Low & High Speed Haul-Off Units for Precise Tension – PP Strap Extrusion Line

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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
Brand Name	CHUQI
Model Number	CQ-SPP120-6
Place of Origin	CHINA

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Product Details
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Product Specification


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	Brand Name	CHUQI
Model Number	CQ-SPP120-6	Place of Origin	CHINA
High Light	PP strap extrusion haul-off units ，high speed PP strapping production line ，low speed tension haul-off units

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.

Company Details

Bronze Gleitlager

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and

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from Quality China Factory

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Business Type:

Manufacturer 
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Year Established:

2012 
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Total Annual:

5000000-8000000
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Employee Number:

50~60 
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Ecer Certification：

Verified Supplier 

Jiaxing Chuanqi Machinery Equipment Co., Ltd. is a high-tech enterprise that specializied in the research and develop and manufacture of Paper strap production line, PP box strap production line and all kinds of automatic winder and PP PET strapping. Vision: Committed to becoming t... Jiaxing Chuanqi Machinery Equipment Co., Ltd. is a high-tech enterprise that specializied in the research and develop and manufacture of Paper strap production line, PP box strap production line and all kinds of automatic winder and PP PET strapping. Vision: Committed to becoming t...

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Jiaxing Chuanqi Machinery Equipment Co., Ltd.
Yucheng town, Haiyan County, Jiaxing City, Zhejiang Province, China
https://www.strappingwinder.com/

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