3D printing gypsum powder and preparation method thereof
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A 3D printing and gypsum powder technology, which is applied in the field of 3D printing gypsum powder and its preparation, can solve the problems of uneven powder spreading of printers, poor fluidity of gypsum powder, and rough surface of products, so as to achieve smooth surface, no concave-convex pits, easy molding effect
Pending Publication Date: 2021-11-19
河南永泰石膏有限公司
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Problems solved by technology
However, due to the characteristics of gypsum itself, there are deficiencies in the 3D printing process. First, the fluidity of the gypsum powder is poor, and the printer spreads the powder unevenly; second, it is easy to cause poor strength of the product and is not easy to shape; There are concave and convex pits
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preparation example Construction
[0051] Wherein, the preparation method of modified toughening fiber comprises the following steps:
[0052] S1 pretreatment: Dissolve the surface modifier in absolute ethanol, and then spray it on the surface of SF in the form of spray. After the ethanol volatilizes, put it in an oven and dry it at 107°C for 4 hours. Put the resin PLA and PBS in the oven Dry at 83°C for 2 hours; the surface modifier is stearic acid, and the mass ratio of the surface modifier, SF, PLA, and PBS is 1:85:15:5;
[0053] S2 Mixing: mix the pretreated components, add them to the torque rheometer and melt mix; the mixing conditions are: mixing temperature 190°C, mixing speed 30r / min, mixing time 8min;
[0054] S3 Compression Molding: Press the mixed materials that have been compacted into semi-finished boards on a flat vulcanizing machine; the molding conditions are: molding temperature 185 ° C, molding pressure 10 MPa, molding time 6 minutes, cooling time 5 minutes;
[0055] S4 shredding: shredding ...
Embodiment 1
[0059] A kind of 3D printing gypsum powder, the 3D printing gypsum powder includes the following components in parts by mass:
[0060] 80 parts of α gypsum powder,
[0061] Talcum powder 10 parts,
[0062] 1 part of white Portland cement,
[0063] Modified toughening fiber 5 parts,
[0064] 0.1 parts of rubber powder,
[0065] Coagulant regulator 0.3 parts.
Embodiment 2
[0067] A kind of 3D printing gypsum powder, the 3D printing gypsum powder includes the following components in parts by mass:
[0068] 82 parts of α gypsum powder,
[0069] 8 parts talcum powder,
[0070] 4 parts of white Portland cement,
[0071]Modified toughening fiber 2 parts,
[0072] 0.2 parts of rubber powder,
[0073] Coagulant regulator 0.2 parts.
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Abstract
The invention discloses a 3D printing gypsum powder and a preparation method thereof. The 3D printing gypsum powder is prepared from, by mass, 80-90 parts of alpha gypsum powder, 5-10 parts of talcum powder, 1-5 parts of white Portland cement, 1-5 parts of modified toughening fiber, 0.1-0.5 part of rubber powder and 0.1-0.3 part of a thickening time control agent. The preparation method comprises the following steps: firstly, mixing the talcum powder, the white Portland cement, the modified toughening fiber, the rubber powder and the thickening time control agent in a V-shaped mixer for 20-40 min, then adding the alpha gypsum powder, feeding into a horizontal mixer, mixing for 0.5-1.5 h, and uniformly mixing the components to obtain the required 3D printing gypsum powder. The method is scientific and reasonable in design, and when the 3D printing gypsum powder is used for 3D printing, due to the fact that the fluidity of the gypsum powder is good, powder laying of a printer is uniform; a printed product is high in strength and easy to form; and the surface of the product is smooth and has no concave-convex pits.
Description
technical field [0001] The invention relates to the technical field of gypsum powder production, in particular to a 3D printing gypsum powder and a preparation method thereof. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is based on digital model files, using powdered metal, plastic, ceramics, sand, silicon carbide powder, gypsum materials and other bondable materials, through layer-by-layer printing. techniques for constructing objects. 3D printing is based on the three-dimensional data of the model, and the material can be directly printed layer by layer through the printer to generate the entity. 3D printing is usually achieved using digital technology material printers. Materials are not only the foundation of 3D printing technology, but also the bottleneck restricting the development of 3D printing technology. Due to the characteristics of 3D printing, the materials used need to meet specific performance requirements such as...
Claims
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Application Information
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