BJ Beauchamp writes:
> Depends on what type of model it is. In the Gunpla community,
> we all know the sheets by their proper name (runners).
I'm not sure what you mean by the "proper name." Yes, ランナー is the
Japanese name.
See this diagram here:
http://imoldmaking.com/mold-making-2/mold-design/runner-and-gate/injection-m
old-sprue-and-runner/
Technically, the "sprue" is the portion that leads from the outside of the
mold in, the "runners" are elements that spread the plastic in parallel to
the parts and the "gates" lead from the runners to the parts.
So neither "sprue" nor "runner" is technically the correct name for all of
the excess plastic surrounding the parts in a model.
But when I was making plastic models long ago, we (when speaking in English)
called all of the excess plastic "sprue" or "sprues." For whatever reason,
ランナー became the accepted Japanese term, despite similarly being not
quite technically accurate.
I think "sprue" is just fine, even for younger modelers.
Regards,
Alan Siegrist
Carmel, CA, USA