porous mold

porous mold

[′pȯr·əs ′mōld]
(engineering)
A plastic-forming mold made from bonded or fused aggregates (such as powdered metal or coarse pellets) so that the resulting mass contains numerous open interstices through which air or liquids can pass.
References in periodicals archive ?
Cost reductions and improvements in productivity and product quality are benefits that can be achieved through use of the porous mold steel.
Segen, vacuum tends to be effective with porous mold plates up to 4 in.
Processors also benefit from the unusual self-cooling effect of porous molds.