Introduction to PPR Socket Welding Mold A socket welding mold is a core component of a PPR welding machine, directly responsible for heating, shaping, and joining PPR pipes and fittings through the socket fusion process.Unlike the welding machine body, the mold is the part that comes into direct contact with the pipe. Its dimensional accuracy, thickness, surface coating, and thermal stability determine the final welding quality. For professional applications, PPR socket welding molds typically cover a size range from 20mm
