molding. In this type of processing, after the plastic bottle is mechanically blow-molded, there is excess material left at the bottle mouth, which needs to be cut off to make it more aesthetically pleasing.

[0003] In the prior art, as shown in the plastic bottle blow molding bottle mouth cutting device with patent number CN201521117517.5, the bottle mouth is cut in a ring by rotating the blade. However, in this method, when cutting some thinner or not fully hardened plastic bottles, the lateral cutting torque will cause the bottle mouth of the part that does not need to be cut to be squeezed and deformed, resulting in poor cutting effect. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a bottle mouth cutting device for blow molding of plastic bottles, which can provide internal support for the bottle mouth of the part that does not need to be cut, so as to avoid deformation during cutting and thus reduce the cutting effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A plastic bottle blow molding bottle neck cutting device includes a mounting frame. An air inlet pipe is located at the top of the mounting frame. One end of the air inlet pipe is closed, and the other end is equipped with an air pump. The output end of the air pump is connected to the air inlet pipe. An annular air bladder is provided on the outer side of the closed end of the air inlet pipe. The inner wall of the annular air bladder is fixed to the outer wall of the air inlet pipe. An air inlet hole is provided on the air inlet pipe, communicating with the interior of the annular air bladder. The air pump injects air into the air inlet pipe, causing the annular air bladder to expand and press against the inner wall of the plastic bottle neck. An annular cutting component is provided on the outer wall of the air inlet pipe for cutting the bottle neck of the plastic bottle above the annular air bladder.

[0007] Furthermore, the annular cutting assembly includes a turntable, a bearing is provided in the middle of the turntable, the bearing rotatably connects the turntable to the outer wall of the air intake pipe, a connecting post is provided on the edge of the turntable, one end of the connecting post is connected to the turntable, and the other end of the connecting post is provided with a blade, and a drive structure for driving the turntable to rotate is provided on the outer wall of the air intake pipe.

[0008] Furthermore, the drive structure includes a fixed plate, one end of which is fixed to the air intake pipe, and a drive motor is provided on the other end of the fixed plate. A drive gear is provided on the output end of the drive motor, and a driven gear is provided in the middle of the turntable. The drive gear and the driven gear are meshed together.

[0009] Furthermore, the turntable is provided with a rectangular groove, the connecting post is located in the rectangular groove, and the outer wall of the connecting post is provided with external threads. Locking nuts are provided at both ends of the connecting post located in the rectangular groove.

[0010] Furthermore, the connecting column is provided with a collar, the collar is provided with a sliding column, one end of the sliding column is fixed to the collar, the other end of the sliding column is provided through the end of the rectangular groove and is slidably connected to the turntable, the edge of the turntable is provided with a reaction frame, the reaction frame is provided with a force application element, one end of the force application element is fixed to the reaction frame, and the other end is connected to the sliding column.

[0011] Furthermore, the force-applying element is one of a spring, a hydraulic push rod, or a pneumatic push rod.

[0012] The beneficial effects of this utility model are as follows:

[0013] In this technical solution, when cutting a plastic bottle, the bottle mouth is fitted onto the annular airbag, the position of the part to be cut is adjusted to be above the annular airbag, and then air is injected into the annular airbag by an air pump, causing the annular airbag to expand. In turn, the annular airbag supports the uncut part of the bottle mouth, avoiding the problem of deformation of the uncut part of the bottle mouth under the action of extrusion torque during cutting, thereby improving the bottle mouth cutting effect.

[0014] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0016] Figure 1 This is a three-dimensional schematic diagram of the bottle neck cutting device of this utility model;

[0017] Figure 2 This is a three-dimensional schematic diagram of the bottle neck cutting device of this utility model after the mounting frame has been removed;

[0018] Figure 3This is a schematic cross-sectional view of the bottle neck cutting device of this utility model after the mounting bracket has been removed.

