A high-speed precise switch mode control oil way board

Abstract

This application relates to the field of hydraulic technology for injection molding machines, and provides a high-speed, precision mold-opening control circuit board. In use, the hydraulic fluid enters the P port of the first directional valve from the main return port. Adjusting the valve core position directs the fluid to the A / B ports of the first directional valve, entering the rodless / rod-side connection port, thus supplying oil to the rodless / rod-side chambers of the mold-locking cylinder. Simultaneously, oil from the rod / rodless chambers of the mold-locking cylinder discharges to the rod / rodless interface, allowing the fluid to flow to the T port of the first directional valve. Because a differential circuit is provided, activating the differential circuit connects the passage between the A port of the first directional valve and the rodless / rodless connection port with the passage between the T port of the first directional valve and the main return port. This allows the fluid entering the rodless / rodless chamber of the mold-locking cylinder simultaneously with the fluid entering the rodless / rodless chamber, creating a confluence effect that enables the mold-locking cylinder to move at a faster speed, improving production efficiency.

Description

Technical Field

[0001] This application belongs to the field of hydraulic technology for injection molding machines, and in particular relates to a high-speed and precision mold opening and closing control circuit board. Background Technology

[0002] Mold opening and closing control refers to the control of the mold opening and closing of the mold locking cylinder.

[0003] In existing injection molding machines, when opening and closing the mold, an electromagnetic reversing valve is often used to control the mold clamping cylinder to open and close the mold. The flow rate and pressure of the mold clamping cylinder are adjusted by controlling the overall oil supply and pressure through the injection molding machine's controller and servo system.

[0004] With the increasing product cycle time and the growing demand for automation from producers and operators, the current method of controlling the mold-closing cylinder solely through electromagnetic reversing valves for mold opening and closing, combined with the injection molding machine's controller and servo system to adjust the overall oil flow and pressure of the mold-closing cylinder, results in slow mold opening and closing speeds and low production efficiency. Furthermore, when the mold-closing cylinder needs to move at high speeds, it is prone to impacts that can cause jamming, reducing the yield of finished products and accelerating component wear. Therefore, the existing mold opening and closing control hydraulic circuit cannot meet the requirements for the rapid movement of the mold-closing cylinder, resulting in low production efficiency. Utility Model Content

[0005] This application provides a high-speed and precision mold opening and closing control circuit board, which can solve the problem that the existing mold opening and closing control circuit cannot meet the requirements of the mold locking cylinder for rapid mold opening and closing, resulting in low production efficiency.

[0006] This application provides a high-speed, precision switching mode control circuit board, comprising:

[0007] plate body;

[0008] The main oil inlet is located on the outer surface of the plate and is used to connect with the oil outlet of an external oil supply device.

[0009] The main oil return port is located on the outer surface of the plate and is used to connect to the oil inlet of the external oil tank.

[0010] The rod cavity connection port is located on the outer surface of the plate and is used to communicate with the rod cavity of the external mold clamping cylinder;

[0011] The rodless cavity connection port is located on the outer surface of the plate and is used to communicate with the rodless cavity of the external clamping cylinder;

[0012] A first directional valve, mounted on the plate, has its P port connected to the main oil inlet, its T port connected to the main oil return port, its A port connected to the rodless chamber connection port, and its B port connected to the rod chamber connection port; and

[0013] The differential circuit is integrated on the plate. One end of the differential circuit is connected to the passage between the A port and the rodless chamber connection port of the first directional valve, and the other end of the differential circuit is connected to the passage between the T port and the main return port of the first directional valve.

[0014] Optionally, the differential circuit includes a check valve and a throttle valve. The throttle valve is connected in series in the passage between the T port of the first directional valve and the total return port. The passage between the throttle valve and the T port of the first directional valve is connected to the passage between the A port of the first directional valve and the rodless chamber connection port through the check valve. The check valve guides the oil from the passage between the throttle valve and the T port of the first directional valve to the passage between the A port of the first directional valve and the rodless chamber connection port.

[0015] Optionally, the differential circuit also includes a two-way cartridge valve and a switching valve. The inlet of the two-way cartridge valve is connected to the T port of the first directional valve, and the outlet of the two-way cartridge valve is connected to the main return port. The control end of the two-way cartridge valve is connected to the passage between the switching valve, the throttle valve, and the main return port through the switching valve.

[0016] Optionally, the switching valve can be a three-position four-way solenoid directional valve, wherein the neutral position function of the switching valve is "O" type, and the P port of the switching valve is connected to the control terminal of the two-way cartridge valve, the A port of the switching valve is connected to the passage between the throttle valve and the main return port, and the T port and the B port of the switching valve are both blocked.

