Woven Fabric Connection Using Transmission Welding
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Solution Overview
Problem
Existing woven fabric connections for clothing in paper machines are prone to unpredictable post-welding properties, reduced tensile strength, and are fracturable, particularly in the machine direction, which affects the quality and durability of the fabric.
Innovation Solution
A woven fabric connection using transmission welding with connecting elements that have a larger diameter than the transverse threads, extending across multiple longitudinal thread ends, and configured to absorb specific wavelengths of light for efficient welding, ensuring minimal disruption to the fabric's properties and structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ultrasonic weld seam is used to connect two ends of woven fabric belt, then the connection is achieved, but the tensile strength and durability of the fabric are reduced
Solution Approach 1:
The connecting element is divided into multiple longitudinal strands (at least two) that are arranged parallel to each other. Each strand independently contacts and is connected to longitudinal thread ends, distributing the mechanical load and preventing stress concentration that would occur with a single solid connecting element.
Solution Approach 2:
The connecting element comprises at least two different materials: a first material forming the longitudinal strands that contacts the fabric threads, and a second material forming the transverse connecting portion. This composite structure combines the adhesive benefits of material bonding with the mechanical strength of the multi-strand configuration.
2Ease of manufacture
If welded connection is used to connect woven fabric ends, then the connection is achieved, but the fabric becomes fracturable and post-welding properties become unpredictable
Solution Approach 1:
The connecting element is divided into multiple longitudinal strands (at least two) that are arranged parallel to each other. Each strand independently contacts and is connected to longitudinal thread ends, distributing the mechanical load and preventing stress concentration that would occur with a single solid connecting element.
Solution Approach 2:
The diameter of the connecting element is controlled to be between 0.5-5 mm, and the number of longitudinal strands is optimized (at least two). These parameter changes ensure adequate contact surface for reliable connection while maintaining the flexibility and durability of the woven fabric structure.
3Stability of the object's composition
If connecting element with small diameter is used, then the fabric structure is maintained, but the connection strength is insufficient
Solution Approach 1:
The connecting element is divided into multiple longitudinal strands (at least two) that are arranged parallel to each other. Each strand independently contacts and is connected to longitudinal thread ends, distributing the mechanical load and preventing stress concentration that would occur with a single solid connecting element.
Solution Approach 2:
The connecting element comprises at least two different materials: a first material forming the longitudinal strands that contacts the fabric threads, and a second material forming the transverse connecting portion. This composite structure combines the adhesive benefits of material bonding with the mechanical strength of the multi-strand configuration.
4Strength
If connecting element with large diameter is used, then the connection strength is increased, but the fabric thickness variation and marks increase
Solution Approach 1:
The connecting element is divided into multiple longitudinal strands (at least two) that are arranged parallel to each other. Each strand independently contacts and is connected to longitudinal thread ends, distributing the mechanical load and preventing stress concentration that would occur with a single solid connecting element.
Solution Approach 2:
The diameter of the connecting element is controlled to be between 0.5-5 mm, and the number of longitudinal strands is optimized (at least two). These parameter changes ensure adequate contact surface for reliable connection while maintaining the flexibility and durability of the woven fabric structure.
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
The solution provides a strong, flexible, and durable woven fabric connection with minimal thickness variation, enhancing the tensile strength and permeability of the fabric, while reducing the risk of marks and wear, thus improving the overall quality and performance of the clothing in paper machines.
Implementation Method 1
the connecting elements are embodied so as to absorb light of a wavelength in the range between 780 μm and 1200 μm
Implementation Method 2
the first longitudinal thread ends and the second longitudinal thread ends are in contact exclusively with the upper side of the connecting element and are connected in a materially integral manner, in particular welded, to said upper side
Data Source
AI summary
A web connection for a fabric of a machine for producing or processing a fibrous material web includes a first web end with first longitudinal thread ends, a second web end with second longitudinal thread ends, and at least one connection element which extends in the transverse direction of the resultant fabric. The connection element has an upper face and a lower face, and the first longitudinal thread ends and the second longitudinal thread ends solely contact and bond to the upper face of the connection element, in particular the thread ends are welded thereto. The fabric with a paper side and a running side. The fabric has at least one first web layer with at least one such web connection which is arranged such that the lower face of the at least one connection element is oriented in the direction of the running side of the fabric.