Double-layer turntable intermittent rotary full-automatic high-speed bottle blowing machine

Abstract

The utility model belongs to the technical field of bottle blowing machines, and relates to a double-layer turntable intermittent rotary full-automatic high-speed bottle blowing machine. The bottle blowing device comprises a bottle blowing machine upper fixing frame and a bottle blowing machine lower fixing frame, and a fixed material clamping plate seat and a sliding material clamping plate seat capable of doing reciprocating rectilinear motion along one end close to or far away from the fixed material clamping plate seat are arranged between the bottle blowing machine upper fixing frame and the bottle blowing machine lower fixing frame. And a bottom supporting piece and a bottle blowing piece which can do reciprocating rectilinear motion in the vertical direction are arranged between the fixed material clamping plate seat and the sliding material clamping plate seat. The intermittent reciprocating motion of the sliding type material clamping plate seat is realized through the matching of the rotating arm connecting driving piece and the transverse moving sliding plate, the structural design is simple and stable, the intermittent reciprocating motion can be efficiently matched with other operation steps of the bottle blowing machine, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of blow molding machine technology, and relates to a double-layer turntable intermittent rotary fully automatic high-speed blow molding machine. Background Technology

[0002] Existing blow molding technology, particularly traditional blow molding machines, has limitations in production efficiency, stability, and adaptability to preforms. For example, some blow molding machines have inflexible clamping structures, making it difficult to quickly and accurately clamp preforms; the support of the preform's bottom and the coordination of the blowing operation are not precise enough, easily leading to poor bottle quality; and the power connection structure is not stable enough, making the equipment prone to malfunctions during operation and affecting production efficiency. Therefore, there is an urgent need to design a double-layer rotary intermittent fully automatic high-speed blow molding machine that can overcome the above defects.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a high-speed PET bottle blowing machine [application number: 201710809533.8], which includes an upper template, Green columns, a core injection moving plate, a turntable frame, a lower template, a blow molding cylinder seat, a frame, a turntable, sheet metal, and a blowing machine body. The top of the blowing machine body is equipped with a lower template, Green columns are provided on both sides of the lower template, the top of the Green columns is equipped with an upper template, the bottom of the upper template is equipped with a core injection moving plate, the bottom of the core injection moving plate is equipped with a turntable frame, the turntable frame is equipped with a turntable in the middle, and the bottom of the lower template is equipped with a blow molding cylinder seat. However, the clamping structure of this solution is still not flexible enough, making it difficult to clamp the preform quickly and accurately; the support of the bottom of the preform and the coordination of the blowing operation during the blowing process are still not precise enough, which can easily lead to poor bottle molding quality; there is also a defect that the power connection structure is not stable enough, making the equipment prone to failure during operation and affecting production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a double-layer turntable intermittent rotary fully automatic high-speed blow molding machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A double-layer rotary intermittent fully automatic high-speed blow molding machine includes an upper fixed frame and a lower fixed frame. A fixed clamping plate seat and a sliding clamping plate seat that can reciprocate linearly along one end near or away from the fixed clamping plate seat are provided between the upper and lower fixed frames. A bottom support and a blow molding component that can reciprocate linearly in the vertical direction are provided between the fixed clamping plate seat and the sliding clamping plate seat. The bottom support and the blow molding component are arranged opposite each other. An intermittent reciprocating power connection structure for driving the sliding clamping plate seat to move laterally is provided at the end away from the fixed clamping plate seat.

[0007] In the above-mentioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, the intermittent reciprocating power connection structure includes a transverse sliding plate disposed at one end of the sliding clamping plate seat away from the fixed clamping plate seat. A rotating arm connecting drive is provided between the transverse sliding plate and the sliding clamping plate seat. One end of the rotating arm connecting drive is rotatably connected to the transverse sliding plate, and the other end is rotatably connected to the sliding clamping plate seat.

