3D printing molding material

Abstract

The invention provides a 3D printing molding material which consists of the following components: graded modified aluminum oxide powder, yellow dextrin powder and an adhesive, wherein the adhesive accounts for 5-50% of the mass of the molding material; the amount ratio of the graded modified aluminum oxide powder to the yellow dextrin powder is (65-97):(15-25). An aluminum oxide ceramic made of the molding material after sintering is of a micro-pore structure which is high in pore rate, uniform in aperture and controllable in distribution, in addition, the sintering shrinkage rate of the material is low, the size and the shape of the material can be maintained, and cracking can be avoided.

Description

technical field

[0001] The invention belongs to the technical field of molding materials for 3D printing, and in particular relates to a molding material for 3D printing. Background technique

[0002] Powder material 3D printing rapid prototyping, also known as additive manufacturing, its basic principle is a prototyping technique that produces 3D objects by laying down successive layers of material. 3D printing molding materials are an important material basis for the development of 3D printing rapid prototyping technology. To some extent, the development of materials determines whether 3D printing rapid prototyping can be more widely used. At present, 3D printing molding materials mainly include engineering plastics, photosensitive resins, rubber materials, metal materials and ceramic materials, among which ceramic materials have excellent properties such as high strength, high hardness, high temperature resistance, low density, good chemical stability, and corrosion resis...

Examples

Embodiment 1

[0024] A molding material for 3D printing. In parts by weight, 400 parts of 4 μm alumina powder, 200 parts of 1.2 μm alumina powder, and 30 parts of 0.6 μm alumina powder are respectively mixed with yellow dextrin with a mass fraction of 5%. The ethanol solution (the addition of the ethanol solution of yellow dextrin is 10% of the weight of the alumina powder) is ball milled and mixed and freeze-dried to obtain three kinds of modified alumina powders, wherein the freeze-drying method is: The mixture obtained after ball mill mixing is frozen at -10 ~ -30°C, and then dried in a vacuum drying oven at -10°C ~ -30°C and a vacuum of less than 100Pa for 24 hours to obtain modified alumina powder. The material-to-ball ratio (the ratio of raw materials to grinding balls) in the ball mill tank is 1:3;

[0025] Then the obtained three modified alumina powders were mixed and 150 parts of yellow dextrin powder were added, and then the mixed material was added to a ball mill tank with a rot...

Embodiment 2

[0028] A molding material for 3D printing. In parts by weight, 600 parts of 4 μm alumina powder, 300 parts of 1.2 μm alumina powder, and 70 parts of 0.6 μm alumina powder are mixed with yellow dextrin with a mass fraction of 10% respectively. The ethanol solution of yellow dextrin (the addition amount of the ethanol solution of yellow dextrin is 5% of the weight of alumina powder) is ball-milled and mixed and freeze-dried to obtain three kinds of modified alumina powders, wherein the freeze-drying method is the same as implementing Example 1, the material-ball ratio (ratio of raw material to grinding ball) in the ball mill jar is 1:3;

[0029] Then the obtained three modified alumina powders were mixed and 250 parts of yellow dextrin powder were added, and then the mixed material was added to a ball mill tank with a rotating speed of 600 rpm for 3 hours to obtain graded modified alumina powder and yellow paste Mixture of refined powder;

[0030] When the mixture of graded mod...

Embodiment 3

[0032] A molding material for 3D printing. In parts by weight, 500 parts of 4 μm alumina powder, 250 parts of 1.2 μm alumina powder, and 50 parts of 0.6 μm alumina powder are mixed with yellow dextrin with a mass fraction of 15% respectively. The ethanol solution (the addition of the ethanol solution of yellow dextrin is 8% of the weight of alumina powder) is ball milled and mixed and freeze-dried to obtain three kinds of modified alumina powders, wherein the method of freeze-drying is the same as that of implementing Example 1, the material-ball ratio (ratio of raw material to grinding ball) in the ball mill jar is 1:3;

