Secondary inner core pulling device with locking mechanism and method

Abstract

The invention discloses a secondary inner core-pulling device with a locking mechanism and a method, the secondary inner core-pulling device comprises a lower die, an upper die, a slide block seat and a large slide block insert, guide columns are arranged at four corners of the lower die and the upper die, a die support is positioned at the bottom of the lower die, an oil cylinder seat is mounted at the front end of the lower die, a rear oil cylinder support is mounted at the front end of the oil cylinder seat, and the large slide block insert is inserted into the rear oil cylinder support. The front end of the rear oil cylinder support is provided with an oil cylinder body, the rear end of the oil cylinder body is provided with an oil cylinder supporting frame, a sliding block pressing block is installed in the lower die, a pull block is movably arranged on the sliding block pressing block, the sliding block base and the large sliding block insert are both located on the inner side of the pull block, and a guide block is arranged on the side of the large sliding block insert. According to the secondary inner core pulling device with the locking mechanism and the method, secondary core pulling positioning is carried out through the sliding block seat and the large sliding block insert, the locking mechanism is arranged, sliding and limiting between the sliding block seat and the pull block are facilitated, and the whole core pulling device is more stable.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a secondary inner core-pulling device and method with a locking mechanism. Background Technology

[0002] The slider structure on the slider, also known as the secondary core-pulling mechanism, has a backlash. The most important aspect of completing the secondary core-pulling is that the delayed action of the slider in the secondary movement must be safe and reliable, otherwise it will damage the product. After the mold is opened, the main body of the ejector block moves backward under the drive of the hydraulic cylinder, and the small slider insert moves downward under the action of the inclined guide rail of the ejector block, starting to pull out the backlash of the product slot. At the same time, the main body of the slider remains stationary under the action of the stop block. With the continuous development of technology, people's requirements for secondary internal core-pulling devices are also getting higher and higher.

[0003] Existing secondary internal core pulling devices have certain drawbacks. First, they cannot effectively lock and position the components, and the sliders may detach from the mold. The stability of core pulling cannot be adequately guaranteed, which is detrimental to user experience. Furthermore, existing secondary internal core pulling devices cannot be easily and quickly monitored and controlled, which negatively impacts practical use. Therefore, we propose a secondary internal core pulling device and method with a locking mechanism. Summary of the Invention

[0004] Technical problem to be solved: In view of the shortcomings of the prior art, the present invention provides a secondary inner core pulling device and method with a locking mechanism. The secondary core pulling and positioning is achieved by a slider seat and a large slider insert, and the locking mechanism facilitates the sliding and limiting of the slider seat and the pulling block. The entire core pulling device is more stable and can effectively solve the problems in the background art.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by this invention is as follows: a secondary inner core-pulling device with a locking mechanism, comprising a lower mold, an upper mold, a slider seat, and a large slider insert. Guide posts are provided at the four corners of both the lower and upper molds. A mold support is positioned at the bottom of the lower mold. A hydraulic cylinder seat is installed at the front end of the lower mold. A rear hydraulic cylinder support is installed at the front end of the hydraulic cylinder seat. A hydraulic cylinder body is installed at the front end of the rear hydraulic cylinder support. A hydraulic cylinder support frame is installed at the rear end of the hydraulic cylinder body. A slider is installed inside the lower mold. The block has a sliding block, on which a pull block is movably mounted. The sliding block seat and the large sliding block insert are both located inside the pull block. A guide block is provided on the side of the large sliding block insert. A sliding core is provided at the rear end of the sliding block seat. A T-shaped lever is installed in the middle of the large sliding block insert. The sliding core passes through the T-shaped lever. A clamping block is installed at the rear end of the large sliding block insert. The sliding core and the clamping block both abut against the clamping member. A limit block is integrally formed at the front end of the pull block. A locking mechanism is provided between the pull block and the sliding block seat.

