Special equipment for punching flexible circuit board

Abstract

The invention relates to the technical field of flexible circuit board production, in particular to special equipment for punching a flexible circuit board, which comprises an upper die fixing plate, a lower die fixing plate and an upper die fixed on the upper die fixing plate, a lower die and a cushion block are fixed to the upper surface and the lower surface of the lower die fixing plate correspondingly. A plurality of negative pressure generating assemblies are fixed on the lower die fixing plate; air suction holes are formed in the positions, right opposite to the negative pressure generation assemblies, of the lower die. When the punching die is used, the material belt is adsorbed and fixed to the lower die through negative pressure to be positioned and punched, the punching precision is guaranteed, and meanwhile the risk that the material belt is pressed and damaged in the punching process can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible circuit board production, and particularly relates to a special equipment for punching flexible circuit board. BACKGROUND

[0002] At present, with the rapid development of electronic information industry, flexible circuit board (FPC) is widely used in various electronic products such as smart phones, tablet computers, wearable devices and automobile electronics due to its unique advantages of lightness, flexibility, high wiring density and adaptability to complex installation space, and has become one of the indispensable core components of modern electronic equipment. In the production and manufacturing process of flexible circuit board, punching processing is a crucial process. On the one hand, by punching holes of specific specifications and positions on the flexible circuit board, accurate assembly reference can be provided for the subsequent installation and fixation of components, ensuring the accurate position of components on the circuit board and guaranteeing the normal assembly and stable operation of electronic equipment. On the other hand, for the flexible circuit board with multi-layer structure, these punched holes also play a key role in connecting multi-layer wiring, which can realize signal transmission and current conduction between different layers, and is an important structural feature to guarantee the electrical performance of multi-layer flexible circuit board. Therefore, the accuracy of punching directly determines the product quality and use reliability of the flexible circuit board. To achieve high precision punching, accurate positioning of the flexible circuit board before punching operation is a prerequisite. At present, the positioning method for punching flexible circuit board in the industry is relatively common, which is to realize positioning and fixation by cooperation of upper and lower molds. Specifically, the upper mold directly applies pressure to fix the flexible circuit board at the preset position of the lower mold, and then the punching mechanism is started to complete the punching operation. This traditional positioning method has the advantages of simple structure, convenient operation and no need to additionally add complex positioning components, which to some extent reduces the design and manufacturing cost of the mold, and thus has been widely used in the early production of flexible circuit board. However, with the development of electronic equipment towards miniaturization and high precision, the thickness of flexible circuit board becomes thinner and thinner, and the material becomes more fragile. The disadvantages of traditional positioning method are gradually highlighted. Since the upper mold directly applies pressure to the flexible circuit board, and in order to ensure the stability of positioning, a large pressure is usually required to avoid displacement of the circuit board during punching. However, the flexible circuit board itself has poor pressure resistance, and excessive mold pressure can easily cause local indentation, wrinkles, even circuit layer fracture and substrate damage of the circuit board, which seriously affects the product yield and use performance of the flexible circuit board, and cannot meet the current demand for high-precision and high-quality flexible circuit board production. Therefore, a new flexible circuit board punching positioning technology is urgently needed to solve the problem of product damage caused by excessive mold pressure in the existing positioning method. SUMMARY

[0003] The present application aims at the defects and deficiencies of the prior art, and provides a flexible circuit board punching special equipment.

[0004] To achieve the above object, the technical scheme adopted by the present application is: The flexible circuit board punching special equipment comprises an upper die fixing plate, a lower die fixing plate and an upper die fixed on the upper die fixing plate; the upper and lower surfaces of the lower die fixing plate are respectively fixed with a lower die and a cushion block; A plurality of negative pressure generating components are fixed on the lower die fixing plate; and air suction holes are arranged on the lower die in positions opposite to the negative pressure generating components.

[0005] Further, the negative pressure generating component comprises an outer tube fixed on the lower die fixing plate and a lifting shaft slidingly connected inside the outer tube; the diameter of the lifting shaft is equal to the inner hole diameter of the outer tube; A through hole penetrating through the left and right sides of the lifting shaft is arranged on the shaft body of the lifting shaft; a communication hole communicating with the through hole is arranged on the top of the lifting shaft; outer tube through holes are arranged on the two sides of the outer tube; one of the outer tube through holes is connected with a negative pressure module; and the lifting shaft is connected with the upper die fixing plate.

