Computer aided design system and three-dimensional design method using the same and storing medium

A three-dimensional design method which is able to generate three-dimensional drawings in which attribute information are added to three-dimensional shape data of a synthetic resin moldings by use of a computer aided design system and then displaying images of the three-dimensional drawings on a screen, the method comprising:

• designating type of grains, and planes of the three-dimensional shape on which the grains are to be formed for the computer aided design system as the attribute information;
• and
• displaying images of the three-dimensional shape to a designate plane of which grain information are added on the screen of the computer aided design system based on such designation.

A three-dimensional design method which is able to generate three-dimensional drawings in which attribute information are added to three-dimensional shape data of a synthetic resin moldings by use of a computer aided design system and then displaying images of the three-dimensional drawings on a screen, the method comprising:

• designating planes of the three-dimensional shape as parting line disable planes of a split mold used for injection molding of the moldings for the computer aided design system as the attribute information;
• and
• excepting selected split planes which intersect with the parting line disable planes if candidates of split planes of the split mold are selected in the computer aided design system.

A three-dimensional design method which is able to generate three-dimensional drawings in which attribute information are added to three-dimensional shape data of a synthetic resin moldings by use of a computer aided design system and then displaying images of the three-dimensional drawings on a screen, the method comprising:

• executing design change with use of the computer aided design system;
• and
• storing information of design change parts as the attribute information in the computer aided design system while taking correspondence between the information of the design change parts before and after design change, and then displaying three-dimensionally different parts between other of the information of the design change parts before and after design change and one of the information thereof simultaneously while discriminating the other of the information from one of the information on a basis of one of the information of the design change parts before and after design change according to the information of the design change parts.

A method comprising:

• calculating a thickness distribution of moldings based on a three-dimensional shape data;
• and
• adding information indicated a calculated thickness distribution to corresponding parts of images of the moldings which are displayed in three-dimensions as attribute information.

A method comprising:

• setting a default value on type of print, shape, and print position on a three-dimensional shape for moldings as attribute information;
• and
• displaying images of the three-dimensional shape based on variations of the set default values.

A method comprising:

• designating types of grains, and planes of a three-dimensional shape for moldings on which the grains are to be formed as attribute information;
• and
• displaying images of the three-dimensional shape to a designated plane of which grain information is added based on the designated planes.

A method comprising:

• designating planes of a three-dimensional shape for moldings as parting line disable planes of a split mold used for injection molding of the moldings as attribute information;
• and
• excepting selected split planes which intersect with the parting line disable planes if candidates of split planes of the split mold are selected.