[0006] As a preferred technical solution of this application, the locking mechanism includes a slot, a sealing ring, a piston rod, a cylinder, a positioning bracket, a status monitoring controller, and a monitoring probe. The positioning bracket is installed inside the slider seat, the cylinder is assembled in the middle of the positioning bracket, the piston rod is disposed inside the piston rod, the slot is opened on the inner side of the pull block, the sealing ring is disposed on the surface of the piston rod, the status monitoring controller is disposed on the positioning bracket, and the monitoring probe is disposed on the status monitoring controller.

[0007] As a preferred technical solution of this application, the status monitoring controller is provided with a slide position monitoring module, a communication module, a central processing module, a locking control module, a hydraulic cylinder control module, an indicator light module, and a locking status monitoring module. The slide position monitoring module and the locking status monitoring module are both connected to the communication module. The communication module is connected to the central processing module. The central processing module is connected to the locking control module, the hydraulic cylinder control module, and the indicator light module.

[0008] As a preferred technical solution of this application, the lower mold and the upper mold are pressed together by guide pillars, the main body of the oil cylinder drives the slider seat to move back and forth inside the pull block through the oil cylinder shaft, the large slider insert is positioned between the guide block and the pull block, and when the slider seat slides to the position of the limit block, it drives the pull block to slide on the slider pressing block.

[0009] As a preferred technical solution of this application, the slider seat drives the slider core to move back and forth to pull the core, the large slider insert drives the clamping block to move back and forth to pull the core, and the slider core and the clamping block abut against the position of the clamping member.

[0010] As a preferred technical solution of this application, the cylinder is installed by a positioning bracket, the cylinder drives the piston rod to extend and retract, the front end of the piston rod is sealed and positioned by a sealing ring and a slot, and multiple sets of slots are distributed on the inner side of the pull block, the piston rod and the slot cooperate to lock the pull block and the slider seat.

[0011] As a preferred technical solution of this application, the output terminals of the slide position monitoring module and the locking status monitoring module are electrically connected to the input terminal of the central processing module through the communication module, and the output terminal of the central processing module is electrically connected to the input terminals of the locking control module, the hydraulic cylinder control module and the indicator light module.

[0012] A secondary inner core pulling method with a locking mechanism specifically includes the following steps: S1: After the molding is completed, the piston rod is retracted by the cylinder to unlock, and the cylinder body drives the cylinder shaft to move the slider seat to slide once in the inner position of the pull block, thereby pulling the slider core. S2: When the slider seat moves to the limit block, it transmits the force to the pull block, causing the pull block to slide on the slider pressure block. The pull block then drives the large slider insert to slide for a second core pulling, which in turn drives the pressure block to pull the core. S3: When the core is pulled to the end, the cylinder drives the piston rod to extend and engage with the slot on the inside of the pull block, locking the slider seat and the pull block together. S4: When the slider seat and the pull block are locked, the cylinder body drives the pull block to move forward through the cylinder shaft, which in turn drives the large slider insert and the pressing block to move forward and press the pressing part. S5: The piston rod is retracted by the cylinder. At this time, the slider seat is unlocked from the pull block. The cylinder shaft continues to move forward, causing the slider seat to move forward inside the pull block. This causes the slider core to press against the clamping part. The piston rod is then extended by the cylinder to relock the pull block and slider seat, and the cycle continues.