[0006] Further, the two outer tube through holes are coaxially arranged; the through hole is arranged obliquely; and one outer tube through hole connected with the negative pressure module communicates with the bottom end of the through hole.

[0007] Further, one outer tube through hole of the negative pressure module is connected with an exhaust pipe; the negative pressure module is a blowing module; the blowing module is arranged at the end of the exhaust pipe away from the outer tube; and the airflow direction of the blowing module is arranged perpendicularly to the axial direction of the exhaust pipe.

[0008] Further, the blowing module comprises a cylindrical gas distribution member; a plurality of partitions are uniformly arranged in the inner cavity of the gas distribution member; the inner cavity of the gas distribution member is divided into four cavities by the partitions; a connecting port is arranged on each of the cavities; a connecting pipe is connected to each of the connecting ports; a gas nozzle is connected to the end of the connecting pipe; the gas outlet direction of the gas nozzle is arranged perpendicularly to the axial direction of the exhaust pipe; and the gas distribution member is fixed on the cushion block.

[0009] Further, a connecting block is arranged at the end of the exhaust pipe; the gas nozzle is fixed on the connecting block; an air outlet groove is arranged on the connecting block; a neck and a strip-shaped groove are sequentially arranged on the side of the connecting block along the direction of the gas nozzle; the length direction of the air outlet groove is arranged perpendicularly to the axial direction of the exhaust pipe; and the strip-shaped groove communicates with the air outlet groove.

[0010] Further, a connecting bracket is fixed on the lower mold fixed plate; a turnover plate is hinged on the connecting bracket; a driving rod is fixed on the upper mold fixed plate; the driving rod is slidingly connected at one end of the turnover plate; the other end of the turnover plate is slidingly connected with the lifting shaft.

[0011] Further, a first cam groove and a second cam groove are arranged on the turnover plate; a first follower is slidingly connected with the first cam groove on the lifting shaft; a second follower is slidingly connected with the second cam groove on the driving rod. The second cam groove is composed of a first vertical groove, a horizontal groove and a second vertical groove; the two ends of the horizontal groove are respectively connected with one end of the first vertical groove and one end of the second vertical groove.

[0012] Further, the driving rod is detachably connected with the upper mold fixed plate; the connecting bracket is detachably connected with the lower mold fixed plate.

[0013] After the above structure is adopted, the two ends of the material belt are respectively tensioned, and the bottom surface of the material belt is attached to the top surface of the lower mold; after the material belt to be punched is conveyed between the lower mold and the upper mold, each negative pressure generating assembly generates negative pressure in the air suction hole to adsorb and fix the material belt on the surface of the lower mold, and then the external power mechanism drives the upper mold to act downward to punch out the hole position on the material belt, and the waste material falls in the punch blade hole; after the punching is completed, the upper mold rises at the same time, and the negative pressure generating assembly loses the adsorption force; the material belt can continue to advance to the next station. In this structure, the material belt is adsorbed and fixed on the lower mold by negative pressure for positioning and punching, which can reduce the risk of damage of the material belt during punching while ensuring the punching precision. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the first perspective view of the application; Figure 2 is the second perspective view of the application; Figure 3 is a structure diagram of the lower mold part; Figure 4 is a structure diagram of the upper mold part; Figure 5 is a structure diagram of the connection between the negative pressure generating assembly and the air distribution member; Figure 6 is a structure diagram of the negative pressure generating assembly; Figure 7 is a structure diagram of the negative pressure generating assembly after the connecting bracket is detached; Figure 8 is a structure diagram of the negative pressure generating assembly after the connecting bracket and the turnover plate are detached; Figure 9 is an internal structure diagram of the outer tube; Figure 10 This is a structural diagram of the air nozzle; Figure 11 This is a structural diagram of the air distribution unit; Explanation of reference numerals in the attached figures: 1. Upper mold fixing plate; 2. Drive rod; 201. Second follower wheel; 3. Negative pressure generating component; 301, outer pipe; 30101, outer pipe through hole; 302, exhaust pipe; 30201, connecting block; 30202, Air outlet groove; 303, Lifting shaft; 30301, Through hole; 30302, Connecting hole; 304. First follower wheel; 305. Tilting plate; 30501. First cam groove; 30502, Second cam groove; 3050201, First vertical groove; 3050202, Horizontal groove; 3050203, Second vertical groove; 306, Connecting bracket; 307, Air nozzle; 30701, Narrowing opening; 30702, strip groove; 4, pad block; 5, lower die fixing plate; 6, lower die; 601, punch hole; 602. Suction hole; 7. Upper mold; 8. Connecting pipe; 9. Air distribution component; 901. Partition plate; 902. Connection port. Detailed Implementation

