A mechanical lock-up based on hydraulic system control

Abstract

The utility model relates to mechanical mould locking technical field especially, more particularly to a kind of mechanical mould locker based on hydraulic system control. Including multiple mould lockers, mould locker includes mould locker installation base, mould locker installation base upper portion is provided with mould shell, hydraulic cylinder is provided in mould shell, hydraulic cylinder is divided into rod cavity and rod cavity, hydraulic cylinder piston rod extends the mould shell, further include control valve body, control valve body A mouth is connected to the rod cavity of multiple hydraulic cylinders by pipeline, control valve body B mouth is connected to the rod cavity of multiple hydraulic cylinders by pipeline. Control valve body A mouth and multiple hydraulic cylinders rod cavity are evenly provided with hydraulic control check valve one, control valve body B mouth and multiple hydraulic cylinders rod cavity are provided with hydraulic control check valve two. The hydraulic control check valve one is connected on the pipeline of the lower end of hydraulic control check valve two, and the hydraulic control check valve two 4 is connected on the pipeline of the lower end of hydraulic control check valve.

Description

Technical Field

[0001] This utility model relates to the field of mechanical mold-locking technology, and in particular to a mechanical mold-locking device based on hydraulic system control. Background Technology

[0002] The main function of a mold clamping device is to ensure that the mold is securely fixed in the appropriate position during injection molding, stamping or other manufacturing processes, preventing the mold from shifting or falling off under high pressure, thereby ensuring the safety of the production process and the precision of the finished product.

[0003] In the piping design of mold clamping devices, pneumatic pump control and ordinary mechanical clamping device control are commonly used. However, these methods have several drawbacks in practical applications: high cost (pneumatic pump control is expensive, and if pneumatic control of the clamping device to retract and release the mold is required, an additional clamping device control cylinder is needed); unstable motion transmission (air is highly compressible, and the transmission of motion is not smooth or uniform under varying loads); noise pollution (pneumatic control generates significant exhaust noise, affecting the working environment and the health of operators); and safety issues (ordinary mechanical clamping device control, relying on the clamping device's own wedge-shaped mechanical self-locking and pipeline cross-control, is susceptible to clamping device failure due to pipeline loosening and pressure relief).

[0004] Therefore, this utility model proposes a mechanical clamping device based on hydraulic system control, which aims to reduce costs and increase the clamping force of the clamping device. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a hydraulic press and its pressing method for forming carbon fiber wheel hubs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A mechanical mold clamping device based on hydraulic system control is characterized by comprising multiple mold clamping devices, each mold clamping device including a mold clamping device mounting base, a mold clamping housing disposed above the mold clamping device mounting base, a hydraulic cylinder disposed inside the mold clamping housing, the hydraulic cylinder being divided into a rod chamber and a rodless chamber, the piston rod of the hydraulic cylinder extending out of the mold clamping housing, and further comprising a control valve body, the A port of the control valve body being connected to the rodless chamber of the multiple hydraulic cylinders via a pipeline, and the B port of the control valve body being connected to the rod chamber of the multiple hydraulic cylinders via a pipeline.

[0007] Furthermore, the pipelines of the valve body A port and rodless chamber are connected to the pipelines of the control valve body B port and rod chamber via a tubular bidirectional hydraulic lock.

[0008] Furthermore, a detection device fixing bracket is installed on the side of the mold housing, and a displacement detection device for detecting the displacement of the hydraulic cylinder piston rod is installed on the detection device fixing bracket.

[0009] Furthermore, pressure sensors are connected to the pipeline between the control valve body and the hydraulic cylinder.

[0010] Furthermore, a mold wedge-shaped top block is fixedly connected to one side of the piston rod end of the hydraulic cylinder.

[0011] Furthermore, the control valve body is a three-position four-way solenoid directional valve.

