CN108262449A - A kind of method that hot box makes forming graphite chill - Google Patents
A kind of method that hot box makes forming graphite chill Download PDFInfo
- Publication number
- CN108262449A CN108262449A CN201810183573.0A CN201810183573A CN108262449A CN 108262449 A CN108262449 A CN 108262449A CN 201810183573 A CN201810183573 A CN 201810183573A CN 108262449 A CN108262449 A CN 108262449A
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- CN
- China
- Prior art keywords
- graphite
- chill
- hot
- sand
- hot box
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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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Abstract
The invention discloses a kind of methods that hot box makes forming graphite chill, using graphite precoated sand as coremaking material, by the contoured chill mould processing of casting Technology Design into hot core box mould, using hot-box core making process, forming graphite chill germule is obtained, is toasted using abundant curing, cooling finishing obtains forming graphite chill finished product.The production method is simple, production efficiency is high, effect is good, solve the cumbersome production process of casting contoured chill, it is with short production cycle, it effectively prevent casting bonding, stomata casting flaw, reduce production cost, casting yield and production efficiency are improved, is easy to industrialized production, has a vast market prospect.
Description
Technical field
The invention belongs to machine casting fields, and in particular to a kind of method that hot box makes forming graphite chill.
Background technology
In the casting process of spheroidal graphite cast-iron and steel-casting, since the solidification shrinkage of molten metal is larger, crystal grain gap is difficult
Abundant feeding is obtained, so easily generating shrinkage porosity defect of contraction cavity on the thick big thermal center of casting and isolated lug.It is set in casting technique
Timing needs, using external chill control casting solidification sequence, to reduce modulus at thermal center, enhance the feeding capacity and effect of riser,
Ensure that casting quality reaches shrinkage porosite class requirement.The design feature of automobile turbocharger turbine shell product is produced according to us,
Casting structure is complex, in single, double runner three-dimension curved surface streamline construction, several kilograms to tens kilograms of quality, volute major wall
Thick 4-5mm, and wall thickness became uneven, thermal center lug is more, and casting quality requirement is high, is not allow for any casting flaw, material
Mostly middle high silicon molybdenum ductile iron, high-Ni-Cr cast iron and heat resisting steel, the solidification shrinkage of material is larger, and Feeding channel is narrow, and casting process is set
Meter needs several piece contoured chill and multiple insulated feeders, just can guarantee casting quality, reaches and quality requirement is owed in client.Therefore,
In current large batch of production, need the cast iron contoured chill of a large amount of multi items and be equipped with special making teams and groups to expire
Foot production needs.The contoured chill of a large amount of multi items is made, needs cumbersome casting process, it is necessary first to make molding chill
Tool and production template after cast production, reach the use quality requirement of contoured chill after peeling.So make contoured chill
Production cycle is longer, needs to be equipped with a large amount of human and material resources, and wastes serious, production cost height.Graphite chilling block is also used at present
As chill material, chill effect is better than cast iron chill, and casting is not likely to produce bonding, chill stomata casting flaw.But it needs
It to be had made to order to professional production producer, particularly forming graphite curved surface chill needs numerically-controlled machine tool to be process, and production cost is high.Cause
This is needed according to production and technical quality requirement, selects graphite chilling block as the optimal selection in casting Technology Design.
It is coremaking material, it can be achieved that the graphite of arbitrary shape using graphite precoated sand for this purpose, using hot box process technology
Contoured chill, and the production is simple and convenient, production cost is relatively low.
Invention content
A kind of hot box the invention aims to overcome the deficiencies in the prior art is provided and makes forming graphite chill
Method.
In order to achieve the above objectives, the technical solution adopted in the present invention is：A kind of hot box makes forming graphite chill
Method using graphite precoated sand as making material, by the contoured chill mould processing of casting Technology Design into hot core box mould, uses
Hot box manufacture craft obtains forming graphite chill germule, is toasted using abundant curing, that cooling finishing obtains forming graphite is cold
Iron finished product.
Preferably, the graphite precoated sand is with graphite sand（Artificial graphite electrode powder）For roughing sand material, the graphite overlay film
The granularity of sand is 70/140 mesh, and the fixation carbon content of the graphite sand is more than 95%.
Preferably, hot box manufacture craft parameter is：250 DEG C -300 DEG C of solidification temperature, shooting time：2-4S, during curing
Between 60-90s；
Preferably, forming graphite chill germule need fully curing baking, cooling, cleaning finishing obtain forming graphite chill into
Product, 250 DEG C -300 DEG C of baking temperature, baking time 1-2 hours.
The graphite precoated sand is by the development and production of Ke Hua Holding Co., Ltd..