[0008] In the above-mentioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, the transverse sliding plate and the sliding clamping plate seat are respectively slidably engaged with the fixed frame on the blow molding machine.

[0009] In the above-mentioned double-layer rotary intermittent fully automatic high-speed blow molding machine, the rotating arm connecting drive includes two sets of single-arm rotating parts and two sets of double-arm rotating parts. Each set of single-arm rotating parts consists of two single-arm rotating plates, and each set of double-arm rotating parts consists of two double-arm rotating plates. The single-arm rotating plates are rotatably connected to the sliding clamping plate seat, and the double-arm rotating plates are rotatably connected to the transverse sliding plate.

[0010] In the above-mentioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, two vertical side plates are provided between the upper fixed frame and the lower fixed frame of the blow molding machine. Two vertical sliding grooves are opened in the vertical side plates. The coupling between the single-arm rotating part and the double-arm rotating part slides in cooperation with the vertical sliding grooves.

[0011] In the above-mentioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, the bottom of the fixed frame of the blow molding machine is provided with anti-deviation protrusions. The transverse sliding plate and the sliding clamping plate seat are respectively slidably engaged with the anti-deviation protrusions. The fixed clamping plate seat, the transverse sliding plate and the sliding clamping plate seat are connected in series by four horizontal shafts.

[0012] In the above-mentioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, a motor is provided at the bottom of the lower fixed frame of the blow molding machine, and a connecting rod swing arm is connected to the rotating shaft of the motor. The connecting rod swing arm is connected to the coupling between the single-arm rotating part and the double-arm rotating part.

[0013] In the aforementioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, positioning strips are respectively provided on the inner sides of the fixed clamping plate seat and the sliding clamping plate seat.

[0014] In the above-mentioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, the bottom support includes a support base plate and a cylinder set on the lower fixed frame of the blow molding machine.

[0015] In the above-mentioned double-layer turntable intermittent rotary fully automatic high-speed blow molding machine, the blow molding component includes a blow molding tube lifting plate and a cylinder mounted on the upper fixed frame of the blow molding machine. The bottom of the blow molding tube lifting plate is provided with two blow molding tubes. The upper fixed frame of the blow molding machine is provided with an alignment plate. A spring is provided between the alignment plate and the blow molding tube lifting plate. Two alignment holes are opened in the alignment plate. The blow molding tubes are arranged opposite to the alignment holes.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model achieves intermittent reciprocating motion of the sliding clamping plate seat through the cooperation of the rotating arm connecting drive and the transverse sliding plate. This structural design is simple and stable, and can be efficiently coordinated with other operating steps of the blow molding machine, thereby improving production efficiency.

[0018] 2. The opposing arrangement of the bottom support and the blow molding component in this invention, along with their respective cylinder drive structures, enables accurate support and blowing of the preform during the blow molding process, ensuring the molding quality of the bottle. Furthermore, the design of the spring and alignment hole in the blow molding component further enhances the accuracy and stability of the blow molding process.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a structural schematic diagram of another aspect of this utility model.

[0022] Figure 3 This is a partial structural schematic diagram of the present invention.

[0023] Figure 4 This is a partial structural schematic diagram of another aspect of this utility model.

