Injection molding machine

Abstract

The invention belongs to the technical field of injection molding machines, and particularly relates to an injection molding machine which comprises an oil tank, an oil pump and a controller, the oil tank comprises an air storage cylinder, a sliding part, an oil storage cylinder and a pressure sensor, and the air storage cylinder is provided with an inflation inlet, an exhaust port and a storage cavity formed in the air storage cylinder; the sliding piece is arranged in the storage chamber and is in sealed connection with the inner wall of the storage chamber, and the storage chamber is divided into a gas chamber and a communication chamber; the oil storage cylinder and the air storage cylinder are arranged side by side, the oil storage cylinder is provided with an oil discharge pipe and an oil storage cavity, and the oil storage cavity communicates with the oil pump through the oil discharge pipe and communicates with the communicating cavity. The pressure sensor is arranged on the outer side of the oil storage cylinder and can detect the pressure value of hydraulic oil in the oil storage cavity. The controller can control the volume of gas released into the gas cavity according to the hydraulic oil pressure value detected by the pressure sensor so as to control the position of the sliding part in the storage cavity and adjust the volume of the gas cavity and the communicating cavity. The cleaning degree of the hydraulic oil can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of injection molding machine equipment, and specifically relates to an injection molding machine. Background Art

[0002] Injection molding machine is also known as plastic injection molding machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. Injection molding machines are usually composed of injection system, mold clamping system, hydraulic system, electrical control system, lubrication system, heating and cooling system, safety monitoring system, etc.

[0003] In traditional injection molding machines, the hydraulic power system usually adopts a normal pressure design, but this design will bring the following problems: First, the hydraulic oil is polluted by the outside air, resulting in reduced cleanliness of the hydraulic oil, affecting the performance and service life of the injection molding machine; second, the hydraulic power system working in a normal pressure system will have poor oil absorption, affecting the stability of the hydraulic power system; third, the hydraulic power system also has problems such as slow speed response, affecting the control accuracy and efficiency of the injection molding machine. Summary of the invention

[0004] The purpose of this application is to solve the problems in the prior art that the hydraulic oil is polluted by the external air, resulting in reduced cleanliness of the hydraulic oil, affecting the performance and service life of the injection molding machine; the hydraulic power system has poor oil absorption, affecting the stability of the hydraulic power system; the hydraulic power system has slow speed response, affecting the control accuracy and efficiency of the injection molding machine, etc.

[0005] The present application provides an injection molding machine, the injection molding machine comprising an oil tank, an oil pump and a controller, the oil tank comprising:

[0006] An air storage cylinder, wherein the air storage cylinder is provided with an air charging port, an air exhaust port, and a storage chamber arranged inside the air storage cylinder, and the storage chamber is connected to the outside through the air charging port / the air exhaust port;

[0007] a sliding member, disposed inside the storage chamber and sealedly connected to the inner wall of the storage chamber, the sliding member dividing the storage chamber into a gas chamber and a communication chamber, the gas chamber being connected to the outside through the inflation port, and the communication chamber being connected to the outside through the exhaust port;

[0008] An oil storage cylinder is arranged side by side with the gas storage cylinder, the oil storage cylinder is provided with an oil discharge pipe and an oil storage chamber for storing hydraulic oil, the oil storage chamber is communicated with the oil pump through the oil discharge pipe, and the oil storage chamber is communicated with the communication chamber;

[0009] A pressure sensor is arranged outside the oil storage cylinder, and the pressure sensor can detect the pressure value of the hydraulic oil inside the oil storage chamber;

[0010] Wherein, the controller is capable of controlling the volume of gas released into the gas chamber according to the hydraulic oil pressure value detected by the pressure sensor to control the position of the sliding member inside the storage chamber to adjust the volume size of the gas chamber and the connecting chamber.

[0011] In an exemplary embodiment of the present application, the gas storage cylinder and the oil storage cylinder are arranged side by side up and down.

[0012] In an exemplary embodiment of the present application, the gas storage cylinder comprises:

[0013] A first cylinder head, provided with the charging port;

[0014] a second cylinder head, opposite to and spaced from the first cylinder head, the second cylinder head being provided with the exhaust port;

[0015] A cylinder barrel, the cylinder barrel is a hollow structure, opposite ends of the cylinder barrel are respectively connected to the first cylinder head and the second cylinder head, and form the storage chamber with the first cylinder head and the second cylinder head;

[0016] The sliding member is arranged inside the cylinder barrel and sealed with the inner wall of the cylinder barrel, the sliding member and one side of the second cylinder head form the connecting chamber, and the sliding member and one side of the first cylinder head form the gas chamber.

[0017] In an exemplary embodiment of the present application, the oil storage cylinder comprises:

[0018] a first oil cylinder cover, arranged below the first cylinder cover and abutting against the first cylinder cover, the first oil cylinder cover being provided with the oil drain pipe;

[0019] a second oil cylinder head, opposite to and spaced from the first oil cylinder head, and the second oil cylinder head is arranged below and abuts against the second oil cylinder head, and the pressure sensor is arranged on the second oil cylinder head and communicated with the oil storage chamber;

[0020] The oil cylinder barrel is a hollow structure, and the opposite ends of the oil cylinder barrel are respectively connected to the first oil cylinder head and the second oil cylinder head, and form the oil storage cavity with the first oil cylinder head and the second oil cylinder head.

[0021] In an exemplary embodiment of the present application, the bottom of the second cylinder head is provided with a first opening communicating with the communication chamber;

[0022] A second opening communicating with the oil storage chamber is provided on the top of the second oil cylinder cover, and the second opening corresponds to the first opening;

[0023] Wherein, the oil storage chamber is communicated with the communication chamber through the first opening and the second opening.

[0024] In an exemplary embodiment of the present application, the fuel tank further includes:

[0025] a first connecting member, one end of which is connected to the first cylinder head, and the other end of which is connected to the second cylinder head;

[0026] A second connecting member, one end of which is connected to the first oil cylinder cover, and the other end of which is connected to the second oil cylinder cover.

[0027] In an exemplary embodiment of the present application, a plurality of the first connecting members are provided on the gas storage cylinder, and the plurality of the first connecting members are arranged around the outer side of the cylinder barrel;

[0028] The oil storage cylinder is provided with a plurality of the second connecting members, and the plurality of the second connecting members are arranged around the outer side of the oil cylinder barrel.

