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从理论上分析了多浇口成型分子的流动取向,并显示多浇口成型过程中熔接痕的形成位置。以汽车车门内饰板为例,针对传统的3点进浇成型容易出现的缺陷,利用Moldflow软件模拟其针阀控制顺序充模过程,对顺序注塑工艺和浇口开关时间进行初步优化,在熔体温度200℃,模具温度40℃,冷却时间20s的工艺条件下,分别在第1个浇口开启1.2s和1.6s后开启第2个和第3个浇口,通过对比锁模力、填充时间、熔接痕、变形等成型结果,验证了顺序注塑工艺能显著改善塑料件缺陷。用于实际生产中,可以获得高质量的塑件。
The flow orientation of multi-gate molding molecules is theoretically analyzed, and the formation of weld marks in the multi-gate molding process is also shown. Taking the automobile door trim as an example, aiming at the defects that the traditional 3-point pouring molding is prone to occur, Moldflow software was used to simulate the filling process of the needle valve control sequence. The sequential injection molding process and the gate switch time were preliminarily optimized. Body temperature 200 ℃, mold temperature 40 ℃, cooling time 20s under the conditions of technology, respectively, after the first gate opened 1.2s and 1.6s after the opening of the second and third gate, by comparing the clamping force, filling Time, weld marks, deformation and other molding results, verify the sequential injection molding process can significantly improve the plastic parts defects. Used in actual production, you can get high-quality plastic parts.