[0013] Beneficial Effects: Compared with the prior art, the present invention provides a secondary inner core-pulling device and method with a locking mechanism, which has the following beneficial effects: This secondary inner core-pulling device and method with a locking mechanism uses a slider seat and a large slider insert for secondary core-pulling positioning, and has a locking mechanism to facilitate sliding and limiting between the slider seat and the pull block. The entire core-pulling device is more stable. After the molding is completed, the piston rod is retracted by the cylinder to unlock it. The cylinder body drives the cylinder shaft to drive the slider seat to slide once inside the pull block, pulling the slider core. When the slider seat moves to the limiting block, it transmits force to the pull block, causing the pull block to slide on the slider pressure block, and the pull block drives the core to slide. The large slider insert slides twice to pull the core, causing the clamping block to pull the core. When the core is pulled to the end, the cylinder drives the piston rod to extend and engage with the slot inside the pull block, locking the slider seat and the pull block. When the slider seat and the pull block are locked, the hydraulic cylinder body drives the pull block to move forward through the hydraulic cylinder shaft, causing the large slider insert and the clamping block to move forward and press the clamping part. The piston rod is retracted by the cylinder, at which point the slider seat and the pull block are unlocked. The hydraulic cylinder shaft continues to move forward, causing the slider seat to move forward inside the pull block, causing the slider core to press the clamping part. The piston rod is then extended by the cylinder to relock the pull block and the slider seat, repeating the cycle. The entire secondary inner core pulling device has a simple structure, is easy to operate, and performs better than the traditional method. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a secondary inner core-pulling device and method with a locking mechanism according to the present invention.

[0015] Figure 2 This is a schematic diagram of the slider seat in a secondary inner core-pulling device and method with a locking mechanism according to the present invention.

[0016] Figure 3This is a top view of the structure of a secondary inner core-pulling device and method with a locking mechanism according to the present invention.

[0017] Figure 4 This is a structural schematic diagram of point A in the secondary inner core-pulling device and method with a locking mechanism of the present invention.

[0018] Figure 5 This is a schematic diagram of the state monitoring controller in a secondary inner core pulling device and method with a locking mechanism according to the present invention.

[0019] In the diagram: 1. Lower mold; 2. Guide pillar; 3. Upper mold; 4. Mold support; 5. Hydraulic cylinder seat; 6. Rear hydraulic cylinder support; 7. Hydraulic cylinder body; 8. Limit block; 9. Pull block; 10. Slider seat; 11. Large slider insert; 12. Slider core; 13. T-shaped lever; 14. Clamping component; 15. Guide block; 16. Slider clamping block; 17. Cylinder; 18. Positioning bracket; 19. Hydraulic cylinder support frame; 20. Hydraulic cylinder shaft; 21. Slot; 22. Sealing ring; 23. Piston rod; 24. Status monitoring controller; 25. Monitoring probe; 26. Slider position monitoring module; 27. Communication module; 28. Central processing module; 29. ​​Locking control module; 30. Hydraulic cylinder control module; 31. Indicator light module; 32. Locking status monitoring module; 33. Clamping block. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figure 1-5 As shown, a secondary inner core-pulling device with a locking mechanism includes a lower mold 1, an upper mold 3, a slider seat 10, and a large slider insert 11. Guide posts 2 are provided at the four corners of both the lower mold 1 and the upper mold 3. A mold support 4 is positioned at the bottom of the lower mold 1. A cylinder seat 5 is installed at the front end of the lower mold 1. A rear cylinder support 6 is installed at the front end of the cylinder seat 5. A cylinder body 7 is installed at the front end of the rear cylinder support 6. A cylinder support frame 19 is installed at the rear end of the cylinder body 7. A slider pressure block 16 is installed inside the lower mold 1. A pull block 9 is movably arranged on the slider pressure block 16. The slider seat 10 and the large slider insert 11 are both located inside the pull block 9. A guide block 15 is provided on the side of the large slider insert 11. A slider core 12 is provided at the rear end of the slider seat 10. A T-shaped lever 13 is installed in the middle of the large slider insert 11, through which the slider core 12 passes. A clamping block 33 is installed at the rear end of the large slider insert 11. The slider core 12 and the clamping block 33 both abut against the clamping member 14. The front end of the pull block 9 is integrally formed with a limiting block 8. A locking mechanism is provided between the pull block 9 and the slider seat 10. The lower mold 1 and the upper mold 3 are pressed together by the guide post 2. The oil cylinder body 7 drives the slider seat 10 to move back and forth inside the pull block 9 through the oil cylinder shaft 20. The large slider insert 11 is positioned between the pull block 9 and the guide block 15. When the slider seat 10 slides to the position of the limiting block 8, it drives the pull block 9 to slide on the slider pressing block 16. The slider seat 10 drives the slider core 12 to move back and forth to pull the core. The large slider insert 11 drives the clamping block 33 to move back and forth to pull the core. The slider core 12 and the clamping block 33 abut against the clamping member 14. The slider seat and the large slider insert perform secondary core pulling and positioning, and have a locking mechanism, which facilitates the sliding and limiting between the slider seat and the pull block. The whole core pulling device is more stable.

