Pneumatic Fiber Feeding for Non-Woven Web Uniformity
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Solution Overview
Problem
Existing machines for forming non-woven air-laid webs suffer from non-uniform deposition of fibers on the condenser, leading to costly additional processing steps and inefficiencies.
Innovation Solution
Modifications to the machine design, including the removal or modification of the doffer plate and lower slide plate, addition of a nose bar and nose bar extension, and incorporation of air venting passages, to improve fiber deposition uniformity on the condenser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the machine uses a traditional doffer plate and lower slide plate configuration, then the fiber doffing process is simple, but the fiber deposition on the condenser becomes non-uniform
Solution Approach 1:
The patent removes the doffer plate and lower slide plate from the traditional machine configuration to eliminate the problem of fiber clumping and non-uniform deposition. By extracting these problematic components, the fiber doffing process is simplified and deposition uniformity is improved.
Solution Approach 2:
Instead of using plates to guide and constrain fiber flow as in traditional designs, the patent inverts the approach by using open空间的 doffing zones where fibers are allowed to enter the air stream more freely, achieving better deposition uniformity through the opposite design philosophy.
2Manufacturing precision
If additional processing steps are added to correct non-uniform deposition, then deposition uniformity improves, but processing costs and time increase
Solution Approach 1:
The patent implements preliminary action by designing the doffing mechanism to achieve uniform fiber deposition directly at the source, preventing the need for subsequent corrective processing steps. The modified doffing configuration ensures fibers are evenly distributed before they reach the condenser, eliminating the requirement for post-deposition uniformity corrections.
3Manufacturing precision
If the doffer plate and lower slide plate are removed or modified, then fiber deposition uniformity improves, but the machine structure becomes more complex
Solution Approach 1:
The patent removes the doffer plate and lower slide plate to eliminate the root cause of non-uniform deposition. This extraction of problematic components simplifies the overall structure while improving deposition quality, as the removed plates were creating fiber clumping issues.
Solution Approach 2:
The patent modifies geometric parameters of the remaining structure, such as adjusting the position and configuration of the nose bar and air supply components, to compensate for the removed plates and achieve optimal fiber deposition uniformity without adding complex new structures.
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
Achieves more uniform fiber deposition on the condenser, reducing the need for additional processing steps and lowering costs.
Implementation Method 1
The lickerin 12 then doffs the combed fibers therefrom using centrifugal force
Implementation Method 2
The doffed fibers are carried entrained in the air supply AS to a condenser 18
Implementation Method 3
The fibers are deposited on the condenser 18 in a random fashion to form the non-woven fiber web
Data Source
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AI summary
Methods apparatuses and systems of forming a random fiber web using pneumatic fiber feeding system are disclosed. In one embodiment, a method can optionally comprise: providing a plurality of moveable apparatuses including a lickerin and a feeder, the lickerin configured to remove a plurality of fibers from a fibrous mat delivered to adjacent the lickerin by the feeder; doffing the plurality of fibers from the lickerin at a doffing location within the system; communicating an air supply to entrain the plurality of fibers with the air supply after the doffing; and collecting the plurality of fibers from the air supply to form the random fiber web.