Method for printing of three-dimensional objects

Patent metadata

Field	Value
Publication number	US-10940616-B2
Application number	US-201816155211-A
Country	US
Kind code	B2
Filing date	Oct 9, 2018
Priority date	Dec 3, 2002
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

A method for preventing detachment of a three-dimensional object from a printing tray of a printing apparatus is disclosed. The method includes printing a carpet of building material below and around the base of a three-dimensional object to be printed; and printing said three-dimensional object. The portions of the carpet that protrude out of the boundaries of the base of the three-dimensional object are coated with one or more layers of support material to help keep the carpet flexible and adhesive in texture.

First claim

The invention claimed is:

1. A method for improved quality printing of a three-dimensional object, the method comprising:
dispensing one or more building materials in consecutive layers to form a three-dimensional object;
dispensing at least one of said building materials in each consecutive layer to construct a thickening layer of building material having a predetermined thickness around the entire external surface of the three-dimensional object; and
removing said thickening layer after the forming of the three-dimensional object is complete.

2. The method of claim 1 , wherein the thickening layer serves to shield external surfaces of said three-dimensional object from disproportionate curing and/or uneven heating or cooling.

3. The method of claim 1 , wherein the thickening layer serves to prevent accumulation of excess building material on surfaces of the three-dimensional object.

4. The method of claim 1 , wherein the thickening layer serves to prevent or minimize deformation caused by thermal inconsistencies between inner and outer parts of the three-dimensional object, during the formation thereof.

5. The method of claim 1 , wherein the thickening layer serves to yield even finishing of all surfaces of said three-dimensional object.

6. The method of claim 1 , wherein the thickening layer serves to prevent damage to the three-dimensional object caused by knocking or collision of a leveling device used during the printing of the three-dimensional object.

7. The method of claim 1 , wherein said thickening layer comprises a modeling material, a support material or a combination thereof.

8. The method of claim 7 , wherein said thickening layer comprises a homogenous mixture of modeling material and support material.

9. The method of claim 1 , further comprising curing said three-dimensional object and said thickening layer.

Assignees

• Stratasys Ltd

Inventors

• Kritchman Eliahu M
• Gothait Hanan
• Napadensky Eduardo

Classifications

• B33Y40/10

  Pre-treatment · CPC title

• B33Y40/20

  Post-treatment, e.g. curing, coating or polishing · CPC title

• B33Y40/00

  Auxiliary operations or equipment, e.g. for material handling · CPC title

• B29C64/118

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• B41M3/16

  Braille printing (typewriters or selective printing mechanisms for Braille printing B41J3/32) · CPC title