A nylon core pin for forming throughout holes through a midsole

摘要

end. The technical field to which the invention described in the claims belongs.;The present invention relates to a core pin for forming a midsole of a shoe, and more particularly, to a core pin molded from a nylon resin as a raw material.;I. The technical problem the invention is trying to solve.;Conventional core pins have been commonly used in the shape to meet the purpose by using a metal such as steel, but core pins made of such metals are low thermal conductivity and heat dissipation is poor, so when repeated use is exposed to high temperature heat storage In this case, the periphery of the hole contacting the core pin from the filling of the raw material resin during the molding of the polyurethane foaming resin injected into the mold is exposed to high temperature for a certain time and hardens. The crushing occurs, the midsole is molded has a problem that the coarse cell (coars cell) is generated and hardened to the through-hole formed by the core pin to reduce the fit and impact absorption.;All. The gist of the solution of the invention.;By providing a core pin molded using a nylon resin having excellent heat dissipation, it is possible to prevent the generation of defective products due to the heat storage of the core pin.;la. Important uses of the devise;Mid sole