Wax-type 3D material and its preparation method and application

Abstract

The invention relates to a wax-type 3D material and its preparation method and application. The wax-type 3D material is characterized in that it includes a molding material and a supporting material; the molding material is prepared from raw materials including the following mass percentages: 60% to 80% refined paraffin; 5% to 12% micron Crystal wax; 8% to 15% tackifier 1; 3.5% to 15% toughener 1; 1% to 5% filler; hydrocarbon compounds with carbon atoms of 28 to 32 in the refined paraffin account for The molar percentage is 92% to 96%; the support material is prepared from raw materials including the following mass percentages: 60% to 80% silicone-modified polyethylene glycol; 15% to 30% tackifier 2; 2% to 10% toughening agent 2; the toughening agent 2 is selected from at least one of inulin, agar and chitosan. Its molding material has moderate penetration, low volume shrinkage, low linear shrinkage, good toughness, no nozzle blockage during printing, and soft molding. Its support material has low penetration, low volume shrinkage, good alcohol solubility, and is suitable for molding. The material is not damaged and can be easily removed later.

Description

Technical field [0001] The present invention relates to the technical field of 3D printing, and in particular to a wax-type 3D material and its preparation method and application. Background technique [0002] Compared with traditional technology, 3D printing technology has the advantages of saving time and cost, can be quickly customized, can design highly complex structural parts, does not require mold opening, and can repeat sample research many times. Therefore, 3D printing technology has gradually been widely used. It is used in high-precision casting fields such as jewelry processing, dental denture processing, and aerospace. [0003] Currently, a variety of materials and 3D printing technologies have been used in these fields, such as stereolithography (Stereo lithography Appearance, SLA), selective laser sintering (SLS), digital light processing (Digital Light Processing) , DLP) and MultiJet Printing (MJP) and other 3D printing technologies are used to print models ...

AI Technical Summary

Problems solved by technology

[0005] At present, there are not many wax materials used in this kind of technology. In terms of molding materials, the purple wax launched by 3D systems in the United States is expensive, has a high volume shrinkage rate (up to 2.2%), and is relatively brittle, which brings a lot of inconvenience to transportation. , and there are a few domestic manufacturers researching and developing this wax molding material, but there are often unfavorable phenomena such as brittleness, nozzle blockage, molding soft collapse and casting lost wax with ash residue

In terms of supporting materials, the white wax launched by 3D systems in the United States is expensive, and the material has low rigidity, large penetration (up to 1.5dmm), and large shrinkage rate (up to 2%). There are also a few domestic manufacturers targeting this wax. Research and development of type support materials, but there are often phenomena such as plugging and not easy to remove

[0006] Chinese patent CN106118082A discloses a 3D printing machine prepared from paraffin wax, beeswax, epoxy resin, curing agent, viscosity modifier, toughening polymer, high hardness polymer, filling material, dye and phase transfer agent. Molding material, but the material has the following disadvantages: ①The material is added with epoxy resin, high hardness polymer, and the filling material has poor compatibility with wax, and contains a large amount of high molecular polymer, which is difficult to volatilize and decompose, and has poor wax loss performance. Poor; ②The crystallization of the material is rough, resulting in a rough surface of the printed workpiece

[0007] Chinese patent CN106366672A discloses a 3D printing structural material prepared from hydrocarbon wax, basic wax, wax, low molecular weight polyethylene or a combination thereof plus optimized additives as raw materials, but the workpiece printed by this material is relatively Brittle, easily brittle and damaged during transportation

[0008] Chinese patent CN107936582A discloses a 3D printing molding wax prepared from hard wax, soft wax, tackifier, nucleating agent, filler, surfactant, dispersant, antioxidant and toner. , but the material added with monodisperse polystyrene microspheres is only in a dispersed state in the material, and has a high softening point, which is easy to aggregate and clog in the printing nozzle at 65-85 °C

[0009] Chinese patent CN105504836A discloses a wax prepared from paraffin wax, viscosity modifier, stabilizer, tough polymer, plasticizer, high hardness polymer, low shrinkage resin, filler material, dye and phase transfer agent. Type support materials, although the penetration is reduced to a certain extent and the toughness of the material is improved, but the tough polymers and high hardness polymers added in it contain a large amount of high molecular polymers, which are insoluble in water and lower alcohol solutions. It brings great difficulty to the post-cleaning to remove the support material

[0010] Chinese patent CN107556675A discloses a water-soluble support material prepared from polyvinyl alcohol, plasticizer, stabilizer, heat stabilizer, flow modifier and melt bonding enhancer, which can effectively solve the problem of bonding The bad problem is that the support material can be dissolved and removed by immersion in normal temperature water, but this support material can only be used in FDM 3D printers. If it is used in MJP 3D printers, it is prone to plugging problems, and the support material has a relatively high melting point. High, it will cause some damage to the molding material

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