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Inorganic binder for casting

An inorganic binder and solvent technology, applied in casting molding equipment, molds, manufacturing tools, etc., can solve problems such as the limitation of high gas generation, environmental pollution of cost resin sand, restricting the development of organic resin binders, etc. Low cost, broad application prospects and obvious advantages

Active Publication Date: 2019-07-12
NINGXIA KOCEL MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the organic resin binder has excellent performance, its high cost, the serious pollution of the environment during the use of the resin sand, and the limitations of the high gas generation in the quality control of castings are serious. Restricting the further development of organic resin binders in the field of foundry 3D inkjet printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] ① Pump 40% of the alkali metal silicate and 36% of the solvent into the enamel reaction kettle with a vacuum pump, start stirring and start to heat up, the temperature rises to 95-105°C, and timed stirring for 45 ~60min.

[0033] ②Put the 12% mass fraction of the modulus regulator into the enamel reaction kettle with a vacuum pump, heat-preserve and stir at 95-105°C for 30-45 minutes.

[0034] ③ 10% mass fraction of the modifier is pumped into the enamel reaction kettle with a vacuum pump, the temperature is raised to 120-125°C, and the reaction is stirred for 60-90 minutes.

[0035] ④ Cool down to 35-40°C, add 1% mass fraction of the surfactant and 1% mass fraction of the preservative, and continue stirring for 30-40 minutes.

[0036] ⑤Reduce the temperature to 20-25°C, test and package, and then obtain the new inorganic binder product for casting 3D inkjet printing.

[0037] The viscosity of the inorganic binder for casting is 10.4mpa.s at 25°C, the gas output of th...

Embodiment 2

[0039] ① Pump 38% mass fraction of the alkali metal silicate and 33% mass fraction of the solvent into the enamel reaction kettle with a vacuum pump, start stirring and start to heat up, the temperature rises to 95-105 °C, and timed stirring for 45-45 °C 60min.

[0040] ② Pump 15% of the modulus regulator into the enamel reaction kettle with a vacuum pump, heat-preserve and stir at 95-105°C for 30-45 minutes.

[0041] ③ Pump 12% mass fraction of the modifier into the enamel reaction kettle with a vacuum pump, raise the temperature to 120-125° C., and stir for 60-90 minutes.

[0042] ④ Cool down to 35-40°C, add 0.8% by mass fraction of the surfactant and 1.2% by mass fraction of the preservative, and continue stirring for 30-40min.

[0043] ⑤Reduce the temperature to 20-25°C, test and package, and then obtain the new inorganic binder product for casting 3D inkjet printing.

[0044] The viscosity of the inorganic binder for casting is 9.7mpa.s at 25°C, the gas output of the sa...

Embodiment 3

[0046] ①Put the alkali metal silicate with 42% mass fraction and the solvent with 39% mass fraction into the enamel reaction kettle with a vacuum pump, start stirring and start to heat up, the temperature rises to 95-105 °C, and timed stirring for 45-45 °C 60min.

[0047] ② Pump 10% by mass of the modulus regulator into the enamel reaction kettle with a vacuum pump, heat-preserve and stir at 95-105°C for 30-45 minutes.

[0048] ③ Use a vacuum pump to pump 6.9% of the modifier into the enamel reaction kettle, raise the temperature to 120-125°C, and stir for 60-90 minutes.

[0049] ④ Cool down to 35-40°C, add 1.4% mass fraction of the surfactant and 0.7% mass fraction of the preservative, and continue stirring for 30-40 minutes.

[0050] ⑤Reduce the temperature to 20-25°C, test and package, and then obtain the new inorganic binder product for casting 3D inkjet printing.

[0051] The viscosity of the inorganic binder for casting is 11.3mpa.s at 25°C, the gas output of the sand ...

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Abstract

The invention relates to an inorganic binder for casting. The inorganic binder comprises alkali metal silicates, a surface active agent, a modulus modifier, a preservative, a modifier and a solvent, wherein the alkali metal silicates comprise at least one of sodium silicate, potassium silicate and lithium silicate; the surface active agent is an anionic surfactant; the modulus modifier is strong alkali; the solvent is deionized water; and the preservative comprises one of potassium sorbate, ethyl 4-hydroxybenzoate, propyl 4-hydroxybenzoate and sorbic acid or a combination of the above ingredients; the modifier is one of sodium hexametaphosphate, sodium tripolyphosphate, dipotassium phosphate, dextrin and silicon dioxide or a combination of the above ingredients; and the inorganic binder for casting is an alkaline aqueous solution. To solve deficiencies in the prior art, the invention provides the inorganic binder for casting. The inorganic binder for casting in 3D ink-jet printing provided by the invention is advantaged in low viscosity, a low gas content, low cost, low VOC emission and extensive application prospects.

Description

technical field [0001] The invention relates to the field of casting auxiliary materials, in particular to an inorganic binder for casting. Background technique [0002] Together with robots and the Internet, 3D printing technology is called the main symbol of the third industrial revolution. At present, some industrial-grade 3D inkjet printers have been used in foundry production services, mainly for rapid prototyping of castings, remaking molds, printing mold shells, sand cores, etc. [0003] At present, the binders commonly used in foundry 3D inkjet printing are organic resins, such as furan resin and phenolic resin. Although the organic resin binder has excellent performance, its high cost, the serious pollution of the environment during the use of the resin sand, and the limitations of the excessive gas generation in the quality control of castings are serious. This restricts the further development of organic resin binders in the field of casting 3D inkjet printing. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/18
CPCB22C1/188
Inventor 邢金龙陈伟张茜
Owner NINGXIA KOCEL MOLD
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