CN109014050A - Band orifice casting method - Google Patents
Band orifice casting method Download PDFInfo
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- CN109014050A CN109014050A CN201810972200.1A CN201810972200A CN109014050A CN 109014050 A CN109014050 A CN 109014050A CN 201810972200 A CN201810972200 A CN 201810972200A CN 109014050 A CN109014050 A CN 109014050A
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- model
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- sandbox
- coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
Abstract
The present invention belongs to lost-foam casting method with orifice casting method；It is proposed a kind of lost-foam casting method suitable for casting 100~240 feather weight large pieces；Casting step of the invention is successively are as follows: production bubbles model, production model cluster, coating coating, vanning, casting, release negative pressure and cleaning, angle is 15 ° to 30 ° between model lower surface and molding sand plane when the present invention cases, model cluster column structure angle with horizontal plane is not less than 5 °, it is subnormal ambient inside sandbox before being poured, atmospheric pressure value is -0.050Mpa to -0.055Mpa, and the present invention is suitable for the lost foam casting of 30 to 240 feather weight casting.
Description
Technical field
The present invention relates to band orifice casting methods, belong to lost foam casting field.
Background technique
Casting large-scale casting is very high to model needs.Using different models, casting method is also different.Traditional method is
It is cast using follr sand, i.e., model is first carried out into external mold, then dried, place sand core, mould assembling, casting, cleaning polishing.Using this
Kind conventional method, although energy casting large-scale casting, large labor intensity is taken time and effort, and casting quality is unstable: bright and clean
Degree do not reach requirement, it is easily-deformable make it is in irregular shape, also tend to overweight, energy consumption is high, at high cost.
Lost foam casting domestic development is very swift and violent, and lost foam casting has time saving and energy saving, any surface finish, casting quality steady
Fixed feature is widely liked by client and casting manufacturer.But once casting workpiece volume mass it is larger there is with
Lower problem:
One, since casting figure is larger, corresponding bubbles model space is also big, structure is complicated, casting rate and iron when casting
Liquid setting rate does not catch up with bubbles model gasification rate, and molding sand in sandbox is be easy to cause to collapse, and causes casting deformation even complete
It scraps.
Two, since heavy castings space is big, structure is complicated, it is frequently present of molding sand when leading to bury sand and does not fill up model gap
The case where, especially there is the casting of horizontal tube, model cluster shows as horizontal column, and molding sand slides from fitting column, in model
Column least significant end forms gap, and casting deformation is caused even to be scrapped completely.
Summary of the invention
To overcome above-mentioned technological deficiency, the present invention proposes a kind of lost foam casting suitable for especially lateral aperture with holes
Method.
To realize the above-mentioned technical purpose, the present invention provides technical solution are as follows: band orifice casting method includes the following steps:
The first step makes bubbles model；Bubbles model is made according to design requirement, and is provided on the bubbles model and prevents from becoming
The foam reinforcing rib of shape；
Second step makes model cluster；Using model be adhesively fixed tooling by bubbles model bonding be spliced into model cluster,
Third step, coating coating；The model cluster surface carries out coating three times and coats；Each coating coating thickness is 0.3~
0.5mm, each coating coating drying 8~12 hours, drying temperature is 45~55 DEG C；
4th step, vanning；Whether pretrip inspection plain jolter and the operation of upper sand system are normal, check vacuum screen with the presence or absence of broken
Damage, corrosion, aging and clogging；
Into sandbox plus sand, guarantee bottom mold thickness are not less than 100mm；Then plain jolter is run 22 seconds, and molding sand in sandbox is shaken
It strikes off in fact,
Model cluster is placed on the molding sand in sandbox, the angle between the model cluster lower surface and molding sand is 15 °~30 °,
And model cluster column structure angle with horizontal plane is not less than 5 °,
Several permeability cells are placed in model cluster side in sandbox vertically, continue the gaza into sandbox, guarantee eating for each face of model
Sand amount is not less than 50mm, and 30~100kg cast top mold thickness cannot be less than 150mm, 100~240kg cast top mold thickness
It cannot be less than 200mm,
During adding sand, plain jolter operation 4 times, each run 22 seconds,
The molding sand surface paving plastic film in sandbox, and on film plus one layer of protection sand, the protection sand with a thickness of 30~
50mm, and model cluster sprue horn mouth height shakes out 10~15mm of face,
5th step, casting；Pressure gauge is plugged in sandbox before being poured, sandbox is connected and takes out negative pressure sebific duct, 2~3 points before pouring practice
Clock opens negative pressure pump, by adjusting relief valve and pressure regulator valve, vacuum table reading value is made to meet casting initial request, while observing negative
Whether pressure is steady,
When starting casting, cast iron temperature are as follows: 1460~1480 DEG C, cast steel pouring temperature are as follows: 1580~1600 DEG C, vacuum table
Numerical value is 0.050~0.055Mpa；；
6th step discharges negative pressure；After casting, 20 minutes negative pressure retention times solidified to iron liquid, discharged negative pressure；
7th step, cleaning；After casting parts thermal insulation 3 hours, then mould turnover, fall part, sand throwing, go coating protection layer, polishing dead head, go
Except extra reinforcing rib structure.
