Built to Endure PP Strapping Band Production Line Heavy Duty PP Extrusion Workhorse
This industrial backbone is engineered for uninterrupted, high-intensity production. Understanding that downtime means loss, we reject compromise at every critical durability component. The extruder's core—screw and barrel—is crafted from 38CrMoAlA alloy steel with deep nitriding treatment, achieving surface hardness up to HV1000 to withstand years of wear from PP fillers. The gearbox features integrally cast HT250 iron, annealed to relieve internal stress, with internal helical gears hardened and precision-ground for smooth, quiet operation. From the robust welded frame to brand-name bearings and seals, every detail reflects our commitment to reliability, delivering decades of stable service.
- Ultra-Wear-Resistant Extrusion Unit: Nitrided screw and barrel with deep, uniform hardness layer, offering wear life several times that of ordinary carburized treatment. Precision-ground barrel bore with optimized clearance balances plasticizing efficiency and durability.
- High-Rigidity Drive System: Gearbox gears use 20CrMnTi alloy steel with high-frequency hardened and precision-ground tooth surfaces (accuracy grade GB7), ensuring high transmission efficiency, low temperature rise, and long life. Includes built-in forced lubrication system.
- Sturdy Mechanical Structure: Main frame constructed from high-quality profiles and steel plates with reinforced design at key load-bearing points and stress relief treatment to prevent long-term deformation.
- Brand-Name Key Components: Bearings, seals, inverters, and other critical parts selected from renowned domestic and international brands, ensuring operational reliability and maintenance convenience.
| Parameter Category | Parameter Item | Specification / Description |
|---|---|---|
| Extruder Core | Screw/Barrel Material | 38CrMoAlA (Nitrided) |
| Surface Hardness | ≥ HV1000 | |
| Expected Service Life | ≥ 3-5 years (depending on material abrasiveness) | |
| Gearbox | Housing Material | HT250 Cast Iron |
| Gear Material/Process | 20CrMnTi, Hardened & Ground | |
| Noise Level | ≤ 72 dB(A) | |
| Lubrication System | Forced Circulating Oil Lubrication | |
| Structural Design | Main Frame Steel Thickness | Thickened Design at Key Locations |
| Brand Components | Main Drive Inverter | ABB or equivalent brand |
| Main Bearings | Reputable Brands (e.g., HRB/ZWZ/C&U) |
It is crucial, especially for PP materials that may contain fillers like calcium carbonate. Nitriding is a surface chemical heat treatment that forms an extremely hard (above HV1000) and corrosion-resistant nitride layer on the steel surface. This "armor" effectively resists abrasive wear from the plastic melt, particularly fillers. Ordinary carbon steel or untreated alloy steel may suffer severe wear within months when processing abrasive materials, leading to decreased output, uneven plasticization, and increased energy consumption. Our nitriding treatment depth can reach 0.4-0.6mm, ensuring performance is maintained even after long-term wear.
The overall machine design life exceeds 10 years, with core structural components lasting over 15 years. Daily maintenance is key to ensuring longevity:
- Regular Lubrication: Strictly follow the manual for oiling or changing oil in the gearbox and bearings.
- Cleaning & Tightening: Regularly clean dust and oil from equipment surfaces; inspect and tighten critical bolts.
- Electrical Inspection: Periodically check electrical terminals for looseness.
- Screw Care: Use purge compound to clean the screw and barrel before prolonged shutdowns to prevent corrosion.
Our provided maintenance manual will guide you through these tasks in detail.
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