Material cylinder and screw are made with superior alloy steel, dealing with nitration and super-finish.then it will be have the good hardness and corrosion resistance. The high of Extrusion machine is 3 meters, blowing mode is down-run, reeling device uses moment motor to keep the good tension, then reeling product regularly and changing it freely. Usage: It can blow the material of PP and the LDPE、HDPE, the product can pack the food , suit, textile material, daily necessaries, industrial product, etc.