[0012] Compared with existing technologies, the mechanical mold clamping device based on hydraulic system control provided by this utility model has the following advantages: 1. Economic efficiency: The cost can be reduced to a certain extent by using a hydraulically controlled mechanical clamping method; 2. Stability: Safety and stability are improved by using a self-locking device in the pipeline and adding a displacement detection device to the clamping device. The mechanical clamping device can maintain a stable clamping force for a long time through the self-locking characteristics of the mechanical structure and the self-locking angle of the wedge mechanism, preventing gaps from appearing in the mold during injection and pressure holding, thereby ensuring the quality and dimensional accuracy of the product. 3. High efficiency: Driven by a hydraulic system, it has a strong power output capability and can drive the opening, closing and locking of large molds, making it suitable for handling large-volume and high-difficulty mold operations. 4. High flexibility; quick mold changes can be completed by ejecting and retracting the mold clamping device. 5. Provide feedback and early warning: Adding a pressure detection feedback device to the pipeline and a displacement detection device to the clamping device can enable real-time feedback and display of the pressure in the pipeline. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the hydraulic principle framework of this utility model; Figure 2 This is a schematic diagram of the mold clamping device structure in this utility model; Figure 3 This is a schematic diagram of the hydraulic principle framework in the existing technology; In the diagram: 1. Mold clamping device; 11. Mold clamping device mounting base; 12. Mold clamping housing; 13. Hydraulic cylinder; 14. Rod chamber; 15. Rodless chamber; 16. Hydraulic cylinder piston rod; 17. Mold wedge-shaped top block; 18. Detection device fixing bracket; 2. Control valve body; 3. Hydraulic check valve one; 4. Hydraulic check valve two. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "first", "second", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] Figure 3 The diagram shows the layout of pipelines in existing technology, where different control valves control the rod-side and rodless sides of the hydraulic cylinder. However, this pipeline layout involves intersections, which can easily transmit vibrations, potentially leading to loose connections or fatigue damage. Intersecting layouts require more space, especially in densely populated areas, making installation and maintenance more difficult. Furthermore, intersecting pipeline layouts appear cluttered and aesthetically unappealing.

[0017] Example 1: like Figures 1-2 As shown, a mechanical mold clamping device based on hydraulic system control includes multiple mold clamping devices 1. Each mold clamping device 1 includes a mold clamping device mounting base 11. A mold clamping housing 12 is disposed above the mold clamping device mounting base 11. A hydraulic cylinder 13 is disposed inside the mold clamping housing 12. The hydraulic cylinder is divided into a rod chamber 14 and a rodless chamber 15. The piston rod 16 of the hydraulic cylinder extends out of the mold clamping housing 12. The device also includes a control valve body 2. The A port of the control valve body is connected to the rodless chamber 15 of the multiple hydraulic cylinders 13 through a pipeline, and the B port of the control valve body is connected to the rod chamber 14 of the multiple hydraulic cylinders 13 through a pipeline.

[0018] This technical solution utilizes a hydraulic system to control multiple mold clamping devices 1, enabling them to lock the mold. The hydraulic system enhances the stability of the clamping force on the mold. The hydraulic system is compact and lightweight, facilitating installation and maintenance. It also boasts high rigidity, precision, and fast response: providing significant rigidity and precision with a rapid response; and high driving force, suitable for heavy-duty direct drive, enabling low-speed, high-tonnage motion—advantages unmatched by other transmission methods. The control valve body 2 is a three-position four-way solenoid directional valve.

[0019] Example 2: Based on the above embodiments, continue to refer to, as follows Figures 1-2 As shown, the pipeline connecting port A and rodless chamber 15 of the control valve body 2 to port B and rod chamber 14 of the control valve body 2 is connected via a tubular bidirectional hydraulic lock. The tubular bidirectional hydraulic lock is existing technology and consists of a hydraulically controlled check valve 3 and a hydraulically controlled check valve 4. The hydraulically controlled check valve 3 is installed on the pipeline between port A of the control valve body 2 and the rodless chamber 15 of the multiple hydraulic cylinders 13, and the hydraulically controlled check valve 4 is installed on the pipeline between port B of the control valve body 2 and the rod chamber 14 of the multiple hydraulic cylinders 13. The hydraulically controlled check valve is a valve that allows reverse flow by controlling fluid pressure. In a hydraulic system, it plays a crucial role in ensuring that fluid flows along a predetermined path.

