Coiling is a primary forming technique, meaning that it is used to produce the overall shape of a vessel that is then refined by other techniques. Coiling involves the rolling out of clay into a long thin sausage-like form that is wound round like a spring. An automatic coiler is an industrial machine installed at the end of the plastic pipe extrusion cycle (PE, PVC, ALUPEX, PEX, PA, PP) and it automatically performs all operations necessary to form a coil: it couples the pipes, winds it into orderly coils, reaches the set length, and lastly, cuts, binds