Blowing blocking device

Abstract

The invention discloses an air blowing blocking device which comprises a pneumatic sealing die holder, the bottom of the pneumatic sealing die holder is fixedly connected with a core blowing die assembly, the top of the pneumatic sealing die holder is provided with a pushing assembly used for moving the position of the pneumatic sealing die holder, and the bottom of the pneumatic sealing die holder is symmetrically provided with lower lock pin fixing seats. Through the design of lock pin lower fixing seats, limiting grooves, a first lock pin opening, a second lock pin opening, positioning seats, a third lock pin opening and positioning lock pins, when the position of a core blowing mold assembly needs to be fixed, firstly, the positioning seats on the two sides of a sealing pneumatic mold seat penetrate into the limiting grooves formed in the tops of the two lock pin lower fixing seats correspondingly; then the positioning lock pin is inserted into the first lock pin opening, the second lock pin opening and the third lock pin opening, and the two ends of the positioning lock pin are limited through the first lock pin opening and the second lock pin opening, so that the positioning lock pin cannot be bent, and the situation of air leakage caused by separation of the core blowing mold assembly and the opening mold assembly is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of blow molding hollow forming machines, in particular to a blow blocking device. Background Art

[0002] Hollow blow molding is to put the preform blank into a molding mold, then introduce compressed air, and use the air pressure to deform the blank along the mold cavity, so as to blow it into a hollow product with a short neck.

[0003] The air blowing blocking device is widely used in injection stretch blow molding hollow molding machines. The currently commonly used structure is that the cylinder pushes the blow core mold seat into place, and the two cylinders on the left and right end locking pin seats each push a pin horizontally to cooperate with the pin hole of the air sealing mold seat to block the blow core mold seat to resist the upward reaction force generated during high-pressure blow molding, so that the blow core mold assembly and the mouth mold assembly remain in a locked state. When in use, one end of the pin is connected to the cylinder, and the other end is moved to the top of the blocked blow core mold seat. When the blocked blow core mold seat is moved upward by the upward reaction force, one side of the pin is driven to bend upward through the blocked blow core mold seat. After long-term use, the pin is bent, causing the blow core mold assembly and the mouth mold assembly to separate, resulting in air leakage. Summary of the invention

[0004] The object of the present invention is to provide a blowing and blocking device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a blowing blocking device, comprising an air-sealing dynamic mold base, the bottom of the air-sealing dynamic mold base is fixedly connected with a blowing core mold assembly, the top of the air-sealing dynamic mold base is provided with a pushing assembly for moving the position of the air-sealing dynamic mold base, the bottom center of the air-sealing dynamic mold base is symmetrically provided with a locking pin lower fixing seat, the top of the locking pin lower fixing seat is provided with a limiting groove, the two sides of the air-sealing dynamic mold base are symmetrically fixedly connected with positioning seats, the positioning seats are inserted and connected inside the limiting groove, a third locking pin opening is provided in the middle of the positioning seat, the inner walls of the front and back sides of the limiting groove are respectively inserted and connected with a second locking pin opening and a first locking pin opening, and the inner horizontal and longitudinal directions of the second locking pin opening, the third locking pin opening and the first locking pin opening are sequentially inserted and connected with positioning lock pins for fixing the position of the positioning seat.

[0006] Preferably, a movable part for moving the position of the positioning lock pin is provided at one end of the positioning lock pin, and the movable part includes a lock pin cylinder symmetrically fixedly connected to the front side of the fixing seat under the lock pin, and a lock pin piston rod is provided at the output end of the lock pin cylinder, and one end of the lock pin piston rod is fixedly connected to the back side of the positioning lock pin.

[0007] Preferably, a positioning hole is provided in the middle of the positioning seat, the third lock pin mouth is inserted and connected inside the positioning hole, a limiting groove is provided on one side of the positioning hole, the third lock pin mouth is configured as a convex ring, one end of the third lock pin mouth is inserted and connected inside the limiting groove, and an arc groove is provided on the inner wall on one side of the third lock pin mouth.

[0008] Preferably, the pushing assembly includes a pushing member and a fixing member for fixing the position of the pushing member.

[0009] Preferably, the fixing part includes a Corinthian guide column which is centrally symmetrically inserted and connected to the top of the locking pin lower fixing seat, the top of the Corinthian guide column is fixedly connected to the locking pin upper fixing seat, and the four corners of the top of the pneumatic sealing mold base are each provided with a first guide hole, and the Corinthian guide column is inserted and connected inside the first guide hole.

