CN212398062U - High vacuum die-casting mould hydraulic vacuum valve - Google Patents
High vacuum die-casting mould hydraulic vacuum valve Download PDFInfo
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- CN212398062U CN212398062U CN202020877732.XU CN202020877732U CN212398062U CN 212398062 U CN212398062 U CN 212398062U CN 202020877732 U CN202020877732 U CN 202020877732U CN 212398062 U CN212398062 U CN 212398062U
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Abstract
The utility model belongs to the technical field of die casting, and relates to a high vacuum die-casting die hydraulic vacuum valve, which comprises a die and a hydraulic driver, wherein the die comprises a movable die plate and a fixed die plate, a die cavity and a vacuum air suction port capable of communicating with the die cavity are reserved in the middle of the movable die plate and the fixed die plate after being mutually spliced, and a vacuum valve seat capable of being cut off by a vacuum valve core is arranged between the vacuum air suction port and the die cavity; the hydraulic driver comprises a hydraulic oil cylinder which is connected with an opening oil circuit and a closing oil circuit, the vacuum valve core extends and retracts in the hydraulic oil cylinder, the vacuum valve seat is provided with a through hole, the upper portion of the vacuum valve core is communicated with the die cavity, the upper portion of the vacuum valve core penetrates through the through hole, and the vacuum suction port is located in the direction perpendicular to the through hole. The mechanism not only adopts a sensitive vacuum valve to control the air suction on-off of the die-casting die, but also has large air suction area, high air suction efficiency, unaffected concentricity, easy installation and reliable sealing property.
Description
Technical Field
The utility model relates to a die-casting technical field, in particular to high vacuum die-casting mould hydraulic vacuum valve.
Background
The vacuum metal die-casting technology is now widely applied to the fields of new energy automobiles, 5G communication, improvement of traditional automobile castings, electronics, households, aviation and the like, and the vacuum die-casting technology is used for pumping air in a cavity before cooling and forming molten metal, reducing injection specific pressure, reducing porosity, improving product density and enhancing mechanical performance. Vacuum valves are a very important component in vacuum die casting processes.
The mechanism of the existing vacuum valve is shown in figure 1: the valve mainly comprises a die moving mold valve body flow passage A1, a locking valve core A2 and a pressure valve core A3. In the high-pressure die casting process, by utilizing a metal liquid thrust principle, metal liquid passes through the flow channel A1 of the movable die valve body at a high speed, the liquid flowing speed is reduced by utilizing the bending resistance of the flow channel, the movement energy of the metal liquid is gradually weakened by impacting a curve, the metal liquid can be pushed to flow forwards by the metal liquid continuously filled and injected from the back, enough force is reserved to impact and push the pressurized valve core A3, and the lever principle is utilized to drive the locking valve core A2 to be closed. However, the prior art has the following problems:
the prior vacuum valve has clearance fit between the pressurized valve core and the locking valve core and the valve sleeve, such as the control device mentioned in CN 108580833A. The temperature of the molten metal reaches above 650 ℃ in the normal production process. The metal liquid can easily enter the overlarge gap, so that the valve core can not be normally closed, and the valve core is blocked or damaged; the clearance is too small, the valve core and the locking valve core can not normally slide under the influence of temperature, and the valve core and the valve sleeve are easy to block or damage.
Secondly, in the die-casting process, a vacuum valve is required to be used for pumping out gas within 0.5-1 s before the molten metal reaches the die cavity, and the response closing time of the vacuum valve needs to be accurately controlled. However, the design of the vacuum valve and the matching between the vacuum valve and the mold are quite complicated, and when the vacuum valve is damaged or blocked, the replacement and cleaning time is also quite long, thereby causing the waste of production components. The cost of the vacuum valve is also very expensive, which also increases the use cost of production.
The design of the vacuum pumping area of the existing vacuum valve is also very limited, the time in the die-casting process is very short, the vacuumizing effect is seriously influenced when the design limit of the sectional area is limited, the air flow is very small in conductance through the limited sectional area in a negative pressure state, the pressure damage is very large, and the ideal vacuum pressure in the production process cannot be reached.
There is a need for improved control schemes to avoid the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a high vacuum die casting mould hydraulic vacuum valve can improve the efficiency of breathing in and the reliability of die-casting.
The utility model discloses a following technical scheme realizes above-mentioned purpose: a high vacuum die-casting mould hydraulic vacuum valve comprises a mould and a hydraulic driver, wherein the mould comprises a movable mould plate and a fixed mould plate, a mould cavity and a vacuum air suction port capable of communicating the mould cavity are reserved in the middle of the movable mould plate and the fixed mould plate after the movable mould plate and the fixed mould plate are mutually spliced, and a vacuum valve seat capable of being turned off by a vacuum valve core is arranged between the vacuum air suction port and the mould cavity; the hydraulic driver comprises a hydraulic oil cylinder which is connected with an opening oil circuit and a closing oil circuit, the vacuum valve core extends and retracts in the hydraulic oil cylinder, the vacuum valve seat is provided with a through hole, the upper portion of the vacuum valve core is communicated with the die cavity, the upper portion of the vacuum valve core penetrates through the through hole, and the vacuum suction port is located in the direction perpendicular to the through hole.
Specifically, the inner diameter of the lower part of the through hole is matched with the outer diameter of the vacuum valve core, and the upper part of the through hole is enlarged.
Specifically, the top end of the vacuum valve core is reduced.
Specifically, the hydraulic oil cylinder is fixed on a fixing plate, and a limit switch capable of limiting the opening position of the vacuum valve core is further arranged on the fixing plate.
