Glue injection hydraulic oil way of high-speed packaging machine

Abstract

The invention discloses a high-speed packaging machine glue injection hydraulic oil way which comprises a glue injection oil cylinder, an oil supply module, an energy storage module, a dynamic valve module and an oil return module. The oil supply module comprises an oil pump, a first oil tank and an oil supply way, the oil supply way comprises a main oil way, a first oil way and a second oil way, the main oil way is connected with the oil pump, and the first oil way and the second oil way are both connected with the main oil way; the energy storage module comprises an energy accumulator and a first one-way valve, the first one-way valve is arranged on the first oil way, and the energy accumulator is connected with the first one-way valve; the dynamic valve module comprises a dynamic valve and a first two-position four-way electromagnetic directional valve, the energy accumulator is connected with the first two-position four-way electromagnetic directional valve, the first two-position four-way electromagnetic directional valve is connected with a control port of the dynamic valve, a first oil inlet of the dynamic valve is connected with the second oil way, and a first oil outlet of the dynamic valve is connected with a first cavity of the glue injection oil cylinder; and the oil return module is connected with the second cavity of the glue injection oil cylinder. The response time of the glue injection action is prolonged through the dynamic valve.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding, and in particular relates to a hydraulic oil circuit for injection molding of a high-speed packaging machine. Background Art

[0002] The injection speed requirement of high-speed packaging machines is very high, generally above 400mm / s, and the oil pump motor starts very quickly. The structure of the existing equipment to control the injection action is an ordinary two-way cartridge valve (hereinafter referred to as the passive valve), which is passively opened. Its opening speed is slower than the oil pump start-up speed. The valve is opened only when the hydraulic oil in the main oil circuit reaches the valve port. This results in a high pressure at the passive valve before the passive valve is opened during the injection action. At the moment of opening, the instantaneous decrease in pressure will produce a lot of noise, and the action response is not high. Therefore, it is necessary to improve the injection oil circuit of the existing high-speed packaging machine. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a high-speed packaging machine injection hydraulic oil circuit, which improves the response time of the injection action through a dynamic valve.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0005] A high-speed packaging machine injection hydraulic oil circuit, comprising an injection cylinder and an oil supply module, an energy storage module, a dynamic valve module and an oil return module;

[0006] The oil supply module comprises an oil pump, a first oil tank and an oil supply oil circuit, the oil pump is connected to the first oil tank, the oil supply oil circuit comprises a main oil circuit, a first oil circuit and a second oil circuit, the main oil circuit is connected to the oil pump, and the first oil circuit and the second oil circuit are both connected to the main oil circuit;

[0007] The energy storage module comprises an accumulator and a first one-way valve, the first one-way valve is arranged on the first oil circuit, and the accumulator is connected to the first one-way valve through a third oil circuit;

[0008] The dynamic valve module includes a dynamic valve and a first two-position four-way electromagnetic reversing valve, the accumulator is connected to the first two-position four-way electromagnetic reversing valve through a fourth oil circuit, the first two-position four-way electromagnetic reversing valve is connected to the control port of the dynamic valve through a fifth oil circuit, the first oil inlet of the dynamic valve is connected to the second oil circuit, and the first oil outlet of the dynamic valve is connected to the first cavity of the injection cylinder through a sixth oil circuit;

[0009] The oil return module is connected to the second cavity of the injection cylinder.

[0010] Preferably, the oil return module includes a second oil tank, a first cartridge solenoid valve, a relief valve, a ninth oil circuit and a tenth oil circuit, the second cavity of the injection cylinder is connected to the ninth oil circuit, the ninth oil circuit is connected to the tenth oil circuit, the tenth oil circuit is connected to the second oil tank, the relief valve and the first cartridge solenoid valve are arranged on the tenth oil circuit, wherein the first cartridge solenoid valve is located between the relief valve and the second oil tank.

[0011] More preferably, the oil return module further includes a second cartridge solenoid valve and an eleventh oil circuit, the ninth oil circuit is also connected to the eleventh oil circuit, the eleventh oil circuit is connected to the second oil tank, and the second cartridge solenoid valve is arranged on the eleventh oil circuit.

