Mould locking system of high-speed packaging machine

Abstract

The invention discloses a mould locking system of a high-speed packaging machine, which comprises a control system, a head plate, a second plate, a tail plate, an ejection oil cylinder, a mould locking oil cylinder and pull rods, the four pull rods are arranged between the head plate and the tail plate, the second plate is arranged between the head plate and the tail plate and is slidably connected with the four pull rods, the ejection oil cylinder is arranged on the second plate, and the mould locking oil cylinder is arranged on the tail plate. The mold locking oil cylinder is arranged on the tail plate, the mold locking oil cylinder is connected with the second plate through a toggle rod mechanism, and the control system is connected with the ejection oil cylinder and the mold locking oil cylinder; wherein the diameter of the pull rod is increased, the thickness of the head plate is increased, and the thickness of the second plate is increased. An existing mold locking system is improved, the strength of the mold locking structure is improved, and the mold locking effect is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging machines, and in particular relates to a mold locking system of a high-speed packaging machine. Background Art

[0002] The injection molding process of high-speed packaging machines includes the injection process and the extraction process. Injection refers to high-pressure, high-speed, long-stroke injection, that is, the injection cylinder pushes the screw to move at high speed, and the screw head is subjected to the reaction force of the high-pressure plastic melt. Extraction refers to the extraction cylinder withdrawing the screw a short distance after the material storage is completed to prevent the melt from flowing, which only overcomes the friction of the screw, the viscosity of the plastic, etc., and the required force is relatively small.

[0003] The clamping system of the high-speed packaging machine is a key structure of the equipment itself. The existing clamping system has defects such as poor overall rigidity and no overload protection. In particular, the small diameter of the tie rod, the thin template and the large deformation make it unable to meet the production of thin-walled products. In addition, the clamping effect of the current high-speed packaging machine is insufficient. For example, the traditional copper sleeve of the tie rod guide has poor lubrication performance and the traditional combination of the pin shaft and steel sleeve has poor lubrication, which has a great impact on the clamping effect. Moreover, the existing high-speed packaging machine uses a general valve system to control the hydraulic system of opening and closing the mold. The position and speed control are not accurate, and the control system cannot meet the requirements of high-speed packaging machines for speed and safety. Therefore, it is necessary to improve the clamping system of the high-speed packaging machine. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a clamping system for a high-speed packaging machine, improve the existing clamping system, enhance the strength of the clamping structure and ensure the clamping effect.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0006] A locking system for a high-speed packaging machine comprises a control system, a head plate, a second plate, a tail plate, an ejector cylinder, a locking cylinder and tie rods, wherein four tie rods are arranged between the head plate and the tail plate, the second plate is located between the head plate and the tail plate, and the second plate is slidably connected to the four tie rods, the ejector cylinder is arranged on the second plate, the locking cylinder is arranged on the tail plate, the locking cylinder is connected to the second plate via a toggle mechanism, and the control system is connected to the ejector cylinder and the locking cylinder; wherein, as the diameter of the tie rod increases, the thickness of the head plate increases, and the thickness of the second plate increases.

[0007] Preferably, the diameter of the pull rod is 13-16 cm, the total thickness of the head plate is 35-40 cm, the thickness of the head plate at the code surface is 10-20 cm, the total thickness of the two plates is 50-60 cm, and the thickness of the two plates at the code surface is 15-30 cm.

[0008] Preferably, a graphite copper sleeve is provided at the connection between the two plates and the pull rod, and lubricating oil is stored in the graphite copper sleeve.

[0009] Preferably, the diameter of the pin in the toggle mechanism is 9 to 11 cm.

[0010] Preferably, in the toggle mechanism, the steel sleeve connected to the pin is an oil-containing steel sleeve formed by powder metallurgy, graphite and lubricating oil are stored in the oil-containing steel sleeve, and the lubricating oil reserve of the oil-containing steel sleeve is greater than or equal to 15% of the volume of the oil-containing steel sleeve.