[0017] Optionally, the valve core of the two-way cartridge valve has a throttling channel and is equipped with damping. The throttling channel connects the oil inlet end of the two-way cartridge valve and the control end of the two-way cartridge valve.

[0018] Optionally, the first directional valve is a three-position four-way pilot-operated solenoid directional valve, and the pilot oil circuit of the first directional valve is connected to the main return port.

[0019] Optionally, the neutral position function of the first directional valve is "O".

[0020] Optionally, the mold switching control circuit board also includes a second reversing valve, a motor oil outlet connection port, and a motor oil inlet connection port. The second reversing valve is mounted on the board body, and the motor oil outlet connection port and the motor oil inlet connection port are both mounted on the outer surface of the board body. The P port of the second reversing valve is connected to the main oil inlet port, the T port of the second reversing valve is connected to the main oil return port, the A port of the second reversing valve is connected to the motor oil outlet connection port, and the B port of the second reversing valve is connected to the motor oil inlet connection port. The motor oil outlet connection port and the motor oil inlet connection port are used to connect to the two ports of the mold adjusting motor of the injection molding machine, respectively.

[0021] Optionally, the second directional valve is a three-position four-way solenoid directional valve, with its position function being "O".

[0022] The high-precision mold opening and closing control hydraulic circuit board provided in this application allows hydraulic fluid to enter the P port of the first directional valve from the main inlet. The valve core position is adjusted by the first directional valve, causing the hydraulic fluid to flow from the P port to the A / B port, thus entering the rodless / rod-side connection port. This provides oil to the rodless / rod-side of the injection molding machine's mold clamping cylinder. Simultaneously, the rod / rodless chamber of the injection molding machine's mold clamping cylinder discharges oil to the rod / rodless interface. This causes the oil to flow to port T of the first directional valve. Because a differential circuit is provided, the differential circuit can be opened at this time, connecting the passage between port A and the rodless chamber of the first directional valve with the passage between port T and the main return port of the first directional valve. This allows the oil to enter the rodless chamber of the mold-locking cylinder at the same time as the oil in the rod chamber of the mold-locking cylinder enters the rodless chamber of the mold-locking cylinder through the differential circuit, forming a merging effect. This allows the mold-locking cylinder to move at a faster speed, thereby improving production efficiency.

[0023] Other beneficial effects of this application will be described in detail in the following detailed description section. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the hydraulic circuit of a high-speed and precision switching mold control circuit board provided in an embodiment of this application;

[0026] Figure 2 A schematic diagram of the overall structure of a high-speed and precision switching mode control circuit board provided in an embodiment of this application. Figure 1 ;

[0027] Figure 3 A schematic diagram of the overall structure of a high-speed and precision switching mode control circuit board provided in an embodiment of this application. Figure 2 .

[0028] [Explanation of Labels in the Attached Image]

[0029] 1. Plate body; 2. Main oil inlet; 3. Main oil return port; 4. Rod chamber connection port; 5. Rodless chamber connection port; 6. First directional valve;

[0030] 7. Differential circuit;

[0031] 71. Check valve; 72. Throttling valve; 73. Two-way cartridge valve; 74. On / off valve;

[0032] 8. Second directional valve; 9. Motor oil outlet connection port; 10. Motor oil inlet connection port;

[0033] 100. Mold-locking cylinder; 200. Mold-adjusting motor. Detailed Implementation

[0034] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0035] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application 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 application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0041] Currently, the existing mold opening and closing control oil circuit cannot meet the requirements of the mold locking cylinder for rapid mold opening and closing, resulting in low production efficiency.

[0042] To address the aforementioned problems, embodiments of this application provide a high-speed, precision switching mode control circuit board, such as... Figures 1 to 3 As shown, the mold-closing control hydraulic circuit board includes: a board body 1, a main oil inlet 2, a main oil return outlet 3, a rod-side cavity connection port 4, a rodless cavity connection port 5, a first directional valve 6, and a differential circuit 7; the main oil inlet 2 is located on the outer surface of the board body 1 and is used to connect with the oil outlet of an external oil supply device; the main oil return outlet 3 is located on the outer surface of the board body 1 and is used to connect with the oil inlet of an external oil tank; the rod-side cavity connection port 4 is located on the outer surface of the board body 1 and is used to connect with the rod-side cavity of the external mold-closing cylinder 100; the rodless cavity connection port 5 is located on the outer surface of the board body 1 and is used to connect with the rod-side cavity of the external mold-closing cylinder 100. The rodless chamber of 00 is connected; the first directional valve 6 is disposed on the plate 1, the P port of the first directional valve 6 is connected to the total oil inlet 2, the T port of the first directional valve 6 is connected to the total oil return port 3, the A port of the first directional valve 6 is connected to the rodless chamber connection port 5, and the B port of the first directional valve 6 is connected to the rod chamber connection port 4; the differential circuit 7 is integrated on the plate 1, one end of the differential circuit 7 is connected to the passage between the A port of the first directional valve 6 and the rodless chamber connection port 5, and the other end of the differential circuit 7 is connected to the passage between the T port of the first directional valve 6 and the total oil return port 3.