[0033] Then the obtained three kinds of modified alumina powders were mixed and 200 parts of yellow dextrin powders were added, and then the mixed material was added into a ball mill tank with a rotating speed of 550 rpm for 2.5 hours to obtain graded modified alumina powders and yellow dextrin powders. Mixture of dextrin powder;

[0034] When the mixture o...

technical field

[0001] The invention belongs to the technical field of molding materials for 3D printing, and in particular relates to a molding material for 3D printing. Background technique

[0002] Powder material 3D printing rapid prototyping, also known as additive manufacturing, its basic principle is a prototyping technique that produces 3D objects by laying down successive layers of material. 3D printing molding materials are an important material basis for the development of 3D printing rapid prototyping technology. To some extent, the development of materials determines whether 3D printing rapid prototyping can be more widely used. At present, 3D printing molding materials mainly include engineering plastics, photosensitive resins, rubber materials, metal materials and ceramic materials, among which ceramic materials have excellent properties such as high strength, high hardness, high temperature resistance, low density, good chemical stability, and corrosion resis...

Examples

Embodiment 1

[0024] A molding material for 3D printing. In parts by weight, 400 parts of 4 μm alumina powder, 200 parts of 1.2 μm alumina powder, and 30 parts of 0.6 μm alumina powder are respectively mixed with yellow dextrin with a mass fraction of 5%. The ethanol solution (the addition of the ethanol solution of yellow dextrin is 10% of the weight of the alumina powder) is ball milled and mixed and freeze-dried to obtain three kinds of modified alumina powders, wherein the freeze-drying method is: The mixture obtained after ball mill mixing is frozen at -10 ~ -30°C, and then dried in a vacuum drying oven at -10°C ~ -30°C and a vacuum of less than 100Pa for 24 hours to obtain modified alumina powder. The material-to-ball ratio (the ratio of raw materials to grinding balls) in the ball mill tank is 1:3;

[0025] Then the obtained three modified alumina powders were mixed and 150 parts of yellow dextrin powder were added, and then the mixed material was added to a ball mill tank with a rot...

Embodiment 2

[0028] A molding material for 3D printing. In parts by weight, 600 parts of 4 μm alumina powder, 300 parts of 1.2 μm alumina powder, and 70 parts of 0.6 μm alumina powder are mixed with yellow dextrin with a mass fraction of 10% respectively. The ethanol solution of yellow dextrin (the addition amount of the ethanol solution of yellow dextrin is 5% of the weight of alumina powder) is ball-milled and mixed and freeze-dried to obtain three kinds of modified alumina powders, wherein the freeze-drying method is the same as implementing Example 1, the material-ball ratio (ratio of raw material to grinding ball) in the ball mill jar is 1:3;

[0029] Then the obtained three modified alumina powders were mixed and 250 parts of yellow dextrin powder were added, and then the mixed material was added to a ball mill tank with a rotating speed of 600 rpm for 3 hours to obtain graded modified alumina powder and yellow paste Mixture of refined powder;

[0030] When the mixture of graded mod...

Embodiment 3

[0032] A molding material for 3D printing. In parts by weight, 500 parts of 4 μm alumina powder, 250 parts of 1.2 μm alumina powder, and 50 parts of 0.6 μm alumina powder are mixed with yellow dextrin with a mass fraction of 15% respectively. The ethanol solution (the addition of the ethanol solution of yellow dextrin is 8% of the weight of alumina powder) is ball milled and mixed and freeze-dried to obtain three kinds of modified alumina powders, wherein the method of freeze-drying is the same as that of implementing Example 1, the material-ball ratio (ratio of raw material to grinding ball) in the ball mill jar is 1:3;

[0033] Then the obtained three kinds of modified alumina powders were mixed and 200 parts of yellow dextrin powders were added, and then the mixed material was added into a ball mill tank with a rotating speed of 550 rpm for 2.5 hours to obtain graded modified alumina powders and yellow dextrin powders. Mixture of dextrin powder;

[0034] When the mixture o...

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