[0012] Preferably, the dynamic valve module also includes a third oil tank, the second oil outlet of the dynamic valve is connected to the first two-position four-way solenoid reversing valve through the seventh oil circuit, and the first two-position four-way solenoid reversing valve is connected to the third oil tank through the eighth oil circuit.

[0013] Preferably, a twelfth oil circuit is also provided between the ninth oil circuit and the second oil tank, and a second one-way valve is provided on the twelfth oil circuit to allow the oil in the second oil tank to flow into the second cavity of the injection cylinder and to restrict the oil in the second oil cylinder of the injection cylinder from flowing to the second oil tank through the twelfth oil circuit.

[0014] Preferably, the injection hydraulic oil circuit of the high-speed packaging machine also includes an oil return control module, which includes a three-position four-way solenoid reversing valve, a cartridge valve and a second two-position four-way solenoid reversing valve, the liquid inlet of the cartridge valve is connected to the sixth oil circuit through the thirteenth oil circuit, the liquid outlet of the cartridge valve is connected to the second oil tank through the fourteenth oil circuit, the accumulator is connected to the three-position four-way solenoid reversing valve through the fifteenth oil circuit, a second two-position four-way solenoid reversing valve is arranged on the fifteenth oil circuit, and the three-position four-way solenoid reversing valve is connected to the control port of the cartridge valve through the sixteenth oil circuit.

[0015] More preferably, the oil return control module also includes a proportional back pressure valve, the three-position four-way solenoid reversing valve is also connected to the fifteenth oil circuit through the seventeenth oil circuit, the three-position four-way solenoid reversing valve is also connected to the fifteenth oil circuit through the eighteenth oil circuit, the three-position four-way solenoid reversing valve connects or disconnects the seventeenth oil circuit with the eighteenth oil circuit, and the proportional back pressure valve is arranged on the eighteenth oil circuit.

[0016] Preferably, a third two-position four-way solenoid reversing valve is also provided in the eleventh oil circuit, and the third two-position four-way solenoid reversing valve is located between the second plug-in solenoid valve and the second oil tank. The sixteenth oil circuit is connected to the third two-position four-way solenoid reversing valve through the nineteenth oil circuit, and the first oil circuit is connected to the third two-position four-way solenoid reversing valve through the twenty-second oil circuit. The third two-position four-way solenoid reversing valve controls the connection or disconnection of the nineteenth oil circuit and the twenty-second oil circuit. A third one-way valve is provided on the nineteenth oil circuit to allow oil to flow from the sixteenth oil circuit into the nineteenth oil circuit, and to limit oil from the nineteenth oil circuit into the sixteenth oil circuit.

[0017] Beneficial effects:

[0018] The present invention improves the response time of the injection action through the dynamic valve, and makes the injection action stop more smoothly and at a more precise stop position through the overflow valve, thereby effectively solving the problem of generating a lot of noise and having a low action response. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic diagram of the present invention.

[0020] Figure numerals: 1-oil pump, 2-first oil tank, 3-third oil tank, 4-second oil tank, 5-injection cylinder, 6-first cavity, 7-second cavity, 8-accumulator, 9-first check valve, 10-dynamic valve, 11-first two-position four-way solenoid reversing valve, 12-first cartridge solenoid valve, 13-second cartridge solenoid valve, 14-overflow valve, 15-second check valve, 16-cartridge valve, 17-three-position four-way solenoid reversing valve, 18-proportional back pressure valve, 19-second two-position four-way solenoid reversing valve, 20-third two-position four-way solenoid reversing valve, 21-third check valve;

[0021] 100-main oil road, 101-first oil road, 102-second oil road, 103-third oil road, 104-fourth oil road, 105-fifth oil road, 106-sixth oil road, 107-seventh oil road, 108-eighth oil road, 109-ninth oil road, 110-tenth oil road, 111-eleventh oil road, 112-twelfth oil road, 113-thirteenth oil road, 114-fourteenth oil road, 115-fifteenth oil road, 116-sixteenth oil road, 117-seventeenth oil road, 118-eighteenth oil road, 119-nineteenth oil road, 120-twentieth oil road. DETAILED DESCRIPTION

[0022] 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.

