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Composite phosphate inorganic adhesive for 3D sand mold printing and preparation method thereof

A composite phosphate and inorganic binder technology, applied in casting molding equipment, cores, molds, etc., can solve the problems of restricted application, poor collapsibility, poor moisture absorption, etc., to prolong storage and use time, overcome moisture absorption resistance The effect of poor performance and excellent anti-hygroscopic performance

Active Publication Date: 2015-12-09
NINGXIA KOCEL MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the former Soviet Union, foundry workers tried to apply phosphate inorganic binders to the casting field, but because they could only be hardened by heating, and ordinary phosphate inorganic binders generally had high viscosity, Problems such as low strength, poor collapsibility and poor moisture absorption resistance have seriously restricted its application in traditional cast steel, cast iron and other fields, and further restricted its application in high-tech casting technology fields such as 3D sand printing.
[0007] 3D sand printing technology requires the binder to have low viscosity and fast hardening, and at the same time ensure that the sand strength increases in a short period of time. Ordinary phosphate inorganic binders cannot meet the needs of 3D sand printing, which directly hinders the development of phosphates. Application of Inorganic Binder in High-end Casting Field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition raw material of composite phosphate inorganic binder for 3D sand mold printing of the present embodiment is ： Aluminum hydroxide 6.5%, magnesium carbonate 3%, boric acid 3%, 85% industrial phosphoric acid 50%, urea 1%, xylitol 2%, D-sorbitol 2%, citric acid 1%, aluminum tripolyphosphate 2.5% , aluminum dihydrogen tripolyphosphate 4%, deionized water 25%.

[0026] The preparation method of a kind of 3D sand mold printing composite phosphate non-scrupulous binder of the present embodiment is:

[0027] Step 1, add 65Kg aluminum hydroxide and 250Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state;

[0028] Step 2: Slowly add 500kg of 85% industrial phosphoric acid. After the reaction is clear and transparent, continue to react for at least 1 hour, turn off the heating, and when the temperature drops to 60°C, slowly add 30Kg of magnesium carbonate, keep warm at 60°C for at least 30 minutes, and then ...

Embodiment 2

[0033] The raw materials of the composite phosphate inorganic binder for 3D sand printing in this embodiment are: aluminum hydroxide 7%, magnesium carbonate 3%, boric acid 4.5%, 85% industrial phosphoric acid 47%, urea 1%, xylitol 1.5% %, D-sorbitol 1.5%, citric acid 1%, aluminum tripolyphosphate 3%, aluminum dihydrogen tripolyphosphate 3%, deionized water 27.5%.

[0034] The preparation method of a kind of 3D sand mold printing composite phosphate non-scrupulous binder of the present embodiment is:

[0035] Step 1, add 70Kg aluminum hydroxide and 275Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state;

[0036] Step 2: Slowly add 470kg of 85% industrial phosphoric acid. After the reaction is clear and transparent, continue to react for at least 1 hour, turn off the heating, and when the temperature drops to 60°C, slowly add 30Kg of magnesium carbonate, keep warm at 60°C for at least 30 minutes, and then heat to a slig...

Embodiment 3

[0041] The raw materials of the composite phosphate inorganic binder for 3D sand printing in this embodiment are: aluminum hydroxide 9%, magnesium carbonate 4%, boric acid 6%, 85% industrial phosphoric acid 45%, urea 1.5%, xylitol 2 %, D-sorbitol 2%, citric acid 1.5%, aluminum tripolyphosphate 6%, aluminum dihydrogen tripolyphosphate 6%, deionized water 17%.

[0042] The preparation method of a kind of 3D sand mold printing composite phosphate non-scrupulous binder of the present embodiment is:

[0043] Step 1, add 90Kg aluminum hydroxide and 170Kg deionized water into the enamel reaction kettle, start stirring and start heating to a slight boiling state;

[0044] Step 2: Slowly add 450kg of 85% industrial phosphoric acid. After the reaction is clear and transparent, continue to react for at least 1 hour, turn off the heating, and when the temperature drops to 60°C, slowly add 40Kg of magnesium carbonate, keep the temperature at 60°C for at least 30 minutes, and then heat to ...

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Abstract

The invention belongs to the field of auxiliary casting materials and relates to a composite phosphate inorganic adhesive for 3D sand mold printing and a preparation method thereof. The composite phosphate inorganic adhesive for 3D sand mold printing comprises the following components in percentage by mass: 4.5-9.5% of aluminum hydroxide, 1-4% of magnesium carbonate, 2.5-6.5% of boric acid, 30-70% of 85% industrial phosphoric acid, 0.5-1.5% of carbamide, 1-3% of xylitol, 1-3% of D-sorbitol, 0.5-1.5% of citric acid, 1.5-6.5% of aluminum triphosphate, 1.5-6.5% of aluminum dihydrogen tripolyphosphate and 7-37% of deionized water. According to the technical scheme, the composite phosphate inorganic adhesive for 3D sand mold printing has the beneficial effects that the prepared composite phosphate inorganic adhesive is low in viscosity and high in adhesion strength; after the composite phosphate inorganic adhesive is roasted at the high temperature over 600 DEG C, the composite phosphate inorganic adhesive is low in residual strength; the adhesive is excellent in collapsibility and excellent in moisture absorption resistance.

Description

technical field [0001] The invention belongs to the field of casting auxiliary materials, and in particular relates to a composite phosphate inorganic binder for 3D sand mold printing and a preparation method thereof. Background technique [0002] Three-dimensional printing (ThreeDimensionalPrinting, 3DP) was proposed by E. Sachs et al. in 1992. Based on the principle of inkjet printers, material droplets are ejected from nozzles and solidified layer by layer according to a certain path. [0003] 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 printers have been used in foundry production services, mainly for rapid prototyping of castings, remaking molds, printing mold shells, sand cores, etc. [0004] At present, developed countries such as Germany and Japan have widely used 3D printing technology in the foundry industry. In China, 3D printing technology is in ...

Claims

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Application Information

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IPC IPC(8): B22C1/18B33Y70/00
CPCB22C1/18B33Y70/00
Inventor 邢金龙韩文
Owner NINGXIA KOCEL MOLD
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