[0010] Preferably, a first cylinder is fixedly connected to the top of the locking pin upper fixing seat in a symmetrical manner, a first piston rod is provided at the output end of the first cylinder, and the first piston rod is fixedly connected to the top of the sealing pneumatic die seat.

[0011] Preferably, first insertion holes are symmetrically provided on both sides of the locking pin upper fixing seat, and the first piston rod is slidably inserted and connected inside the first insertion holes.

[0012] Preferably, a stretching assembly is disposed on the top of the core blowing mold assembly, a driving member for moving the position of the stretching assembly is disposed on the top of the stretching assembly, and a limiting member for limiting the moving direction of the stretching assembly is disposed on the top of the stretching assembly.

[0013] Preferably, the driving member includes a stretching cylinder fixedly connected to the top of the pneumatic sealing mold base, a stretching piston rod is provided at the output end of the stretching cylinder, and the stretching piston rod is fixedly connected to the top of the stretching assembly. The limiting member includes a guide rod fixedly connected with the center symmetrically, and the top of the pneumatic sealing mold base is centrally symmetrically interspersed with a limiting sleeve, and the guide rod is interspersed and connected inside the limiting sleeve.

[0014] Preferably, a second insertion hole is opened in the middle of the sealing pneumatic mold base, the stretching piston rod is inserted and connected inside the second insertion hole, a storage hole is opened in the middle of the locking pin upper fixed seat, the stretching cylinder is inserted and connected inside the storage hole, and second guide holes are symmetrically opened on both sides of the top of the locking pin upper fixed seat, and the guide rod is slidably inserted and connected inside the second guide hole.

[0015] Technical effects and advantages of the present invention:

[0016] The present invention adopts the design of the locking pin lower fixing seat, the limiting groove, the first locking pin opening, the second locking pin opening, the positioning seat, the third locking pin opening and the positioning locking pin. When it is necessary to fix the position of the core blowing mold assembly, the positioning seats on both sides of the air sealing dynamic mold seat are first respectively inserted into the limiting grooves provided on the tops of the two locking pin lower fixing seats, and then the positioning locking pin is inserted into the first locking pin opening, the second locking pin opening and the third locking pin opening. The two ends of the positioning locking pin are restricted by the first locking pin opening and the second locking pin opening so that it cannot be bent, thereby avoiding the separation of the core blowing mold assembly and the mouth mold assembly to cause air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front structure of the present invention.

[0018] Figure 2 This is a side sectional structural schematic diagram of the present invention.

[0019] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A.

[0020] Figure 4 For the present invention Figure 2 The enlarged structural diagram of part B is shown in the figure.

[0021] Figure 5 It is a schematic diagram of the top structure of the present invention.

[0022] Figure 6 It is a partial front cross-sectional structural schematic diagram of the present invention.

[0023] Figure 7 This is the second schematic diagram of the side sectional structure of the present invention.

[0024] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of part C in the middle.

[0025] In the figure: 1. sealing pneumatic mold base; 2. blowing core mold assembly; 3. locking pin lower fixing seat; 4. limiting groove; 5. first locking pin opening; 6. second locking pin opening; 7. positioning seat; 8. third locking pin opening; 9. positioning locking pin; 10. locking pin cylinder; 11. locking pin piston rod; 12. positioning hole; 13. limiting groove; 14. arc groove; 15. Golin guide column; 16. locking pin upper fixing seat; 17. first cylinder; 18. first piston rod; 19. stretching assembly; 20. stretching cylinder; 21. stretching piston rod; 22. guide rod; 23. second guide hole; 24. storage hole; 25. first guide hole; 26. first insertion hole; 27. second insertion hole; 28. limiting sliding sleeve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention provides Figure 1-8 The shown blowing blocking device includes an air sealing dynamic mold base 1, a blow core mold assembly 2 is fixedly connected to the bottom of the air sealing dynamic mold base 1, a pushing assembly for moving the position of the air sealing dynamic mold base 1 is arranged on the top of the air sealing dynamic mold base 1, a locking pin lower fixing seat 3 is symmetrically arranged at the center of the bottom of the air sealing dynamic mold base 1, a limiting groove 4 is provided on the top of the locking pin lower fixing seat 3, and positioning seats 7 are symmetrically fixedly connected to the two sides of the air sealing dynamic mold base 1, the positioning seats 7 are inserted and connected inside the limiting groove 4, and a third locking pin opening 8 is opened in the middle of the positioning seat 7, and the inner walls of the front and back sides of the limiting groove 4 are respectively inserted and connected with the second locking pin opening 6 and the first locking pin opening 5, and the second locking pin opening 6, the third locking pin opening 8 and the first locking pin opening 5 are inserted and connected with the positioning lock pin 9 for fixing the position of the positioning seat 7 in sequence in the horizontal and longitudinal directions.

