Shoe Maker Interview Question:

Tell me what is parting line or outsole parting-plane?

Submitted by: Muhammad

The line in an outsole mold is made by the closing edges of the tooling. The tooling is split at the parting line. A mold may have one or 2 parting planes. Extra rubber may spread out of the parting line, this will be need to be trimmed off. A narrow tight parting line or parting plane is a sign of quality tooling.
Submitted by: Muhammad