Research On The Intelligent Design Technology Of Injection Mould Cooling System Based On KBE

Cooling system is one of the main function structures in the injection mould, its effect is to take the cooling medium into the mould through the rational structure water channel, and to take away large of the heat which is released by molten plastic in the process of solidification molding, in order to make the product be cooled uniform and quickly and to reduce the cooling time. That whether or not the cooling system is designed reasonably not only influences the dimensional precision and quality of the product, but also the production efficiency. Therefore it is very important for promoting the development of mould design and manufacture to research on the advanced technology and method of designing cooling system of injection mould.The theories and knowledge of injection mould design is summarized completely in the paper. According to the design characteristics and principles of cooling system structure design, the intelligent design technology of injection mould cooling system based on KBE is studied with the related theories of knowledge engineering and intelligent design.Through summarizing, refining and classifying the design knowledge and expert experiences in cooling system design, the rules and cases of cooling system design are represented by the knowledge model based on fuzzy theory and the code system based on feature. And according to the characteristics of different type knowledge, the knowledge database of cooling system with tree structure is established. A visual management interface of knowledge database is designed to manage and utilized knowledge conveniently. The data of knowledge database is able to be searched, added and amended directly by applying ADO technology. Aiming at the characteristics of large amount calculation in cooling system design, the object oriented technology is used in the packaging of cooling system design calculation as a single module, which makes the designer get rid of the tedious traditional manual calculation. Researching on the intelligent reasoning technology deeply, the reasoning mechanism of cooling system intelligent design guided by FR and CBR is established. Through transferring the data from the knowledge database the given conditions and fuzzy premises are compared and matched to realize the reasoning of intelligent design of cooling system by using the technology of FR. With the technology of case-based reasoning, the most similar case is achieved as the reasoning project by calculating the similarity and matching the feature with the feature indexes. The insufficiency of single reasoning method in the aspects of rule representation and case matching is remedied by this reasoning mechanism.Finally, the flow and method of the intelligent design of injection mould cooling system is present through an example of plastic cup. The results show that the cooling system designed by applying the intelligent design technology is reasonable and feasible.