Runner structure of casting machine for polymer film production

The utility model belongs to the technical field of casting machines, and particularly relates to a runner structure of a casting machine for polymer film production, which comprises two die bodies which are detachably connected together, and the sides, close to each other, of the two die bodies are respectively provided with a plastic cavity for accommodating molten plastic. A glue inlet and a glue outlet channel are formed in the inner walls of the tops and the bottoms of the two glue cavities respectively, the same obliquely-arranged glue flowing channel is arranged in the two glue cavities, the glue inlet is located in the higher side of the glue flowing channel, and a glue outlet is formed in the inner wall of the bottom of the glue flowing channel and located over the two glue outlet channels. According to the utility model, molten plastic can flow from a high position to a low position under the action of gravity, so that the molten plastic can be fully distributed at the whole glue outlet, and the com