Boots – shoes – and leggings
Patent
1990-07-10
1993-06-01
Smith, Jerry
Boots, shoes, and leggings
364138, 364188, 425135, G06F 1546, G05B 1502
Patent
active
052166171
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a group management system for injection molding machines, which is capable of rapidly and accurately determining optimum molding conditions for a plurality of injection molding machines, without the need of using an expensive apparatus.
BACKGROUND ART
When manufacturing molded articles by injection molding machines, a large number of molding conditions such as mold clamping force, injection speed, hold pressure, hold time, resin temperature, mold temperature, back pressure, screw rotating speed, suckback amount, cooling time, etc. must be determined. Therefore, in general, injection molding is first carried out by way of trial under the molding conditions which are tentatively determined on the basis of expert knowledge and experience in accordance with the type of article to be molded. Thereafter, one or more molding conditions are modified in accordance with the expert knowledge and experience, depending on the type of molding defect appearing in the resultant molded article, such as flash, sink mark, warp, weld mark, flaw mark, etc., and then injection molding is tried again. This molding condition determination process is repeatedly executed to find optimum molding conditions that do not cause any molding defect. Accordingly, the determination of optimum molding conditions involves considerable labor. In particular, when producing various molded articles of different types by using a plurality of injection molding machines having different structures from one another, the molding condition determining process must be performed for each of the injection molding machines, requiring much labor to determine the optimum molding conditions.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a group management system for injection molding machines, which is capable of rapidly and accurately determining optimum molding conditions for a plurality of injection molding machines without the need of using an expensive apparatus.
To achieve the above-mentioned object, a group management system for injection molding machines of the present invention comprises a plurality of injection molding machines, a general-purpose high-performance computer connected to the injection molding machines, the computer having a multi-user operating system and adapted to use a molding condition determining program and a molding condition determining database, and input means for inputting data indicative of a type of a molding defect appearing in a molded article produced by each of the injection molding machines. The general-purpose high-performance computer is operable to automatically modify molding conditions of the individual injection molding machines in accordance with the data indicative of the type of molding defect, through the use of the molding condition determining program and database.
According to the present invention, by inputting data indicative of a type of molding defect occurring in the molded articles, produced by the plurality of injection molding machines, to the single general-purpose high-performance computer, the molding conditions of each of the injection molding machines is automatically modified online by the computer adapted to use the molding condition determining program and database. This makes it possible to rapidly and accurately determine optimum molding conditions for each injection molding machine. Further, since the multi-user operating system is installed in the single general-purpose high-performance computer, the individual processes of determining the molding conditions for the plurality of injection molding machines can be executed by the single computer in an independent and substantially simultaneous manner. Moreover, the group management system can be constructed at a relatively low cost, because individual computers are not required, each having the mold condition determining program and database, for the injection molding machines. Further, since the molding condition determining program and database are c
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Kamiguchi Masao
Kubota Kazuo
Fanuc Ltd.
Gordon Paul
Smith Jerry
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