3 layer coex double winder pe plastic film blowing machine

3 layer coex double winder pe plastic film blowing machine

General Film Specification

300-3000mm film lay-flat width

4-100 microns thickness

1-5 layer co extrusion

Raw Material

LDPE, LLDPE, mPE, EVA, Master Batch, Recycled materials

Extrusion Process

Plastic melt is extruded through an annular slit die, to form thin walled tube   Air is intruduced in the centre of the die to blow up the tube like a balloon(IBC)   Air ring blows onto the hot film to cool it(outside and inside the tube)   The tube passes through nip rolls where is flattened   Collapsed tube is taken back down the extrusion tower via more idler rollers   On winder the tube or film is wound into rolls

Elements of Blown Film Machine

Extruder

Screw L/D ratio: 30:1

Die head

Stationary die and Rotary die

Die gap: 0.8-2.0mm

Bubble diameter

BUR(blow up ratio): 1.2-2.8

Bubble cage

Synchronous adjustment and calibration

IBC cooling equipment

Heat exchanges for air cooling, IBC fans controlled via frequenct converters

Ultrasonic sensor for IBC control

Collapsing plate

Hual-off Unit

Nip roller

Idler(Guide) roller

Rewinder

Double rewinding, single-surface, back-to-back type

Double rewinding, double-surface

Automatic cutting

MD(Machine direction)

TD(Transverse direction)

Application

Plastic films   General packaging film Plastic bags film Stretch film Heat-shrink film Pof heat-shrinl film High barrier film Separation film Silage film

 Characteristic of Machine

· Screw and barrel are designed to adopt the special compounding function to melt at high speed and homogeneous, also get greater output.

· Spiral flow channel die is designed to stabilize melt flow. Optional rotating device is chosen and helpful to eliminate gauge band on the web.

· Air/ water rings are alum-alloyed special design for providing excellent and stable cooling. The combination of air and water cooling rings for water output and air blow stably working together, which results in excellent film transparency, film surface is evenly and glossy.

· Take-off unit allows adjustment to the proper height and provides effective film cooling.

· A variety of winders including manual, 2 bobbin type, 4 bobbin type, back to back winder with computerized tension control for high quality film. Computerized speed control system of take-off and winding units will provide precise winding quality, won' t cause tensile or broken of film.