Method of manufacturing 3-dimensional model object using resin granular material
AssigneeToray Industries, Inc.
InventorsTomohiko Nakamura, Hirokazu Iwata, Yota Okuno, Itaru Asano
Life of this patent
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Abstract
A method of manufacturing a 3-dimensional model object by a powder bed fusion method using a resin granular material, in which the resin granular material comprises a resin powder (A) and a flow aid (B), a sphericity of the resin powder (A) is 80 or more and 100 or less, the resin powder (A) has a D80 particle size of 60 μm or less and a D20 particle size of 1 μm or more, the flow aid (B) is contained at an amount of more than 0.01 part by mass and less than 5 parts by mass with respect to 100 parts by mass of the resin powder (A), and steps (a) to (c) are performed in this order repeatedly.
Claims9
A method of manufacturing a 3-dimensional model object by a powder bed fusion method with a resin granular material, wherein the resin granular material comprises a resin powder (A) and a flow aid (B), a sphericity of the resin powder (A) is 90 or more and 100 or less, the resin powder (A) has a D80 particle size of 55 μm or less, a D20 particle size of 1 μm or more and a D50 particle size of 1 μm or more and 40 μm or less, a BET specific surface area of the resin powder (A) is 5m2/g or less, a ratio of the BET specific surface area of the resin powder (A) to a theoretical specific surface area calculated from the D50 particle size is 5 or less, the flow aid (B) is contained at an amount of more than 0.01 part by mass and less than 5 parts by mass with respect to 100 parts by mass of the resin powder (A), and steps (a) to (c) are repeatedly performed in this order:
- (a) a stage of a vessel for forming the 3-dimensional model object is lowered by an amount in a range of 0.01 mm or more and less than 0.10 mm,
- (b) the resin granular material is supplied to the vessel for forming the 3-dimensional model object to layer the resin granular material, and
- (c) a thermal energy is imparted to the resin granular material layered at a layering height of 0.01 mm or more and less than 0.10 mm to selectively melt and sinter the resin granular material.
A method of manufacturing a 3-dimensional model object by a powder bed fusion method with a resin granular material, wherein after performing a step for producing the resin granular material by dry blending a flow aid (B) at an amount of more than 0.01 part by mass and less than 5 parts by mass with respect to 100 parts by mass of a resin powder (A) having a sphericity of 90 or more and 100 or less, a D80 particle size of 55 μm or less, a D20 particle size of 1 μm or more, a D50 particle size of 1 μm or more and 40 μm or less, a BET specific surface area of 5 m2/g or less, and a ratio of the BET specific surface area of the resin powder (A) to a theoretical specific surface area calculated from the D50 particle size is 5 or less, steps (a) to (c) are repeatedly performed in this order:
- (a) a stage of a vessel for forming the 3-dimensional model object is lowered by an amount in a range of 0.01 mm or more and less than 0.10 mm,
- (b) the resin granular material is supplied to the vessel for forming the 3-dimensional model object to layer the resin granular material,
- (c) a thermal energy is imparted to the resin granular material layered at a layering height of 0.01 mm or more and less than 0.10 mm to selectively melt and sinter the resin granular material, and
- (d) forming a 3-dimensional model object which has a surface roughness of 20 μm or less in a height direction in which the resin granular material is layered.
Dependencies are inferred from the claim text.