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] like Figures 1 to 11 As shown, the flexible circuit board punching equipment of the present invention includes an upper die fixing plate 1, a lower die fixing plate 5, and an upper die 7 fixed on the upper die fixing plate 1; a lower die 6 and a pad block 4 are respectively fixed on the upper and lower surfaces of the lower die fixing plate 5. Multiple negative pressure generating components 3 are fixed on the lower mold fixing plate 5; each of the lower mold 6 has an air suction hole 602 at a position directly opposite the negative pressure generating components 3. The lower die 6 is provided with a punching hole 601; the upper die 7 is provided with a cutting tool at the position that matches the punching hole 601. The pad block 4 is fixed to the punch press; the upper die fixing plate 1 is fixed to the lifting system of the punch press; Both ends of the strip are tensioned, and the bottom surface of the strip is attached to the top surface of the lower die 6; After the material belt to be punched is conveyed between the lower die 6 and the upper die 7, each negative pressure generating assembly 3 causes the suction hole 602 to generate negative pressure, thereby adsorbing and fixing the material belt on the surface of the lower die 6, and then an external power mechanism drives the upper die 7 to move downward, thereby punching a hole on the material belt, and the waste material is discharged through the punch blade hole 601; after the punching is completed, the upper die 7 is lifted, and the negative pressure generating assembly 3 loses the adsorption force; the material belt can continue to advance to the next station.

[0017] In this structure, the material belt is adsorbed and fixed on the lower die 6 by negative pressure for positioning and punching, which can reduce the risk of damage to the material belt during punching while ensuring the punching precision.

[0018] As a preferred mode of the application, the negative pressure generating assembly 3 comprises an outer tube 301 fixed on the lower die fixed plate 5 and a lifting shaft 303 slidingly connected inside the outer tube 301; the diameter of the lifting shaft 303 is equal to the inner hole diameter of the outer tube 301. The lifting shaft 303 is provided with a through hole 30301 penetrating through the left and right sides of the lifting shaft 303; the top of the lifting shaft 303 is provided with a communication hole 30302 communicating with the through hole 30301; the outer tube 301 is provided with outer tube through holes 30101 on both sides; one of the outer tube through holes 30101 is connected with a negative pressure module; the lifting shaft 303 is connected to the upper die fixed plate 1; The lower die fixed plate 5 is provided with a circular hole at the position connected with the outer tube 301, which communicates the outer tube 301 with the suction hole 602; The lifting movement of the upper die fixed plate 1 can drive the lifting shaft 303 to move up and down; before the upper die 7 contacts with the material belt, one of the outer tube through holes 30101 not connected with the negative pressure module is connected with the through hole 30301; one of the outer tube through holes 30101 connected with the negative pressure module is disconnected with the through hole 30301, so that the outer tube through hole 30101, the communication hole 30302, the circular hole of the lower die fixed plate 5 and the suction hole 602 of the lower die 6 are all connected with the atmosphere, and the suction hole 602 has no adsorption force on the material belt; in this state, the material belt is fed.

[0019] When the lower die 6 begins to approach the material strip, the lifting shaft 303 is in motion, and one outer pipe through hole 30101 connected with the negative pressure module is disconnected from the through hole 30301, and one outer pipe through hole 30101 connected with the negative pressure module is connected with the through hole 30301; the through hole 30301, the communication hole 30302, the inner cavity of the outer pipe through hole 30101, the circular hole of the die fixing plate 5, and the air suction hole 602 of the lower die 6 form a negative pressure through the negative pressure module. The air suction hole 602 adsorbs and fixes the material strip before the upper die 7 contacts the material strip; during the punching of the material strip by the upper die 7, the air suction hole 602 also continuously adsorbs and fixes the material strip. When the upper die 7 completes the punching and retreats to be misaligned with the material strip, one outer pipe through hole 30101 connected with the negative pressure module is disconnected from the through hole 30301, and one outer pipe through hole 30101 not connected with the negative pressure module is connected with the through hole 30301, the communication hole 30302 is connected with the atmosphere, and the material strip is not adsorbed; the lifting shaft 303 is formed by injection molding; In this structure, the movement of the upper die 7 realizes the alternating connection or closing of the two outer pipe through holes 30101 inherent logic, without the need for additional electrical equipment to control the negative pressure equipment rhythm, simplifying the circuit structure.

