Web Deviation Device for Lap Winder Entrance Angle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing deviation devices on spinning lines negatively influence the entrance angles of webs into the drawing group of lap-winders, affecting the quality of processing.
Innovation Solution
A deviation device comprising a creel with primary and final deviators, including adjustable roller groups and auxiliary rollers, optimizes the trajectory of webs to ensure they enter the drawing group along a controlled path, improving alignment and processing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deviation devices are used, then the structure is simple, but the entrance angles of webs into the drawing group are negative and affect processing quality
Solution Approach 1:
The deviation device is divided into multiple independent deviators (first deviator, second deviator, third deviator) that can be adjusted separately. Each deviator handles a specific section of the web trajectory, allowing precise control of entrance angles without requiring complete redesign of the entire deviation system.
Solution Approach 2:
The deviators are designed with adjustable positions and angles, enabling dynamic adaptation to different web types and processing requirements. This adjustability allows the system to maintain optimal entrance angles for various operating conditions while preserving structural simplicity through modular design.
2Manufacturing precision
If the web trajectory is not controlled, then the device operation is simple, but the entrance angles are inconsistent and affect quality
Solution Approach 1:
The first deviator is positioned to preliminarily guide the web from the can toward the drawing group before the web enters the main processing path. This preliminary deviation ensures that subsequent deviators only need to make minor adjustments, maintaining consistent entrance angles while simplifying the threading operation by pre-positioning the web.
Solution Approach 2:
The second and third deviators act as intermediary elements between the web source and the drawing group, progressively adjusting the web trajectory. These intermediary deviators break down the complex trajectory control into manageable stages, ensuring angle consistency without requiring complex single-step adjustment mechanisms.
3Adaptability or versatility
If fixed deviation structure is used, then the device is simple, but it cannot adapt to different web requirements
Solution Approach 1:
Each deviator is designed with multi-functional capability, serving both as a structural support element and as an adjustable trajectory control element. The same deviator structure can be adjusted to handle different web types, tensions, and desired entrance angles, providing universal adaptability without requiring multiple specialized components.
Solution Approach 2:
The deviators allow change of geometric parameters (position, angle, orientation) to adapt to different web requirements. By adjusting these parameters, the system can optimize the web trajectory for various processing conditions while maintaining a relatively simple base structure that doesn't require complex mechanisms for each adjustment.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A lap-winder apparatus (1) on a spinning preparation line, comprises a deviation device of the webs to the lap-winder. The device comprises a final deviator (60) comprises a plurality of fixed or rotating deviation units (62) positioned on the working width of the drawing head, which form an upper abutment for the deviated web. In one embodiment variation, the device comprises an auxiliary deviator (90) comprising a plurality of rotating auxiliary rollers (92), sub-divided into two groups (92a, 92b) externally to the working width of the drawing head.