Moisture Enters Resin
PA, PC, PET, PBT and other hygroscopic materials absorb water during storage and handling.
Dehumidifying Dryer Series
Drying and Dehumidifying Equipment
Drying and dehumidification equipment is primarily used in the injection molding and plastics processing industries. The product range includes honeycomb rotor dehumidifiers, compact 3-in-1 dehumidifying dryers, energy-efficient dryers, and more. Featuring PID temperature control, energy-saving airflow designs, and comprehensive safety protection functions, these units enhance product quality while reducing energy consumption.
Please make your selection based on factors such as resin type, hourly throughput, drying temperature, required dew point, available space, and quality requirements for the final product.
Products
Drying and Dehumidifying Equipment
Products
Drying and Dehumidifying Equipment
- High Performance
- Reliability
- Durability
- Universally Applicable
TCDHE Series 3-in-1 Honeycomb Energy-Saving Dehumidifying Dryer
The TCDHE Series 3-in-1 Honeycomb Energy-Saving Dehumidifying Dryer integrates variable-frequency energy-saving technology with heat recovery capabilities, reducing energy consumption by up to 60%. Equipped with an advanced honeycomb rotor, the unit maintains a stable dew point of -40°C, ensuring consistent, highly precise drying performance. An optimized airflow design—complemented by a “lantern-style” air outlet and a three-zone thermal insulation structure—guarantees uniform, thorough drying of the material. 1. Up to 60% Energy Savings 2. Stable dew point at -40°C 3. Third-generation PID algorithm adapts to ambient changes. 4. Offset inlet/outlet design enhances dehumidification
TDN Series Nitrogen Dryer
The TDN Series Nitrogen Dryer is designed for optical and high-precision injection molding applications, utilizing over 98% high-purity nitrogen to effectively reduce oxidation, yellowing and moisture-related defects. With a fully enclosed nitrogen circulation system and advanced filtration technology, it delivers ultra-clean, energy-efficient drying performance while improving product quality and reducing maintenance costs. 1. >98% High-Purity Nitrogen 2. Reduced Oxidation & Yellowing 3. 0.3 μm × 99.99% Filtration 4. Enclosed Nitrogen Circulation 5. Extended Screw Carbonization Time
TDA/TDB Double Hopper 3 in 1 Compact Dehumidifying Dryer
The TDA/TDB double hopper 3 in 1 compact dehumidifying dryer is an integrated system with two hoppers, capable of drying two different plastic materials simultaneously at different temperature settings. It retains all the core functions of a standard three-in-one system—dehumidification, drying, and conveying—while saving energy and space. This design is particularly suitable for multi-material injection molding, color changes, or small-batch production, offering advantages such as flexibility, high efficiency, and low operating costs.
TCDH Series 3 in 1 Compact Dehumidifying Dryer(Honeycomb Rotor)
The TCDH 3 in 1 compact dehumidifying dryer utilizes a high-performance honeycomb rotor to deliver stable, low-dew-point dry air, thereby enhancing the processing quality of precision- and optical-grade plastics. Its dual-cooler dehumidification system ensures consistent drying performance, while the sealed conveying circuit effectively prevents material re-absorption of moisture and contamination. 1. 3-in-1 Integrated System 2. High-Performance Honeycomb Rotor 3. Dual-Cooler Dehumidification Technology 4. Sealed Conveying System 5. Optical-Grade Design
TCDE Series 3 in 1 Compact Dehumidifying Dryers (Energy-Saving Type)
The TCDE Series 3-in-1 Compact Dehumidifying Dryer integrates dehumidification, drying, and multi-stage conveying into one compact, energy-efficient system. With a dew point as low as -40°C, it provides stable dry air to improve the quality of hygroscopic and optical-grade plastics. The insulated drying hopper and fully enclosed conveying system reduce heat loss and prevent moisture reabsorption, ensuring efficient and consistent drying performance. 1. 3-in-1 Integrated Design 2. -40°C Low Dew Point 3. Energy-Efficient Drying System 4. Moisture-Proof Conveying 5. Smart Control & Protection 6. High-Precision Plastic Processing
TDH Series Honeycomb Rotor Dehumidifiers
The Honeycomb Rotor Dehumidifier mainly works with hopper dryers, which are specialized for drying engineering plastics that are highly hygroscopic, such as Nylon, PC, PBT, PET, etc. It adapts high efficiency rotor, which can ensure a dew point at -40°C with a stable dehumidifying effect. 1. ≤ -40°C Low Dew Point for Precision Molding. 2. Silica-Gel Honeycomb Rotor for Energy Savings. 3. Dual-Cooler System for Stable Humidity Control. 4. Dust-Proof Filtration for Longer Service Life. 5. Compact Design for Flexible Factory Integration.