[0024] In the diagram: 1. Upper fixed frame of blow molding machine; 2. Lower fixed frame of blow molding machine; 3. Fixed clamping plate seat; 4. Sliding clamping plate seat; 5. Bottom support; 6. Blow molding component; 7. Intermittent reciprocating power connection structure; 8. Lateral sliding plate; 9. Rotary arm connection drive component; 10. Single arm rotating part; 11. Double arm rotating part; 12. Vertical side plate; 13. Vertical slide groove; 14. Anti-deviation protrusion; 15. Motor; 16. Connecting rod swing arm; 17. Positioning strip; 18. Supporting bottom plate; 19. Blow molding tube lifting plate; 20. Blow molding tube; 21. Alignment plate; 22. Spring; 23. Alignment hole. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a double-layer rotary intermittent fully automatic high-speed blow molding machine includes an upper fixed frame 1 and a lower fixed frame 2. A fixed clamping plate seat 3 and a sliding clamping plate seat 4 that can reciprocate linearly along one end close to or away from the fixed clamping plate seat 3 are provided between the upper fixed frame 1 and the lower fixed frame 2. A bottom support 5 and a blow molding component 6 that can reciprocate linearly along the vertical direction are provided between the fixed clamping plate seat 3 and the sliding clamping plate seat 4. The bottom support 5 and the blow molding component 6 are arranged opposite each other. An intermittent reciprocating power connection structure 7 for driving the sliding clamping plate seat 4 to move laterally is provided at the end away from the fixed clamping plate seat 3.

[0027] In this embodiment, during use, the preform to be blown is placed between the fixed clamping plate seat 3 and the sliding clamping plate seat 4. The fixed clamping plate seat 3 and the sliding clamping plate seat 4 fix the preform to be blown. At this time, the blowing component 6 moves downward and completes the blowing process on the preform. After the blowing is completed, the fixed clamping plate seat 3 and the sliding clamping plate seat 4 move away from each other. At this time, the bottom support 5 supports the bottle body after the blowing is completed. The sliding clamping plate seat 4 clamps and releases the material through the intermittent reciprocating power connection structure 7, realizing accurate clamping, stable support and efficient blowing of the preform. The coordinated work of each component improves the quality and efficiency of blowing.

[0028] Combination Figure 1-4 As shown, the intermittent reciprocating power connection structure 7 includes a transverse sliding plate 8 disposed at one end of the sliding clamping plate seat 4 away from the fixed clamping plate seat 3. A rotating arm connecting drive 9 is provided between the transverse sliding plate 8 and the sliding clamping plate seat 4. One end of the rotating arm connecting drive 9 is rotatably connected to the transverse sliding plate 8, and the other end is rotatably connected to the sliding clamping plate seat 4.

[0029] Specifically, the power source drives the transverse sliding plate 8 to move laterally, and the rotating arm connecting drive 9 rotates as the transverse sliding plate 8 moves. At the same time, this rotation is converted into the transverse linear motion of the sliding clamping plate seat 4, so that the sliding clamping plate seat 4 moves closer to or away from the fixed clamping plate seat 3. The rotational connection method of the rotating arm connecting drive 9 enables the motion of the transverse sliding plate 8 to be smoothly transmitted to the sliding clamping plate seat 4, realizing intermittent reciprocating motion, which helps to accurately coordinate with other processes of the blow molding machine and improve the overall production efficiency.

[0030] The transverse sliding plate 8 and the sliding clamping plate seat 4 are respectively slidably engaged with the fixed frame 1 on the blow molding machine.

[0031] In this embodiment, the sliding cooperation with the fixed frame 1 on the blow molding machine ensures the accuracy of the movement trajectory of the transverse sliding plate 8 and the sliding clamping plate seat 4, making the clamping of the preform more precise and improving the molding quality of the bottle.

[0032] Combination Figure 3 , Figure 4 As shown, the rotating arm connecting drive component 9 includes two sets of single-arm rotating parts 10 and two sets of double-arm rotating parts 11. Each set of single-arm rotating parts 10 consists of two single-arm rotating plates, and each set of double-arm rotating parts 11 consists of two double-arm rotating plates. The single-arm rotating plates are rotatably connected to the sliding clamping plate seat 4, and the double-arm rotating plates are rotatably connected to the transverse sliding plate 8.

[0033] In this embodiment, when the transverse sliding plate 8 moves laterally, the double-arm rotating part 11 rotates with the transverse sliding plate 8. Through the linkage between the single-arm rotating part 10 and the double-arm rotating part 11, the motion is transmitted to the single-arm rotating part 10, which in turn drives the sliding clamping plate seat 4 to perform transverse reciprocating motion. The multi-rotating plate structure design makes the rotating arm connecting drive 9 more stable when transmitting motion, and can adapt to different motion speeds and load changes. At the same time, it increases the flexibility of motion and ensures the smoothness and accuracy of the movement of the sliding clamping plate seat 4.

