Warp Knitting Needle Reinforced Transition Section
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Solution Overview
Problem
Warp knitting needles are prone to damage due to high forces exerted by inferior warp threads with imperfections, such as thick, thin, or hard spots, which can lead to premature wear and failure during the production of knitted fabrics, especially in coarse needle pitch machines.
Innovation Solution
A knitting needle design with a reinforced transition section, where the second diameter is at least 1.3 times the first diameter, providing increased material thickness to prevent undesirable bending and ensure a minimum catching space depth, allowing the needle hook to withstand high loads and resist tensile forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the needle hook is made with standard dimensions, then the knitting needle can operate with fine needle pitch and maintain flexibility, but the needle hook becomes vulnerable to damage from high forces exerted by defective warp threads
Solution Approach 1:
The needle hook is designed with non-uniform thickness, featuring a maximally thickened transition section (between stem and end section) while maintaining standard or reduced thickness in other areas. This local reinforcement concentrates material where bending moments are highest during stitch formation, providing enhanced strength against defective warp threads without increasing overall device complexity or affecting needle pitch flexibility.
Solution Approach 2:
The needle hook is divided into distinct sections (stem section, transition section, end section) with different thickness characteristics. The transition section is specifically identified as the critical reinforcement zone, allowing the design to address strength requirements locally while maintaining operational flexibility in other sections.
2Reliability
If the transition section is reinforced with increased material thickness, then the needle can resist bending and withstand high loads, but the manufacturing complexity increases
Solution Approach 1:
The design modifies the geometric parameter of the transition section by increasing its thickness to a maximum value, while other sections maintain standard dimensions. This targeted parameter change enhances reliability by preventing bending in the critical transition zone during high-load operations, while the overall manufacturing process remains comparable to standard needle production.
3Adaptability or versatility
If the catching chamber depth is increased to accommodate laying operations, then the needle can handle various mesh fabric productions, but the needle becomes more prone to bending under load
Solution Approach 1:
The needle design implements local reinforcement at the transition section where bending moments are maximized during catching and laying operations. This allows the catching chamber to maintain sufficient depth for versatile mesh fabric production while the thickened transition section provides the structural support needed to prevent bending under operational loads.
Data Source
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AI summary
The invention relates to a knitting needle (1) for a warp knitting machine with a shank (3) and with a needle hook (2), wherein the needle hook (2) forms a catch chamber (4) for catching a warp thread, wherein the needle hook (2) has a stem section (5) adjoining the shank (3), a transition section (6) adjoining the stem section (5), and an end section (7) adjoining the transition section (6), wherein a first interface between the shank (3) and the stem section (5) of the needle hook (2) lies in a first plane (8), wherein a second interface between the stem section (5) of the needle hook (2) and the transition section (6) of the needle hook (2) lies in a second plane (9), and wherein a third interface between the transition section (6) of the needle hook (2) and the end section (7) of the needle hook (2) lies in the second plane (9).wherein the first plane (8) is oriented perpendicular to a longitudinal axis (10) of the knitting needle (1) and is tangent to the end section (7), and wherein the second plane (9) is oriented perpendicular to the longitudinal axis (10) of the knitting needle (1) and is tangent to a profile curve (11) which, in a profile view of the knitting needle (1), runs between the catch chamber (4) and the needle hook (2). According to the invention, the end section (7) has a first diameter (13) which forms a maximum diameter of the end section (7), the transition section (6) has a second diameter (14) which forms a minimum diameter of the transition section (6), and the second diameter (14) is at least 1.3 times larger than the first diameter (13). The invention further relates to a method for producing a net fabric using a warp knitting machine. According to the invention, the method is designed such thatthat knitting needles (1) according to the invention are used for stitch formation in the warp knitting machine.