[0011] Preferably, a high-sensitivity position sensor is arranged on the tail plate, and a clamping force strain sensor is arranged on the rear side of the tail plate.

[0012] Preferably, the mold locking system further comprises a mold locking hydraulic oil circuit, wherein the mold locking hydraulic oil circuit comprises a main mold locking module and an auxiliary mold locking module;

[0013] The main clamping module includes an oil pump, a piston, a three-position four-way solenoid reversing valve, a first oil tank and a second oil tank. The piston is in the middle to form a first cavity and a second cavity. The first oil tank is connected to the three-position four-way solenoid reversing valve through a first oil circuit. The oil pump is arranged on the first oil circuit. The second oil tank is connected to the three-position four-way solenoid reversing valve through a second oil circuit. The three-position four-way solenoid reversing valve is connected to the first cavity of the clamping cylinder through a third oil circuit and is connected to the second cavity of the clamping cylinder through a fourth oil circuit.

[0014] The auxiliary clamping module includes a cartridge valve and an electromagnetic control valve, wherein the cartridge valve is arranged on the third oil circuit, and the third oil circuit is divided into a third front oil circuit and a third rear oil circuit, wherein the third front oil circuit connects the first oil port of the cartridge valve with the three-position four-way electromagnetic reversing valve, and the third rear oil circuit connects the second oil port of the cartridge valve with the first cavity of the clamping cylinder, the control oil port of the cartridge valve is connected to the electromagnetic control valve through the fifth oil circuit, and the electromagnetic control valve is connected to the third rear oil circuit through the sixth oil circuit.

[0015] More preferably, the electromagnetic control valve is a two-position four-way electromagnetic reversing valve, and the fifth oil circuit and the sixth oil circuit are both connected to the two-position four-way electromagnetic reversing valve.

[0016] More preferably, the auxiliary clamping module further includes a third oil tank, and the third oil tank is connected to the two-position four-way electromagnetic reversing valve via a seventh oil circuit.

[0017] More preferably, the fifth oil circuit is provided with a pressure sensor for detecting the pressure of the fifth oil circuit.

[0018] Beneficial effects:

[0019] The present invention improves the existing mold locking system, realizes the movement position and speed of the mold locking cylinder, achieves the effect of controllable movement speed and position, improves the strength of the mold locking structure and ensures the mold locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is an overall schematic diagram of the present invention;

[0021] Figure 2 Shown is a schematic diagram of an angle of the present invention Figure 1 ;

[0022] Figure 3 Shown is another perspective view of the present invention Figure 2 ;

[0023] Figure 4 Shown is another perspective view of the present invention Figure 3 ;

[0024] Figure 5 Shown is a schematic diagram of the clamping hydraulic oil circuit of the present invention.

[0025] Figure numerals: 1-head plate, 2-second plate, 3-tail plate, 4-ejection cylinder, 5-clamping cylinder, 6-pull rod, 7-graphite copper sleeve, 8-elbow mechanism, 9-pin shaft, 10-control system, 11-high-sensitivity position sensor, 12-mold adjustment switch, 13-clamping force strain sensor, 14-oil-containing steel sleeve, 15-mold adjustment mechanism;

[0026] 501-first oil tank, 502-oil pump, 503-three-position four-way solenoid reversing valve, 504-second oil tank, 505-piston, 506-first cavity, 507-second cavity, 508-mold, 509-cartridge valve, 510-two-position four-way solenoid reversing valve, 511-third oil tank;