[0023] The present invention proposes a high-speed packaging machine injection hydraulic oil circuit, such as Figure 1 As shown, it includes a glue injection cylinder 5 and an oil supply module, an energy storage module, a dynamic valve module and an oil return module. The technical solution of the present invention is described in detail below with the specific arrangement of each module:

[0024] The oil supply module includes an oil pump 1, a first oil tank 2 and an oil supply circuit. Figure 1As shown, the oil pump 1 is connected to the first oil tank 2, and the oil supply circuit includes a main oil circuit 100, a first oil circuit 101 and a second oil circuit 102. The main oil circuit 100 is connected to the oil pump 1, the first oil circuit 101 and the second oil circuit 102 are both connected to the main oil circuit 100, the first oil circuit 101 is connected to the energy storage module, and the second oil circuit 102 is connected to the dynamic valve module.

[0025] The oil pump 1 pumps oil from the first oil tank 2 and can input the oil into the energy storage module through the main oil circuit 100 and the first oil circuit 101 , or input the oil into the dynamic valve module through the main oil circuit 100 and the second oil circuit 102 .

[0026] The energy storage module includes an accumulator 8 and a first one-way valve 9. The first one-way valve 9 is arranged on the first oil circuit 101. The accumulator 8 is connected to the first one-way valve 9 through the third oil circuit 103. The accumulator 8 is connected to the dynamic valve module through the fourth oil circuit 104. The oil is input into the accumulator 8 through the first one-way valve 9 to keep the accumulator 8 at a certain pressure. Then the oil pump 1 stops, and the subsequent accumulator 8 can drive the dynamic valve module to open in advance. It is easy to understand that the oil can flow toward the accumulator 8 through the first one-way valve 9, but the oil in the accumulator 8 cannot pass through the first one-way valve 9.

[0027] The dynamic valve module includes a dynamic valve 10 and a first two-position four-way solenoid reversing valve 11. The fourth oil circuit 104 is connected to the first two-position four-way solenoid reversing valve 11. The first two-position four-way solenoid reversing valve 11 is connected to the control port of the dynamic valve 10 through the fifth oil circuit 105. The first oil inlet of the dynamic valve 10 is connected to the second oil circuit 102. The first oil outlet of the dynamic valve 10 is connected to the first cavity 6 of the injection cylinder 5 through the sixth oil circuit 106.

[0028] When injection is required, the oil pump 1 is started again. At the same time, the first two-position four-way electromagnetic reversing valve 11 connects the fourth oil circuit 104 with the fifth oil circuit 105, and the oil in the accumulator 8 enters the dynamic valve 10 through the control port, so that the second oil circuit 102 connected to the dynamic valve 10 is connected with the sixth oil circuit 106, so that the oil output by the oil pump 1 can enter the first cavity 6 of the injection cylinder 5, pushing the piston member to achieve injection. The oil in the accumulator 8 reaches the dynamic valve 10 in advance, and the second oil circuit 102 is connected with the sixth oil circuit 106 before the oil reaches the dynamic valve 10 through the second oil circuit 102, thereby reducing the noise generated before the oil enters the injection cylinder 5.

[0029] Furthermore, the dynamic valve module further includes a third oil tank 3, and the second oil outlet of the dynamic valve 10 is connected to the first two-position four-way electromagnetic reversing valve 11 through the seventh oil circuit 107, and the first two-position four-way electromagnetic reversing valve 11 is connected to the third oil tank 3 through the eighth oil circuit 108. Since the oil keeps entering the accumulator 8 during the injection process, and further the first two-position four-way electromagnetic reversing valve 11 continuously applies pressure to the dynamic valve 10, in order to reduce excessive pressure on the dynamic valve 10, after the oil enters the dynamic valve 10 to connect the second oil circuit 102 with the sixth oil circuit 106, the fourth oil circuit 104 is connected to the seventh oil circuit 107, and at the same time, the first two-position four-way electromagnetic reversing valve 11 connects the seventh oil circuit 107 with the eighth oil circuit 108, so that the excess oil input from the accumulator 8 to the dynamic valve 10 can be returned to the third oil tank 3 for recovery.

