A precision high vacuum valve for die casting system

Abstract

The present application relates to the field of vacuum valve technology, and in particular to a precision high vacuum valve for a die-casting system. It includes a first valve body and a second valve body connected to each other, and a starting valve core inserted into the first valve body and the second valve body, an exhaust valve core is movably inserted into the second valve body, a transmission assembly connected to the exhaust valve core is sleeved at the bottom of the starting valve core, an exhaust passage connected to the exhaust valve core is opened on the side of the second valve body, and a first air path, a second air path and a third air path are opened on the side of the first valve body; the second air path is connected to the bottom of the exhaust valve core, and the first air path and the third air path are used to drive the transmission assembly to move so that the exhaust valve core is opened or closed. Through different air paths, the valve body can be blown clean, closed to prevent aluminum liquid from clogging, etc., thereby increasing the service life of the vacuum valve, eliminating the need for frequent disassembly and maintenance, and improving production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum valves, and in particular to a precision high vacuum valve for a die-casting system. Background Art

[0002] High vacuum die casting is an effective method to improve the mechanical properties of parts. Vacuum die casting has the advantages of less porosity defects, high density of tissue, strong mechanical properties, etc. At present, vacuum valve is a necessary exhaust component for vacuum die casting, which is suitable for aluminum alloy die casting products with high requirements for air tightness of castings and difficult to form castings.

[0003] In the current high-pressure casting, mechanical or electrical signals are generally used to control the linear motion of the valve core through the drive structure to control the vacuum opening and closing. The drive structure usually adopts a single air path structure. When the aluminum liquid is filled at a high speed, it is easy to enter the vacuum tank valve along the exhaust channel. It is easy for aluminum foam to block the vacuum channel and the aluminum liquid to be sucked into the valve body due to poor sealing, which blocks the exhaust channel, resulting in frequent disassembly and maintenance, affecting production efficiency. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, the present application provides a precision high-vacuum valve for a die-casting system, comprising a first valve body and a second valve body connected to each other, and a starting valve core inserted into the first valve body and the second valve body, an exhaust valve core movably inserted into the second valve body, a transmission assembly connected to the exhaust valve core is sleeved at the bottom of the starting valve core, an exhaust channel connected to the exhaust valve core is opened on the side of the second valve body, and a first air path, a second air path and a third air path are opened on the side of the first valve body; the second air path is connected to the bottom of the exhaust valve core, and the first air path and the third air path are used to drive the transmission assembly to move so as to open or close the exhaust valve core.

[0005] Preferably, the transmission assembly includes a movable piston sleeved on the bottom of the starting valve core and a pressure block abutting against the top of the movable piston, the movable piston is mounted in the first valve body through a first elastic member, the edge of the movable piston is embedded in the outer periphery of the exhaust valve core, and the third air path is connected to the top of the pressure block.

[0006] Preferably, the first valve body and the second valve body are provided with a first channel, and the third gas path is connected to the top of the pressing block through the first channel.

[0007] Preferably, a transmission block is provided on the side of the movable piston away from the exhaust valve core, the edge of the movable piston is embedded in the outer periphery of the transmission block, the transmission block is installed in the first valve body through a second elastic member, and the first air path is connected to the top of the transmission block.

[0008] Preferably, the first valve body and the second valve body are provided with a second channel, and the first gas path is connected to the top of the transmission block through the second channel.

[0009] Preferably, the first valve body is provided with a groove for the bottom end of the exhaust valve core to be embedded in, and the second air path is connected to the bottom of the groove.

[0010] Preferably, the second valve body is provided with a positioning sleeve for the exhaust valve core to pass through, and a through hole communicating with the exhaust channel is formed on a side surface of the positioning sleeve.

[0011] As can be seen from the above, the following beneficial effects can be obtained by applying the present application: an exhaust valve core is movably inserted into the second valve body, a transmission assembly connected to the exhaust valve core is sleeved at the bottom of the start valve core, an air extraction channel connected to the exhaust valve core is opened on the side of the second valve body, and a first air path, a second air path and a third air path are opened on the side of the first valve body; the second air path is connected to the bottom of the exhaust valve core, and the first air path and the third air path are used to drive the transmission assembly to move so as to open or close the exhaust valve core. The valve body can be cleaned by blowing air and sealed to prevent aluminum liquid from clogging through different air paths, thereby increasing the service life of the vacuum valve, eliminating the need for frequent disassembly and maintenance, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments of the present application or the prior art are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0013] Figure 1 This is a schematic diagram of the structure of a precision high vacuum valve used in a die-casting system according to an embodiment of the present application;

[0014] Figure 2 A top view of a precision high vacuum valve used in a die-casting system according to an embodiment of the present application;

[0015] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the present application;

[0016] Figure 4 This is a schematic diagram of the disassembly of a precision high vacuum valve used in a die-casting system according to an embodiment of the present application;

[0017] Figure 5 In the embodiment of this application Figure 2 A-direction sectional view;

[0018] Figure 6 In the embodiment of this application Figure 2 B-direction cross-sectional view;

[0019] Figure 7 In the embodiment of this application Figure 2 C-section view. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Example

