Secondary forming device and mold

Abstract

The utility model belongs to the technical field of stamping dies, and particularly relates to a secondary forming device and a die. The secondary forming device is arranged on the die holder, and comprises an execution cylinder arranged on the die holder; the mold core is connected to the output end of the execution cylinder; and after the mold is closed, the execution cylinder is started to push the mold core for machining. According to the utility model, the execution cylinder is arranged on the die holder, and after the die is closed, the die core is pushed by the execution cylinder to carry out secondary processing on a material, so that overload processing can be realized in a one-time punching period, and the production cost is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of stamping die technology, and particularly relates to a secondary forming device and die. Background Technology

[0002] Stamping is a manufacturing process that uses stamping equipment (punch press) and dies to process metal or non-metal materials. Stamping is widely used in the automotive, home appliance, electronics, and machinery industries.

[0003] In the design of stamping dies, complex stamping processes often require higher blanking forces. In actual operation, since the tonnage of the punch press is constant, when the tonnage of the punch press cannot meet the blanking force requirements, the designer needs to optimize the stamping process by breaking it down into multiple simple steps to reduce the blanking force required for a single processing step.

[0004] However, using multiple simple processes can significantly increase production costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a secondary molding device and a mold. The secondary molding device can provide additional power to process materials, which can effectively reduce production costs.

[0006] Firstly, a secondary forming device is installed on the mold base, and the secondary forming device includes:

[0007] The actuator is mounted on the mold base.

[0008] The mold core is connected to the output end of the actuator cylinder;

[0009] After the mold is closed, the actuator is activated to push the mold core for processing.

[0010] Optionally, the actuator is a hydrodynamic cylinder.

[0011] Optionally, a mounting plate is fixedly provided at one end of the mold base, and the hydrodynamic cylinder includes:

[0012] Through holes are provided on the mounting plate, and the through holes pass through both ends of the mounting plate;

[0013] The cylinder head is located at the end of the mounting plate away from the mold base. The cylinder head and the mold base seal both ends of the through hole to form the cylinder cavity.

[0014] Optionally, the hydrodynamic cylinder may also include:

[0015] The piston is slidably connected in the through hole, and the piston divides the cylinder chamber into a first chamber and a second chamber.

[0016] A first flow channel, containing a first power medium, which enters or exits a first chamber through the first flow channel;

[0017] The second flow channel contains a second power medium, which is input into or output to the second chamber through the second flow channel.

[0018] The output shaft extends into the second chamber along the outside of the mounting plate, and one end of the output shaft extending into the second chamber is fixedly connected to the piston.

[0019] A through hole is provided on the cylinder head, through which the output shaft is inserted and extends out of the cylinder head.

[0020] Optionally, multiple hydrodynamic cylinders connected to the same mold core can be grouped together.

[0021] Optionally, the first runner is set on the mold base, and the second runner is set on the mounting plate;

[0022] The first flow channel includes a main channel and branch channels. One end of the main channel extends out of the mold base. The number of branch channels corresponds one-to-one with the number of fluid power cylinders. One end of the branch channel is connected to the main channel, and the other end of the branch channel is connected to the first chamber.

[0023] One end of the second flow channel extends out of the mounting plate, and the second flow channel extends into the mounting plate to connect the second chambers of the same group of fluid power cylinders in sequence.

[0024] Optionally, the secondary molding device may also include:

[0025] The first limiting plate is fixed relative to the mold base and fits with multiple cylinder heads. The first limiting plate is provided with a first through groove, into which the output shaft can be inserted.

[0026] Optionally, the secondary molding device may also include:

[0027] The second limiting plate is fixedly installed at the end of the first limiting plate away from the mold base. The second limiting plate is provided with a second through groove, and the mold core connected to a set of hydrodynamic cylinders is slidably connected to the second through groove.

[0028] Optionally, the second through groove includes a first groove and a second groove that are interconnected, with a stepped surface between the first groove and the second groove;

[0029] The secondary molding device also includes a guiding mechanism, which includes:

[0030] Guide holes are set on the stepped surface;

[0031] A connecting plate, one end of which is connected to the mold core;

[0032] The guide post is set on the connecting plate and is slidably connected to the guide hole.

[0033] Secondly, this utility model provides a mold, including the secondary molding device described in any one of the above.

