Manufacturing method for three-dimensional product having uniform property using selective laser sintering 3D printer

Patent metadata

Field	Value
Publication number	US-10850443-B2
Application number	US-201715695640-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Dec 28, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

The present invention provides a method of manufacturing a three-dimensional product having uniform mechanical properties using an SLS 3D printer including the steps of: preparing a mixed powder material by mixing resin powder and glass bubbles, wherein the specific gravity of the glass bubbles is from about 0.8 to about 1.2 times that of the resin powder; supplying the mixed powder material to the 3D printer using a roller; and selectively sintering the mixed powder material by irradiating the powder material using a laser based on 3D data of the product to be manufactured.

First claim

What is claimed is:

1. A method of manufacturing a three-dimensional product having uniform mechanical properties using a selective laser sintering 3D printer, the method comprising steps of:
preparing a mixed powder material by mixing resin powder and glass bubbles, wherein a specific gravity of the glass bubbles is from about 0.8 to about 1.2 times that of the resin powder;
supplying the mixed powder material to a 3D printer; and
selectively sintering the mixed powder material by irradiating it using a laser based on 3D data of the product to be manufactured,
wherein the specific gravity of the glass bubble is adjusted by adjusting a ratio of an outer diameter of the glass bubble and an inner diameter of the glass bubble, and
wherein the inner diameter of the glass bubble is 81% to 85% of the outer diameter of the glass bubble.

2. The method of claim 1 , wherein the mixed powder is supplied to the 3D printer using a roller.

3. The method of claim 1 , wherein the specific gravity of the glass bubble is from about 0.9 to about 1.1 times that of the resin powder.

4. The method of claim 1 , wherein the glass bubbles comprise a mixture of glass bubbles having a same outer diameter as the outer diameter of the resin powder and glass bubbles having an outer diameter of from about ⅓ to about ½ of the outer diameter of the resin powder.

5. The method of claim 1 , wherein the resin powder is selected from the group consisting of nylon 6, nylon 66, polypropylene, ABS, PLA, PC, and PMMA.

6. The method of claim 1 , wherein the outer diameter of the resin powder is from about 2 to about 200 μm.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Lee Hee Joon
• Choi Young Ho

Classifications

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• C08K7/28

  Glass · CPC title

• C03C14/008

  the non-glass component being in molecular form · CPC title

• C03C11/002

  Hollow glass particles · CPC title

• B29K2105/165

  Hollow fillers, e.g. microballoons or expanded particles · CPC title