[0029] In an exemplary embodiment of the present application, the sliding member includes:

[0030] piston;

[0031] A sealing member is provided around the outer edge of the piston, and the piston is sealedly connected to the inner wall of the storage chamber through the sealing member.

[0032] In an exemplary embodiment of the present application, the oil storage cylinder further includes a filter element disposed inside the oil storage cavity, and the filter element is connected to a side of the oil drain pipe away from the oil pump.

[0033] In an exemplary embodiment of the present application, a needle valve is provided on the top of the second cylinder head, and the needle valve is communicated with the communication chamber.

[0034] The injection molding machine of the present application has at least the following beneficial effects:

[0035] The present application scheme measures the pressure of the hydraulic oil in the oil storage chamber in real time through a pressure sensor, and the controller can control the volume of gas released into the gas chamber in the gas storage cylinder according to the pressure value measured in real time by the pressure sensor, so as to control the position of the sliding member inside the storage chamber, adjust the volume of the gas chamber and the connecting chamber, and further adjust the pressure of the hydraulic oil in the connecting chamber. If the pressure of the hydraulic oil in the oil storage chamber detected by the pressure sensor is less than the preset pressure range value, the controller controls the release of gas into the gas chamber to increase the volume of the gas chamber and reduce the volume of the connecting chamber, so that the sliding member moves to the side away from the inflation port, and uses the sliding member to squeeze the hydraulic oil in the connecting chamber, so that the pressure of the hydraulic oil in the connecting chamber and the oil storage chamber gradually increases, so that the pressure of the hydraulic oil in the oil storage chamber is maintained within the preset pressure range value.

[0036] When the injection molding machine is working, since the pressure of the hydraulic oil in the oil storage chamber is greater than the external pressure, a positive pressure is formed in the oil storage chamber, so that the external air and impurities can be effectively prevented from entering the oil storage chamber, the cleanliness of the hydraulic oil can be improved, and the failure rate of the hydraulic system can be reduced, thereby reducing the maintenance time and cost. In addition, the positive pressure environment in the oil storage chamber can also reduce the contact between the hydraulic oil and oxygen in the air, thereby reducing the oxidation rate and maintaining the stable performance of the hydraulic oil. In addition, the present application scheme can effectively ensure the closure of the hydraulic circuit through the air storage cylinder and the oil storage cylinder, and improve the response speed and accuracy of the hydraulic system. And under the action of the pressure sensor and the controller, it can ensure that the pressure of the hydraulic oil in the oil storage chamber can always maintain a stable oil supply pressure, ensuring that the injection molding machine can obtain sufficient hydraulic power in different working states. In addition, the present application can also ensure that the oil pump always sucks oil under a positive pressure environment through the action of the pressure sensor and the controller, avoiding the phenomenon of cavitation caused by too low pressure at the oil pump suction port, protecting the oil pump, and improving the reliability of the system.

[0037] The oil tank in this solution can also provide stable hydraulic power for the high-speed injection molding machine, ensuring that various actions can be completed quickly and accurately, thereby improving production efficiency and product quality.

[0038] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0039] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A schematic diagram of the three-dimensional structure of the oil tank provided in an embodiment of the present application is shown.

[0042] Figure 2 A schematic diagram of the structure of the oil tank provided in an embodiment of the present application is shown from a left perspective.

[0043] Figure 3 Shown along Figure 2 Schematic diagram of the cross-sectional structure along the A-A' section line.

[0044] Description of reference numerals:

[0045] 100, oil tank; 110, gas storage cylinder; 110a, charging port; 110b, exhaust port; 110c, gas chamber; 110d, connecting chamber; 111, cylinder barrel; 1111, first mounting platform; 1112, second mounting platform; 112, first cylinder head; 1121, first groove; 113, second cylinder head; 1131, second groove; 1132, fifth groove; 120, sliding member; 121, piston; 122 , sealing element; 130, oil storage cylinder; 131, oil drain pipe; 132, oil storage chamber; 133, cylinder barrel; 1331, third mounting platform; 1332, fourth mounting platform; 134, first cylinder head; 1341, third groove; 135, second cylinder head; 1351, fourth groove; 136, filter element; 140, pressure sensor; 150, fastener; 160, first connecting piece; 170, second connecting piece; 180, needle valve. DETAILED DESCRIPTION

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0047] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like 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 this application can be understood according to specific circumstances.

[0049] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the present application.

[0050] Figure 1 A schematic diagram of the three-dimensional structure of the oil tank provided in an embodiment of the present application is shown. Figure 2 A schematic diagram of the structure of the oil tank provided in an embodiment of the present application is shown from a left perspective. Figure 3 Shown along Figure 2 Schematic diagram of the cross-sectional structure along the A-A' section line.

[0051] An embodiment of the present application provides an injection molding machine, which can be used for injection molding of materials such as resin.

[0052] In some embodiments of the present application, the injection molding machine includes an oil tank 100 and an oil pump (not shown in the figure). The oil tank 100 can be used to store hydraulic oil for the hydraulic system of the injection molding machine. The oil pump can be connected to the oil tank 100 to extract the hydraulic oil in the oil tank 100 to the hydraulic system.

[0053] In some embodiments of the present application, see Figure 1 As shown, the oil tank 100 may include an air storage cylinder 110. The air storage cylinder 110 may be a cylindrical structure, and a certain volume of medium may be stored therein. Of course, the air storage cylinder 110 may also be in other shapes, such as a rectangular parallelepiped or ellipsoidal structure.

[0054] In some embodiments of the present application, see Figures 1 to 3 As shown, the gas storage cylinder 110 is provided with a charging port 110a, an exhaust port 110b, and a storage chamber provided inside the gas storage cylinder 110. The storage chamber can be connected to the outside through the charging port 110a and the exhaust port 110b, so as to fill the storage chamber with gas or release the gas in the storage chamber to the outside to increase the pressure in the storage chamber or reduce the pressure in the storage chamber.

