EXTRUSION HEAD FOR MOLDING HOLLOW ARTICLE

摘要

An extrusion head for molding a hollow article comprises a body, a mandrel placed in its cavity with a channel for feeding air into a hollow molded product. The body is made of a nonmagnetic material. From the outside of the body on the area of location of the mandrel an inductance coil is mounted. The mandrel is made of magnetic material with a Curie point corresponding to the temperature of the molding process.