[0028] It should be noted that the blow core mold assembly 2 is composed of a blow core and other components, wherein the blow core is the main blow molding component. During the molding process of the hollow plastic product, the blow core introduces high-pressure air through the blowing channel to fill the blank in the space between the blow core and the mold to form the wall of the hollow plastic product. Then, after cooling, demoulding and other process steps, the hollow plastic product is finally made. There are two locking pin lower fixing seats 3, which are symmetrically arranged on both sides of the air sealing dynamic mold base 1. The tops of the two locking pin lower fixing seats 3 are both provided with limit grooves 4 of the same size, and the limit grooves 4 are fixedly connected to the fixing The positioning seats 7 on both sides of the air-sealing dynamic mold base 1 are adapted, and the second lock pin opening 6, the third lock pin opening 8 and the first lock pin opening 5 are provided with pin hole blocks of the same size in the middle, and the size of the pin hole is adapted to the positioning lock pin 9. When air blowing and sealing are required, the air-sealing dynamic mold base 1 drives the blow core mold assembly 2 to move downward, so that the positioning seats 7 on both sides of the air-sealing dynamic mold base 1 penetrate into the two limit grooves 4. When the blow core mold assembly 2 moves to the required position, the centers of the second lock pin opening 6, the third lock pin opening 8 and the first lock pin opening 5 are located on the same horizontal plane, and then the positioning lock pin 9 is moved. The position of the positioning lock pin 9 is such that the positioning lock pin 9 passes through the second lock pin opening 6, the third lock pin opening 8 and the first lock pin opening 5 in sequence, so that its two ends are respectively located inside the second lock pin opening 6 and the first lock pin opening 5, and its middle part is located inside the third lock pin opening 8, so that the position of the positioning seat 7 provided with the third lock pin opening 8 is fixed by the positioning lock pin 9. When the positioning seat 7 is subjected to an upward force, the positioning seat 7 drives the third lock pin opening 8 to be pulled upward, and the third lock pin opening 8 pulls the middle part of the positioning lock pin 9 upward, which is compared with the traditional method of directly lifting one side of the lock pin upward. The positioning lock pins 9 at the fixed positions at both ends prevent one side from being lifted and bent, thereby preventing the positioning seat 7 from moving upward. The positions of the air sealing dynamic mold base 1 and the core blowing mold assembly 2 are fixed by the positioning seat 7 at the fixed position. When the core blowing mold assembly 2 is subjected to an upward reaction force, the core blowing mold assembly 2 transmits the force to the air sealing dynamic mold base 1, and the two places of the air sealing dynamic mold base 1 are restricted by the positioning seat 7, thereby preventing the core blowing mold assembly 2 from moving upward, resulting in a gap between the core blowing mold assembly 2 and the mold mouth assembly, resulting in air leakage.

[0029] Furthermore, when it is necessary to fix the position of the core blowing mold assembly 2, first insert the positioning seats 7 on both sides of the air sealing dynamic mold base 1 into the limit grooves 4 opened on the top of the two locking pin lower fixing seats 3, so that the centers of the second locking pin opening 6, the third locking pin opening 8 and the first locking pin opening 5 are located on the same horizontal line, thereby aligning the second locking pin opening 6, the third locking pin opening 8 and the first locking pin opening 5, and then insert the positioning locking pin 9 into the second locking pin opening 6, the third locking pin opening 8 and the first locking pin opening 5, so that the position of the positioning seat 7 with the third locking pin opening 8 is fixed by the positioning locking pin 9; when it is necessary to move the core blowing mold assembly 2 upward, first move the position of the positioning locking pin 9, so that one end of it moves out of the first locking pin opening 5 and the third locking pin opening 8, and moves it to the inside of the second locking pin opening 6, so that the positioning locking pin 9 is separated from the third locking pin opening 8, and then move the position of the air sealing dynamic mold base 1, and drive the core blowing mold assembly 2 to move through the air sealing dynamic mold base 1.