[0055] In some embodiments of the present application, see Figure 3 As shown, the oil tank 100 may further include a sliding member 120. The shape of the sliding member 120 may be designed according to the shape of the longitudinal section of the gas storage cylinder 110. For example, if the longitudinal section of the gas storage cylinder 110 is circular, the shape of the sliding member 120 is circular; if the longitudinal section of the gas storage cylinder 110 is square, the shape of the sliding member 120 is square.

[0056] In some embodiments of the present application, see Figure 3 As shown, the sliding member 120 can be slidably disposed in the storage chamber, and the sliding member 120 can divide the storage chamber into a gas chamber 110c and a communication chamber 110d. The sliding member 120 is sealed and connected to the inner wall of the storage chamber, and the gas chamber 110c and the communication chamber 110d are isolated from each other, and the medium between the gas chamber 110c and the communication chamber 110d cannot flow between the gas chamber 110c and the communication chamber 110d.

[0057] In some embodiments of the present application, the gas chamber 110c is connected to the outside through the inflation port 110a, and gas can be pumped into the gas chamber 110c through the inflation port 110a to change the pressure in the gas chamber 110c, thereby pushing the sliding member 120 to slide in the storage chamber, changing the volume of the gas chamber 110c and the volume of the connecting chamber 110d.

[0058] For example, when the sliding member 120 moves away from the gas charging port 110a, the volume of the gas chamber 110c gradually increases, and the volume of the connecting chamber 110d gradually decreases. When the sliding member 120 moves toward the gas charging port 110a, the volume of the gas chamber 110c gradually decreases, and the volume of the connecting chamber 110d gradually increases.

[0059] In some embodiments of the present application, the communication chamber 110d is connected to the outside through the exhaust port 110b, and the exhaust port 110b can exhaust the gas in the communication chamber 110d.

[0060] In some embodiments of the present application, see Figure 1 and Figure 3As shown, the oil tank 100 may further include an oil storage cylinder 130. The oil storage cylinder 130 may be used to store hydraulic oil for the hydraulic system. The oil storage cylinder 130 may be a cylindrical structure or other shapes, such as a rectangular parallelepiped or ellipsoidal structure.

[0061] In some embodiments of the present application, see Figure 3 As shown, the oil storage cylinder 130 is provided with an oil discharge pipe 131 and an oil storage chamber 132. One end of the oil discharge pipe 131 is connected to the oil pump, and the other end of the oil discharge pipe 131 extends into the oil storage chamber 132. The oil discharge pipe 131 extends into the oil storage chamber 132 to directly extract the hydraulic oil in the oil storage chamber 132, which can increase the extraction rate of the hydraulic oil and reduce the resistance of the hydraulic oil extraction, so as to improve the extraction effect of the hydraulic oil.

[0062] In some embodiments of the present application, the oil storage cylinder 130 and the air storage cylinder 110 are arranged side by side, and the oil storage chamber 132 in the oil storage cylinder 130 is connected to the connecting chamber 110d in the air storage cylinder 110, so that a certain amount of hydraulic oil is stored in the connecting chamber 110d.

[0063] It is understandable that when the sliding member 120 moves toward the side away from the inflation port 110a, the sliding member 120 will squeeze the hydraulic oil in the communicating chamber 110d, so that the pressure of the hydraulic oil in the communicating chamber 110d and the oil storage chamber 132 gradually increases.

[0064] In some embodiments of the present application, the injection molding machine further includes a controller (not shown in the figure). The controller can control the oil pump to be in a working state or a shutdown state. The controller can be a programmable logic controller (PLC) or an industrial PC.

[0065] In some embodiments of the present application, see Figure 1 As shown, the oil tank 100 further includes a pressure sensor 140. The pressure sensor 140 is disposed outside the oil storage cylinder 130 to detect the pressure value of the hydraulic oil inside the oil storage chamber 132 and transmit the measured hydraulic oil pressure value to the controller; that is, the pressure sensor 140 is electrically connected to the controller.

[0066] In some embodiments of the present application, a preset pressure range value is provided in the controller. When the pressure value of the hydraulic oil in the oil storage chamber 132 measured by the pressure sensor 140 is lower than the preset pressure range value, the controller will control the volume of gas entering the gas chamber 110c through the inflation port 110a to ensure that the hydraulic oil in the oil storage chamber 132 remains within the preset pressure range value.

[0067] In some embodiments of the present application, the injection molding machine further includes an air pump (not shown in the figure). The air pump is connected to the air filling port 110a on the air storage cylinder 110, and can release gas (for example, inert gas such as nitrogen) into the gas chamber 110c in the air storage cylinder 110. The air pump is also electrically connected to the controller, and the controller can control the air pump to be in a working state or a shutdown state.

[0068] That is to say, the pressure sensor 140, the controller and the air pump can keep the hydraulic oil in the oil storage chamber 132 within a preset pressure range, so that the hydraulic oil always maintains a positive pressure environment.

[0069] For example, if the pressure value of the hydraulic oil in the oil storage chamber 132 measured by the pressure sensor 140 is less than the preset pressure range value, the controller will control the inflation pump to work, and the inflation pump releases gas to the inside of the gas chamber 110c through the inflation port 110a, so that the volume of the gas in the gas chamber 110c gradually increases, and under the action of pressure, the sliding member 120 gradually moves to the side away from the inflation port 110a, so that the volume of the gas chamber 110c gradually increases, and the volume of the connecting chamber 110d gradually decreases, and the sliding member 120 gradually squeezes the hydraulic oil in the connecting chamber 110d, thereby gradually increasing the pressure of the hydraulic oil in the connecting chamber 110d and the oil storage chamber 132, so that the pressure value in the oil storage chamber 132 meets the preset pressure range value.

[0070] The present application scheme measures the pressure of the hydraulic oil in the oil storage chamber 132 in real time through the pressure sensor 140. The controller can control the volume of gas released into the gas chamber 110c in the gas storage cylinder 110 according to the pressure value measured in real time by the pressure sensor 140, so as to control the position of the sliding member 120 inside the storage chamber, adjust the volume of the gas chamber 110c and the connecting chamber 110d, and further adjust the pressure of the hydraulic oil in the connecting chamber 110d. If the hydraulic oil pressure in the oil storage chamber 132 detected by the pressure sensor 140 is lower than the preset pressure range value, the controller controls the release of gas into the gas chamber 110c to increase the volume of the gas chamber 110c and reduce the volume of the connecting chamber 110d, so that the sliding member 120 moves to the side away from the inflation port 110a, and the sliding member 120 is used to squeeze the hydraulic oil in the connecting chamber 110d, so that the pressure of the hydraulic oil in the connecting chamber 110d and the oil storage chamber 132 gradually increases, so that the pressure of the hydraulic oil in the oil storage chamber 132 is maintained within the preset pressure range value.

