Patent ID: 7300274
Filing Date: 2007-11-27
Classification: B29C

Abstract:
1. A change-over device for changing over between a heating medium and a resin material at a time of a secondary forming of a plurality of primary moldings formed in a primary forming, wherein: a joint portion is formed on each of the plurality of primary moldings, a pipe-shaped passage is formed on a joining face of each of the joint portions, a secondary molding is formed by injecting the resin material into an injection passage formed by the pipe-shaped passages when the plurality of primary moldings are set in a mold for the secondary forming and respective pipe-shaped passages are butted to each other, and the change-over device can change over between an inflow of the heating medium and an injection of the resin material a time of forming the secondary molding, the change-over device comprising: a runner block arranged at a position close to an injection port for the resin material for the secondary forming; and a slide core relatively moved with respect to the runner block, wherein a guide passage connected to the injection passage is formed in the runner block, a heating medium passage and resin material passage are arranged in parallel with each other in the slide core, and the slide core moves the heating medium passage and the resin material passage to a position at which either the heating medium passage or the resin material passage can be selectively opposed to the guide passage.