Patent ID: 6689303
Filing Date: 2004-02-10
Classification: B29C

Abstract:
Art injection molding method comprising:storing a molding material in a vessel; filling a mold made up of a plurality of stacked members with the molding material injected from the vessel; providing a thrust to a pusher to pressurize one of the pusher and the mold through the molding material in the vessel; and closing the mold by using a thrust from the pusher, wherein P is an injection pressure exerted on the molding material, Pa is a seal pressure exerted on a seal portion between the stacked members, Fn is the pressing force acting on an upper mold of a bottom plate, Fm is thrust obtained from a projection area of the upper mold and the injection pressure P, and Sa is the area of the seal portion, wherein Pa=(Fnâˆ’Fm)/Sa, and Pa/P>C hold with no leakage, wherein said C is equal to 0.32 and said molding material is perflouroalkoxy.