Combing Machine Drafting System for High-Output Sliver Processing
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Solution Overview
Problem
Current combing machines with multiple heads face productivity limitations due to the need for additional machines and space, and existing solutions fail to integrate seamlessly into spinning lines, leading to increased sliver weight and processing challenges.
Innovation Solution
A combing machine with more than eight combing heads, where each head is fed from cans, with combed fibers combined into separate slivers and transported to a drafting system, utilizing a wider drafting system and additional predraft zones to manage increased sliver mass, and incorporating guide elements or an inlet funnel to optimize fiber quality and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of combing heads is increased to more than eight, then productivity is improved, but the fiber strip mass increases beyond the processing capacity of conventional drafting units
Solution Approach 1:
The drafting process is segmented into multiple independent drafting units, each handling a portion of the total fiber strip mass. This allows the system to process higher productivity output from multiple combing heads without overloading a single drafting unit, resolving the contradiction between increased productivity and manageable fiber strip mass.
Solution Approach 2:
The patent transitions from a single-line drafting approach to a multi-line parallel drafting architecture. By distributing fiber strips across multiple drafting units operating in parallel, the system accommodates increased fiber strip mass from more than eight combing heads while maintaining quality standards.
2Productivity
If a wider drafting unit is used to handle increased strip mass, then productivity is improved, but the deflection in the center of drafting unit rollers increases and affects fiber quality
Solution Approach 1:
Instead of using one wide drafting unit that would suffer from center deflection, the system segments the drafting function into multiple narrower drafting units. Each unit maintains adequate roller support and minimal deflection, preserving fiber quality while collectively handling the increased strip mass from multiple combing heads.
Solution Approach 2:
Multiple drafting units are combined in parallel to achieve the total processing capacity needed for more than eight combing heads. This merging approach allows each individual unit to maintain optimal dimensions for quality processing while the collective system handles high productivity volumes.
3Area of stationary object
If conventional winding machines are replaced with can feeding systems, then space and investment requirements are reduced, but the cans have limited capacity and must be changed very frequently
Solution Approach 1:
The can feeding system is designed with universal compatibility and efficient changeover mechanisms, allowing rapid replacement and reuse of cans. The system maintains multi-functionality to handle different can types and sizes, reducing the operational impact of frequent can changes while keeping space requirements low.
Solution Approach 2:
The can feeding system incorporates self-service features such as automatic can detection, positioning, and changeover mechanisms that minimize manual intervention and downtime. This reduces the time loss associated with frequent can changes while maintaining the space-efficient can-based feeding approach.
4Adaptability or versatility
If the combing machine produces fiber slivers with density of 5 to 10 ktex, then compatibility with downstream machines is maintained, but the fiber slivers are significantly heavier and require extensive adjustments to processing systems
Solution Approach 1:
The drafting units are designed with adjustable parameters including roller speeds, tensions, and configurations that can be optimized for the specific sliver density range of 5 to 10 ktex. This allows the system to produce compatible slivers for downstream machines while managing the complexity of processing heavier fiber slivers through controlled parameter adjustments.
Data Source
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AI summary
The invention relates to a combing machine (1) comprising more than eight combing heads, wherein each combing head is designed to be fed by means of at least one lap or by means of at least one sliver from cans, wherein the combed fibres are combined to form a separate sliver per combing head and are transported to a finish table (5), supplied to a draw frame (10), and drawn out to form a sliver and placed in a can. According to the invention, the draw frame (10) has a working width, on the nip line of the main draft, of more than 180 mm, preferably at least 200 mm.