[0034] Two vertical side plates 12 are provided between the upper fixed frame 1 and the lower fixed frame 2 of the blow molding machine. Two vertical sliding grooves 13 are provided in the vertical side plates 12. The coupling between the single-arm rotating part 10 and the double-arm rotating part 11 is slidably engaged with the vertical sliding grooves 13.

[0035] In this embodiment, during the movement of the rotating arm connecting drive 9, the coupling between the single-arm rotating part 10 and the double-arm rotating part 11 slides within the vertical slide groove 13, thereby restricting the movement direction of the rotating arm connecting drive 9 and making it move only along the trajectory specified by the vertical slide groove 13. The guiding effect of the vertical slide groove 13 makes the movement of the rotating arm connecting drive 9 more precise, reduces deviations and shaking during the movement, improves the stability of the sliding clamping plate seat 4, and thus ensures the accuracy of preform clamping.

[0036] Combination Figure 3-4 As shown, the bottom of the fixed frame 1 of the blow molding machine is provided with an anti-deviation protrusion 14. The transverse sliding plate 8 and the sliding clamping plate seat 4 are respectively slidably engaged with the anti-deviation protrusion 14. The fixed clamping plate seat 3, the transverse sliding plate 8 and the sliding clamping plate seat 4 are connected in series by four horizontal shafts.

[0037] In this embodiment, the transverse sliding plate 8 and the sliding clamping plate seat 4 slide along the anti-deviation protrusion 14 during movement, and are simultaneously connected to the fixed clamping plate seat 3 via four horizontal shafts. This interconnects and restricts the movements of the three components, and the anti-deviation protrusion 14 prevents the transverse sliding plate 8 and the sliding clamping plate seat 4 from shifting, ensuring the positional accuracy of the bottle preform clamping. The series structure of the four horizontal shafts makes the movements of each component more synchronized and coordinated, improving the stability and reliability of the entire clamping system.

[0038] The bottom of the lower fixed frame 2 of the blow molding machine is equipped with a motor 15. A connecting rod swing arm 16 is connected to the rotating shaft of the motor 15. The connecting rod swing arm 16 is connected to the coupling between the single-arm rotating part 10 and the double-arm rotating part 11.

[0039] In this embodiment, after the motor 15 starts, its rotating shaft drives the connecting rod swing arm 16 to swing. The swing of the connecting rod swing arm 16 is connected to the coupling between the single arm rotating part 10 and the double arm rotating part 11, and transmits the power to the rotating arm connecting drive 9, thereby driving the transverse sliding plate 8 and the sliding clamping plate seat 4 to move. The motor 15 provides stable power, and the connecting rod swing arm 16 converts the circular motion of the motor into the swing motion suitable for the rotating arm connecting drive 9, realizing the effective transmission of power and ensuring the intermittent reciprocating motion of the sliding clamping plate seat 4, providing power support for the efficient operation of the blow molding machine.

[0040] Combination Figure 1-2 As shown, positioning strips 17 are respectively provided on the inner side of the fixed clamping plate seat 3 and the sliding clamping plate seat 4.

[0041] In this embodiment, when the preform is placed between the fixed clamping plate seat 3 and the sliding clamping plate seat 4, the positioning strip 17 contacts the preform and fixes the preform in a specific position, so that the preform will not be displaced during the clamping and blowing process. The setting of the positioning strip 17 improves the positioning accuracy of the preform and ensures the positional stability of the preform during the blowing process, thereby improving the molding quality of the bottle and reducing the defect rate.

[0042] Combination Figure 1-2 As shown, the bottom support 5 includes a support base plate 18 and a cylinder disposed on the lower fixed frame 2 of the blow molding machine.

