Induction heating coil unit for manifold in hot runner mold

摘要

The present invention provides an induction heating method for a manifold in a hot runner mold where it is possible to uniformly heat material over the entire length of a runner and in which a coil may be easily attached to and detached from the manifold. In the induction heating method for a manifold of a hot runner mold including a fixed mold and a movable mold, a space is provided along a side surface 10b of the manifold 10 on which clamping force applied by the fixed mold and the movable mold does not act, wherein a coil 17 is wound to the side surface 10b along an axial line of a runner of the manifold within this space such that the manifold 10 is induction-heated from the side surface 10b.