[0034] Compared with the prior art, the beneficial effects of this utility model are:

[0035] This invention features an actuator cylinder on the mold base. After the mold is closed, the actuator cylinder pushes the mold core to perform secondary processing on the material, thereby enabling overload processing in a single stamping cycle and effectively reducing production costs. Attached Figure Description

[0036] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0037] Figure 1 This is the front view of the present invention;

[0038] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0039] Figure 3 This is a top view of the first limiting plate of this utility model;

[0040] Figure 4 This utility model Figure 3 Cross-sectional view;

[0041] Figure 5 This is a perspective view of the fluid power cylinder and mold core of this utility model;

[0042] Figure 6 This is a schematic diagram of the second limiting plate structure of this utility model;

[0043] Figure 7 This is a perspective view of the fluid power cylinder and mold base of this utility model;

[0044] Figure 8 This is a schematic diagram of the template, mounting plate, and cylinder head assembly structure of this utility model;

[0045] Figure 9 This utility model Figure 7 Cross-sectional view;

[0046] Figure 10 This is a schematic diagram of the output shaft of the fluid power cylinder of this utility model when it is fully extended.

[0047] Figure 11 This utility model Figure 9 Enlarged view of area A;

[0048] Figure 12 This utility model Figure 9 Enlarged view of area B;

[0049] Figure 13 This utility model Figure 9 Enlarged view of area C.

[0050] In the diagram: 1. Mold base; 11. Mounting bracket; 12. Connector; 13. Connecting pipe; 14. First mounting groove; 2. Mounting plate; 3. Hydrodynamic cylinder; 31. Through hole; 311. First chamber; 312. Second chamber; 32. Piston; 321. Round hole; 322. Buffer hole; 323. Blind hole; 33. Output shaft; 34. Cylinder head; 341. Through hole; 342. Boss; 35. First flow channel; 351. Main channel; 352. Branch channel; 36. Second flow channel; 37. Sealing component; 38. Sealing mechanism; 381. First sealing structure; 3811. First sealing component; 38 12. Mounting hole; 382. Second sealing structure; 3821. Second sealing element; 3822. Annular groove; 383. Third sealing structure; 3831. Third sealing element; 3832. Slot; 384. Fourth sealing structure; 3841. Fourth sealing element; 3842. Fifth sealing element; 3843. First slot; 3844. Second slot; 4. Mold core; 41. Connecting piece; 5. First limiting plate; 51. First through groove; 52. Second mounting groove; 6. Second limiting plate; 61. Second through groove; 7. Guide mechanism; 71. Guide hole; 72. Connecting plate; 73. Guide post. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Example 1

[0054] Please refer to Figure 1-13 This utility model provides a secondary forming device for stamping dies, which can achieve overload processing when the tonnage of the punch press is insufficient.

[0055] The secondary forming device is mounted on the mold base 1 and includes a mold core 4 and at least one actuator cylinder. The mold core 4 is connected to the output end of the actuator cylinder. During operation, the upper and lower molds of the mold close under the action of the punch press. After the mold closes, the actuator cylinder is activated, which pushes the mold core 4 to perform processing.

[0056] It should be noted that the processing performed on the mold core 4 includes, but is not limited to, punching, bending, flanging, and stretching.

[0057] It should be noted that the reference Figure 5 In this embodiment, multiple secondary molding devices can be set up as needed.

[0058] It should be noted that mold base 1 can be either the mold base 1 of the upper mold or the mold base 1 of the lower mold.

[0059] It should be noted that the overload processing in the above embodiments refers to stamping processing beyond the maximum punching force of the punch press.

[0060] It should be noted that the actuator in this solution can be any of the following: hydraulic cylinder, electric cylinder, and pneumatic cylinder.

[0061] As a preferred option, the actuator is a hydrodynamic cylinder 3. The hydrodynamic cylinder 3 has significant advantages in many applications, especially in terms of high power density, fast response, high precision control, high load capacity, simple structure, cost-effectiveness, environmental adaptability, energy efficiency, safety, and reliability.

[0062] Example 2

[0063] Please refer to Figure 7-13 The fluid power cylinder 3 in the above embodiments is described in detail. The fluid power cylinder 3 can be installed on the mold base 1 of the upper mold and / or lower mold. Its position is located inside the mold, which can avoid interference with the punch press during mold installation and reduce the installation space requirement. It is especially suitable for stamping dies.