[0071] When the injection molding machine is working, since the pressure of the hydraulic oil in the oil storage chamber 132 is greater than the external pressure, a positive pressure is formed in the oil storage chamber 132, thereby effectively preventing external air and impurities from entering the oil storage chamber 132, improving the cleanliness of the hydraulic oil, reducing the failure rate of the hydraulic system, and thus reducing maintenance time and cost.

[0072] Furthermore, the positive pressure environment in the oil storage chamber 132 can also reduce the contact between the hydraulic oil and oxygen in the air, thereby reducing the oxidation rate and maintaining stable performance of the hydraulic oil.

[0073] In addition, the present application solution can effectively ensure the closedness of the hydraulic circuit through the air storage cylinder 110 and the oil storage cylinder 130, and improve the response speed and accuracy of the hydraulic system. And under the action of the pressure sensor 140 and the controller, it can ensure that the pressure of the hydraulic oil in the oil storage chamber 132 can always maintain a stable oil supply pressure, ensuring that the injection molding machine can obtain sufficient hydraulic power in different working states.

[0074] Moreover, the present application can ensure that the oil pump always sucks oil under a positive pressure environment through the action of the pressure sensor 140 and the controller, avoiding cavitation caused by too low pressure at the oil pump suction port, protecting the oil pump and improving the reliability of the system.

[0075] The oil tank 100 in this solution can also provide stable hydraulic power for the high-speed injection molding machine, ensuring that various actions can be completed quickly and accurately, thereby improving production efficiency and product quality.

[0076] In some embodiments of the present application, see Figure 1 As shown, the air storage cylinder 110 and the oil storage cylinder 130 can be arranged side by side up and down, or side by side left and right, as long as the air storage cylinder 110 and the oil storage cylinder 130 are connected to each other.

[0077] For example, see Figure 1 and Figure 3 As shown, the air storage cylinder 110 and the oil storage cylinder 130 are arranged side by side up and down, and the air storage cylinder 110 is arranged above the oil storage cylinder 130. When the oil storage cylinder 130 is arranged below the air storage cylinder 110, when the sliding member 120 squeezes the hydraulic oil in the communication chamber 110d, under the action of gravity, the hydraulic oil in the communication chamber 110d flows more easily from the top into the lower oil storage chamber 132, so that the pressure of the hydraulic oil in the oil storage chamber 132 is more easily maintained within the preset pressure range.

[0078] In some embodiments of the present application, see Figure 3 As shown, the gas storage cylinder 110 may include a cylinder barrel 111. The cylinder barrel 111 is a hollow structure, and the cylinder barrel 111 may be a cylindrical structure, or may be other structures, such as a cuboid, an ellipsoid, and the like.

[0079] It should be noted that the sliding member 120 is disposed inside the cylinder tube 111 and abuts against the inner wall of the cylinder tube 111 .

[0080] In some embodiments of the present application, see Figure 1As shown, the gas storage cylinder 110 may further include a first cylinder head 112. The first cylinder head 112 is a square head structure, and of course other types of head structures may also be used, such as a triangular, circular, and other structures.

[0081] In some embodiments of the present application, the first cylinder head 112 is disposed on one axial side of the cylinder barrel 111 to seal one end of the cylinder barrel 111. The first cylinder head 112 has a side wall provided with the above-mentioned charging port 110a, which penetrates the first cylinder head 112 in the axial direction of the cylinder barrel 111, so that the interior of the cylinder barrel 111 is connected to the outside through the charging port 110a.

[0082] It should be noted that see Figure 3 As shown, a gas chamber 110 c is formed on a side of the sliding member 120 facing the first cylinder head 112 , and an air pump can charge air into the gas chamber 110 c through the charging port 110 a .

[0083] In some embodiments of this application, please continue to refer to Figure 3 As shown, the gas storage cylinder 110 may further include a second cylinder head 113. The second cylinder head 113 is a square head structure, and of course other types of head structures may also be used, such as a triangular, circular, and other structures.

[0084] Please continue to see Figure 3 As shown, the second cylinder head 113 is disposed at the other axial side of the cylinder barrel 111 and is disposed opposite and parallel to the first cylinder head 112. The second cylinder head 113 seals the other side of the cylinder barrel 111. The first cylinder head 112 and the second cylinder head 113 seal the cylinder barrel 111 to form a storage chamber, wherein the side of the sliding member 120 facing the charging port 110a forms a gas chamber 110c, and the side of the sliding member 120 facing the second cylinder head 113 forms a communication chamber 110d.

[0085] Please refer to Figure 3 As shown, an exhaust port 110b is provided on the top wall of the second cylinder head 113 to discharge the gas in the hydraulic oil in the connecting chamber 110d or the oil storage chamber 132, to ensure that the hydraulic oil is maintained within a preset pressure range, to ensure the pressure of the hydraulic oil, and to maintain normal operation of the system.

[0086] The gas storage cylinder 110 in the solution of the present application adopts a segmented structure, which can be easier to install and disassemble during installation and maintenance. The segmented splicing structure can also simplify the processing difficulty and improve the equipment accuracy of the gas storage cylinder 110.

[0087] It is worth mentioning that please continue to see Figure 3As shown, the first cylinder head 112 is provided with a first groove 1121 having the same shape as the longitudinal section of the cylinder barrel 111 on one side thereof facing the cylinder barrel 111. That is, a circular first groove 1121 is hollowed out on one side of the first cylinder head 112 facing the cylinder barrel 111.

