High-Efficiency Plastic Granulator from China Suppliers - FUHONG Factory CE-Certified Granulation Solution
🖼️ Injection Unit — Product Gallery
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💡 The Injection Unit is the core component responsible for melting and injecting plastic material into the mold — engineered for precision, consistency, and high-volume production performance.
⚙️ Key Features
- 🔩 High-Precision Screw Design: Ensures uniform melting and consistent shot weight for every cycle.
- 🌡️ Advanced Temperature Control: Multiple heating zones provide stable and accurate melt temperature management.
- 💪 High Injection Pressure: Capable of filling complex and thin-wall mold cavities with ease.
- 🔄 Smooth Back Pressure Control: Achieves excellent material homogeneity and part quality.
- 🛡️ Wear-Resistant Barrel & Screw: Built from hardened alloy steel for extended service life and reduced maintenance.
- ⚡ Rapid Response Hydraulics: Fast injection speed with precise velocity and position control throughout the stroke.
📋 Technical Specifications
| Parameter | Specification |
|---|---|
| Screw Diameter | 25 mm – 120 mm |
| Injection Pressure | Up to 2,300 bar |
| Injection Speed | Up to 500 mm/s |
| Heating Zones | 3 – 6 Zones |
| Screw L/D Ratio | 20:1 / 22:1 / 24:1 |
| Material Compatibility | PP, PE, ABS, PA, PC, POM, PVC, etc. |
❓ Frequently Asked Questions
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What is the function of the injection unit in an injection molding machine?
The injection unit is responsible for melting plastic pellets or granules and injecting the molten material into the mold cavity under high pressure. It controls shot volume, injection speed, and pressure to ensure consistent part quality.
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What materials can the injection unit process?
The injection unit is compatible with a wide range of thermoplastic materials including PP, PE, ABS, PA (Nylon), PC, POM, PVC, and many engineering-grade polymers. Special screw and barrel configurations are available for abrasive or corrosive materials.
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How does screw design affect injection unit performance?
The screw geometry — including flight depth, compression ratio, and L/D ratio — directly impacts plasticizing efficiency, melt homogeneity, and shot consistency. A properly designed screw minimizes degradation and ensures uniform melt temperature throughout the barrel.
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How often should the barrel and screw be maintained or replaced?
Maintenance intervals depend on the materials processed and production volume. General-purpose screws and barrels typically last several thousand operating hours. Processing abrasive-filled materials (e.g., glass fiber) accelerates wear, requiring more frequent inspection and replacement of wear-resistant components.
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Can the injection unit be customized for special applications?
Yes. Injection units can be configured with different screw profiles, barrier screws, mixing elements, and specialized barrel coatings to accommodate specific materials, color mixing requirements, or high-performance engineering applications.
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What factors should I consider when selecting an injection unit?
Key selection factors include shot weight capacity, injection pressure and speed requirements, screw diameter relative to part size, material type and processing temperature range, and the required level of precision for your specific application. Consulting with a technical specialist ensures the optimal unit configuration for your production needs.