[0043] In this embodiment, after the preform is clamped, the cylinder pushes the supporting base plate 18 to rise to the bottom of the preform to support it. After the bottle blowing is completed, the cylinder drives the supporting base plate 18 to descend, providing space for removing the molded bottle. The bottom support 5 ensures that the bottom of the preform is stably supported during the bottle blowing process, preventing the preform from deforming under high pressure and ensuring the molding quality of the bottle.

[0044] Combination Figure 1-2 As shown, the blow molding component 6 includes a blow molding tube lifting plate 19 and a cylinder mounted on the upper frame 1 of the blow molding machine. The bottom of the blow molding tube lifting plate 19 is provided with two blow molding tubes 20. The upper frame 1 of the blow molding machine is provided with an alignment plate 21. A spring 22 is provided between the alignment plate 21 and the blow molding tube lifting plate 19. The alignment plate 21 has two alignment holes 23. The blow molding tubes 20 are positioned opposite to the alignment holes 23.

[0045] In this embodiment, when blow molding is required, the cylinder drives the blow molding tube lifting plate 19 to descend, and the blow molding tube 20 passes through the alignment hole 23 and is inserted into the preform. The spring 22 acts as a buffer during the descent of the blow molding tube lifting plate 19, preventing the blow molding tube 20 from colliding hard with the preform. After blow molding is complete, the cylinder drives the blow molding tube lifting plate 19 to rise, and the blow molding tube 20 is pulled out of the preform. The buffering effect of the spring 22 protects both the preform and the blow molding tube 20, extending the service life of the equipment. The alignment hole 23 ensures the accuracy of the insertion position of the blow molding tube 20, making the blow molding process more stable and improving the molding quality and blow molding efficiency of the bottle.

[0046] The working principle of this utility model is as follows:

[0047] In practical use, the preform is first placed between the fixed clamping plate seat 3 and the sliding clamping plate seat 4. The positioning strip 17 positions the preform. Then, the motor 15 starts and drives the single-arm rotating part 10 and the double-arm rotating part 11 to move through the connecting rod swing arm 16. This drives the transverse sliding plate 8 and the sliding clamping plate seat 4 to approach the fixed clamping plate seat 3 and clamp the preform. At this time, the cylinder of the bottom support 5 drives the support base plate 18 to rise and support the bottom of the preform. Then, the cylinder of the blow bottle part 6 drives the blow bottle tube lifting plate 19 to fall. The blow bottle tube 20 is inserted into the preform through the alignment hole 23 to blow air and form the preform. After the blow bottle is completed, the cylinder of the bottom support 5 drives the support base plate 18 to fall. The motor 15 continues to work and drives the sliding clamping plate seat 4 away from the fixed clamping plate seat 3, releasing the formed bottle and completing one blow bottle process. This cycle is repeated to achieve continuous blow bottle production.

[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0049] Although this article frequently uses terms such as upper fixed frame 1, lower fixed frame 2, fixed clamping plate seat 3, sliding clamping plate seat 4, bottom support 5, blowing component 6, intermittent reciprocating power connection structure 7, transverse sliding plate 8, rotating arm connection drive component 9, single arm rotating part 10, double arm rotating part 11, vertical side plate 12, vertical slide groove 13, anti-deviation protrusion 14, motor 15, connecting rod swing arm 16, positioning strip 17, supporting bottom plate 18, blowing tube lifting plate 19, blowing tube 20, alignment plate 21, spring 22, alignment hole 23, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A double-layer rotary intermittent rotary full-automatic high-speed bottle blowing machine, comprising a bottle blowing machine upper fixing frame (1) and a bottle blowing machine lower fixing frame (2), characterized in that, The fixed frame (1) and the lower fixed frame (2) of the bottle blowing machine are provided with a fixed clamping plate seat (3) and a sliding clamping plate seat (4) which can reciprocate linearly towards or away from one end of the fixed clamping plate seat (3), the fixed clamping plate seat (3) and the sliding clamping plate seat (4) are provided with a bottom supporting piece (5) and a bottle blowing piece (6) which can reciprocate linearly in the vertical direction, the bottom supporting piece (5) and the bottle blowing piece (6) are arranged opposite to each other, and the sliding clamping plate seat (4) is provided with an intermittent reciprocating power connection structure (7) for driving the sliding clamping plate seat (4) to move horizontally at one end away from the fixed clamping plate seat (3).

2. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 1, characterized in that, The intermittent reciprocating power connection structure (7) comprises a horizontal moving slide plate (8) arranged at one end of the sliding clamping plate seat (4) away from the fixed clamping plate seat (3), and a rotating arm connecting driving piece (9) is arranged between the horizontal moving slide plate (8) and the sliding clamping plate seat (4), one end of the rotating arm connecting driving piece (9) is rotatably connected with the horizontal moving slide plate (8), and the other end is rotatably connected with the sliding clamping plate seat (4).

3. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 2, characterized in that, The horizontal moving slide plate (8) and the sliding clamping plate seat (4) are respectively slidably connected with the upper fixed frame (1) of the bottle blowing machine.

4. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 3, characterized in that, The rotating arm connecting driving piece (9) comprises two groups of single-arm rotating parts (10) and two groups of double-arm rotating parts (11), each group of single-arm rotating part (10) is composed of two single-arm rotating plates, and each group of double-arm rotating part (11) is composed of two double-arm rotating plates, the single-arm rotating plate is rotatably connected with the sliding clamping plate seat (4), and the double-arm rotating plate is rotatably connected with the horizontal moving slide plate (8).

5. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 4, characterized in that, Two vertical side plates (12) are arranged between the upper fixed frame (1) and the lower fixed frame (2) of the bottle blowing machine, two vertical sliding grooves (13) are formed in the vertical side plates (12), and the shafts between the single-arm rotating parts (10) and the double-arm rotating parts (11) are slidably connected with the vertical sliding grooves (13).

6. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 5, characterized in that, A bias prevention convex strip (14) is arranged at the bottom of the upper fixed frame (1) of the bottle blowing machine, the horizontal moving slide plate (8) and the sliding clamping plate seat (4) are respectively slidably connected with the bias prevention convex strip (14), and the fixed clamping plate seat (3), the horizontal moving slide plate (8) and the sliding clamping plate seat (4) are connected in series through four horizontal shafts.

7. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 6, characterized in that, A motor (15) is arranged at the bottom of the lower fixed frame (2) of the bottle blowing machine, a connecting rod swing arm (16) is connected to the rotating shaft of the motor (15), and the connecting rod swing arm (16) is connected with the shafts between the single-arm rotating parts (10) and the double-arm rotating parts (11).

8. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 7, characterized in that, Positioning strips (17) are arranged on the inner sides of the fixed clamping plate seat (3) and the sliding clamping plate seat (4).

9. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 8, characterized in that, The bottom supporting piece (5) comprises a supporting bottom plate (18) arranged on the lower fixed frame (2) of the bottle blowing machine and a gas cylinder.

10. The double-deck carousel intermittent rotary full-automatic high-speed bottle blowing machine according to claim 9, characterized in that, The bottle blowing piece (6) comprises a bottle blowing tube lifting plate (19) and a cylinder arranged on a bottle blowing machine fixing frame (1), the bottom of the bottle blowing tube lifting plate (19) is provided with two bottle blowing tubes (20), the bottle blowing machine fixing frame (1) is internally provided with a positioning plate (21), the positioning plate (21) and the bottle blowing tube lifting plate (19) are provided with a spring (22) therebetween, the positioning plate (21) is internally provided with two positioning holes (23), and the bottle blowing tube (20) is arranged opposite to the positioning hole (23).

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