CN213052635U - Vacuum-pumping sand box for lost foam casting - Google Patents
Vacuum-pumping sand box for lost foam casting Download PDFInfo
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- CN213052635U CN213052635U CN202021887467.XU CN202021887467U CN213052635U CN 213052635 U CN213052635 U CN 213052635U CN 202021887467 U CN202021887467 U CN 202021887467U CN 213052635 U CN213052635 U CN 213052635U
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- vacuum
- sand box
- box body
- evacuation
- lost foam
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Abstract
The utility model discloses a vacuum flask is used in lost foam casting, include the sand box body and establish at this internal vacuum tube of sand box, the top of sand box body is equipped with the real empty room in top, and the top of vacuum tube links to each other with the real empty room in top, the outside of sand box body is equipped with the vacuum passageway and the evacuation interface that are used for the evacuation, and the one end of vacuum passageway links to each other with the real empty room in top, and the other end at the vacuum passageway is established to the evacuation interface. This disappearance is evacuation sand box for pattern casting structural design is reasonable, and vacuum chamber sets up at the sand box top and begins the evacuation from the top, and evacuation air current direction is upwards, and it is difficult for leading to the case collapse to exhaust when doing benefit to the pouring, improve foundry goods quality.
Description
Technical Field
The utility model belongs to the technical field of the casting technique and specifically relates to a vacuum flask is used in lost foam casting.
Background
The sand box used in the existing lost foam casting production usually needs to be provided with a vacuum-pumping structure, namely a bottom-pumping type or a side-pumping type. As shown in figure 2, a plurality of vacuum tubes are arranged on the inner wall of the sand box body, the tail ends of the vacuum tubes face upwards, the lower ends of the vacuum tubes are connected with an annular tube or an integral vacuum chamber, and a vacuum interface is arranged at the bottom or the side surface and communicated with the outside. The prior vacuum-pumping sand box has the following defects: the direction of the vacuumized airflow is downward and is opposite to the direction of the molten iron rising when the sand box is used for casting, so that the gas is not beneficial to being discharged in time when the pattern is gasified; the vacuum is different at each part of the sand box, the compactness of the cavity is different, especially the compactness of the molding sand at the middle upper part is not as good as that at the lower part after the molding sand is compacted, but the upper part vacuum is attenuated to a certain extent compared with the lower part vacuum during the vacuum pumping, so that the quality is influenced and even the sand is collapsed.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model aims to solve the technical problem that a vacuum flask is used in lost foam casting is provided, it is difficult for leading to the case collapse to exhaust when doing benefit to the pouring.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the vacuum-pumping sand box for lost foam casting comprises a sand box body and a vacuum tube arranged in the sand box body, wherein a top vacuum chamber is arranged at the top of the sand box body, the top end of the vacuum tube is connected with the top vacuum chamber, a vacuum channel and a vacuum-pumping interface for vacuum pumping are arranged outside the sand box body, one end of the vacuum channel is connected with the top vacuum chamber, and the vacuum-pumping interface is arranged at the other end of the vacuum channel.
Furthermore, the top of the sand box body is provided with a step, and the upper end of the vacuum tube is provided with a bending part which is lapped on the step.
The top vacuum chamber is a circle of cavity arranged on the outer side of the top of the sand box body.
The vacuum channel is arranged on the outer wall of the sand box body.
The top of the vacuum tube is provided with a vacuum tube top interface used for being connected with the top vacuum chamber, and the top vacuum chamber is provided with a connecting port corresponding to the vacuum tube top interface.
And a vacuumizing interface connected with the lower end of the vacuum channel is positioned at the bottom of the sand box body.
Compared with the prior art, the utility model, have following advantage:
this disappearance is evacuation sand box for pattern casting structural design is reasonable, and vacuum chamber sets up at the sand box top and begins the evacuation from the top, and evacuation air current direction is upwards, and it is difficult for leading to the case collapse to exhaust when doing benefit to the pouring, improve foundry goods quality.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is the schematic view of the structure of the vacuum-pumping sand box of the present invention.
FIG. 2 is a schematic view of a prior art vacuum flask.
In the figure:
1. the sand box comprises a sand box body, 2 parts of a top vacuum chamber, 3 parts of steps, 4 parts of supports, 5 parts of vacuum tubes, 6 parts of vacuum tube top interfaces, 7 parts of vacuum channels and 8 parts of vacuumizing interfaces.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in figure 1, the vacuum-pumping sand box for lost foam casting comprises a sand box body 1 and a vacuum tube 5 arranged in the sand box body, wherein a top vacuum chamber 2 is arranged at the top of the sand box body 1, the top end of the vacuum tube is connected with the top vacuum chamber, a vacuum channel 7 and a vacuum-pumping interface 8 for vacuum pumping are arranged outside the sand box body 1, one end of the vacuum channel is connected with the top vacuum chamber, and the vacuum-pumping interface is arranged at the other end of the vacuum channel.
