这个型体脚板是射出不喷漆的，脚板模具就是砂面的 Help with Translation
More context would clarify this, but they are probably talking about about die casting, 压铸，模铸  

这个型体脚板是射出不喷漆的，
This type of foot plate is not spray painted,
脚板模具就是砂面的
(because) the base (of the) mold is a sand surface.