Abstract:

To achieve the forward engineering design of the mold cup development and acquire the characteristic curves which could control the bra cup surface type, 3-D scanner was used to acquire point cloud data of the mold cup, and the mold cup model was built with reserve engineering software, and then 26 mold cup internal and external surface curves were obtained accirding to the feature points and maximum points and minimun points distrebution, 5 mold cup interior and exterior surface characteristic curves were extracted to demonstrate the feature information of the cup surface. The experimental results show that the discrete degree of different geometric parameters' distributions of model cup structure characteristic curves is more uniform than that of angle characteristic curves. Therefore, the model cup structure characteristic curves can reflect more morphological characteristics of different types of mold cups surface. By fitting, the relationships between arc length of characteristic curves and the cup depth vere achieved. The control on the curve surface morphological structure could be realized by changing the geometric parameters on the morphological characteristic curves.

Key words: bra mold cup, angle curve, structure curve, discerte degree, distribution location