[0030] Specifically, one end of the positioning lock pin 9 is provided with a movable part for moving the position of the positioning lock pin 9, and the movable part includes a lock pin cylinder 10 symmetrically fixedly connected to the front side of the lock pin lower fixed seat 3, and the output end of the lock pin cylinder 10 is provided with a lock pin piston rod 11, and one end of the lock pin piston rod 11 is fixedly connected to the back side of the positioning lock pin 9.

[0031] It should be noted that the locking pin cylinder 10 is a device for generating linear motion, which uses gas to push the locking pin piston rod 11 to perform linear reciprocating motion. The function of the locking pin cylinder 10 is to convert gas energy into mechanical energy. The locking pin piston rod 11 is a component connecting the piston and the external load, and is located at one end of the locking pin cylinder 10. The end of the locking pin piston rod 11 away from the locking pin cylinder 10 is fixedly connected to the positioning locking pin 9. As the locking pin cylinder 10 is opened, the locking pin piston rod 11 is driven to move, thereby driving the positioning locking pin 9 to move through the locking pin piston rod 11.

[0032] Furthermore, when the position of the positioning lock pin 9 needs to be moved, the lock pin cylinder 10 is opened, and the lock pin piston rod 11 is driven to move by the lock pin cylinder 10. When the lock pin piston rod 11 moves, the positioning lock pin 9 fixedly connected thereto is driven to move.

[0033] Specifically, a positioning hole 12 is opened in the middle of the positioning seat 7, the third lock pin opening 8 is inserted and connected inside the positioning hole 12, a limiting groove 13 is opened on one side of the positioning hole 12, the third lock pin opening 8 is set to be a convex ring, one end of the third lock pin opening 8 is inserted and connected inside the limiting groove 13, and an arc groove 14 is opened on the inner wall of one side of the third lock pin opening 8.

[0034] It should be noted that the shape of the third lock pin opening 8 is set to be convex, and a hole for the positioning lock pin 9 to pass through is opened in the middle, and the protruding end faces the positioning lock pin 9. When the positioning lock pin 9 moves to one side of the third lock pin opening 8 and the second lock pin opening 6 is not aligned with the third lock pin opening 8, the positioning lock pin 9 pushes the third lock pin opening 8 to the side away from the positioning lock pin 9. The convex shape and the limiting groove 13 are used to prevent the third lock pin opening 8 from being pushed out of the positioning hole 12 by the positioning lock pin 9, thereby further strengthening the connection between the third lock pin opening 8 and the positioning hole 12; the arc groove 14 is located on the side of the hole of the third lock pin opening 8 facing the positioning lock pin 9. When in use, the arc-shaped setting is used to guide the positioning lock pin 9 into the interior of the third lock pin opening 8.

[0035] Specifically, the pushing assembly includes a pushing member and a fixing member for fixing the position of the pushing member.

[0036] Specifically, the fixing part includes a Corinthian guide column 15 which is centrally symmetrically inserted and connected to the top of the locking pin lower fixing seat 3, and the top of the Corinthian guide column 15 is fixedly connected to the locking pin upper fixing seat 16. The four corners of the top of the sealing pneumatic mold base 1 are all provided with first guide holes 25, and the Corinthian guide column 15 is inserted and connected inside the first guide hole 25.

[0037] It should be noted that there are four Corinthian guide columns 15 arranged in two groups, which are respectively fixedly connected to the top of the fixing seat 3 under the two locking pins. There are four first guide holes 25, which are respectively opened at the four corners of the air sealing dynamic mold base 1. When the position of the air sealing dynamic mold base 1 is moved, the air sealing dynamic mold base 1 slides on the Corinthian guide columns 15 through the first guide holes 25.

[0038] Specifically, the top of the locking pin upper fixing seat 16 is symmetrically fixedly connected with a first cylinder 17 , the output end of the first cylinder 17 is provided with a first piston rod 18 , and the first piston rod 18 is fixedly connected to the top of the sealing pneumatic mold base 1 .

