CN108326264A - A kind of method that cold-box makes forming graphite chill - Google Patents
A kind of method that cold-box makes forming graphite chill Download PDFInfo
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- CN108326264A CN108326264A CN201810185048.2A CN201810185048A CN108326264A CN 108326264 A CN108326264 A CN 108326264A CN 201810185048 A CN201810185048 A CN 201810185048A CN 108326264 A CN108326264 A CN 108326264A
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- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
- C04B2111/00879—Non-ferrous metallurgy
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of methods that cold-box makes forming graphite chill, using graphite sand as coremaking roughing sand material, by the contoured chill mould processing of casting Technology Design at cold box die, using CO2 cold core box core process, forming graphite chill germule is obtained, is toasted using abundant solidification, cleaning finishing obtains forming graphite chill finished product.The production method is simple, production efficiency is high, and effect is good, energy conservation and environmental protection, performance is stablized, 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 foreground.
Description
Technical field
The invention belongs to machine casting fields, and in particular to a kind of method that cold-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 easy ting produce 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, is 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 owes quality requirement in client.Therefore,
In current large batch of production, the cast iron contoured chill of a large amount of multi items is needed, and is equipped with special making teams and groups to expire
Foot production needs.The contoured chill for making a large amount of multi items 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 making 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
Tailor-made to professional production producer, especially 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.
For this purpose, using cold-box process technology, it is coremaking roughing sand material using graphite sand, the graphite of arbitrary shape can be made
Contoured chill, and the production is simple and convenient, production cost is relatively low.
Invention content
A kind of cold-box is provided the invention aims to overcome the deficiencies in the prior art 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 cold-box makes forming graphite chill
Method is to make roughing sand material with graphite sand, by the contoured chill mould processing of casting Technology Design at cold box die, uses
CO2 cold-box manufacture crafts obtain forming graphite chill germule, toasted using abundant solidification, cleaning finishing obtain graphite at
Type chill finished product.
Preferably, the graphite sand forms for artificial graphite electrode is broken, and the granularity of the graphite sand is 50/100 mesh, institute
The fixation carbon content for stating graphite sand is more than 95%.
Preferably, CO2 cold-boxs manufacture craft parameter is：Polyacrylic resin binder accounts for the 4- of graphite sand quality
6%, curing agent Ca (0H) 2 accounts for the 40-50% of binder quality, shooting time 4-6S, and it is 45-60s to blow CO2 firm times.
Preferably, forming graphite chill germule needs to obtain forming graphite by fully solidification baking, cooling, cleaning finishing
Chill finished product, 250 DEG C -300 DEG C of baking temperature, baking time 1-2 hours.
Preferably, a kind of method that cold-box makes forming graphite chill, is as follows：
(1) by the contoured chill mould processing of casting Technology Design at cold box die；
(2) graphite sand is added in sand mixer, and polyacrylic resin is added（Account for the 4-6% of graphite sand quality）And accelerator for hardening
Ca(0H)2（Account for the 40-50% of binder quality）Mulling is blended 30-60S, shakes out and is added in cold-box process sand hopper；
(3) sand is penetrated in molding, and it is 0.5-0.6MPa to penetrate sand compressed air pressure, and shooting time 4-6s passes through the work of compressed air
With by the core sand consolidation in cold-box；
(4) it is 45-60S to blow the carbon dioxide hardening time；
(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 solidification 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：
Using graphite sand as coremaking roughing sand material, cold-box manufacture craft, the production effect of forming graphite chill are hardened using CO2
Rate is high, and effect is good, energy conservation and environmental protection, and performance is stablized, and solves the cumbersome production process of casting contoured chill, with short production cycle,
It is effectively prevent casting bonding, stomata casting flaw, reduces production cost, and preparation process is simple, is easy to industrialized production, has
Vast market prospect.
Specific implementation mode
With reference to embodiment, the invention will be further described.Following embodiment is only used for clearly illustrating this hair
Bright technical solution, and not intended to limit the protection scope of the present invention.
Embodiment 1
(1) by the A contoured chill mould processings of casting Technology Design at cold box die；
(2) graphite sand is added in sand mixer, and polyacrylic resin is added（Account for the 4% of graphite sand quality）With accelerator for hardening Ca
(0H)2（Account for the 40% of binder quality）Mixed grind 40S shakes out and is added in cold-box process sand hopper；
(3) sand is penetrated in molding, and it is that 0.5MPa, shooting time 4s will be cold by the effect of compressed air to penetrate sand compressed air pressure
Cold core sand consolidation in core box；
(4) it is 60S to blow the carbon dioxide hardening time；
(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 solidification baking, cooling are cleared up（250 DEG C of baking temperature, baking time 2 hours）
Obtain forming graphite chill finished product.