[0022] In order to solve the above technical problems, this embodiment provides a precision high vacuum valve for a die casting system, such as Figure 1-2 As shown, it includes a first valve body 10 and a second valve body 20 connected, and a starting valve core 30 inserted into the first valve body 10 and the second valve body 20, an exhaust valve core 40 is movably inserted into the second valve body 20, and a suction channel 41 connected to the exhaust valve core 40 is opened on the side of the second valve body 20. When the exhaust valve core 40 is opened, the suction channel 41 is connected through a vacuum machine, thereby exhausting the mold cavity. A transmission assembly 80 connected to the exhaust valve core 40 is sleeved at the bottom of the starting valve core 30, and a first air path 50, a second air path 60 and a third air path 70 are opened on the side of the first valve body 10; the second air path 60 is connected to the bottom of the exhaust valve core 40. When the die casting is completed, the second air path 60 is ventilated, and then the debris in the valve body is blown out from the valve port of the exhaust valve core 40, so as to realize the self-cleaning protection function of the valve body. When the first air path 50 and the third air path 70 are used to drive the transmission assembly 80 to move, the exhaust valve core 40 is opened or closed. During the vacuuming process of the vacuum machine, aluminum liquid is simultaneously filled into the mold cavity, and the filling pressure of the aluminum liquid pushes the start valve core 30 to move, and the start valve core 30 drives the transmission component 80 to move, and at the same time the third air circuit 70 is ventilated, so that the transmission component 80 drives the exhaust valve core 40 to move and close, so that the aluminum liquid is blocked in the valve body flow channel, and the aluminum liquid is prevented from being sucked into the valve body to cause blockage, thereby avoiding the problem of aluminum liquid entering the valve body from the valve port to cause blockage during the die casting process, and reducing the porosity defects of the finished casting. When the vacuum machine is not evacuating, the first air circuit 50 is ventilated, and the exhaust valve core 40 is driven by the transmission component 80 to move and close, so as to prevent aluminum slag from entering the valve body and causing blockage. The valve body is blown clean and sealed to prevent aluminum liquid from blocking through different air circuits, thereby increasing the service life of the vacuum valve, eliminating the need for frequent disassembly and maintenance, and improving production efficiency.

[0023] Specifically, Figure 3-4As shown, the transmission assembly 80 includes a moving piston 81 sleeved on the bottom of the start valve core 30 and a pressing block 82 abutting against the top of the moving piston 81. The moving piston 81 is mounted in the first valve body 10 through the first elastic member 84. The edge of the moving piston 81 is embedded in the outer periphery of the exhaust valve core 40, and the third gas path 70 is connected to the top of the pressing block 82. The top surface of the first valve body 10 is provided with a receiving groove for accommodating the moving piston 81 and the first elastic member 84, and the bottom of the second valve body 20 is provided with a mounting groove for inserting the pressing block 82. When the third gas path 70 is ventilated, the pressing block 82 is pressed down on the moving piston 81 under the action of air pressure, and the moving piston 81 compresses the first elastic member 84 and moves downward. At this time, the moving piston 81 drives the exhaust valve core 40 to move downward, so that the top of the exhaust valve core 40 is closed at the valve port, thereby preventing the aluminum liquid from being sucked into the valve body and causing blockage.

[0024] In the above scheme, if Figure 6 As shown, the first valve body 10 and the second valve body 20 are provided with a first channel 71, and the third gas path 70 is connected to the top of the pressing block 82 through the first channel 71. When the third gas path 70 is ventilated, the pressing block 82 is pressed down on the moving piston 81 under the action of air pressure, and the moving piston 81 drives the exhaust valve core 40 to close the valve port, thereby preventing the aluminum liquid from entering the valve body from the valve port and causing blockage during the die casting process.

[0025] Furthermore, during the vacuuming process of the vacuum machine, when the aluminum liquid is filled into the mold cavity, the filling pressure of the aluminum liquid pushes the start valve core 30 to move, and the start valve core 30 drives the transmission assembly 80 to move.

[0026] The filling kinetic energy of the aluminum liquid is used to push the starting valve core 30, and the starting valve core 30 overcomes the resistance of the first elastic member and retreats 0.5-1.0mm, so that a gap of 0.5-1.0mm is formed between the starting valve core 30 and the nozzle, and then the starting valve core 30 drives the moving piston 81 to move backward, and the moving piston 81 drives the exhaust valve core 40 to close quickly, thereby quickly closing the exhaust valve core 40 during die casting, thereby avoiding the problem of aluminum liquid entering the valve body from the valve port to cause blockage during the die casting process, and reducing the porosity defects of the finished casting.

[0027] Further, such as Figure 5 As shown, a transmission block 83 is provided on the side of the movable piston 81 away from the exhaust valve core 40, the edge of the movable piston 81 is embedded in the outer periphery of the transmission block 83, the transmission block 83 is mounted in the first valve body 10 through the second elastic member 85, and the first gas path 50 is connected to the top of the transmission block 83. When the vacuum machine is not evacuating, the first gas path 50 is ventilated, and the exhaust valve core 40 is driven by the movable piston 81 to move and close, so as to prevent aluminum slag from entering the valve body and causing blockage.

