Injection mold

Abstract

A cavity of an injection mold has a ring shape in a plane view, and has a cross-sectional shape having an upper surface forming a design surface of an injection-molded product, both side surfaces continuing from the upper surface, and a bottom surface. When molten resin is injected from a side gate, flows in opposite directions are generated in the cavity and the molten resin meets at a position opposite the side gate in a diameter direction of the cavity, but at this position, the molten resin partly flows into resin reservoirs disposed on both sides. Consequently, since flows horizontal to the upper surface are generated, a luminous material in these flows is also oriented substantially in parallel to the design surface, which can alleviate the disorder of the orientation of the luminous material.

1 . An injection mold in whose cavity molten resin meets, the injection mold comprising
 resin reservoirs which are connected to the cavity on both sides of a position where the molten resin meets, and into which the molten resin partly flows.   
     
     
         2 . The injection mold according to  claim 1 ,
 wherein the cavity has a cross-sectional shape having a surface forming a design surface of an injection-molded product and both side surfaces continuing from the surface, and   wherein one of the resin reservoirs is connected to one of the side surfaces and the other resin reservoir is connected to the other side surface.   
     
     
         3 . The injection mold according to  claim 2 , wherein the resin reservoirs are connected to the side surfaces at positions apart from the surface. 
     
     
         4 . The injection mold according to  claim 1 , wherein the cavity has a cross-sectional shape having a surface forming a design surface of an injection-molded product and a bottom surface continuing from the surface. 
     
     
         5 . The injection mold according to  claim 1 , wherein the cavity has a ring shape in a plane view.