Three-dimensional printing apparatus, method for three-dimensional printing, and computer-readable storage medium

Patent metadata

Field	Value
Publication number	US-10007253-B2
Application number	US-201414528015-A
Country	US
Kind code	B2
Filing date	Oct 30, 2014
Priority date	Oct 30, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

When first cross-sectional image data representing a target model corresponding to a shape of a three-dimensional printing object, and second cross-sectional image data representing both of the target model and a support model corresponding to a shape of a member assisting the creation of the three-dimensional printing object, are recognized to match each other by at least a predetermined ratio, the second cross-sectional image data is stored in a storage as third cross-sectional image data. In contrast, when the first cross-sectional image data and the second cross-sectional image data are recognized not to match each other by at least the predetermined ratio, synthesis data of the first cross-sectional image data and the second cross-sectional image data is stored in the storage medium as the third cross-sectional image data. The three-dimensional printing object is created based on the third cross-sectional image data.

First claim

What is claimed is:

1. A three-dimensional printing apparatus that creates a three-dimensional printing object based on three-dimensional data representing a shape of the three-dimensional printing object, the three-dimensional printing apparatus comprising:
a processor; and
a storage; wherein
the processor is configured or programmed to create first cross-sectional image data representing a target model corresponding to the shape of the three-dimensional printing object, from a plurality of cross-sectional shapes that are continuous in a predetermined direction, by use of the three-dimensional data;
the processor is configured or programmed to create second cross-sectional image data representing both of the target model and a support model defining a physical structure that includes a shape of a member assisting the creation of the three-dimensional printing object, from a plurality of cross-sectional shapes that are continuous in the predetermined direction, by use of the three-dimensional data;
the processor is configured or programmed to binarize the first cross-sectional image data and the second cross-sectional image data to create first binary cross-sectional image data and second binary cross-sectional image data;
the processor is configured or programmed to index the first binary cross-sectional image data and the second binary cross-sectional image data to create first index data and second index data, each of which includes array elements each having a value of “0” or “1”;
the processor is configured or programmed to compare the first index data and the second index data against each other to determine whether or not the first index data and the second index data are recognized to match each other by at least a predetermined ratio;
the processor is configured or programmed to synthesize the first cross-sectional image data and the second cross-sectional image data to create synthesis data such that a cross-sectional image represented by the cross-sectional image data on an i'th layer of the first cross-sectional image data is located at the position where a cross-sectional image represented by the cross-sectional image data on the i'th layer of the second cross-sectional image data is to be located;
the storage stores the second cross-sectional image data or the synthesis data as third cross-sectional image data;
when the processor determines that the first index data and the second index data are recognized to match each other by at least the predetermined ratio, the second cross-sectional image data is stored in the storage as the third cross-sectional image data;
when the processor determines that the first index data and the second index data are recognized not to match each other by at least the predetermined ratio, the synthesis data is stored in the storage as the third cross-sectional image data; and
the three-dimensional printing object is created based on the third cross-sectional image data.

2. A three-dimensional printing apparatus according to claim 1 , wherein the processor is configured or programmed to compare array element value “1” of the first index data and array element value “1” of the second index data to determine whether or not the first index data and the second index data are recognized to match each other by at least the predetermined ratio.

3. A method for three-dimensional printing that creates a three-dimensional printing object based on three-dimensional data representing a shape of the three-dimensional printing object, the method comprising:
a first step of creating first cross-sectional image data representing a target model corresponding to the shape of the three-dimensional printing object, from a plurality of cross-sectional shapes that are continuous in a predetermined direction, by use of the three-dimensional data;
a second step of creating second cross-sectional image data representing both of the target model and a support model defining a physical structure that includes a shape of members assisting the creation of the three-dimensional printing object, from a plurality of cross-sectional shapes that are continuous in the predetermined direction, by use of the three-dimensional data;
a third step of comparing the first cross-sectional image data and the second cross-sectional image data against each other to determine whether or not the first cross-sectional image data and the second cross-sectional image data are recognized to match each other by at least a predetermined ratio;
a fourth step of storing the second cross-sectional image data in storage as third cross-sectional image data when it is determined in the third step that the first cross-sectional image data and the second cross-sectional image data are recognized to match each other by at least the predetermined ratio, whereas storing synthesis data obtained by synthesizing the first cross-sectional image data and the second cross-sectional image data, such that a cross-sectional image represented by the cross-sectional image data on an i'th layer of the first cross-sectional image data is located at the position where a cross-sectional image represented by the cross-sectional image data on the i'th layer of the second cross-sectional image data is to be located, in the storage as the third cross-sectional image data when it is determined in the third step that the first cross-sectional image data and the second cross-sectional image data are recognized not to match each other by at least the predetermined ratio;
a fifth step of creating the three-dimensional printing object based on the third cross-sectional image data;
a sixth step of binarizing the first cross-sectional image data and the second cross-sectional image data to create first binary cross-sectional image data and second binary cross-sectional image data; and
a seventh step of indexing the first binary cross-sectional image data and the second binary cross-sectional image data to create first index data and second index data each of which includes array elements each having a value of “0” or “1”; wherein
the third step includes the step of comparing the first index data and the second index data against each other to determine whether or not the first index data and the second index data are recognized to match each other by at least a predetermined ratio; and
the fourth step includes the step of storing the second cross-sectional image data in the storage as the third cross-sectional image data when it is determined that the first index data and the second index data are recognized to match each other by at least the predetermined ratio, whereas storing the synthesis data in the storage as the third cross-sectional image data when it is determined that the first index data and the second index data are recognized not to match each other by at least the predetermined ratio.

4. A method for three-dimensional printing according to claim 3 , wherein the third step includes the step of comparing array element value “1” of the first index data and array element value “1” of the second index data to determine whether or not the first index data and the second index data are recognized to match each other by at least the predetermined ratio.

5. A non-transitory computer-readable storage medium on which a program that causes a computer to execute a method for three-dimensional printing, the method comprising:
a first step of creating first cross-sectional image data representing a target model corresponding to a shape of a three-dimensional printing object, from a plurality of cross-sectional shapes that are continuous in a predetermined direction, by use of three-dimensional data;
a second step of creating second cross-sectional image data representing both of the target model and a support model defining a physical structure that inclu

Assignees

• Roland Dg Corp

Inventors

• Hotta Tomoyuki
• Kobayashi Kouichi

Classifications

• G05B19/4099 Primary

  Surface or curve machining, making three-dimensional [3D] objects, e.g. desktop manufacturing · CPC title

• G05B2219/49023

  3-D printing, layer of powder, add drops of binder in layer, new powder · CPC title

• B29C64/112

  using individual droplets, e.g. from jetting heads · CPC title