TCD Series Cabinet Dryers
The TCD Series Cabinet Dryers are mainly applied to plastic material drying, particularly for simultaneous drying of various plastic materials with small quantities or for trialmolding purpose. It can avoid annoy on changing and cleaning plastic materials to save working time. All these models adopt precise P.I.D. temperature control and a 24-hour timer to start/close the dryer at the set time, with drying temperature up to 200°C. This series has superior features in easy operation, stable function, and low consumption. 1. PID Temperature Control for Stable Drying Quality. 2. Hot Air Circulation & Heat Recovery for Higher Efficiency. 3. Stainless Steel Trays for Clean Material Processing. 4. Multiple Safety Protections for Reliable Operation.
THDP Series Hot Air Dryer
The Topstar THDP Series Hot Air Dryer delivers efficient, intelligent, and energy-saving drying performance for injection molding applications. Featuring PID temperature control with ±1°C accuracy, smart timer programming, and optional RS485/MODBUS RTU communication, it enables precise operation and seamless integration into smart manufacturing systems. The double-layer insulated drying module and optimized air outlet design improve energy efficiency and drying consistency while ensuring safe operation. 1. ±1°C Precise Temperature Control 2. Smart Factory Connectivity 3. Energy-Saving Insulated Design 4. Optimized Air Flow System 5. Comprehensive Safety Protection
THD Series Hot Air Dryer
Topstar THD series hot air dryers are designed specifically for standard plastic materials used in injection molding, achieving rapid and stable drying through precise temperature control and uniform hot air distribution. With a temperature resolution of 1°C, PID auto-tuning, and a top diffusion system, this hot air dryer ensures consistent drying performance while minimizing material contamination and enhancing operational safety. 1. Precise Temperature Control 2. Uniform Hot Air Distribution 3. Stainless Steel Contact Parts 4. Built-In Over-Temperature Protection 5. Simple & User-Friendly Control
Moisture Control Before Plasticizing
The quality problem often begins before the resin enters the machine.
The raw material absorbs moisture from the surrounding air. If this moisture is not removed and excluded, the heat within the injection molding machine’s barrel can trigger a hydrolysis reaction, resulting in surface defects, gas marks, bubbles, reduced strength, and dimensional instability in the finished product.
Heat Reveals the Defect
Moisture becomes steam or reacts with the polymer during melting, damaging appearance and properties.
Open Transfer Re-Wets It
Even well-dried resin can reabsorb moisture when the conveying path is exposed to plant air.
A Closed Loop Stabilizes It
Low-dew-point air, controlled heat and sealed conveying preserve the prepared material until molding.
FOUR CONTROL POINTS FOR RELIABLE RESIN DRYING
Control moisture at every stage prior to molding.
Reliable resin drying depends on more than temperature alone. Dew point, airflow, drying temperature, residence time, and sealed material transfer must work together to remove moisture and prevent re-wetting before molding.
Generate Low-Dew-Point Air
Honeycomb rotor or nitrogen technology removes water from the process-air stream before drying begins.
Control Temperature, Airflow & Time
Deliver uniform heated airflow through the resin while maintaining the drying temperature and residence time required for consistent moisture removal.
Convey Without Re-Wetting
Keep dried resin isolated from humid plant air in a sealed conveying path until it reaches the injection molding machine.
Record, Schedule & Protect
Touch control, trend records, weekly scheduling, communications and layered alarms support repeatable production.
Core Drying & Dehumidifying Technologies
Stable dew point with lower energy loss and cleaner material handling.
Topstar’s drying and dehumidification equipment integrates rotor performance, thermal management, airflow design, clean conveying, and intelligent control. It can be configured based on resin characteristics, factory operating conditions, and product quality targets.
High-Performance Honeycomb Rotor
Optimized honeycomb rotor sealing and airflow paths continuously remove moisture from the process air, helping maintain a stable low-dew-point air supply for reliable resin drying.
Three-Zone Isolation & Airflow Design
Thermal isolation around the rotor and offset airflow paths reduce heat transfer and help improve dehumidification efficiency.
Variable Frequency + Heat Recovery
Demand-based fan control, insulation and recovered process heat reduce wasted energy while protecting drying performance.
Keep the Material Path Clean and Sealed
Closed conveying, clean hot-air piping, high-efficiency filtration and polished contact surfaces help control dust and contamination.
