CN104690234A - Vacuum casting sand box - Google Patents
Vacuum casting sand box Download PDFInfo
- Publication number
- CN104690234A CN104690234A CN201410496680.0A CN201410496680A CN104690234A CN 104690234 A CN104690234 A CN 104690234A CN 201410496680 A CN201410496680 A CN 201410496680A CN 104690234 A CN104690234 A CN 104690234A
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- Prior art keywords
- sandbox
- wall
- sand
- casting
- sand box
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/01—Flasks; Accessories therefor for vacuum-sealed moulding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a vacuum casting sand box. The vacuum casting sand box comprises a sand box bottom and a sand box wall, wherein a bottom air channel is uniformly arranged at the lower part of the sand box bottom and is communicated with a bottom air suction pipe arranged at the outer side of the sand box, the sand box wall comprises an inner wall and an outer wall, and side air channels are uniformly arranged between the inner wall and the outer wall, and are communicated with a side air suction pipe arranged at the outer side of the sand box, and air suction holes communicated with the bottom air channel and the side air channels are arranged on the inner walls of the sand box bottom and the sand box wall, and a sand prevention mesh is arranged on the air suction holes; and an air inlet steel pipe is inserted into a square sand layer in the sand box corresponding to a part of a vacuum lost foam. Air enters the steel pipe without the help of another device, and therefore the cost is greatly reduced, the adaptability is high, the solidification of casting hot spots is accelerated, the riser feeding amount is reduced, and the utilization rate of molten iron is improved; and the vacuum casting box has remarkable advantages and effect.
Description
Technical field
The present invention relates to a kind of dry sand for founding casing with vacuum casting sandbox.
Background technology
Many equipment components all must adopt foundry goods, and the usage range of foundry goods widely.
General foundry goods all passes through sandbox casting, and common sandbox is open type, from cooling forming after pouring metal melt, the components interior density of such casting is even not, easily occur pore, the defect such as loose, the resistance to pressure of foundry goods is poor, and total quality is not high enough.
At present, founding casing with vacuum technology is widely used, but in founding casing with vacuum process, tamping of dry sand is the key of founding casing with vacuum, dry sand is when filling ram-jolt, if ram-jolt power is inadequate, or fills unreal, when casting, just easily cause crush, casting part out has also just become waste product.For this situation, the sandbox adopted in the founding casing with vacuum formative method of patent No. large-scaled complex castings disclosed in the Chinese patent of 200910074893.3 solves above-mentioned problem substantially, but this sandbox is the casing of square or cuboid, for some irregularly-shaped castings, particularly foundry goods side has the irregularly-shaped castings of side direction cross-drilled hole, dry sand in side opening is difficult to tamp, often there is the situation of crush, cross-drilled hole on foundry goods is filled by molten metal, cast defect ware, add cost.
In addition, the casting sandbox that general casting producer uses when sand casting mostly at present is welded unit or foundry goods, often due to sandbox insufficient rigidity in ironcasting especially nodular iron casting is produced, cooling procedure Sand escapes from case band portion by cast iron expansion effect, make the graphitization expansion of cast iron can not get effectively utilizing and causing the defects such as Shrinkage Porosity, foundry goods time serious, will be made to scrap.Owing to being subject to the existing restriction of casting frock and the limit of manufacturing cost, above-mentioned situation is caused often to occur in actual production process.
How to improve above-mentioned situation, the graphitization expansion of cast iron is effectively utilized, and has economy, demonstrate it and determining in foundry technology process and improving the importance in casting quality, this is the problem of pendulum in face of casting producer.
Summary of the invention
The present invention is directed to the above-mentioned technical issues that need to address, provide one large for founding casing with vacuum, side opening ram-jolt pressure, the casting sandbox that ram-jolt is effective.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of vacuum pressing and casting sandbox, comprise at the bottom of sandbox, sandbox wall, below at the bottom of described sandbox, end airway is evenly set, end airway is communicated with the end exhaust tube outside sandbox, sandbox wall is made up of inner and outer wall, between inner and outer wall, side airway is evenly set, side airway is communicated with the side exhaust tube outside sandbox, at the bottom of sandbox, the inwall of sandbox wall is all arranged the aspirating hole be communicated with end airway, side airway, aspirating hole arranges sand control screens, and in sandbox, a square layer of sand of corresponding lost foam local is inserted with air intake steel pipe.
