An electro-hydraulic hybrid power system for a vertical parting flaskless injection molding machine

Abstract

The present invention discloses an electro-hydraulic hybrid power system of a vertical parting boxless injection molding machine, including a main oil cylinder, a positive pressure plate servo drive mechanism, a back pressure plate servo drive mechanism and a servo hydraulic system, wherein the servo hydraulic system is connected to the main oil cylinder, one end of the main oil cylinder is connected to the positive pressure plate servo drive mechanism, and the other end is connected to the back pressure plate servo drive mechanism; the main oil cylinder includes a machine base, an oil cylinder support, a positive pressure plate oil cylinder and a back pressure plate oil cylinder, and the back pressure plate oil cylinder and the positive pressure plate oil cylinder are connected by an intermediate connector; the servo hydraulic system includes a base, a servo pump group, an oil tank assembly, a control valve group and a liquid filling valve group, the upper part of the liquid filling valve group is connected to the oil tank assembly, and the lower part of the liquid filling valve group is connected to the intermediate connector. The present invention adopts an electro-hydraulic hybrid power system of a vertical parting boxless injection molding machine of the above structure, which has fast response, high efficiency, simple and compact structure, low energy consumption, low noise and simple operation.

Description

Technical Field

[0001] The invention relates to the technical field of vertical parting boxless injection molding machines, and in particular to an electric-hydraulic hybrid power system of a vertical parting boxless injection molding machine. Background Art

[0002] The power system of the vertical parting boxless injection molding machine is comparable to the "heart" of the molding machine, which determines the working performance of the molding machine. The traditional power system adopts a pure hydraulic power system in the form of "constant pressure variable pump + proportional reversing valve". Although the principle of this system is simple, the response speed is easily constrained by the performance of the variable pump and the proportional valve. The requirements for the variable pump and the proportional valve are relatively high, and it is not easy to achieve a high response speed of the system. In view of the above reasons, it is necessary to design an electro-hydraulic hybrid power system for the vertical parting boxless injection molding machine. Summary of the invention

[0003] The purpose of the present invention is to provide an electro-hydraulic hybrid power system for a vertical parting boxless injection molding machine, which has fast response, high efficiency, simple and compact structure, low energy consumption, low noise and simple operation.

[0004] To achieve the above-mentioned object, the present invention provides an electro-hydraulic hybrid power system of a vertical parting boxless injection molding machine, comprising a main oil cylinder, a positive pressure plate servo drive mechanism, a reverse pressure plate servo drive mechanism and a servo hydraulic system, wherein the servo hydraulic system is connected to the main oil cylinder, one end of the main oil cylinder is connected to the positive pressure plate servo drive mechanism, and the other end is connected to the reverse pressure plate servo drive mechanism;

[0005] The main oil cylinder comprises a machine base, a cylinder support arranged on the machine base, a positive pressure plate oil cylinder arranged on one side of the oil cylinder support, and a reverse pressure plate oil cylinder arranged on the other side of the oil cylinder support, wherein the reverse pressure plate oil cylinder and the positive pressure plate oil cylinder are connected by an intermediate connecting body, and the intermediate connecting body is fixed at the center position of the oil cylinder support;

[0006] The servo hydraulic system includes a base, a servo pump group arranged on the base, an oil tank assembly connected to the servo pump group, a control valve group connected to the oil tank assembly, and a filling valve group connected to the control valve group, the upper part of the filling valve group is connected to the oil tank assembly, and the lower part of the filling valve group is connected to the intermediate connecting body.

[0007] Preferably, the control valve group is mounted on the base and is connected to the servo pump group, the oil tank assembly and the filling valve group through a pipeline system.

[0008] Preferably, the oil tank assembly is mounted on the base and is connected to the servo pump group through an oil suction pipe.

[0009] Preferably, the positive pressure plate servo drive mechanism includes a positive pressure plate assembly connected to the end of the positive pressure plate cylinder, a protective tube connected to the positive pressure plate assembly, a protective tube bracket connected to the other end of the protective tube, and a motor group bracket connected to the protective tube bracket, the motor group bracket is installed on the cylinder barrel of the positive pressure plate cylinder, a first positive servo motor group is installed on one side of the motor group bracket, and a second positive servo motor group is installed on the other side of the motor group bracket.

[0010] Preferably, a rack bracket is installed on the machine base, and positive pressure plate racks are provided on both sides of the rack bracket, and the positive pressure plate racks on both sides are respectively meshed with the first positive servo motor group and the second positive servo motor group.