[0064] The fluid power cylinder 3 is mounted on the mold base 1. One end of the mold base 1 is fixedly connected to the mounting plate 2. The mounting plate 2 has a through hole 31. The two ends of the through hole 31 are closed by the mold base 1 and the cylinder cover 34, respectively, thus forming a cylinder cavity.

[0065] This invention removes the end cap at one end of the fluid power cylinder 3 and uses the mold base 1 to seal the cylinder cavity, making the fluid power cylinder 3 of this invention more compact in the axial direction, thereby reducing the space requirement during installation.

[0066] It should be noted that the cylinder cavity refers to the space inside the hydraulic cylinder.

[0067] A piston 32 is slidably connected within the through hole 31, dividing the space within the through hole 31 into a first chamber 311 and a second chamber 312. The first chamber 311 is the space between the mold base 1 and the piston 32 in the through hole 31, and the second chamber 312 is the space between the cylinder head 34 and the piston 32 in the through hole 31. An output shaft 33 is fixedly connected to the piston 32, and the output shaft 33 extends out of the cylinder head 34 after passing through the through hole 341 on the cylinder head 34. The first chamber 311 is connected to a first flow channel 35, through which a first power medium flows into or out of the first chamber 311. The second chamber 312 is connected to a second flow channel 36, through which a second power medium flows into or out of the second chamber 312.

[0068] It should be noted that in this embodiment, the example is that only one hydrodynamic cylinder 3 is installed on the mounting plate 2.

[0069] It should be noted that the first power medium and the second power medium can be fluids such as hydraulic oil, compressed air, gas, water, synthetic fluid, and vegetable oil (i.e., the fluid power cylinder 3 can be a pneumatic cylinder or a hydraulic cylinder).

[0070] It should be noted that, in this embodiment, the mold base 1, mounting plate 2, and cylinder head 34 are fixed in the following way: Figure 8 As shown, the bolt passes through the cylinder head 34 and the mounting plate 2 in sequence and is threaded into the threaded hole on the mold base 1. The bolt head is restricted from passing through the cylinder head 34. Furthermore, to reduce the installation space requirement, a stepped hole is provided on the cylinder head 34, and the bolt head is engaged in the larger hole of the stepped hole. It should also be noted that the mold base 1, the mounting plate 2, and the cylinder head 34 can also be connected and fixed in other ways, such as snap-fit.

[0071] As a preferred option, refer to Figure 10 , Figure 11 A circular hole 321 is provided at one end of the piston 32 near the mold base 1. By providing the circular hole 321, the instantaneous pressure difference between the first chamber 311 and the second chamber 312 can be balanced, reducing the impact load on the sealing mechanism 38. The oil in the circular hole 321 can also form an oil film on the surface of the piston 32, preventing the piston 32 from dry friction with the through hole 31.

[0072] As a further preferred option, refer to Figure 10 , Figure 11A buffer hole 322 is provided on the circular hole 321. After the first power medium enters the first chamber 311, it collides with the buffer hole 322. The buffer hole 322 is tapered or spherical, which increases the contact area between the first power medium and the piston 32, reduces the impact force on the piston 32 per unit area, and helps to improve the service life of the piston 32.

[0073] As a further step, refer to Figure 10 , Figure 11 A blind hole 323 is provided at the bottom of the buffer hole 322. The end of the blind hole 323 that extends into the piston 32 is shaped like a spherical crown, which can further reduce the impact force and ensure the service life of the piston 32.

[0074] As a preferred option, refer to Figure 9 , Figure 11 , Figure 12 , Figure 13 The fluid power cylinder 3 is also provided with a sealing mechanism 38, which can prevent leakage of the first power medium in the first chamber 311 and the second power medium in the second chamber 312.

[0075] As a preferred option, refer to Figure 7 , Figure 8 It is also equipped with a mounting bracket 11, on which a connector 12 is provided to connect the second flow channel 36 to the connector 12 through a connecting pipe 13. This design can prevent the pipe connected to the second flow channel 36 from rubbing or colliding with the mold base 1, thereby improving the stability and reliability of use.

[0076] As a preferred option, a boss 342 is provided at one end of the cylinder head 34 near the mounting plate 2. The boss 342 is inserted into the through hole 31. By providing the boss 342, the coaxiality of the through hole 341 and the through hole 31 can be guaranteed, thus ensuring the installation accuracy.

