In this study, a pin screen mold was proposed for fabricating Al foam with complex shapes. A pin screen mold can easily form a complex surface simply by moving the pins upward and downward. First, the effect of the interval between the pins and the downward force against the heads of the pins on the surface morphology of the obtained Al foam was investigated. Little protrusion of the Al foam through the gaps between the pins was observed for the minimum interval between the pins even though a downward force was applied. The extent of protrusion increased as the interval between the pins increased, and this tendency became more apparent as the downward force increased. There is a limit to the interval between the pins for which the shape of the Al foam is retained without collapse. The porosities of the obtained Al foam were between 75 and 84% and the pores were homogeneously distributed in the obtained Al foam. Moreover, the star-shaped Al foam with homogeneously distributed pores was fabricated by preparing a pin screen mold with a star-shaped cavity. In addition, the Al foam with a star-shaped outline and homogeneously distributed pores was fabricated by preparing a star-shaped gap in the pin screen mold.

中文翻译：

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用针筛模具制造复杂形状的泡沫铝及其销钉排列对其表面形态的影响

在这项研究中，提出了一种用于制造具有复杂形状的泡沫铝的针筛模具。仅通过向上和向下移动销钉，销钉筛网模具就可以轻松地形成复杂的表面。首先，研究销之间的间隔和对销的头部的向下力对所获得的Al泡沫的表面形态的影响。即使在施加向下的力的情况下，对于销之间的最小间隔，也观察不到Al泡沫穿过销之间的间隙的突出。突起的程度随着销之间的间隔的增加而增加，并且随着向下力的增加，这种趋势变得更加明显。销钉之间的间隔受到限制，铝泡沫的形状不会塌陷，销钉之间的间隔是有限的。所获得的Al泡沫的孔隙率在75％至84％之间，并且孔均匀地分布在所获得的Al泡沫中。此外，通过制备具有星形腔的针筛模具来制造具有均匀分布的孔的星形Al泡沫。另外，通过在针筛模具中制备星形间隙来制造具有星形轮廓和均匀分布的孔的Al泡沫。