Our melt pipe adopts bar drilling, grinding, polishing a molding production.The utility model can ensure the concentricity of the inside and outside, and also can ensure the consistency of the surface smoothness of the inner wall.It is very conducive to solve the problem of micro beating of the melt in the narrow pipeline.The maximum single branch length of the melt pipe is 4 m and the surface finish is Ra0.02.Heating forms include electric heating (ceramic heater, cast aluminum heater, cast copper heater etc.), circulating conducting oil heating, self-circulation heat conducting oil heating, closed conducting oil heating, infrared heating, electromagnetic heating and other heating form.Melt pipe angle can be made according to the layout of the site, bent into any angle.