The top molding sand layer of the corresponding lost foam local of downstream port of described air intake steel pipe, or the centre type layer of sand of corresponding lost foam local, or the peripheral type layer of sand of corresponding lost foam local.
Described sandbox wall is up big and down small inverted trapezoidal, at the bottom of sandbox and the inner face of sandbox body that forms of sandbox wall be inverted trapezoidal shape.
At the bottom of sandbox and sandbox wall formed angle be more than or equal to 100 degree and be less than or equal to 120 degree.
For the flexible connection that cooperatively interacts or be fixedly connected with at the bottom of described sandbox and between sandbox wall.
At the bottom of described sandbox and sandbox wall formed drum-shaped structure.
Described sandbox wall outside is also provided with hanger.
Also comprise the reinforcing body being arranged on sandbox wall outside.
Described reinforcing body is two pieces of clamping plate relatively put, and clamping plate are provided with steam vent, lays bolt hole in clamping plate gabarit, passes through bolt-connection between outside clamping plate and sandbox wall.
Beneficial effect:
The first, a kind of vacuum pressing and casting sandbox of the present invention, sandbox is designed to landing shape, at the bottom of sandbox and sandbox wall be certain obtuse angle, like this, sandbox top area increase, sand increases, when sand ram-jolt, the meeting of sand gravity under the effect of sandbox wall produces inside horizontal component, thus makes sand increase pressure to the side opening of foundry goods, sand in foundry goods side opening is tamped, greatly reduces defect ware.
The second, when the angle formed at the bottom of sandbox wall and sandbox is between 100 degree to 120 degree, the degree of tamping of the dry sand in the hole of level can be made better.
Three, a square layer of sand of the present invention corresponding lost foam local in sandbox is inserted with air intake steel pipe, during use, before cast, by the shutoff of air intake steel pipe air inlet, open air intake steel pipe air inlet after cast, seal at sandbox, while lost foam is vacuumized, cold air enters into the molding sand of foundry goods local thermal center one side through air intake steel pipe air inlet, first to the molding sand cooling around foundry goods thermal center, thus replaces external chill to realize the quick cooled and solidified of foundry goods local thermal center.This casting sandbox of the present invention, air intake steel pipe is adopted to replace external chill, not only prepare easy, existing steel pipe all can be selected, and steel pipe air intake is without the need to another oil (gas) filling device, greatly reduce cost, and strong adaptability, foundry goods thermal center consecutive solidification is accelerated, and decreases cap mouth feeding amount, improve iron liquid utilization rate, there is significant advantage and effect.
Four, when being easier to devan for during flexible connection at the bottom of sandbox and between sandbox wall.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of vacuum pressing and casting sandbox of the present invention embodiment one;
Wherein, 1 bleed, and hang pressure thick stick; 2, airway; 3, upper exhaust tube; 4, side breather pipe; 5, sand control screens; 6, side exhaust tube; 7, end exhaust tube; 8, end airway.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
The first embodiment of a kind of vacuum pressing and casting sandbox of the present invention as shown in Figure 1, comprise at the bottom of sandbox, sandbox wall, below at the bottom of described sandbox, end airway 8 is evenly set, end airway 8 is communicated with the end exhaust tube 7 outside sandbox, sandbox wall is made up of inner and outer wall, between inner and outer wall, side airway 4 is evenly set, side airway 4 is communicated with the side exhaust tube 6 outside sandbox, at the bottom of sandbox, the inwall of sandbox wall is all arranged and end airway 8, the aspirating hole that side airway 4 is communicated with, aspirating hole is arranged sand control screens 5, in sandbox, a square layer of sand of corresponding lost foam local is inserted with air intake steel pipe.The top molding sand layer of the corresponding lost foam local of downstream port of described air intake steel pipe, or the centre type layer of sand of corresponding lost foam local, or the peripheral type layer of sand of corresponding lost foam local.In this embodiment, at the bottom of described sandbox and sandbox wall form drum-shaped structure, this kind of structure stressed more even.
The second structure of a kind of vacuum pressing and casting sandbox of the present invention, comprise at the bottom of sandbox, sandbox wall, below at the bottom of described sandbox, end airway 8 is evenly set, end airway 8 is communicated with the end exhaust tube 7 outside sandbox, sandbox wall is made up of inner and outer wall, between inner and outer wall, side airway 4 is evenly set, side airway 4 is communicated with the side exhaust tube 6 outside sandbox, at the bottom of sandbox, the inwall of sandbox wall is all arranged and end airway 8, the aspirating hole that side airway 4 is communicated with, aspirating hole is arranged sand control screens 5, in sandbox, a square layer of sand of corresponding lost foam local is inserted with air intake steel pipe.The top molding sand layer of the corresponding lost foam local of downstream port of described air intake steel pipe, the suitable for reading of air intake steel pipe is provided with capping, and the top cooling range of molding sand layer to molding sand of the corresponding lost foam local of end opening looks the internal diameter of air intake steel pipe and the position distance of end opening distance lost foam local.
