# US 6,327,553 B1 · Injection mold design system and injection mold design method

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- Number: US 6,327,553 B1
- Document ID: US6327553B1
- Status: Granted
- Kind: B1
- Application number: 09/569,265
- Filed: 2000-05-11
- Granted: 2001-12-04
- Earliest claimed: 1995-11-02
- Assignees: Fujitsu Limited
- Inventors: Shusaku Nishiyama; Shingo Yamaguchi; Tatsuo Kimura; Masayuki Imakado; Naoki Asano; Fumihiko Makiuchi
- Web page: https://patentgrep.com/patent/US6327553B1

## CPC

- B29C 33/3835: {Designing moulds, e.g. using CAD-CAM}
- G05B 19/4099: Surface or curve machining, making three-dimensional [3D] objects, e.g. desktop manufacturing
- B29C 45/26: Moulds
- G05B 2219/35044: Tool, design of tool, mold, die tooling
- G05B 2219/35078: Do not load non necessary or obstructive parts of drawing, remove from screen
- Y02P 90/02: Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

An injection mold design method for correcting a profile of a product to be fabricated into a releasable profile from a mold to design an injection mold based on a corrected product shape, utilizing a storage device for storing information of the product shape and mold profile, a display device for displaying the product shape or the mold profile on a screen based on the information read from the storage device, an input device for inputting designation information necessary for correction of the product shape or the mold profile, and a controlling device for unloading information of lines or planes being obstructive to correction of the product shape and the mold profile in the storage device in response to the designation information input by the input device. The method comprises removing lines or planes from the screen, and replotting the lines or the planes on the screen in terms of the information of lines or planes unloaded into the storage device after the correction operation of the product shape or the mold profile is completed.

## Claims

### Claim 1

An injection mold design method for designing the core and the cavity by correcting the profile of the product to be fabricated into a releasable profile from the mold, then arranging the corrected product shape in the mold block being displayed on the screen to provide a cavity corresponding to the product shape in the mold block, and then splitting the mold block, said method comprising:
detecting a bottom of the cavity in the core side;
extending a peripheral portion of the bottom along a mold opening direction so as to select candidates of the split line for splitting the core of the mold block into a nest structure;
displaying a result of resin superplasticized analysis of the mold superposedly on a perspective view of the mold viewed from the mold opening direction;
arranging a gas vent for exhausting gas in a location where a resin reaches finally based on the result of the resin superplasticized analysis;
patternizing gate structures of the mold into plural groups in advance;
registering the plural groups of patternized gate structures in a storing device; and
selecting one of the stored patternized gate structures by an operator in compliance with procedures displayed on a screen.

### Claim 2

An injection mold design method for designing the core and the cavity by correcting the profile of the product to be fabricated into a releasable profile from the mold, then arranging the corrected product shape in a mold block being displayed on the screen to provide a cavity corresponding to the product shape in the mold block, and then splitting the mold block, said method comprising:
detecting a bottom of the cavity in the core side;
extending a peripheral portion of the bottom along a mold opening direction so as to select candidates of the split line for splitting the core of the mold block into a nest structure;
displaying a result of resin superplasticized analysis of the mold superposedly on a perspective view of the mold viewed from the mold opening direction;
arranging a gas vent for exhausting gas in a location where resin reaches finally based on the result of the resin superplasticized analysis;
patternizing ejector pin structures of the mold into plural groups in advance;
registering the plural groups of patternized ejector pin structures in a storing device; and
selecting one of the stored patternized ejector pin structures by an operator in compliance with procedures displayed on a screen.