The top of the sand box body 1 is provided with a step 3, the upper end of the vacuum tube is provided with a bending part which is lapped on the step, so that the vacuum tube is convenient to install and cover during molding.
The top vacuum chamber 2 is a circle of cavity arranged at the outer side of the top of the sand box body; the cross section of the vacuum tube can be in a rectangular, circular or trapezoidal structure, and the utility model is shown as a rectangle in figure 1 and is used for communicating all the vacuum tubes.
The top of the vacuum tube 5 is provided with a vacuum tube top interface 6 connected with the top vacuum chamber, and the top vacuum chamber is provided with a connector corresponding to the vacuum tube top interface, so that the connection is simple and convenient.
The interior of the sand box is of a straight cylinder structure, and is not shielded by objects such as an annular vacuum tube and the like, so that the mold is conveniently placed and a part is conveniently taken out; the vacuum tubes on the box wall are fixed on the inner wall of the sand box by a support 4, and the tops of the vacuum tubes are provided with interfaces fixed by bolts and connected with openings at the tops of the vacuum chambers.
The vacuum channel is arranged on the outer wall of the sand box body, and the vacuumizing interface connected with the lower end of the vacuum channel is positioned at the bottom of the sand box body.
Preferably, a plurality of vacuum channels are arranged below the vacuum chamber along the outer wall of the box body, and the upper vacuum chamber is connected to a vacuumizing interface at the bottom of the sand box and is connected with other vacuum system pipelines; therefore, the purpose of converging the vacuum in the box at the vacuum chamber at the top of the box through the vacuum tube in the box and realizing the vacuum pumping from the top is achieved.
The utility model discloses evacuation sand box structural design is reasonable, and real empty room setting begins the evacuation at the sand box top from the top, and evacuation air current direction is upwards, and it is difficult for leading to the case of collapsing to exhaust when doing benefit to the pouring, improve the foundry goods quality.
The above-mentioned is only for the description of the preferred embodiments of the present invention, and the above-mentioned technical features can be combined at will to form a plurality of embodiments of the present invention.
The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.
Claims (6)
1. The utility model provides a vacuum flask is used in lost foam casting, includes the sand box body and establishes the vacuum tube in the sand box body, its characterized in that: the sand box comprises a sand box body and is characterized in that a top vacuum chamber is arranged at the top of the sand box body, the top end of a vacuum tube is connected with the top vacuum chamber, a vacuum channel and a vacuum pumping interface for vacuum pumping are arranged outside the sand box body, one end of the vacuum channel is connected with the top vacuum chamber, and the vacuum pumping interface is arranged at the other end of the vacuum channel.
2. The evacuated flask for lost foam casting according to claim 1, wherein: the sand box comprises a sand box body and is characterized in that a step is arranged at the top of the sand box body, and a bending part lapped on the step is arranged at the upper end of the vacuum tube.
3. The evacuated flask for lost foam casting according to claim 1, wherein: the top vacuum chamber is a circle of cavity arranged on the outer side of the top of the sand box body.
4. The evacuated flask for lost foam casting according to claim 1, wherein: the vacuum channel is arranged on the outer wall of the sand box body.
5. The evacuated flask for lost foam casting according to claim 1, wherein: the top of the vacuum tube is provided with a vacuum tube top interface used for being connected with the top vacuum chamber, and the top vacuum chamber is provided with a connecting port corresponding to the vacuum tube top interface.
6. The evacuated flask for lost foam casting according to claim 4, wherein: and a vacuumizing interface connected with the lower end of the vacuum channel is positioned at the bottom of the sand box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021887467.XU CN213052635U (en) | 2020-09-02 | 2020-09-02 | Vacuum-pumping sand box for lost foam casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021887467.XU CN213052635U (en) | 2020-09-02 | 2020-09-02 | Vacuum-pumping sand box for lost foam casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213052635U true CN213052635U (en) | 2021-04-27 |
Family
ID=75555787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021887467.XU Active CN213052635U (en) | 2020-09-02 | 2020-09-02 | Vacuum-pumping sand box for lost foam casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213052635U (en) |
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2020
- 2020-09-02 CN CN202021887467.XU patent/CN213052635U/en active Active
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