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研究吹气法制备泡沫铝工艺中静态吹气装置的气室体积和吹气口数量对泡沫铝孔径的影响。归纳关于气室体积对产生气泡大小的影响,以及在中小流量下气泡大小的计算公式。结合吹气法制备泡沫铝工艺,使用可以调节气室体积的供气系统,发现减小吹气装置的气室体积可以有效减小泡沫铝孔径。根据试验数据提出适合吹气发泡工艺的修正系数,使其能够计算吹气法泡沫铝的孔径。研究发现对于相同气室体积的吹气装置,增加吹气孔数时泡沫铝的孔径减小。据此提出“有效气室体积”的概念,认为吹气头的表观气室体积除以有效吹气孔数才是发挥作用的有效气室体积。利用“有效气室体积”和孔径计算修正系数能够较好地预测泡沫铝的孔径。
The influence of the volume of the gas chamber and the number of blowing ports on the aperture of the foamed aluminum was studied. Summarize the impact of the volume of the gas chamber on the bubble size, and the formula of the bubble size at medium and small flow rates. In combination with the air-blowing method for preparing the aluminum foam, the air supply system can be used to adjust the air chamber volume. It is found that reducing the air chamber volume of the air blowing device can effectively reduce the aluminum foam aperture. Based on the experimental data, a correction coefficient suitable for blowing air foaming process is proposed so that it can calculate the pore size of air blowing foamed aluminum. It was found that the pore size of the foamed aluminum decreased when the number of blowing holes was increased for the same gas chamber volume inflator. Accordingly, the concept of “effective gas chamber volume” is proposed, and it is considered that the effective gas volume of the effective gas chamber that plays a role is divided by the apparent gas chamber volume of the gas blowing head divided by the number of effective gas blowing holes. The pore size of aluminum foam can be predicted well by using the effective chamber volume and the correction factor of pore size calculation.