Forming Fabric Tape Weave for Reduced Hydraulic Marking
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Solution Overview
Problem
Existing fabric tapes used in fiber web production exhibit undesirable visible hydraulic markings due to insufficient flatness of the upper fabric layer, which is exacerbated by single bindings causing depressions.
Innovation Solution
A forming fabric tape design with an upper and lower fabric layer connected by binding threads forming multiple bindings, specifically double and triple bindings, in a pattern repeat of six longitudinal thread supergroups, ensuring a plain weave with alternating binding threads to support the upper fabric layer and reduce depressions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single bindings are used to connect upper and lower fabric layers, then the structure is simpler, but the upper fabric layer develops depressions causing visible hydraulic markings
Solution Approach 1:
The patent changes the binding parameter from single bindings to multiple bindings (double and triple bindings), transforming the connection structure to eliminate depressions while maintaining manageable complexity
Solution Approach 2:
The patent creates a composite binding structure combining multiple binding threads (B1, B2) working together in alternating patterns, where the composite action of multiple bindings prevents the harmful depressions that single bindings cause
2Shape
If multiple bindings with alternating binding threads are used, then the flatness and stability of the upper fabric layer is improved, but the device complexity increases
Solution Approach 1:
The patent segments the binding function into multiple independent binding threads (B1, B2) that work in alternating patterns, allowing each thread to form multiple bindings without requiring a completely complex new structure
Solution Approach 2:
The patent implements periodic action through alternating binding threads that follow a repeating pattern of double and triple bindings, creating regular flatness without excessive complexity through the cyclic nature of the weave
3Object-affected harmful factors
If binding threads form multiple bindings with upper longitudinal threads, then depressions are reduced, but the thickness of the fabric tape increases
Solution Approach 1:
The patent optimizes the binding parameters by carefully selecting which upper longitudinal threads receive multiple bindings, balancing the depression-reduction benefit against the thickness increase from additional binding layers
Data Source
AI summary
A forming fabric tape for a machine for producing or processing a fiber web, the forming fabric tape including an upper fabric layer including upper longitudinal threads and upper transversal threads woven with the upper longitudinal threads; and a lower fabric layer including lower longitudinal threads and lower transversal threads woven with the lower longitudinal threads, wherein the upper fabric layer and the lower fabric layer are arranged above one another so that the upper fabric layer is oriented towards the fiber material web and the lower fabric layer is oriented away from the fiber web, wherein the upper fabric layer is connected with the lower fabric layer by binding threads (B1-B2) running in a transversal direction of the fabric tape, wherein a weaving pattern of the forming fabric tape is repeated in pattern repeats, wherein the pattern repeats are formed from plural longitudinal thread supergroups.