CN104942220A - Thermo-curing core-making process by use of inorganic binder - Google Patents
Thermo-curing core-making process by use of inorganic binder Download PDFInfo
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- CN104942220A CN104942220A CN201510322383.9A CN201510322383A CN104942220A CN 104942220 A CN104942220 A CN 104942220A CN 201510322383 A CN201510322383 A CN 201510322383A CN 104942220 A CN104942220 A CN 104942220A
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- inorganic binder
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Abstract
The invention provides a thermo-curing core-making process by use of an inorganic binder. The inorganic binder water glass is added into ceramic foundry sand, then performing core-shooting for 3-10 s on a hot-core box core shooter at the core-shooting pressure of 0.3-0.6 MPa for shaping, and heating and curing for 30-150 s at the temperature of 200-300 DEG C to obtain a complete sand mould. As special ceramic foundry sand is adopted to replace traditional foundry silica sand, the addition of the inorganic binder is reduced to a large extent, and accordingly, the defect of poor collapsibility of inorganic binder sand is avoided.
Description
Technical field
The invention belongs in casting technology field a kind of core manufacturing craft adopting inorganic binder to realize bonding operation, a kind of inorganic binder thermal curing method core manufacturing craft specifically.
Background technology
Use organic binder bond in traditional core manufacturing craft, as comparatively common furane resins, alkali phenolic resins, nation Buddhist nun resin etc., long-term application practice shows, the price of resin is higher and environmental pollution is larger more.Along with people are under the increasingly strict condition of the requirement of its own existence conditions and environment; the investment of workshop labour protection and production environment health aspect can be caused very large; thus making the application of resin sand be subject to a definite limitation, direction is transferred to traditional inorganic binder especially to the research of waterglass by much research.
Recently during the last ten years, along with the basic composition of people for waterglass and the in-depth gradually of " aging " phenomenon essence understanding, the exploitation of novel hardening process achieves breakthrough, generally acknowledging is heating and curing entirely can give full play to the adhesion strength of waterglass, but water-glass sand also exists collapsibility difference, old sand such as can not to recycle fully at the problem.
Summary of the invention
The invention provides a kind of inorganic binder thermal curing method core manufacturing craft, it adopts specific nice foundry sand to replace traditional casting silica sand, thus decrease the addition of inorganic binder to a great extent, thus improve the defect of the collapsibility difference that inorganic adhesive sand exists.
The present invention realizes above-mentioned purpose by the following technical solutions:
A kind of inorganic binder thermal curing method core manufacturing craft, it adopts in nice foundry sand, adds inorganic binder waterglass, then on hot box shoot core machine, under the pressure of core shooting pressure 0.3-0.6MPa, core shooting 3-10s is shaping, and to its 30-150s thus obtain complete sand mold of being heating and curing at the temperature of 200-300 DEG C.
Described nice foundry sand is real density is 2.9g/cm
3spherical nice foundry sand, in nice foundry sand, the content of each component is respectively: Al
2o
375-85%, SiO
2≤ 15%, TiO
2≤ 1.5%; Nice foundry sand is screened, makes its AFS fineness be 50-65, and to adjust its pH value be 7-8.
The adding proportion of described inorganic binder waterglass in nice foundry sand is that the ratio being 1.5-2.0% according to percentage by weight is added.
The present invention adopts technique scheme to have following beneficial effect:
1, under the condition keeping enough process ruggedness, significantly reduce binding agent addition, thus make that the long-standing collapsibility of water-glass sand is poor, old sand the problem of reuse can not obtain good solution; Shake out performance and the surface quality that match in excellence or beauty completely in organic machine binding agent series solidification sand can be obtained;
2, type (core) sand hot deformability is excellent, and casting thermal fragmentation tendency is minimum, while the most economical acquisition of guarantee perfects foundry goods, effectively improves surface quality of continuous castings, improves casting efficiency and product quality;
3, extremely low high temperature gas forming amount, high temperature, without noxious gas emission, is conducive to environmental protection;
4, there is excellent economy, be only equivalent to 1/20th of resin organic binder bond price.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Be specific embodiments more of the present invention below.
Embodiment 1
1) the choosing of nice foundry sand:
Choosing real density is 2.9g/cm
3spherical nice foundry sand, in nice foundry sand, the content of each component is respectively: Al
2o
384%, SiO
215%, TiO
21%; Nice foundry sand is screened, makes its AFS fineness be 50-65, and to adjust its pH value be 8.
