Abstract:

In this study， the precision of central venous catheter extrusion mold was taken as a research object， and the accurate cross⁃section shape and size of die was obtained from the analysis of a reverse deformation technology with the aid of the Polyflow software. A three⁃factor and two⁃level orthogonal experiment simulation were carried out by using the parameters of compression angle， mold length and clearance angle， and the optimal central venous catheter die runner structure parameters were obtained from the variance analysis. The simulation results were further verified by the actual production. The results indicated that the extrusion die had a high yield and could be used as a reference for the development of related extrusion dies.

Key words: extrusion molding, central venous catheter, Polyflow software, orthogonal test