薄齿形散热片浇铸模设计方案

Design of Pouring Mold for the Tooth Shape Thin Fin

由于薄齿形散热片的形状和结构复杂,外观要求较严。原为压铸成型,现要求改为重力浇铸成型,可是压铸成型和浇铸成型之间的成型工艺条件相差很大。为了确保浇铸能达到压铸的效果,通过对铸件结构进行工艺性分析,判定出浇铸的难点,制定出了浇铸模设计方案。充分考虑到对合金熔液在充模流动、温降、排气过程中的影响因素,采用了可以进行补缩作用冒口,在模腔周围增设了若干数量的电热棒,并合理设计了浇注系统、排气系统和浇口杯以及浇铸件在模腔的位置等措施之后,克服了重力浇铸所产生的不足,实现了浇铸件的成型。经试模可以判定,散热片浇铸完全可以实现浇铸件的顺利成型,且铸件尺寸和外观的质量均能达到图纸要求。

Due to the shape of the tooth shape thin fin and complex structure, a strict appearance. Originally die-casting die, hereby request instead of gravity pouring molding,die-casting molding and molding process conditions vary widely between pouring molding. In order to ensure that can achieve the effect of die casting, casting on the casting structural manufacturability analysis, identify the difficulties of the casting, develop the casting mold design. Fully considering the alloy melt fluid flow in mold filling, influence factors, in the process of temperature drop and exhaust adopted can make the feeding riser, added some around the cavity number of electric heating rods, and the reasonable design of gating system, exhaust system and pouring basin and casting parts after the measure such as the location of the cavity.Thus customer service, produced by gravity casting casting parts forming is realized. After test can determine, fin casting can achieve smooth casting parts forming, and the quality of the product size and appearance can meet the drawing requirements.