Perforating machine for flexible printed circuit board production

Abstract

The invention is applied to the field of circuit board production, and particularly discloses a punching machine for flexible printed circuit board production, which comprises a base, the base is of a hollow cuboid structure, a bearing table is arranged above the base, the bearing table is of a two-section structure, the main body part of the bearing table is of a hollow circular ring structure, and the main body part of the bearing table is of a hollow circular ring structure. The inner surface of the circular-ring-shaped bearing table body is fixedly connected with a cylinder structure with an opening in the upper surface, cylindrical through holes are formed in the upper surface and the lower surface of the base, the circular-ring-shaped bearing table is arranged to bear circuit boards, the circular-ring-shaped bearing table can contain a plurality of circuit boards at the same time, and correspondingly, the circuit boards can be placed in the cylindrical through holes. A top plate with the same size is arranged above the bearing table in an overhead mode, a laser head is arranged on the lower surface of the top plate, ultraviolet laser emitted by the laser head is used for punching a circuit board, the laser head can annularly rotate on the lower surface of the top plate, the rotating laser head is matched with the annular bearing table, and the sequential punching process of a plurality of circuit boards can be conducted through one-time feeding.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board production, in particular to a punching machine for producing flexible printed circuit boards. Background Art

[0002] A flexible printed circuit board is a printed circuit board made of a flexible insulating substrate, which is usually made of polyimide or polyester film. Compared with traditional printed circuit boards, flexible printed circuit boards have the characteristics of being bendable, foldable, and curlable, which enables them to adapt to the internal structure and space requirements of various complex electronic products. They are widely used in mobile phones, laptops, PDAs, digital cameras and many other products.

[0003] In the production process of flexible printed circuit boards, punching is a very important link. Punching holes in flexible printed circuit boards can achieve circuit connection and component installation needs. At present, in the process of punching holes in flexible printed circuit boards, mechanical claws are usually used to clamp and fix the circuit boards. However, the mechanical claws are prone to leave indentations on the edges of the flexible circuit boards, affecting the quality of the circuit boards. In addition, for flexible circuit boards with irregular shapes or small sizes, the claws may not be able to adapt well, resulting in unstable clamping and affecting the punching effect. Summary of the invention

[0004] The object of the present invention is to provide a punching machine for producing flexible printed circuit boards, so as to solve the problem that the mechanical claws proposed in the above background technology are prone to leave indentations on the flexible printed circuit boards during the process of clamping the flexible printed circuit boards.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a punching machine for producing flexible printed circuit boards, comprising a base, the base being a hollow rectangular parallelepiped structure, a supporting platform being arranged above the base, the supporting platform being a two-section structure, the main body of the supporting platform being a hollow annular structure, the inner surface of the annular supporting platform main body being fixedly connected with a cylindrical structure with an open upper surface, the upper and lower surfaces of the base being provided with cylindrical through holes, the cylindrical section of the supporting platform being slidably inserted into the through holes on the surface of the base, a top plate being arranged above the supporting platform, the top plate being a cylindrical structure of the same size as the supporting platform, a laser head being arranged on the lower surface of the top plate, the laser head being an ultraviolet laser structure, the surface of the top plate being provided with an annular track structure, the annular track structure realizing a sequential processing process of multiple circuit boards on the surface of the supporting platform through an annular displacement of the laser head; Preferably, the annular track structure includes a sliding plate, which is rotatably mounted in an annular track provided on the lower surface of the top plate, an L-shaped support rod is provided on the outer surface of the top plate to fixedly connect the top plate with the upper surface of the base, a guide rail is provided on the lower surface of the sliding plate, and two groups of guide rails are provided, one of which is fixedly mounted on the lower surface of the sliding plate, and another guide rail is slidably mounted on the surface of the guide rail, and a laser head is slidably connected to the surface of the guide rail, and a driving mechanism is provided inside the sliding plate to realize the movement of the laser head.

[0006] By adopting the above technical solution, the circular track structure can be used to realize the movement of the laser head, so as to facilitate the sequential processing of multiple circuit boards.

[0007] Preferably, a lifting structure is provided on the surface of the supporting platform, and the lifting structure realizes stable proximity between the flexible printed circuit board and the laser head by changing the height of the supporting platform.

[0008] By adopting the above technical solution, the height of the supporting platform can be changed by utilizing the lifting structure, thereby achieving the process of bringing the circuit board and the laser head closer together.

