Extension Box with 100mm Insulation & Pressure Unit – PP Line
The extension box and pressure extension unit of this production line are the core components that impart high strength to PP strapping. The extension box has a total length of 6.5 meters (4m + 2.5m), with φ200mm extension rollers at HRC60 hardness, heating power of 41.6KW, and a 6KW mold temperature controller for precise roller surface temperature control.
The box features 100mm thick insulation, effectively reducing heat loss and ensuring uniform internal temperature. The pressure extension unit features a φ156mm roller driven by a 7.5KW motor, providing auxiliary stretching force for more complete molecular orientation. The unit has an adjustable temperature range of 50-250°C and a continuously adjustable draw ratio of 1.5-12 times.
The thick insulation not only saves energy but also improves the workshop environment, serving as an important guarantee for efficient and stable operation.
| Parameter | Extension Box | Pressure Extension Unit |
|---|---|---|
| Length | 4m + 2.5m | -- |
| Roller diameter | φ200 mm | φ156 mm |
| Roller surface hardness | HRC 60 | -- |
| Heating power | 41.6 KW | -- |
| Mold temp controller power | 6 KW | -- |
| Insulation thickness | 100 mm | -- |
| Motor power | -- | 7.5 KW |
| Temperature range | 50 - 250°C | -- |
| Draw ratio | 1.5 - 12 : 1 | -- |
- Thick insulation: 100mm rock wool, significantly reduces heat loss
- Energy saving: Reduces heating energy consumption, lowers operating costs
- Temperature stability: Thick insulation isolates external interference, more precise control
- Mold temp controller: 6KW ensures uniform roller surface temperature
- Pressure-assisted stretching: Pressure unit provides additional stretching force
- High hardness rollers: HRC60, wear-resistant and durable
- Long heating zone: 6.5m length ensures sufficient preheating
- Wide temperature range: 50-250°C for PP and modified materials
- Safety design: Low outer wall temperature prevents burns
- Easy maintenance: Insulation covered with stainless steel sheet, easy to clean
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