TCR Series Controller Applied in Heating Tunnel Dryer for Food Packaging

In the food packaging industry, maintaining consistent heating during the sealing process is crucial for both product quality and packaging integrity. One of our OEM customers recently implemented the TCR Series Digital Temperature Controller in a tunnel-type dryer used for plastic food wrap heat sealing.

Project Overview

• Application: Tunnel dryer for continuous plastic packaging sealing
  
• Industry: Food packaging machinery
  
• Load Type: Resistive heating elements (stainless steel heater bars)
  
• Control Method: ON/OFF control with relay output
  
• Sensor Used: K-type thermocouple
  
• Controller Used: TCR Series (ON/OFF mode with relay output)
  

Why Choose the TCR Series?

The OEM had previously used a basic bimetal thermostat, which lacked display, accuracy, and long-term reliability. After switching to the TCR Series, they gained:

✅ Real-time digital temperature display
✅ Stable ON/OFF switching, preventing overheating or temperature drops
✅ Easy setup with 100ms response time and ±0.5% display accuracy
✅ Long mechanical relay life, suitable for continuous 24/7 operation

Result

The TCR controller has helped reduce plastic burn marks and sealing inconsistencies by maintaining a stable 180°C in the heating zone. Customer feedback reports:

• Fewer product defects
  
• Improved operator visibility
  
• Minimal maintenance over 6 months of daily use
  

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