[0020] The branch line of the pipeline on the hydraulic control check valve 3 is connected to the control oil port of the hydraulic control check valve 4, and the branch line of the pipeline on the hydraulic control check valve 4 is connected to the control oil port of the hydraulic control check valve 3.

[0021] In this embodiment, the pipeline connecting the control valve body 2 and the hydraulic control check valve 3, and the pipeline near the hydraulic control check valve 3, is connected to the hydraulic control check valve 4. The pipeline connecting the control valve body 2 and the hydraulic control check valve 4, and the pipeline near the hydraulic control check valve 4, is connected to the hydraulic control check valve 3. This connection method can ensure the stability of the entire mold clamping device hydraulic system. For example, if there is a problem with the pipeline from the hydraulic control check valve 3 to the control valve body 2, the hydraulic control check valve 3 can also lock the hydraulic oil, so that the hydraulic cylinder maintains a stable pressure. The hydraulic control check valve 3 and the hydraulic control check valve 4 can also be easily depressurized.

[0022] Example 3: A detection device fixing bracket 18 is installed on the side of the mold locking housing 12. A displacement detection device for detecting the displacement of the hydraulic cylinder piston rod 16 is installed on the detection device fixing bracket 18. Pressure sensors are connected to the pipeline between the control valve body 2 and the hydraulic cylinder 13.

[0023] In this embodiment, the displacement detection device is a proximity switch. An L-shaped sensing plate is installed on the hydraulic cylinder piston rod 16. As the hydraulic cylinder piston rod 16 extends or retracts, the L-shaped sensing plate cooperates with the proximity switch on the mold clamping housing 12 to detect whether the hydraulic cylinder piston rod 16 has been ejected to the correct position. If it is detected that the piston rod 16 has not been ejected to the correct position, a signal is sent to the control system to prevent the risk of the mold falling due to the mold clamping device 1 not being ejected to the correct position. In this embodiment, the displacement detection device can be a proximity switch or other displacement detection device.

[0024] The pressure sensor can detect the pressure in the rodless chamber 15. In this embodiment, the pressure sensor is connected between the rodless chamber 15 and the hydraulic check valve 3, and can detect the pressure in this section of the pipeline to ensure the stability of the pressure in the rodless chamber.

[0025] Example 4: A mold wedge-shaped top block 17 is fixedly connected to one side of the end of the hydraulic cylinder piston rod 16.

[0026] In this embodiment, the lower side of the end of the hydraulic cylinder piston rod 16 is designed as a horizontal part, and the mold wedge-shaped top block 17 is connected below the horizontal part. The wedge-shaped surface of the mold wedge-shaped top block 17 is adapted to the mold contact surface, that is, the wedge-shaped surface contacts each other, so as to maintain a stable clamping force for a longer period of time, prevent gaps from appearing in the mold during injection and pressure holding process, thereby ensuring the quality and dimensional accuracy of the product.

