The Head And Mouth Die Of The Film Blowing Machine

The main equipment of the film blowing machine is a single screw extruder. Because it is flat extruded and blown, the mouth die of the film blowing machine is a turning right Angle, and the role is to extrude the tubular billet upward. Due to the problem of material flow direction in the right-angle head, it is necessary to consider ways not to make the material flow speed near the extruder side greater than the other side in the mold design, so that the film thickness fluctuation is reduced. In order to make the thickness fluctuation of the film evenly distributed on the film roll, the right-angle rotating head is often used. The width of the gap and the length of the straight part of the die have a certain relationship with the thickness of the film, such as the width of the die gap used for blowing 0.03 ~ 0.05mm thick film is 0.4 ~ 0.8mm, and the length of the straight part is 7 ~ 14mm