2) the mixed system of the interpolation of inorganic binder:
The ratio being 2.0% according to percentage by weight in above-mentioned nice foundry sand is mixed into inorganic additive waterglass, and is mixed.
3) core is noted shaping
By step 2) in mixing waterglass close nice foundry sand become corresponding sand mold by hot box shoot core machine core shooting 10s under the pressure of 0.5MPa.
4) be entirely heating and curing
The 100s that is heating and curing at the temperature of 250 DEG C by sand mold in step 3) obtains complete sand mold.
After testing, the coefficient of performance of this sand mold is as follows:
AFS fineness: 50-65
Hot tensile strength: (210 DEG C of 3min) 1.15MPa
Room temperature tensile strength: 5.7 MPa
Hot bending strength: (210 DEG C of 3min) 5.5MPa
Normal temperature bending strength: 13MPa
Gas forming amount: (1000 DEG C) 4.6ml/g
Burning decrement: 1.36%
Expansion rate: 0.3%
Embodiment 2
1) the choosing of nice foundry sand:
Choosing real density is 2.9g/cm
3spherical nice foundry sand, in nice foundry sand, the content of each component is respectively: Al
2o
384.3%, SiO
214.7%, TiO
21%; Nice foundry sand is screened, makes its AFS fineness be 50-65, and to adjust its pH value be 7.5.
2) the mixed system of the interpolation of inorganic binder:
The ratio being 1.8% according to percentage by weight in above-mentioned nice foundry sand is mixed into inorganic additive waterglass, and is mixed.
3) core is noted shaping
By step 2) in mixing waterglass close nice foundry sand become corresponding sand mold by hot box shoot core machine core shooting 8s under the pressure of 0.45MPa.
4) be entirely heating and curing
The 130s that is heating and curing at the temperature of 280 DEG C by sand mold in step 3) obtains complete sand mold.
After testing, the coefficient of performance of this sand mold is as follows:
AFS fineness: 50-65
Hot tensile strength: (210 DEG C of 3min) 1.18MPa
Room temperature tensile strength: 5.65MPa
Hot bending strength: (210 DEG C of 3min) 5.7MPa
Normal temperature bending strength: 14.3MPa
Gas forming amount: (1000 DEG C) 4.5ml/g
Burning decrement: 1.4%
Expansion rate: 0.25%
Embodiment 3
1) the choosing of nice foundry sand:
Choosing real density is 2.9g/cm
3spherical nice foundry sand, in nice foundry sand, the content of each component is respectively: Al
2o
384%, SiO
215%, TiO
21%; Nice foundry sand is screened, makes its AFS fineness be 50-65, and to adjust its pH value be 7.8.
2) the mixed system of the interpolation of inorganic binder:
The ratio being 1.9% according to percentage by weight in above-mentioned nice foundry sand is mixed into inorganic additive waterglass, and is mixed.
3) core is noted shaping
By step 2) in mixing waterglass close nice foundry sand become corresponding sand mold by hot box shoot core machine core shooting 10s under the pressure of 0.6MPa.
4) be entirely heating and curing
The 150s that is heating and curing at the temperature of 300 DEG C by sand mold in step 3) obtains complete sand mold.
After testing, the coefficient of performance of this sand mold is as follows:
AFS fineness: 50-65
Hot tensile strength: (210 DEG C of 3min) 1.2MPa
Room temperature tensile strength: 5.85 MPa
Hot bending strength: (210 DEG C of 3min) 5.6MPa
Normal temperature bending strength: 13.2MPa
Gas forming amount: (1000 DEG C) 4.7ml/g
Burning decrement: 1.2%
Expansion rate: 0.25%
Claims (3)
1. an inorganic binder thermal curing method core manufacturing craft, it adopts in nice foundry sand, adds inorganic binder waterglass, then on hot box shoot core machine, under the pressure of core shooting pressure 0.3-0.6MPa, core shooting 3-10s is shaping, and to its 30-150s thus obtain complete sand mold of being heating and curing at the temperature of 200-300 DEG C.