[0030] The oil return module is connected to the second cavity 7 of the injection cylinder 5, and includes a second oil tank 4, a first cartridge solenoid valve 12, a second cartridge solenoid valve 13, an overflow valve 14, a ninth oil circuit 109, a tenth oil circuit 110 and an eleventh oil circuit 111. The second cavity 7 of the injection cylinder 5 is connected to the ninth oil circuit 109, the ninth oil circuit 109 is connected to the tenth oil circuit 110, the tenth oil circuit 110 is connected to the second oil tank 4, the overflow valve 14 and the first cartridge solenoid valve 12 are arranged on the tenth oil circuit 110, wherein the first cartridge solenoid valve 12 is located between the overflow valve 14 and the second oil tank 4, the ninth oil circuit 109 is also connected to the eleventh oil circuit 111, the eleventh oil circuit 111 is connected to the second oil tank 4, and the second cartridge solenoid valve 13 is arranged on the eleventh oil circuit 111.

[0031] During the injection process, the first cartridge solenoid valve 12 and the second cartridge solenoid valve 13 are opened, and the oil in the second cavity 7 is discharged and enters the second oil tank 4 for recovery through the tenth oil path 110 and the eleventh oil path 111 respectively. The difference between the tenth oil path 110 and the eleventh oil path 111 is that the overflow valve 14 on the tenth oil path 110 generates pressure when the oil passes through, affecting the flow rate of the oil, while the eleventh oil path 111 is not affected by the overflow valve 14, and the flow rate of the oil in the eleventh oil path 111 is faster.

[0032] Combination Figure 1 , the direction of the piston moving to the right is the injection action. According to the above modules, the specific flow direction of the oil in the injection process of the present invention is as follows:

[0033] S1, pre-charge pressure of accumulator 8: the first two-position four-way electromagnetic reversing valve 11 disconnects the fourth oil circuit 104 from the fifth oil circuit 105, the oil pump 1 starts, and the oil enters the accumulator 8 through the first one-way valve 9. When the pressure in the accumulator 8 reaches the preset value, the oil pump 1 stops and the accumulator 8 maintains pressure.

[0034] S2, injection start: the first two-position four-way solenoid reversing valve 11 connects the fourth oil circuit 104 with the fifth oil circuit 105, and the seventh oil circuit 107 with the eighth oil circuit 108. The first cartridge solenoid valve 12 and the second cartridge solenoid valve 13 are opened to form passages for the tenth oil circuit 110 and the eleventh oil circuit 111, respectively, and the oil pump 1 is started. Since the oil pressure of the accumulator 8 is maintained in advance, this part of the oil reaches the dynamic valve 10 through the fourth oil circuit 104 and the fifth oil circuit 105, and the second oil circuit 102 is connected with the sixth oil circuit 106 in advance, so that the oil of the second oil circuit 102 can enter the first cavity 6 of the injection cylinder 5 through the sixth oil circuit 106, pushing the piston to move rightward, and the oil in the second cavity 7 enters the second oil tank 4 through the tenth oil circuit 110 and the eleventh oil circuit 111 for recovery;

[0035] At the same time, the oil pump 1 also continuously delivers oil to the accumulator 8 and the fourth oil circuit 104 during operation, and the excess oil enters the third oil tank 3 through the seventh oil circuit 107 and the eighth oil circuit 108 for recovery.

[0036] S3, injection deceleration: close the second plug-in solenoid valve 13, reduce the power of the oil pump 1, and pre-adjust the pressure by the relief valve 14. The oil in the second cavity 7 enters the second oil tank 4 only through the tenth oil path 110. In this process, the pressure generated by the relief valve 14 on the return oil side reacts to the injection cylinder 5 to offset the inertia of the piston moving to the right.