[0039] It should be noted that the first cylinder 17 is a device for generating linear motion, which uses gas to push the first piston rod 18 to perform linear reciprocating motion. The function of the first cylinder 17 is to convert gas energy into mechanical energy. The first piston rod 18 is a component connecting the piston and the external load. The end of the first piston rod 18 away from the first cylinder 17 is fixedly connected to the top of the air sealing mold base 1. As the first cylinder 17 is turned on, the first piston rod 18 is driven to move, thereby driving the air sealing mold base 1 to move through the first piston rod 18.

[0040] Specifically, first insertion holes 26 are symmetrically formed on both sides of the locking pin upper fixing seat 16 , and the first piston rod 18 is slidably inserted and connected inside the first insertion holes 26 .

[0041] It should be noted that the first cylinder 17 is fixedly connected to the top of the locking pin upper fixed seat 16, and the pneumatic sealing mold base 1 is located at the bottom of the locking pin upper fixed seat 16. The first piston rod 18 passing through the first through hole 26 is used to connect the first cylinder 17 located at the top of the locking pin upper fixed seat 16 and the pneumatic sealing mold base 1 located at the bottom of the locking pin upper fixed seat 16, so that the first cylinder 17 drives the pneumatic sealing mold base 1 to move its position.

[0042] Furthermore, when the position of the core blowing mold assembly 2 needs to be moved, the first cylinder 17 is opened, and the first piston rod 18 is driven to move by the first cylinder 17, and the moving first piston rod 18 drives the sealing pneumatic mold base 1 and the core blowing mold assembly 2 at the bottom of the sealing pneumatic mold base 1 to move.

[0043] Specifically, a stretching assembly 19 is disposed on the top of the core blowing mold assembly 2 , a driving member for moving the position of the stretching assembly 19 is disposed on the top of the stretching assembly 19 , and a limiting member for limiting the moving direction of the stretching assembly 19 is disposed on the top of the stretching assembly 19 .

[0044] Specifically, the driving member includes a stretching cylinder 20 fixedly connected to the top of the sealing pneumatic mold base 1, and a stretching piston rod 21 is provided at the output end of the stretching cylinder 20. The stretching piston rod 21 is fixedly connected to the top of the stretching component 19. The limiting member includes a guide rod 22 fixedly connected with the center symmetrically. The top of the sealing pneumatic mold base 1 is centrally symmetrically interspersed with a limiting sleeve 28, and the guide rod 22 is interspersed and connected inside the limiting sleeve 28.

[0045] It should be noted that the set stretching cylinder 20 is used to drive the stretching assembly 19 to move. When the stretching assembly 19 needs to be moved, the stretching cylinder 20 is opened, and the stretching cylinder 20 drives the stretching piston rod 21 to move. The stretching assembly 19 is moved by the stretching piston rod 21. The set limiting sleeve 28 is adapted to the guide rod 22, so as to avoid the shaking of the guide rod 22 inserted and connected inside the limiting sleeve 28, so that the stretching assembly 19 cannot shake when moving.

[0046] Specifically, a second insertion hole 27 is opened in the middle of the sealing pneumatic mold base 1, and the stretching piston rod 21 is inserted and connected inside the second insertion hole 27. A storage hole 24 is opened in the middle of the locking pin upper fixed seat 16, and the stretching cylinder 20 is inserted and connected inside the storage hole 24. Second guide holes 23 are symmetrically opened on both sides of the top of the locking pin upper fixed seat 16, and the guide rod 22 is slidably inserted and connected inside the second guide hole 23.

[0047] It should be noted that the guide rod 22 is used to limit the moving direction of the stretching component 19. When the stretching component 19 moves, the guide rod 22 is driven to move by the stretching component 19, and the middle part of the guide rod 22 moves in the limiting sleeve 28; the opening of the receiving hole 24 is used for the stretching cylinder 20 to move upward when the sealing pneumatic mold base 1 drives the stretching cylinder 20 to move upward, so that the stretching cylinder 20 can move upward and pass through the receiving hole 24 on the fixing seat 16 on the locking pin.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blowing and sealing device, comprising an air sealing dynamic die base (1), the bottom of which is fixedly connected to a blow core die assembly (2), characterized in that: The top of the air-sealing dynamic mold base (1) is provided with a pushing component for moving the position of the air-sealing dynamic mold base (1), the bottom center of the air-sealing dynamic mold base (1) is symmetrically provided with a lower fixing seat (3) for a lock pin, the top of the lower fixing seat (3) for a lock pin is provided with a limiting groove (4), and the two sides of the air-sealing dynamic mold base (1) are symmetrically fixedly connected with positioning seats (7), the positioning seats (7) are inserted and connected inside the limiting groove (4), and a third locking pin opening (8) is provided in the middle of the positioning seat (7), and the inner walls of the front and back sides of the limiting groove (4) are respectively inserted and connected with a second locking pin opening (6) and a first locking pin opening (5), and the second locking pin opening (6), the third locking pin opening (8) and the first locking pin opening (5) are inserted and connected with positioning lock pins (9) for fixing the position of the positioning seat (7) in sequence in a horizontal and longitudinal manner.