[0009] Preferably, the lifting structure includes a guide column, which is a cylindrical structure and is fixedly mounted on a circular portion of the lower surface of the top plate. The other end of the guide column is inserted into an open cylindrical section of a supporting platform. A long groove is provided on the surface of the guide column. A guide block is slidably connected in the groove on the surface of the guide column. The cross-section of the guide block is an H-shaped structure, and the surface of the guide block is fixedly connected to the inner wall of the cylindrical section of the supporting platform. The lower surface of the supporting platform is fixedly mounted on the output end of the electric push rod, and the electric push rod is fixedly mounted on the lower surface of the base.

[0010] By adopting the above technical solution, the circuit board can be lifted by sliding the supporting platform on the surface of the guide column.

[0011] Preferably, a supporting groove is provided on the surface of the supporting platform, a grille-shaped ventilation hole is provided on the inner wall of the supporting groove, and an adsorption fixing structure is provided inside the supporting platform, which realizes damage-free fixation of the circuit board through the pressure difference between atmospheric pressure and the inside of the supporting platform.

[0012] By adopting the above technical solution, the adsorption and fixing process of the circuit board can be realized from the bottom of the circuit board using the adsorption and fixing structure.

[0013] Preferably, the adsorption and fixing structure includes an air guide hood, which is a square bucket structure. The upper surface of the air guide hood is fixedly connected to the upper surface of the inner wall of the supporting platform, and the upper surface of the air guide hood completely wraps the air vents on the surface of the supporting groove. A connecting pipe is provided through the lower end of the air guide hood, and the other end of the connecting pipe is connected to the vacuum pump through a telescopic hose. The vacuum pump is fixedly installed on the upper surface of the support plate, and the support plate is fixedly connected to the surface of the supporting legs on the lower surface of the base. A plurality of supporting grooves are annularly arranged on the surface of the supporting platform, and the surface of each of the supporting grooves is respectively provided with an adsorption and fixing structure.

[0014] By adopting the above technical solution, a negative pressure area can be formed on the surface of the supporting groove by using the air guide cover, thereby realizing the fixing process of the circuit board.

[0015] Preferably, a reinforcement structure is provided on the upper surface of the supporting groove, and the reinforcement structure further clamps the circuit board from above the flexible printed circuit board by adsorbing the pressure difference generated by the fixing structure.

[0016] By adopting the above technical solution, the circuit board can be further fixed from above the circuit board using the reinforcement structure.

[0017] Preferably, the reinforcement structure includes a guide cylinder, which is a hollow cylinder structure with an open upper surface, the guide cylinder is embedded and fixed on the upper surface of the support platform, the lower surface of the guide cylinder is connected to the connecting pipe through a pipeline, a No. 1 slider is slidably installed on the inner wall of the guide cylinder, a limiting protrusion is arranged above the inner wall of the guide cylinder to limit the No. 1 slider, the No. 1 slider is a magnetic block structure, the outer surface of the guide cylinder is slidably connected with a No. 2 slider, the No. 2 slider is a circular ring structure, and the No. 2 slider is a magnetic block structure, the No. 1 slider and the No. 2 slider are adsorbed on each other, the surface of the No. 2 slider is fixedly connected to a pressure plate through a connecting rod, and the two ends of the pressure plate are respectively slidably connected to the inner wall of the supporting groove.

[0018] By adopting the above technical solution, the sliding of the No. 1 slider in the guide cylinder can drive the No. 2 slider, thereby realizing the movement process of the pressure plate.