[0037] S4, injection stop: close the oil pump 1, and close the first two-position four-way electromagnetic reversing valve 11, the first cartridge electromagnetic valve 12 and the second cartridge electromagnetic valve 13, and the piston movement of the injection cylinder 5 stops.

[0038] Figure 1 The diagram shows an oil circuit diagram in which oil is input into the first cavity 6 through the oil pump 1 and the oil is discharged from the second cavity 7. When the injection cylinder 5 is reset, oil is input into the second cavity 7 and the oil is discharged from the first cavity 6. The figure does not show the oil circuit for inputting oil into the second cavity 7. It is easy to understand that the oil circuit for resetting the injection cylinder 5 is not the innovation of the present invention, and the present invention does not limit the oil supply structure and the oil supply circuit for resetting the injection cylinder 5.

[0039] Furthermore, a twelfth oil circuit 112 is provided between the ninth oil circuit 109 and the second oil tank 4 , and a second one-way valve 15 is provided on the twelfth oil circuit 112 , allowing the oil in the second oil tank 4 to flow into the second cavity 7 of the injection cylinder 5 , and restricting the oil in the second oil cylinder of the injection cylinder 5 from flowing into the second oil tank 4 through the twelfth oil circuit 112 .

[0040] The present invention also includes an oil return control module, which is connected to the sixth oil circuit 106 through the thirteenth oil circuit 113. Specifically, the oil return control module includes a three-position four-way solenoid reversing valve 17, a cartridge valve 16 and a second two-position four-way solenoid reversing valve 19. Figure 1 As shown, the liquid inlet of the cartridge valve 16 is connected to the sixth oil circuit 106 through the thirteenth oil circuit 113, the liquid outlet of the cartridge valve 16 is connected to the second oil tank 4 through the fourteenth oil circuit 114, the accumulator 8 is connected to the three-position four-way electromagnetic reversing valve 17 through the fifteenth oil circuit 115, a second two-position four-way electromagnetic reversing valve 19 is arranged on the fifteenth oil circuit 115, and the three-position four-way electromagnetic reversing valve 17 is connected to the control port of the cartridge valve 16 through the sixteenth oil circuit 116.

[0041] The working process of the oil return control module is: when the injection cylinder 5 is reset, the first cartridge solenoid valve 12 and the second cartridge solenoid valve 13 are closed, the first two-position four-way solenoid reversing valve 11 is closed to disconnect the accumulator 8 from the dynamic valve module, the second two-position four-way solenoid reversing valve 19 is opened to form a passage for the fifteenth oil path 115, the three-position four-way solenoid reversing valve 17 connects the fifteenth oil path 115 with the sixteenth oil path 116, the oil pump 1 is started, and the oil enters the cartridge valve 16 along the first oil path 101, the fifteenth oil path 115 and the sixteenth oil path 116, so that the cartridge valve 16 is opened, the thirteenth oil path 113 and the fourteenth oil path 114 are connected, the oil in the first cavity 6 is discharged, and flows into the second oil tank 4 along the sixth oil path 106, the thirteenth oil path 113 and the fourteenth oil path 114 to realize oil recovery.

[0042] It is easy to understand that during the injection process, the second two-position four-way electromagnetic reversing valve 19 disconnects the fifteenth oil circuit 115 to prevent the accumulator 8 from releasing pressure through the fifteenth oil circuit 115. Since the fifteenth oil circuit 115 is disconnected, the oil output by the oil pump 1 cannot drive the cartridge valve 16 to open, and the injection process proceeds normally.

