Papermaking Felt Spirally Wound Base Fabric Uniformity
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Solution Overview
Problem
Existing papermaking felt production methods using spirally wound band-shaped bodies often result in nonuniformity in water squeezing capability, smoothness, and running stability due to variations in length dimension and mass per unit area, leading to potential waving and abnormal running performance.
Innovation Solution
A papermaking felt with a base fabric layer formed by spirally winding a band-shaped body, where the side edges are joined together with marks at regular intervals in the warp direction to ensure uniform length dimension, combined with a batt layer for improved water squeezing, smoothness, and running stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a band-shaped body is spirally wound to form the base fabric layer, then productivity is improved, but nonuniformity in length dimension and mass per unit area occurs
Solution Approach 1:
The band-shaped body is pre-marked with marks at regular intervals before spirally winding. These marks serve as alignment references during the winding process, ensuring that the wound portions are joined at consistent positions. This preliminary marking action prevents nonuniformity in length dimension and mass per unit area while maintaining high productivity through efficient spirally wound construction.
2Device complexity
If the band-shaped body is spirally wound without marks, then manufacturing complexity is reduced, but nonuniformity in water squeezing capability and smoothness occurs
Solution Approach 1:
Marks are pre-positioned on the band-shaped body at regular intervals before the spirally winding process. These marks provide simple visual guides for alignment during winding, adding minimal complexity to the manufacturing process while ensuring uniform length dimension and consistent mass distribution. This uniformity directly improves water squeezing capability and smoothness reliability.
3Stability of the object's composition
If marks are arranged at regular intervals in the warp direction, then running stability is improved, but manufacturing precision requirements increase
Solution Approach 1:
Marks are arranged at regular intervals in the warp direction of the band-shaped body before winding. During the spirally winding process, these pre-positioned marks serve as alignment references that guide the joining of wound portions. This approach improves running stability by ensuring consistent edge alignment and uniform structure, while the regular spacing of marks makes alignment more straightforward and less demanding of precision.
Data Source
AI summary
There is provided a papermaking felt comprising a base fabric layer and at least one batt layer integrated with the base fabric layer,wherein the base fabric comprises at least one layer formed by spirally winding a band-shaped body having a width smaller than a width of the papermaking felt and having a plurality of ground warp yarns, a plurality of ground weft yarns, a first side edge, and a second side edge in such a manner that the first side edge and the second side edge are adjacent and thereby joining the side edges together; anda plurality of marks is arranged at regular intervals in a warp direction of the band-shaped body.