| CPC B29C 45/345 (2013.01) [B29C 33/3842 (2013.01); B33Y 80/00 (2014.12)] | 22 Claims |

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1. A system for venting gases in a mold insert constructed in a plurality of layers, said system comprising:
a forming layer of porous steel;
a middle layer of solid steel;
a base layer of solid steel;
a plurality of vent channels within said middle layer and said base layer; and
a plurality of cooling waterlines within said middle layer.
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