Knit lines in molded parts Liquid plastic (melt) flowing around obstacles in a mold tool, such as inserts, ribs, cores, etc., produces what are called knit and meld lines.

CHICAGO (Aug. 21, 5:55 p.m. EDT) — Chem-Pak Inc. showcased its patented product that resolves knit and flow lines created during the injection molding of matte finished parts.Knit and flow lines ...