Chromium-Coated ABS Textile Components for Wear Reduction

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Solution Overview

Problem

Textile machine components in contact with threads, particularly those producing cross-wound bobbins, face significant wear due to abrasive effects and high-speed thread interaction, leading to material degradation and increased costs, with existing solutions like ceramic or glass materials being expensive or complex to manufacture.

Innovation Solution

A component made partially of plastic material with a chromium coating, specifically designed for thread-contacting areas to reduce friction and wear, allowing for cost-effective production and easy replacement of worn parts, utilizing acrylonitrile-butadiene-styrene copolymer (ABS) with chrome plating for enhanced wear resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If ceramic or glass materials are used for thread-contacting components, then wear resistance is improved, but manufacturing cost and complexity increase

Engineering Contradiction:

Improvewear resistanceVSAvoidmanufacturing cost and complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent uses a composite structure combining plastic base material with chromium coating. The plastic provides cost-effective manufacturing and adequate mechanical properties, while the chromium coating delivers the wear resistance previously only achievable with ceramic or glass materials. This composite approach resolves the contradiction by integrating the advantages of both material types.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the surface parameters of the plastic component by applying a chromium coating. This surface modification transforms the component's wear characteristics without changing the bulk material properties, allowing plastic to achieve ceramic-like wear resistance at lower manufacturing cost and complexity.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If plastic material is used for thread-contacting components, then manufacturing cost is reduced, but wear resistance deteriorates

Engineering Contradiction:

Improvemanufacturing costVSAvoidwear resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent creates a composite structure where plastic material serves as the cost-effective base while chromium coating provides the wear-resistant surface. This allows the component to maintain low manufacturing cost associated with plastic while achieving the wear resistance of metal coatings, resolving the contradiction between cost and durability.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The chromium coating is applied specifically to the surfaces that contact the thread, providing localized wear resistance where it is most needed. The bulk plastic material maintains its cost advantages, creating a component that is cost-effective overall while having enhanced wear resistance at the critical contact surfaces.

Inventive Principle:

Principle #3Local quality

3Reliability

If chromium coating is applied to plastic surfaces, then friction is reduced, but heat dissipation capability worsens due to plastic's low thermal conductivity

Engineering Contradiction:

Improvefriction reductionVSAvoidheat dissipation

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent accepts the limited heat dissipation capability of plastic as an inherent property and works within this constraint. The chromium coating's primary benefit of reduced friction directly translates to reduced heat generation through friction, compensating for the material's low thermal conductivity. The system converts the friction-heat relationship into a benefit where lower friction offsets poor heat dissipation.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 chromium-coated plastic components exhibit reduced wear and heat generation, improving durability and preventing thread catching, while maintaining cost-effectiveness and ease of maintenance, particularly in temporary contact areas like suction nozzles and pipes.

Implementation Method 1

a particularly smooth surface can be provided by a chromium coating on the plastic surface, which considerably reduces the friction of the thread on the surface of the component

Methodology Applied

Scientific EffectFriction reduction: Friction

Implementation Method 2

the chromium coating on the plastic surface, which considerably reduces the friction of the thread on the surface of the component

Methodology Applied

Scientific EffectSurface smoothness:

Data Source

PatentEP3401424B1Thread-touching component of a textile machine for creating cross-wound spools

Publication Date: 2021.09.01 MASCHINENFABRIK RIETER AG

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AI summary

The present invention relates to a thread-contacting component of a cross-coil-producing textile machine (1), wherein the component consists at least partially of a plastic material and is provided with a chrome coating, wherein the component has at least one insert (19) which consists of a plastic material and is provided with a chrome coating.