Oscillating Folding Drawing Unit for Spinning-Knitting Machines
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Solution Overview
Problem
Existing spinning-knitting machines face challenges with high structural complexity and laborious handling in folding-drawing units, which affect processing efficiency and patterning possibilities, while also requiring significant energy and complexity to achieve high structural density.
Innovation Solution
A folding-drawing unit with two working locations, featuring oscillatingly mounted frames with rollers, pressure arms, and reversing rails, allowing for easy operation and accessibility, with a configuration that includes four pairs of rollers creating three draft zones and using common drive elements to reduce complexity and energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If folding-drawing units are used to achieve high structural density and fine yarn counts, then manufacturing precision and productivity are improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The drawing unit is divided into multiple independent drafting sections (first drafting section with first and second rollers, second drafting section with third and fourth rollers). Each section can be independently adjusted and maintained, reducing overall system complexity while achieving fine yarn counts through cumulative drafting effect.
Solution Approach 2:
The patent employs oscillatingly mounted frames that allow dynamic adjustment of roller positions and angles. This dynamic capability enables the complex folding-drawing unit to adapt to different yarn counts and maintain ease of operation through programmable control of oscillation parameters.
2Productivity
If folding-drawing units with multiple rollers are used to achieve high structural density, then productivity is improved, but ease of operation and accessibility deteriorate
Solution Approach 1:
The oscillatingly mounted frames serve multiple functions: they position the rollers, enable dynamic angle adjustment, and provide access to internal components during operation. This multi-functionality maintains ease of operation while achieving high productivity through continuous oscillating motion that prevents yarn entanglement.
Solution Approach 2:
The oscillating motion adds a temporal dimension to the otherwise static roller arrangement. By oscillating the frames, the patent transforms a potentially cumbersome multi-roller system into an easily operable unit where the oscillation automatically manages yarn flow through all four rollers, improving both productivity and ease of operation.
3Device complexity
If common drive elements are used to reduce complexity and energy use, then device complexity and energy consumption are reduced, but manufacturing precision may deteriorate
Solution Approach 1:
The oscillatingly mounted frames introduce dynamic control that compensates for the simplicity of common drive elements. By varying the oscillation amplitude and frequency of different frames, the system maintains precise draft control even with shared drive mechanisms, preventing deterioration of manufacturing precision.
Solution Approach 2:
The patent controls drafting precision by changing the oscillation parameters (amplitude, frequency, phase) of the mounted frames rather than relying solely on drive element ratios. This parameter-based control allows common drive elements to achieve precise manufacturing results through dynamic adjustment of motion characteristics.
Data Source
AI summary
The invention relates to a folding-drawing unit for a spinning-knitting device with two working locations comprising in succession:two pressure arms (10), which respectively have an oscillatingly mounted frame (10.1) in a preliminary draft zone, the oscillatingly mounted frame (10.1) carrying two rollers (W1, W2),a long pressure arm (12) with an oscillatingly mounted roller W3 of a third pair of rollers (WIII/W3) and a lower reversing rail (4.1) of a pair of reversing rails (4, 4.1) anda short pressure arm (15) with an oscillatingly mounted roller (W4) of a pair of delivery rollers (WIV, W4).