The structure of a film blowing machine is relatively straightforward, but its components work together to produce high-quality plastic films efficiently. In this article, we will take a closer look at the main parts and how the machine operates. A typical film blowing machine consists of several key components, including the extrusion unit, die, bubble cooling system, take-up device, traction system, and winding mechanism. The extruder itself includes a hopper for feeding raw materials, a Motor, and a screw system that helps melt and push the plastic through the machine. Belt-driven systems are commonly used to power the extruder, ensuring smooth and consistent operation.
The screw die is a critical part of the machine, as it plays a significant role in shaping the molten plastic into a tubular film. High-quality screw dies can greatly enhance the output and efficiency of the process. During operation, polyethylene pellets are first fed into the cutting device, which then feeds them into the extruder. As the machine runs, the plastic is gradually melted by heat and pressure inside the extruder. The molten plastic is then formed into a bubble through the die, and as it cools, it is stretched and pulled by the traction system before being wound into a roll by the winding device.
Here are some specifications for two common models:
- **Model**: XY-55 / XY-65
- **Material**: LDPE / LDPE
- **Extrusion Output**: 5–25 kg/h / 10–30 kg/h
- **Blowing Bag Width**: 50–480 mm / 100–580 mm
- **Film Thickness**: 0.04–0.15 mm / 0.04–0.15 mm
- **Membrane Output Diameter**: Φ550 mm / Φ550 mm
- **Screw Diameter**: Φ55 mm / Φ65 mm
- **L/D Ratio**: 28:1 / 28:1
- **Electric Heating Power**: 12 kW / 15 kW
- **Machine Power**: 25 kW / 30 kW
- **Dimensions**: 6000 × 1200 × 4100 mm / 6000 × 1200 × 4100 mm
These machines are widely used in the production of flexible packaging, agricultural films, and other plastic film applications. Their simplicity and reliability make them a popular choice in the industry. Whether you're looking for a compact model or a larger-scale production unit, there's a suitable option available to meet your needs.
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