[0019] Compared with the prior art, the invention has the following beneficial effects: the punching machine for producing flexible printed circuit boards: 1. In the present invention, a circular support platform is provided to support the circuit board. The circular support platform can accommodate multiple circuit boards at the same time. Correspondingly, a top plate of equal size is provided above the support platform. A laser head is provided on the lower surface of the top plate. The circuit board is punched with ultraviolet laser emitted by the laser head. The laser head can rotate in a circular manner on the lower surface of the top plate. The rotating laser head cooperates with the circular support platform, and multiple circuit boards can be punched in sequence at a single loading. Furthermore, the top plate is fixed in position, and the supporting platform is moved up and down by an electric push rod. The lifted supporting platform drives the circuit board and the laser head to approach each other for drilling. A guide rod is arranged on the lower surface of the top plate, and the guide block on the surface of the supporting platform is slidably connected with the guide rod to ensure that the lifting process of the supporting platform is always kept in the vertical direction, and the circuit board on the surface of the supporting platform will not be horizontally offset during the lifting process, so as to ensure that the laser head drilling process is always carried out according to the set route; 2. In the present invention, a supporting groove is arranged on the surface of the supporting platform, and ventilation holes are arranged on the surface of the supporting groove. At the same time, an air guide cover connected to a vacuum pump is arranged inside the supporting platform. The vacuum pump is used to extract air from the air guide cover, so that the air pressure in the air guide cover is lower than the atmospheric pressure. The circuit board is firmly adsorbed on the surface of the supporting groove from below through the ventilation holes on the surface of the supporting groove, thereby avoiding the deviation of the punching holes and reducing the wear on the surface of the circuit board; Furthermore, a guide tube is arranged through the surface of the support platform, and a connecting pipe at the air guide cover of the guide tube is connected. When the vacuum pump is started for adsorption and fixation, the No. 1 slider in the guide tube moves synchronously under the push of air pressure, and the magnetic force is used to drive the No. 2 slider. The No. 2 slider drives the pressure plate to press and fix the circuit board from above, thereby further avoiding the deviation of the punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the support plate and vacuum pump structure of the present invention; Figure 3 This is a schematic diagram of the front cross-section structure of the base of the present invention; Figure 4 It is a schematic diagram of the front cross-section structure of the top plate of the present invention; Figure 5 It is a schematic diagram of the supporting platform and top plate structure of the present invention; Figure 6 This is a schematic diagram of the top plate structure of the present invention when viewed from above; Figure 7 It is a schematic diagram of the top view of the supporting platform of the present invention; Figure 8 It is a schematic diagram of the front section structure of the support platform of the present invention; Fig. 9 It is a schematic diagram of the front section structure of the guide tube of the present invention; Fig.10 It is a schematic diagram of the structure of the guide column and the guide block of the present invention.

[0021] In the figure: 1. base; 2. supporting platform; 3. top plate; 4. sliding plate; 5. guide rail; 6. laser head; 7. guide column; 8. guide block; 9. electric push rod; 10. support plate; 11. supporting groove; 12. air guide cover; 13. connecting pipe; 14. vacuum pump; 15. guide cylinder; 16. slider No. 1; 17. slider No. 2; 18. pressure plate. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-Figure 10 The present invention provides a technical solution: a punching machine for producing flexible printed circuit boards, comprising a base 1, a supporting platform 2, a top plate 3, a sliding plate 4, a guide rail 5, a laser head 6, a guide column 7, a guide block 8, an electric push rod 9, a support plate 10, a supporting groove 11, an air guide cover 12, a connecting pipe 13, a vacuum pump 14, a guide cylinder 15, a first slider 16, a second slider 17, and a pressing plate 18.

[0024] The base 1 is a hollow rectangular parallelepiped structure, a support platform 2 is arranged above the base 1, the support platform 2 is a two-section structure, the main part of the support platform 2 is a hollow circular ring structure, the inner surface of the circular ring support platform 2 main body is fixedly connected with a cylindrical structure with an open upper surface, the upper and lower surfaces of the base 1 are provided with cylindrical through holes, the cylindrical section of the support platform 2 is slidably inserted into the through holes on the surface of the base 1, a top plate 3 is arranged above the support platform 2, the top plate 3 is a cylindrical structure of the same size as the support platform 2, a laser head 6 is arranged on the lower surface of the top plate 3, the laser head 6 is a UV laser structure, and the surface of the top plate 3 is provided with an annular track structure. The sequential processing process of multiple circuit boards on the surface of the support platform 2 is realized by the circular displacement of the laser head 6. The circular track structure includes a sliding plate 4, which is rotatably installed in a circular track set on the lower surface of the top plate 3. The outer surface of the top plate 3 is provided with an L-shaped support rod to fix the top plate 3 with the upper surface of the base 1. The lower surface of the sliding plate 4 is provided with a guide rail 5. The guide rail 5 is provided with 2 groups, one of which is fixedly installed on the lower surface of the sliding plate 4. Another guide rail 5 is slidably installed on the surface of the guide rail 5, and the surface of the guide rail 5 is slidably connected with the laser head 6. The interior of the sliding plate 4 is provided with a driving mechanism to realize the movement of the laser head 6. like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, in the process of using the present device to punch holes in a circuit board, the circuit board to be punched is placed on the surface of the supporting platform 2 and fixed in the supporting groove 11, and then the lifting structure is started to lift the supporting platform 2 and bring it close to the laser head 6, and then the laser head 6 is started. The driving mechanism provided inside the sliding plate 4 is used to drive the laser head 6 to move on the guide rail 5 on the lower surface of the sliding plate 4, thereby realizing the process of punching holes in the circuit board by the laser head 6. When it is necessary to punch holes in another circuit board, the laser head 6 is turned off, and the driving mechanism is used to drive the sliding plate 4 to move in the annular track on the lower surface of the top plate 3 until the laser head 6 is aligned with the other circuit board, and then the laser head 6 is started again to punch holes in the circuit board.