[0088] In some embodiments of this application, please continue to refer to Figure 3 As shown, an annular first mounting platform 1111 is provided on the outer wall of the cylinder barrel 111 facing the first cylinder head 112, and the distance between the outer wall surface of the first mounting platform 1111 and the axis center line of the cylinder barrel 111 is smaller than the distance between the outer wall surface of the cylinder barrel 111 and the axis center line of the cylinder barrel 111, so as to ensure that the cylinder barrel 111 can be effectively inserted into the first groove 1121 of the first cylinder head 112. When one end of the cylinder barrel 111 is inserted into the first groove 1121, the outer wall surface of the first mounting platform 1111 of the cylinder barrel 111 abuts against the inner wall surface of the first groove 1121.

[0089] Accordingly, please continue to see Figure 3 As shown, the second cylinder head 113 is provided with a second groove 1131 having the same shape as the longitudinal section of the cylinder barrel 111 on one side thereof facing the cylinder barrel 111. That is, a circular second groove 1131 is hollowed out on one side of the second cylinder head 113 facing the cylinder barrel 111.

[0090] In some embodiments of this application, please continue to refer to Figure 3 As shown, an annular second mounting platform 1112 is provided on the outer wall of the cylinder barrel 111 facing the second cylinder head 113, and the distance from the outer wall surface of the second mounting platform 1112 to the axis center line of the cylinder barrel 111 is smaller than the distance from the outer wall surface of the cylinder barrel 111 to the axis center line of the cylinder barrel 111, so as to ensure that the cylinder barrel 111 can be effectively inserted into the second groove 1131 of the second cylinder head 113, and when the other end of the cylinder barrel 111 is inserted into the second groove 1131, the outer wall surface of the second mounting platform 1112 of the cylinder barrel 111 abuts against the inner wall surface of the second groove 1131.

[0091] The diameter of the second groove 1131 is the same as that of the first groove 1121 , and the cylinder barrel 111 is effectively confined between the first cylinder head 112 and the second cylinder head 113 , thereby enhancing the sealing effect of the cylinder barrel 111 .

[0092] In addition, the distance from the top wall of the first cylinder head 112 to the axis of the cylinder barrel 111 is greater than the distance from the outer wall of the cylinder barrel 111 to the axis of the cylinder barrel 111. The distance from the top wall of the second cylinder head 113 to the axis of the cylinder barrel 111 is greater than the distance from the outer wall of the cylinder barrel 111 to the axis of the cylinder barrel 111. By designing that the first cylinder head 112 and the second cylinder head 113 are higher than the cylinder barrel 111, it is possible to prevent foreign objects from directly rubbing against the cylinder barrel 111, thereby ensuring the integrity of the cylinder barrel 111 and further ensuring the sealing effect.

[0093] In some embodiments of the present application, the oil storage cylinder 130 may adopt the same structure as the gas storage cylinder 110, so that the gas storage cylinder 110 and the oil storage cylinder 130 can be stably arranged up and down to ensure overall stability.

[0094] In some embodiments of this application, please continue to refer to Figure 3 As shown, the oil storage cylinder 130 may include an oil cylinder barrel 133. The oil cylinder barrel 133 is a hollow structure, and the oil cylinder barrel 133 may be a cylindrical structure. Of course, the oil cylinder barrel 133 may also be other structures, such as a rectangular parallelepiped, an ellipsoid, and the like.

[0095] In some embodiments of this application, please continue to refer to Figure 3 As shown, the oil storage cylinder 130 may further include a first oil cylinder cover 134. The first oil cylinder cover 134 may have the same structure as the first cylinder cover 112, or may have other structures. The first oil cylinder cover 134 may be disposed at the bottom of the first cylinder cover 112 and abut against the first cylinder cover 112.

[0096] In some embodiments of this application, please continue to refer to Figure 3 As shown, the first oil cylinder cover 134 is a square cover structure. Of course, other types of cover structures may also be used, such as triangular, circular and other structures.

[0097] In some embodiments of this application, please continue to refer to Figure 3 As shown, the first cylinder cover 134 is arranged on one axial side of the cylinder barrel 133 to seal one end of the cylinder barrel 133. The side wall of the first cylinder cover 134 is provided with the above-mentioned drain pipe 131, which is connected to the inside of the cylinder barrel 133 to extract the hydraulic oil inside the cylinder barrel 133.

[0098] In some embodiments of this application, please continue to refer to Figure 3 As shown, the oil storage cylinder 130 may further include a second oil cylinder cover 135. The second oil cylinder cover 135 may have the same structure as the second cylinder cover 113, or may have other structures. The second oil cylinder cover 135 may be disposed at the bottom of the second cylinder cover 113 and abut against the second cylinder cover 113.

[0099] In some embodiments of this application, please continue to refer to Figure 3 As shown, the second oil cylinder cover 135 is a square cover structure, and of course other types of cover structures can also be used, such as triangular, circular, etc. The second oil cylinder cover 135 is arranged on the other axial side of the oil cylinder barrel 133, and is arranged opposite to and parallel to the first oil cylinder cover 134. The second oil cylinder cover 135 seals the other side of the oil cylinder barrel 133.

[0100] Please note that, see Figure 1 As shown, a pressure sensor 140 is provided on the side wall of the second cylinder cover 135. The pressure sensor 140 is used to detect the pressure value of the hydraulic oil inside the cylinder barrel 133 and can transmit a signal to the controller in real time to ensure that the hydraulic oil inside the cylinder barrel 133 remains within a preset pressure range.

[0101] The oil storage cylinder 130 in the present application adopts a segmented structure, which can be easier to install and disassemble during installation and maintenance. The segmented splicing structure can also simplify the processing difficulty and improve the equipment accuracy of the oil storage cylinder 130.

[0102] It is worth mentioning that please continue to see Figure 3 As shown, the first cylinder cover 134 is provided with a third groove 1341 having the same shape as the longitudinal section of the cylinder barrel 133 on one side thereof facing the cylinder barrel 133. That is, the first cylinder cover 134 is provided with a circular third groove 1341 on one side thereof facing the cylinder barrel 133.

