Film extrusion line – blown mode

General description:

The blown film extrusion line is composed of four single-screw extruders (A, B, C, and D) connected to a spiral die. Extruders A to C are equipped with valves that allow for an asymmetric configuration, enabling the production of up to four layers.

Characteristics:

• Blowing film mode:
  

  Characteristic	Metric Value	Imperial Value
  Temperature range	Ambient to 300°C	Ambient to 572°F
  Number of single screws	4	4
  Number of twin screws	1	1
  Total number layers	7	7
  Layers configuration	A-B-C-D-C-B-A
  Die diameter	50mm	2in
  Die gap	1.5mm	59mil
  Maximum lay-flat width	30cm	11.5 in
  Maximum blown up ratio	3.8	3.8
  External Cooling	Air	Air

   

  • Single screw extruders

  Characteristic	Metric Value	Imperial Value
  Approx. Max Output (LDPE)	12Kg/h	25lbs/h
  L/D	30	30
  Screws diameter	20mm	20mm
  Flight count	Single
  Mixing elements	Maddock+Pin

   

  • Twin screw extruder

  Characteristic	Metric Value	Imperial Value
  Diameter	16mm	0.63
  L/D	40	40
  Screw speed (RPM)	0 to 800
  Motor Power	2.2kW	3hp
  Max. extrusion output pressure	100 bar	1450 psi
  Max. dynamic thrust bearing load	3.2 kN	719 lbs-force
  Max. torque at 600RPM	2×18 Nm	2×13.3 ft-lbs
  Specific Torque	9.22Nm/	111 ft-lbs/
  Outer and inner screw diameter (D/d)	1.73
  Max barrel temp. (standard)	400°C	752°F
  Approx. max. output (LDPE)	5 kg/h	11 lbs/h
  Resin remaining on screw (LDPE)	15g	0.53 onces