The third structure of a kind of vacuum pressing and casting sandbox of the present invention, the difference of itself and embodiment two only: on the architecture basics of embodiment two, the molding sand layer of the center of the corresponding lost foam local of end opening of wherein said air intake steel pipe.
4th kind of structure of a kind of vacuum pressing and casting sandbox of the present invention, the difference of itself and embodiment two is only: on the architecture basics of embodiment two, the end opening of wherein said air intake steel pipe connects multiple points of mouths, the molding sand layer of the multiple points of corresponding peripheries in lost foam local of mouth or the centre type layer of sand of corresponding lost foam local, or the peripheral type layer of sand of corresponding lost foam local.
The second structure of the present invention, the third structure and the 4th kind of these three kinds of structures of structure, described sandbox wall is up big and down small inverted trapezoidal, at the bottom of sandbox and the inner face of sandbox body that forms of sandbox wall be inverted trapezoidal shape.Sandbox is designed to landing shape, at the bottom of sandbox and sandbox wall be certain obtuse angle, like this, sandbox top area increases, and sand increases, when sand ram-jolt, the meeting of sand gravity under the effect of sandbox wall produces inside horizontal component, thus make sand increase pressure to the side opening of foundry goods, sand in foundry goods side opening is tamped, greatly reduces defect ware.
Further optimization, at the bottom of sandbox and sandbox wall formed angle be more than or equal to 100 degree and be less than or equal to 120 degree.When the angle formed at the bottom of sandbox wall and sandbox is between 100 degree to 120 degree, the degree of tamping of the dry sand in the hole of level can be made better.
Further preferred version as above two kinds of embodiments:
Further, at the bottom of described sandbox and between sandbox wall for the flexible connection that cooperatively interacts or be fixedly connected with.
Further, described sandbox wall outside is also provided with hanger.
Further, the reinforcing body being arranged on sandbox wall outside is also comprised.
Further, described reinforcing body is two pieces of clamping plate relatively put, and clamping plate are provided with steam vent, lays bolt hole in clamping plate gabarit, passes through bolt-connection between outside clamping plate and sandbox wall.
Claims (9)
1. a vacuum pressing and casting sandbox, comprise at the bottom of sandbox, sandbox wall, end airway (8) is evenly set below at the bottom of described sandbox, end airway (8) is communicated with the end exhaust tube (7) outside sandbox, sandbox wall is made up of inner and outer wall, side airway (4) is evenly set between inner and outer wall, side airway (4) is communicated with the side exhaust tube (6) outside sandbox, at the bottom of sandbox, the inwall of sandbox wall is all arranged and end airway (8), the aspirating hole that side airway (4) is communicated with, aspirating hole is arranged sand control screens (5), it is characterized in that, in sandbox, a square layer of sand of corresponding lost foam local is inserted with air intake steel pipe.
2. a kind of vacuum pressing and casting sandbox according to claim 1 and 2, it is characterized in that, the top molding sand layer of the corresponding lost foam local of downstream port of described air intake steel pipe, or the centre type layer of sand of corresponding lost foam local, or the peripheral type layer of sand of corresponding lost foam local.
3. a kind of vacuum pressing and casting sandbox according to claim 1 and 2, is characterized in that, described sandbox wall is up big and down small inverted trapezoidal, at the bottom of sandbox and the inner face of sandbox body that forms of sandbox wall be inverted trapezoidal shape.
4. a kind of vacuum pressing and casting sandbox according to claim 1 and 2, is characterized in that, at the bottom of sandbox and sandbox wall formed angle be more than or equal to 100 degree and be less than or equal to 120 degree.
5. a kind of vacuum pressing and casting sandbox according to claim 1 and 2, is characterized in that, for the flexible connection that cooperatively interacts or be fixedly connected with at the bottom of described sandbox and between sandbox wall.
6. a kind of vacuum pressing and casting sandbox according to claim 1 and 2, is characterized in that, at the bottom of described sandbox and sandbox wall formed drum-shaped structure.