[0028] In the above scheme, if Figure 7As shown, the first valve body 10 and the second valve body 20 are provided with a second channel 51, and the first gas path 50 is connected to the top of the transmission block 83 through the second channel 51. When the first gas path 50 is ventilated, the transmission block 83 is pressed down on the moving piston 81 under the action of air pressure, and the moving piston 81 drives the exhaust valve core 40 to close the valve port, thereby preventing the aluminum liquid from entering the valve body from the valve port and causing blockage during the die casting process.

[0029] In order to realize the exhaust of the mold cavity, the first valve body 10 is provided with a groove 61 for the bottom end of the exhaust valve core 40 to be embedded, and the second air path 60 is connected to the bottom of the groove 61. Then, when the second air path 60 is ventilated and the first air path 50 and the third air path 70 are not ventilated, the exhaust valve core 40 is lifted up under the action of the bottom air pressure, and then the exhaust valve core 40 opens the valve port, and then connects to the vacuum machine through the exhaust channel 41 on the side of the second valve body 20, and the gas in the cavity is discharged from the exhaust channel 41 by exhausting air.

[0030] Furthermore, the second valve body 20 is provided with a through groove, in which a positioning sleeve 42 for the exhaust valve core 40 to pass is fixedly installed. The exhaust valve core 40 can slide in the positioning sleeve 42, and a through hole connected to the exhaust channel 41 is provided on the side of the positioning sleeve 42. When the exhaust valve core 40 is lifted and the valve port is opened, the vacuum machine connected to the exhaust channel 41 is started to work, and the air in the mold cavity is discharged through the through hole of the positioning sleeve 42 and the second air path 60.

[0031] In summary, the present application scheme has an exhaust valve core movably inserted in the second valve body, a transmission assembly connected to the exhaust valve core is sleeved at the bottom of the start valve core, an exhaust passage connected to the exhaust valve core is opened on the side of the second valve body, and a first gas path, a second gas path and a third gas path are opened on the side of the first valve body; the second gas path is connected to the bottom of the exhaust valve core, and the first gas path and the third gas path are used to drive the transmission assembly to move so as to open or close the exhaust valve core. The valve body can be cleaned by blowing air and sealed to prevent aluminum liquid from clogging through different gas paths, thereby increasing the service life of the vacuum valve, eliminating the need for frequent disassembly and maintenance, and improving production efficiency.

[0032] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A precision high vacuum valve for a die casting system, characterized in that: The invention comprises a first valve body (10) and a second valve body (20) connected to each other, and a starting valve core (30) inserted into the first valve body (10) and the second valve body (20); an exhaust valve core (40) is movably inserted into the second valve body (20); a transmission assembly (80) connected to the exhaust valve core (40) is sleeved on the bottom of the starting valve core (30); a suction channel (41) connected to the exhaust valve core (40) is opened on the side of the second valve body (20); a first air path (50), a second air path (60) and a third air path (70) are opened on the side of the first valve body (10); the second air path (60) is connected to the bottom of the exhaust valve core (40); the first air path (50) and the third air path (70) are used to drive the transmission assembly (80) to move so as to open or close the exhaust valve core (40).

2. The precision high vacuum valve for die casting system according to claim 1, characterized in that: The transmission assembly (80) comprises a movable piston (81) sleeved on the bottom of the starting valve core (30) and a pressure block (82) abutting against the top of the movable piston (81); the movable piston (81) is installed in the first valve body (10) through a first elastic member (84); the edge of the movable piston (81) is embedded in the outer periphery of the exhaust valve core (40); and the third air path (70) is connected to the top of the pressure block (82).

3. The precision high vacuum valve for die casting system according to claim 2, characterized in that: The first valve body (10) and the second valve body (20) are provided with a first channel (71), and the third gas path (70) is connected to the top of the pressing block (82) through the first channel (71).

4. The precision high vacuum valve for die casting system according to claim 2, characterized in that: A transmission block (83) is provided on a side of the movable piston (81) away from the exhaust valve core (40); an edge of the movable piston (81) is embedded in the outer periphery of the transmission block (83); the transmission block (83) is installed in the first valve body (10) via a second elastic member (85); and the first gas path (50) is connected to the top of the transmission block (83).

5. The precision high vacuum valve for die casting system according to claim 4, characterized in that: The first valve body (10) and the second valve body (20) are provided with a second channel (51), and the first gas path (50) is connected to the top of the transmission block (83) through the second channel (51).

6. The precision high vacuum valve for die casting system according to claim 2, characterized in that: The first valve body (10) is provided with a groove (61) for the bottom end of the exhaust valve core (40) to be embedded in, and the second gas path (60) is connected to the bottom of the groove (61).

7. The precision high vacuum valve for die casting system according to claim 2, characterized in that: The second valve body (20) is provided with a positioning sleeve (42) for the exhaust valve core (40) to pass through, and a through hole communicating with the exhaust channel (41) is provided on a side surface of the positioning sleeve (42).

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