Preferably, a kind of method that hot box makes forming graphite chill, is as follows：
(1) by the contoured chill mould processing of casting Technology Design into hot core box mould；
(2) graphite precoated sand is added in the sand hopper of hot box core-making machine, and hot core box mould is heated to 250-300 DEG C；
(3) sand is penetrated in molding, penetrates sand compressed air pressure as 0.5-0.6MPa, shooting time 2-4s passes through the work of compressed air
With by the precoated sand consolidation in hot box；
(4) hardening cure, solidification temperature control is at 250-300 DEG C, curing time control 60-90S；
(5) graphite chilling block core is taken out in die sinking, obtains graphite chilling block germule；
(6) by step, (5) graphite chilling block germule, fully curing baking, cooling are cleared up（250 DEG C -300 DEG C of baking temperature, baking time
1-2 hours）Obtain forming graphite chill finished product.
The beneficial effects of the invention are as follows：
By the use of graphite precoated sand as hot box process material, graphite sand is as coremaking roughing sand material, the life of forming graphite chill
Produce efficient, effect is good, and performance is stablized, and solves the cumbersome production process of casting contoured chill, with short production cycle, effectively anti-
Only casting bonding, stomata casting flaw, reduce production cost, and preparation process is simple, is easy to industrialized production, have wide
Market prospects.
Specific embodiment
With reference to embodiment, the invention will be further described.Following embodiment is only used for clearly illustrating this hair
Bright technical solution, and be not intended to limit the protection scope of the present invention and limit the scope of the invention.
Embodiment 1
(1) by the A contoured chills mould processing of casting Technology Design into hot core box mould；
(2) graphite precoated sand is added in the sand hopper of hot box core-making machine, and hot core box mould is heated to 250 DEG C；
(3) sand is penetrated in molding, penetrates sand compressed air pressure as 0.5MPa, shooting time 2s, will be hot by the effect of compressed air
Precoated sand consolidation in core box；
(4) hardening cure, solidification temperature control is at 250 DEG C, curing time control 90S；
(5) graphite chilling block core is taken out in die sinking, obtains graphite chilling block germule；
(6), by step (5) graphite chilling block germule, by fully curing baking, cooling is cleared up（250 DEG C of baking temperature, baking time 2
Hour）Obtain forming graphite chill finished product.
Embodiment 2
(1) by the B contoured chills mould processing of casting Technology Design into hot core box mould；
(2) graphite precoated sand is added in the sand hopper of hot box core-making machine, and hot core box mould is heated to, 280 DEG C；
(3) sand is penetrated in molding, penetrates sand compressed air pressure as 0.6MPa, shooting time 3s, will be hot by the effect of compressed air
Precoated sand consolidation in core box；
(4) hardening cure, solidification temperature control is at 280 DEG C, curing time control 80S；
(5) graphite chilling block core is taken out in die sinking, obtains graphite chilling block germule；
(6), by step (5) graphite chilling block germule, by fully curing baking, cooling is cleared up（280 DEG C of baking temperature, baking time
1.5 hour）Obtain forming graphite chill finished product.
Embodiment 3
(1) by the C contoured chills mould processing of casting Technology Design into hot core box mould；
(2) graphite precoated sand is added in the sand hopper of hot box core-making machine, and hot core box mould is heated to, 300 DEG C；
(3) sand is penetrated in molding, penetrates sand compressed air pressure as 0.5MPa, shooting time 4s, will be hot by the effect of compressed air
Precoated sand consolidation in core box；
(4) hardening cure, solidification temperature control is at 300 DEG C, curing time control 60S；
(5) graphite chilling block core is taken out in die sinking, obtains graphite chilling block germule；
(6), by step (5) graphite chilling block germule, by fully curing baking, cooling is cleared up（300 DEG C of baking temperature, baking time 1
Hour）Obtain forming graphite chill finished product.
Embodiment 4
(1) by the D contoured chills mould processing of casting Technology Design into hot core box mould；
(2) graphite precoated sand is added in the sand hopper of hot box core-making machine, and hot core box mould is heated to, 280 DEG C；
(3) sand is penetrated in molding, penetrates sand compressed air pressure as 0.55MPa, shooting time 3s, will be hot by the effect of compressed air
Precoated sand consolidation in core box；
(4) hardening cure, solidification temperature control is at 280 DEG C, curing time control 70S；
(5) graphite chilling block core is taken out in die sinking, obtains graphite chilling block germule；
(6), by step (5) graphite chilling block germule, by fully curing baking, cooling is cleared up（280 DEG C of baking temperature, baking time
1.5 hour）Obtain forming graphite chill finished product.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of method that hot box makes forming graphite chill, it is characterised in that:Using graphite precoated sand as making material, will cast
The contoured chill mould processing of technological design is made into hot core box mould, using hot box manufacture craft, obtains forming graphite chill
Germule is toasted using abundant curing, cooling finishing obtains forming graphite chill finished product.