[0077] As a preferred embodiment, the first flow channel 35 is disposed on the mold base 1, with one end of the first flow channel 35 communicating with the first chamber 311 and the other end extending out of the outer wall of the mold base 1.

[0078] It should be noted that the first flow channel 35 can also be set on the mounting plate 2.

[0079] As a preferred embodiment, the second flow channel 36 is disposed on the mounting plate 2, one end of the second flow channel 36 is connected to the second chamber 312, and the other end of the second flow channel 36 extends out of the outer wall of the mounting plate 2.

[0080] It should be noted that the second flow channel 36 can also be set on the cylinder head 34.

[0081] The working principle of this embodiment is as follows: when the fluid power cylinder 3 is started, the first power medium is input into the first chamber 311 through the first flow channel 35, and at the same time, the second power medium is output from the second chamber 312 through the second flow channel 36, causing the piston 32 to move towards the cylinder head 34. When the piston 32 is in contact with the cylinder head 34, the output shaft 33 reaches its maximum stroke. When the fluid power cylinder 3 is closed, the second power medium is input into the second chamber 312 through the second flow channel 36, and the first power medium is output from the first chamber 311 through the first flow channel 35. The piston 32 moves towards the mold base 1. When the piston 32 is in contact with the mold base 1, the output shaft 33 returns to its initial position.

[0082] It should be noted that a bushing is provided between the piston 32 and the through hole 31, and a bushing is provided between the output shaft 33 and the through hole 341.

[0083] Example 3

[0084] refer to Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 The structure of the sealing mechanism 38 in the above embodiments will be described in detail.

[0085] Sealing mechanism 38 includes:

[0086] First sealing structure 381, reference Figure 12 The first sealing structure 381 includes a first sealing element 3811 and a mounting hole 3812. The mounting hole 3812 is coaxially arranged with the through hole 31. The mounting hole 3812 is located at one end of the mounting plate 2 near the mold base 1. The first sealing element 3811 is disposed in the mounting hole 3812.

[0087] Second sealing structure 382, ​​reference Figure 12 The second sealing structure 382 includes a second sealing element 3821 and an annular groove 3822. The annular groove 3822 is disposed on the outer peripheral wall of the piston 32, and the second sealing element 3821 is disposed in the annular groove 3822.

[0088] Third sealing structure 383, reference Figure 13 The third sealing structure 383 includes a third sealing element 3831 and a groove 3832. The groove 3832 is located at one end of the cylinder head 34 near the mounting plate 2. The groove 3832 is coaxially arranged with the through hole 341. The third sealing element 3831 is located inside the groove 3832.

[0089] Fourth sealing structure 384, reference Figure 13The fourth sealing structure 384 includes a fourth sealing element 3841, a fifth sealing element 3842, a first locking hole 3843, and a second locking hole 3844. The first locking hole 3843 extends into the cylinder head 34 along the inner wall of the through hole 341, and the second locking hole 3844 extends into the cylinder head 34 along the inner wall of the through hole 341. The first locking hole 3843 and the second locking hole 3844 are respectively located at both ends of the through hole 341. Both the first locking hole 3843 and the second locking hole 3844 are coaxial with the through hole 341. The fourth sealing element 3841 is located in the first locking hole 3843, and the fifth sealing element 3842 is located in the second locking hole 3844.

[0090] The first sealing structure 381 and the second sealing structure 382 cooperate to seal the first chamber 311. The first sealing structure 381 can prevent the first power medium from leaking along the gap between the mounting plate 2 and the mold base 1, and the second sealing structure 382 can prevent the first power medium from leaking along the gap between the sealing piston 32 and the through hole 31. The second sealing structure 382, ​​the third sealing structure 383 and the fourth sealing structure 384 cooperate to seal the second chamber 312. The second sealing structure 382 can prevent the second power medium from leaking along the gap between the piston 32 and the through hole 31, the third sealing structure 383 can prevent the second power medium from leaking along the gap between the cylinder head 34 and the mounting plate 2, and the fourth sealing structure 384 can prevent the second power medium from leaking along the gap between the output shaft 33 and the through hole 341.

[0091] It should be noted that the first sealing element 3811, the second sealing element 3821, the third sealing element 3831, the fourth sealing element 3841 and the fifth sealing element 3842 in this utility model can all be implemented using existing sealing rings, such as O-rings, combination sealing rings, Y-rings, etc.

