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9-Zone Extruder Heating with ±1°C Accuracy – PP Strapping Line

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9-Zone Extruder Heating with ±1°C Accuracy – PP Strapping Line

Brand Name : CHUQI

Model Number : CQ-SPP120-6

Place of Origin : CHINA

MOQ : 1SET

Price : USD/RMB

Supply Ability : 10SETS

Delivery Time : 60DAYS

Packaging Details : WOODEN BOX

Payment Terms : T/T

Heating zones : 9 zones

Barrel zones : 6 zones

Die head zones : 3 zones

Heater type : Cast aluminum

Cooling fans : 6 centrifugal

Temp. range : 0-399°C

Temp. accuracy : ±1°C

Control method : PID closed-loop

Energy saving : Zone heating

Monitoring : Real-time curves

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9-Zone Extruder Heating with ±1°C Accuracy – PP Strapping Line
Precision Temperature Control

Precise and stable temperature control is fundamental to ensuring uniform plasticization and stable extrusion of PP material. This extruder features 9 independent cast aluminum heaters (6 zones on the barrel, 3 zones on the die head) paired with 6 centrifugal cooling fans, forming a fully automatic closed-loop PID temperature control system.

The system monitors each zone in real-time, automatically adjusting heating or cooling to keep deviations within ±1°C, ensuring uniform melt temperature. 9-zone independent control allows setting a temperature gradient along the screw length: lower in the feed zone, gradually increasing in the compression and metering zones, and constant in the die head.

This fine temperature control capability effectively avoids quality issues such as poor plasticization, gels, and uneven thickness caused by temperature fluctuations, laying the foundation for high-precision, high-stability extrusion production.

Technical Specifications
Parameter Value
Total Heating Zones 9 zones
Barrel Heating Zones 6 zones
Die Head Heating Zones 3 zones
Heater Type Cast aluminum bands
Number of Cooling Fans 6 units (centrifugal)
Temperature Control Range 0 - 399°C
Control Accuracy ±1°C
Control Mode PID fully automatic closed-loop
Key Features
  • Multi-zone independent: 9 zones with independent control for different temperature gradients
  • High accuracy: ±1°C fluctuation, far exceeding typical ±2-3°C industry standard
  • Fast response: PID algorithm with bidirectional heating/cooling adjustment
  • Cast aluminum heaters: Large contact area, uniform heat transfer, long life
  • Adequate cooling: 6 centrifugal fans prevent overheating
  • Temperature gradient: Adapts to solids conveying, melting, homogenization stages
  • Reduced gels: Avoids local overheating that forms gels
  • Thickness stability: Stable temperature leads to stable output and uniform thickness
  • Energy efficient: Zone heating avoids unnecessary energy waste
  • Easy monitoring: Real-time temperature curves on touch screen
Frequently Asked Questions
What are the practical benefits of 9-zone independent temperature control?
It allows setting a temperature gradient along the screw length. Typically, the feed zone is lower, the compression and metering zones gradually increase, and the die head is constant. This gradient facilitates solids conveying, melting, and homogenization, avoiding local overheating or under-plasticization, improving product quality.
What is the difference between cast aluminum heaters and ordinary mica heaters?
Cast aluminum heaters have larger contact area and tighter fit with the screw/barrel, providing higher heat transfer efficiency and more uniform temperature distribution. They are also mechanically stronger, corrosion-resistant, and longer-lasting, making them standard for large extruders.
How do the cooling fans work? Do they waste heat?
The fans only operate when the temperature exceeds the setpoint, blowing air to cool the barrel surface. They operate intermittently, and the heat has already been used for plasticization, so there is no waste. Instead, they prevent overheating and protect the equipment.

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