[0103] In some embodiments of this application, please continue to refer to Figure 3 As shown, an annular third mounting platform 1331 is provided on the outer wall of the cylinder barrel 133 facing the first cylinder cover 134, and the distance between the outer wall surface of the third mounting platform 1331 and the axis of the cylinder barrel 133 is smaller than the distance between the outer wall surface of the cylinder barrel 133 and the axis of the cylinder barrel 133, so as to ensure that the cylinder barrel 133 can be effectively inserted into the third groove 1341 of the first cylinder cover 134. When one end of the cylinder barrel 133 is inserted into the third groove 1341, the outer wall surface of the third mounting platform 1331 of the cylinder barrel 133 abuts against the inner wall surface of the third groove 1341.

[0104] Accordingly, please continue to see Figure 3 As shown, the side of the second oil cylinder cover 135 facing the oil cylinder barrel 133 is provided with a fourth groove 1351 of the same shape as the longitudinal section of the oil cylinder barrel 133. That is, the side of the second oil cylinder cover 135 facing the oil cylinder barrel 133 is hollowed out to provide a circular fourth groove 1351.

[0105] In some embodiments of this application, please continue to refer to Figure 3As shown, a fourth annular mounting platform 1332 is provided on the outer wall of the cylinder barrel 133 facing the second cylinder cover 135, and the distance from the outer wall surface of the fourth mounting platform 1332 to the axis of the cylinder barrel 133 is smaller than the distance from the outer wall surface of the cylinder barrel 133 to the axis of the cylinder barrel 133, so as to ensure that the cylinder barrel 133 can be effectively inserted into the fourth groove 1351 of the second cylinder cover 135. When the other end of the cylinder barrel 133 is inserted into the fourth groove 1351, the outer wall surface of the fourth mounting platform 1332 of the cylinder barrel 133 abuts against the inner wall surface of the fourth groove 1351.

[0106] The diameter of the fourth groove 1351 is the same as that of the third groove 1341 , and the cylinder barrel 133 is effectively confined between the first cylinder head 134 and the second cylinder head 135 , thereby enhancing the sealing effect of the cylinder barrel 133 .

[0107] In addition, the distance from the top wall of the first oil cylinder cover 134 to the axis of the oil cylinder barrel 133 is greater than the distance from the outer wall of the oil cylinder barrel 133 to the axis of the oil cylinder barrel 133. The distance from the top wall of the second oil cylinder cover 135 to the axis of the oil cylinder barrel 133 is greater than the distance from the outer wall of the oil cylinder barrel 133 to the axis of the oil cylinder barrel 133. By designing that the first oil cylinder cover 134 and the second oil cylinder cover 135 are higher than the oil cylinder barrel 133, it is possible to prevent foreign objects from directly rubbing against the oil cylinder barrel 133, thereby ensuring the integrity of the oil cylinder barrel 133 and further ensuring the sealing effect.

[0108] The first cylinder head 134 and the second cylinder head 135 are used to seal the axial ends of the cylinder barrel 133, so that the first cylinder head 134, the second cylinder head 135 and the cylinder barrel 133 can be used as an oil storage chamber 132 for storing hydraulic oil, which can prevent the hydraulic oil from contacting with foreign substances, ensure the cleanliness of the hydraulic oil, reduce the failure rate of the hydraulic system, and reduce maintenance time and cost.

[0109] It is worth mentioning that the oil storage cylinder 130 and the gas storage cylinder 110 both adopt the same structure, which can improve the stability between the gas storage cylinder 110 and the oil storage cylinder 130 when the gas storage cylinder 110 and the oil storage cylinder 130 are arranged side by side up and down.

[0110] It is worth mentioning that please continue to see Figure 3 As shown, the gas storage cylinder 110 and the oil storage cylinder 130 can be fixed by fasteners 150 such as bolts.

[0111] For example, the gas storage cylinder 110 and the oil storage cylinder 130 are fixed at their connection points by fasteners 150 such as bolts.

[0112] In some embodiments of the present application, the bottom wall of the second cylinder head 113 is provided with a first opening (not shown in the figure) communicating with the communication chamber 110d.

[0113] In some embodiments of the present application, the top wall of the second oil cylinder cover 135 is provided with a second opening (not shown in the figure) communicating with the oil storage chamber 132. The second opening corresponds to the first opening. The oil storage chamber 132 is communicated with the communication chamber 110d through the second opening and the first opening, so that when the sliding member 120 squeezes the hydraulic oil in the communication chamber 110d, it can generate a squeezing force on the hydraulic oil in the oil storage chamber 132, increase the pressure of the hydraulic oil, ensure that the hydraulic oil is maintained within a preset pressure range, provide a positive pressure environment for the hydraulic oil, ensure the cleanliness of the hydraulic oil, reduce the oxidation rate of the hydraulic oil, and improve the response speed and accuracy of the system.

[0114] In some embodiments of this application, please continue to refer to Figure 3 As shown, the second cylinder head 113 is further provided with a fifth groove 1132. The fifth groove 1132 is provided on a side of the second groove 1131 away from the sliding member 120, and the diameter of the fifth groove 1132 is smaller than the diameter of the second groove 1131. The fifth groove 1132 is connected to the first opening and the second opening, and the fifth groove 1132 can be used to buffer part of the hydraulic oil.

[0115] It should be noted that the diameter of the fifth groove 1132 is the same as the diameter of the inner wall of the cylinder barrel 111 to ensure that the sliding member 120 can slide into the second cylinder head 113 to further squeeze the hydraulic oil to ensure that the hydraulic oil can be within a preset pressure range.

[0116] In some embodiments of the present application, see Figure 1 As shown, the oil tank 100 may further include a first connecting member 160 . One end of the first connecting member 160 is connected to the first cylinder head 112 , and the other end is connected to the second cylinder head 113 , and the first connecting member 160 is disposed outside the cylinder barrel 111 .

[0117] That is, the first connecting member 160 is extended in the axial direction of the cylinder barrel 111, and the first connecting member 160 is used to fix the first cylinder head 112, the cylinder barrel 111 and the second cylinder head 113 together, thereby ensuring the tightness of the connection between the first cylinder head 112, the cylinder barrel 111 and the second cylinder head 113, improving the sealing effect of the storage chamber, and avoiding air leakage or oil leakage.

[0118] It should be noted that the first connecting member 160 and the first cylinder head 112 and the second cylinder head 113 may be connected by threads or by other means, such as snap-fitting, welding, etc.