[0025] A lifting structure is provided on the surface of the supporting platform 2, and the lifting structure realizes the stable approach of the flexible printed circuit board and the laser head 6 by the height change of the supporting platform 2. The lifting structure includes a guide column 7, which is a cylindrical structure, and the guide column 7 is fixedly installed at the circular part of the lower surface of the top plate 3, and the other end of the guide column 7 is inserted into the open cylindrical section of the supporting platform 2. A long strip groove is provided on the surface of the guide column 7, and a guide block 8 is slidably connected in the groove on the surface of the guide column 7. The cross section of the guide block 8 is an H-shaped structure, and the surface of the guide block 8 is fixedly connected to the inner wall of the cylindrical section of the supporting platform 2. The lower surface of the supporting platform 2 is fixedly installed on the output end of the electric push rod 9, and the electric push rod 9 is fixedly installed on the lower surface of the base 1; like Figure 2 , Figure 3 , Figure 4 and Fig.10 As shown, when the supporting platform 2 is lifted, the electric push rod 9 is started, and the electric push rod 9 drives the supporting platform 2 to rise on the surface of the base 1. When the supporting platform 2 is raised, the H-shaped guide block 8 on the inner wall of the supporting platform 2 slides upward in the long strip groove on the surface of the guide column 7. The relative movement of the guide block 8 and the guide column 7 can ensure that the supporting platform 2 always remains vertical during the rising process, avoiding the circuit board on the surface of the supporting platform 2 from shifting, thereby ensuring the accuracy of the punching.

[0026] A supporting groove 11 is provided on the surface of the supporting platform 2, and a grille-shaped ventilation hole is provided on the inner wall of the supporting groove 11. An adsorption fixing structure is provided inside the supporting platform 2. The adsorption fixing structure realizes non-destructive fixation of the circuit board through the pressure difference between the atmospheric pressure and the pressure inside the supporting platform 2. The adsorption fixing structure includes an air guide cover 12. The air guide cover 12 is a square bucket structure. The upper surface of the air guide cover 12 is fixedly connected to the upper surface of the inner wall of the supporting platform 2. The upper surface of the air guide cover 12 completely wraps the ventilation hole on the surface of the supporting groove 11. A connecting pipe 13 is provided through the lower end of the air guide cover 12. The other end of the connecting pipe 13 is connected to a vacuum pump 14 through a telescopic hose. The vacuum pump 14 is fixedly installed on the upper surface of the supporting plate 10. The supporting plate 10 is fixedly connected to the surface of the supporting leg on the lower surface of the base 1. A plurality of supporting grooves 11 are provided in an annular manner on the surface of the supporting platform 2, and the surface of each supporting groove 11 is provided with an adsorption fixing structure respectively. like Figure 3 , Figure 5 , Figure 7 , Figure 8 As shown, when the circuit board is placed on the surface of the supporting groove 11 on the surface of the supporting platform 2, the lower surface of the circuit board contacts the grille-shaped ventilation holes on the surface of the supporting groove 11, and the vacuum pump 14 is started. The vacuum pump 14 uses the connecting pipe 13 to extract air from the air guide cover 12, thereby reducing the air pressure in the air guide cover 12 to be lower than the external atmospheric pressure, forming a negative pressure area under the circuit board, and the atmospheric pressure presses the circuit board downward and fixes it above the circuit board, thereby fixing the circuit board on the surface of the supporting groove 11 to avoid displacement during the punching process. In the process of adsorption and fixation using air pressure, damage to the surface of the circuit board can also be avoided to the greatest extent.