[0024] The locking mechanism includes a slot 21, a sealing ring 22, a piston rod 23, a cylinder 17, a positioning bracket 18, a status monitoring controller 24, and a monitoring probe 25. The positioning bracket 18 is installed inside the slider seat 10. The cylinder 17 is assembled in the middle of the positioning bracket 18. The piston rod 23 is located inside the piston rod 23. The slot 21 is opened on the inner side of the pull block 9. The sealing ring 22 is located on the surface of the piston rod 23. The status monitoring controller 24 is located on the positioning bracket 18. The monitoring probe 25 is located on the status monitoring controller 24. The cylinder 17 is installed through the positioning bracket 18. The cylinder 17 drives the piston rod 23 to extend and retract. The front end of the piston rod 23 is sealed and positioned with the slot 21 through the sealing ring 22. Multiple sets of slots 21 are distributed on the inner side of the pull block 9. The piston rod 23 and the slot 21 cooperate to lock the pull block 9 and the slider seat 10.

[0025] The status monitoring controller 24 is equipped with a slide position monitoring module 26, a communication module 27, a central processing module 28, a locking control module 29, a hydraulic cylinder control module 30, an indicator light module 31, and a locking status monitoring module 32. The slide position monitoring module 26 and the locking status monitoring module 32 are both connected to the communication module 27. The communication module 27 is connected to the central processing module 28. The central processing module 28 is connected to the locking control module 29, the hydraulic cylinder control module 30, and the indicator light module 31. The output terminals of the slide position monitoring module 26 and the locking status monitoring module 32 are electrically connected to the input terminals of the central processing module 28 through the communication module 27. The output terminal of the central processing module 28 is electrically connected to the input terminals of the locking control module 29, the hydraulic cylinder control module 30, and the indicator light module 31.

[0026] A secondary inner core pulling method with a locking mechanism specifically includes the following steps: S1: After the molding is completed, the piston rod 23 is retracted by the cylinder 17 to unlock, and the cylinder shaft 20 is driven by the cylinder body 7 to drive the slider seat 10 to slide once inside the pull block 9, thereby pulling the slider core 12. S2: When the slider seat 10 moves to the limit block 8, it transmits the force to the pull block 9, causing the pull block 9 to slide on the slider pressure block 16, and through the pull block 9, it causes the large slider insert 11 to slide for a second core pulling, causing the pressure block 33 to pull the core. S3: When the core is pulled to the end, the cylinder 17 drives the piston rod 23 to extend and engage with the slot 21 inside the pull block 9, locking the slider seat 10 and the pull block 9. S4: When the slider seat 10 and the pull block 9 are locked, the cylinder body 7 drives the pull block 9 to move forward through the cylinder shaft 20, which drives the large slider insert 11 and the pressing block 33 to move forward and press the pressing part 14. S5: The piston rod 23 is retracted by the cylinder 17. At this time, the slider seat 10 is unlocked from the pull block 9. The cylinder shaft 20 continues to move forward, causing the slider seat 10 to move forward inside the pull block 9, causing the slider core 12 to press the clamping part 14. The piston rod 23 is extended by the cylinder 17 to relock the pull block 9 and the slider seat 10, and the cycle continues.

