Hosiery Stitching Reed Tooth Slide Groove Friction Reduction
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Solution Overview
Problem
The existing hosiery stitching machines face issues with loop damage due to frictional contact between the male reed teeth and the loops during transfer and stitching operations, leading to instability and rough execution of these processes.
Innovation Solution
A reed tooth design with a U-shaped leg rod and tapered sidewalls that includes a slide groove for smooth sliding of transfer members, reducing friction and enhancing stability, allowing for efficient loop transfer and stitching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If male reed teeth are provided with guide holes for sewing needle guidance, then stitching operation can be achieved, but cross sectional area increases and frictional contact with loops occurs causing loop damage
Solution Approach 1:
The guide hole is removed from the reed tooth structure. Instead, a separate guide member with a guide hole is provided that works in conjunction with the reed tooth. This extraction eliminates the frictional contact problem between the reed tooth and loop while maintaining the stitching function through the separate guide member.
Solution Approach 2:
A separate guide member is introduced as an intermediary element between the reed tooth and the sewing needle. This guide member contains the guide hole for needle guidance, while the reed tooth itself remains free of holes and direct contact with loops, thus preventing loop damage while enabling stitching operation.
2Productivity
If transfer members are moved upward toward reed teeth for loop transfer, then loop transfer operation can be achieved, but frictional contact occurs between reed teeth and loops causing loop damage
Solution Approach 1:
The guide hole is extracted from the reed tooth structure. The reed tooth now consists only of the leg rod portion that interfaces with the loop, while the guide hole function is transferred to a separate guide member. This eliminates the source of frictional damage during loop transfer operations.
3Ease of operation
If reed teeth have large cross sectional area due to guide holes, then stitching function is enabled, but component stability decreases
Solution Approach 1:
The guide hole is extracted from the reed tooth, allowing the reed tooth to have a smaller, more stable cross-sectional area. The stitching function is maintained through the separate guide member that provides the guide hole, thus preserving component stability while enabling stitching.
Solution Approach 2:
The stitching function is segmented into two separate components: the reed tooth (leg rod) that provides structural stability and the separate guide member that provides the guide hole for stitching. This segmentation allows each component to be optimized for its specific function without compromising the other.
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 reed tooth design ensures high component stability and smooth stitching operations by minimizing friction and facilitating easy connection with transfer members, effectively closing the toe end of hosiery items without damaging the loops.
Implementation Method 1
the first sidewall has a tapered bottom end that is opposite to the positioning portion and that includes a bottommost tip, and an inclined edge extending upwardly from the bottommost tip and extending gradually away from the intermediate wall. The second sidewall has a length shorter than that of the first sidewall, and has a tapered bottom end that includes a bottommost end which is higher than the bottommost tip of the first sidewall
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A reed tooth (10) for a hosiery stitching machine (100), which includes a fixed reed (110), includes a positioning portion (11) for positioning to the fixed reed (110), first and second sidewalls (13, 14), and an intermediate wall (15) cooperating with the first and second sidewalls (13, 14) to define a slide groove (16). The first sidewall (13) has a tapered bottom end (121) that includes a bottommost tip (122) and an inclined edge (123). The second sidewall (14) has a length shorter than that of the first sidewall (13), and has a tapered bottom end (140) that includes a bottommost end (141), and an inclined edge (142) that extends upwardly from the bottommost end (141) of the second sidewall (14). The inclined edge (142) of the second sidewall (14) and the inclined edge (123) of the first sidewall (13) cooperatively define a bottom opening (163) of the slide groove (16).