[0027] A reinforcement structure is provided on the upper surface of the supporting groove 11. The reinforcement structure further clamps the circuit board from above the flexible printed circuit board by the pressure difference generated by the adsorption fixing structure. The reinforcement structure includes a guide cylinder 15. The guide cylinder 15 is a hollow cylindrical structure with an open upper surface. The guide cylinder 15 is embedded and fixed on the upper surface of the supporting platform 2. The lower surface of the guide cylinder 15 is connected with the connecting pipe 13 through a pipeline. A slider 16 is slidably installed on the inner wall of the guide cylinder 15. A limiting protrusion is provided above the inner wall of the guide cylinder 15 to limit the slider 16. The slider 16 is a magnetic block structure. The outer surface of the guide cylinder 15 is slidably connected with a slider 17. The slider 17 is a circular ring structure, and the slider 17 is a magnetic block structure. The slider 16 and the slider 17 are adsorbed on each other. The surface of the slider 17 is fixedly connected with a pressing plate 18 through a connecting rod. The two ends of the pressing plate 18 are respectively slidably connected with the inner wall of the supporting groove 11. like Figure 3 , Figure 5 , Figure 7 , Fig. 9As shown, when the vacuum pump 14 is evacuating air to the connecting tube 13, the air in the guide cylinder 15 that passes through the connecting tube 13 is also evacuated through the connecting tube 13, and the air pressure in the guide cylinder 15 is reduced. The atmospheric pressure pushes the No. 1 slider 16 in the guide cylinder 15 to slide downward, and the sliding No. 1 slider 16 drives the outer No. 2 slider 17 to slide downward, and the No. 2 slider 17 drives the pressure plate 18 to slide downward on the inner wall of the supporting groove 11 to fix the circuit board from above the circuit board, thereby further preventing the circuit board from displacement.

[0028] Working principle: Place the circuit board to be punched in the support groove 11 on the surface of the support table 2, start the vacuum pump 14, and the vacuum pump 14 extracts air from the air guide cover 12 through the connecting pipe 13, so that negative pressure is formed in the air guide cover 12. Under the action of the internal and external pressure difference, the circuit board is tightly adsorbed in the grille ventilation hole on the surface of the support groove 11. At the same time, the air pressure in the guide cylinder 15 connected with the connecting pipe 13 is reduced, and the No. 1 slider 16 slides downward in the guide cylinder 15, and the No. 1 slider 16 drives the outer No. 2 slider 17 to slide downward, and the No. 2 slider 17 drives the pressure plate 18 downward. The circuit board is fixed by sliding from above to ensure that the circuit board will not deviate during the punching process, the electric push rod 9 is started, and the electric push rod 9 drives the supporting platform 2 to rise, and the guide block 8 on the inner wall of the supporting platform 2 slides upward in the surface groove of the guide column 7 to ensure that the supporting platform 2 always remains vertical during the rising process, and the laser head 6 is started. The laser head 6 punches the circuit board, and the driving mechanism drives the sliding plate 4 to move in the annular track on the lower surface of the top plate 3, thereby realizing the process of punching holes in the circuit boards in the multiple supporting grooves 11 on the surface of the supporting platform 2 in sequence.

[0029] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A punching machine for producing flexible printed circuit boards, comprising a base (1), wherein the base (1) is a hollow rectangular parallelepiped structure, a support platform (2) is arranged above the base (1), the support platform (2) is a two-section structure, the main body of the support platform (2) is a hollow annular structure, the inner surface of the annular support platform (2) main body is fixedly connected to a cylindrical structure with an open upper surface, the upper and lower surfaces of the base (1) are provided with cylindrical through holes, the cylindrical section of the support platform (2) is slidably inserted into the through holes on the surface of the base (1), a top plate (3) is arranged above the support platform (2), the top plate (3) is a cylindrical structure of the same size as the support platform (2), a laser head (6) is arranged on the lower surface of the top plate (3), and the laser head (6) is a UV laser structure, characterized in that: The surface of the top plate (3) is provided with an annular track structure, and the annular track structure realizes the sequential processing of multiple circuit boards on the surface of the support platform (2) through the annular displacement of the laser head (6).

