Research on automatic generation technology of double helix-shaped conformal cooling channels for injection mold

The conformal cooling channel is more and more favored by the mold enterprises because of its excellent cooling performance. However, the current design of conformal cooling channel generally has the problems of complex, time-consuming, and error prone design process. The spiral cooling channel is a very important cooling channel structure in injection mold, and its application is extremely common in practical mold engineering cases. For a long time, designers have had to rely on manual construction of spiral cooling channel, which is a cumbersome and inefficient design process. Inspired by the spring structure and based on the design characteristics of spiral cooling channel, this paper puts forward an automatic generation method of conformal cooling channel based on the basic requirements of conformal cooling channel design in engineering practice. The basic idea of this method firstly is to generate the initial trajectory lines and store them in a list in the specified order. Then, based on the initial trajectory line as the basic geometry, a series of control points are generated, and all control points, including the inlet and outlet coordinate points, are sorted. Finally, generate a spline curve based on the control points and scan along the spline curve with the specified cross-section to form cooling channels. Experimental results show that this method can significantly decrease the time of design and guide users to quickly complete the design, while reducing design errors to improve working efficiency.