How can the uniformity of spandex double-covered yarn be controlled?

Release time： 2025-11-11

【Summary】 Core yarn tension: Utilizing a magnetic-damping tensioner (such as the German Karl Mayer system), the spandex core yarn tension is monitored in real time, and the damping force is dynamically adjusted via PLC.

1. Tension Closed-Loop Control (Key Metric: Tension Deviation ≤ ±0.1 cN)

Core yarn tension: A magnetic-damping tensioner (such as the German Karl Mayer system) is used to monitor spandex core yarn tension in real time, with the PLC dynamically adjusting the damping force accordingly.
- Fine-denier spandex (20-30D): Set tension to 0.5–1.0 cN; if deviation exceeds ±0.1 cN, the machine will automatically stop and trigger an alarm.
- Coarse-denier spandex (40-70D): Set tension at 1.5–2.0 cN, with a tension fluctuation compensation algorithm (compensation response time ≤ 0.1 second).
Outsourced Yarn Tension: A dual-channel independent tension control system ensures that the tension difference between the two outsourced yarns is ≤0.2 cN, preventing coating misalignment caused by uneven tension—where one side becomes tight while the other remains loose.

2. Dual-spindle synchronous control (synchronization accuracy ≤ ±5 RPM)

Servo drive system: Equipped with Delta B2 series servo motors (or a brand offering equivalent precision), the system features closed-loop speed control with dual spindles, ensuring a speed fluctuation rate of ≤±0.5%.
Mechanical Drive Optimization: A two-stage transmission mechanism replaces the traditional oil-bath gearbox, significantly reducing transmission backlash (backlash ≤ 0.01mm) and ensuring stable, vibration-free high-speed rotation of the spindle at 10,000 rpm.

3. Precision Calibration of the Yarn Guide System

Yarn guide hook positioning: The center of the yarn guide hook must be aligned within ≤0.1 mm of the spindle axis. Calibrate weekly using a laser alignment tool.
Transverse yarn guide: At a transverse movement frequency of 500 cycles per minute, the positioning error is ≤±0.05 mm, preventing yarn misalignment that could lead to either overly dense or overly sparse local coverage.

Recommended News

A synthetic fiber doubling and twisting machine is a common type of textile machinery.

The synthetic fiber double-twisting machine is a common textile machinery that achieves two twists per revolution during the twisting process, dramatically boosting efficiency. It enables large-capacity, seamless winding and produces high-quality yarns.

2023/07/23

Coating wire machine replaces traditional painting processes

The coating wire machine has widely replaced traditional painting techniques in this field, but to achieve optimal results, proper installation is essential before use. So, let us now walk you through the correct installation steps for the coating wire machine:

2023/07/23

What is the core function of a sheathing machine?

By precisely controlling the wrapping angle, tension, and thickness, functional materials—such as metal wires, elastic fibers, and conductive yarns—are integrated with base substrates to achieve enhanced strength (e.g., carbon fiber-coated reinforced plastics), tailored elasticity (e.g., spandex-coated yarns for textiles), or specialized functionalities (e.g., conductive-coated filaments for smart wearable devices).

2025/11/11

xianfeng.shi@hotmail.com

Telephone

Manager Shi (0)13906856597

Address

No. 8, Huaguang 1st Road, High-Tech Park, Xinchang County, Zhejiang Province

Business license

How can the uniformity of spandex double-covered yarn be controlled?

Sorry，当前栏目暂无内容!

Sorry，The current column has no content!