ANSYS-based Design Of Sprue Runner In Extrusion Tooling Outlet For Extrusion Forming The Function Part Of Plastic Profiles

In order to adapt the plastic profile market's requests of high speed and stability for the extrusion die,we should improve the situation that the design of sprue runner in the extrusion tooling for extrusion forming the complex geometry functional part of plastic profiles was used to depend on experiences, in which the instable operation often occurred during the process of extrusion. A study was made on the rating design of the sprue runner by using ANSYS software and based on the design criteria that every subregion of profile in the outlet section of extrusion die has equal average flow velocity. A method for the numerical value design was proposed , which was used to simulate the sprue runner structure of the complex geometry functional part and corner of plastic profiles.For the complex geometry functional part of a die, the flow fields of two typical functional part flow channels were simulated by using ANSYS. We chose a best design suitable for the manufacturing processes ,and combining the finite element numerical analysis method with the optimizing method ,the main parameters of the functional part were optimized. Then, choose the best sprue runner structure according to the difference of average flow velocity in the outlet section of extrusion.For the corner and the point of intersection of the main sprue runner of a die, an estimation criteria , the subregion of different kinds of sprue runner in the outlet section of extrusion die has equal average flow velocity, was provided by different kinds of design of different kinds of sprue runner.The conclusions and methods got in the paper are very valuable for not only improving the stability design of the complex geometry sprue runner in the extrusion tooling, but also the adjustment and repairing of the dies.