Preparing method for fast forming epoxy resin coated sand used for 3D printing
An epoxy resin and 3D printing technology, which is applied to casting molding equipment, casting molds, cores, etc., can solve the problems of severe sand sticking in parts of castings, serious sand sticking on the surface of castings, and low precision of castings, and achieve low production costs. Energy saving and high precision effect
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[0023] Example 1
[0024] (1) Pretreatment of gemstone sand: In the mixer, add 16mL ethanol, 3-aminopropyltriethoxysilane: 4g, mix well, then add gemstone sand: 83g, turn on the grinder at 180 rpm , Grind for 25 minutes and dry to obtain pre-treated orb sand;
[0025] (2) 3D printing rapid prototyping epoxy resin coated sand: In the mixer, add separately, pre-treated orb sand: 80g, epoxy resin: 5g, melamine: 0.5g, fatty acid amide: 0.5g, turn on the mixer at 200 Rpm, stirring for 10 min, and then adding acetone: 18 mL, turning on the mixer at 200 rpm, grinding for 20 min, and drying to obtain 3D printing rapid prototyping epoxy resin coated sand.
Example Embodiment
[0026] Example 2
[0027] (1) Pretreatment of precious bead sand: add 20mL ethanol, 3g of 3-aminopropyltriethoxysilane: 3g in a blender, and mix well, then add in precious bead sand: 81g, turn on the grinder at 180 rpm , Grind for 25min and dry to obtain pre-treated orb sand;
[0028] (2) 3D printing rapid prototyping epoxy resin coated sand: In the mixer, add separately, pre-treated orb sand: 81g, epoxy resin: 4g, melamine: 0.4g, fatty acid amide: 0.4g, turn on the mixer at 200 Rpm, stirring for 10 min, then adding acetone: 19 mL, turning on the mixer at 200 rpm, grinding for 20 min, and drying to obtain 3D printing rapid prototyping epoxy resin coated sand.
Example Embodiment
[0029] Example 3
[0030] (1) Pretreatment of gemstone sand: In the mixer, add 13mL ethanol, 6g of 3-aminopropyltriethoxysilane, and stir evenly, then add gemstone sand: 84g, turn on the grinder at 180 rpm , Grind for 25min and dry to obtain pre-treated orb sand;
[0031] (2) 3D printing rapid prototyping epoxy resin coated sand: In the mixer, add separately, pre-treated orb sand: 82g, epoxy resin: 3g, melamine: 0.3g, fatty acid amide: 0.3g, turn on the mixer at 200 Rpm, stirring for 10 min, and then adding acetone: 18 mL, turning on the mixer at 200 rpm, grinding for 20 min, and drying to obtain 3D printing rapid prototyping epoxy resin coated sand.
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