7. a kind of vacuum pressing and casting sandbox according to claim 1 and 2, is characterized in that, described sandbox wall outside is also provided with hanger.
8. a kind of vacuum pressing and casting sandbox according to claim 1, is characterized in that, also comprise the reinforcing body being arranged on sandbox wall outside.
9. a kind of vacuum pressing and casting sandbox according to claim 8, is characterized in that, described reinforcing body is two pieces of clamping plate relatively put, and clamping plate are provided with steam vent, lays bolt hole in clamping plate gabarit, passes through bolt-connection between outside clamping plate and sandbox wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410496680.0A CN104690234A (en) | 2014-09-25 | 2014-09-25 | Vacuum casting sand box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410496680.0A CN104690234A (en) | 2014-09-25 | 2014-09-25 | Vacuum casting sand box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104690234A true CN104690234A (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410496680.0A Withdrawn CN104690234A (en) | 2014-09-25 | 2014-09-25 | Vacuum casting sand box |
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| Country | Link |
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| CN (1) | CN104690234A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855481A (en) * | 2016-06-13 | 2016-08-17 | 吴江市液铸液压件铸造有限公司 | Casting sand box |
| CN105929864A (en) * | 2016-05-31 | 2016-09-07 | 共享装备股份有限公司 | Large-sized complex casting expendable pattern casting process vacuum degree automatic adjustment system and method |
| CN111842805A (en) * | 2020-08-20 | 2020-10-30 | 扬州市瑞晟机械铸造有限公司 | Sand box for casting |
| CN113770315A (en) * | 2021-07-23 | 2021-12-10 | 新泰市鑫晟铸造有限公司 | Sand leakage prevention device for sand box in V-process casting |
Citations (6)
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| CN201257500Y (en) * | 2008-10-09 | 2009-06-17 | 上海宝钢铸造有限公司 | Casting sandbox stiffening clamping plate |
| CN201455197U (en) * | 2009-07-17 | 2010-05-12 | 泊头市青峰机械有限公司 | Sand box for vacuum lost foam large-sized complex casting |
| CN202343879U (en) * | 2011-11-08 | 2012-07-25 | 泰州市美鑫铸造有限公司 | Special sand box for air exhausting passage cast in V-method |
| CN202527668U (en) * | 2012-04-27 | 2012-11-14 | 山东蒙凌工程机械股份有限公司 | V-process casting pressure-equalizing sand box |
| CN203227804U (en) * | 2013-05-07 | 2013-10-09 | 泊头市青峰机械有限公司 | Casting flask |
| CN103495708A (en) * | 2013-07-25 | 2014-01-08 | 华远善 | Casting sandbox capable of reducing riser feeding |
-
2014
- 2014-09-25 CN CN201410496680.0A patent/CN104690234A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201257500Y (en) * | 2008-10-09 | 2009-06-17 | 上海宝钢铸造有限公司 | Casting sandbox stiffening clamping plate |
| CN201455197U (en) * | 2009-07-17 | 2010-05-12 | 泊头市青峰机械有限公司 | Sand box for vacuum lost foam large-sized complex casting |
| CN202343879U (en) * | 2011-11-08 | 2012-07-25 | 泰州市美鑫铸造有限公司 | Special sand box for air exhausting passage cast in V-method |
| CN202527668U (en) * | 2012-04-27 | 2012-11-14 | 山东蒙凌工程机械股份有限公司 | V-process casting pressure-equalizing sand box |
| CN203227804U (en) * | 2013-05-07 | 2013-10-09 | 泊头市青峰机械有限公司 | Casting flask |
| CN103495708A (en) * | 2013-07-25 | 2014-01-08 | 华远善 | Casting sandbox capable of reducing riser feeding |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929864A (en) * | 2016-05-31 | 2016-09-07 | 共享装备股份有限公司 | Large-sized complex casting expendable pattern casting process vacuum degree automatic adjustment system and method |
| CN105855481A (en) * | 2016-06-13 | 2016-08-17 | 吴江市液铸液压件铸造有限公司 | Casting sand box |
| CN111842805A (en) * | 2020-08-20 | 2020-10-30 | 扬州市瑞晟机械铸造有限公司 | Sand box for casting |
| CN113770315A (en) * | 2021-07-23 | 2021-12-10 | 新泰市鑫晟铸造有限公司 | Sand leakage prevention device for sand box in V-process casting |
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| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150610 |