[0027] 512 - first oil circuit, 513 - second oil circuit, 514 - third front oil circuit, 515 - third rear oil circuit, 516 - fourth oil circuit, 517 - fifth oil circuit, 518 - sixth oil circuit, 519 - seventh oil circuit. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0029] like Figure 1-5As shown, the present invention proposes a clamping system of a high-speed packaging machine, comprising a head plate 1, a second plate 2, a tail plate 3, an ejector oil cylinder 4, a clamping oil cylinder 5 and a tie rod 6, wherein four tie rods 6 are arranged between the head plate 1 and the tail plate 3, the second plate 2 is between the head plate 1 and the tail plate 3, and the second plate 2 is slidably connected to the four tie rods 6, the ejector oil cylinder 4 is arranged on the second plate 2, the clamping oil cylinder 5 is arranged on the tail plate 3, and the clamping oil cylinder 5 is connected to the second plate 2 through a toggle mechanism 8; wherein, the diameter of the tie rod 6 is increased, so that the tensile deformation of the tie rod 6 is small during the clamping process, the thickness of the head plate 1 is increased, and the thickness of the second plate 2 is increased. Since the ejector oil cylinder 4 is installed on the second plate 2, the head plate 1 and the second plate 2 are subjected to large forces during the injection process, and the thickened head plate 1 and the second plate 2 can reduce their own deformation during the high-pressure injection process, the tail plate 3 is subjected to complex forces and can withstand high-speed impact, and the tail plate 3 is provided with a plurality of reinforcing ribs.

[0030] It is easy to understand that the size increase of the present invention is proposed for the clamping system of the existing high-speed packaging machine and does not limit the specific size value.

[0031] Preferably, the diameter of the pull rod 6 is 13-16 cm, and more preferably, the diameter of the pull rod 6 is 14 cm. The existing pull rod diameter is 12 cm.

[0032] Preferably, the total thickness of the head plate 1 is 35-40 cm, and the thickness of the head plate 1 at the code surface is 10-20 cm. More preferably, the total thickness of the head plate 1 is 35.5 cm, and the thickness of the head plate 1 at the code surface is 10.5 cm. The total thickness of the existing head plate is 32 cm, and the thickness at the code surface is 8 cm.

[0033] Preferably, the total thickness of the second plate 2 is 50-60 cm, and the thickness of the second plate 2 at the code surface is 15-30 cm. More preferably, the total thickness of the second plate 2 is 51.5 cm, and the thickness of the second plate 2 at the code surface is 20 cm. The total thickness of the existing head plate is 32 cm, and the thickness at the code surface is 8 cm.

[0034] In the present invention, a graphite copper sleeve 7 is provided at the connection between the second plate 2 and the pull rod 6. The graphite copper sleeve 7 serves as a guide and support for the second plate 2 when it moves along the pull rod 6 at high speed. During the high-speed movement of the second plate 2, the graphite released by the graphite copper sleeve 7 has a lubricating effect, reducing the wear of the pull rod 6 caused by the high-speed movement of the second plate 2 and reducing the energy loss caused by the large friction. Preferably, graphite and lubricating oil are stored in the graphite copper sleeve 7. During the movement of the second plate 2, the graphite copper sleeve 7 releases the graphite and lubricating oil, further reducing the friction during the high-speed movement.

[0035] The present invention also improves the elbow mechanism 8 to reduce the damage failure rate of the elbow mechanism 8. Specifically, the diameter of the pin 9 in the elbow mechanism 8 is increased to improve the strength of the pin 9. It is easy to understand that the increase in the diameter of the pin 9 is proposed for the elbow mechanism 8 of the existing high-speed packaging machine, and does not limit the specific size value. Preferably, the diameter of the pin 9 is 9 to 11 cm. More preferably, the diameter of the pin 9 is 9.5 cm. The existing pin diameter is 8 cm.

[0036] More preferably, in the toggle mechanism 8, the steel sleeve connected to the pin shaft 9 is an oil-containing steel sleeve 14 formed by powder metallurgy, and lubricating oil is stored in the oil-containing steel sleeve 14. More preferably, the lubricating oil reserve of the oil-containing steel sleeve 14 is greater than or equal to 15% of the volume of the oil-containing steel sleeve 14.

[0037] The pin 9 is preferably made of high tensile strength and high wear-resistant material. When the diameter of the pin 9 increases, the shear area of ​​the pin 9 increases, which reduces the contact stress and shear stress of the pin 9, effectively reduces the wear of the pin 9 and the oil-containing steel sleeve 14, and avoids the failure of the pin 9 and the oil-containing steel sleeve 14.