[0019] The following labels are shown in the attached diagram:

[0020] 1. Mounting frame; 2. Lifting platform; 3. Limiting mold; 4. Plastic bottle; 5. Air inlet pipe; 6. Annular airbag; 7. Air inlet; 8. Turntable; 9. Bearing; 10. Driven gear; 11. Driving gear; 12. Fixing plate; 13. Drive motor; 14. Rectangular groove; 15. Connecting column; 16. Locking screw; 17. Reaction frame; 18. Sliding column; 19. Force-applying element; 20. Collar; 21. Blade. Detailed Implementation

[0021] like Figures 1-3 As shown, a plastic bottle blow molding bottle neck cutting device includes a mounting frame 1. The upper part of the mounting frame 1 is provided with an air inlet pipe 5. One end of the air inlet pipe 5 is closed, and the other end of the air inlet pipe 5 is provided with an air pump (not shown). The output end of the air pump is connected to the air inlet pipe 5. An annular airbag 6 is provided on the outer side of the closed end of the air inlet pipe 5. The inner wall of the annular airbag 6 is fixed to the outer wall of the air inlet pipe 5. An air inlet hole 7 is provided on the air inlet pipe 5. The air inlet hole 7 is connected to the interior of the annular airbag 6. The air pump injects air into the air inlet pipe 5, causing the annular airbag 6 to expand and press against the inner wall of the bottle neck of the plastic bottle 4. An annular cutting component is provided on the outer wall of the air inlet pipe 5. The annular cutting component is used to cut the bottle neck of the plastic bottle 4 above the annular airbag 6.

[0022] The working principle of this technical solution is as follows:

[0023] When cutting the plastic bottle 4, the bottle mouth of the plastic bottle 4 is fitted onto the annular airbag 6. The position of the part to be cut is adjusted to be above the annular airbag 6. Then, air is injected into the annular airbag 6 through the air pump, causing the annular airbag 6 to expand. The annular airbag 6 then supports the uncut part of the bottle mouth, preventing the uncut part of the bottle mouth from deforming under the action of the extrusion torque during cutting, thereby improving the bottle mouth cutting effect.

[0024] In one feasible embodiment, the annular cutting assembly includes a turntable 8, a bearing 9 at the center of the turntable 8, the bearing 9 rotatably connecting the turntable 8 to the outer wall of the air intake pipe 5, a connecting post 15 at the edge of the turntable 8, one end of the connecting post 15 being connected to the turntable 8, and a blade 21 at the other end of the connecting post 15, and a drive structure for driving the turntable 8 to rotate is provided on the outer wall of the air intake pipe 5.

[0025] In one feasible embodiment, the drive structure includes a fixed plate 12, one end of which is fixed to the air intake pipe 5, and a drive motor 13 is provided on the other end of the fixed plate 12. A drive gear 11 is provided on the output end of the drive motor 13, and a driven gear 10 is provided in the middle of the turntable 8. The drive gear 11 and the driven gear 10 are meshed together.

[0026] The drive motor 13 rotates, which drives the drive gear 11 to rotate, which in turn drives the driven gear 10 to rotate, which in turn drives the turntable 8 to rotate, which in turn drives the blade 21 to rotate, thus enabling the blade 21 to rotate and achieve a ring cut on the bottle opening.

[0027] In one feasible embodiment, the turntable 8 is provided with a rectangular groove 14, the connecting post 15 is located in the rectangular groove 14, and the outer wall of the connecting post 15 is provided with external threads. Locking nuts 16 are provided at both ends of the connecting post 15 located in the rectangular groove 14.

[0028] By adjusting the position of the locking nut 16, the distance between the blade 21 and the turntable 8 can be adjusted, thereby adjusting the cutting length of the bottle mouth and increasing the cutting length range.

[0029] In one feasible embodiment, a collar 20 is provided on the connecting column 15, and a sliding column 18 is provided on the collar 20. One end of the sliding column 18 is fixed to the collar 20, and the other end of the sliding column 18 is provided through the end of the rectangular groove 14 and is slidably connected to the turntable 8. A reaction frame 17 is provided on the edge of the turntable 8, and a force-applying element 19 is provided on the reaction frame 17. One end of the force-applying element 19 is fixed to the reaction frame 17, and the other end is connected to the sliding column 18.

