CN105014004A - Optimized technology for manufacturing water glass shell - Google Patents
Optimized technology for manufacturing water glass shell Download PDFInfo
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- CN105014004A CN105014004A CN201410177580.1A CN201410177580A CN105014004A CN 105014004 A CN105014004 A CN 105014004A CN 201410177580 A CN201410177580 A CN 201410177580A CN 105014004 A CN105014004 A CN 105014004A
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Abstract
The invention relates to the steel casting industry, in particular to an optimized technology for manufacturing a water glass shell. The Be' of water glass ranges from 39 to 41, the modulus M of the water glass ranges from 3.1 to 3.4, and the density rho of the water glass ranges from 1.33 g/cm<3> to 1.368 g/cm<3>. A first face layer is formed by a mixture comprising 85% to 92% of 200-mesh quartz powder and 8% to 15% of 70-mesh-to-140-mesh quartz sand, the powder-liquid ratio n is 1.25 to 1.40:1, the viscosity measured through a phi6 flow cup ranges from 20 S to 60 S, the thickness of a coating ranges from 0.28 mm to 0.42 mm, and 40/70-mesh quartz sand is scattered. A second face layer is formed by 200-mesh quartz powder, the powder-liquid ratio n is 0.8 to 1.15:1, the viscosity measured through a phi6 flow cup ranges from 20 S to 60 S, the thickness of a coating ranges from 0.22 mm to 0.26 mm, 20/40-mesh quartz sand is scattered, and hardening is carried out through ammonium chloride. A transition layer is formed by mullite powder, the viscosity measured through a phi8 flow cup ranges from 8 S to 25 S, and 16/30-mesh mullite sand is scattered. Reinforcing layers are formed by 200-mesh mullite powder, the powder-liquid ratio n is 1.10 to 1.75:1, the viscosity, measured through a phi8 flow cup, of the first layer ranges from 30 S to 40 S, the viscosity, measured through the phi8 flow cup, of the second layer ranges from 50 S to 65 S, the viscosity, measured through the phi8 flow cup, of the third layer ranges from 70 S to 85 S, the viscosity, measured through the phi8 flow cup, of the fourth layer and the other layers ranges from 90 S to 120 S, 10/20-mesh mullite sand is scattered, and hardening is carried out through aluminum chloride. The manufactured shell can meet the requirements for cast fine steel castings.
Description
Technical field
The present invention relates to cast steel industry, provide a kind of Optimization Technology making sodium silicate shell to investment casting shell, apply this technique and both improved the quality making shell, reduce the loss in technical process, the required precision of precise steel casting can be ensured again.
Background technology
Sodium silicate shell raw and auxiliary material enriches, and low cost of manufacture, is more than 50 year traditional handicraft, is widely used in the steel-casting that model casting physical dimension, form and position tolerance, surface finish requirements are not bery high.The raw and auxiliary material that many enterprises use in the same industry, formulation for coating material, shell side method processed are different, normally " teacher is with apprentice " shell processed by rule of thumb, do not have strict technological specification, sometimes occur shell layering, crackle, pore, burning into sand, under-ageing, the coarse phenomenon of inner chamber, the shell proportion of goods damageds are high.Casting foundry goods out can not ensure dimensional accuracy, surface finish requirements.Later process polishing workload is large, and the production cycle is long, and cost is high, and shell is not suitable for the larger pump valve class steel-casting of casting specification.
Summary of the invention
The object of this invention is to provide a kind of Optimization Technology making sodium silicate shell, the technical parameter of raw and auxiliary material when defining shell processed, formulation for coating material, sclerosis mode, activity duration, technical ability main points.Solve the technical barriers such as shell layering, crackle, pore, burning into sand, under-ageing, inner chamber be coarse, reduce the shell proportion of goods damageds.The steel-casting of casting out with this shell can ensure size, surface accuracy, and later process polishing workload is little, with short production cycle, and shell can be cast the larger pump valve class steel-casting of specification.
