semi automatic stretch blow machine Characteristics: The cylinder and the screw are made of high quality alloy steel with optimum hardness and strong corrosion resistance after precise processing and nitrogen treatment ,The auxiliary machine has a platform which makes operation easy ,The rewinding unit adopts torque motor to keep proper tension and make rewinding even and roll changing easy.It is used to blow the various PE thermal shrink film ,which is applied extensively to food ,medicine,beer bottel ,.material bottle,box,case.cloth reel.floor.glass ,tray,pottery and tissue,etc. Main Technical Parameter: