Patent ID: 6428306
Filing Date: 2002-08-06
Classification: B29C

Abstract:
A mold for molding a thermoplastic resin comprising:a pair of a male mold and a female mold in which a molten mass of thermoplastic resin is supplied into a molding cavity formed by the male and female molds through a conduit for a resin melt, and after the completion of the supply of the resin, the supplied resin is shaped while shutting off the conduit for a resin melt with a movable pin for opening and closing the conduit for a resin melt, said conduit for a resin melt comprising a through-mouth of a nozzle which is formed so that it is exposed to the molding cavity, said through-mouth having an upstream and downstream side, and a warmed conduit which is connected with the upstream side of the through-mouth, and said movable pin closes the conduit for a resin melt when it is inserted in the whole region of the through-mouth and opens the conduit for a resin melt when it recedes from the through-mouth, a first heater which heats the wall of the conduit for a resin melt at a temperature suitable for the flowing of the thermoplastic resin when it is supplied, and a second heater which heats the through-mouth at a temperature suitable for the flowing of the thermoplastic resin when it is supplied.