The Filling Fimulation And Mold Design Of The Spin Spindle Of The Vehicle Seat Belts

With the features of high productivity, high dimensional accuracy, and high strength and hardness due to its dense structure, die casting is being widely applied in industrial production. The die casting mold plays an important role in die-casting production, however, the traditional die-casting mold design process has the following disadvantages of excessive dependence upon the mold engineer's personal experience, a too long mold designing cycle and a heavy designing work-load.The filling process of die-casting has a significant impact on quality of die casting. Many defects are due to the unstability in filling process. Whether the design of gating system and overflow tank of die casting mould is reasonable to a large extent determines wheter the filling process is stable or not.This paper is started with a gating system and overflow tank technology program of a vehicle seat belt spin spindle designed based on the author's experience,then the filling process of the technology program is simulated through the introduction of the numerical simulation software Pro/CAST.It turns out that the filling process is stable, but dispersed shrinkage is found at the two ends of the die casting. In order to solve the problem, an overflow tank is added to each of the two ends of the die casting. In a repeated simulation filling process course, the improved one turns out that the filling process is stable, and dispersed shrinkage is transferred to the newly added overflow tanks, which can be removed through later process, reaching the quality requirements of die casting.After finishing the optimisation design of the gating system and overflow tank, Pro/Engineer 2.0 module is used to complete the design of die cavity and core-pulling mechanism with a slide. In the traditional die-casting mold design process, the design of moldbase is completed in 2D design software after the design of die cavity. This method bears the following disadvantages such as labour intensity, indirect viewing and relatively long design cycles. In this paper, EMX.4.1 is introduced, in which moldbase is modified from 3D view, reducing the labour-intensity of design, shortening designing cycle of moldbase and strengthing intuition.Through the introduction of numerical simulation software Pro/CAST to simulate the filling process of vehicle seat belt spin spindle in this paper, the design of gating system and overflow tank is optimised and the design process of the author's moldbase is guided. designing cycle of mold base is shortened by applying Pro / Engineer 2.0 module to complete the design of die cavity and core-pulling mechanism with a slide and EMX.4.1 to complete the design of moldbase of die-casting mold, which fully embodies the promotion of CAD/CAE technology on the design of die-casting mold.