Two-plate machine mode locking system and two-plate machine control method

Abstract

The invention belongs to the technical field of injection molding, and discloses a two-plate machine mold locking system and a two-plate machine control method. According to the two-plate machine mold locking system, a first reversing control valve can selectively communicate a mold locking cavity with the output end of an oil pumping assembly and communicate a mold breaking cavity with an oil tank; or the mold locking cavity is communicated with the oil tank, and the mold breaking cavity is communicated with the output end of the oil pumping assembly. Or, the mold locking cavity is closed, and the mold breaking cavity is communicated with the oil tank. The input end of the proportional overflow valve communicates with the input end of the first on-off valve, and the input end of the proportional overflow valve and the input end of the first on-off valve communicate with the mold locking cavity. And the output ends of the plurality of first on-off valves are communicated. The output ends of the first on-off valves communicate with the input end of the second on-off valve. And the first on-off valve can selectively connect and disconnect the mold locking cavity and the second on-off valve. And the quality stability of the finally obtained product can be effectively improved, and the universality of the two-plate machine mold locking system can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to a two-platen machine clamping system and a two-platen machine control method. Background Art

[0002] The two-platen machine is usually composed of a mold, a plasticizing injection system, a clamping system, etc. Among them, the function of the plasticizing injection system is to heat and plasticize a certain amount of material within a specified time, and then inject the molten material into the mold cavity through a screw at a certain pressure and speed. After the injection is completed, the mold maintains the shape of the molten material injected into the mold cavity. The function of the clamping system is to ensure the closing, opening and ejection of the mold; after the mold is closed, sufficient clamping force is applied to the mold to resist the cavity pressure generated by the molten material entering the cavity, to prevent the mold from opening and affecting the quality of the finished product.

[0003] For the mold locking system, the prior art usually sets a plurality of first electromagnetic reversing valves corresponding to a plurality of mold locking cylinders, and controls the oil pump and the on-off of a corresponding mold locking cylinder through the first electromagnetic reversing valve, so that hydraulic oil can be delivered to the mold locking cavity of each mold locking cylinder for mold locking; and sets one or more second electromagnetic reversing valves to control the mold breaking cavity and the oil tank of the mold locking cylinder, so that the hydraulic oil in each mold breaking cavity can flow back to the oil tank. Although the effects of mold locking and demolding can be achieved, it is impossible to ensure that the mold locking force provided by the plurality of mold locking cylinders remains consistent, resulting in unstable quality of the final product; secondly, it is also impossible to adjust the mold locking force provided by the plurality of mold locking cylinders according to special needs, resulting in poor versatility. Summary of the invention

[0004] The object of the present invention is to provide a two-platen mold locking system and a two-platen machine control method, which can effectively improve the quality stability of the final product and can effectively improve the versatility of the two-platen mold locking system.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The two-platen clamping system comprises an oil tank, an oil pump assembly and a plurality of clamping assemblies distributed in parallel; the input end of the oil pump assembly is connected to the oil tank; the clamping assembly comprises a clamping oil cylinder, the clamping oil cylinder comprises a cylinder body and a piston rod slidably arranged on the cylinder body, the piston rod divides the cylinder body into a clamping cavity and a demolding cavity; the piston rod is connected to a movable platen and can drive the movable platen to move; the clamping assembly also comprises:

[0007] a first reversing control valve, which can selectively connect the mold locking cavity with the output end of the oil pump assembly and connect the mold breaking cavity with the oil tank; or connect the mold locking cavity with the oil tank and connect the mold breaking cavity with the output end of the oil pump assembly; or close the mold locking cavity and connect the mold breaking cavity with the oil tank;

[0008] A proportional relief valve and a first on-off valve, wherein the input end of the proportional relief valve is connected to the input end of the first on-off valve, and the input end of the proportional relief valve and the input end of the first on-off valve are both connected to the clamping cavity; the output ends of the plurality of first on-off valves are all connected;

[0009] The two-platen clamping system further comprises a second on-off valve, and the output ends of the plurality of the first on-off valves are all connected to the input end of the second on-off valve; the first on-off valve can selectively open and close the clamping cavity and the second on-off valve.

[0010] As a preferred solution of the above-mentioned two-platen clamping system, the first reversing control valve is a three-position four-way electromagnetic reversing valve, the oil inlet P1 of the first reversing control valve is connected to the output end of the oil pump assembly, the communication port A1 of the first reversing control valve is connected to the clamping cavity, the communication port B1 of the first reversing control valve is connected to the mold breaking cavity, and the oil return port T1 of the first reversing control valve is connected to the oil tank;

[0011] When the left station of the first reversing control valve is energized, the oil inlet P1 is connected to the connecting port B1, and the connecting port A1 is connected to the oil return port T1; when the right station of the first reversing control valve is energized, the oil inlet P1 is connected to the connecting port A1, and the connecting port B1 is connected to the oil return port T1; when the first reversing control valve is de-energized, the oil inlet P1 and the connecting port A1 are both blocked, and the connecting port B1 is connected to the oil return port T1.

[0012] As a preferred solution of the above-mentioned two-platen clamping system, the clamping assembly also includes a hydraulically controlled one-way valve, which is arranged on a pipeline connecting the connecting port A1 and the clamping cavity, and a pilot oil port of the hydraulically controlled one-way valve is connected to a pipeline connecting the connecting port B1 and the demolding cavity.

[0013] As a preferred solution of the above two-platen mold locking system, the two-platen mold locking system further includes an energy recovery component, and the energy recovery component includes:

[0014] An energy recovery bottle, wherein the output ends of the plurality of proportional relief valves are all connected to the input end of the energy recovery bottle;

[0015] The second reversing control valve, the second on-off valve can selectively open and close the second reversing control valve and multiple first on-off valves; the second reversing control valve can selectively connect the second on-off valve with the oil tank, or connect the second on-off valve with the energy recovery bottle.

[0016] As a preferred solution of the above-mentioned two-platen clamping system, a first mechanical one-way valve is provided on the pipeline connecting the second reversing control valve and the energy recovery bottle, and the first mechanical one-way valve can guide the hydraulic oil from the second reversing control valve to the energy recovery bottle.

[0017] As a preferred solution of the above-mentioned two-platen clamping system, the energy recovery component also includes a third on-off valve, which can selectively open and close the energy recovery bottle and the input end of the first reversing control valve; when the energy recovery bottle and the input end of the first reversing control valve are connected, the third on-off valve can make the hydraulic oil flowing out of the energy recovery bottle flow unidirectionally to the input end of the first reversing control valve.