[0092] Example 4

[0093] refer to Figure 7 , Figure 9 The details describe the arrangement of the first flow channel 35 and the second flow channel 36 when there are multiple fluid power cylinders 3 connected to the same mold core 4.

[0094] The fluid power cylinders 3 connected to the same mold core 4 are set as a group. In order to ensure that multiple fluid power cylinders 3 in the same group can be synchronized, the following improvements are made.

[0095] The first flow channel 35 includes a main channel 351 and multiple branch channels 352. The number of branch channels 352 is the same as the number of first chambers 311 in a group of fluid power cylinders 3. One end of each branch channel 352 is connected to the main channel 351, and the other end is connected to the first chamber 311 of the corresponding fluid power cylinder 3. The main channel 351 is located inside the mold base 1, and one end of the main channel 351 extends out of the outer wall of the mold base 1. In this way, the first chambers 311 of the multiple fluid power cylinders 3 in the same group have the same pressure and response speed.

[0096] The second flow channel 36 is disposed within the mounting plate 2, and the second flow channel 36 connects the second chambers 312 of multiple fluid power cylinders 3 in the same group. One end of the second flow channel 36 extends out of the outer wall of the mounting plate 2. In this manner, the second chambers 312 of multiple fluid power cylinders 3 in the same group have the same pressure and response speed.

[0097] As a preferred embodiment, both ends of the second flow channel 36 extend beyond the outer wall of the mounting plate 2, and a sealing element 37 is provided at one end. The sealing element 37 is connected to the second flow channel 36 by threads. This method reduces manufacturing difficulty and maintenance costs.

[0098] It should be noted that the two ends of the main channel 351 can also be extended out of the mold base 1, and a sealing element 37 can be set at one end.

[0099] Example 5

[0100] refer to Figure 1-6 This section details the structure that restricts the movement of the mold core 4 when the secondary molding device uses the fluid power cylinder 3 of the above embodiment.

[0101] refer to Figure 2 , Figure 3 , Figure 4 A first limiting plate 5 is provided, which is fixed relative to the mold base 1. A first through groove 51 is provided on the first limiting plate 5, which passes through the upper and lower ends of the first limiting plate 5. During installation, the cylinder cover 34 of the fluid power cylinder 3 is close to the first limiting plate 5, and the output shaft 33 of the fluid power cylinder 3 is inserted into the first through groove 51. In this way, the mounting plate 2 and the cylinder cover 34 can be clamped between the first limiting plate and the mold base 1, further fixing the fluid power cylinder 3.

[0102] It should be noted that the first limiting plate 5 is fixed to the mold base 1 by means including but not limited to bolted, snap-fit ​​and other detachable connection methods.

[0103] As a preferred option, refer to Figure 7 , Figure 8 , Figure 9The mold base 1 is provided with a first mounting groove 14, and a part of the mounting plate 2 is inserted into the first mounting groove 14. In this way, the axial dimension of the hydrodynamic cylinder 3 can be further reduced.

[0104] As a further preferred option, refer to Figure 2 , Figure 3 , Figure 4 The first limiting plate 5 is provided with a second mounting groove 52, which corresponds to the first mounting groove 14. In the assembled state, the mold base 1 is in contact with the first limiting plate 5, and the mounting plate 2 is located between the first mounting groove 14 and the second mounting groove 52. This method can enclose the hydrodynamic cylinder 3, thereby avoiding interference from impurities generated during processing and improving the reliability of the device.

[0105] As a preferred option, refer to Figure 3 , Figure 4 , Figure 5 A connector 41 is provided at the end of the output shaft 33 away from the piston 32, and the other end of the connector 41 is connected to the mold core 4.

[0106] As a preferred option, refer to Figure 4 , Figure 5 Taking the use of a strip-shaped punch as an example, the die core 4 in this embodiment includes an upper die core and a lower die core, which are bolted together. The upper die core is fixed to the connecting piece, while the lower die core is in contact with the material to be processed. This method allows for quick replacement of the punch after it is damaged.

[0107] As a preferred embodiment, a second limiting plate 6 is also provided. The second limiting plate 6 is fixed to the end of the first limiting plate 5 away from the mold base 1. A second through groove 61 is provided on the second limiting plate 6. The second through groove 61 can guide the mold core 4 to move along the axial direction of the hydrodynamic cylinder 3. The second through groove 61 is a stepped groove. The second through groove 61 includes a first groove body and a second groove body that are connected to each other. There is a stepped surface between the first groove body and the second groove body.