2. a kind of inorganic binder thermal curing method core manufacturing craft according to claim 1, is characterized in that: described nice foundry sand is real density is 2.9g/cm
3spherical nice foundry sand, in nice foundry sand, the content of each component is respectively: Al
2o
375-85%, SiO
2≤ 15%, TiO
2≤ 1.5%; Nice foundry sand is screened, makes its AFS fineness be 50-65, and to adjust its pH value be 7-8.
3. a kind of inorganic binder thermal curing method core manufacturing craft according to claim 1, is characterized in that: the adding proportion of described inorganic binder waterglass in nice foundry sand is that the ratio being 1.5-2.0% according to percentage by weight is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510322383.9A CN104942220A (en) | 2015-06-13 | 2015-06-13 | Thermo-curing core-making process by use of inorganic binder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510322383.9A CN104942220A (en) | 2015-06-13 | 2015-06-13 | Thermo-curing core-making process by use of inorganic binder |
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| CN104942220A true CN104942220A (en) | 2015-09-30 |
Family
ID=54157578
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510322383.9A Pending CN104942220A (en) | 2015-06-13 | 2015-06-13 | Thermo-curing core-making process by use of inorganic binder |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020006412A (en) * | 2018-07-09 | 2020-01-16 | 花王株式会社 | Fire-resistant aggregate |
| CN111718175A (en) * | 2019-03-20 | 2020-09-29 | 沈阳铸造研究所有限公司 | CO (carbon monoxide)2Hardened inorganic binder and method for producing same |
| GB2625314A (en) * | 2022-12-13 | 2024-06-19 | Ceramic Additive Mfg Ltd | Method of manufacturing ceramic objects |
Citations (5)
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|---|---|---|---|---|
| SU1041202A1 (en) * | 1979-11-12 | 1983-09-15 | Научно-Исследовательский Институт Тяжелого Машиностроения | Method of strengthening moulds and cores of liquid glass mixtures |
| WO2006058664A3 (en) * | 2004-11-29 | 2007-11-08 | Laempe & Moessner Gmbh | Use of poorly soluble salts in combination with liquid glass for producing moulds and cores used in casting methods |
| CN101172302A (en) * | 2007-09-29 | 2008-05-07 | 沈阳铸造研究所 | Modified silicate-bonded sand temperature core box core-producing technique |
| CN101293271A (en) * | 2007-04-24 | 2008-10-29 | 沈阳汇亚通铸造材料有限责任公司 | Method for making core with aeration ossification |
| CN101663112A (en) * | 2007-02-19 | 2010-03-03 | 阿什兰-苏德舍米-克恩费斯特有限公司 | The heat regeneration of foundry sand |
-
2015
- 2015-06-13 CN CN201510322383.9A patent/CN104942220A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1041202A1 (en) * | 1979-11-12 | 1983-09-15 | Научно-Исследовательский Институт Тяжелого Машиностроения | Method of strengthening moulds and cores of liquid glass mixtures |
| WO2006058664A3 (en) * | 2004-11-29 | 2007-11-08 | Laempe & Moessner Gmbh | Use of poorly soluble salts in combination with liquid glass for producing moulds and cores used in casting methods |
| CN101663112A (en) * | 2007-02-19 | 2010-03-03 | 阿什兰-苏德舍米-克恩费斯特有限公司 | The heat regeneration of foundry sand |
| CN101293271A (en) * | 2007-04-24 | 2008-10-29 | 沈阳汇亚通铸造材料有限责任公司 | Method for making core with aeration ossification |
| CN101172302A (en) * | 2007-09-29 | 2008-05-07 | 沈阳铸造研究所 | Modified silicate-bonded sand temperature core box core-producing technique |
Non-Patent Citations (1)
| Title |
|---|
| 胡彭生等: ""热芯盒射芯用SG 型水玻璃砂改性"", 《铸造》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020006412A (en) * | 2018-07-09 | 2020-01-16 | 花王株式会社 | Fire-resistant aggregate |
| CN111718175A (en) * | 2019-03-20 | 2020-09-29 | 沈阳铸造研究所有限公司 | CO (carbon monoxide)2Hardened inorganic binder and method for producing same |
| CN111718175B (en) * | 2019-03-20 | 2022-05-10 | 沈阳铸造研究所有限公司 | CO (carbon monoxide)2Hardened inorganic binder and method for producing same |
| GB2625314A (en) * | 2022-12-13 | 2024-06-19 | Ceramic Additive Mfg Ltd | Method of manufacturing ceramic objects |
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Application publication date: 20150930 |