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<p>[QUOTE=&quot;Alegandron, post: 2439279, member: 51347&quot;]Curious:&nbsp; I have been involved in plastics molding, cast iron, cast aluminums, investment casting, and several other manufacturing for 40 years... I noticed in numismatics, everyone calls them sprues (the small protuberance on a coin).</p><p><br /></p><p>We would call the protuberance on the coin a GATE, as this is the area where the metal (or plastic) would enter the mold (of the coin).&nbsp; The SPRUE was the actual runner or long metal piece (the channel where the metal flowed) that lead to the gate into the mold.&nbsp; When the runner (or channel) hardened during cooling, that was called the sprue.</p><p>[ATTACH=full]508012[/ATTACH]</p><p>[ATTACH=full]508013[/ATTACH][/QUOTE]</p><p><br /></p>

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