2. A punching machine for producing flexible printed circuit boards according to claim 1, characterized in that: The annular track structure comprises a sliding plate (4), wherein the sliding plate (4) is rotatably mounted in an annular track arranged on the lower surface of the top plate (3), an L-shaped support rod is arranged on the outer surface of the top plate (3) to fixedly connect the top plate (3) with the upper surface of the base (1), a guide rail (5) is arranged on the lower surface of the sliding plate (4), and two groups of guide rails (5) are arranged, wherein one of the guide rails (5) is fixedly mounted on the lower surface of the sliding plate (4), another guide rail (5) is slidably mounted on the surface of the guide rail (5), and a laser head (6) is slidably connected to the surface of the guide rail (5), and a driving mechanism is arranged inside the sliding plate (4) to realize the movement of the laser head (6).

3. A punching machine for producing flexible printed circuit boards according to claim 1, characterized in that: A lifting structure is provided on the surface of the supporting platform (2), and the lifting structure enables the flexible printed circuit board and the laser head (6) to be stably brought close to each other through the height change of the supporting platform (2).

4. A punching machine for producing flexible printed circuit boards according to claim 3, characterized in that: The lifting structure comprises a guide column (7), which is a cylindrical structure and is fixedly mounted on a circular portion of the lower surface of the top plate (3). The other end of the guide column (7) is inserted into the open cylindrical section of the support platform (2). The surface of the guide column (7) is provided with a long strip groove. A guide block (8) is slidably connected in the groove on the surface of the guide column (7). The cross section of the guide block (8) is an H-shaped structure, and the surface of the guide block (8) is fixedly connected to the inner wall of the cylindrical section of the support platform (2). The lower surface of the support platform (2) is fixedly mounted on the output end of the electric push rod (9), and the electric push rod (9) is fixedly mounted on the lower surface of the base (1).

5. A punching machine for producing flexible printed circuit boards according to claim 1, characterized in that: The surface of the supporting platform (2) is provided with a supporting groove (11), the inner wall of the supporting groove (11) is provided with a grille-shaped ventilation hole, and an adsorption fixing structure is provided inside the supporting platform (2), and the adsorption fixing structure achieves non-destructive fixation of the circuit board through the pressure difference between atmospheric pressure and the inside of the supporting platform (2).

6. A punching machine for producing flexible printed circuit boards according to claim 5, characterized in that: The adsorption fixing structure comprises an air guide cover (12), the air guide cover (12) being a square bucket structure, the upper surface of the air guide cover (12) being fixedly connected to the upper surface of the inner wall of the supporting platform (2), the upper surface of the air guide cover (12) completely wrapping the air vents on the surface of the supporting groove (11), the lower end of the air guide cover (12) being penetrated by a connecting pipe (13), the other end of the connecting pipe (13) being connected to a vacuum pump (14) via a telescopic hose, the vacuum pump (14) being fixedly mounted on the upper surface of the supporting plate (10), the supporting plate (10) being fixedly connected to the surface of the supporting legs on the lower surface of the base (1), the surface of the supporting platform (2) being provided with a plurality of supporting grooves (11) in an annular manner, the surface of each of the supporting grooves (11) being provided with an adsorption fixing structure.

7. A punching machine for producing flexible printed circuit boards according to claim 5, characterized in that: A reinforcement structure is provided on the upper surface of the supporting groove (11), and the reinforcement structure further clamps the circuit board from above the flexible printed circuit board by adsorbing the pressure difference generated by the fixing structure.

8. A punching machine for producing flexible printed circuit boards according to claim 7, characterized in that: The reinforcement structure comprises a guide cylinder (15), the guide cylinder (15) being a hollow cylindrical structure with an open upper surface, the guide cylinder (15) being embedded and fixed on the upper surface of the support platform (2), the lower surface of the guide cylinder (15) being connected to the connecting pipe (13) through a pipeline, a first slider (16) being slidably mounted on the inner wall of the guide cylinder (15), a limiting protrusion being arranged above the inner wall of the guide cylinder (15) to limit the first slider (16), the first slider (16) being a magnetic block structure, the outer surface of the guide cylinder (15) being slidably connected to a second slider (17), the second slider (17) being a circular ring structure, and the second slider (17) being a magnetic block structure, the first slider (16) and the second slider (17) being mutually attracted, the surface of the second slider (17) being fixedly connected to a pressing plate (18) through a connecting rod, the two ends of the pressing plate (18) being slidably connected to the inner wall of the support groove (11) respectively.

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