[0018] As a preferred solution of the above two-platen mold locking system, the two-platen mold locking system further includes an exhaust valve and a second mechanical one-way valve, and the mold locking cavity, the exhaust valve, the second mechanical one-way valve and the oil tank are connected in sequence.

[0019] A two-platen machine control method is used to be implemented in the above-mentioned two-platen machine clamping system, and the two-platen machine control method includes:

[0020] When the clamping forces of the multiple clamping cylinders need to be adjusted to be the same, the first reversing control valve is controlled to connect the clamping cavity with the output end of the oil pump assembly, and the demolding cavity with the oil tank; at the same time, the overload pressures of the multiple proportional relief valves are controlled to be the same; at the same time, the multiple first on-off valves are controlled to connect the corresponding clamping cavities with the second on-off valves; at the same time, the second on-off valves are controlled to be in the disconnected state; and then the oil pump assembly is controlled to supply oil to the clamping cavity.

[0021] As a preferred solution of the above two-trigger control method, the two-trigger control method further includes:

[0022] When the clamping forces of the multiple clamping cylinders need to be adjusted to be at least partially different, the first reversing control valve is controlled to connect the clamping cavity with the output end of the oil pump assembly, and the mold breaking cavity with the oil tank; at the same time, the overload pressures of the multiple proportional relief valves are controlled to be at least partially different; at the same time, the multiple first on-off valves are controlled to disconnect the corresponding clamping cavity from the second on-off valve; and then the oil pump assembly is controlled to supply oil to the clamping cavity.

[0023] As a preferred solution of the above two-platen machine control method, the two-platen machine clamping system further includes an energy recovery bottle and a second reversing control valve; the second on-off valve can selectively open and close the second reversing control valve and a plurality of the first on-off valves; the second reversing control valve can selectively connect the second on-off valve to the oil tank, or connect the second on-off valve to the energy recovery bottle; the two-platen machine control method further includes:

[0024] When the clamping cavity leaks oil, the second reversing control valve is controlled to connect the second on-off valve with the energy recovery bottle; the second on-off valve is controlled to connect the second reversing control valve with multiple first on-off valves; multiple first on-off valves are controlled to connect the corresponding clamping cavity with the second on-off valve;

[0025] When the chamber pressure of the clamping cavity is less than or equal to the bottle mouth pressure of the energy recovery bottle, the second reversing control valve is controlled to connect the second on-off valve with the oil tank.

[0026] Beneficial effects of the present invention:

[0027] The present invention provides a two-platen mold locking system and a two-platen control method. The two-platen mold locking system includes an oil tank, an oil pump assembly, and a plurality of mold locking assemblies distributed in parallel. The input end of the oil pump assembly is connected to the oil tank. The mold locking assembly includes a mold locking cylinder, which includes a cylinder body and a piston rod slidably arranged on the cylinder body, and the piston rod divides the cylinder body into a mold locking cavity and a mold breaking cavity; the piston rod is connected to a movable template and can drive the movable template to move. The mold locking assembly also includes a first reversing control valve, a proportional relief valve, and a first on-off valve. The first reversing control valve can selectively connect the mold locking cavity with the output end of the oil pump assembly, and connect the mold breaking cavity with the oil tank; or; connect the mold locking cavity with the oil tank, and connect the mold breaking cavity with the output end of the oil pump assembly; or; close the mold locking cavity, and connect the mold breaking cavity with the oil tank. The input end of the proportional relief valve is connected to the input end of the first on-off valve, and the input end of the proportional relief valve and the input end of the first on-off valve are both connected to the mold locking cavity. The output ends of the plurality of first on-off valves are all connected. The two-platen mold clamping system also includes a second on-off valve. The output ends of the plurality of first on-off valves are all connected to the input end of the second on-off valve. The first on-off valve can selectively open and close the mold clamping cavity and the second on-off valve.

[0028] When the clamping forces of multiple clamping cylinders are to be adjusted to be the same, the first reversing control valve is controlled to connect the clamping cavity with the output end of the pump oil assembly, and the mold breaking cavity is connected with the oil tank, and the pump oil assembly supplies oil to the clamping cavity to push the movable template to move and close the mold with the fixed template to form a mold cavity. At the same time, multiple first on-off valves are controlled to connect the corresponding clamping cavities with the second on-off valve, and the second on-off valve is controlled to be in the off state, so that multiple clamping cavities are connected in series. At the same time, the overload pressures of multiple proportional relief valves are controlled to be the same. As hydraulic oil is injected into each clamping cavity, the final clamping force of multiple clamping cavities can be adjusted to be consistent. This can effectively improve the quality stability of the final product.

[0029] When the clamping forces of multiple clamping cylinders need to be adjusted to be at least partially different, the first reversing control valve is controlled to connect the clamping cavity with the oil pump assembly, and the mold breaking cavity with the oil tank, and the oil pump assembly pumps oil into the clamping cavity to push the movable template to move and close the mold with the fixed template to form a mold cavity. At the same time, multiple first on-off valves are controlled to disconnect the corresponding clamping cavities from the second on-off valves, so that the multiple clamping cavities are independent of each other and do not interfere with each other. At the same time, the overload pressures of multiple proportional relief valves are controlled to be at least partially different. As the hydraulic oil is injected into each clamping cavity, the final clamping forces of multiple clamping cavities can be adjusted to be at least partially different. This can effectively improve the versatility of the two-platen clamping system.

[0030] When the clamping forces of multiple clamping cylinders are adjusted to reach the expected value, the first reversing control valve is controlled to close the clamping cavity and connect the mold breaking cavity with the oil tank, so that the clamping forces of each clamping cylinder can be kept constant and the hydraulic oil in the mold breaking cavity can flow back to the oil tank.

[0031] When the movable template needs to be adjusted away from the fixed template, that is, when demolding is required, the first reversing control valve is controlled to connect the locking cavity with the oil tank, and connect the demolding cavity with the output end of the oil pumping assembly. The oil pumping assembly pumps oil into the demolding cavity to push the movable template to move away from the fixed template, so that the product can be demolded.

[0032] Therefore, by adopting the two-platen mold locking system, the quality stability of the final product can be effectively improved, and the versatility of the two-platen mold locking system can be effectively improved.

