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