In the binning process, molding sand temperature is lower than 50 DEG C.
Screwhole position on the model cluster is screwed into bolt, and when vanning, bolt head is located inside molding sand.
The molding sand uses nice foundry sand.
Compared with the prior art, the invention has the beneficial effects that:
One, the present invention according to casting workpiece quality, from 100 to 240 kilograms, adjust sandbox in negative pressure -0.050Mpa to -
0.055Mpa, and adjustment model and 15 ° to 30 ° of angle of horizontal plane, can prevent molding sand from collapsing and be underfilled with sandbox with molding sand
It happens.
Two, bolt is screwed into mold by the present invention in advance, avoids the case where molding sand enters diebolt hole, casting complete
Afterwards, because bolt fusing point is higher, there is apparent line of demarcation between bolt and casting workpiece, can be back-outed bolt by spanner.
Three, model cluster column structure angle with horizontal plane is not less than 5 °, convenient for molding sand below side filling column structure
Gap keeps the internal surface of hole structure with orifice of casting well-balanced, and surface is smooth.
Specific embodiment
The present invention will be described in detail below:
Embodiment 1
Band orifice casting method, includes the following steps:
The first step makes bubbles model；Bubbles model is made according to design requirement, and is provided on the bubbles model and prevents from becoming
The foam reinforcing rib of shape；
Second step makes model cluster；Using model be adhesively fixed tooling by bubbles model bonding be spliced into model cluster,
Third step, coating coating；The model cluster surface carries out coating three times and coats；Each coating coating thickness is 0.3~
0.5mm, each coating coating drying 8~12 hours, drying temperature is 45~55 DEG C；
4th step, vanning；Whether pretrip inspection plain jolter and the operation of upper sand system are normal, check vacuum screen with the presence or absence of broken
Damage, corrosion, aging and clogging；
Into sandbox plus sand, guarantee bottom mold thickness are not less than 100mm；Then plain jolter is run 22 seconds, and molding sand in sandbox is shaken
It strikes off in fact,
Model cluster is placed on the molding sand in sandbox, the angle between the model cluster lower surface and molding sand is 15 °~20 °,
And model cluster column structure angle with horizontal plane is not less than 5 °,
Several permeability cells are placed in model cluster side in sandbox vertically, continue the gaza into sandbox, guarantee eating for each face of model
Sand amount is not less than 50mm, and 30~100kg cast top mold thickness cannot be less than 150mm, 100~240kg cast top mold thickness
It cannot be less than 200mm,
During adding sand, plain jolter operation 4 times, each run 22 seconds,
The molding sand surface paving plastic film in sandbox, and on film plus one layer of protection sand, the protection sand with a thickness of 30~
50mm, and model cluster sprue horn mouth height shakes out 10~15mm of face,
5th step, casting；Pressure gauge is plugged in sandbox before being poured, sandbox is connected and takes out negative pressure sebific duct, 2~3 points before pouring practice
Clock opens negative pressure pump, by adjusting relief valve and pressure regulator valve, vacuum table reading value is made to meet casting initial request, while observing negative
Whether pressure is steady,
When starting casting, cast iron temperature are as follows: 1460~1480 DEG C, cast steel pouring temperature are as follows: 1580~1600 DEG C, vacuum table
Numerical value is 0.050~0.055Mpa；；
6th step discharges negative pressure；After casting, 20 minutes negative pressure retention times solidified to iron liquid, discharged negative pressure；
7th step, cleaning；After casting parts thermal insulation 3 hours, then mould turnover, fall part, sand throwing, go coating protection layer, polishing dead head, go
Except extra reinforcing rib structure.