Technical solution of the present invention provides a kind of Optimization Technology making sodium silicate shell, key optimizes formulation for coating material and sclerosis mode, it is characterized in that: each layer binder waterglass performance parameter is Be ' 39-41, modulus M=3.1-3.4, density p=1.33g-1.368g/cm
3, first surface coating formula is: the 200 order silica flours of powder 85-92%, the 70-140 order quartz sand compound of 8-15%, powder liquor ratio n=1.25-1.40:1, add the wetting agent of waterglass liquid weight 0.3-1%, the defoamer of 0.1-0.5%, at relative humidity 30-90%, at room temperature 5-32 DEG C, mixing time is greater than 40 min, placement is greater than 10h, stir before using and be greater than 30min, with Ф 6 flow cup measure viscosity be 20-60S, coating layer thickness is 0.28-0.42mm, 40/70 object quartz sand is spread after wax-pattern dip-coating material, natural drying 30-120min, put into ammonium chloride pond to harden 120-140 min, ammonium chloride Be ' 12-14, pH value 4-7, the clean water time is greater than 10s, force wind in being greater than 10h, second investment precoat formula is: powder 200 order silica flour moduluses, powder liquor ratio n=0.80-1.15:1, add the wetting agent of waterglass liquid weight 0.5%, the defoamer of 0.3%, at relative humidity 30-90%, temperature 5-32 DEG C of stirred at ambient temperature time is greater than 40 min, placement is greater than 10h, with Ф 6 flow cup measure viscosity be 20-60S, coating layer thickness is 0.22-0.26mm, 20/40 object quartz sand is spread after wax-pattern dip-coating material, put into ammonium chloride pond to harden 120-140 min, ammonium chloride Be ' 12-14, pH value 4-7, the clean water time is greater than 10s, force air-dried is greater than 10h, transition zone formulation for coating material is: powder 200 orders do not carry out powder, and the viscosity stirring rear Ф 8 flow cup measurement coating is 8-25S, spreads 16/30 order and do not carry out sand after dip-coating material, adopt to immerse in aluminum chloride aqueous solution and harden, aluminium chloride Be ' 24-27, pH value 1.4-2.5, the time is greater than 90min, and natural air drying is greater than 30 min, reinforcing each coating formula is: with 200 order porzite powders, powder liquor ratio n=1.10-1.75:1, measuring dope viscosity ground floor with Ф 8 flow cup after stirring is 30-40S, second layer 50-65S, third layer is 70-85S, more than 4th layer is 90-120S, spreads 10/20 and do not carry out sand after dip-coating material, adopts to immerse in the crystal aluminum chloride aqueous solution to harden, aluminium chloride Be ' 24-27, pH value 1.4-2.5, firm time is greater than 90min, and every layer of natural air drying is greater than 30 min.Formwork dewaxing aftershaping shell, through 920-980 DEG C of roasting, insulation more than 4h comes out of the stove, and hot shell is greater than 200 DEG C of pour steels.
good effect of the present invention is:
The sodium silicate shell cost that the present invention makes is lower, save more than 5%, the defect that sodium silicate shell easily produces can be eliminated, the shell proportion of goods damageds are few, improve casting dimension, surface accuracy, product first-time qualification rate reaches more than 80%, and later process polishing workload is little, production cycle is relatively short, the pump valve class steel-casting that specification of can casting is larger.
Detailed description of the invention
Waterglass performance parameter is selected to be Be ' 39-41, modulus M=3.1-3.4, density p=1.33g/cm
3; First surface coating formula is: the 200 order silica flours of powder 85-92%, the 80-120 order quartz sand compound of 8-15%, powder liquor ratio n=1.25-1.40:1, adds the wetting agent of waterglass liquid weight 0.3-1%, the defoamer of 0.1-0.5%, at relative humidity 30-90%, stir 40min at room temperature 5-32 DEG C, standing time is greater than 10h, fully wetting ripe coating, 25-30min is stirred again before painting wax-pattern, summer removes the limit, winter capping, feel has warmth sensation.With Ф 6 flow cup measure viscosity be 20-60S, coating layer thickness is 0.28-0.42mm, detect qualified after, wax-pattern will guarantee that levelling wanted by coating, do not pile up after immersing paint can taking-up, many slurries, soak letter face, then spread 40/70 object quartz sand, natural drying 30-120min, put into ammonium chloride pond to harden 120-140min, the clean water time is greater than 10s, forces wind in being greater than 10h, and gases at high pressure blow down the floating sand in surface, second investment precoat formula is: waterglass performance parameter is Be ' 39-41, modulus M=3.1-3.4, density p=1.368g/cm
