Blown Film Machine - Email: machinepacking@yahoo.com,whatsapp/line/viber:+8613600644862. The most common way to produce poly bags or plastic bags is by blown film machine, which make the polyethylene resin into roll of film.
The polyethylene arrives at the plastic bag manufacturing facility in pellet form, referred to as resin. The machine operator pours the polyethylene resin into the hopper which feeds the resin into the extruder. And heating elements and the turning of the extruder screw melts the resin into molten form and forces it through the extruder.
As the molten poly emerges from the die, the machine operator grabs it wearing protective gloves, pinches the molten poly together and ties a rope to the top of the molten poly. The rope leads upward to a pulley system. Then pulls the other end of the rope to move the molten poly upwards. At the same time, the air ring blows cool air upwards, which solidifies the molten poly. As the tubular shape moves up, the machine operator inserts an air gun through the poly film to blow in additional air.
This step is repeated until the diameter of the tubular poly film reaches the required bag size. As the film reaches the top of the cooling tower, the guides gradually flatten it into a layflat form. If the plastic bag will have gussets, special frames (called “gusset boards”) indent the sides of the tube before it is flattened. And finally come out with roll of film.
This video shows Double-layer blown film Machine, One die head assembled with two extruders (with two screws), used in making firm bags for express delivery.There are also many other kinds of blown film extrusions according to the customer different requirements for the film width and film usage.
Email:machinepacking@yahoo.com,whatsapp/line/viber:+8613600644862.
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Blown Film Machine
