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Large 3D printing support material and preparation method thereof

A supporting material and 3D printing technology, applied in the field of 3D printing materials, can solve the problems of unfavorable economic and environmental protection for the promotion and use of large-scale 3D printing parts, unfavorable mass use, and increased printing costs, so as to achieve low strength and toughness and increase adhesion performance, the effect of reducing the use of materials

Active Publication Date: 2019-01-18
广东华领智能制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main 3D printing support materials on the market adopt water-soluble solutions. Post-processing requires a lot of water and containers, and the process is relatively complicated. From the perspective of economy and environmental protection, it is not conducive to the promotion and use of large-scale 3D printing parts.
The water-soluble materials used in the water-soluble solution are mainly polyvinyl alcohol PVA, polyethylene oxide, etc. These materials are expensive, which increases the printing cost and is not conducive to mass use
Ordinary 3D printing support materials are prepared by extruding and drawing materials, which are mainly used in desktop 3D printing and cannot be used in large-scale 3D printing with screw extrusion

Method used

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  • Large 3D printing support material and preparation method thereof

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specific Embodiment

[0024] A large-scale 3D printing support material provided by the present invention includes the following components in mass percentage:

[0025]

[0026]

[0027] The sum of the mass percentages of each component in the calcium carbonate filler masterbatch and the polyolefin or olefin elastomer material is 100%.

[0028] In some limited embodiments, one or any combination of the following options may be selected:

[0029] The calcium carbonate filling masterbatch is processed by mixing 1500-mesh calcium carbonate powder and PP carrier, and 2000-mesh calcium carbonate powder and LDPE carrier.

[0030] The thermoplastic elastomer is selected from one or more of TPV, TPE, and TPO, and its proportion is 10-30%.

[0031] The foaming agent is azodicarbonamide AC, one or more selected from AC-1600, AC-1601, AC-1500W, and AC-1900; its proportion is 0.1-5%.

[0032] The surface modifying agent is selected from one of maleic anhydride grafted ethylene-octene copolymer and rosi...

Embodiment 1

[0043] Supporting material, including the following components in mass percentage: 1500 mesh calcium carbonate powder plus PE carrier 78% filler masterbatch, 20% TPV, 1% AC-1900 foaming agent, 0.5% DOP , 0.5% antioxidant, the preparation method of this support material is as follows:

[0044]Put the 1500-mesh calcium carbonate powder and the filled masterbatch of PE carrier in a constant temperature drying oven at 80°C for 2 hours. Weigh 39.5KG of filler masterbatch, TPV10KG, 0.5KG of AC-1900 foaming agent, 0.25KG of PE wax, and 0.25KG of antioxidant; then mix in a high-speed mixer for 10 minutes. The uniformly mixed material is added to the hopper of the twin-screw extruder, and the temperature of each section is controlled at: Zone 1: 130°C; Zone 2: 150°C; Zone 3: 160°C; Zone 4: 170°C; Zone 5: 180°C ; Zone 6: 190°C; Zone 7: 200°C; Zone 8: 200°C; Head temperature: 190°C, screw speed 250r / min, the support material was obtained by melt blending extrusion, cooling, water coolin...

Embodiment 2

[0046] Supporting material, including the following components in mass percentage: 2000 mesh calcium carbonate powder plus 78% filler masterbatch of PP carrier, 20% TPO, 1% AC-1900 foaming agent, 0.5% DOP , 0.5% antioxidant. The preparation method of this supporting material is as follows:

[0047] Put the 2000-mesh calcium carbonate powder plus the PP carrier filling masterbatch in a constant temperature drying oven at 80°C for 2h. Weigh 39.5KG of filler masterbatch, 10KG of PE, 0.5KG of AC-1600 foaming agent, 0.25KG of PE wax, and 0.25KG of antioxidant; then mix in a high-speed mixer for 10 minutes. The mixed military printed material is added to the hopper of the twin-screw extruder, and the temperature of each section is controlled at: Zone 1: 130 °C; Zone 2: 150 °C; Zone 3: 160 °C; Zone 4: 170 °C; Zone 5: 180 °C; Zone: 190°C; Zone 7: 200°C; Zone 8: 200°C; Head temperature: 190°C, screw speed 250r / min, the support material was obtained by melt blending extrusion, cooling...

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Abstract

The invention discloses a large 3D printing support material and a preparation method thereof. The large 3D printing support material comprises the following main materials: calcium carbonate fillingmaster batch, a thermoplastic elastomer, a foaming agent, a surface modifier, a plasticizer and an antioxidant, wherein the calcium carbonate filling master batch is taken as a main ingredient, and the thermoplastic elastomer is a binding agent. The main materials such as the calcium carbonate filling master batch and the thermoplastic elastomer are cheap in materials and environmentally friendly;through the addition of the foaming agent, the strength and tenacity of the material are reduced, the material is convenient to disassemble, and through the surface modifier, the adhesiveness of a supporting surface with the main body material is increased; in the application of 3D printing, the support material is high in plasticity, the support material can be completely separated from the mainbody material, the support material can be directly dismantled without the use of a tool due to low strength and tenacity, and the shape of a molding part cannot be damaged due to the stripping of the support material; and compared with a water-soluble support material, the support material is more environmentally friendly and economical since water is not needed, and the support material is moreapplicable for 3D printers using screw extrusion.

Description

technical field [0001] The invention relates to 3D printing materials, in particular to a large-scale 3D printing support material and a preparation method thereof. Background technique [0002] 3D printing mainly includes FDM fused deposition, SLS laser sintering and other technologies. Among them, FDM fused deposition is the most widely used. This technology is to melt polymer plastics and accumulate them layer by layer according to a specific trajectory to print out model products. When there is a suspended or hollow structure in the product, select the support material for printing and molding, and remove it after printing. Support materials play an important role in the printing of special-shaped parts, which is related to the application and promotion of printing. With the development of 3D printing in the direction of large-scale and industrialization, the use of screw extrusion can obtain faster printing speed and plasticizing effect of materials. Considering the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L23/12C08L23/06C08K3/26C08J9/10B33Y70/00
CPCB33Y70/00C08J9/0061C08J9/0071C08J9/103C08J2203/04C08J2300/26C08J2423/06C08J2423/12
Inventor 彭锐龙井刘理辉吴俊坤
Owner 广东华领智能制造有限公司
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