2. the method that a kind of hot box according to claim 1 makes forming graphite chill, it is characterised in that:The graphite
Precoated sand is using graphite sand as roughing sand material, and the granularity of the graphite precoated sand is 70/140 mesh, and the fixed carbon of the graphite sand contains
Amount is more than 95%.
3. the method that a kind of hot box according to claim 1 makes forming graphite chill, it is characterised in that:Hot box system
It is as technological parameter：250 DEG C -300 DEG C of solidification temperature, shooting time：2-4S, hardening time 60-90s.
4. the method that a kind of hot box according to claim 1 makes forming graphite chill, it is characterised in that：The graphite
Contoured chill germule is needed by fully curing baking, cooling cleaning obtains forming graphite chill finished product, and 250 DEG C of baking temperature-
300 DEG C, baking time 1-2 hours.
5. the method that a kind of hot box according to claim 1 makes forming graphite chill, which is characterized in that including as follows
Forming step：
(1) by the contoured chill mould processing of casting Technology Design into hot core box mould；
(2) graphite precoated sand is added in the sand hopper of hot box core-making machine, and hot core box mould is heated to 250-300 DEG C；
(3) sand is penetrated in molding, penetrates sand compressed air pressure as 0.5-0.6MPa, shooting time 2-4s passes through the work of compressed air
With by the precoated sand consolidation in hot box；
(4) hardening cure, solidification temperature control is at 250-300 DEG C, curing time control 60-90S；
(5) graphite chilling block core is taken out in die sinking, obtains graphite chilling block germule；
(6), by step (5) graphite chilling block germule, by fully curing baking, cooling is cleared up（250 DEG C -300 DEG C of baking temperature, baking
Time 1-2 hour）Obtain forming graphite chill finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183573.0A CN108262449A (en) | 2018-03-06 | 2018-03-06 | A kind of method that hot box makes forming graphite chill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183573.0A CN108262449A (en) | 2018-03-06 | 2018-03-06 | A kind of method that hot box makes forming graphite chill |
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| CN108262449A true CN108262449A (en) | 2018-07-10 |
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| CN201810183573.0A Pending CN108262449A (en) | 2018-03-06 | 2018-03-06 | A kind of method that hot box makes forming graphite chill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147188A (en) * | 2021-04-08 | 2022-03-08 | 山东昊方联合铸造有限公司 | Manufacturing process of tubular thick and long sand core |
| CN114799054A (en) * | 2022-04-18 | 2022-07-29 | 共享装备股份有限公司 | Chilling block for 3D printing sand mold and using method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06114540A (en) * | 1992-10-05 | 1994-04-26 | Hitachi Metals Ltd | Casting method using sand core |
| US20100139884A1 (en) * | 2006-11-10 | 2010-06-10 | Nemak Dillingen Gmbh | Casting mould for casting a cast part and use of such a casting mould |
| CN101774001A (en) * | 2009-12-29 | 2010-07-14 | 江苏一汽铸造股份有限公司 | Preparation method of graphite chilling block |
| CN102847907A (en) * | 2012-09-28 | 2013-01-02 | 贵州安吉航空精密铸造有限责任公司 | Disposable chilling block and manufacturing method thereof |
| CN106396679A (en) * | 2016-08-30 | 2017-02-15 | 江苏汽铸造股份有限公司 | Graphite sand cold iron and preparation method thereof |
| CN107838391A (en) * | 2017-11-10 | 2018-03-27 | 西峡县众德汽车部件有限公司 | The preparation method of chill and chill |
-
2018
- 2018-03-06 CN CN201810183573.0A patent/CN108262449A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06114540A (en) * | 1992-10-05 | 1994-04-26 | Hitachi Metals Ltd | Casting method using sand core |
| US20100139884A1 (en) * | 2006-11-10 | 2010-06-10 | Nemak Dillingen Gmbh | Casting mould for casting a cast part and use of such a casting mould |
| CN101774001A (en) * | 2009-12-29 | 2010-07-14 | 江苏一汽铸造股份有限公司 | Preparation method of graphite chilling block |
| CN102847907A (en) * | 2012-09-28 | 2013-01-02 | 贵州安吉航空精密铸造有限责任公司 | Disposable chilling block and manufacturing method thereof |
| CN106396679A (en) * | 2016-08-30 | 2017-02-15 | 江苏汽铸造股份有限公司 | Graphite sand cold iron and preparation method thereof |
| CN107838391A (en) * | 2017-11-10 | 2018-03-27 | 西峡县众德汽车部件有限公司 | The preparation method of chill and chill |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147188A (en) * | 2021-04-08 | 2022-03-08 | 山东昊方联合铸造有限公司 | Manufacturing process of tubular thick and long sand core |
| CN114799054A (en) * | 2022-04-18 | 2022-07-29 | 共享装备股份有限公司 | Chilling block for 3D printing sand mold and using method thereof |
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Application publication date: 20180710 |