[0119] In some embodiments of this application, please continue to refer to Figure 1As shown, one end of the first connecting member 160 passes through the first cylinder head 112 , and the portion of the first connecting member 160 passing through the first cylinder head 112 is threadedly connected by a nut to connect the first connecting member 160 and the first cylinder head 112 together.

[0120] Accordingly, please continue to see Figure 1 As shown, the other end of the first connecting member 160 also passes through the second cylinder head 113, and the portion of the first connecting member 160 passing through the second cylinder head 113 is threadedly connected using a nut to connect the first connecting member 160 and the second cylinder head 113 together.

[0121] That is, the first cylinder head 112 , the cylinder barrel 111 and the second cylinder head 113 are fixed as a whole through the nut and the first connecting member 160 , thereby improving the overall stability of the gas storage cylinder 110 .

[0122] In some embodiments of this application, please continue to refer to Figure 1 As shown, the oil tank 100 may further include a second connecting member 170 . One end of the second connecting member 170 is connected to the first oil cylinder cover 134 , and the other end is connected to the second oil cylinder cover 135 , and the second connecting member 170 is disposed outside the oil cylinder barrel 133 .

[0123] That is, the second connecting member 170 is extended in the axial direction of the cylinder barrel 133, and the first cylinder head 134, the cylinder barrel 133 and the second cylinder head 135 are fixed together by the second connecting member 170, so as to ensure the tightness of the connection between the first cylinder head 134, the cylinder barrel 133 and the second cylinder head 135, improve the sealing effect of the oil storage chamber 132, and avoid oil leakage.

[0124] Please refer to Figure 1 As shown, the second connecting member 170 can be connected to the first cylinder cover 134 and the second cylinder cover 135 by threads, or by other means, such as snap-fit, welding, etc.

[0125] In some embodiments of this application, please continue to refer to Figure 1 As shown, one end of the second connecting member 170 passes through the first cylinder cover 134 , and the portion of the second connecting member 170 passing through the first cylinder cover 134 is threadedly connected by a nut to connect the second connecting member 170 and the first cylinder cover 134 together.

[0126] Accordingly, please continue to see Figure 1 As shown, the other end of the second connecting member 170 also passes through the second cylinder cover 135, and the portion of the second connecting member 170 passing through the second cylinder cover 135 is threadedly connected using a nut to connect the second connecting member 170 and the second cylinder cover 135 together.

[0127] That is, the first oil cylinder cover 134 , the oil cylinder barrel 133 and the second oil cylinder cover 135 are fixed as a whole through the nut and the second connecting member 170 , thereby improving the overall stability of the oil storage cylinder 130 .

[0128] In some embodiments of this application, please continue to refer to Figure 1 As shown, the gas storage cylinder 110 is provided with a plurality of first connecting members 160. The plurality of first connecting members 160 are arranged around the cylinder barrel 111, and the plurality of first connecting members 160 can improve the stability of the gas storage cylinder 110, prevent the gas storage cylinder 110 from shaking, and ensure the sealing effect of the gas storage cylinder 110.

[0129] For example, please see Figure 1 As shown, four first connecting members 160 are provided on the gas storage cylinder 110 , and the four first connecting members 160 are respectively provided at four corners of the first cylinder head 112 and the second cylinder head 113 to ensure the stability of the gas storage cylinder 110 .

[0130] In some embodiments of this application, please continue to refer to Figure 1 As shown, the oil storage cylinder 130 is provided with a plurality of second connecting members 170. The plurality of second connecting members 170 are arranged around the oil cylinder barrel 133, and the plurality of second connecting members 170 can improve the stability of the oil storage cylinder 130, prevent the oil storage cylinder 130 from shaking, and ensure the sealing effect of the oil storage cylinder 130.

[0131] For example, please see Figure 1 As shown, four second connecting members 170 are provided on the oil storage cylinder 130 , and the four second connecting members 170 are respectively provided at four corners of the first oil cylinder cover 134 and the second oil cylinder cover 135 to ensure the stability of the oil storage cylinder 130 .

[0132] It can be understood that the first connecting member 160 and the second connecting member 170 can adopt the same structure, such as a cylindrical rod-shaped structure.

[0133] In some embodiments of this application, see Figure 3 As shown, the sliding member 120 may include a piston 121 and a sealing member 122. The sealing member 122 is arranged around the outer edge of the piston 121, and the piston 121 is sealedly connected to the inner wall of the cylinder barrel 111 through the sealing member 122 to prevent the gas in the gas chamber 110c and the hydraulic oil in the communication chamber 110d from flowing mutually, thereby ensuring the sealing of the gas chamber 110c and the communication chamber 110d.

[0134] It should be noted that after the piston 121 is placed inside the cylinder barrel 111, it can be inflated into the gas chamber 110c through the inflation port 110a, so that the piston 121 can move to the second cylinder head 113. During operation, the hydraulic oil in the oil storage chamber 132 will push the piston 121 to move to the side close to the inflation port 110a, so that a connecting chamber 110d is formed between the piston 121 and the second cylinder head 113, and a dynamic balance is maintained between the gas chamber 110c and the connecting chamber 110d. The controller can then adjust the pressure in the gas chamber 110c according to the pressure signal detected by the pressure sensor 140, adjust the position of the piston 121 in the storage chamber, and then adjust the pressure range of the hydraulic oil to ensure that the hydraulic oil in the oil storage chamber 132 is maintained in a positive pressure environment.

[0135] In some embodiments of this application, please continue to refer to Figure 3 As shown, the oil storage cylinder 130 further includes a filter 136 disposed inside the oil storage chamber 132. The filter 136 is disposed on the side of the oil discharge pipe 131 away from the oil pump, that is, when the oil pump extracts the hydraulic oil in the oil storage chamber 132, it is filtered in advance by the filter 136 and then discharged into the oil pump through the oil discharge pipe 131, and finally enters the hydraulic system to work, thereby ensuring the cleanliness of the hydraulic oil entering the hydraulic system, reducing the failure rate of the hydraulic system, and thus reducing maintenance time and cost.

[0136] In some embodiments of this application, please continue to refer to Figure 3 As shown, a needle valve 180 is also provided on the top wall of the second cylinder head 113. The needle valve 180 can cooperate with the oil port on the second cylinder head 113 to allow oil to enter or drain into the communicating chamber 110d and the oil storage chamber 132.

