Stereoscopic modeling apparatus, method of manufacturing stereoscopic modeled product, and non-transitory recording medium

Patent metadata

Field	Value
Publication number	US-10464241-B2
Application number	US-201514968967-A
Country	US
Kind code	B2
Filing date	Dec 15, 2015
Priority date	Jan 27, 2015
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A stereoscopic modeling apparatus including a modeling part, a modeling unit, and a controller is provided. The modeling part forms a powder layer with a powder. The modeling unit discharges droplets of a modeling liquid on the powder layer to form a modeling layer in which particles of the powder are bonded. The controller causes the modeling part and the modeling unit to repeat forming the powder layer and the modeling layer, respectively, to sequentially laminate the modeling layer to form a stereoscopic modeled product. The droplets include a preceding droplet and a succeeding droplet sequentially discharged to adjacent positions on the powder layer, and the succeeding droplet is discharged after the preceding droplet is discharged and within a time period in which a contact angle between the preceding droplet impacted on the powder layer and the powder in the powder layer remains greater than 90 degrees.

First claim

What is claimed is:

1. A stereoscopic modeling apparatus, comprising:
a modeling part to form a powder layer with a powder;
a modeling unit to discharge droplets of a modeling liquid on the powder layer to form a modeling layer in which particles of the powder are bonded; and
a controller to cause the modeling part and the modeling unit to repeat forming the powder layer and the modeling layer, respectively, to sequentially laminate the modeling layer to form a stereoscopic modeled product,
wherein the droplets include a preceding droplet and a succeeding droplet, the modeling unit being configured to sequentially discharge the preceding droplet and the succeeding droplet to adjacent positions on the powder layer, and the modeling unit being configured to discharge the succeeding droplet after the preceding droplet is discharged and within a time period in which a contact angle between the preceding droplet impacted on the powder layer and the powder in the powder layer remains greater than 90 degrees.

2. The stereoscopic modeling apparatus of claim 1 , wherein the modeling unit is configured to discharge the succeeding droplet after the preceding droplet is discharged and within a time period in which the contact angle remains greater than 90 degrees and less than 110 degrees.

3. The stereoscopic modeling apparatus of claim 2 , wherein the modeling unit is configured to initially discharge droplets of the modeling liquid on the powder layer at an initial static contact angle, the initial static contact angle between the modeling liquid and the powder in the powder layer being 110 degrees or more.

4. The stereoscopic modeling apparatus of claim 1 , wherein the modeling part is configured to form the powder layer with a powder including:
a base material; and
an organic material covering the base material.

5. The stereoscopic modeling apparatus of claim 4 , wherein the modeling unit is configured to discharge droplets of the modeling liquid, the modeling liquid-including a cross-linker cross-linkable with the organic material.

6. The stereoscopic modeling apparatus claim 1 , wherein the modeling unit includes at least one liquid discharge head, configured to discharge droplets of a modeling liquid on the powder layer.

7. The stereoscopic modeling apparatus claim 1 , wherein the modeling unit includes a plurality of liquid discharge heads, configured to discharge droplets of a modeling liquid on the powder layer.

8. The stereoscopic modeling apparatus claim 2 , wherein the modeling unit includes a plurality of liquid discharge heads, configured to discharge droplets of a modeling liquid on the powder layer.

9. The stereoscopic modeling apparatus claim 3 , wherein the modeling unit includes a plurality of liquid discharge heads, configured to discharge droplets of a modeling liquid on the powder layer.

Assignees

• Sasaki Takafumi
• Yamaguchi Takeo
• Ricoh Co Ltd

Inventors

• Sasaki Takafumi
• Yamaguchi Takeo

Classifications

• B22F12/55

  Two or more means for feeding material · CPC title

• B22F12/224

  for motion along a direction within the plane of a layer · CPC title

• B22F12/222

  for motion along a direction orthogonal to the plane of a layer · CPC title

• B22F10/50

  Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up · CPC title

• B22F10/14

  by jetting of binder onto a bed of metal powder · CPC title