[0011] Preferably, the back-pressure plate servo drive mechanism includes a guide cylinder group bracket installed on the cylinder barrel of the back-pressure plate cylinder and a guide cylinder group connected to the front of the guide cylinder group bracket, the front of the guide cylinder group is connected to the back-pressure plate assembly through the cavity assembly, back-pressure plate racks are installed on both sides of the guide cylinder group, the first back-servo motor group and the second back-servo motor group are respectively meshed on the back-pressure plate racks on both sides, and the second back-servo motor group and the first back-servo motor group are respectively fixed on both sides of the cylinder support.

[0012] Preferably, a guide rail bracket is installed on the machine base, guide rails are installed on both sides of the guide rail bracket, and the guide cylinder group bracket is supported on the guide rails through guide wheels.

[0013] Therefore, the present invention adopts an electro-hydraulic hybrid power system of a vertical parting boxless injection molding machine with the above structure, which has the following beneficial effects:

[0014] (1) The servo hydraulic system is used for compaction, which can provide higher compaction force and meet the requirements of sand mold hardness under different casting processes;

[0015] (2) The positive pressure plate assembly is driven by a servo motor group, which can improve the response speed of the positive pressure plate assembly and monitor and control the real-time position and speed of the positive pressure plate assembly with higher accuracy;

[0016] (3) The back pressure plate assembly is driven by a servo motor group, which can improve the response speed of the back pressure plate assembly and monitor and control the real-time position and speed of the back pressure plate assembly with higher precision.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of an electric-hydraulic hybrid power system of a vertical parting flaskless injection molding machine of the present invention;

[0019] Figure 2 It is a schematic diagram of the main oil cylinder structure of an embodiment of an electric-hydraulic hybrid power system of a vertical parting flaskless injection molding machine of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a positive pressure plate servo drive mechanism of an embodiment of an electro-hydraulic hybrid power system of a vertical parting flaskless injection molding machine of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a back pressure plate servo drive mechanism of an embodiment of an electro-hydraulic hybrid power system of a vertical parting flaskless injection molding machine of the present invention;

[0022] Figure 5 The present invention is a schematic diagram of the servo hydraulic system structure of an embodiment of an electric-hydraulic hybrid power system of a vertical parting boxless injection molding machine. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0024] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] Example

[0026] Figure 1This is a structural schematic diagram of an embodiment of an electro-hydraulic hybrid power system of a vertical parting boxless injection molding machine of the present invention. As shown in the figure, the present invention provides an electro-hydraulic hybrid power system of a vertical parting boxless injection molding machine, including a main oil cylinder 1, a positive pressure plate servo drive mechanism 2, a back pressure plate servo drive mechanism 3 and a servo hydraulic system 4. The servo hydraulic system 4 is connected to the main oil cylinder 1, and one end of the main oil cylinder 1 is connected to the positive pressure plate servo drive mechanism 2, and the other end is connected to the back pressure plate servo drive mechanism 3. The main oil cylinder is used to drive the positive pressure plate assembly and the back pressure plate assembly to realize compaction action; the positive pressure plate servo drive mechanism is used to drive the positive pressure plate assembly to realize actions such as rapid ejection, mold closing, mold removal, and rapid return; the back pressure plate servo drive mechanism is used to drive the back pressure plate assembly to realize actions such as mold removal, rapid opening, rapid closing, and cavity closing; the servo hydraulic system is used to provide pressure oil to the main oil cylinder, so that it can drive the positive pressure plate assembly and the back pressure plate assembly to complete the compaction action. The specific work can be divided into two steps: hydraulic compaction process and servo motor drive process:

[0027] The first step is hydraulic compaction mode: the hydraulic servo system enters the high-pressure working state to provide pressure oil to the main cylinder and drive the positive pressure plate assembly and the back pressure plate assembly to complete compaction. During this process, the positive pressure plate servo drive mechanism and the back pressure plate servo drive mechanism only monitor the real-time position of the positive pressure plate assembly and the back pressure plate assembly, and no power output is performed.

[0028] The second step is the servo motor drive mode: the back pressure plate servo drive mechanism drives the back pressure plate assembly to demold and open quickly, the positive pressure plate servo drive mechanism drives the positive pressure plate assembly to push out quickly and complete the mold closing, the positive pressure plate servo drive mechanism drives the positive pressure plate assembly to demold and return quickly, the back pressure plate servo drive mechanism drives the back pressure plate assembly to close quickly and complete the cavity closing. During this process, the hydraulic servo system is in a low-pressure standby state, only providing and absorbing pressure-free hydraulic oil for the main cylinder action, and no power output is performed.