[0043] The high-speed, precision mold-opening control hydraulic circuit board provided in this application, during use, allows hydraulic fluid to enter the P port of the first directional valve 6 from the main inlet 2. By adjusting the valve core position of the first directional valve 6, the hydraulic fluid flows from the P port to the A / B port of the first directional valve 6, thereby allowing the hydraulic fluid to enter the rodless chamber connection port 5 / rod chamber connection port 4. This results in the rodless / rod chamber of the injection molding machine's mold-closing cylinder 100 receiving hydraulic fluid. Simultaneously, the rod / rodless chamber of the injection molding machine's mold-closing cylinder 100 discharges hydraulic fluid to the rod / rodless chamber interface, thus allowing the hydraulic fluid to flow smoothly into the rodless chamber. The fluid flows to port T of the first directional valve 6. Because a differential circuit 7 is provided, the differential circuit 7 can be opened at this time, connecting the passage between port A of the first directional valve 6 and the rodless chamber connection port 5 with the passage between port T of the first directional valve 6 and the main return port 3. This allows the oil to enter the rodless chamber of the mold-locking cylinder 100 at the same time as the oil enters the rod chamber of the mold-locking cylinder 100, and the oil in the rod chamber of the mold-locking cylinder 100 can also enter the rodless chamber of the mold-locking cylinder 100 through the differential circuit 7 to form a confluence effect, thereby enabling the mold-locking cylinder 100 to have a faster movement speed, thus improving production efficiency.

[0044] In some embodiments of this application, such as Figures 1 to 3 As shown, the differential circuit 7 includes a check valve 71 and a throttle valve 72. The throttle valve 72 is connected in series in the passage between the T port of the first directional valve 6 and the total return port 3. The passage between the throttle valve 72 and the T port of the first directional valve 6 is connected to the passage between the A port of the first directional valve 6 and the rodless chamber connection port 5 through the check valve 71. The check valve 71 unidirectionally guides the oil from the passage between the throttle valve 72 and the T port of the first directional valve 6 to the passage between the A port of the first directional valve 6 and the rodless chamber connection port 5.

[0045] The aforementioned one-way valve 71 is used to prevent the oil in the passage between the A port of the first directional valve 6 and the rodless chamber connection port 5 from flowing back to the passage between the throttle valve 72 and the T port of the first directional valve 6, so that the oil flowing out from the A port of the directional valve will not be depressurized in supplying oil to the mold-locking cylinder 100. The aforementioned throttle valve 72 is used to control the flow rate of oil entering the passage between the A port of the first directional valve 6 and the rodless chamber connection port 5, so as to avoid hydraulic shock and improve system stability.

[0046] In some other embodiments of this application, the one-way valve 71 and the throttle valve 72 described above can be replaced with a one-way throttle valve.

[0047] It should be noted that the aforementioned throttle valve 72 can be a manual throttle valve or an electrically controlled throttle valve. When the throttle valve is electrically controlled, it can be connected to the controller of the injection molding machine to enable the controller to control it. It should be noted that the aforementioned controller is a commonly used component in the prior art. Its function is to control the flow rate of the oil flowing through the throttle valve 72 and the pilot pressure of the throttle valve 72.

[0048] The one-way throttle valve integrates the functions of two components, one-way valve 71 and throttle valve 72, making the design simpler and easier to use.

[0049] In some embodiments of this application, such as Figure 1 As shown, the differential circuit 7 also includes a two-way cartridge valve 73 and a switching valve 74. The oil inlet of the two-way cartridge valve 73 is connected to the T port of the first directional valve 6, and the oil outlet of the two-way cartridge valve 73 is connected to the total return port 3. The control end of the two-way cartridge valve 73 is connected to the passage between the switching valve 74, the throttle valve 72 and the total return port 3.

[0050] The aforementioned two-way cartridge valve 73, in conjunction with the switching valve 74, controls the flow of oil from the T port of the first directional valve 6 directly to the main return port 3 or to the passage between the throttle valve 72 and the check valve 71, thereby controlling whether the check valve 71 and the throttle valve 72 are working.