In the binning process, molding sand temperature is lower than 50 DEG C.
Screwhole position on the model cluster is screwed into bolt, and when vanning, bolt head is located inside molding sand.
The molding sand uses nice foundry sand.
Embodiment 2
Band orifice casting method, includes the following steps:
The first step makes bubbles model；Bubbles model is made according to design requirement, and is provided on the bubbles model and prevents from becoming
The foam reinforcing rib of shape；
Second step makes model cluster；Using model be adhesively fixed tooling by bubbles model bonding be spliced into model cluster,
Third step, coating coating；The model cluster surface carries out coating three times and coats；Each coating coating thickness is 0.3~
0.5mm, each coating coating drying 8~12 hours, drying temperature is 45~55 DEG C；
4th step, vanning；Whether pretrip inspection plain jolter and the operation of upper sand system are normal, check vacuum screen with the presence or absence of broken
Damage, corrosion, aging and clogging；
Into sandbox plus sand, guarantee bottom mold thickness are not less than 100mm；Then plain jolter is run 22 seconds, and molding sand in sandbox is shaken
It strikes off in fact,
Model cluster is placed on the molding sand in sandbox, the angle between the model cluster lower surface and molding sand is 25 °~30 °,
And model cluster column structure angle with horizontal plane is not less than 5 °,
Several permeability cells are placed in model cluster side in sandbox vertically, continue the gaza into sandbox, guarantee eating for each face of model
Sand amount is not less than 50mm, and 30~100kg cast top mold thickness cannot be less than 150mm, 100~240kg cast top mold thickness
It cannot be less than 200mm,
During adding sand, plain jolter operation 4 times, each run 22 seconds,
The molding sand surface paving plastic film in sandbox, and on film plus one layer of protection sand, the protection sand with a thickness of 30~
50mm, and model cluster sprue horn mouth height shakes out 10~15mm of face,
5th step, casting；Pressure gauge is plugged in sandbox before being poured, sandbox is connected and takes out negative pressure sebific duct, 2~3 points before pouring practice
Clock opens negative pressure pump, by adjusting relief valve and pressure regulator valve, vacuum table reading value is made to meet casting initial request, while observing negative
Whether pressure is steady,
When starting casting, cast iron temperature are as follows: 1460~1480 DEG C, cast steel pouring temperature are as follows: 1580~1600 DEG C, vacuum table
Numerical value is 0.050~0.055Mpa；；
6th step discharges negative pressure；After casting, 20 minutes negative pressure retention times solidified to iron liquid, discharged negative pressure；
7th step, cleaning；After casting parts thermal insulation 3 hours, then mould turnover, fall part, sand throwing, go coating protection layer, polishing dead head, go
Except extra reinforcing rib structure.
In the binning process, molding sand temperature is lower than 50 DEG C.
Screwhole position on the model cluster is screwed into bolt, and when vanning, bolt head is located inside molding sand.
The molding sand uses nice foundry sand.
