Hopper Dryer

Hopper Dryers

These hopper dryers are mainly applied to plastic material drying efficiently. High temperature hot air makes the moisture content of raw materials low and stable after drying, which can meet the technical and quality requirements of plastic production.

Hopper capacities range from 12~1500kgs can be offered for selection. Commonly used in a variety of plastic molding industries like injection blowing and blow molding machine.

Features:

1. The hot air inlet elbow design of the up-blow dryer can prevent dust piling up at the bottom of the heaters to avoid burning.
2. To adopt hot air diffuser device of shade separator and screen separator for acquiring an even hot air flow to keep the plastics dry at an even temperature and improve drying efficiency.
3. Sound-proof blower isolate the dust entering the raw material to ensure material free from contamination.
4. All material contact surfaces are made of stainless steel to avoid material contamination.
5. Precise aluminum casting hopper barrel features smooth surface & good performance on temperature keeping.
6. Hopper barrel separated from its base, easy cleaning and change material quickly.
7 Hopper barrel and base are fitted with see-through windows to observe inside material level.
8. Equipped with inlet cover, easy to install autoloader.
9. Double Safety device with overheat and overload protection. Reduce accidents caused by human or mechanical failure.
10. Hot air recyclers(option)to make hot air form a semi-closed circulated loop to speed up hot air circulation for shorten heating time to achieve energy saving up to 30%.
11. Exhaust-air filter can be installed (option), filter dust to avoid air pollution, ensure the clean working environment,hopper magnet also can be installed for screening iron debris and other functions.
12. Optional 7-day auto start/stop timers,automatic switch on and off once a week, can save electricity and effectively arrange work efficiency.

Parameter

Key Application Areas

A. Plastic Processing & Injection Molding
Core Function: Pre-drying hygroscopic plastics (e.g., nylon, PET, PVC,HDPE,ABS) to eliminate moisture-induced defects like bubbles or cracks during molding.

Case Study: A leading automotive parts manufacturer reduced the moisture content of nylon 66 from 0.8% to 0.02% using Lienther’s drying system, achieving smoother surface finishes and enhanced mechanical strength in components.

Materials Supported: Engineering plastics (PC, POM), biodegradable polymers, and recycled resins.

B. Pharmaceutical & Chemical Industries
Low-Temperature Drying: Preserves active ingredients in heat-sensitive pharmaceuticals with precise temperature control (40–80°C).

Compliance: GMP-compliant designs with stainless steel chambers and contamination-free airflow for sterile environments.

C. New Energy & Advanced Materials
Battery Material Production: Dries lithium-ion battery components  to prevent moisture-induced performance degradation.

Powder Processing: Ensures uniform particle size in ceramic powders, metal alloys, and 3D printing materials.

D. Food Processing
Spray Drying Applications: Transforms liquid concentrates into free-flowing powders while retaining nutritional value and flavor.