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In this paper, reverse engineering and forward thinking design combines presented blow mold CAD system's overall design process , completed a critical blow mold CAD system procedures for the preparation and development of a prototype system . Application of Reverse Engineering in surface digitization, data reduction , surface reconstruction , surface smoothing techniques for blow molded parts generated by the scan point cloud into the feature region , to create a feature -surface , and in UG sewn into entities ; to UG system for the secondary development platform , through the UG / Open API for developing methods of analysis , in the UG WAVE technology and virtual assembly technology , property management techniques applied to the blow mold CAD system development process , completed the blow mold CAD system interface design and development, interface and parameter passing between programs , blow molded parts import and proportionate correction model to achieve the upper and lower mold design and blow molded parts model full correlation ; through research UG secondary development process call database method, the standard parts of the relevant design parameters stored in the database, using ODBC technology to achieve the blow mold CAD system, standard components in the database calls and parameter driven three-dimensional model of the standard pieces of updates . By running instance is given to verify the relevant theoretical methods and the development system is correct and practical .
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