[0051] In some embodiments of this application, the switching valve can be a three-position four-way solenoid directional valve, wherein the neutral position function of the switching valve is "O" type, and the P port of the switching valve is connected to the control terminal of the two-way cartridge valve, the A port of the switching valve is connected to the passage between the throttle valve and the main return port, and the T port and the B port of the switching valve are both blocked.

[0052] The aforementioned switching valve can be a three-position four-way solenoid directional valve. Its neutral position function is "O" type. When the valve is in the neutral position, all oil ports are closed, and the valve core is locked in the current position. It will not move due to external force, which is extremely safe. It can achieve precise positioning and hold, thereby making the control of whether the check valve and throttle valve are working more precise.

[0053] It is understandable that the aforementioned switching valve can be connected to the controller of the injection molding machine to control its working state, thereby adjusting the control end of the two-way cartridge valve and controlling the pilot pressure of the two-way cartridge valve. It should be noted that the controller controlling the working state of the switching valve is a function of the controller itself.

[0054] In some embodiments of this application, such as Figure 1 As shown, the valve core of the two-way cartridge valve 73 has a throttling channel (not shown in the figure) and is equipped with damping (not shown in the figure). The throttling channel connects the oil inlet end of the two-way cartridge valve 73 and the control end of the two-way cartridge valve 73.

[0055] The valve core of the aforementioned two-way cartridge valve 73 has a throttling channel that connects the oil inlet end of the two-way cartridge valve 73 and the control end of the two-way cartridge valve 73, enabling the valve core of the two-way cartridge valve 73 to open or close quickly.

[0056] In some embodiments of this application, such as Figure 1As shown, the first directional valve 6 is a three-position four-way pilot-operated solenoid directional valve, and the pilot oil circuit of the first directional valve 6 is connected to the main return port 3.

[0057] The aforementioned first directional valve 6 is a three-position four-way pilot-operated solenoid directional valve that can accurately and reliably control the high-pressure, high-flow main oil circuit with minimal electrical cost (low power consumption, small-sized solenoid), and provides a smooth switching process and diverse neutral position functions, so as to make the action control of the mold-locking cylinder 100 more precise; the pilot oil circuit of the aforementioned first directional valve 6 is connected to the main return port 3 to provide a zero-pressure oil discharge path for the pilot oil circuit, ensuring reliable reset of the pilot valve and the main valve, and precise action.

[0058] The aforementioned first reversing valve 6 can be connected to the controller of the injection molding machine. The controller can control the valve core position and pilot pressure of the first reversing valve 6. It should be noted that the controller's control of the valve core position and pilot pressure of the first reversing valve 6 is a function of the controller itself.

[0059] In some embodiments of this application, such as Figure 1 As shown, the neutral position function of the first directional valve 6 is "O".

[0060] The neutral position function of the first directional valve 6 is "O". When the valve is in the neutral position, all oil ports are closed and the valve core is locked in the current position. It will not move due to external force, which is extremely safe and can achieve precise positioning and hold.

[0061] In some embodiments of this application, such as Figures 1 to 3 As shown, the mold switching control oil circuit board also includes a second reversing valve 8, a motor oil outlet connection port 9, and a motor oil inlet connection port 10. The second reversing valve 8 is disposed on the plate body 1. The motor oil outlet connection port 9 and the motor oil inlet connection port 10 are both disposed on the outer surface of the plate body 1. The P port of the second reversing valve 8 is connected to the main oil inlet port 2, the T port of the second reversing valve 8 is connected to the main oil return port 3, the A port of the second reversing valve 8 is connected to the motor oil outlet connection port 9, and the B port of the second reversing valve 8 is connected to the motor oil inlet connection port 10. The motor oil outlet connection port 9 and the motor oil inlet connection port 10 are used to connect to the two ports of the mold adjusting motor 200 of the injection molding machine, respectively.

[0062] The aforementioned motor oil outlet 9 and motor oil inlet 10 are respectively connected to the two ports of the mold adjustment motor 200 of the injection molding machine. The second reversing valve 8 is used to control the flow of oil to the motor oil outlet 9 or the motor oil inlet 10, so as to control the rotation direction of the mold adjustment motor 200.

[0063] In some embodiments of this application, such as Figure 1 As shown, the second directional valve 8 is a three-position four-way solenoid directional valve, with its middle position function being "O".

