Hot Air Blower for Plastic Industry — Manufacturer & Supplier
Vayuvents Pvt. Ltd. manufactures and supplies industrial hot air blowers for the plastic and PVC processing industry — covering granule and pellet drying before moulding, PVC extrusion line hot air supply, thermoforming oven heating, shrink tunnel hot air, and pipe and profile extrusion preheating.
Moisture in plastic granules is a major cause of defects in injection moulded and extruded plastic products — splay, bubbles, surface blistering, and reduced mechanical properties all result from insufficient granule drying before processing. Hygroscopic plastics including nylon (PA), PET, ABS, polycarbonate, and acetal must be dried to specific moisture levels before moulding.
Hot air blowers in plastic processing are used for both direct granule drying in hopper dryers and dehumidified air dryers, and for heating applications in thermoforming ovens, shrink tunnels, weld preheating, and plastic welding support. Each application has specific temperature and airflow requirements that Vayuvents matches to the production process.
We have supplied to injection moulding companies, PVC extrusion plants, and plastics manufacturers in Daman, Silvassa, Rajkot, and Ahmedabad — understanding the specific moisture and temperature requirements of different plastic materials.
How It Works in This Application
Hygroscopic Moisture Absorption
Hygroscopic plastic granules (PA, PET, ABS, PC) absorb atmospheric moisture during storage and conveying, reaching moisture levels that cause processing defects if not removed before moulding.
Hot Air Drying
The hot air blower supplies heated air (typically 60 to 120 degrees Celsius) through a hopper dryer or desiccant dryer unit, flowing through the granule bed to absorb and carry away moisture.
Moisture Removal
The moisture-laden exhaust air from the dryer is either vented to atmosphere (hot air dryer) or passed through a desiccant rotor for dehumidification and recirculation (dehumidifying dryer).
Pre-Conditioned Granule Processing
Dried granules at the correct moisture level are fed to the injection moulding machine or extruder, producing parts free from moisture-related defects with full mechanical properties.
Recommended Variants
Hopper Dryer Hot Air Blower
Direct hot air supply to injection moulding hopper dryers — simplest and most common plastic granule drying configuration.
Most RecommendedDehumidified Air Blower
Supplies dehumidified heated air to closed-loop desiccant dryer systems for hygroscopic plastics like PA, PET, and PC.
Thermoforming Oven Blower
High-temperature forced convection hot air supply to thermoforming ovens for plastic sheet preheating.
Shrink Tunnel Blower
Precisely controlled hot air supply to shrink tunnels for PE, PP, and PVC shrink film application over products.
Technical Specifications
| Parameter | Specification |
|---|---|
| Airflow Capacity | 500 to 20,000 m3/hr |
| Outlet Temperature | 60 to 250 degrees Celsius |
| Static Pressure | Up to 400 mmWG |
| Motor Power | 0.37 to 22 kW |
| Impeller Material | MS / SS304 |
| Casing Material | MS / SS304 / Galvanised |
| Standards | IS 4894, IS 6966 |
Key Features
- Precise temperature control via built-in thermostat or external temperature controller for consistent granule drying
- Compact design suitable for integration with hopper dryers and desiccant dryer units at moulding machines
- High-temperature construction rated for continuous operation at drying temperatures up to 250 degrees Celsius
- Low-noise design suitable for injection moulding workshops with operators in close proximity
- Variable speed drive compatible for adjusting airflow to match granule throughput and dryer capacity
- Filter housing option for inlet air filtration to prevent dust and contamination entry into dryer airstream
- Stainless steel option for food-grade plastic processing (packaging and medical device applications)
- Works performance test certificate with measured airflow and temperature data
Industries That Use This Application
Injection Moulding
Granule drying for PA, PET, ABS, PC, acetal, and other hygroscopic plastics in injection moulding plants
Extrusion Plants
PVC pipe, profile, sheet, and cable extrusion line hot air preheating and process heating
Blow Moulding
PET preform reheating and PET bottle blow moulding preconditioning air supply
Thermoforming
Sheet preheating in continuous thermoforming machines for food packaging trays
Rotational Moulding
Hot air oven circulation in rotational moulding ovens for plastic tanks and containers
Cable Manufacturing
PVC and XLPE insulation curing and drying in cable extrusion lines
PVC Profiles
Window profile, door frame, and decorative PVC profile extrusion drying and cooling
Recycling Plants
Washed and size-reduced recycled plastic flake drying before regranulation
✓ Supply & Support: Vayuvents manufactures plastic industry hot air blowers at our Vasai, Mumbai works. We have supplied to injection moulding and extrusion plants in Daman, Silvassa, Rajkot, and Ahmedabad. We provide blower selection matched to your specific plastic material and dryer configuration.
FAQs
Hygroscopic plastics that absorb moisture from the air and must be dried before moulding include: Nylon (PA) — requires 0.2 percent or less moisture, PET — 0.02 percent or less, Polycarbonate (PC) — 0.02 percent or less, ABS — 0.1 percent or less, and Acetal (POM) — 0.2 percent or less. Non-hygroscopic plastics like PP, PE, and PS do not require drying in normal conditions.
Typical drying temperatures: Nylon (PA6) at 80 to 90 degrees Celsius for 4 to 6 hours, PET at 160 to 180 degrees Celsius for 4 to 6 hours, Polycarbonate (PC) at 120 to 125 degrees Celsius for 3 to 4 hours, ABS at 80 to 85 degrees Celsius for 2 to 3 hours. Vayuvents supplies hot air blowers across this full temperature range.
A hot air dryer simply heats ambient air and blows it through the plastic granule bed — suitable for less hygroscopic plastics and in low-humidity conditions. A dehumidifying dryer (desiccant dryer) removes moisture from the air before heating it, providing much lower dew point inlet air — essential for highly hygroscopic plastics like PET, PC, and PA in humid conditions. Vayuvents supplies blowers for both types.
Yes. Hot air blowers are used in PVC extrusion lines for: preheating PVC compound before feeding to the extruder, heating calibration dies, and in some cases for post-extrusion shape setting. PVC processing temperatures are typically 160 to 190 degrees Celsius and Vayuvents supplies hot air blowers rated for these temperatures.
The required airflow depends on the granule throughput, specific heat of the plastic, moisture content to be removed, and required drying time. As a rough guide, 3 to 5 m3/hr of air per kg/hr of granule throughput is typical for most hopper dryers. Vayuvents provides airflow calculations for your specific plastic material and production rate.
Yes. Vayuvents supplies hot air blowers for PET preform reheating ovens in blow moulding lines where precise and uniform heating of PET preforms before blowing is critical for bottle wall thickness uniformity and mechanical properties.
Contact Vayuvents at enquiry@vayuvents.com or call +91 90961 88703. Share the plastic material being processed, required drying temperature, granule throughput in kg/hr, and dryer type. We will size the correct hot air blower and provide a technical and commercial proposal within 24 hours.