[0033] The present invention also provides a two-platen machine control method for implementing the above-mentioned two-platen machine clamping system. By adopting the two-platen machine control method to control the above-mentioned two-platen machine clamping system, the quality stability of the final product can be effectively improved, and the versatility of the two-platen machine clamping system can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of a two-platen clamping system provided by a specific embodiment of the present invention;

[0035] Figure 2 It is a partial schematic diagram of the oil pump assembly and oil tank of the two-platen clamping system provided by a specific embodiment of the present invention;

[0036] Figure 3 The process of the two-platen control method provided by the specific embodiment of the present invention is Figure 1 ;

[0037] Figure 4 The process of the two-platen control method provided by the specific embodiment of the present invention is Figure 2 .

[0038] In the figure:

[0039] 1. Fuel tank;

[0040] 2. Pump oil assembly; 21. Oil pump; 22. Pilot check valve; 231. Pilot cartridge valve; 232. Overflow valve body; 24. Filter; 25. Second throttle valve; 26. Third throttle valve; 27. Third pressure sensor; 28. Second pressure gauge;

[0041] 3. Clamping assembly; 31. Clamping cylinder; 311. Piston rod; 312. Clamping cavity; 313. Demolding cavity; 32. First reversing control valve; 33. Proportional relief valve; 34. First on-off valve; 35. Hydraulic control one-way valve; 36. Exhaust valve; 37. Second mechanical one-way valve; 38. Second pressure sensor; 39. Electronic ruler;

[0042] 41. Energy recovery bottle; 42. Second reversing control valve; 43. First mechanical one-way valve; 44. Third on-off valve; 45. First throttle valve; 46. First pressure sensor; 47. First pressure gauge;

[0043] 5. The second on-off valve. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] For the mold locking system, the prior art usually sets a plurality of first electromagnetic reversing valves corresponding to a plurality of mold locking cylinders, and controls the oil pump and the on-off of a corresponding mold locking cylinder through the first electromagnetic reversing valve, so that hydraulic oil can be delivered to the mold locking cavity of each mold locking cylinder for mold locking; and sets one or more second electromagnetic reversing valves to control the mold breaking cavity and the oil tank of the mold locking cylinder, so that the hydraulic oil in each mold breaking cavity can flow back to the oil tank. Although the effects of mold locking and demolding can be achieved, it is impossible to ensure that the mold locking force provided by the plurality of mold locking cylinders remains consistent, resulting in unstable quality of the final product; secondly, it is also impossible to adjust the mold locking force provided by the plurality of mold locking cylinders according to special needs, resulting in poor versatility.

[0049] Figure 1 It is the schematic diagram of the two-platen clamping system. Figure 2 It is a partial schematic diagram of the oil pump assembly and oil tank formed by the two-platen clamping system. Figure 3 This is the process of the two-plate control method Figure 1 . Figure 4 This is the process of the two-plate control method Figure 2 .

[0050] like Figure 1As shown, the present invention provides a two-platen mold locking system, which includes an oil tank 1, an oil pump assembly 2 and a plurality of parallel-distributed mold locking assemblies 3. Among them, the input end of the oil pump assembly 2 is connected to the oil tank 1. The mold locking assembly 3 includes a mold locking cylinder 31, which includes a cylinder body and a piston rod 311 slidably arranged on the cylinder body, and the piston rod 311 divides the cylinder body into a mold locking cavity 312 and a mold breaking cavity 313; the piston rod 311 is connected to the movable mold plate and can drive the movable mold plate to move. The mold locking assembly 3 also includes a first reversing control valve 32, a proportional relief valve 33 and a first on-off valve 34. The first reversing control valve 32 can selectively connect the mold locking cavity 312 with the output end of the oil pump assembly 2, and connect the mold breaking cavity 313 with the oil tank 1; or; connect the mold locking cavity 312 with the oil tank 1, and connect the mold breaking cavity 313 with the output end of the oil pump assembly 2; or; close the mold locking cavity 312 and connect the mold breaking cavity 313 with the oil tank 1. The input end of the proportional relief valve 33 is connected to the input end of the first on-off valve 34, and the input end of the proportional relief valve 33 and the input end of the first on-off valve 34 are both connected to the mold locking cavity 312. The output ends of multiple first on-off valves 34 are all connected. The two-plate machine mold locking system also includes a second on-off valve 5. The output ends of multiple first on-off valves 34 are all connected to the input end of the second on-off valve 5. The first on-off valve 34 can selectively open and close the mold locking cavity 312 and the second on-off valve 5.

[0051] When the clamping forces of multiple clamping cylinders 31 are to be adjusted to be the same, the first reversing control valve 32 is controlled to connect the clamping cavity 312 with the output end of the pump oil assembly 2, and the mold breaking cavity 313 is connected with the oil tank 1, and the pump oil assembly 2 supplies oil to the clamping cavity 312 to push the movable template to move and close the mold with the fixed template to form a mold cavity. At the same time, the multiple first on-off valves 34 are controlled to connect the corresponding clamping cavity 312 with the second on-off valve 5, and the second on-off valve 5 is controlled to be in the disconnected state, so that the multiple clamping cavities 312 are connected in series. At the same time, the overload pressures of multiple proportional relief valves 33 are controlled to be the same. As the hydraulic oil is injected into each clamping cavity 312, the final clamping force of the multiple clamping cavities 312 can be adjusted to be consistent. This can effectively improve the quality stability of the final product.

[0052] When the clamping forces of multiple clamping cylinders 31 need to be adjusted to be at least partially different, the first reversing control valve 32 is controlled to connect the clamping cavity 312 with the oil pumping assembly 2, and the mold breaking cavity 313 with the oil tank 1, and the oil pumping assembly 2 pumps oil into the clamping cavity 312 to push the movable mold plate to move and close the mold with the fixed mold plate to form a mold cavity. At the same time, the multiple first on-off valves 34 are controlled to disconnect the corresponding clamping cavity 312 from the second on-off valve 5, so that the multiple clamping cavities 312 are independent of each other and do not interfere with each other. At the same time, the overload pressures of multiple proportional relief valves 33 are controlled to be at least partially different. As the hydraulic oil is injected into each clamping cavity 312, the final clamping forces of the multiple clamping cavities 312 can be adjusted to be at least partially different. Thereby, the versatility of the two-platen clamping system can be effectively improved.

[0053] When the clamping forces of the multiple clamping cylinders 31 are adjusted to reach the expected values, the first reversing control valve 32 is controlled to close the clamping cavity 312 and connect the mold breaking cavity 313 with the oil tank 1. This allows the clamping forces of the various clamping cylinders 31 to remain unchanged, and the hydraulic oil in the mold breaking cavity 313 can flow back into the oil tank 1.