3, powder 200 order silica flours, powder liquor ratio n:1=0.80-1.15, add the wetting agent of waterglass liquid weight 0.5%, the defoamer of 0.3%, at relative humidity 30-90%, temperature 5-32 DEG C of stirred at ambient temperature time is greater than 40min, standing time is greater than 10h, the viscosity that coating Ф 6 flow cup is measured is 20-60S, coating layer thickness is 0.22-0.26mm, spread 20/40 object quartz sand after wax-pattern dip-coating material, put into ammonium chloride pond and to harden 120-140min, the clean water time is greater than 10s, force air-dried is greater than 10h, and gases at high pressure blow down the floating sand in surface, transition zone formulation for coating material is: waterglass performance parameter is Be ' 39-41, modulus M=3.1-3.4, density p=1.368g/cm
3, powder 200 orders do not carry out powder, powder liquor ratio n=0.8-1.10:1, and the viscosity stirring rear Ф 8 flow cup measurement coating is 8-25S, spreads 16/30 order and do not carry out sand after dip-coating material, adopt to immerse in aluminum chloride aqueous solution and harden, the time is greater than 90min, and natural air drying is greater than 30 min, reinforcing each coating formula is: waterglass performance parameter is Be ' 39-41, modulus M=3.1-3.4, density p=1.368g/cm
3, with 200 order porzite powders, powder liquor ratio n=1.15-1.75:1, measuring dope viscosity ground floor with Ф 8 flow cup after stirring is 30-40S, second layer 50-65S, third layer is 70-85S, 4th layer is 90-120S, five-eight layers of 90-120S(are special, large part product), spread 10/20 after dip-coating material and do not carry out sand, adopt to immerse in the crystal aluminum chloride aqueous solution and harden, aluminium chloride Be ' 24-27, pH value 1.4-2.5, firm time is greater than 90min, every layer of natural air drying is greater than 30 min, successively blow down the floating sand in surface with gases at high pressure, during upper every coating operation about 30min, stir coating 5 about min again, prevent charging basket upper and lower powder liquor ratio uneven, paint aging.Relatively large is wound around reinforcement investment shell intensity with iron wire.Formwork dewaxing aftershaping shell, through 920-980 DEG C of roasting, insulation more than 4h comes out of the stove, and hot shell is greater than more than 200 DEG C pour steels.
Claims (1)
1. make an Optimization Technology for sodium silicate shell, key optimizes formulation for coating material and sclerosis mode, it is characterized in that: each layer binder waterglass performance parameter is Be ' 39-41, modulus M=3.1-3.4, density p=1.33g-1.368g/cm
3, first surface coating formula is: the 200 order silica flours of powder 85-92%, the 70-140 order quartz sand compound of 8-15%, powder liquor ratio n=1.25-1.40:1, add the wetting agent of waterglass liquid weight 0.3-1%, the defoamer of 0.1-0.5%, at relative humidity 30-90%, at room temperature 5-32 DEG C, mixing time is greater than 40min, placement is greater than 10h, stir before using and be greater than 30min, with Ф 6 flow cup measure viscosity be 20-60S, coating layer thickness is 0.28-0.42mm, 40/70 object quartz sand is spread after wax-pattern dip-coating material, natural drying 30-120min, put into ammonium chloride pond to harden 120-140min, ammonium chloride Be ' 12-14, pH value 4-7, the clean water time is greater than 10s, force wind in being greater than 10h, second investment precoat formula is: powder 200 order silica flours, powder liquor ratio n=0.80-1.15:1, add the wetting agent of waterglass liquid weight 0.5%, the defoamer of 0.3%, at relative humidity 30-90%, temperature 5-32 DEG C of stirred at ambient temperature time is greater than 40min, placement is greater than 10h, with Ф 6 flow cup measure viscosity be 20-60S, coating layer thickness is 0.22-0.26mm, 20/40 object quartz sand is spread after wax-pattern dip-coating material, put into ammonium chloride pond to harden 120-140 min, ammonium chloride Be ' 12-14, pH value 4-7, the clean water time is greater than 10s, force air-dried is greater than 10h, transition zone formulation for coating material is: powder 200 order mullite powders, and the viscosity stirring rear Ф 8 flow cup measurement coating is 8-25S, spreads 