[0137] This application solution has at least the following technical effects:

[0138] Through the air storage cylinder 110, the oil storage cylinder 130, the sliding member 120, the pressure sensor 140 and the controller, the hydraulic oil inside the oil storage cylinder 130 can be maintained in a positive pressure environment, that is, the pressure inside the oil storage chamber 132 is greater than the external environmental pressure, which can effectively prevent external dust, water vapor or other impurities from entering the oil storage chamber 132, improve the cleanliness and stability of the hydraulic oil, reduce the failure rate of the hydraulic system, and thus reduce maintenance time and cost.

[0139] Maintaining a positive pressure environment inside the oil storage chamber 132 can also reduce the contact between the hydraulic oil and oxygen in the air, thereby reducing the oxidation rate of the hydraulic oil and ensuring the stable performance of the hydraulic oil.

[0140] Maintaining a positive pressure environment inside the oil storage chamber 132 can also maintain a stable oil supply pressure, ensuring that the injection molding machine can obtain sufficient hydraulic power under different working conditions. Providing a stable oil supply pressure can ensure consistency and reliability during the injection molding stage and reduce defects in the product.

[0141] Maintaining a positive pressure environment inside the oil storage chamber 132 can also keep the pressure at the oil pump suction port positive, avoid cavitation, protect the oil pump or other key components, and improve the reliability of the entire system.

[0142] In addition, the entire hydraulic circuit of the hydraulic oil is in a closed loop, which can improve the response speed and accuracy of the entire system.

[0143] The oil tank 100 can also provide stable hydraulic power for the high-speed injection molding machine, ensuring that it can quickly and accurately complete various actions, thereby improving production efficiency and product quality.

[0144] In the description of this specification, the description with reference to the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0145] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. An injection molding machine, characterized in that: The injection molding machine comprises an oil tank, an oil pump and a controller, wherein the oil tank comprises: An air storage cylinder, wherein the air storage cylinder is provided with an air charging port, an air exhaust port, and a storage chamber arranged inside the air storage cylinder, and the storage chamber is connected to the outside through the air charging port / the air exhaust port; a sliding member, disposed inside the storage chamber and sealedly connected to the inner wall of the storage chamber, the sliding member dividing the storage chamber into a gas chamber and a communication chamber, the gas chamber being connected to the outside through the inflation port, and the communication chamber being connected to the outside through the exhaust port; An oil storage cylinder is arranged side by side with the gas storage cylinder, the oil storage cylinder is provided with an oil discharge pipe and an oil storage chamber for storing hydraulic oil, the oil storage chamber is communicated with the oil pump through the oil discharge pipe, and the oil storage chamber is communicated with the communication chamber; A pressure sensor is arranged outside the oil storage cylinder, and the pressure sensor can detect the pressure value of the hydraulic oil inside the oil storage chamber; Wherein, the controller is capable of controlling the volume of gas released into the gas chamber according to the hydraulic oil pressure value detected by the pressure sensor to control the position of the sliding member inside the storage chamber to adjust the volume size of the gas chamber and the connecting chamber.

2. The injection molding machine according to claim 1, characterized in that: The gas storage cylinder and the oil storage cylinder are arranged side by side up and down.

3. The injection molding machine according to claim 2, characterized in that: The gas storage cylinder comprises: A first cylinder head, provided with the charging port; a second cylinder head, opposite to and spaced from the first cylinder head, the second cylinder head being provided with the exhaust port; A cylinder barrel, the cylinder barrel is a hollow structure, opposite ends of the cylinder barrel are respectively connected to the first cylinder head and the second cylinder head, and form the storage chamber with the first cylinder head and the second cylinder head; The sliding member is arranged inside the cylinder barrel and sealed with the inner wall of the cylinder barrel, the sliding member and one side of the second cylinder head form the connecting chamber, and the sliding member and one side of the first cylinder head form the gas chamber.

4. The injection molding machine according to claim 3, characterized in that: The oil storage cylinder comprises: a first oil cylinder cover, arranged below the first cylinder cover and abutting against the first cylinder cover, the first oil cylinder cover being provided with the oil drain pipe; a second oil cylinder head, opposite to and spaced from the first oil cylinder head, and the second oil cylinder head is arranged below and abuts against the second oil cylinder head, and the pressure sensor is arranged on the second oil cylinder head and communicated with the oil storage chamber; The oil cylinder barrel is a hollow structure, and the opposite ends of the oil cylinder barrel are respectively connected to the first oil cylinder head and the second oil cylinder head, and form the oil storage cavity with the first oil cylinder head and the second oil cylinder head.

5. The injection molding machine according to claim 4, characterized in that: The bottom of the second cylinder head is provided with a first opening communicating with the communication chamber; A second opening communicating with the oil storage chamber is provided on the top of the second oil cylinder cover, and the second opening corresponds to the first opening; Wherein, the oil storage chamber is communicated with the communication chamber through the first opening and the second opening.

6. The injection molding machine according to claim 4, characterized in that: The fuel tank also includes: a first connecting member, one end of which is connected to the first cylinder head, and the other end of which is connected to the second cylinder head; A second connecting member, one end of which is connected to the first oil cylinder cover, and the other end of which is connected to the second oil cylinder cover.

7. The injection molding machine according to claim 6, characterized in that The gas storage cylinder is provided with a plurality of the first connecting members, and the plurality of the first connecting members are arranged around the outer side of the cylinder barrel; The oil storage cylinder is provided with a plurality of the second connecting members, and the plurality of the second connecting members are arranged around the outer side of the oil cylinder barrel.

8. The injection molding machine according to claim 1, characterized in that: The sliding member comprises: piston; A sealing member is provided around the outer edge of the piston, and the piston is sealedly connected to the inner wall of the storage chamber through the sealing member.

9. The injection molding machine according to claim 1, characterized in that: The oil storage cylinder further comprises a filter element arranged inside the oil storage cavity, and the filter element is connected to a side of the oil drain pipe away from the oil pump.

10. The injection molding machine according to claim 3, characterized in that: A needle valve is provided on the top of the second cylinder head, and the needle valve is communicated with the communication chamber.

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