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Multi-Stage Haul-Off System with Precise Tension Control Closed-Loop Linkage for PP Strapping Production

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Multi-Stage Haul-Off System with Precise Tension Control Closed-Loop Linkage for PP Strapping Production

Brand Name : CHUQI

Model Number : CQ-SPP120-6

Place of Origin : CHINA

MOQ : 1SET

Payment Terms : T/T

Supply Ability : 10SETS

Delivery Time : 60DAYS

Packaging Details : WOODEN BOX

Configuration : Low-speed + high-speed multi-stage

Roller spec : φ268mm

Surface hardness : HRC58-60

Speed range : 0-250 m/min

Adjustment accuracy : ±1 m/min

Control method : Closed-loop linkage

Core value : Precise tension control

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Multi-Stage Haul-Off System (Low-Speed & High-Speed Units) for Precise Tension Control
Product Introduction

Tension control is a critical factor affecting product thickness uniformity, stretching orientation effectiveness, and final winding quality in PP strapping production. This production line utilizes a multi-stage haul-off system consisting of a low-speed three-roller haul-off unit (0-40 m/min), a high-speed five-roller haul-off unit (0-250 m/min), and multiple high-speed three-roller haul-off units, 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.

Main Specifications
  • Low-speed three-roller haul-off: φ268mm, face width 450mm, chrome-plated & polished, hardness HRC58-60, speed 0-40 m/min, motor 5.5KW
  • High-speed five-roller haul-off: φ268mm, face width 450mm, chrome-plated & polished, hardness HRC58-60, speed 0-250 m/min, motor 15KW
  • High-speed three-roller haul-off (multiple units): same specs, speed 0-250 m/min, motor 5.5KW
  • Speed adjustment accuracy: ±1 m/min
  • Control method: Inverter speed control, full-line closed-loop linkage
Technical Parameters
Item Low-speed 3-roller High-speed 5-roller High-speed 3-roller
Roller Diameter φ268mm φ268mm φ268mm
Face Width 450mm 450mm 450mm
Surface Treatment Chrome-polished Chrome-polished Chrome-polished
Hardness HRC58-60 HRC58-60 HRC58-60
Speed Range 0-40 m/min 0-250 m/min 0-250 m/min
Motor Power 5.5 KW 15 KW 5.5 KW
Adjustment Accuracy ±1 m/min ±1 m/min ±1 m/min
Customer Questions & Answers
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 requirements. Stage-specific control optimizes tension matching at each section, improving overall stability.
What are the advantages of a five-roller haul-off over a three-roller one?
The five-roller structure provides a larger wrap angle and more uniform pressure distribution, offering stronger gripping force. This is especially beneficial for high-speed operation or smooth-surfaced PP tape, effectively preventing line speed fluctuations and tension spikes caused by slippage.
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.

Product Tags:

PP strapping production haul-off system

      

multi-stage strapping tension control

      

closed-loop PP strapping production line

      
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