Device for producing a lap coil
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Solution Overview
Problem
Existing devices for producing cotton wraps face challenges in achieving high-quality wraps due to long transport routes, which lead to fiber misalignment, damage, and unevenness, resulting in suboptimal cotton wraps.
Innovation Solution
A compact device design that integrates at least one stretching plant, a calander, and a wrap unit within a single machine frame, with controlled walking paths for the pre-wadding railways to minimize contact with leadership elements and reduce fiber damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pre-lap web is transported over long distances from the drafting system to the calendering system, then the device can be designed with separate components, but the fiber strands become misaligned and damaged resulting in incorrect drafting
Solution Approach 1:
The patent combines the drafting system and calendering system into a single integrated unit where the calendering system is directly coupled to the drafting system. This eliminates intermediate transport paths and guide elements, ensuring that pre-lap webs move directly from drafting to calendering without fiber misalignment or damage. The integration resolves the contradiction by maintaining drafting quality while providing a complete device structure.
2Adaptability or versatility
If the pre-lap web travels through multiple guide elements during transport, then the device can handle multiple webs, but the top layer fibers are damaged
Solution Approach 1:
The patent eliminates intermediate guide elements by directly coupling the calendering system to the drafting system. The calendering system receives pre-lap webs directly from the drafting system without requiring transport through additional guide elements, thereby removing the source of fiber damage while maintaining the ability to handle multiple webs through the coordinated operation of multiple drafting systems.
3Speed
If tensile forces are applied during long transport, then the pre-lap web can be moved to the calendering system, but incorrect drafting occurs and uniformity is lost
Solution Approach 1:
By integrating the drafting and calendering systems into a single unit with direct coupling, the patent eliminates the need for long-distance transport of pre-lap webs. The direct connection allows rapid transfer of webs from drafting to calendering without applying significant tensile forces, thereby maintaining fiber layer uniformity and preventing incorrect drafting while achieving efficient web movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The compact device design enhances the quality and uniformity of cotton wraps by reducing fiber misalignment and damage, leading to improved cotton railway formation and subsequent combed yarn quality.
Implementation Method 1
The at least one drafting system (6, 11) is designed to draft the fiber slivers (4) and form a pre-lap web (10, 15)
Implementation Method 2
The calendering system (17) forms the lap web (18) from the pre-lap webs (10, 15) through at least one nip line (32)
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a device for producing a cotton web (18) from a plurality of fiber strips (4). The device comprises a machine frame (30) and at least one drafting unit (6) with an input roller pair (7) and an output roller pair (9), as well as a calender (17) and a winding unit. The at least one drafting unit (6) is designed to stretch the fiber strips (4) and form a pre-cotton web (10). The calender (17) is arranged downstream of the at least one drafting unit (6) to form the cotton web (18). The at least one drafting unit (6), the calender (17), and the winding unit are held in the machine frame (30). A running path (A) provided for the pre-wool track (10) between the output roller pair (9) of the at least one drafting unit (6) and an entry into a clamping line (32) formed in the calendering (17) is 200 mm to 500 mm.