如何避免压铸产品（压铸件）上的缩孔问题？

压铸件（压铸产品）上的缺陷： 7.缩孔

其它叫法：缩眼、缩空

压铸件（压铸产品）缩孔问题描述：

压铸件在冷凝过程中，由于内部补偿不足所造成形状不规则，表面粗糙的空洞

压铸件（压铸产品）缩孔问题产生原因

1.合金浇注温度过高

2.产品结构壁厚不均，产生热节。

3.比压太低

4.溢流容量不足，溢口太薄

5.压室太少，余料（料饼太薄），最终在保压阶段补缩起不到作用。

6.内浇口太小。

7.模具温度局部偏高。

压铸件（压铸产品）缩孔问题解决办法

1.按材料规范使用合理的合金熔炼温度，合金液过热时间过长，降低浇注温度

2.改善产品结构，使壁厚均匀,不同壁厚之间缓慢过渡。

3.适当增加注射压力。

4.加大溢流槽容量及溢料口厚度。

5.增加压室合金液体体量。

6.适当改善浇注系统，以很好地传递压力减少在传递过程中损失

How to eliminate shrink hole in die casting parts?

Defects in die castings: 7. shrink hole

Other name: retraction

Features: in the process of condensation, due to inadequate internal compensation caused by irregular shape, rough surface of the hole.

Causes

1. alloy pouring temperature is too high.

2. the wall thickness of casting structure is uneven, resulting in hot knot.

3. the pressure is too low.

4. overflow tank capacity is not enough, overflow is too thin.

5. the pressure chamber is too small, the remaining material (material cake) is too thin, and finally the tonic can not play a role.

6. the gate is smaller.

7. the local temperature of the mold is on the high side.

elimination measures

1. comply with alloy smelting standard, alloy liquid overheating time is too long, reduce pouring temperature.

2. improve the casting structure, eliminate metal accumulation parts, uniform wall thickness, slow transition.

3. appropriately increase the specific pressure.

4. increase the overflow tank capacity, thickening overflow.

5. increase the pressure chamber fullness, Quantitative pouring.

6. appropriately improve the gating system to transfer the pressure well.