[0038] In the present invention, the tail plate 3 is provided with a mold adjustment mechanism 15, which controls the movement of the tail plate 3 at the end of the tie rod 6, and is used to adjust the position of the tail plate 3. The mold adjustment mechanism 15 is connected to a hydraulic motor. The mold adjustment mechanism 15 adopts a high-precision gear transmission mechanism. The hydraulic motor receives system instructions and drives the mold adjustment mechanism 15 to push the tail plate 3 to move along the tie rod 6. The mold adjustment switch 12 feeds back the precise position of the gear transmission of the mold adjustment mechanism 15, and precisely drives the tail plate 3 to move, which can achieve a minimum movement accuracy of 0.04mm.

[0039] A highly sensitive position sensor 11 is provided on the tail plate 3 to detect the moving position of the second plate 2, and a clamping force strain sensor 13 is provided on the rear side of the tail plate 3. Both the highly sensitive position sensor 11 and the clamping force strain sensor 13 are connected to the control system 10.

[0040] The mold adjustment process of the clamping hydraulic oil circuit is: the control system 10 sends a command to the proportional mold opening and closing hydraulic system, drives the clamping cylinder 5 to push the elbow mechanism 8, thereby driving the two plates 2 to move to achieve clamping. During this period, the high-sensitivity position sensor 11 has a detection accuracy of 0.01mm, and real-time feedback of the position of the two plates 2 is provided to facilitate the control system 10 to adjust the command. The proportional mold opening and closing hydraulic system controls the movement position and speed of the clamping cylinder 5 to achieve controllable movement speed and position. When reaching the clamping position, the clamping force strain sensor 13 feeds back a signal, and the control system 10 calculates the current clamping force. If the clamping force does not meet the requirements, the mold adjustment mechanism 15 is adjusted here until the clamping force meets the requirements.

[0041] The feedback signals of the high-sensitivity position sensor 11, the clamping force strain sensor 13 and the mold adjustment switch 12 of the mold adjustment mechanism 15 are conducive to the clamping system to quickly reach the required clamping force, and can effectively protect the system to avoid clamping force overload and damage to the structure.

[0042] The mold opening process of the clamping hydraulic oil circuit is: the control system 10 sends a command to the proportional mold opening and closing hydraulic system, drives the clamping cylinder 5 to push the elbow mechanism 8, drives the second plate 2 to move to realize mold opening, during which the high-sensitivity position sensor 11 feeds back the position of the second plate 2 in real time, the control system 10 adjusts the command, and the proportional mold opening and closing hydraulic system controls the moving position speed of the clamping cylinder 5 to achieve controllable moving speed and position, and accurately controls the second plate 2 to reach the mold opening position. The high-speed mold opening position accuracy is within 1 mm to avoid overtravel affecting the automatic removal of products.

[0043] like Figure 5 As shown, the clamping system of the present invention further includes a clamping hydraulic oil circuit, and the clamping hydraulic oil circuit includes a main clamping module and an auxiliary clamping module, as follows:

[0044] The main clamping module includes an oil pump 502, a piston 505, a three-position four-way electromagnetic reversing valve 503, a first oil tank 501 and a second oil tank 504. The piston 505 is in the clamping cylinder 5, so that a first cavity 506 and a second cavity 507 are formed in the clamping cylinder 5. The first oil tank 501 is connected to the three-position four-way electromagnetic reversing valve 503 through a first oil circuit 512. The oil pump 502 is arranged on the first oil circuit 512. The second oil tank 504 is connected to the three-position four-way electromagnetic reversing valve 503 through a second oil circuit 513. The three-position four-way electromagnetic reversing valve 503 is connected to the first cavity 506 of the clamping cylinder 5 through a third oil circuit, and is connected to the second cavity 507 of the clamping cylinder 5 through a fourth oil circuit 516.