[0054] When the movable template needs to be adjusted away from the fixed template, that is, when demolding is required, the first reversing control valve 32 is controlled to connect the locking cavity 312 with the oil tank 1, and connect the demolding cavity 313 with the output end of the oil pumping assembly 2. The oil pumping assembly 2 pumps oil into the demolding cavity 313 to push the movable template to move away from the fixed template, so that the product can be demolded.

[0055] Therefore, by adopting the two-platen mold locking system, the quality stability of the final product can be effectively improved, and the versatility of the two-platen mold locking system can be effectively improved.

[0056] Specifically, in this embodiment, Figure 1 As shown, the exemplary number of the clamping assemblies 3 is four. It is understandable that the number of the clamping assemblies 3 can also be adaptively increased or decreased according to actual working conditions.

[0057] Specifically, in this embodiment, Figure 1As shown, the first reversing control valve 32 is a three-position four-way electromagnetic reversing valve, the oil inlet P1 of the first reversing control valve 32 is connected to the output end of the oil pump assembly 2, the connecting port A1 of the first reversing control valve 32 is connected to the clamping cavity 312, the connecting port B1 of the first reversing control valve 32 is connected to the mold breaking cavity 313, and the oil return port T1 of the first reversing control valve 32 is connected to the oil tank 1. When the left station of the first reversing control valve 32 is powered, the oil inlet P1 is connected to the connecting port B1, and the connecting port A1 is connected to the oil return port T1. When the right station of the first reversing control valve 32 is powered, the oil inlet P1 is connected to the connecting port A1, and the connecting port B1 is connected to the oil return port T1. When the first reversing control valve 32 is powered off, the oil inlet P1 and the connecting port A1 are both blocked, and the connecting port B1 is connected to the oil return port T1. Specifically, when the left station of the first reversing control valve 32 is powered, the mold locking cavity 312 is connected to the oil tank 1, and the mold breaking cavity 313 is connected to the output end of the oil pump assembly 2. When the right station of the first reversing control valve 32 is powered, the mold locking cavity 312 is connected to the output end of the oil pump assembly 2, and the mold breaking cavity 313 is connected to the oil tank 1. When the first reversing control valve 32 is powered off, the mold locking cavity 312 is closed, and the mold breaking cavity 313 is connected to the oil tank 1.

[0058] Specifically, in this embodiment, when the first on-off valve 34 is powered, the first on-off valve 34 is in a disconnected state. The first on-off valve 34 disconnects the mold-breaking cavity 313 from the second on-off valve 5. When the first on-off valve 34 is powered off, the first on-off valve 34 is in a connected state. The first on-off valve 34 connects the mold-breaking cavity 313 with the second on-off valve 5.

[0059] Preferably, if Figure 1 As shown, the mold locking assembly 3 further includes a hydraulically controlled one-way valve 35, which is arranged on the pipeline connecting the connecting port A1 and the mold locking cavity 312, and the pilot oil port of the hydraulically controlled one-way valve 35 is connected to the pipeline connecting the connecting port B1 and the mold breaking cavity 313. With such arrangement, when the mold locking forces of the multiple mold locking cylinders 31 all reach the expected value, the first reversing control valve 32 is controlled to be powered off to close the mold locking cavity 312, and the mold breaking cavity 313 is connected to the oil tank 1, the hydraulically controlled one-way valve 35 can further ensure that the mold locking force of the mold locking cavity 312 remains unchanged, thereby further improving the quality stability of the obtained product. When demolding is to be performed, the left station of the first reversing control valve 32 is energized, and the oil pumping assembly 2 pumps oil into the demolding cavity 313. A part of the hydraulic oil flowing from the connecting port B1 to the demolding cavity 313 flows from the pilot oil port to the hydraulically controlled one-way valve 35, so that the hydraulically controlled one-way valve 35 connects the locking cavity 312 and the connecting port A1, so that the hydraulic oil in the locking cavity 312 can flow back to the oil tank 1 normally to achieve demolding.

[0060] Specifically, in the process of adjusting the clamping forces of multiple clamping cylinders 31 to be the same, the output ends of multiple proportional relief valves 33 can be connected to the oil tank 1, or the output ends of multiple proportional relief valves 33 can be connected to the energy recovery component. In the process of adjusting the clamping forces of multiple clamping cylinders 31 to be at least partially different, the output ends of multiple proportional relief valves 33 can be adjusted to be connected to the oil tank 1, or the output ends of multiple proportional relief valves 33 can be connected to the energy recovery component. In the process of draining oil from the clamping cavity 312, the clamping cavity 312 can be connected to the oil tank 1, or the clamping cavity 312 can be connected to the energy recovery component.

[0061] In this embodiment, it is preferred that when the clamping forces of the multiple clamping cylinders 31 are adjusted to be the same, the output ends of the multiple proportional relief valves 33 are all connected to the energy recovery component. When the clamping forces of the multiple clamping cylinders 31 are adjusted to be at least partially different, the output ends of the multiple proportional relief valves 33 are all connected to the energy recovery component. When the clamping cavity 312 is drained, the clamping cavity 312 is connected to the energy recovery component.

[0062] Specifically, Figure 1 As shown, the energy recovery component includes an energy recovery bottle 41 and a second reversing control valve 42. The output ends of the plurality of proportional relief valves 33 are all connected to the input end of the energy recovery bottle 41. The second on-off valve 5 can selectively open and close the second reversing control valve 42 and the plurality of first on-off valves 34. The second reversing control valve 42 can selectively connect the second on-off valve 5 to the oil tank 1, or connect the second on-off valve 5 to the energy recovery bottle 41.

[0063] Such arrangement enables, in the process of adjusting the clamping forces of multiple clamping cylinders 31 to be the same, and in the process of adjusting the clamping forces of multiple clamping cylinders 31 to be at least partially different, the hydraulic oil with a certain pressure flowing out of the proportional relief valve 33 can all flow to the energy recovery bottle 41, so that the energy recovery bottle 41 recovers energy. Secondly, when the clamping cavity 312 is leaking oil, the second reversing control valve 42 is controlled to connect the second on-off valve 5 with the energy recovery bottle 41, the second on-off valve 5 is controlled to connect the second reversing control valve 42 with multiple first on-off valves 34, and the multiple first on-off valves 34 are controlled to connect the corresponding mold breaking cavity 313 and the second on-off valve 5, so that the hydraulic oil with a certain pressure in each clamping cavity 312 can all flow to the energy recovery bottle 41, so that the energy recovery bottle 41 recovers energy.

