# US 5,812,402 A · Injection mold design system and injection mold design method

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- Number: US 5,812,402 A
- Document ID: US5812402A
- Status: Granted
- Kind: A
- Application number: 08/614,055
- Filed: 1996-03-12
- Granted: 1998-09-22
- 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/US5812402A

## 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 system 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, comprising storing means for storing information of product shape and mold profile, displaying means for displaying the product shape or the mold profile on a screen based on the information read from the storing means, inputting means for inputting designation information necessary for correction of the product shape or the mold profile, and controlling means for unloading information of lines or planes being obstructive to correction of the product shape and the mold profile into the storing means in response to the designation information input by the inputting means, removing the lines or the planes from the screen, and replotting the line or the planes on the screen in terms of the information of lines or planes unloaded into the storing means after the correction operation of the product shape or the mold profile is completed.

## Claims

### Claim 1

An injection mold design system for correcting a profile of a product to be fabricated into a releasable profile from a mold so as to design an injection mold based on a corrected product shape, said system comprising:
first storing means for storing information of product shape or and mold profile;
displaying means for displaying the product shape or the mold profile on a screen based on the information read from the first storing means;
inputting means for inputting designation information necessary for correction of the product shape or the mold profile; and
controlling means for unloading information of lines or planes being obstructive to correction of the product shape and the mold profile into the first storing means in response to the designation information input by the inputting means, removing the lines or the planes from the screen, and replotting the line or the planes on the screen in terms of the information of lines or planes unloaded into the first storing means after the correction operation of the product shape or the mold profile is completed; and
second storing means for storing first design items used for correcting the product shape into the releasable profile from the mold, second design items used for designing the mold, and third design items used for forming manufacturing jigs of the mold.

### Claim 2 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means for forming dot lines on a constituting plane of the product being perpendicular to the mold opening direction, and then detecting whether or not the dot lines can be projected onto other constituting plane in the mold opening direction.

### Claim 3 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means for connecting an outermost peripheral profile of the product viewed from the mold opening direction and line segments of the product designated by an operator and extracting a split line of the product occupying a certain space may be provided.

### Claim 4 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means for detecting a flat plane constituted with the split line occupying a certain space, then connecting the detected flat plane and one of a circular cylinder surface, a circular cone surface, and a free-form surface all being designated by an operator, and then forming a split plane to split the product into the cavity and the core.

### Claim 5 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means detecting the designated location and a height of the ejector pin for ejecting the product from the core and then forming a hole profile with dimensions input by the designer on the designated location when an operator instructs a concerned location against the profile of the core viewed in the mold opening direction.

### Claim 6 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means for displaying on one screen a profile of a mold base constituting the mold and an instruction window having thereon boxes in which respective dimensions of individual constituting parts of the mold base are input, and means for forming data of the mold base in compliance with the input dimensions when an operator inputs respective dimensions in the boxes of the instruction windows of the displaying means.

### Claim 7 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means for storing at least information concerning display color of characters, lines, symbols and regions, information concerning output method of design information of the mold, and information concerning reference values required for each design of the mold, and the storing means may be composed of an erasable and writable read-only memory.

### Claim 8 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means for designing the mold by using data in groups with selected name when an operator selects group name of data necessary for design of the mold in compliance with design items of the mold after the operator allots respective names to groups of data relating to the design items of the mold.

### Claim 9 (depends on 1)

An injection mold design system as claimed in claim 1, further comprising means for detecting a separating distance between a particular hole and another hole of the mold parts, and then comparing the separating distance between the particular hole and the other hole with a preliminary set separating reference value.

### Claim 10

An injection mold design system for correcting a profile of a product to be fabricated into a releasable profile from a mold so as to design an injection mold based on a corrected product shape, said system comprising:
storing means for storing information of product shape or and mold profile;
displaying means for displaying the product shape or the mold profile on a screen based on the information read from the storing means;
inputting means for inputting designation information necessary for correction of the product shape or the mold profile;
controlling means for unloading information of lines or planes being obstructive to correction of the product shape and the mold profile into the storing means in response to the designation information input by the inputting means, removing the lines or the planes from the screen, and replotting the line or the planes on the screen in terms of the information of lines or planes unloaded into the storing means after the correction operation of the product shape or the mold profile is completed; and
means for forming an ejected profile having a range of manufacturing jigs of the mold parts as a sectional shape and transferring a profile of the mold parts to the ejected profile when an operator designates a range of the manufacturing to be used for manufacturing the mold parts against the displayed mold parts.