Toilet Die Cad System Key Technology Research

China has become the largest country in produce and consumption of sanitary wares at present. As a typical kind of sanitary wares, the toilet is stepping into the huge numbers of families. However, in the domestic ceramic enterprises, manual modeling is still widely applied in the developing process of the mould of toilets, which resulting in long developing period, high cost and low degree of informationization. It is unfavorable to the fast development of the products and quick response of the market. This mode of craft workshop-based mould manufacture has become the bottleneck of ceramic enterprise's further development.The thesis is concerned mainly on the project of "Research on the rapid integrated manufacturing technology of the complicated ceramic products", which is an important project of the Guangdong science office. On the basis of studying about the production technology of the toilet and key technology of mould CAD modeling, we develop the special-purpose toilet mould CAD system that is based on software Unigraphics for the first time at home, which can realize rapid modeling of many series and types of toilet moulds.It mainly includes the following contents:1. Current research situation of Mould CAD technology and second developing tools are analyzed. According to the commonability of the software and the surface modeling character of sanitary ceramic, UG is selected as developing software platform of this system.2. Research was carried out on the technological process of the toilet manufacturing and the design of the gypsum mould. The whole design process is divided into two major parts, preprocessing model and mould CAD modeling.3. Shrinking rate and project rate of the toilet model and their diversification in all directions are studied. Simplify disposal is carried out on the premise of guaranteeing appearance quality, which is propitious to the postprocessing of the mould.4. Based on research to the key technologies of mould CAD modeling, opinions about the mode of mould extraction and product division as well as the treatment of the external form of the module are put forward: modeling mould based on characteristic extraction, dividing product according to its real form and production demand, treating with the external form of the module on the premise of guaranteeing that the mould is correctly assembled.