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A novel 3D sand printing inorganic binder liquid curing agent and preparation method thereof

An inorganic binder and curing agent technology, used in casting molding equipment, casting molds, cores, etc., can solve the problems of slow strength growth, slow hardening speed, and viscosity that cannot meet the requirements of inkjet printers, and achieve excellent performance. , High bonding strength, the effect of meeting the requirements of use

Active Publication Date: 2017-05-17
共享智能装备(安徽)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no liquid curing agent products for 3D sand printing inorganic binders in China, and the ordinary cast steel and cast iron fields do not have high requirements for the viscosity, free acid, moisture and other indicators of liquid curing agents for inorganic binders, which will lead to When the liquid curing agent for ordinary cast steel and cast iron is used in the field of 3D sand printing, its high viscosity cannot meet the requirements of inkjet printers. On the other hand, 3D sand printing requires rapid hardening, which must be achieved in a short period of time. Sufficient strength, while ordinary cast steel and cast iron liquid curing agents have high free acid and moisture content, slow hardening speed, and slow strength growth, which cannot meet the requirements of 3D sand printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0020] The raw materials of the liquid curing agent for 3D sand printing inorganic binder in this example are: 36% glyceryl diacetate, 34% glycerol triacetate, 7.5% absolute ethanol, 3.5% methacrylic acid, and 16% vinyl acetate , Xylitol 3%.

[0021] The preparation method of the liquid curing agent for the 3D sand printing inorganic binder of this embodiment is:

[0022] Step 1, pumping 360Kg of glyceryl diacetate and 340Kg of glyceryl triacetate into the enamel reaction kettle with a vacuum pump, start stirring, and stir for more than 30 minutes;

[0023] Step 2, slowly add 160Kg vinyl acetate, and continue to stir for more than 30min;

[0024] Step 3: Add 75Kg of absolute ethanol, 35Kg of methacrylic acid and 30Kg of xylitol in sequence, and continue to stir for more than 30 minutes to obtain a new liquid curing agent for inorganic binders for 3D sand printing, testing and packaging.

[0025] The liquid curing agent for 3D sand printing inorganic binder has a viscosity of...

Embodiment example 2

[0027] The raw materials of the liquid curing agent for 3D sand printing inorganic binder in this example are: 40% glyceryl diacetate, 32% glycerol triacetate, 9% absolute ethanol, 4.5% methacrylic acid, and 12% vinyl acetate , Xylitol 2.5%.

[0028] The preparation method of the liquid curing agent for the 3D sand printing inorganic binder of this embodiment is:

[0029] Step 1, pump 400Kg glyceryl diacetate and 320Kg glyceryl triacetate into the enamel reaction kettle with a vacuum pump, start stirring, and stir for more than 30 minutes;

[0030] Step 2, slowly add 120Kg vinyl acetate, and continue to stir for more than 30min;

[0031] Step 3: Add 90Kg of absolute ethanol, 45Kg of methacrylic acid and 25Kg of xylitol in sequence, and continue to stir for more than 30 minutes to obtain a new liquid curing agent for inorganic binders for 3D sand printing, testing and packaging.

[0032] The liquid curing agent for 3D sand printing inorganic binder has a viscosity of 18mPa•s ...

Embodiment example 3

[0034] The raw materials of the liquid curing agent for 3D sand printing inorganic binder in this embodiment are: 38% glyceryl acetate, 30% glyceryl triacetate, 8% absolute ethanol, 4% methacrylic acid, 17% vinyl acetate, Xylitol 3%.

[0035] Step 1, pump 380Kg glyceryl diacetate and 300Kg glycerol triacetate into the enamel reaction kettle with a vacuum pump, start stirring, and stir for more than 30 minutes;

[0036] Step 2, slowly add 170Kg vinyl acetate, and continue to stir for more than 30min;

[0037] Step 3: Add 80Kg of absolute ethanol, 40Kg of methacrylic acid and 30Kg of xylitol in sequence, and continue stirring for more than 30 minutes to obtain a liquid curing agent for inorganic binders for 3D sand printing, which is tested and packaged.

[0038] The liquid curing agent for 3D sand printing inorganic binder has a viscosity of 15mPa•s at 25°C, a density of 1.14g / ml; a free acid of 0.65%; a water content of 0.38%; and a usable time of 5min≤t≤15min ; The appearan...

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Abstract

The invention relates to a novel liquid curing agent used for a 3D sand mold printing inorganic binder and a preparation method of the novel liquid curing agent. The novel liquid curing agent comprises diacetin, glycerol triacetate, absolute ethyl alcohol, methacrylic acid, vinyl acetate and xylitol. The novel liquid curing agent used for the 3D sand mold printing inorganic binder has low viscosity, can be rapidly hardened and can meet the sand mold ink jet printing use requirement. When the adding amount of the novel liquid curing agent for the 3D sand mold printing inorganic binder accounts for 20% of the binder, the normal-temperature comprehensive strength of standard sand test blocks with the diameter of 30 mm*50 mm can reach 5.0 MPa or above, and the bonding strength is high; the free acid content of the novel liquid curing agent used for the 3D sand mold printing inorganic binder is smaller than 1.0%, the water content of the novel liquid curing agent used for the 3D sand mold printing inorganic binder is smaller than 0.5%, and performance of the novel liquid curing agent used for the 3D sand mold printing inorganic binder is excellent; and no substances or pungent smell doing harm to human bodies and the environment is generated in the production and use process, and the novel liquid curing agent belongs to green and environment-friendly materials.

Description

technical field [0001] The invention relates to the field of casting auxiliary materials, in particular to a novel liquid curing agent for inorganic binders for 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 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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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/20B33Y70/00
Inventor 邢金龙韩文王娟娟
Owner 共享智能装备(安徽)有限公司