Above embodiment is merely exemplary to illustrate the principle of the present invention and its effect, and is not intended to limit the present invention.For
Person skilled in the art all without departing from the spirit and scope of the present invention, modifies above-described embodiment or is improved.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by tool usually intellectual in all act technical fields
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (4)
1. band orifice casting method, it is characterised in that include the following steps:
The first step makes bubbles model；Bubbles model is made according to design requirement, and is provided on the bubbles model and prevents from becoming
The foam reinforcing rib of shape；
Second step makes model cluster；Using model be adhesively fixed tooling by bubbles model bonding be spliced into model cluster,
Third step, coating coating；The model cluster surface carries out coating three times and coats；Each coating coating thickness is 0.3~
0.5mm, each coating coating drying 8~12 hours, drying temperature is 45~55 DEG C；
4th step, vanning；Whether pretrip inspection plain jolter and the operation of upper sand system are normal, check vacuum screen with the presence or absence of broken
Damage, corrosion, aging and clogging；
Into sandbox plus sand, guarantee bottom mold thickness are not less than 100mm；Then plain jolter is run 22 seconds, and molding sand in sandbox is shaken
It strikes off in fact,
Model cluster is placed on the molding sand in sandbox, the angle between the model cluster lower surface and molding sand is 15 °~30 °,
And model cluster column structure angle with horizontal plane is not less than 5 °,
Several permeability cells are placed in model cluster side in sandbox vertically, continue the gaza into sandbox, guarantee eating for each face of model
Sand amount is not less than 50mm, and 30~100kg cast top mold thickness cannot be less than 150mm, 100~240kg cast top mold thickness
It cannot be less than 200mm,
During adding sand, plain jolter operation 4 times, each run 22 seconds,
The molding sand surface paving plastic film in sandbox, and on film plus one layer of protection sand, the protection sand with a thickness of 30~
50mm, and model cluster sprue horn mouth height shakes out 10~15mm of face,
5th step, casting；Pressure gauge is plugged in sandbox before being poured, sandbox is connected and takes out negative pressure sebific duct, 2~3 points before pouring practice
Clock opens negative pressure pump, by adjusting relief valve and pressure regulator valve, vacuum table reading value is made to meet casting initial request, while observing negative
Whether pressure is steady,
When starting casting, cast iron temperature are as follows: 1460~1480 DEG C, cast steel pouring temperature are as follows: 1580~1600 DEG C, vacuum table
Numerical value is 0.050~0.055Mpa；；
6th step discharges negative pressure；After casting, 20 minutes negative pressure retention times solidified to iron liquid, discharged negative pressure；
7th step, cleaning；After casting parts thermal insulation 3 hours, then mould turnover, fall part, sand throwing, go coating protection layer, polishing dead head, go
Except extra reinforcing rib structure.
2. band orifice casting method according to claim 1, it is characterised in that: in the binning process, molding sand temperature is lower than
50℃。
3. band orifice casting method according to claim 1 or claim 2, it is characterised in that: the screwhole position on the model cluster is twisted
Enter bolt, when vanning, bolt head is located inside molding sand.
4. band orifice casting method according to claim 1 or claim 2, it is characterised in that: the molding sand uses nice foundry sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810972200.1A CN109014050A (en) | 2018-08-24 | 2018-08-24 | Band orifice casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810972200.1A CN109014050A (en) | 2018-08-24 | 2018-08-24 | Band orifice casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109014050A true CN109014050A (en) | 2018-12-18 |
Family
ID=64628320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810972200.1A Pending CN109014050A (en) | 2018-08-24 | 2018-08-24 | Band orifice casting method |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115592072A (en) * | 2022-12-13 | 2023-01-13 | 衡水中裕铁信装备工程有限公司（Cn） | Composite casting method of hinge beam casting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493414A (en) * | 2002-10-28 | 2004-05-05 | 王玉和 | Method of casting loading machine large speed changing box body using vanishing mould |
| CN201415255Y (en) * | 2009-06-26 | 2010-03-03 | 河南省兴阳机械制造有限公司 | Casting and forming device for internal combustion engine body |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
| CN105618680A (en) * | 2016-01-22 | 2016-06-01 | 常州市常协柴油机机体有限公司 | Full mold casting technique for diesel engine cylinder body |
| CN205309227U (en) * | 2015-12-05 | 2016-06-15 | 重庆强鑫机械制造有限公司 | Disappearance mould adds sand device |
-
2018
- 2018-08-24 CN CN201810972200.1A patent/CN109014050A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493414A (en) * | 2002-10-28 | 2004-05-05 | 王玉和 | Method of casting loading machine large speed changing box body using vanishing mould |
| CN201415255Y (en) * | 2009-06-26 | 2010-03-03 | 河南省兴阳机械制造有限公司 | Casting and forming device for internal combustion engine body |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
| CN205309227U (en) * | 2015-12-05 | 2016-06-15 | 重庆强鑫机械制造有限公司 | Disappearance mould adds sand device |
| CN105618680A (en) * | 2016-01-22 | 2016-06-01 | 常州市常协柴油机机体有限公司 | Full mold casting technique for diesel engine cylinder body |
Non-Patent Citations (1)
| Title |
|---|
| 魏啟金: "汽车外覆盖件模具铸钢镶件消失模铸造工艺研究及应用", 《第十届中国铸造协会年会》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115592072A (en) * | 2022-12-13 | 2023-01-13 | 衡水中裕铁信装备工程有限公司（Cn） | Composite casting method of hinge beam casting |
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| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181218 |
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| WD01 | Invention patent application deemed withdrawn after publication |