CN217315821U - Low-pressure casting structure for valve body - Google Patents
Low-pressure casting structure for valve body Download PDFInfo
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- CN217315821U CN217315821U CN202220235208.1U CN202220235208U CN217315821U CN 217315821 U CN217315821 U CN 217315821U CN 202220235208 U CN202220235208 U CN 202220235208U CN 217315821 U CN217315821 U CN 217315821U
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- valve body
- sand core
- casting
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- inorganic sand
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Abstract
The utility model discloses a valve body low-pressure casting structure, which comprises a valve body casting body, wherein a top riser is arranged in the middle of the top of the valve body casting body, and a bottom sprue is arranged in the middle of the bottom of the valve body casting body; the sand core structure is arranged in the cavity of the valve body casting body and comprises an inorganic sand core and two metal cores, the two metal cores are axially arranged in the cavity of the valve body casting body, the inorganic sand core is arranged at the position of a bearing hole of the valve body casting body, the top of the inorganic sand core extends out of the top surface of a top riser, and the top of the inorganic sand core is connected to a vacuumizing device. The utility model discloses can improve the cast yield of valve body low pressure, reduction in production cost simultaneously.
Description
Technical Field
The utility model relates to a valve body casting field especially relates to a valve body low pressure casting structure.
Background
The low-pressure casting has the advantages of good mold filling capacity, low air hole occurrence rate, good compactness, good mechanical property and the like. However, the valve body is cast by low pressure in the prior art, so that the valve body has air holes and shrinkage porosity, the reject ratio of slag holes is high, and the valve body adopts an integral sand core, so that the production cost is high.
Disclosure of Invention
For overcoming not enough among the prior art, the utility model aims to provide a valve body low pressure casting structure to improve the yield of valve body low pressure casting, reduction in production cost simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a low-pressure casting structure of a valve body comprises a valve body casting body, wherein a top riser is arranged in the middle of the top of the valve body casting body, and a bottom sprue is arranged in the middle of the bottom of the valve body casting body; the sand core structure is arranged inside the cavity of the valve body casting body and comprises an inorganic sand core and two metal cores, the two metal cores are axially arranged inside the cavity of the valve body casting body, the inorganic sand core is arranged at the position of a bearing hole of the valve body casting body, the top of the inorganic sand core extends out of the top surface of a top dead head, and the top of the inorganic sand core is connected to a vacuumizing device.
Furthermore, the bottom of the inorganic sand core is provided with a boss, and the boss is inserted into a groove formed between the two metal cores.
The utility model adopts the above technical scheme, following beneficial technological effect has:
1. the utility model adopts the structure that 2 metal loose cores are combined with the inorganic sand core, thereby reducing the usage amount of the inorganic sand core and lowering the production cost;
2. according to the characteristics of the upper and lower hot junctions of the valve body structure, the bottom hot junction is fed by a bottom sprue, and the top hot junction is fed by a top riser, so that casting shrinkage porosity caused by the upper and lower hot junctions can be eliminated;
3. the vacuum pumping is arranged at the top of the inorganic sand core, so that the air holes involved in the valve body casting caused by poor heating, air generation and exhaust of the sand core can be effectively reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments;
fig. 1 is a sectional view of the present invention.
Detailed Description
Referring to fig. 1, the utility model relates to a low-pressure casting structure for a valve body, which comprises a valve body casting body 1, a top dead head 2 arranged in the middle of the top of the valve body casting body 1, and a bottom gate 3 arranged in the middle of the bottom of the valve body casting body 1; the inside psammitolite structure that is equipped with of die cavity of valve body casting body 1, this psammitolite structure include inorganic psammitolite 4 and two metal cores 5, and two metal cores 5 set up inside the die cavity of valve body casting body 1 along the axial, the dead eye position department of valve body casting body 1 is located to inorganic psammitolite 4, and the top of inorganic psammitolite 4 extends the top surface of knockout head 2, the top of inorganic psammitolite 4 is connected to evacuating device (not shown in the figure).
Preferably, the bottom of the inorganic sand core 4 is provided with a boss which is inserted into a groove formed in the middle of the two metal cores 5, and the structure can effectively and stably combine the two metal cores 5 and the inorganic sand core 4 together, and simultaneously, the two metal cores 5 can be conveniently and subsequently drawn out.
The utility model discloses a 2 structures of 5 cooperation inorganic psammitolites of individual metal core 4 reduce the use amount of inorganic psammitolite 4, reduction in production cost.
According to the characteristics of the upper and lower hot junctions of the valve body structure, the bottom hot junction is fed by the bottom sprue 3, and the top hot junction is fed by the top riser 2, so that casting shrinkage porosity caused by the upper and lower hot junctions can be eliminated.
The vacuum air exhaust is positioned at the top of the inorganic sand core 4, so that air holes caused by poor heating, air generation and exhaust of the sand core of the valve body casting can be effectively reduced.
In addition, a structure for placing a filter screen can be arranged at the bottom pouring gate 3, so that the flow stabilization is facilitated, and the generation of slag holes on the processing surface of the valve body casting is reduced.
The practice of the present invention has been described with reference to the accompanying drawings, but the invention is not limited to the embodiments described above, which are illustrative rather than limiting, and it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (2)
1. The utility model provides a valve body low pressure casting structure which characterized in that: the valve body casting device comprises a valve body casting body, wherein a top dead head is arranged in the middle of the top of the valve body casting body, and a bottom pouring gate is arranged in the middle of the bottom of the valve body casting body; the sand core structure is arranged inside the cavity of the valve body casting body and comprises an inorganic sand core and two metal cores, the two metal cores are axially arranged inside the cavity of the valve body casting body, the inorganic sand core is arranged at the position of a bearing hole of the valve body casting body, the top of the inorganic sand core extends out of the top surface of a top dead head, and the top of the inorganic sand core is connected to a vacuumizing device.
2. A valve body low pressure casting structure as claimed in claim 1, wherein: and a boss is arranged at the bottom of the inorganic sand core and is inserted into a groove formed between the two metal cores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220235208.1U CN217315821U (en) | 2022-01-12 | 2022-01-12 | Low-pressure casting structure for valve body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220235208.1U CN217315821U (en) | 2022-01-12 | 2022-01-12 | Low-pressure casting structure for valve body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217315821U true CN217315821U (en) | 2022-08-30 |
Family
ID=82995413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220235208.1U Active CN217315821U (en) | 2022-01-12 | 2022-01-12 | Low-pressure casting structure for valve body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217315821U (en) |
-
2022
- 2022-01-12 CN CN202220235208.1U patent/CN217315821U/en active Active
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