Embodiment 2
(1) by the B contoured chill mould processings of casting Technology Design at cold box die；
(2) graphite sand is added in sand mixer, and polyacrylic resin is added（Account for the 5% of graphite sand quality）With accelerator for hardening Ca
(0H)2（Account for the 45% of binder quality）Mixed grind 50S shakes out and is added in cold-box process sand hopper；
(3) sand is penetrated in molding, and it is that 0.6MPa, shooting time 5s will be cold by the effect of compressed air to penetrate sand compressed air pressure
Cold core sand consolidation in core box；
(4) the air blowing carbon dioxide hardening time is 50S；
(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 solidification baking, cooling are cleared up（280 DEG C of baking temperature, baking time 1.5 is small
When）Obtain forming graphite chill finished product.
Embodiment 3
(1) by the C contoured chill mould processings of casting Technology Design at cold box die；
(2) graphite sand is added in sand mixer, and polyacrylic resin is added（Account for the 6% of graphite sand quality）With accelerator for hardening Ca
(0H)2（Account for the 50% of binder quality）Mixed grind 60S shakes out and is added in cold-box process sand hopper；
(3) sand is penetrated in molding, and it is that 0.5MPa, shooting time 6s will be cold by the effect of compressed air to penetrate sand compressed air pressure
Cold core sand consolidation in core box；
(4) it is 60S to blow the carbon dioxide hardening time；
(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 solidification baking, cooling are 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 chill mould processings of casting Technology Design at cold box die；
(2) graphite sand is added in sand mixer, and polyacrylic resin is added（Account for the 5% of graphite sand quality）With accelerator for hardening Ca
(0H)2（Account for the 50% of binder quality）Mixed grind 50S shakes out and is added in cold-box process sand hopper；
(3) sand is penetrated in molding, and it is that 0.55MPa, shooting time 5s will be cold by the effect of compressed air to penetrate sand compressed air pressure
Cold core sand consolidation in core box；
(4) it is 50S to blow the carbon dioxide hardening time；
(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 solidification baking, cooling are cleared up（280 DEG C of baking temperature, baking time 1.5 is small
When）Obtain forming graphite chill finished product.
The above is only a 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 deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of method that cold-box makes forming graphite chill, it is characterised in that:Using graphite sand as coremaking roughing sand material, will cast
It is cold to obtain forming graphite using CO2 cold-box manufacture crafts at cold box die for the contoured chill mould processing for making technological design
Iron germule, then fully solidification baking, cleaning finishing obtain forming graphite chill finished product.
2. the method that a kind of cold-box according to claim 1 makes forming graphite chill, it is characterised in that:The graphite
Sand is artificial graphite electrode powder, and the granularity of the graphite sand is 50/100 mesh, and the fixation carbon content of the graphite sand is more than 95%.
3. the method that a kind of cold-box according to claim 1 makes forming graphite chill, it is characterised in that：Cold-box system
It is as technological parameter：Binder accounts for the 4-6% of graphite sand quality, and accelerator for hardening accounts for the 40-50% of binder quality, shooting time 4-
6S, it is 45-60s to blow the carbon dioxide time.
4. the method that a kind of cold-box according to claim 1 makes forming graphite chill, it is characterised in that：The graphite
Contoured chill germule needs fully solidification baking, cleaning finishing to obtain forming graphite chill finished product, 250 DEG C -300 of baking temperature
DEG C, baking time 1-2 hours.
5. the method that a kind of cold-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 at cold box die；
(2) graphite sand is added in sand mixer, and binder is added（Account for the 4-6% of graphite sand quality）And accelerator for hardening（Account for bonding
The 40-50% of agent quality）Mixed grind 30-60S shakes out and is added in cold-box process sand hopper；
(3) sand is penetrated in molding, and it is 0.5-0.6MPa to penetrate sand compressed air pressure, and shooting time 4-6s passes through the work of compressed air
With by the core sand consolidation in cold-box；
(4) the firm time for blowing carbon dioxide is 45-60S；
(5) graphite chilling block core is taken out in die sinking, obtains graphite chilling block germule；
(6) by step, (5) graphite chilling block germule, fully solidification baking, cleaning are modified（250 DEG C -300 DEG C of baking temperature, baking time
1-2 hours）Obtain forming graphite chill finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185048.2A CN108326264A (en) | 2018-03-06 | 2018-03-06 | A kind of method that cold-box makes forming graphite chill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185048.2A CN108326264A (en) | 2018-03-06 | 2018-03-06 | A kind of method that cold-box makes forming graphite chill |
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| CN108326264A true CN108326264A (en) | 2018-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810185048.2A Pending CN108326264A (en) | 2018-03-06 | 2018-03-06 | A kind of method that cold-box makes forming graphite chill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114535512A (en) * | 2022-03-21 | 2022-05-27 | 勤威(天津)工业有限公司 | Cold core manufacturing production process |
| 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 |
| CN201922016U (en) * | 2010-12-10 | 2011-08-10 | 四川简阳海特有限公司 | Natural-shape 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 |
-
2018
- 2018-03-06 CN CN201810185048.2A patent/CN108326264A/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 |
| CN201922016U (en) * | 2010-12-10 | 2011-08-10 | 四川简阳海特有限公司 | Natural-shape 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114535512A (en) * | 2022-03-21 | 2022-05-27 | 勤威(天津)工业有限公司 | Cold core manufacturing production process |
| 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: 20180727 |
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