[0027] The working principle of this utility model is as follows: Figure 2 As shown, the mold clamping device 1 is fixedly connected to the mold clamping device mounting base 11 on the movable crossbeam of the hydraulic press. When the control valve body 2, i.e., the three-position four-way solenoid valve, is normally not energized and is in the neutral position, the mold clamping device 1 is in the released position, and the hydraulic cylinder piston rod 16 will not extend and will not lock the mold. When the mold needs to be locked, the right end of the control valve body 2, i.e., the three-position four-way solenoid valve, is energized, and hydraulic oil flows from the P port of the control valve body 2 into the rodless chamber 15 of the hydraulic cylinder 13. The hydraulic cylinder piston rod 16 extends, thus locking the mold. The one-way valve connected between the rodless chamber 15 and the control valve body 2 can maintain a constant pressure in the rodless chamber 15. A pressure detection device is also connected to the pipeline connected to the rodless chamber 15 to detect the pressure in the rodless chamber 15, which can detect the pressure in the pipeline and monitor the pressure change in the pipeline in real time. A displacement detection device is also installed on the hydraulic cylinder piston rod 16 to provide feedback on the extension status of the hydraulic cylinder piston rod 16 and detect whether it is in place.

[0028] When the mold needs to be released to relieve pressure, the left end of the control valve body 2, i.e., the three-position four-way solenoid valve, is energized, and the P port and B port of the control valve body 2 are connected. Hydraulic oil flows from the P port and B port of the control valve body 2 into the rod chamber 14 of the hydraulic cylinder 13. Since the hydraulic control check valve 2 4 and the hydraulic control check valve 3 are interconnected, the hydraulic oil flowing from the B port of the control valve body 2 flows into the hydraulic control check valve 3 through the pipeline before entering the check valve 2 4. At this time, the control piston in the hydraulic control check valve 3 will be pushed open by the hydraulic oil, so that the hydraulic control check valve 3 is reversed and allows the hydraulic oil in the rodless chamber 15 to flow in reverse. Thus, the rodless chamber 15 can be depressurized, the hydraulic cylinder piston rod 16 retracts, and the mold is released. Similarly, when the hydraulic cylinder 13 is to be filled with fluid again, the right end of the control valve body 2 is energized, and the hydraulic oil flowing in from port A of the control valve body 2 will also flow into the hydraulic control check valve 4 through the pipeline, pushing open the control piston of the hydraulic control check valve 4, so that the hydraulic oil in the rod chamber 14 flows back to the oil tank to relieve pressure, and the hydraulic cylinder piston rod 16 extends to lock the mold again.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mechanical mold clamping device based on hydraulic system control, characterized in that, The device includes multiple mold clamping devices (1), each mold clamping device (1) includes a mold clamping device mounting base (11), a mold clamping housing (12) is provided above the mold clamping device mounting base (11), a hydraulic cylinder (13) is provided inside the mold clamping housing (12), the hydraulic cylinder is divided into a rod chamber (14) and a rodless chamber (15), the piston rod (16) of the hydraulic cylinder extends out of the mold clamping housing (12), and also includes a control valve body (2), the A port of the control valve body (2) is connected to the rodless chamber (15) of the multiple hydraulic cylinders (13) through a pipeline, and the B port of the control valve body (2) is connected to the rod chamber (14) of the multiple hydraulic cylinders (13) through a pipeline.

2. The mechanical mold clamping device based on hydraulic system control according to claim 1, characterized in that: The pipelines of the A port and rodless chamber (15) of the control valve body (2) are connected to the pipelines of the B port and rod chamber (14) of the control valve body (2) through the mold clamp (1).

3. The mechanical mold clamping device based on hydraulic system control according to claim 1, characterized in that: The mold housing (12) is equipped with a detection device fixing bracket (18) on its side, and a displacement detection device for detecting the displacement of the hydraulic cylinder piston rod (16) is installed on the detection device fixing bracket (18).

4. A mechanical mold clamping device based on hydraulic system control according to claim 1, characterized in that: Pressure sensors are connected to the pipeline between the control valve body (2) and the hydraulic cylinder (13).

5. A mechanical mold clamping device based on hydraulic system control according to claim 1, characterized in that: A mold wedge-shaped top block (17) is fixedly connected to one side of the bottom of the hydraulic cylinder piston rod (16).

6. A mechanical mold clamping device based on hydraulic system control according to claim 1, characterized in that: The control valve body (2) is a three-position four-way solenoid directional valve.

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