[0043] Furthermore, the oil return control module also includes a proportional back pressure valve 18, and the three-position four-way solenoid reversing valve 17 is also connected to the fifteenth oil circuit 115 through the seventeenth oil circuit 117, and the three-position four-way solenoid reversing valve 17 is also connected to the fifteenth oil circuit 115 through the eighteenth oil circuit 118. The three-position four-way solenoid reversing valve 17 connects or disconnects the seventeenth oil circuit 117 and the eighteenth oil circuit 118, and the proportional back pressure valve 18 is arranged on the eighteenth oil circuit 118. Figure 1 As shown, when the injection cylinder 5 is reset, the seventeenth oil path 117 is connected to the eighteenth oil path 118, and part of the oil in the fifteenth oil path 115 flows to the proportional back pressure valve 18 through the seventeenth oil path 117 and the eighteenth oil path 118, and then enters the fifteenth oil path 115 and the sixteenth oil path 116 to enter the cartridge valve 16.

[0044] Furthermore, the eleven oil circuit 111 is also provided with a third two-position four-way solenoid reversing valve 20, and the third two-position four-way solenoid reversing valve 20 is located between the second plug-in solenoid valve 13 and the second oil tank 4. The sixteen oil circuit 116 is connected to the third two-position four-way solenoid reversing valve 20 through the nineteen oil circuit 119, and the first oil circuit 101 is connected to the third two-position four-way solenoid reversing valve 20 through the twenty oil circuit 120. The third two-position four-way solenoid reversing valve 20 controls the connection or disconnection between the nineteen oil circuit 119 and the twenty oil circuit 120. A third one-way valve 21 is provided on the nineteen oil circuit 119 to allow oil to flow from the sixteen oil circuit 116 into the nineteen oil circuit 119, and to restrict oil from flowing from the nineteen oil circuit 119 into the sixteen oil circuit 116. It is easy to understand that during the injection process, the nineteen oil circuits 119 and the twenty oil circuits 120 are disconnected; when the injection cylinder 5 is reset, the nineteen oil circuits 119 and the twenty oil circuits 120 are connected. Due to the existence of the third one-way valve 21, the oil output by the oil pump 1 will not flow into the nineteen oil circuits 119, and the excess oil that controls the opening of the cartridge valve 16 can be discharged through the nineteen oil circuits 119 to prevent excessive pressure at the control port of the cartridge valve 16.

[0045] 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 high-speed packaging machine injection hydraulic oil circuit, characterized in that: It comprises a glue injection oil cylinder (5) and an oil supply module, an energy storage module, a dynamic valve module and an oil return module; The oil supply module comprises an oil pump (1), a first oil tank (2) and an oil supply oil circuit, the oil pump (1) is connected to the first oil tank (2), the oil supply oil circuit comprises a main oil circuit (100), a first oil circuit (101) and a second oil circuit (102), the main oil circuit (100) is connected to the oil pump (1), and the first oil circuit (101) and the second oil circuit (102) are both connected to the main oil circuit (100); The energy storage module comprises an accumulator (8) and a first one-way valve (9), wherein the first one-way valve (9) is arranged on a first oil circuit (101), and the accumulator (8) is connected to the first one-way valve (9) via a third oil circuit (103); The dynamic valve module comprises a dynamic valve (10) and a first two-position four-way electromagnetic reversing valve (11); the accumulator (8) is connected to the first two-position four-way electromagnetic reversing valve (11) via a fourth oil circuit (104); the first two-position four-way electromagnetic reversing valve (11) is connected to a control port of the dynamic valve (10) via a fifth oil circuit (105); the first oil inlet of the dynamic valve (10) is connected to the second oil circuit (102); and the first oil outlet of the dynamic valve (10) is connected to a first cavity (6) of the injection cylinder (5) via a sixth oil circuit (106); The oil return module is connected to the second cavity (7) of the injection cylinder (5).

2. The high-speed packaging machine injection hydraulic oil circuit according to claim 1 is characterized in that: The oil return module comprises a second oil tank (4), a first plug-in solenoid valve (12), a relief valve (14), a ninth oil circuit (109) and a tenth oil circuit (110); the second cavity (7) of the injection cylinder (5) is connected to the ninth oil circuit (109), the ninth oil circuit (109) is connected to the tenth oil circuit (110), the tenth oil circuit (110) is connected to the second oil tank (4), the relief valve (14) and the first plug-in solenoid valve (12) are arranged on the tenth oil circuit (110), wherein the first plug-in solenoid valve (12) is located between the relief valve (14) and the second oil tank (4).