[0045] The auxiliary clamping module includes a cartridge valve 509 and an electromagnetic control valve. The cartridge valve 509 is arranged on the third oil circuit, dividing the third oil circuit into a third front oil circuit 514 and a third rear oil circuit 515, wherein the third front oil circuit 514 connects the first oil port of the cartridge valve 509 with the three-position four-way electromagnetic reversing valve 503, and the third rear oil circuit 515 connects the second oil port of the cartridge valve 509 with the first cavity 506 of the clamping cylinder 5, and the control oil port of the cartridge valve 509 is connected to the electromagnetic control valve through the fifth oil circuit 517, and the electromagnetic control valve is connected to the third rear oil circuit 515 through the sixth oil circuit 518.

[0046] Combined with the figure, taking the process of locking the mold 508 as an example, the working principle of the clamping hydraulic oil circuit is as follows:

[0047] Locking the mold 508: The cartridge valve 509 connects the third front oil circuit 514 with the third rear oil circuit 515, that is, the third oil circuit is in a normally open state. Start the three-position four-way solenoid reversing valve 503 to connect the first oil circuit 512 with the third oil circuit, and connect the second oil circuit 513 with the fourth oil circuit 516. Start the oil pump 502 to transport the hydraulic oil in the first oil tank 501 to the first cavity 506 of the mold locking cylinder 5, push the piston to move rightward to lock the mold 508, and the hydraulic oil in the second cavity 507 returns to the second oil tank 504 through the fourth oil circuit 516 and the second oil circuit 513.

[0048] After the mold 508 is locked, the electromagnetic control valve is started to connect the fifth oil circuit 517 with the sixth oil circuit 518, and the hydraulic oil enters the control oil port of the cartridge valve 509 through the third rear oil circuit 515, the sixth oil circuit 518 and the fifth oil circuit 517, driving the cartridge valve 509 to close, disconnecting the third front oil circuit 514 from the third rear oil circuit 515. At the same time, the three-position four-way electromagnetic reversing valve 503 is started to disconnect the first oil circuit 512 from the third front oil circuit 514, and the oil pump 502 is turned off. The three-position four-way electromagnetic reversing valve 503 has a leakage problem. The mold locking hydraulic oil circuit realizes the automatic disconnection of the third oil circuit through the cartridge valve 509 and the electromagnetic control valve. The hydraulic oil of the third rear oil circuit 515 will not easily leak into the third front oil circuit 514, resulting in insufficient pressure in the mold locking cylinder 5, thereby preventing the mold 508 from being opened. Since the reaction force generated by the clamping cylinder 5 acts on the control port of the cartridge valve 509 through the hydraulic oil, the hydraulic oil in the third rear oil circuit 515 cannot flow back to the third front oil circuit 514 through the cartridge valve 509 .

[0049] Open the mold 508: After the injection molding is completed, the three-position four-way electromagnetic reversing valve 503 controls the first oil circuit 512 to be connected with the fourth oil circuit 516 and the third front oil circuit 514 to be connected with the second oil circuit 513. At the same time, the electromagnetic control valve disconnects the fifth oil circuit 517 from the sixth oil circuit 518 and empties the fifth oil circuit 517. In this process, the hydraulic oil that originally entered the control port of the cartridge valve 509 is discharged through the fifth oil circuit 517, and the cartridge valve 509 is reset to connect the third front oil circuit 514 with the third rear oil circuit 515.

[0050] Start the oil pump 502, and the hydraulic oil enters the second cavity 507 of the clamping cylinder 5 through the first oil circuit 512 and the fourth oil circuit 516, pushing the piston to move leftward. The hydraulic oil in the first cavity 506 enters the second oil tank 504 through the third oil circuit and the second oil circuit 513 for recovery.

[0051] Furthermore, the electromagnetic control valve is a two-position four-way electromagnetic reversing valve 510, and the fifth oil circuit 517 and the sixth oil circuit 518 are both connected to the two-position four-way electromagnetic reversing valve 510. In the final stage of locking the mold 508, the two-position four-way electromagnetic reversing valve 510 controls the fifth oil circuit 517 to be connected to the sixth oil circuit 518, and the fifth oil circuit 517 is disconnected from the sixth oil circuit 518 at other times.