[0064] Specifically, in this embodiment, the second reversing control valve 42 is a two-position four-way electromagnetic reversing valve, the oil inlet P2 of the second reversing control valve 42 is connected to the output end of the second on-off valve 5, the connecting port A2 of the second reversing control valve 42 is blocked, the connecting port B2 of the second reversing control valve 42 is connected to the energy recovery bottle 41, and the oil return port T2 of the second reversing control valve 42 is connected to the oil tank 1. When the second reversing control valve 42 is powered on, the oil inlet P2 is connected to the connecting port B2, and the connecting port A2 is connected to the oil return port T2. When the second reversing control valve 42 is powered off, the oil inlet P2 is connected to the connecting port A2, and the connecting port B2 is connected to the oil return port T2. Specifically, when the second reversing control valve 42 is powered on, the second reversing control valve 42 connects the second on-off valve 5 to the energy recovery bottle 41. When the second reversing control valve 42 is powered off, the second reversing control valve 42 connects the second on-off valve 5 to the oil tank 1.

[0065] Specifically, in this embodiment, when the second on-off valve 5 is powered, the second on-off valve 5 is in an off state. The second on-off valve 5 disconnects the first on-off valve 34 and the second switching control valve 42. When the second on-off valve 5 is powered off, the second on-off valve 5 is in a connected state. The second on-off valve 5 connects the first on-off valve 34 and the second switching control valve 42.

[0066] Such an arrangement enables that when the clamping cavity 312 leaks oil, the multiple first on-off valves 34 are all powered off, so that each clamping cavity 312 is connected to the second on-off valve 5, and the second on-off valve 5 is powered off so that the second on-off valve 5 is in a connected state. The clamping cavity 312 can leak oil, and the energy recovery bottle 41 recovers energy, and energy consumption caused by oil leakage can be avoided.

[0067] This arrangement ensures that even if the two-platen mold locking system loses power due to a fault, the pressure oil in the mold locking cavity 312 and the mold breaking cavity 313 can flow back into the oil tank 1, thereby improving the safety of the two-platen mold locking system.

[0068] Specifically, in this embodiment, Figure 1 As shown, a first throttle valve 45 is provided on the pipeline connecting the oil return port T2 and the oil tank 1. With such a configuration, the hydraulic oil from the clamping cavity 312 returning to the oil tank 1 can effectively avoid the impact caused by pressure relief under the action of the first throttle valve 45, thereby further improving the safety of the two-platen clamping system.

[0069] Furthermore, if Figure 1As shown, the energy recovery component also includes a third on-off valve 44, which can selectively open and close the energy recovery bottle 41 and the input end of the first reversing control valve 32. When the energy recovery bottle 41 is connected to the input end of the first reversing control valve 32, the third on-off valve 44 can make the hydraulic oil flowing out of the energy recovery bottle 41 flow to the input end of the first reversing control valve 32 in one direction. Specifically, in the process of adjusting the clamping forces of multiple clamping cylinders 31 to be the same, in the process of adjusting the clamping forces of multiple clamping cylinders 31 to be at least partially different, and in the process of oil leakage from the clamping cavity 312, the third on-off valve 44 is controlled to disconnect the energy recovery bottle 41 and the input end of the first reversing control valve 32, so as to ensure that the energy recovery bottle 41 can effectively recover energy, and can also effectively prevent the hydraulic oil from flowing back to the clamping cavity 312 or the mold breaking cavity 313 again. Secondly, by setting the third on-off valve 44, when the pumping oil assembly 2 pumps oil, it is judged in real time whether the pumping oil pressure of the pumping oil assembly 2 is less than the bottle mouth pressure of the energy recovery bottle 41; if the pumping oil pressure of the pumping oil assembly 2 is less than the bottle mouth pressure of the energy recovery bottle 41, the third on-off valve 44 is controlled to connect the energy recovery bottle 41 with the input end of the first reversing control valve 32; if the pumping oil pressure of the pumping oil assembly 2 is greater than or equal to the bottle mouth pressure of the energy recovery bottle 41, the third on-off valve 44 is controlled to disconnect the energy recovery bottle 41 from the input end of the first reversing control valve 32. In this way, the energy collected by the energy recovery bottle 41 can replenish the pumping oil, thereby being able to efficiently and stably deliver hydraulic oil to the clamping cylinder 31.

[0070] Specifically, in the present embodiment, the energy recovery bottle 41 is exemplarily set as a nitrogen bottle. The nitrogen bottle has a nitrogen chamber and an oil chamber separated. When hydraulic oil with a certain pressure is transported into the oil chamber, the hydraulic oil squeezes the nitrogen in the nitrogen chamber. Therefore, when the hydraulic oil in the energy recovery bottle 41 is transported outward, the reaction force applied by the squeezed nitrogen to the hydraulic oil makes the hydraulic oil have a certain impact. So as to achieve energy recovery and oil replenishment. The specific structure of the nitrogen bottle belongs to the prior art and will not be repeated here.

[0071] Specifically, in this embodiment, when the third on-off valve 44 is powered, the third on-off valve 44 is in an off state. The third on-off valve 44 disconnects the energy recovery bottle 41 from the input end of the first reversing control valve 32. When the third on-off valve 44 is powered off, the third on-off valve 44 is in a one-way connection state. The third on-off valve 44 connects the energy recovery bottle 41 to the input end of the first reversing control valve 32 in a one-way manner.

[0072] Preferably, if Figure 1As shown, a first mechanical one-way valve 43 is provided on the pipeline connecting the second switching control valve 42 and the energy recovery bottle 41, and the first mechanical one-way valve 43 can guide the hydraulic oil from the second switching control valve 42 to the energy recovery bottle 41. That is, a first mechanical one-way valve 43 is provided on the pipeline connecting the communication port B2 and the energy recovery bottle 41, so as to prevent the hydraulic oil from being sucked back into the clamping cavity 312.

[0073] Furthermore, in this embodiment, if Figure 1 As shown, the first mechanical one-way valve 43 can also guide the hydraulic oil from the second reversing control valve 42 to the third on-off valve 44. When the oil pumping assembly 2 pumps oil, the energy recovery bottle 41 can stably and reliably deliver hydraulic oil to the first reversing control valve 32 through the third on-off valve 44 according to the pumping pressure of the oil pumping assembly 2.