16/30 order and do not carry out sand after dip-coating material, adopt to immerse in aluminum chloride aqueous solution and harden, aluminium chloride Be ' 24-27, pH value 1.4-2.5, the time is greater than 90min, and natural air drying is greater than 30min, reinforcing each coating formula is: with 200 order porzite powders, powder liquor ratio n=1.10-1.75:1, measuring dope viscosity ground floor with Ф 8 flow cup after stirring is 30-40S, second layer 50-65S, third layer is 70-85S, more than 4th layer is 90-120S, spreads 10/20 and do not carry out sand after dip-coating material, adopts to immerse in the crystal aluminum chloride aqueous solution to harden, aluminium chloride Be ' 24-27, pH value 1.4-2.5, firm time is greater than 90min, and every layer of natural air drying is greater than 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177580.1A CN105014004A (en) | 2014-04-30 | 2014-04-30 | Optimized technology for manufacturing water glass shell |
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| CN201410177580.1A CN105014004A (en) | 2014-04-30 | 2014-04-30 | Optimized technology for manufacturing water glass shell |
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| CN105014004A true CN105014004A (en) | 2015-11-04 |
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| CN201410177580.1A Pending CN105014004A (en) | 2014-04-30 | 2014-04-30 | Optimized technology for manufacturing water glass shell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238681A (en) * | 2016-08-31 | 2016-12-21 | 大冶市石开工艺青铜铸造股份有限公司 | Lost Wax Casting shell waters cast copper production method |
| CN106756585A (en) * | 2016-12-14 | 2017-05-31 | 苏州富艾姆工业设备有限公司 | A kind of production technology of automobile engine to exhaust joint |
| CN107225210A (en) * | 2017-07-05 | 2017-10-03 | 天长市兴宇铸造有限公司 | A kind of method for casting wax-pattern external paint and application coating progress molding shell |
| CN112387930A (en) * | 2019-08-19 | 2021-02-23 | 张文利 | Water glass investment casting shell making process |
Citations (7)
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| GB870836A (en) * | 1958-11-05 | 1961-06-21 | Rolls Royce | Precision casting |
| GB876805A (en) * | 1959-06-11 | 1961-09-06 | Howe Sound Co | Improvements in making refractory shell molds |
| JPS4837496B1 (en) * | 1970-08-26 | 1973-11-12 | ||
| JPS52146723A (en) * | 1976-06-01 | 1977-12-06 | Ishikawajima Harima Heavy Ind | Mold manufacturing for precision casting |
| CN86102002A (en) * | 1986-03-20 | 1986-09-10 | 沈阳工业学院 | Ludox, water glass composite shell |
| CN85105348A (en) * | 1985-06-27 | 1986-12-24 | 青岛化工学院 | New method of the sclerosis of Ludox and the application in precision-investment casting system shell thereof |
| CN101891444A (en) * | 2010-07-09 | 2010-11-24 | 三一重工股份有限公司 | Reinforced layer coating for use in hot investment casting and preparation method thereof |
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2014
- 2014-04-30 CN CN201410177580.1A patent/CN105014004A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB870836A (en) * | 1958-11-05 | 1961-06-21 | Rolls Royce | Precision casting |
| GB876805A (en) * | 1959-06-11 | 1961-09-06 | Howe Sound Co | Improvements in making refractory shell molds |
| JPS4837496B1 (en) * | 1970-08-26 | 1973-11-12 | ||
| JPS52146723A (en) * | 1976-06-01 | 1977-12-06 | Ishikawajima Harima Heavy Ind | Mold manufacturing for precision casting |
| CN85105348A (en) * | 1985-06-27 | 1986-12-24 | 青岛化工学院 | New method of the sclerosis of Ludox and the application in precision-investment casting system shell thereof |
| CN86102002A (en) * | 1986-03-20 | 1986-09-10 | 沈阳工业学院 | Ludox, water glass composite shell |
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Non-Patent Citations (1)
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| 李云巧: "《实验室溶液制备手册》", 31 August 2006, 化学工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238681A (en) * | 2016-08-31 | 2016-12-21 | 大冶市石开工艺青铜铸造股份有限公司 | Lost Wax Casting shell waters cast copper production method |
| CN106756585A (en) * | 2016-12-14 | 2017-05-31 | 苏州富艾姆工业设备有限公司 | A kind of production technology of automobile engine to exhaust joint |
| CN107225210A (en) * | 2017-07-05 | 2017-10-03 | 天长市兴宇铸造有限公司 | A kind of method for casting wax-pattern external paint and application coating progress molding shell |
| CN112387930A (en) * | 2019-08-19 | 2021-02-23 | 张文利 | Water glass investment casting shell making process |
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Application publication date: 20151104 |