[0027] Working principle: This invention includes a lower mold 1, guide pillar 2, upper mold 3, mold support 4, hydraulic cylinder seat 5, rear hydraulic cylinder support 6, hydraulic cylinder body 7, limit block 8, pull block 9, slider seat 10, large slider insert 11, slider core 12, T-shaped lever 13, clamping part 14, guide block 15, slider pressure block 16, cylinder 17, positioning bracket 18, hydraulic cylinder support frame 19, hydraulic cylinder shaft 20, slot 21, sealing ring 22, piston rod 23, status monitoring controller 24, monitoring probe 25, and slide position monitoring... The module comprising the measurement module 26, communication module 27, central processing module 28, locking control module 29, hydraulic cylinder control module 30, indicator light module 31, locking status monitoring module 32, and clamping block 33, after completing the molding process, unlocks the circuit by retracting the piston rod 23 via the cylinder 17. The hydraulic cylinder body 7 drives the cylinder shaft 20 to slide the slider seat 10 once inside the pull block 9, pulling the slider core 12. When the slider seat 10 moves to the limit block 8, it transmits force to the pull block 9. The pull block 9 slides on the slider pressure block 16, and the pull block 9 drives the large slider insert 11 to slide for a second core pulling, which in turn drives the pressure block 33 to pull the core. When the core is pulled to the end, the cylinder 17 drives the piston rod 23 to extend and engage with the slot 21 inside the pull block 9, locking the slider seat 10 and the pull block 9. When the slider seat 10 and the pull block 9 are locked, the cylinder body 7 drives the pull block 9 to move forward through the cylinder shaft 20, which in turn drives the large slider insert 11 and the pressure block 33 to move forward and press the pressure member 14. Cylinder 17 drives the piston rod 23 to retract. At this time, the slider seat 10 and the pull block 9 are unlocked. The cylinder shaft 20 continues to move forward, driving the slider seat 10 to move forward inside the pull block 9, driving the slider core 12 to press the clamping member 14, and driving the piston rod 23 to extend through the cylinder 17, relocking the pull block 9 and the slider seat 10, and performing a cycle. The slider seat and the large slider insert perform secondary core pulling positioning, and have a locking mechanism to facilitate sliding and limiting between the slider seat and the pull block, making the entire core pulling device more stable.

[0028] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A secondary inner core-pulling device with a locking mechanism, comprising a lower mold (1), an upper mold (3), a slider seat (10), and a large slider insert (11), characterized in that: The lower mold (1) and the upper mold (3) are provided with guide pillars (2) at their four corners. The bottom of the lower mold (1) is positioned with a mold support (4). The front end of the lower mold (1) is equipped with a cylinder seat (5). The front end of the cylinder seat (5) is equipped with a rear cylinder support (6). The front end of the rear cylinder support (6) is equipped with a cylinder body (7). The rear end of the cylinder body (7) is equipped with a cylinder support frame (19). The lower mold (1) is equipped with a slider pressure block (16). A pull block (9) is movably arranged on the slider pressure block (16). The slider seat (10) and the large slider insert (11) are both located at... Inside the pull block (9), a guide block (15) is provided on the side of the large slider insert (11), a slider core (12) is provided at the rear end of the slider seat (10), a T-shaped lever (13) is installed in the middle of the large slider insert (11), the slider core (12) passes through the T-shaped lever (13), a clamping block (33) is installed at the rear end of the large slider insert (11), the slider core (12) and the clamping block (33) both abut against the clamping member (14), a limit block (8) is integrally formed at the front end of the pull block (9), and a locking mechanism is provided between the pull block (9) and the slider seat (10).

2. The secondary inner core-pulling device with a locking mechanism according to claim 1, characterized in that: The locking mechanism includes a slot (21), a sealing ring (22), a piston rod (23), a cylinder (17), a positioning bracket (18), a status monitoring controller (24), and a monitoring probe (25). The positioning bracket (18) is installed inside the slider seat (10). The cylinder (17) is assembled in the middle of the positioning bracket (18). The piston rod (23) is located inside the piston rod (23). The slot (21) is opened on the inner side of the pull block (9). The sealing ring (22) is located on the surface of the piston rod (23). The status monitoring controller (24) is located on the positioning bracket (18). The monitoring probe (25) is located on the status monitoring controller (24).

