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Low & High Speed Haul-Off Units for Precise Tension – PP Strap Extrusion Line
Low & High Speed Haul-Off Units for Precise Tension – PP Strap Extrusion Line
Specifications
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
Low speed :
0-40 m/min
High speed :
0-250 m/min
Low power :
5.5 KW
High power :
15 KW
Speed accuracy :
±1 m/min
Roller hardness :
HRC58-60
Control method :
Closed-loop linkage
Tension adjustment :
Real-time automatic
Description
Low & High Speed Haul-Off Units for Precise Tension – PP Strap Extrusion Line
Precision Tension Control System

Tension control is a critical factor affecting product thickness uniformity, stretching orientation effectiveness, and final winding quality in PP strapping production. This production line features a multi-stage haul-off system consisting of a low-speed three-roller haul-off unit (0-40 m/min, 5.5KW) and a high-speed five-roller haul-off unit (0-250 m/min, 15KW), as well as multiple high-speed three-roller units (0-250 m/min, 5.5KW), forming a stepped speed and tension control network. The low-speed unit stabilizes the nascent tape after extrusion, while the high-speed units provide precise tension adjustment after stretching and setting. Multi-stage haul-off combined with closed-loop speed control ensures constant, fluctuation-free tension across all sections, providing a solid foundation for high-precision, high-speed production.

Technical Specifications
Haul-off Unit Speed Range Motor Power Rollers Installation Position
Low-speed 3-roller 0-40 m/min 5.5 KW 3 After first tank, before extension box
High-speed 5-roller 0-250 m/min 15 KW 5 After extension box, before embosser
High-speed 3-roller (multiple) 0-250 m/min 5.5 KW 3 After oven, after secondary tank, etc.
Key Features & Benefits
  • Low-speed unit: Gentle traction of nascent tape prevents stretching deformation
  • High-speed units: Precise tension control after stretching and setting
  • Speed accuracy: ±1 m/min, full-line closed-loop synchronization
  • Chrome-plated rollers: HRC58-60 hardness, wear-resistant and non-damaging
  • Stable tension: Multi-stage traction eliminates cumulative tension fluctuations
  • Fast response: Inverter/servo drives for instant tension adjustment
  • Reduced scrap: Stable tension ensures uniform thickness, reducing dimensional rejections
  • High-speed compatible: High-speed units support 250 m/min line speed
  • Coordinated control: PLC unified coordination for easy operation
  • Quality enhancement: Constant tension ensures consistent product performance
Frequently Asked Questions
Why are both low-speed and high-speed haul-off units needed?
The low-speed unit stabilizes the nascent tape after extrusion and before stretching, preventing accidental deformation of not-fully-cooled tape. The high-speed units transport the stretched and set finished tape, meeting high line speed demands. Stage-specific control optimizes tension matching at each section, improving overall stability.
How is speed synchronization ensured among multiple haul-off units?
The entire line uses PLC closed-loop coordinated control. The operator sets the main line speed on the touch screen, and the system automatically calculates the speed ratios for each haul-off unit, precisely executed via inverters. Individual units can be fine-tuned independently to suit different draw ratios and process requirements.
How much tension deviation triggers automatic adjustment?
Tension sensors monitor in real-time. When the actual tension deviates from the setpoint by more than ±2%, the control system immediately fine-tunes the speed or torque of the relevant haul-off motor, bringing tension back within range. This process occurs in milliseconds, virtually imperceptible to the operator.
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Low & High Speed Haul-Off Units for Precise Tension – PP Strap Extrusion Line

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Product Detail
Brand Name :
CHUQI
Model Number :
CQ-SPP120-6
Place of Origin :
CHINA
MOQ :
1SET
Price :
USD/RMB
Supply Ability :
10SETS
Contact Supplier
Low & High Speed Haul-Off Units for Precise Tension – PP Strap Extrusion Line

Jiaxing Chuanqi Machinery Equipment Co., Ltd.

Verified Supplier
3 Years
zhejiang, jiaxing
Since 2012
Business Type :
Manufacturer
Main Products :
PET Strap Winder, PP Strap Winder, Paper Strapping Production Line
Total Annual :
5000000-8000000
Employee Number :
50~60
Certification Level :
Verified Supplier
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