Spear Transpower

Hopper Dryer is a hot air drying machine used to remove moisture from plastic raw material (granules) before processing.Moisture-free material gives:

Better surface finish
No bubbles / silver streaks
Strong final product

1.  Working Principle (Technical)

Hopper Dryer works on Hot Air Circulation System:
Air is heated by electric heaters
Hot air is circulated through plastic granules
Moisture evaporates and exits through air outlet
Dry granules fall directly into machine hopper
�� Typical drying temperature:
ABS / PP / HDPE : 80–100°C
Nylon : 120–160°C
PET : 160–180°C
�� Key Technical Specifications
Capacity: 25 LTR / 50 LTR / 100 LTR / 200 LTR+
Heater Power: 2 kW – 9 kW
Blower Motor: 0.25 – 1 HP
Temperature Control: Digital PID Controller
Material: SS Inner Chamber
Power Supply: Single Phase / Three Phase
 Advantages of Hopper Dryer Removes moisture efficiently Improves product quality Reduces rejection & wastage Easy to install on machine Low maintenance & long life
 Applications
Injection Moulding Machine
Blow Moulding Machine
Extruder Machine
Plastic Recycling Plant
Common Problems Without Dryer
 Bubbles in product Poor strength Surface defects Machine processing issues
 Important Technical Tip
Always select Hopper Dryer based on:
Material type
Required drying temperature
Throughput (kg/hr)
Ambient humidity