汽车后视镜壳的随形冷却水道注塑模具设计

Design of Injection Mold for Automobile Rear-View Mirror Shell with Conformal Cooling Channel

以汽车后视镜壳为实例,采用传统CNC和金属3D打印的复合技术,制作出含传统冷却水道和随形冷却水道镶嵌的注塑模具。将传统冷却方案与随形冷却方案的模流分析结果进行对比,并完成了汽车后视镜产品的生产。实践证明,含随形冷却水道方案的产品注塑冷却时间显著缩短,冷却效果显著改善.传统冷却水道方案的型腔表面平均温度为130t,而随形冷却水道方案飭型腔表面平均温度约为100℃,与传统冷却水道方案相比,随形冷却水道方案的型腔表面平均温度降低了近30t;传统冷却水道方案的冷却叶间为36s,而随形冷却水道方案的冷却时间为13.3s,与传统冷却水道方案相比,随形冷却水道方案的冷却时间减少了近2/3;传统冷却水道方案餉平均翘曲变形量达到0.4869mm,而随形冷却水道方案的平均翘曲变形量达到0.2566mm,与传统冷却水道方案相比,随形冷却水道方案飽平均翘曲变形量明显减少,减少了约1/2。

The automobile rear-view mirror case was taken as an example, and the compound technology of traditional CNC and metal 3D printing were used to produce an injection mold with a traditional cooling channel and a set of conformal cooling channel. Compared the Moldflow analysis results of traditional cooling scheme with the results of conformal cooling scheme and produced the automotive rear-view mirror, the cooling time of the product with conformal cooling channel was significantly shortened and the cooling effect was significantly improved. The average surface temperature for the cavity of traditional cooling channel scheme was 130 ℃, while that of conformal cooling channel scheme was about 100℃. Compared with the traditional cooling channel scheme, the average surface temperature for the cavity of the conformal cooling channel scheme was reduced nearly 30℃. The cooling time of the traditional cooling channel scheme was 36 s, while the cooling time of the conformal cooling channel scheme was 13.3 s. Compared with the traditional cooling channel scheme, the cooling time of the conformal cooling channel scheme was reduced by nearly 2/3. The average warpage deformation of the traditional cooling channel scheme reached 0.486 9 mm , and the average warpage deformation of the conformal cooling channel scheme reached 0. 256 6 mm. Compared with the traditional cooling channel scheme, the average warpage deformation of the conformal cooling channel scheme was reduced by nearly half.