[0020] As a preferred way of the invention, the two outer pipe through holes 30101 are coaxially arranged; the through hole 30301 is arranged obliquely; one outer pipe through hole 30101 connected with the negative pressure module is connected with the bottom end of the through hole 30301; the outer pipe through hole 30101 is coaxially arranged, which is easy to process and control the precision of the processing of the position of the two outer pipe through holes 30101; and the angle between one outer pipe through hole 30101 connected with the negative pressure module and the outer pipe through hole 30101 is obtuse, which can make the air flow resistance of the negative pressure module and the communication hole 30302 smaller, and the gas flow more smooth, ensuring the stability of comfortable output.

[0021] As a preferred way of the invention, one outer pipe through hole 30101 of the negative pressure module is connected with an exhaust pipe 302; the negative pressure module is a blowing module; the blowing module is arranged at the end of the exhaust pipe 302 away from the outer pipe 301; the air flow direction generated by the blowing module is perpendicular to the axial direction of the exhaust pipe 302; The blowing module can continuously generate air flow on the port of the exhaust pipe 302, and the air flow in the axial direction of the exhaust pipe 302 generates negative pressure in the exhaust pipe 302, so that the air suction hole 602 adsorbs the material strip.

[0022] As a preferred mode of the invention, the blowing module comprises a cylindrical gas distribution member 9; the inner cavity of the gas distribution member 9 is uniformly provided with a plurality of partitions 901; the partitions 901 divide the inner cavity of the gas distribution member 9 into four cavities; the cavities are each provided with a connecting port 902; the connecting port 902 is connected with a connecting pipe 8; the end of the connecting pipe 8 is connected with a gas nozzle 307; the gas outlet direction of the gas nozzle 307 is perpendicular to the axial direction of the exhaust pipe 302; the gas distribution member 9 is fixed on the cushion block 4. The gas distribution member 9 has an open bottom structure and is connected with a gas supply device; the gas supply device supplies gas from the bottom of the gas distribution member 9, and then the gas is evenly distributed in the four cavities; the positive pressure in the cavities is discharged from the exhaust pipe 302 through the connecting pipe 8.

[0023] As a preferred mode of the invention, the end of the exhaust pipe 302 is provided with a connecting block 30201; the gas nozzle 307 is fixed on the connecting block 30201; the connecting block 30201 is provided with an air outlet groove 30202; the gas nozzle 307 is sequentially provided with a necked portion 30701 and a strip-shaped groove 30702 along the side of the connecting block 30201; the length direction of the air outlet groove 30202 is perpendicular to the axial direction of the exhaust pipe 302; the strip-shaped groove 30702 is connected with the air outlet groove 30202; The air outlet groove 30202 and the strip-shaped groove 30702 converge to form a narrow air flow at the position of the air outlet groove 30202, increase the flow rate of the air outlet groove 30202, ensure the vacuum degree, and enable the gas to more effectively act on the port of the exhaust pipe 302, thereby improving the effective utilization rate of the gas.

[0024] As a preferred mode of the invention, the lower mold fixed plate 5 is fixed with a connecting bracket 306; the connecting bracket 306 is hingedly connected with a turnover plate 305; the upper mold fixed plate 1 is fixed with a driving rod 2; the driving rod 2 is slidingly connected to one end of the turnover plate 305; the other end of the turnover plate 305 is slidingly connected with the lifting shaft 303; The driving rod 2 synchronously moves up and down with the upper mold fixed plate 1 and the upper mold 7; when the driving rod 2 moves up and down, the turnover plate 305 rotates around the connecting bracket 306 to realize the lifting movement of the lifting shaft 303.

