Interchanged Plating on Flat Bed Knitting Technical Face

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Solution Overview

Problem

Conventional flat bed knitting machines produce fabrics with unmatched structural appearances on the technical face and back, failing to meet market requirements for color changes and pattern variations, leading to a loss of appeal for consumers.

Innovation Solution

The method involves using indentations and nose protrusions of sinkers to collaborate with latch needles for staged stitching displacements, allowing for the interchanged plating of different colored yarns on a single face fabric, achieved by a carriage moving reciprocally and linearly above the needle bed, enabling the formation of single face fabrics with varied color changes and patterns solely on the technical face.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional technique is used to produce single face plain stitch fabrics with plating on the technical back, then production time is saved and knitting cost is reduced, but the structural appearance of the plating on the technical face and back is unmatched, causing loss of appeal to consumers

Engineering Contradiction:

Improveproduction timeVSAvoidstructural appearance match

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The invention inverts the conventional approach by forming plating on the technical face instead of the technical back. This is achieved by using a double needle bed structure where the first needle bed forms plating with first and second yarns, and the second needle bed forms corresponding plating that appears on the technical face, thereby matching the structural appearance while maintaining productivity benefits

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The knitting process is segmented into two independent needle beds, each handling specific yarns and stitch formations. The first needle bed handles the base fabric and first yarn plating, while the second needle bed handles the second yarn plating that appears on the technical face, allowing independent control and matching of structural appearances

Inventive Principle:

Principle #1Segmentation

2Ease of manufacture

If conventional technique is used to produce fabrics with plating on the technical back, then knitting operation cost is reduced, but the fabric cannot fully meet consumers' requirements for color changes and pattern variations

Engineering Contradiction:

Improveknitting operation costVSAvoidcolor changes and pattern variations

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The knitting system is divided into two independent needle beds, each capable of handling different yarns and forming different patterns. This segmentation allows the fabric to exhibit color changes and pattern variations on the technical face while maintaining cost-effective knitting operations through standardized machine structures

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The double needle bed structure provides multi-functionality, where each needle bed can independently form different stitch patterns and handle different yarns. This universality enables the fabric to meet diverse consumer requirements for color changes and pattern variations while using a single knitting machine setup

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If conventional technique is used to produce single face plain stitch fabrics with plating on the technical back, then production yield is reduced, but the unmatched structural appearance causes loss of appeal to consumers

Engineering Contradiction:

Improveproduction yieldVSAvoidstructural appearance match

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP3067453B1Method for knitting interchanged plating on single face of technical face for flat bed knitting machines

Publication Date: 2019.08.28 PAI LUNG MACHINERY MILL CO LTD

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AI summary

A method for knitting interchanged plating on a single face of technical face for a flat bed knitting machine (10) which includes at least one needle bed (50) that has a plurality of latch needles (60), a plurality of sinkers (70) and a carriage (20) above the needle bed (50) comprises the steps of: forming an indentation (72) and a nose protrusion (73) at a front end of each sinker (70); controlling the carriage (20) so that the latch needle (60) is moved in a staged stitching displacement (440) which includes at least a first stitching section (441), a second stitching section (442) and a delayed stitching section (443); feeding a first coloration yarn (91) and a second coloration yarn (92) at the same time to the flat bed knitting machine (10); pushing the yarns via the front edge of the nose protrusion (73) while the sinker (70) is at the second stitching section (442) to knit a standard plating (80) and continuing the knitting operation through the standard plating (80) to form a single face fabric; and controlling the carriage (20) to make the latch needle (60) to perform an interchanged stitching displacement (45), and ordering the sinker (70) during the interchanged stitching displacement (45) to pick up the yarns through the junction of the rear edge of the nose protrusion (73) and the indentation (72), then release the yarns to knit an interchanged plating (90).