[0029] Figure 2 The main oil cylinder structure schematic diagram of the embodiment of the electric-hydraulic hybrid power system of a vertical parting boxless injection molding machine of the present invention is shown in the figure. As shown in the figure, the main oil cylinder 1 includes a machine base 11, a cylinder support 12 arranged on the machine base 11, a positive pressure plate oil cylinder 13 arranged on one side of the oil cylinder support 12, and a back pressure plate oil cylinder 14 arranged on the other side of the oil cylinder support 12. The back pressure plate oil cylinder 14 and the positive pressure plate oil cylinder 13 are connected by an intermediate connector 15, and the intermediate connector 15 is fixed at the center of the oil cylinder support 12. The pressure oil can enter the plunger cavity of the positive pressure plate oil cylinder and the back pressure plate oil cylinder through the intermediate connector, thereby driving the cylinder barrel of the positive pressure plate oil cylinder and the cylinder barrel of the back pressure plate oil cylinder to extend.

[0030] Figure 5The servo hydraulic system structure schematic diagram of an embodiment of an electric-hydraulic hybrid power system of a vertical parting boxless injection molding machine of the present invention, as shown in the figure, the servo hydraulic system 4 includes a base 41, a servo pump group 42 arranged on the base 41, an oil tank assembly 43 connected to the servo pump group 42, a control valve group 44 connected to the oil tank assembly 43 and a filling valve group 45 connected to the control valve group 44, the upper part of the filling valve group 45 is connected to the oil tank assembly 43, and the lower part of the filling valve group 45 is connected to the intermediate connector 15. The control valve group 44 is installed on the base 41 and is connected to the servo pump group 42, the oil tank assembly 43 and the filling valve group 45 through the pipeline system 46. The oil tank assembly 43 is installed on the base 41 and is connected to the servo pump group 42 through the oil suction pipe. Before compaction, the filling valve group needs to be modulated and closed under the action of the control valve group, so that the main oil cylinder and the oil tank assembly are in a disconnected state, and the servo pump group enters the high-pressure working state to output pressure oil. Under the action of the control valve group, the pressure oil enters the main oil cylinder through the pipeline system, thereby prompting the main oil cylinder to drive the positive pressure plate assembly and the reverse pressure plate assembly to complete the compaction action. After the compaction is completed, the servo pump group switches to the low-pressure standby state, and the filling valve group opens under the action of the control valve group, so that the main oil cylinder and the oil tank assembly are in a connected state, and the pressure in the main oil cylinder is released. At this time, the main oil cylinder is in a free and pressureless state, and then switches to the servo motor drive process.

[0031] Figure 3 The present invention is a schematic diagram of the structure of the positive pressure plate servo drive mechanism of the electro-hydraulic hybrid power system embodiment of the vertical parting boxless injection molding machine. As shown in the figure, the positive pressure plate servo drive mechanism 2 includes a positive pressure plate assembly 21 connected to the end of the positive pressure plate oil cylinder 13, a protective tube 22 connected to the positive pressure plate assembly 21, a protective tube bracket 23 connected to the other end of the protective tube 22, and a motor group bracket 24 connected to the protective tube bracket 23. The motor group bracket 24 is installed on the cylinder barrel of the positive pressure plate oil cylinder 13. A first positive servo motor group 25 is installed on one side of the motor group bracket 24, and a second positive servo motor group 26 is installed on the other side of the motor group bracket 24. A rack bracket 27 is installed on the machine base 11, and positive pressure plate racks 28 are arranged on both sides of the rack bracket 27. The positive pressure plate racks 28 on both sides are respectively engaged with the first positive servo motor group 25 and the second positive servo motor group 26. The first positive servo motor group and the second positive servo motor group operate synchronously and, under the action of the positive pressure plate rack, can drive the cylinder of the positive pressure plate oil cylinder to move, thereby driving the positive pressure plate assembly to move. During the movement of the positive pressure plate assembly, the real-time position and real-time speed of the positive pressure plate assembly can be monitored in real time by the first positive servo motor group and the second positive servo motor group.