[0052] Furthermore, the auxiliary clamping module further includes a third oil tank 511, which is connected to the two-position four-way electromagnetic reversing valve 510 through the seventh oil circuit 519. When the mold 508 is opened, the fifth oil circuit 517 is connected to the seventh oil circuit 519, and the hydraulic oil in the control port of the cartridge valve 509 enters the third oil tank 511 through the fifth oil circuit 517 and the seventh oil circuit 519 for recovery.

[0053] Furthermore, a pressure sensor is provided in the fifth oil circuit 517 to detect the pressure of the fifth oil circuit 517. In the final stage of the process of locking the mold 508, after the two-position four-way solenoid reversing valve 510 controls the fifth oil circuit 517 to be connected with the sixth oil circuit 518, part of the hydraulic oil enters the control port of the cartridge valve 509, and during this process, the pressure sensor detects the pressure inside the fifth oil circuit 517. After the three-position four-way solenoid reversing valve 503 disconnects the first oil circuit 512 from the third front oil circuit 514 and the oil pump 502 is turned off, at this time, the pressure is maintained, and the pressure sensor detects whether the pressure inside the fifth oil circuit 517 is normal. Specifically, when the pressure sensor detects that the pressure inside the fifth oil circuit 517 decreases, it indicates that the cartridge valve 509 may have a fault, and the third front oil circuit 514 may be connected with the third rear oil circuit 515. Therefore, the detection data of the pressure sensor can help the staff to find faults in advance.

[0054] Furthermore, the seventh oil circuit 519 is provided with a flow meter for detecting the flow of the hydraulic oil in the seventh oil circuit 519. When the mold 508 is opened, the seventh oil circuit 519 is connected with the fifth oil circuit 517, and the flow meter can detect whether the hydraulic oil is discharged through the seventh oil circuit 519. It is easy to understand that the oil pump 502 can be started to discharge the hydraulic oil in the first cavity 506 only when the fifth oil circuit 517 is connected with the seventh oil circuit 519, otherwise the third rear oil circuit 515 and the hydraulic cylinder may be damaged because the hydraulic oil cannot be discharged.

[0055] Since the maximum value of the hydraulic oil volume in the fifth oil circuit 517 and the control port of the cartridge valve 509 is determined, the flow meter detects the flow of the hydraulic oil in the seventh oil circuit 519 during the process of opening the mold 508 to detect whether the cartridge valve 509 is fully opened. For example, when the mold 508 is opened, the flow meter detects that the flow of the hydraulic oil in the seventh oil circuit 519 is small, indicating that the cartridge valve 509 has not been fully reset to connect the third front oil circuit 514 with the third rear oil circuit 515, and the staff can find it in time and intervene to deal with it.

[0056] Furthermore, one or more first oil ports are provided at the end of the first cavity 506 of the locking cylinder 5 away from the piston, and the one or more first oil ports are connected to the third rear oil circuit 515. One or more second oil ports are also provided at the end of the second cavity 507 away from the piston, and the one or more second oil ports are connected to the fourth oil circuit 516, so as to facilitate the rapid oil inflow or rapid oil outflow of the first cavity 506 and the second cavity 507.

[0057] The embodiments provided by the present invention are described in detail above. Specific examples are used herein to describe the principles and implementation methods of the present invention, and the description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A clamping system for a high-speed packaging machine, characterized in that: It comprises a control system (10), a head plate (1), a second plate (2), a tail plate (3), an ejection cylinder (4), a clamping cylinder (5) and a tie rod (6), wherein the four tie rods (6) are arranged between the head plate (1) and the tail plate (3), the second plate (2) is located between the head plate (1) and the tail plate (3), and the second plate (2) is slidably connected to the four tie rods (6), the ejection cylinder (4) is arranged on the second plate (2), the clamping cylinder (5) is arranged on the tail plate (3), the clamping cylinder (5) is connected to the second plate (2) via a toggle mechanism (8), and the control system (10) is connected to the ejection cylinder (4) and the clamping cylinder (5); wherein the thickness of the second plate (2) is greater than the thickness of the head plate (1).