3. A secondary inner core-pulling device with a locking mechanism according to claim 2, characterized in that: The status monitoring controller (24) is equipped with a slide position monitoring module (26), a communication module (27), a central processing module (28), a locking control module (29), a hydraulic cylinder control module (30), an indicator light module (31), and a locking status monitoring module (32). The slide position monitoring module (26) and the locking status monitoring module (32) are both connected to the communication module (27). The communication module (27) is connected to the central processing module (28). The central processing module (28) is connected to the locking control module (29), the hydraulic cylinder control module (30), and the indicator light module (31).

4. A secondary inner core-pulling device with a locking mechanism according to claim 1, characterized in that: The lower mold (1) and the upper mold (3) are pressed together by guide post (2). The cylinder body (7) drives the slider seat (10) to move back and forth inside the pull block (9) through the cylinder shaft (20). The large slider insert (11) is positioned between the guide block (15) and the pull block (9). When the slider seat (10) slides to the position of the limit block (8), it drives the pull block (9) to slide on the slider pressing block (16).

5. A secondary inner core-pulling device with a locking mechanism according to claim 1, characterized in that: The slider seat (10) drives the slider core (12) to move back and forth to pull the core, and the large slider insert (11) drives the pressing block (33) to move back and forth to pull the core. The slider core (12) and the pressing block (33) abut against the pressing member (14).

6. A secondary inner core-pulling device with a locking mechanism according to claim 2, characterized in that: The cylinder (17) is installed by a positioning bracket (18). The cylinder (17) drives the piston rod (23) to extend and retract. The front end of the piston rod (23) is sealed and positioned by a sealing ring (22) and a slot (21). Multiple sets of slots (21) are distributed on the inner side of the pull block (9). The piston rod (23) and the slot (21) cooperate to lock the pull block (9) and the slider seat (10).

7. A secondary inner core-pulling device with a locking mechanism according to claim 3, characterized in that: The output terminals of the slide position monitoring module (26) and the locking status monitoring module (32) are electrically connected to the input terminal of the central processing module (28) through the communication module (27). The output terminal of the central processing module (28) is electrically connected to the input terminal of the locking control module (29), the cylinder control module (30) and the indicator light module (31).

8. A secondary inner core-pulling method with a locking mechanism, characterized in that: Specifically, the following steps are included: S1: After the molding is completed, the piston rod (23) is retracted by the cylinder (17) to unlock, and the cylinder shaft (20) is driven by the cylinder body (7) to drive the slider seat (10) to slide once in the inner position of the pull block (9), thereby pulling the slider core (12) out. S2: When the slider seat (10) moves to the limit block (8), it transmits the force to the pull block (9), causing the pull block (9) to slide on the slider pressure block (16), and through the pull block (9) it drives the large slider insert (11) to slide for a second core pulling, causing the pressure block (33) to pull the core. S3: When the core is pulled to the end, the cylinder (17) drives the piston rod (23) to extend and engage with the slot (21) inside the pull block (9), locking the slider seat (10) and the pull block (9); S4: When the slider seat (10) and the pull block (9) are locked, the cylinder body (7) drives the pull block (9) to move forward through the cylinder shaft (20), which drives the large slider insert (11) and the pressing block (33) to move forward and press the pressing part (14). S5: The piston rod (23) is retracted by the cylinder (17). At this time, the slider seat (10) and the pull block (9) are unlocked. The cylinder shaft (20) continues to move forward, causing the slider seat (10) to move forward inside the pull block (9), causing the slider core (12) to press the clamping part (14), and the piston rod (23) is extended by the cylinder (17) to relock the pull block (9) and the slider seat (10) and perform a cycle.

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