[0032] Figure 4The present invention is a schematic diagram of the structure of the back pressure plate servo drive mechanism of the electro-hydraulic hybrid power system embodiment of the vertical parting boxless injection molding machine. As shown in the figure, the back pressure plate servo drive mechanism 3 includes a guide cylinder group bracket 31 installed on the cylinder barrel of the back pressure plate oil cylinder 14 and a guide cylinder group 32 connected to the front of the guide cylinder group bracket 31. The front of the guide cylinder group 32 passes through the cavity assembly 33 and is connected to the back pressure plate assembly 34. The guide cylinder group 32 is installed with a back pressure plate rack 35 on both sides. The back pressure plate racks 35 on both sides are respectively engaged with the first back servo motor group 36 and the second back servo motor group 37. The second back servo motor group 37 and the first back servo motor group 36 are respectively fixed on both sides of the oil cylinder support 12. A guide rail bracket 38 is installed on the machine base 11. Guide rails 39 are installed on both sides of the guide rail bracket 38. The guide cylinder group bracket 31 is supported on the guide rail 39 through guide wheels. The first counter-servo motor group and the second counter-servo motor group output power at the same time, and drive the guide rod group to move under the action of the counter-pressure plate rack, thereby driving the counter-pressure plate assembly to move, and at the same time driving the cylinder of the counter-pressure plate oil cylinder to move. During the movement of the counter-pressure plate assembly, the real-time position and real-time speed of the counter-pressure plate assembly can be monitored in real time by the first counter-servo motor group and the second counter-servo motor group.

[0033] Therefore, the present invention adopts an electro-hydraulic hybrid power system of a vertical parting boxless injection molding machine of the above structure, which has fast response, high efficiency, simple and compact structure, low energy consumption, low noise and simple operation.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. An electro-hydraulic hybrid power system for a vertical parting flaskless injection molding machine, characterized in that: It includes a main oil cylinder, a positive pressure plate servo drive mechanism, a negative pressure plate servo drive mechanism and a servo hydraulic system, wherein the servo hydraulic system is connected to the main oil cylinder, one end of the main oil cylinder is connected to the positive pressure plate servo drive mechanism, and the other end is connected to the negative pressure plate servo drive mechanism; The main oil cylinder comprises a machine base, a cylinder support arranged on the machine base, a positive pressure plate oil cylinder arranged on one side of the oil cylinder support, and a reverse pressure plate oil cylinder arranged on the other side of the oil cylinder support, wherein the reverse pressure plate oil cylinder and the positive pressure plate oil cylinder are connected by an intermediate connecting body, and the intermediate connecting body is fixed at the center position of the oil cylinder support; The servo hydraulic system includes a base, a servo pump group arranged on the base, an oil tank assembly connected to the servo pump group, a control valve group connected to the oil tank assembly and a filling valve group connected to the control valve group, the upper part of the filling valve group is connected to the oil tank assembly, and the lower part of the filling valve group is connected to the intermediate connector; the positive pressure plate servo drive mechanism includes a positive pressure plate assembly connected to the end of the positive pressure plate oil cylinder, a protective pipe connected to the positive pressure plate assembly, a protective pipe bracket connected to the other end of the protective pipe and a motor group bracket connected to the protective pipe bracket, the motor group bracket is installed on the cylinder of the positive pressure plate oil cylinder On the cylinder, a first positive servo motor group is installed on one side of the motor group bracket, and a second positive servo motor group is installed on the other side of the motor group bracket; the back pressure plate servo drive mechanism includes a guide cylinder group bracket installed on the back pressure plate cylinder barrel and a guide cylinder group connected to the front of the guide cylinder group bracket, the front of the guide cylinder group is connected with a back pressure plate assembly through a cavity assembly, back pressure plate racks are installed on both sides of the guide cylinder group, the back pressure plate racks on both sides are respectively meshed with the first back servo motor group and the second back servo motor group, the second back servo motor group and the first back servo motor group are respectively fixed on both sides of the cylinder support.

2. The electro-hydraulic hybrid power system of a vertical parting flaskless injection molding machine according to claim 1, characterized in that: The control valve group is installed on the base and is connected with the servo pump group, the oil tank assembly and the filling valve group through a pipeline system.

3. The electro-hydraulic hybrid power system of a vertical parting flaskless injection molding machine according to claim 2, characterized in that: The oil tank assembly is installed on the base and is connected with the servo pump group through an oil suction pipe.

4. The electro-hydraulic hybrid power system of the vertical parting flaskless injection molding machine according to claim 1, characterized in that: A rack bracket is installed on the machine base, and positive pressure plate racks are arranged on both sides of the rack bracket. The positive pressure plate racks on both sides are respectively meshed with the first positive servo motor group and the second positive servo motor group.

5. The electro-hydraulic hybrid power system of the vertical parting flaskless injection molding machine according to claim 1, characterized in that: A guide rail bracket is installed on the machine base, guide rails are installed on both sides of the guide rail bracket, and the guide cylinder group bracket is supported on the guide rails through guide wheels.

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