CN207900142U - The mandril exhaust structure of casting molds core box - Google Patents
The mandril exhaust structure of casting molds core box Download PDFInfo
- Publication number
- CN207900142U CN207900142U CN201820296623.1U CN201820296623U CN207900142U CN 207900142 U CN207900142 U CN 207900142U CN 201820296623 U CN201820296623 U CN 201820296623U CN 207900142 U CN207900142 U CN 207900142U
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- CN
- China
- Prior art keywords
- mandril
- core box
- stepped hole
- casting molds
- wall
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of mandril exhaust structures of casting molds core box, belong to casting technology field, are designed to solve the problems, such as that core box gas vent is easy to block in the prior art.The mandril exhaust structure of the utility model casting molds core box includes core box, and multiple stepped holes are opened up on core box, and stepped hole is less than the aperture of the second end far from sand core close to the aperture of the first end of sand core；A mandril is provided in each stepped hole, the maximum between mandril outer wall and the first end inner wall of stepped hole is smaller than the outer diameter of sand grains used.The mandril exhaust structure of the utility model casting molds core box effectively blocks sand grains in the case where not influencing exhaust and enters in gas vent, and smooth in exhaust will not block gas vent.
Description
Technical field
The utility model is related to casting technology field more particularly to a kind of mandril exhaust structures of casting molds core box.
Background technology
It needs to use mold in casting processing technology, manufacture mold then needs first to manufacture sand core, and sand core is then needed by interior
The core box that portion is pre-formed with setting shape is prepared to process.
It needs to heat in the manufacturing process of sand core, leads to the gas expansion in core box, need to be vented in time.Existing core
Box structure is typically provided with gas vent, is equipped with venting plug in gas vent, is exhausted by venting plug.Rear sand is used for a long time
Grain is easily accessible in gas vent, to cause exhaust hole plug, is caused degassing function to fail, is caused product sand core insatiable hunger occur
Full, loose and other issues.
Utility model content
The purpose of this utility model is that proposing a kind of smooth in exhaust, casting molds core box that gas vent will not be blocked
Mandril exhaust structure.
For this purpose, the utility model uses following technical scheme：
A kind of mandril exhaust structure of casting molds core box, including core box, open up multiple stepped holes on the core box,
The stepped hole is less than the aperture of the second end far from sand core close to the aperture of the first end of sand core；It is set in each stepped hole
It is equipped with a mandril, the maximum between the mandril outer wall and the first end inner wall of the stepped hole is smaller than sand used
The outer diameter of grain.
In particular, all the outer end of the mandril is linked together by baffle.
Further, the baffle is parallel to the outer surface of the core box.
In particular, the distance between the step surface of the stepped hole and the first end C are more than the step of the stepped hole
The distance between face and the second end.
Further, distance C is 15 millimeters to 25 millimeters.
In particular, when the mandril and the coaxial stepped hole, described the of the mandril outer wall and the stepped hole
The spacing A of one end inner wall is less than 0.2 millimeter.
In particular, when the mandril and the coaxial stepped hole, described the of the mandril outer wall and the stepped hole
The spacing B of two end inner walls is 0.4 millimeter to 0.6 millimeter.
In particular, the stepped hole is rounded on the cross section of the mandril direction of motion.
In particular, stepped hole spaced set on the core box.
In particular, the upper surface of the stepped hole is in slope shape, and it is higher than close to the edge of the mandril side and is connected to
Side on the second end inner wall.
The gas vent of the mandril exhaust structure of the utility model casting molds core box is stepped hole and mandril outer wall and platform
Maximum between the first end inner wall of rank hole is smaller than the outer diameter of sand grains used, is effectively blocked in the case where not influencing exhaust
Sand grains enters in gas vent, smooth in exhaust, will not block gas vent.Stepped hole can stop that foreign matter enters the first end of stepped hole,
It further avoids blocking gas vent.
Description of the drawings
Fig. 1 is the sectional view of the mandril exhaust structure for the mould core box that specific embodiment of the present invention provides.
In figure：
1, core box；2, stepped hole；3, mandril；4, baffle；21, first end；22, second end.
Specific implementation mode
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
The utility model discloses a kind of mandril exhaust structure of casting molds core box.As shown in Figure 1, the mould core box
Mandril exhaust structure includes core box 1, multiple stepped holes 2 is opened up on core box 1, stepped hole 2 is close to the hole of the first end 21 of sand core
Diameter is less than the aperture of the second end 22 far from sand core；It is provided with a mandril 3,3 outer wall of mandril and stepped hole in each stepped hole 2
Maximum between 2 21 inner wall of first end is smaller than the outer diameter of sand grains used.
When pressure is more than certain numerical value in core box 1, high pressure gas can along 3 outer wall of mandril and stepped hole 2 inner wall it
Between gap blowout.Maximum between 3 outer wall of mandril and 21 inner wall of first end of stepped hole 2 is smaller than the outer of sand grains used
Diameter has avoided sand grains from entering in stepped hole 2 with high pressure gas, and exhaust is more smooth, will not block gas vent (stepped hole 2).
The aperture of second end 22 far from sand core is more than stepped hole 2 close to the aperture of the first end 21 of sand core, improves capacity, and work as
Diameter be less than sand grains outer diameter used impurity with high pressure gas between 21 inner wall of 3 outer wall of mandril and 2 first end of stepped hole
Gap blowout after, in 3 outer wall of mandril and wind speed reduces between 2 22 inner wall of second end of stepped hole, then impurity can be fallen after rise, be passed through
The setting of stepped hole 2 has stopped these impurity and has turned again at the first end 21 of stepped hole 2, further avoids blocking gas vent.