[0064] The aforementioned second directional valve 8 is a three-position four-way solenoid directional valve that can be connected to the controller of the injection molding machine. The controller can control the position of the valve core of the second directional valve 8 to control the rotation direction of the mold adjusting motor 200. The neutral position function of the second directional valve 8 is "O" type. When the valve is in the neutral position, all oil ports are closed, and the valve core is locked in the current position. It will not move due to external force, and the safety is extremely high. It can achieve precise positioning and hold.

[0065] The above are preferred embodiments of this application. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A high-speed, precision switching module control circuit board, characterized in that, include: plate(1); The main oil inlet (2) is located on the outer surface of the plate (1) and is used to connect with the oil outlet of the external oil supply device; The main oil return port (3) is located on the outer surface of the plate (1) and is used to connect with the oil inlet of the external oil tank; The rod cavity connection port (4) is located on the outer surface of the plate (1) and is used to communicate with the rod cavity of the external mold-locking cylinder (100); The rodless cavity connection port (5) is located on the outer surface of the plate (1) and is used to communicate with the rodless cavity of the external mold-locking cylinder (100); A first directional valve (6) is disposed on the plate (1). The P port of the first directional valve (6) is connected to the main oil inlet (2), the T port of the first directional valve (6) is connected to the main oil return port (3), the A port of the first directional valve (6) is connected to the rodless chamber connection port (5), and the B port of the first directional valve (6) is connected to the rod chamber connection port (4). Differential circuit (7), the differential circuit (7) is integrated on the plate (1), one end of the differential circuit (7) is connected to the passage between the A port of the first directional valve (6) and the rodless chamber connection port (5), and the other end of the differential circuit (7) is connected to the passage between the T port of the first directional valve (6) and the total return port (3).

2. The switching module control circuit board according to claim 1, characterized in that, The differential circuit (7) includes a check valve (71) and a throttle valve (72). The throttle valve (72) is connected in series in the passage between the T port of the first directional valve (6) and the total return port (3). The passage between the throttle valve (72) and the T port of the first directional valve (6) is connected through the check valve (71) and the passage between the A port of the first directional valve (6) and the rodless chamber connection port (5). The check valve (71) unidirectionally guides the oil from the passage between the throttle valve (72) and the T port of the first directional valve (6) to the passage between the A port of the first directional valve (6) and the rodless chamber connection port (5).

3. The switching module control circuit board according to claim 2, characterized in that, The differential circuit (7) also includes a two-way cartridge valve (73) and a switching valve (74). The oil inlet of the two-way cartridge valve (73) is connected to the T port of the first directional valve (6), and the oil outlet of the two-way cartridge valve (73) is connected to the total return port (3). The control end of the two-way cartridge valve (73) is connected to the passage between the switching valve (74), the throttle valve (72), and the total return port (3).

4. The switching module control circuit board according to claim 3, characterized in that, The switching valve (74) can be a three-position four-way solenoid directional valve. The neutral position function of the switching valve (74) is "O". The P port of the switching valve (74) is connected to the control terminal of the two-way cartridge valve (73). The A port of the switching valve (74) is connected to the passage between the throttle valve (72) and the main return port (3). The T port and the B port of the switching valve (74) are both blocked.

5. The switching module control circuit board according to claim 3, characterized in that, The valve core of the two-way cartridge valve (73) has a throttling channel and is equipped with damping. The throttling channel connects the oil inlet end of the two-way cartridge valve (73) and the control end of the two-way cartridge valve (73).

6. The switching module control circuit board according to claim 1, characterized in that, The first directional valve (6) is a three-position four-way pilot solenoid directional valve, and the pilot oil circuit of the first directional valve (6) is connected to the main return oil port (3).

7. The switching module control circuit board according to claim 6, characterized in that, The neutral position function of the first reversing valve (6) is "O".

8. The switching module control circuit board according to claim 1, characterized in that, The switching mold control oil circuit board also includes a second reversing valve (8), a motor oil outlet connection port (9), and a motor oil inlet connection port (10). The second reversing valve (8) is disposed on the plate body (1). The motor oil outlet connection port (9) and the motor oil inlet connection port (10) are both disposed on the outer surface of the plate body (1). The P port of the second reversing valve (8) is connected to the main oil inlet port (2). The T port of the second reversing valve (8) is connected to the main oil return port (3). The A port of the second reversing valve (8) is connected to the motor oil outlet connection port (9). The B port of the second reversing valve (8) is connected to the motor oil inlet connection port (10). The motor oil outlet connection port (9) and the motor oil inlet connection port (10) are used to connect to the two ports of the mold adjustment motor (200) of the injection molding machine, respectively.

9. The switching module control circuit board according to claim 8, characterized in that, The second directional valve (8) is a three-position four-way solenoid directional valve, and its position function is "O".

Images