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Casting mold three-dimensional printing formation method

A three-dimensional, spray printing technology, applied in the direction of casting mold composition, casting mold, casting molding equipment, etc., can solve the problems of increasing and easily clogging the mold gas volume of the nozzle, so as to reduce the cost of use, improve the stability of the process, improve the The effect of curing strength

Active Publication Date: 2017-06-06
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a three-dimensional spray printing forming method for molds, the purpose of which is to solve the problem of three-dimensional spray printing by designing a three-dimensional spray printing forming method with low gas volume that is not easy to clog the nozzle. When printing molds, the organic binder is easy to block the nozzle and cause the technical problem of increasing the gas volume of the mold

Method used

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  • Casting mold three-dimensional printing formation method

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Embodiment 1

[0024] A method for forming a three-dimensional jet printing mold, comprising the following steps:

[0025] (1) In terms of parts by mass, 99.5 parts of deionized water are used as a binder, and 0.5 parts of polyols are added to the deionized water to form a mixed solution, which is used as a liquid binder material for three-dimensional jet printing;

[0026] (2) In terms of parts by mass, use 1 part of instant sodium silicate as solid binder powder and 99 parts of raw sand (the raw sand can be quartz sand, pearl sand, mullite sand or zircon sand) for mechanical mixing , the above mixed powder is used as a printing material for three-dimensional jet printing;

[0027] (3) Put the liquid binder prepared in step (1) into the inkjet print head of the rapid prototyping device, put the mixed powder prepared in step (2) into the powder tank, and turn on the rapid prototyping device for three-dimensional jet printing. During the printing process or after the part is printed, the ins...

Embodiment 2

[0030] A method for forming a three-dimensional jet printing mold, comprising the following steps:

[0031] (1) In terms of parts by mass, 70 parts of deionized water are used as a binder, and 22 parts of absolute ethanol, 3 parts of polyols and 5 parts of cetyltrimethylammonium bromide are added to the deionized water to form a mixture Solution, the above mixed solution is used as a liquid binder material for three-dimensional jet printing;

[0032] (2) In terms of parts by mass, adopt 5 parts of instant sodium silicate as solid binder powder, add 0.5 part of polyvinyl alcohol to instant sodium silicate, and then mix with 94.5 parts of raw sand (the raw sand can be quartz sand) , orb sand, mullite sand or zircon sand) are mechanically mixed, and the above-mentioned mixed powder is used as a printing material for three-dimensional jet printing;

[0033] (3) Put the liquid binder prepared in step (1) into the inkjet print head of the rapid prototyping device, put the mixed pow...

Embodiment 3

[0036] A method for forming a three-dimensional jet printing mold, comprising the following steps:

[0037] (1) In terms of parts by mass, 50 parts of deionized water is used as a binder, and 49 parts of acetone, 0.5 part of organic ester and 0.5 part of glycerin are added to deionized water to form a mixed solution. liquid binder material;

[0038] (2) In terms of parts by mass, adopt 7 parts of instant sodium silicate as solid binder powder, add 0.8 part of polyvinyl alcohol to instant sodium silicate, and then mix with 92.2 parts of raw sand (the raw sand can be quartz sand) , orb sand, mullite sand or zircon sand) are mechanically mixed, and the above-mentioned mixed powder is used as a printing material for three-dimensional jet printing;

[0039] (3) Put the liquid binder prepared in step (1) into the inkjet print head of the rapid prototyping device, put the mixed powder prepared in step (2) into the powder tank, and turn on the rapid prototyping device for three-dimen...

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Abstract

The invention belongs to the technical field of rapid casting and discloses a casting mold three-dimensional printing formation method. The method comprises the following steps of 1, preparing a liquid binding agent; 2, preparing mixed powder; and 3, putting the liquid binding agent prepared in step 1 into an ink-jet printing head of rapid formation equipment, putting the mixed powder prepared in step 2 into a powder cylinder, starting the rapid formation equipment to conduct three-dimensional printing formation, in the printing process and / or after part printing is completed, solidifying a part through heating and / or microwave drying, and after solidification is completed, removing excessive powder, so that the needed casting mold part is obtained. According to the casting mold three-dimensional printing formation method, the liquid binding agent is a water-based binding agent and stable in property; the situation that a nozzle is blocked due to deterioration of the liquid binding agent cannot occur easily; technological stability of casting mold three-dimensional printing is improved; it is helpful to lower use cost; in addition, an inorganic binding agent material is adopted, and the gas generation amount of a casting mold is reduced; and it is helpful to reduce possibility of generation of defects such as air holes in a casting.

Description

technical field [0001] The invention belongs to the technical field of rapid casting, and more specifically relates to a three-dimensional jet printing forming method of a mold. Background technique [0002] Three-dimensional printing (Three-dimensional printing, 3DP) is also known as powder bonding three-dimensional printing or micro-jet bonding technology. Its process principle is to use computer technology to slice the three-dimensional CAD model of the part in the vertical direction according to a certain thickness. The original 3D CAD information is converted into a collection of 2D layer information. The molding equipment uses the movement of the nozzle on the surface of the powder bed according to the contour information of each layer to selectively spray liquid droplets on the powder surface to bond part of the powder. Form the cross-sectional profile of the current layer, cycle layer by layer, and the layers are also fixed by the bonding effect of the bonding soluti...

Claims

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Application Information

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IPC IPC(8): B22C9/02B22C1/00
CPCB22C1/00B22C9/02
Inventor 魏青松蔡道生田乐毛贻桅
Owner HUAZHONG UNIV OF SCI & TECH
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