[0074] Alternatively, if Figure 1 As shown, a first pressure sensor 46 is provided at the mouth of the energy recovery bottle 41 to facilitate real-time monitoring of the mouth pressure of the energy recovery bottle 41. Optionally, a first pressure gauge 47 is also provided at the mouth of the energy recovery bottle 41 to monitor the mouth pressure of the energy recovery bottle 41. It is understandable that the first pressure sensor 46 and the first pressure gauge 47 form a redundant arrangement to improve reliability.

[0075] Specifically, Figure 1 As shown, the mold clamping assembly 3 further includes a second pressure sensor 38. The second pressure sensor 38 is arranged at the inlet and outlet of each mold clamping cavity 312 to facilitate real-time monitoring of the mold clamping force of each mold clamping cavity 312.

[0076] Among them, Figure 1 As shown, the two-platen clamping system also includes an exhaust valve 36 and a second mechanical one-way valve 37, and the clamping cavity 312, the exhaust valve 36, the second mechanical one-way valve 37 and the oil tank 1 are sequentially connected. This arrangement allows the clamping cavity 312 to be exhausted, and external gas and / or debris cannot enter the clamping cavity 312, thereby effectively improving the service life of the clamping cylinder 31. Among them, the specific structure of the exhaust valve 36 belongs to the prior art and will not be repeated here.

[0077] Among them, Figure 1 As shown, the clamping assembly 3 also includes an electronic ruler 39, which is used to monitor the real-time position of a fixed position of the piston rod 311. This is to facilitate the determination of the moving direction and distance change of the piston. Therefore, when demolding, it is convenient to determine whether the movable plate is away from the fixed plate to the expected position. In this embodiment, the expected position is the initial position of the movable plate. Among them, the specific structure of the electronic ruler 39 belongs to the prior art and will not be repeated here.

[0078] Among them, Figure 2As shown, the oil pump assembly 2 includes an oil pump 21, a pilot check valve 22 and a pilot relief valve. The oil tank 1, the oil pump 21, the input end of the pilot check valve 22, the output end of the pilot check valve 22 and the oil inlet P1 are connected in sequence. The pilot relief valve includes a pilot cartridge valve 231 and a relief valve body 232. The first oil inlet and outlet of the pilot cartridge valve 231 and the first pilot oil port of the pilot check valve 22 are both connected to the pipeline connecting the output end of the pilot check valve 22 and the oil inlet P1. The second pilot oil port of the pilot cartridge valve 231 and the input end of the relief valve body 232 are both connected to the pipeline connecting the oil pump 21 and the input end of the pilot check valve 22. The second oil inlet and outlet of the pilot cartridge valve 231 and the output end of the relief valve body 232 are both connected to the oil tank 1.

[0079] Specifically, when the oil pump 21 pumps oil, if the pump oil pressure is less than or equal to the safety pressure, the hydraulic oil flows through the input end of the pilot check valve 22 and the output end of the pilot check valve 22 in sequence and flows to the oil inlet P1. If the pump oil pressure is greater than the safety pressure, the hydraulic oil exceeding the safety pressure flows back to the oil tank 1 through the second oil inlet and outlet and the overflow valve body 232. This ensures the oil supply safety and stability of the two-plate machine clamping system. Specifically, the pilot check valve 22 can prevent the pumped hydraulic oil from being sucked back and damaging or even damaging the oil pump 21. When the pump oil pressure is less than or equal to the safety pressure, the hydraulic oil flows through the input end of the pilot check valve 22 and the output end of the pilot check valve 22 in sequence and flows to the oil inlet P1, which can effectively reduce the pressure loss of the hydraulic oil delivered to the oil inlet P1.

[0080] Specifically, when the two-platen clamping system switches each action, the oil pump 21 is controlled to stop running and reverse the oil pump 21, so that the hydraulic oil in the pipeline between the oil pump 21 and the input end of the pilot check valve 22 is discharged back to the oil tank 1, so as to avoid impact when starting the next action.

[0081] Alternatively, if Figure 2 As shown, the pump oil assembly 2 also includes a filter 24, which is used to filter debris and the like in the hydraulic oil. It is understandable that the number of filters 24 can be adaptively increased and the setting of the filter 24 can be adaptively adjusted according to actual working conditions. In this embodiment, the number of filters 24 is exemplarily set to one, and the filter 24 is located on the pipeline connecting the oil pump 21 and the oil tank 1.

[0082] Alternatively, if Figure 2As shown, a second throttle valve 25 is provided on the pipeline connecting the output end of the pilot check valve 22 and the oil inlet P1 of the first pilot oil port. Optionally, at least one third throttle valve 26 is provided on the pipeline connecting the second pilot oil port to the oil pump 21 and the input end of the pilot check valve 22. In this embodiment, the number of the third throttle valves 26 is two as an example. The second throttle valve 25 and the third throttle valve 26 are provided to further effectively reduce the pressure loss of the hydraulic oil delivered to the oil inlet P1.

[0083] Alternatively, if Figure 2 As shown, the oil pump assembly 2 also includes a third pressure sensor 27 disposed at the output end of the oil pump 21, and the third pressure sensor 27 is used to monitor the oil pumping pressure of the oil pump 21. It is convenient to determine whether to start the energy recovery bottle 41 according to the oil pumping pressure of the oil pump 21. Optionally, the oil pump assembly 2 also includes a second pressure gauge 28 disposed at the output end of the oil pump 21, and the second pressure gauge 28 is used to monitor the oil pumping pressure of the oil pump 21. It is also convenient to determine whether to start the energy recovery bottle 41 according to the oil pumping pressure of the oil pump 21. It can be understood that the third pressure sensor 27 and the second pressure gauge 28 form a redundant setting to improve reliability.

[0084] The present invention also provides a two-platen machine control method for implementing the above-mentioned two-platen machine clamping system. By adopting the two-platen machine control method to control the above-mentioned two-platen machine clamping system, the quality stability of the final product can be effectively improved, the versatility of the two-platen machine clamping system can be effectively improved, the product manufacturing cycle can be effectively shortened to improve the efficiency of injection molding, the energy consumption can be effectively reduced, and the service life of the two-platen machine clamping system can be effectively improved.

