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Inorganic binder for nonferrous metal 3D sand mould printing and preparation method thereof

A technology of inorganic binders and non-ferrous metals, applied in metal processing equipment, casting molding equipment, casting molds, etc., can solve problems such as hindering the application of inorganic binders, poor moisture absorption resistance, poor collapse performance, etc., to overcome poor moisture absorption resistance , Excellent anti-moisture performance, excellent collapse performance

Active Publication Date: 2015-09-23
NINGXIA KOCEL MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional inorganic binders generally have problems such as high viscosity, low strength, poor collapsibility and poor moisture absorption resistance, while 3D printing requires binders with low viscosity and fast hardening, while ensuring the strength of the molding sand. Traditional inorganic binders The binder cannot meet the needs of 3D printing, which directly hinders the application of inorganic binders in the high-end casting field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0023] The raw materials of the inorganic binder for 3D sand printing of non-ferrous metals in this example are: sodium silicate (modulus 2.85-3.4, solid, 120 mesh) 30%, disodium hydrogen phosphate 4.85%, D-sorbitol 3.0%, Water-soluble silicone oil (100%) 0.4%, tetraethyl silicate 1.4%, aluminum sulfate 0.45%, naphthalenesulfonic acid 0.4%, phenolic resin 1.2%, sodium hydroxide 1.3%, deionized water 57%. A preparation method of an inorganic binder for non-ferrous metal 3D sand mold printing in this embodiment is as follows:

[0024] Ⅰ. Add 300Kg sodium silicate and 570Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state, and keep it for more than 1 hour;

[0025] Ⅱ. Slowly add 48.5Kg disodium hydrogen phosphate and 30Kg D-sorbitol. After the reaction is clear and transparent, continue to react for more than 30 minutes, continue to add 14Kg tetraethyl silicate, 4.5Kg aluminum sulfate, 4Kg naphthalenesulfonic acid, keep ...

Embodiment example 2

[0030] The raw materials of the inorganic binder for 3D sand printing of non-ferrous metals in this example are: sodium silicate (modulus 2.85-3.4, solid, 120 mesh) 29%, disodium hydrogen phosphate 8.5%, D-sorbitol 5.0%, Water-soluble silicone oil (100%) 0.6%, tetraethyl silicate 1.8%, aluminum sulfate 0.55%, naphthalenesulfonic acid 0.6%, phenolic resin 1.7%, sodium hydroxide 1.6%, deionized water 50.65%. A preparation method of an inorganic binder for non-ferrous metal 3D sand mold printing in this embodiment is as follows:

[0031] Ⅰ. Add 290Kg sodium silicate and 506.5Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state, and keep it for more than 1 hour;

[0032] Ⅱ. Slowly add 85Kg disodium hydrogen phosphate and 50Kg D-sorbitol. After the reaction is clear and transparent, continue to react for more than 30 minutes, continue to add 18Kg tetraethyl silicate, 5.5Kg aluminum sulfate, 6Kg naphthalenesulfonic acid Reac...

Embodiment example 3

[0037] The raw materials of the inorganic binder for 3D sand printing of non-ferrous metals in this example are: sodium silicate (modulus 2.85-3.4, solid, 120 mesh) 28%, disodium hydrogen phosphate 6.5%, D-sorbitol 3.5%, Water-soluble silicone oil (100%) 0.5%, tetraethyl silicate 1.5%, aluminum sulfate 0.5%, naphthalenesulfonic acid 0.5%, phenolic resin 1.5%, sodium hydroxide 1.5%, deionized water 56%. A preparation method of an inorganic binder for non-ferrous metal 3D sand mold printing in this embodiment is as follows:

[0038] Ⅰ. Add 280Kg sodium silicate and 560Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state, and keep it for more than 1 hour;

[0039] Ⅱ. Slowly add 65Kg disodium hydrogen phosphate and 35Kg D-sorbitol. After the reaction is clear and transparent, continue to react for more than 30 minutes, continue to add 15Kg tetraethyl silicate, 5Kg aluminum sulfate, 5Kg naphthalenesulfonic acid, and keep sli...

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Abstract

The invention relates to an inorganic binder for nonferrous metal 3D sand mould printing and a preparation method thereof. The inorganic binder for nonferrous metal 3D sand mould printing comprises, by weight, 22%-34% of sodium silicate, 2%-11% of sodium hydrogen phosphate, 1.5%-5.5% of D-sorbitol, 0.2%-0.8% of water soluble silicone oil, 0,7%-2.3% of tetraethyl silicate, 0.3%-0.7% of aluminum sulfate, 0.3%-0.7% of naphthalene sulfonic acid, 0.4%-2.6% of phenolic resin, 0.7%-2.3% of sodium hydroxide and 46%-66% of deionized water. The inorganic binder for nonferrous metal 3D sand mould printing has the advantages that when the temperature of the prepared inorganic binder is 25 DEG C, the viscosity is smaller than 15 mpa.s, so that the using demand of sand mould ink jetting and printing is met; the bonding strength is high; the scattering performance of the binder is excellent, and casting sand removal is easy when the inorganic binder is applied to the casting field; and the moisture absorption resistance performance of the binder is excellent, the applicable time is short, and the binder can be quickly hardened.

Description

technical field [0001] The invention relates to the field of casting auxiliary materials, in particular to an inorganic binder for non-ferrous metal 3D sand mold printing and a preparation method thereof. Background technique [0002] Three-dimensional printing (Three Dimensional Printing, 3DP) was proposed by E. Sachs et al. in 1992. Based on the principle of inkjet printers, material droplets are ejected from the nozzle, and solidified layer by layer according to a certain path. 3D printing technology and robots, the Internet Together they are called the main hallmarks of the third industrial revolution. At present, some industrial-grade 3D printers have been used in foundry production services, mainly for rapid prototyping of castings, remaking molds, printing mold shells, sand cores, etc. [0003] Developed countries such as Germany and Japan have widely used 3D printing technology in the foundry industry. In China, 3D printing technology is in its infancy, especially i...

Claims

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Application Information

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IPC IPC(8): B22C1/18
Inventor 邢金龙韩文王娟娟
Owner NINGXIA KOCEL MOLD
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