2. The clamping system of the high-speed packaging machine according to claim 1 is characterized in that: The diameter of the pull rod (6) is 13 to 16 cm, the total thickness of the head plate (1) is 35 to 40 cm, the thickness of the head plate (1) at the code surface is 10 to 20 cm, the total thickness of the second plate (2) is 50 to 60 cm, and the thickness of the second plate (2) at the code surface is 15 to 30 cm.

3. The clamping system of the high-speed packaging machine according to claim 2 is characterized in that: A graphite copper sleeve (7) is provided at the connection between the two plates (2) and the pull rod (6), and graphite and lubricating oil are stored in the graphite copper sleeve (7).

4. The clamping system of the high-speed packaging machine according to claim 1 is characterized in that: The pin shaft (9) in the toggle mechanism (8) has a diameter of 9 to 11 cm.

5. The clamping system of the high-speed packaging machine according to claim 4 is characterized in that: In the toggle mechanism (8), the steel sleeve connected to the pin shaft (9) is an oil-containing steel sleeve (14) formed by powder metallurgy, wherein lubricating oil is stored in the oil-containing steel sleeve (14), and the lubricating oil reserve of the oil-containing steel sleeve (14) is greater than or equal to 15% of the volume of the oil-containing steel sleeve (14).

6. The clamping system of the high-speed packaging machine according to claim 1 is characterized in that: A high-sensitivity position sensor (11) is arranged on the tail plate (3), and a clamping force strain sensor (13) is arranged on the rear side of the tail plate (3).

7. The clamping system of the high-speed packaging machine according to any one of claims 1 to 6, characterized in that: It also includes a mold-locking hydraulic oil circuit, which includes a main mold-locking module and an auxiliary mold-locking module; The main mold locking module comprises an oil pump (502), a piston member (505), a three-position four-way electromagnetic reversing valve (503), a first oil tank (501) and a second oil tank (504); the piston member (505) is located in the mold locking cylinder (5), so that a first cavity (506) and a second cavity (507) are formed in the mold locking cylinder (5); the first oil tank (501) is connected to the three-position four-way electromagnetic reversing valve (503) through a first oil circuit (512); the oil pump (502) is arranged on the first oil circuit (512); the second oil tank (504) is connected to the three-position four-way electromagnetic reversing valve (503) through a second oil circuit (513); the three-position four-way electromagnetic reversing valve (503) is connected to the first cavity (506) of the mold locking cylinder (5) through a third oil circuit, and is connected to the second cavity (507) of the mold locking cylinder (5) through a fourth oil circuit (516); The auxiliary clamping module comprises a cartridge valve (509) and an electromagnetic control valve. The cartridge valve (509) is arranged on a third oil circuit, dividing the third oil circuit into a third front oil circuit (514) and a third rear oil circuit (515). The third front oil circuit (514) connects a first oil port of the cartridge valve (509) with a three-position four-way electromagnetic reversing valve (503), and the third rear oil circuit (515) connects a second oil port of the cartridge valve (509) with a first cavity (506) of a clamping cylinder (5). The control oil port of the cartridge valve (509) is connected to the electromagnetic control valve via a fifth oil circuit (517), and the electromagnetic control valve is connected to the third rear oil circuit (515) via a sixth oil circuit (518).

8. The clamping system of the high-speed packaging machine according to claim 7, characterized in that: The electromagnetic control valve is a two-position four-way electromagnetic reversing valve (510), and the fifth oil circuit (517) and the sixth oil circuit (518) are both connected to the two-position four-way electromagnetic reversing valve (510).

9. The clamping system of the high-speed packaging machine according to claim 7, characterized in that: The auxiliary clamping module further comprises a third oil tank (511), and the third oil tank (511) is connected to the two-position four-way electromagnetic reversing valve (510) via a seventh oil circuit (519).

10. The clamping system of the high-speed packaging machine according to claim 7, characterized in that: The fifth oil circuit (517) is provided with a pressure sensor for detecting the pressure of the fifth oil circuit (517).

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