Distribution runner structure, extrusion die head and plastic extruder

Abstract

The utility model discloses a distribution runner structure, an extrusion die head and a plastic extruder, and the distribution runner structure comprises a feeding channel, at least two fluid distribution paths and an accumulation runner which are sequentially arranged along the flowing direction of plastic melt, one end parts of the at least two fluid distribution paths are intersected and communicated with the feeding channel, the other end parts of the at least two fluid distribution paths are respectively communicated with the material accumulation flow channel, and the distribution flow channel structure is configured as follows: plastic melt is shunted by the at least two fluid distribution paths and then is converged and filled in the material accumulation flow channel. The extrusion die head comprises a feeding port, a distribution runner structure and an extrusion port which are communicated in sequence. The plastic extruder comprises an extrusion die head. The distribution runner structure is simple in structure and optimizes flow velocity distribution of the plastic melt, so that the plastic melt enters the distribution runner structure through the feed port of the extrusion die head, can be shunted by at least two fluid distribution paths and then converges and fills the material accumulation runner, the flow velocity distribution of the plastic melt is more uniform and consistent, and the flow velocity distribution efficiency of the plastic melt is improved. And a molded and extruded plastic sheet product is more uniform in thickness.