Two Layer Blown Film Machine

Two Layer Blown Film Machine
Two Layer Blown Film Machine
Two Layer Blown Film Machine
Two Layer Blown Film Machine
Two Layer Blown Film Machine
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This two-layer blown film machine is a versatile tool for producing plastic films made of low-density polyethylene (LDPE), high-density polyethylene (HDPE), and linear low density polyethylene (LLDPE). It is widely used for packaging liquids, printing materials, exporting products and industrial product packaging.

Technical Parameters
Model
SJ-55*2/RG1200
SJ-65*2/RG1500
SJ-65*2/RG2000
Screw diameter (mm) 55/55 55/65 70/65
Screw L/D ratio 30:1 30:1 30:1
Screw speed (r/min) 110 110 110
Capacity (kg/h) 110 140 160
Power of main motor (kW) 18.5/18.5 18.5/30 30/37
Diameter of die (mm) 300 450 550
Thickness of film (mm) 0.02-0.15 0.02-0.15 0.02-0.15
Max. folding width of film (mm) 1200 1500 2000
Total power (kW) 65 85 95
Weight (kg) 4500 6000 6500
Dimensions (L*W*H, m) 4.6×3.5×6 5.2×4×7.5 5.5×4.5×10
Features
  • Double-layer co-extrusion complex films can significantly extend the shelf-life of products which are used in liquid packaging.
  • Both barrels and screws of two extruders are constructed from high-grade alloy steel. The manufacturing process includes nitrating and precision finishing for improved hardness and resistance to corrosion.
  • The double-layer co-extrusion rotary die of the die-head is designed to produce the greatest accuracy in thickness of the film.
  • Equipped with a flat work table and a bubble cage, this accessorial equipment allows for easy operation.
  • The winding unit consists of two rewinders and a double cutter. Employing a torque motor as its drive, the unit is capable of maintaining optimum tension and can smoothly and easily rewind a full roll.
Main Components
  • Screw (Taiwan deign) 1. Material: 38 CrMoALA
    2. Material elemental analysis:
    C: 0.35~0.42 Si: 0.20~0.45 Mn: 0.30~0.60 S: ≤0.035 P: ≤0.035
    Cr:1.35~1.65 Al: 0.70~1.10  Ni: ≤0.030  Cu: ≤0.030  Mo:0.15~0.25
    3. Hardness of tempering: HB260-290
    4. Depth of nitriding treatment: 0.4-0.7 mm
    5. Hardness of surface: HV900-1050
    6. Roughness of surface: 0.32 Ra
    7. Linearity of screw: 0.015 mm/m
    8. Bimetal screw: designed with a layer of tungsten carbide applied to the thread
    9. Hardness of bimetal layer: HRC 58-62
    10. Depth of bimetal layer: 2-3 mm
    11. Bimetal layer elements: Fe, Ni, B, C, Cu, etc.
  • Main Motor (Siemens) 1. Speed: 1400 rpm
    2. Motor power: 380V, 3-Phase, can be adjusted as needed
    3. Service life: more than 10 years.
  • Gearbox 1. Functions: reduces speed of transmission
    2. Speed rate: 10:1
    3. High strength hard gearbox boasting service life
    4. Transferring requires lubrication oil
    5. Low noise and longer service life
  • Heater (ceramic heater) 1. Ceramic heater heats up faster than stainless-steel alternatives
    2. Its lifespan is no less than 5 years
    3. t can better retain heat, resulting in lower power consumption
    4. Made from high-quality ceramic and heating wire
  • Die Head (Taiwan design) 1. Made from #45 steel, providing robust performance
    2. Surface treatment is employed to increase the transparency of films
    3. The size of die heads is larger than normal, resulting in increased efficiency and productivity
  • Fast Screen Changer 1. Ensure that workers are employed efficiently
    2. Minimize the risk of material leak
    3. Easy to change the filters, saving time and human labor
  • Double Vent Air Ring 1. Using two lips instead of one can cool the film more quickly, thereby increasing the machine's output
    2. LG inverter, Omron temperature controller box
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