ANALYSIS OF FLEXIBLE FILM MEMBER DEFORMING PROCESS AND APPARATUS THEREOF, ANALYSIS OF BLOW TYPE MOLDING PROCESS AND APPARATUS THEREFOR AND MANUFACTURE OF BLOW TYPE MOLDED PRODUCT

摘要

PROBLEM TO BE SOLVED: To easily and efficiently form the shape of a mold by modeling at least a part of a cavity shape model by using the function describing the shape of the mold. ;SOLUTION: For example, when a 1×7 order B spline patch is used when a surface is defined, the surface can be defined by data called the so-called nodal point vector determining 2×8 control point data and weighing function. Herein, the number of control points is 2×8 consisting of a 8 points constituting a curve 10 and 8 points constituting a curve 11 and the nodal point vector determining the degree of the proximity of a curved surface 12 is set to data of a 1×5 size and a 1×10 size. Since the control point data is displayed by a system of coordinates data (x, y, z) within a three-dimensional space, the magnitude of data becomes real number data of the number of control points ×3. Therefore, the number of data necessary for defining a curved surface by CAD is real number data 63. Therefore, data input work is simplified to a large extent.;COPYRIGHT: (C)1998,JPO