[0025] As a preferred mode of the invention, the turnover plate 305 is provided with a first cam groove 30501 and a second cam groove 30502; the lifting shaft 303 is provided with a first follower 304 which is slidingly connected with the first cam groove 30501; the driving rod 2 is provided with a second follower 201 which is slidingly connected with the second cam groove 30502; The second cam groove 30502 is composed of a first vertical groove 3050201, a horizontal groove 3050202 and a second vertical groove 3050203; two ends of the horizontal groove 3050202 are respectively connected with one end of the first vertical groove 3050201 and one end of the second vertical groove 3050203; When the driving rod 2 is lifted, the second follower 201 slides in the second cam groove 30502 to push the turnover plate 305 to turn over, so that the first follower 304 pushes the lifting shaft 303 to make lifting movement; When the second follower 201 moves in the first vertical groove 3050201, the punching blade of the upper die 7 is above the material belt, in this state, the upper die 7 moves, the turnover plate 305 does not turn, and the outer tube through hole 30101 of the negative pressure module and the through hole 30301 are not always in communication, so the material belt cannot be adsorbed to ensure the unobstructed conveying of the material belt.

[0026] When the second follower 201 moves in the horizontal groove 3050202, the turnover plate 305 is turned, and the lifting shaft 303 starts to move, When the punching blade of the upper die 7 gradually approaches the material belt, the second follower 201 starts to slide in the horizontal groove 3050202, the outer tube through hole 30101 of the negative pressure module and the through hole 30301 are not dislocated, and the outer tube through hole 30101 of the negative pressure module and the through hole 30301 gradually approach each other; when the distance between the bottom end of the punching blade of the upper die 7 and the material belt is five millimeters, the second follower 201 moves to one end of the horizontal groove 3050202 close to the second vertical groove 3050203, and the outer tube through hole 30101 of the negative pressure module and the through hole 30301 are opposite to each other; When the second follower 201 enters the second vertical groove 3050203, the punching blade of the upper die 7 starts to punch the material belt, and the second follower 201 does not turn the turnover plate 305 during the sliding process in the second vertical groove 3050203, so that the outer tube through hole 30101 of the negative pressure module and the through hole 30301 are always in the opposite state during the cutting process; in actual design, the horizontal groove 3050202 and the second vertical groove 3050203 are not perpendicular to each other.

[0027] The structure of the first cam groove 30501 and the second cam groove 30502 arranged on the turnover plate 305 is used to drive the lifting shaft 303, and the outer tube through hole 30101 and the through hole 30301 are always opposite to each other during the punching process, and the total length of the outer tube 301 is as short as possible, which shortens the height of the whole negative pressure generating assembly 3, so that the overall thickness of the mold can be thinner.

[0028] As a preferred mode of the application, the driving rod 2 is detachably connected to the upper die fixed plate 1; the connecting bracket 306 is detachably connected to the lower die fixed plate 5. Threaded holes are arranged on the side surfaces of the upper die fixed plate 1 and the lower die fixed plate 5; the driving rod 2 is fixed on the upper die fixed plate 1 by screwing bolts through the through holes on the driving rod 2 and connecting with the upper die fixed plate 1, and the connecting bracket 306 is fixed on the lower die fixed plate 5 by screwing bolts through the through holes of the connecting bracket 306 and connecting with the threaded holes of the lower die fixed plate 5; the top end of the outer tube 301 is provided with external threads, and the bottom surface of the lower die fixed plate 5 is provided with threaded holes; the external threads are connected with the threaded holes to fix the outer tube 301 on the lower die fixed plate 5, which facilitates the disassembly, assembly and maintenance of the entire negative pressure generating assembly 3.

[0029] The beneficial effects of the application are as follows: 1. The material belt is positioned and fixed on the lower die by negative pressure for punching, which can reduce the risk of damage caused by pressure during punching of the material belt while ensuring punching precision.

[0030] 2. The inherent logic of the two outer tube through holes is alternately connected or closed by the movement of the upper die, without the need for additional electrical equipment to control the beat of the negative pressure equipment, which simplifies the circuit structure and reduces the probability of failure of the negative pressure equipment.

[0031] 3. The angle between one outer tube through hole of the negative pressure module and the outer tube through hole is obtuse, which can make the air flow resistance of the negative pressure module and the communication hole smaller, the gas flow more smooth, and the stability of comfortable output guaranteed.

[0032] 4. A narrow air flow is formed at the outlet groove position by the confluence of the outlet groove and the strip-shaped groove, which increases the flow rate of the outlet groove, guarantees the vacuum degree, and enables the gas to act more effectively on the port of the exhaust pipe, thereby improving the effective utilization rate of the gas.