[0108] As a preferred embodiment, a guide mechanism 7 is also provided. The guide mechanism 7 is used to guide the movement of the mold core 4. The guide mechanism 7 includes a guide hole 71 and a guide post 73. The guide hole 71 is provided on the stepped surface of the second through groove 61, and the guide post 73 is fixed to one side of the mold core 4 by a connecting plate 72.

[0109] It should be noted that the number of guide mechanisms 7 can be set to multiple. In this embodiment, two guide mechanisms 7 are symmetrically arranged along the length direction of the mold core 4 in actual use.

[0110] Example 6

[0111] This utility model provides a mold having the secondary forming device described in the above embodiment.

[0112] It should be noted that the secondary forming device can be installed on the upper mold and / or the lower mold.

[0113] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A secondary molding device provided on a mold base (1), characterized by comprising: The secondary forming device comprises: an execution cylinder arranged on a mold base (1); a mold core (4) connected to an output end of the execution cylinder; after the mold is closed, the execution cylinder is started to push the mold core (4) to process.

2. The device according to claim 1, wherein The execution cylinder is a fluid power cylinder (3).

3. The means of secondary forming according to claim 2, characterized in that, One end of the mold base (1) is fixedly provided with a mounting plate (2), and the fluid power cylinder (3) comprises: a through hole (31) arranged on the mounting plate (2), the through hole (31) penetrating through both ends of the mounting plate (2); a cylinder cover (34) arranged at an end of the mounting plate (2) away from the mold base (1), the cylinder cover (34) and the mold base (1) closing both ends of the through hole (31) to form a cylinder cavity.

4. The means of secondary forming according to claim 3, characterized in that, The fluid power cylinder (3) further comprises: a piston (32) slidably connected in the through hole (31), the piston (32) separating the cylinder cavity into a first chamber (311) and a second chamber (312); a first flow channel (35) having a first power medium, the first power medium being inputted or outputted from the first chamber (311) through the first flow channel (35); a second flow channel (36) having a second power medium, the second power medium being inputted or outputted from the second chamber (312) through the second flow channel (36); an output shaft (33) extending out of the mounting plate (2) and into the second chamber (312), one end of the output shaft (33) extending into the second chamber (312) being fixedly connected with the piston (32); a through hole (341) arranged on the cylinder cover (34), the output shaft (33) being inserted into the through hole (341) and extending out of the cylinder cover (34).

5. The device according to claim 4, wherein A plurality of fluid power cylinders (3) connected to the same mold core (4) form a group.

6. The device according to claim 5, wherein The first flow channel (35) is arranged on the mold base (1), and the second flow channel (36) is arranged on the mounting plate (2); The first flow channel (35) comprises a main channel (351) and a branch channel (352), one end of the main channel (351) extending out of the mold base (1), the number of the branch channels (352) corresponding to the number of the fluid power cylinders (3), one end of each branch channel (352) being connected with the main channel (351), and the other end of each branch channel (352) being in communication with the first chamber (311); One end of the second flow channel (36) extends out of the mounting plate (2), and the second flow channel (36) extends into the mounting plate (2) to sequentially communicate the second chambers (312) of the fluid power cylinders (3) in the same group.

7. The means of secondary forming according to claim 6, characterized in that The secondary forming device further comprises: a first limiting plate (5) fixed relative to the mold base (1), the first limiting plate (5) being in abutment with a plurality of cylinder covers (34), the first limiting plate (5) being provided with a first through slot (51), and the output shaft (33) being insertable into the first through slot (51).

8. The device according to claim 7, wherein The secondary forming device further comprises: a second limiting plate (6) fixedly arranged at an end of the first limiting plate (5) away from the mold base (1), the second limiting plate (6) being provided with a second through slot (61), and the mold core (4) connected to the group of fluid power cylinders (3) being slidably connected with the second through slot (61).

9. The device according to claim 8, wherein The second through groove (61) comprises a first groove body and a second groove body in communication with each other, and has a stepped surface between the first groove body and the second groove body; The overmolding device further comprises a guide mechanism (7), which comprises: A guide hole (71) arranged on the stepped surface of the second through groove (61); A connecting plate (72) having one end connected to the insert (4); A guide column (73) arranged on the connecting plate (72) and in sliding connection with the guide hole (71).

10. A mold characterized in that, The overmolding device comprises any one of claims 1-9.

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