[0085] Specifically, the two-trigger control method includes:

[0086] When the clamping forces of multiple clamping cylinders 31 are to be adjusted to be the same, the first reversing control valve 32 is controlled to connect the clamping cavity 312 with the output end of the pump oil assembly 2, and the mold breaking cavity 313 is connected with the oil tank 1. At the same time, the overload pressures of multiple proportional relief valves 33 are controlled to be the same. At the same time, multiple first on-off valves 34 are controlled to connect the corresponding clamping cavity 312 with the second on-off valve 5. At the same time, the second on-off valve 5 is controlled to be in the off state. Then the pump oil assembly 2 is controlled to supply oil to the clamping cavity 312.

[0087] That is, the right station of the first reversing control valve 32 is controlled to be energized. At the same time, the overload pressures of the multiple proportional relief valves 33 are controlled to be the same. At the same time, the multiple first on-off valves 34 are controlled to be de-energized. And at the same time, the second on-off valve 5 is controlled to be energized. Then the pump oil assembly 2 is controlled to supply oil to the clamping cavity 312. As the hydraulic oil is injected into each clamping cavity 312, the final clamping force of the multiple clamping cavities 312 can be adjusted to be consistent. Thereby, the quality stability of the final product can be effectively improved.

[0088] The two-trigger control method also includes:

[0089] When the clamping forces of the multiple clamping cylinders 31 are adjusted to be at least partially different, the first reversing control valve 32 is controlled to connect the clamping cavity 312 with the output end of the pump oil assembly 2, and the demolding cavity 313 is connected with the oil tank 1. At the same time, the overload pressures of the multiple proportional relief valves 33 are controlled to be at least partially different. At the same time, the multiple first on-off valves 34 are controlled to disconnect the corresponding clamping cavity 312 from the second on-off valve 5. Then the pump oil assembly 2 is controlled to supply oil to the clamping cavity 312.

[0090] That is, the right station of the first reversing control valve 32 is controlled to be energized. At the same time, the overload pressures of multiple proportional relief valves 33 are controlled to be at least partially different. At the same time, multiple first on-off valves 34 are controlled to be energized. Then the oil pump assembly 2 is controlled to supply oil to the clamping cavity 312. As the hydraulic oil is injected into each clamping cavity 312, the final clamping force of the multiple clamping cavities 312 can be adjusted to be at least partially different. Thereby, the versatility of the two-platen clamping system can be effectively improved. In this process, the second on-off valve 5 can be energized or de-energized. Preferably, the second on-off valve 5 is de-energized to reduce energy consumption.

[0091] like Figure 3 As shown, the two-trigger control method also includes:

[0092] When the clamping cavity 312 leaks oil, the second reversing control valve 42 is controlled to connect the second on-off valve 5 with the energy recovery bottle 41. The second on-off valve 5 is controlled to connect the second reversing control valve 42 and multiple first on-off valves 34. Multiple first on-off valves 34 are controlled to connect the corresponding mold breaking cavity 313 and the second on-off valve 5. That is, the second reversing control valve 42 is controlled to be energized, the second on-off valve 5 is controlled to be de-energized, and the first on-off valve 34 is controlled to be de-energized.

[0093] When the chamber pressure of the clamping cavity 312 is less than or equal to the bottle mouth pressure of the energy recovery bottle 41, the second switching control valve 42 is controlled to connect the second on-off valve 5 with the oil tank 1. That is, the second switching control valve 42 is controlled to be de-energized.

[0094] It can be understood that when the chamber pressure of the locking cavity 312 is less than or equal to the bottle mouth pressure of the energy recovery bottle 41, the hydraulic oil in the locking cavity 312 can no longer be pressed into the energy recovery bottle 41. At this time, the second reversing control valve 42 is controlled to connect the second on-off valve 5 with the oil tank 1, so that the hydraulic oil in the locking cavity 312 can be returned to the oil tank 1.

[0095] Such an arrangement can not only realize the oil leakage of the clamping cavity 312, but also recover energy to facilitate subsequent oil supply.

[0096] Secondly, such an arrangement also allows the cooling of the product in the mold cavity and the oil draining of the clamping cavity 312 to be carried out simultaneously, thereby further shortening the product manufacturing cycle and improving efficiency.

[0097] The two-trigger control method also includes:

[0098] When the chamber pressure of the clamping cavity 312 is less than or equal to the bottle mouth pressure of the energy recovery bottle 41, the left station of the first reversing control valve 32 is controlled to be powered, and then the oil pump assembly 2 is controlled to supply oil to the demolding cavity 313. When the electronic ruler 39 detects that the position of the piston rod 311 moves to the initial position, the left station of the first reversing control valve 32 is controlled to be powered off, and the oil pump assembly 2 is controlled to stop pumping oil, so that the product can be demolded.

[0099] It can be understood that when the chamber pressure of the clamping cavity 312 is less than or equal to the bottle mouth pressure of the energy recovery bottle 41, the chamber pressures of the mold cavity and the clamping cavity 312 are both atmospheric pressure.

[0100] like Figure 4 As shown, the two-trigger control method also includes:

[0101] When the oil pumping assembly 2 pumps oil, it is determined in real time whether the oil pumping pressure of the oil pumping assembly 2 is less than the bottle mouth pressure of the energy recovery bottle 41 .

[0102] If the pumping oil pressure of the pumping oil assembly 2 is less than the bottle mouth pressure of the energy recovery bottle 41 , the third on-off valve 44 is controlled to be powered off. The third on-off valve 44 connects the energy recovery bottle 41 with the input end of the first reversing control valve 32 .

[0103] If the pumping oil pressure of the pumping oil assembly 2 is greater than or equal to the bottle mouth pressure of the energy recovery bottle 41, the third on-off valve 44 is controlled to be energized. The third on-off valve 44 disconnects the energy recovery bottle 41 from the input end of the first reversing control valve 32.

[0104] This arrangement enables the energy collected by the energy recovery bottle 41 to replenish the pump oil, thereby enabling the hydraulic oil to be efficiently and stably delivered to the clamping cylinder 31 .