[0033] The above description is only the preferred embodiment of the application, and any equivalent changes or modifications made to the structure, features and principles described in the scope of the application are included in the scope of the application.

Claims

1. A flexible circuit board punching special equipment, comprising an upper die fixed plate (1), a lower die fixed plate (5) and an upper die (7) fixed on the upper die fixed plate (1); the upper and lower surfaces of the lower die fixed plate (5) are respectively fixed with a lower die (6) and a cushion block (4); characterized in that A plurality of negative pressure generating components (3) are fixed on the lower die fixed plate (5); the lower die (6) is provided with an air suction hole (602) at a position opposite to the negative pressure generating component (3).

2. The apparatus according to claim 1, wherein: The negative pressure generating component (3) comprises an outer tube (301) fixed on the lower die fixed plate (5) and a lifting shaft (303) slidably connected in the outer tube (301); the diameter of the lifting shaft (303) is equal to the inner hole diameter of the outer tube (301); The lifting shaft (303) is provided with a through hole (30301) penetrating through the left and right sides of the lifting shaft (303); the top of the lifting shaft (303) is provided with a communication hole (30302) communicating with the through hole (30301); the outer tube (301) is provided with outer tube through holes (30101) on both sides; one of the outer tube through holes (30101) is connected with a negative pressure module; the lifting shaft (303) is connected to the upper die fixed plate (1).

3. The apparatus of claim 2, wherein: The two outer tube through holes (30101) are coaxially arranged; the through hole (30301) is inclinedly arranged; one outer tube through hole (30101) connected with the negative pressure module communicates with the bottom end of the through hole (30301).

4. The apparatus of claim 2, wherein: One outer tube through hole (30101) of the negative pressure module is connected with an exhaust pipe (302); the negative pressure module is a blowing module; the blowing module is arranged at the end of the exhaust pipe (302) away from the outer tube (301); the airflow direction generated by the blowing module is perpendicular to the axial direction of the exhaust pipe (302).

5. The apparatus of claim 4, wherein: The blowing module comprises a cylindrical gas distribution member (9); the inner cavity of the gas distribution member (9) is uniformly provided with a plurality of partitions (901); the partitions (901) divide the inner cavity of the gas distribution member (9) into four cavities; the cavities are all provided with connecting ports (902); the connecting ports (902) are all connected with connecting pipes (8); the connecting pipes (8) are connected with air nozzles (307) at the ends; the air outlet direction of the air nozzles (307) is perpendicular to the axial direction of the exhaust pipe (302); the gas distribution member (9) is fixed on the cushion block (4).

6. The apparatus of claim 5, wherein: The end of the exhaust pipe (302) is provided with a connecting block (30201); the air nozzle (307) is fixed on the connecting block (30201); the connecting block (30201) is provided with an air outlet groove (30202); the air nozzle (307) is sequentially provided with a neck (30701) and a strip-shaped groove (30702) along the side direction of the connecting block (30201); the length direction of the air outlet groove (30202) is perpendicular to the axial direction of the exhaust pipe (302); the strip-shaped groove (30702) communicates with the air outlet groove (30202).

7. The apparatus of claim 2 wherein: the cutting device comprises a cutting wheel having a plurality of cutting teeth; and the cutting wheel is mounted on a shaft that is rotatably mounted on the frame. The lower mold fixed plate (5) is fixed with a connecting support (306); the connecting support (306) is hinged with a turnover plate (305); the upper mold fixed plate (1) is fixed with a driving rod (2); the driving rod (2) is slidingly connected at one end of the turnover plate (305); the other end of the turnover plate (305) is slidingly connected with the lifting shaft (303).

8. The apparatus of claim 7, wherein: The turnover plate (305) is provided with a first cam groove (30501) and a second cam groove (30502); the lifting shaft (303) is provided with a first follower (304) slidingly connected with the first cam groove (30501); the driving rod (2) is provided with a second follower (201) slidingly connected with the second cam groove (30502); The second cam groove (30502) is composed of a first vertical groove (3050201), a horizontal groove (3050202) and a second vertical groove (3050203); the two ends of the horizontal groove (3050202) are respectively connected with one end of the first vertical groove (3050201) and one end of the second vertical groove (3050203).

9. The apparatus of claim 7, wherein: The driving rod (2) is detachably connected with the upper mold fixed plate (1); the connecting support (306) is detachably connected with the lower mold fixed plate (5).

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