Monitor and Manage the Drying Process
A 7-inch touch interface supports operating records, temperature and dew-point trends, weekly scheduling and RS485/MODBUS RTU integration.
Layered Equipment & Resin Protection
Overtemperature, motor, phase and fan monitoring work with anti-overdrying and optional barcode verification to reduce process risk.
DRYING & DEHUMIDIFYING SYSTEM Equipment
We offer dehumidifying dryers designed to meet a wide range of production needs.
To meet the diverse production needs of our customers, we offer a range of dehumidifying dryers designed to deliver energy-efficient, intelligent, and highly effective drying and dehumidification results.
Platform / 01 · Energy Priority
TCDHE Energy-Saving Honeycomb Series
Honeycomb dehumidification, heat recovery and variable-frequency options balance stable low-dew-point drying with reduced energy use.
Best for: continuous hygroscopic-resin production with high energy-efficiency targets.
Platform / 02 · Integrated Precision
TCDH 3-in-1 Honeycomb Series
Dehumidifying, drying and multi-stage conveying are integrated into one compact system with a sealed material path.
Best for: PA, PC, PBT, PET, precision molding and optical-grade configurations.
Platform / 03 · Dual Material
TDA / TDB Double-Hopper Series
Two hoppers condition different resins at their required temperatures while sharing a compact integrated system.
Best for: two-material molding and production lines requiring material switching.
Platform / 04 · Oxidation Control
TDN Nitrogen Plastic Dryer Series
A high-purity nitrogen environment combines low-moisture drying with reduced oxygen exposure in a closed-loop material system.
Best for: optical polymers and oxidation-, yellowing- or appearance-sensitive products.
APPLICATION-SPECIFIC DRYING MACHINES
Configure the Dehumidifying Dryer Around Material Cleanliness and Part Quality.
Optical-grade, additive-rich and appearance-sensitive materials require more than stable drying temperature. Filtration, sealed conveying, material-contact surfaces and equipment protection can be configured around the resin and final part quality requirements.
Clean, Closed Material Path
- 0.3 μm × 99.99% high-efficiency filtration option
- Polished hopper, material cup and conveying pipes
- Fully sealed loop and non-contact material shut-off
- Fluidized material cup for improved dust removal
Protect Airflow Components
- Oil filtration and drainage protect fans and the rotor
- Larger dehumidifying capacity supports difficult resin additives
- Designed around stable operation with oil-bearing materials
- Service-friendly maintenance points reduce contamination buildup
High-Visibility Surface Quality
- Polished material-contact surfaces and dedicated feed port
- 0.5 μm dry-air and conveying filtration option
- Temperature and dew-point trend visibility
- Layered safety protection for stable continuous production
Drying System Selection Guide
How do you select the dehumidifying dryer based on material and production requirements?
The appropriate plastic dryer can be selected based on the characteristics of the resin. By considering the resin’s hygroscopic properties and the quality requirements of the finished parts, one can determine the dew point, throughput, drying time, conveying conditions, and control requirements.
Identify Resin & Moisture Sensitivity
Confirm material type, initial moisture, glass fiber, regrind and oil-bearing additives.
Set Dew Point & Quality Target
Define the finished-part requirement: structural, dimensional, transparent or optical-grade.
Calculate Throughput & Residence Time
Match hourly consumption, drying temperature, drying time and hopper capacity.
Route Planning and Conveying Conditions
Include conveying distance, number of machines, two-material requirements and re-wetting risk.
Add Energy, Data & Protection Options
Select heat recovery, VFD, filtration, dew-point display, barcode checks and MODBUS links.
Standard non-hygroscopic resinTHD / THDP hot-air drying
Hygroscopic precision resinTDH / TCDH / TCDE low-dew-point drying
Energy-priority productionTCDHE heat-recovery
Oxidation-sensitive opticsTDN nitrogen / optical-grade configuration
Training for Installation and Operation Correctly
Topstar Service
We have a comprehensive after-sales training system. To address potential issues and ensure optimal operation, we provide you with the necessary training resources for installing and operating the packaging machine.
- Instructions for Use – Installation Steps and Operating Precautions
- Video demonstration of installation and debugging
- On-site training – additional service fee required
Technical Support
Whether your business is located in Europe, North America, or the Middle East, we provide global services, and our experts are on call to provide technical support services through video calls or on-site assistance. Services include:
- First installation and debugging of equipment
- Daily debugging and maintenance
- Emergency fault assistance
- Equipment optimization services
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- 24H Technical Support
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