3. The high-speed packaging machine injection hydraulic oil circuit according to claim 1 is characterized in that: The oil return module further comprises a second plug-in solenoid valve (13) and an eleventh oil circuit (111); the ninth oil circuit (109) is also connected to the eleventh oil circuit (111); the eleventh oil circuit (111) is connected to the second oil tank (4); and the second plug-in solenoid valve (13) is arranged on the eleventh oil circuit (111).

4. The high-speed packaging machine injection hydraulic oil circuit according to claim 1 is characterized in that: The dynamic valve module also includes a third oil tank (3); the second oil outlet of the dynamic valve (10) is connected to a first two-position four-way electromagnetic reversing valve (11) via a seventh oil circuit (107); and the first two-position four-way electromagnetic reversing valve (11) is connected to the third oil tank (3) via an eighth oil circuit (108).

5. The high-speed packaging machine injection hydraulic oil circuit according to claim 1 is characterized in that: A twelfth oil passage (112) is also provided between the ninth oil passage (109) and the second oil tank (4). A second one-way valve (15) is provided on the twelfth oil passage (112) to allow the oil in the second oil tank (4) to flow into the second cavity (7) of the injection cylinder (5) and to restrict the oil in the second oil cylinder of the injection cylinder (5) from flowing into the second oil tank (4) through the twelfth oil passage (112).

6. The high-speed packaging machine injection hydraulic oil circuit according to claim 1 is characterized in that: The invention also comprises an oil return control module, the oil return control module comprising a three-position four-way electromagnetic reversing valve (17), a cartridge valve (16) and a second two-position four-way electromagnetic reversing valve (19), the liquid inlet of the cartridge valve (16) being connected to the sixth oil circuit (106) via a thirteenth oil circuit (113), the liquid outlet of the cartridge valve (16) being connected to the second oil tank (4) via a fourteenth oil circuit (114), the accumulator (8) being connected to the three-position four-way electromagnetic reversing valve (17) via a fifteenth oil circuit (115), the second two-position four-way electromagnetic reversing valve (19) being arranged on the fifteenth oil circuit (115), and the three-position four-way electromagnetic reversing valve (17) being connected to the control port of the cartridge valve (16) via a sixteenth oil circuit (116).

7. The high-speed packaging machine injection hydraulic oil circuit according to claim 6 is characterized in that: The oil return control module further comprises a proportional back pressure valve (18); the three-position four-way electromagnetic reversing valve (17) is also connected to the fifteenth oil circuit (115) via the seventeenth oil circuit (117); the three-position four-way electromagnetic reversing valve (17) is also connected to the fifteenth oil circuit (115) via the eighteenth oil circuit (118); the three-position four-way electromagnetic reversing valve (17) connects or disconnects the seventeenth oil circuit (117) and the eighteenth oil circuit (118); and the proportional back pressure valve (18) is arranged on the eighteenth oil circuit (118).

8. The high-speed packaging machine injection hydraulic oil circuit according to claim 3 is characterized in that: The eleventh oil circuit (111) is also provided with a third two-position four-way electromagnetic reversing valve (20), which is located between the second plug-in electromagnetic valve (13) and the second oil tank (4); the sixteenth oil circuit (116) is connected to the third two-position four-way electromagnetic reversing valve (20) through the nineteenth oil circuit (119); the first oil circuit (101) is connected to the third two-position four-way electromagnetic reversing valve (20) through the twentieth oil circuit (120); the third two-position four-way electromagnetic reversing valve (20) controls the connection or disconnection between the nineteenth oil circuit (119) and the twentyth oil circuit (120); the nineteenth oil circuit (119) is provided with a third one-way valve (21), which allows oil to flow from the sixteenth oil circuit (116) into the nineteenth oil circuit (119), and restricts oil from the nineteenth oil circuit (119) from flowing into the sixteenth oil circuit (116).

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