In order to avoid there is sundries to fall into gas vent, the outer end of whole mandrils 3 is linked together by baffle 4.Preferably,
Baffle 4 is parallel to the outer surface of core box 1, and the clean and tidy of gas vent can be preferably protected while not influencing exhaust.
The distance between the step surface of stepped hole 2 and first end 21 C are more than between the step surface and second end 22 of stepped hole 2
Distance.Specifically, distance C is 15 millimeters to 25 millimeters, preferably 20 millimeters.
When mandril 3 and coaxial stepped hole 2,3 outer wall of mandril and the spacing A of 21 inner wall of first end of stepped hole 2 are less than 0.2
Millimeter.It it is 0.4 millimeter in view of sand grains general diameter, so when mandril 3 deviates because of external force central axes, the mandril 3 of stepped hole 2
When the inner wall side of outer wall and stepped hole 2 sticks together, the maximum between 21 inner wall of first end of 3 outer wall of mandril and stepped hole 2
Spacing is still less than the outer diameter of sand grains used, and sand grains is avoided to be poured in gas vent with high pressure gas.
When mandril 3 and coaxial stepped hole 2, the spacing B of 3 outer wall of mandril and 22 inner wall of second end of stepped hole 2 is 0.4 milli
Rice is to 0.6 millimeter, and preferably 0.5 millimeter, exhaust effect is more preferable.
For stepped hole 2 in rounded, the simple processing on the cross section of 3 direction of motion of mandril, exhaust is quickly fast.Step
The spaced set on core box 1 of hole 2, is further simplified processing technology.
The upper surface of stepped hole 2 is in slope shape, and is higher than close to the edge of 3 side of mandril and is connected on 22 inner wall of second end
Side.It can tumble, avoid along the direction tilted away from mandril 3 when there is impurity to fall on the upper surface of stepped hole 2
These impurity are fallen at the first end 21 of stepped hole 2.
Note that the technical principle that above are only the preferred embodiment of the utility model and used.Those skilled in the art
It will be appreciated that the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various
Significantly change, readjust and substitutes without departing from the scope of protection of the utility model.Therefore, although by implementing above
Example is described in further detail the utility model, but the utility model is not limited only to above example, is not taking off
Can also include other more equivalent embodiments in the case of conceiving from the utility model, and the scope of the utility model is by institute
Attached right determines.
Claims (10)
1. a kind of mandril exhaust structure of casting molds core box, including core box (1), which is characterized in that on the core box (1)
Multiple stepped holes (2) are opened up, the stepped hole (2) is less than the second end far from sand core close to the aperture of the first end (21) of sand core
(22) aperture；A mandril (3), mandril (3) outer wall and the stepped hole are provided in each stepped hole (2)
(2) the maximum between the first end (21) inner wall is smaller than the outer diameter of sand grains used.
2. the mandril exhaust structure of casting molds core box according to claim 1, which is characterized in that all mandrils
(3) outer end is linked together by baffle (4).
3. the mandril exhaust structure of casting molds core box according to claim 2, which is characterized in that the baffle (4)
It is parallel to the outer surface of the core box (1).
4. the mandril exhaust structure of casting molds core box according to claim 1, which is characterized in that the stepped hole
(2) the distance between step surface and the first end (21) C are more than the step surface of the stepped hole (2) and the second end
The distance between (22).
5. the mandril exhaust structure of casting molds core box according to claim 4, which is characterized in that distance C is 15 millis
Rice is to 25 millimeters.
6. the mandril exhaust structure of casting molds core box according to any one of claim 1 to 5, which is characterized in that
When the mandril (3) and the coaxial stepped hole (2), the first end of mandril (3) outer wall and the stepped hole (2)
(21) the spacing A of inner wall is less than 0.2 millimeter.
7. according to the mandril exhaust structure of the casting molds core box described in any one of claim 1 to 5, which is characterized in that when
When the mandril (3) and the coaxial stepped hole (2), the second end of mandril (3) outer wall and the stepped hole (2)
(22) the spacing B of inner wall is 0.4 millimeter to 0.6 millimeter.
8. according to the mandril exhaust structure of the casting molds core box described in any one of claim 1 to 5, which is characterized in that institute
Stepped hole (2) is stated rounded on the cross section of the mandril (3) direction of motion.
9. according to the mandril exhaust structure of the casting molds core box described in any one of claim 1 to 5, which is characterized in that institute
State stepped hole (2) spaced set on the core box (1).
10. according to the mandril exhaust structure of the casting molds core box described in any one of claim 1 to 5, which is characterized in that institute
The upper surface for stating stepped hole (2) is in slope shape, and is higher than close to the edge of the mandril (3) side and is connected to the second end
(22) side on inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820296623.1U CN207900142U (en) | 2018-03-02 | 2018-03-02 | The mandril exhaust structure of casting molds core box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820296623.1U CN207900142U (en) | 2018-03-02 | 2018-03-02 | The mandril exhaust structure of casting molds core box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207900142U true CN207900142U (en) | 2018-09-25 |
Family
ID=63557749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820296623.1U Expired - Fee Related CN207900142U (en) | 2018-03-02 | 2018-03-02 | The mandril exhaust structure of casting molds core box |
Country Status (1)
| Country | Link |
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| CN (1) | CN207900142U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039001A (en) * | 2019-05-30 | 2019-07-23 | 广西玉柴机器股份有限公司 | A kind of method and structure casting the anti-air inlet of upper core box gas vent |
-
2018
- 2018-03-02 CN CN201820296623.1U patent/CN207900142U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039001A (en) * | 2019-05-30 | 2019-07-23 | 广西玉柴机器股份有限公司 | A kind of method and structure casting the anti-air inlet of upper core box gas vent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180925 Termination date: 20210302 |