[0105] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A two-platen clamping system, comprising an oil tank (1), an oil pump assembly (2) and a plurality of clamping assemblies (3) distributed in parallel; the input end of the oil pump assembly (2) is connected to the oil tank (1); the clamping assembly (3) comprises a clamping cylinder (31), the clamping cylinder (31) comprises a cylinder body and a piston rod (311) slidably arranged on the cylinder body, the piston rod (311) divides the cylinder body into a clamping cavity (312) and a demolding cavity (313); the piston rod (311) is connected to a movable platen and can drive the movable platen to move; characterized in that, The clamping assembly (3) further comprises: a first reversing control valve (32), the first reversing control valve (32) being capable of selectively connecting the mold locking cavity (312) with the output end of the oil pump assembly (2), and connecting the mold breaking cavity (313) with the oil tank (1); or connecting the mold locking cavity (312) with the oil tank (1), and connecting the mold breaking cavity (313) with the output end of the oil pump assembly (2); or closing the mold locking cavity (312), and connecting the mold breaking cavity (313) with the oil tank (1); a proportional relief valve (33) and a first on-off valve (34), wherein the input end of the proportional relief valve (33) is connected to the input end of the first on-off valve (34), and the input end of the proportional relief valve (33) and the input end of the first on-off valve (34) are both connected to the clamping cavity (312); and the output ends of the plurality of first on-off valves (34) are all connected; The two-platen mold locking system further comprises a second on-off valve (5), and the output ends of the plurality of first on-off valves (34) are all connected to the input end of the second on-off valve (5); the first on-off valve (34) can selectively open and close the mold locking cavity (312) and the second on-off valve (5).

2. The two-platen clamping system according to claim 1, characterized in that: The first reversing control valve (32) is a three-position four-way electromagnetic reversing valve, the oil inlet P1 of the first reversing control valve (32) is connected to the output end of the oil pump assembly (2), the communication port A1 of the first reversing control valve (32) is connected to the mold locking cavity (312), the communication port B1 of the first reversing control valve (32) is connected to the mold breaking cavity (313), and the oil return port T1 of the first reversing control valve (32) is connected to the oil tank (1); When the left position of the first reversing control valve (32) is energized, the oil inlet P1 is connected to the connecting port B1, and the connecting port A1 is connected to the oil return port T1; when the right position of the first reversing control valve (32) is energized, the oil inlet P1 is connected to the connecting port A1, and the connecting port B1 is connected to the oil return port T1; when the first reversing control valve (32) is de-energized, the oil inlet P1 and the connecting port A1 are both blocked, and the connecting port B1 is connected to the oil return port T1.

3. The two-platen clamping system according to claim 2, characterized in that: The mold locking assembly (3) further comprises a hydraulically controlled one-way valve (35), wherein the hydraulically controlled one-way valve (35) is arranged on a pipeline connecting the connecting port A1 and the mold locking cavity (312), and a pilot oil port of the hydraulically controlled one-way valve (35) is connected to a pipeline connecting the connecting port B1 and the mold breaking cavity (313).

4. The two-platen clamping system according to any one of claims 1 to 3, characterized in that: The two-platen clamping system further includes an energy recovery component, which includes: An energy recovery bottle (41), wherein the output ends of the plurality of proportional relief valves (33) are all connected to the input end of the energy recovery bottle (41); A second reversing control valve (42), wherein the second on-off valve (5) can selectively open and close the second reversing control valve (42) and a plurality of the first on-off valves (34); the second reversing control valve (42) can selectively connect the second on-off valve (5) to the oil tank (1), or connect the second on-off valve (5) to the energy recovery bottle (41).

5. The two-platen clamping system according to claim 4, characterized in that: A first mechanical one-way valve (43) is provided on a pipeline connecting the second reversing control valve (42) and the energy recovery bottle (41), and the first mechanical one-way valve (43) can guide the hydraulic oil to flow from the second reversing control valve (42) to the energy recovery bottle (41).

6. The two-platen clamping system according to claim 4, characterized in that: The energy recovery component further comprises a third on-off valve (44), which can selectively switch on and off the energy recovery bottle (41) and the input end of the first reversing control valve (32); when the energy recovery bottle (41) and the input end of the first reversing control valve (32) are connected, the third on-off valve (44) can allow the hydraulic oil flowing out of the energy recovery bottle (41) to flow unidirectionally to the input end of the first reversing control valve (32).

7. The two-platen clamping system according to any one of claims 1 to 3, characterized in that: The two-platen mold locking system further comprises an exhaust valve (36) and a second mechanical one-way valve (37); the mold locking cavity (312), the exhaust valve (36), the second mechanical one-way valve (37) and the oil tank (1) are connected in sequence.

8. A two-trigger control method, characterized in that: The two-platen clamping system is used to implement any one of claims 1 to 7, wherein the two-platen control method comprises: When the clamping forces of the plurality of clamping cylinders (31) are to be adjusted to be the same, the first reversing control valve (32) is controlled to connect the clamping cavity (312) with the output end of the pump oil assembly (2), and to connect the demolding cavity (313) with the oil tank (1); at the same time, the overload pressures of the plurality of proportional relief valves (33) are controlled to be the same; at the same time, the plurality of first on-off valves (34) are controlled to connect the corresponding clamping cavity (312) with the second on-off valve (5); at the same time, the second on-off valve (5) is controlled to be in an off state; and then the pump oil assembly (2) is controlled to supply oil to the clamping cavity (312).

9. The two-trigger control method according to claim 8, characterized in that: The two-platen control method further comprises: When the clamping forces of the plurality of clamping cylinders (31) are to be adjusted to be at least partially different, the first reversing control valve (32) is controlled to connect the clamping cavity (312) with the output end of the pump oil assembly (2), and to connect the demolding cavity (313) with the oil tank (1); at the same time, the overload pressures of the plurality of proportional relief valves (33) are controlled to be at least partially different; at the same time, the plurality of first on-off valves (34) are controlled to disconnect the corresponding clamping cavity (312) from the second on-off valve (5); and then the pump oil assembly (2) is controlled to supply oil to the clamping cavity (312).

10. The two-trigger control method according to claim 8, characterized in that: The two-platen machine clamping system further comprises an energy recovery bottle (41) and a second reversing control valve (42); the second on-off valve (5) can selectively open and close the second on-off control valve (42) and a plurality of the first on-off valves (34); the second on-off control valve (42) can selectively connect the second on-off valve (5) to the oil tank (1), or connect the second on-off valve (5) to the energy recovery bottle (41); the two-platen machine control method further comprises: When the clamping cavity (312) leaks oil, the second reversing control valve (42) is controlled to connect the second on-off valve (5) with the energy recovery bottle (41); the second on-off valve (5) is controlled to connect the second reversing control valve (42) with a plurality of the first on-off valves (34); and the plurality of the first on-off valves (34) are controlled to connect the corresponding clamping cavity (312) with the second on-off valve (5); When the chamber pressure of the clamping cavity (312) is less than or equal to the bottle mouth pressure of the energy recovery bottle (41), the second reversing control valve (42) is controlled to connect the second on-off valve (5) with the oil tank (1).

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