Adopt above-mentioned technical scheme, the utility model discloses technical scheme's beneficial effect is:
the mechanism not only adopts a sensitive vacuum valve to control the air suction on-off of the die-casting die, but also has large air suction area, high air suction efficiency, unaffected concentricity, easy installation and reliable sealing property.
Drawings
FIG. 1 is a block diagram of a prior art die casting mold;
FIG. 2 is a schematic structural diagram of a hydraulic vacuum valve of the high vacuum die-casting mold according to the embodiment.
The figures in the drawings represent:
a1-a movable mould valve body flow passage, A2-a locking valve core and A3-a pressure valve core;
1-mould, 11-movable mould plate, 12-fixed mould plate, 13-mould cavity, 14-vacuum air suction port and 15-vacuum valve seat;
2-hydraulic driver, 21-vacuum valve core, 22-hydraulic oil cylinder, 23-opening oil circuit, 231-first electromagnetic valve, 24-closing oil circuit, 241-second electromagnetic valve, 25-fixing plate and 26-limit switch.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example (b):
as shown in fig. 2, the hydraulic vacuum valve for the high vacuum die-casting mold of the present invention comprises a mold 1 and a hydraulic driver 2; the mould 1 comprises a movable mould plate 11 and a fixed mould plate 12, a mould cavity 13 and a vacuum air suction port 14 capable of communicating with the mould cavity 13 are reserved in the middle of the movable mould plate 11 and the fixed mould plate 12 after being spliced, and a vacuum valve seat 15 capable of being turned off by a vacuum valve core 21 is arranged between the vacuum air suction port 14 and the mould cavity 13; the hydraulic driver 2 comprises a hydraulic oil cylinder 22 connected with an opening oil way 23 and a closing oil way 24, and the vacuum valve core 21 extends and retracts in the hydraulic oil cylinder 22; the vacuum valve seat 15 has a through hole (not labeled) communicating with the cavity 13 at the upper side, the upper portion of the vacuum valve core 21 passes through the through hole, and the vacuum suction port 14 is located in the direction perpendicular to the through hole. When the vacuum valve is opened, the vacuum valve core 21 can not block the air channel in the vacuum valve seat 15, so the passing area in the vacuum valve seat 15 in the mechanism is the sectional area of the through hole, and compared with the ventilation area of a common vacuum valve, the ventilation area can be more than 2 times, and the air suction efficiency is improved. Because the vacuum valve core 21 is withdrawn from the vacuum valve core 21 and is tightly matched with the through hole, the concentricity is not affected during opening and closing, the installation is easy, and the sealing performance is reliable.
As shown in fig. 2, the lower inner diameter of the through hole matches the outer diameter of the vacuum valve core 21, and the upper portion of the through hole is enlarged. The expansion structure of the through hole enables air to easily pass through the vacuum valve seat 15 to reach the vacuum air suction port 14, air suction resistance is reduced, and air suction sensitivity is guaranteed.
As shown in fig. 2, the tip of the vacuum valve core 21 is narrowed. So that the vacuum valve cartridge 21 is more easily inserted into the through-hole.
As shown in fig. 2, the hydraulic cylinder 22 is fixed to a fixing plate 25, and the fixing plate 25 is further provided with a limit switch 26 capable of limiting the open position of the vacuum valve element 21. The limit switch 26 can keep the position after the vacuum valve core 21 is completely opened, and the passing area of the vacuum valve seat 15 is prevented from being influenced when the vacuum valve core 21 is disturbed, so that the air suction efficiency is further influenced.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.
Claims (4)
1. A high vacuum die-casting mould hydraulic vacuum valve comprises a mould and a hydraulic driver, wherein the mould comprises a movable mould plate and a fixed mould plate, a mould cavity and a vacuum air suction port capable of communicating the mould cavity are reserved in the middle of the movable mould plate and the fixed mould plate after the movable mould plate and the fixed mould plate are mutually spliced, and a vacuum valve seat capable of being turned off by a vacuum valve core is arranged between the vacuum air suction port and the mould cavity; the method is characterized in that: the hydraulic driver comprises a hydraulic oil cylinder which is connected with an opening oil circuit and a closing oil circuit, the vacuum valve core extends and retracts in the hydraulic oil cylinder, the vacuum valve seat is provided with a through hole, the upper portion of the vacuum valve core is communicated with the die cavity, the upper portion of the vacuum valve core penetrates through the through hole, and the vacuum suction port is located in the direction perpendicular to the through hole.
2. The high vacuum die casting mold hydraulic vacuum valve of claim 1, characterized in that: the inner diameter of the lower part of the through hole is matched with the outer diameter of the vacuum valve core, and the upper part of the through hole is enlarged.
3. The high vacuum die casting mold hydraulic vacuum valve of claim 1, characterized in that: the top end of the vacuum valve core is shrunk.
4. The high vacuum die casting mold hydraulic vacuum valve of claim 1, characterized in that: the hydraulic oil cylinder is fixed on a fixing plate, and a limit switch capable of limiting the opening position of the vacuum valve core is further arranged on the fixing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020877732.XU CN212398062U (en) | 2020-05-22 | 2020-05-22 | High vacuum die-casting mould hydraulic vacuum valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020877732.XU CN212398062U (en) | 2020-05-22 | 2020-05-22 | High vacuum die-casting mould hydraulic vacuum valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212398062U true CN212398062U (en) | 2021-01-26 |
Family
ID=74402921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020877732.XU Active CN212398062U (en) | 2020-05-22 | 2020-05-22 | High vacuum die-casting mould hydraulic vacuum valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212398062U (en) |
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2020
- 2020-05-22 CN CN202020877732.XU patent/CN212398062U/en active Active
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