2. A blowing and blocking device according to claim 1, characterized in that: A moving part for moving the position of the positioning lock pin (9) is arranged at one end of the positioning lock pin (9), and the moving part comprises a lock pin cylinder (10) symmetrically fixedly connected to the front side of the lock pin lower fixing seat (3), and a lock pin piston rod (11) is arranged at the output end of the lock pin cylinder (10), and one end of the lock pin piston rod (11) is fixedly connected to the back side of the positioning lock pin (9).

3. The air blowing and blocking device according to claim 1, characterized in that: A positioning hole (12) is provided in the middle of the positioning seat (7), the third locking pin opening (8) is inserted and connected inside the positioning hole (12), a limiting groove (13) is provided on one side of the positioning hole (12), the third locking pin opening (8) is configured as a convex ring, one end of the third locking pin opening (8) is inserted and connected inside the limiting groove (13), and an arc groove (14) is provided on the inner wall of one side of the third locking pin opening (8).

4. The air blowing and blocking device according to claim 1, characterized in that: The pushing assembly comprises a pushing member and a fixing member for fixing the position of the pushing member.

5. A blowing and blocking device according to claim 4, characterized in that: The fixing part comprises a Corinthian guide column (15) which is centrally symmetrically inserted and connected to the top of the locking pin lower fixing seat (3); the top of the Corinthian guide column (15) is fixedly connected to the locking pin upper fixing seat (16); the first guide holes (25) are provided at the four corners of the top of the sealing pneumatic mold base (1); the Corinthian guide column (15) is inserted and connected inside the first guide hole (25).

6. A blowing and blocking device according to claim 5, characterized in that: The top end of the locking pin upper fixing seat (16) is symmetrically fixedly connected to a first cylinder (17), the output end of the first cylinder (17) is provided with a first piston rod (18), and the first piston rod (18) is fixedly connected to the top end of the air sealing die seat (1).

7. A blowing and sealing device according to claim 6, characterized in that: First insertion holes (26) are symmetrically formed on both sides of the locking pin upper fixing seat (16), and the first piston rod (18) is slidably inserted and connected inside the first insertion hole (26).

8. The air blowing and sealing device according to claim 6, characterized in that: A stretching assembly (19) is arranged on the top of the core blowing mold assembly (2), a driving member for moving the position of the stretching assembly (19) is arranged on the top of the stretching assembly (19), and a limiting member for limiting the moving direction of the stretching assembly (19) is arranged on the top of the stretching assembly (19).

9. A blowing and blocking device according to claim 8, characterized in that: The driving member comprises a stretching cylinder (20) fixedly connected to the top of the air-sealing dynamic mold base (1); a stretching piston rod (21) is provided at the output end of the stretching cylinder (20); the stretching piston rod (21) is fixedly connected to the top of the stretching component (19); the limiting member comprises a guide rod (22) fixedly connected to the center; a limiting sleeve (28) is centrally symmetrically inserted and connected to the top of the air-sealing dynamic mold base (1); and the guide rod (22) is inserted and connected inside the limiting sleeve (28).

10. The air blowing and blocking device according to claim 9, characterized in that: A second insertion hole (27) is provided in the middle of the sealing pneumatic mold base (1), and the stretching piston rod (21) is inserted and connected inside the second insertion hole (27). A storage hole (24) is provided in the middle of the locking pin upper fixed seat (16), and the stretching cylinder (20) is inserted and connected inside the storage hole (24). Second guide holes (23) are symmetrically provided on both sides of the top of the locking pin upper fixed seat (16), and the guide rod (22) is slidably inserted and connected inside the second guide hole (23).

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