[0030] The force-applying element 19 can apply a lateral torque to the connecting column 15, which can then serve as a feed torque, enabling the blade 21 to cut more effectively into the inside of the bottle opening.

[0031] In one feasible embodiment, the force-applying element 19 is one of a spring, a hydraulic push rod, or a pneumatic push rod. It is readily understood that in this technical solution, components such as air pipes, hydraulic pipes, and wires can be connected using existing pneumatic slip rings, thereby preventing the wires or air pipes from becoming entangled when the turntable 8 rotates.

[0032] It is easy to understand that the mounting frame 1 is also equipped with a lifting platform 2, and the lifting platform 2 is equipped with a limiting mold 3 for limiting the plastic bottle 4 (the limiting block has a limiting hole in the middle for placing the plastic bottle 4). This setting method eliminates the need for workers to hold the plastic bottle 4 for cutting operations, further ensuring the safety and efficiency of cutting.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A plastic bottle blow molding finish cutting apparatus characterized by: The device includes a mounting bracket (1), an air inlet pipe (5) on the upper part of the mounting bracket (1), one end of the air inlet pipe (5) is closed, and the other end of the air inlet pipe (5) is equipped with an air pump. The output end of the air pump is connected to the air inlet pipe (5). An annular airbag (6) is provided on the outer side of the closed end of the air inlet pipe (5). The inner wall of the annular airbag (6) is fixed to the outer wall of the air inlet pipe (5). An air inlet hole (7) is provided on the air inlet pipe (5). The air inlet hole (7) and the interior of the annular airbag (6) are connected. The air pump injects air into the air inlet pipe (5) so that the annular airbag (6) expands and presses against the inner wall of the bottle mouth of the plastic bottle (4). An annular cutting component is provided on the outer wall of the air inlet pipe (5). The annular cutting component is used to cut the bottle mouth of the plastic bottle (4) above the annular airbag (6).

2. A device for cutting the finish of a plastic bottle formed by blow molding, according to claim 1, characterized in that: The annular cutting assembly includes a turntable (8), a bearing (9) is provided in the middle of the turntable (8), the bearing (9) rotatably connects the turntable (8) to the outer wall of the air intake pipe (5), a connecting post (15) is provided on the edge of the turntable (8), one end of the connecting post (15) is connected to the turntable (8), and the other end of the connecting post (15) is provided with a blade (21). The outer wall of the air intake pipe (5) is provided with a driving structure for driving the turntable (8) to rotate.

3. The bottle neck cutting device for blow molding of plastic bottles according to claim 2, characterized in that: The drive structure includes a fixed plate (12), one end of which is fixed to the air intake pipe (5), and the other end of which is provided with a drive motor (13). The output end of the drive motor (13) is provided with a drive gear (11), and the middle part of the turntable (8) is provided with a driven gear (10). The drive gear (11) and the driven gear (10) are meshed together.

4. A device for cutting the finish of a plastic bottle formed by blow molding, according to claim 2, characterized in that: The turntable (8) is provided with a rectangular groove (14), the connecting post (15) is located in the rectangular groove (14), and the outer wall of the connecting post (15) is provided with an external thread. The connecting post (15) is provided with locking nuts (16) at both ends of the rectangular groove (14).

5. A device for cutting the finish of a plastic bottle formed by blow molding a plastic parison, according to claim 4, wherein: The connecting column (15) is provided with a collar (20), and the collar (20) is provided with a sliding column (18). One end of the sliding column (18) is fixed to the collar (20), and the other end of the sliding column (18) is provided through the end of the rectangular groove (14) and is slidably connected to the turntable (8). The edge of the turntable (8) is provided with a reaction frame (17), and the reaction frame (17) is provided with a force-applying element (19). One end of the force-applying element (19) is fixed to the reaction frame (17), and the other end is connected to the sliding column (18).

6. A device for cutting the finish of a plastic bottle formed by blow molding a plastic parison, according to claim 5, characterized in that: The force-applying element (19) is one of a spring, a hydraulic push rod, or a pneumatic push rod.

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