Cable Core Groove Modification for Tire Adhesion

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Solution Overview

Problem

The existing adhesive mediators used in tire production to enhance the adhesion between cable cores and rubber materials are often harmful to health and the environment, and they do not consistently achieve sufficient composite strength.

Innovation Solution

The process involves modifying cable cores by placing non-metallic reinforcement strips, such as coated fibers or rubber strips with a vulcanizable rubber mix, into the grooves on the surface of the cable cores, eliminating the need for harmful adhesives.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If adhesion promoters are used to enhance bond strength between cable core and rubber material, then adhesion is improved, but health and environmental safety deteriorates

Engineering Contradiction:

Improvebond strengthVSAvoidhealth and environmental safety

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The invention extracts and eliminates the harmful adhesion promoters from the system by using a mechanical surface modification approach instead. The cable core surface is treated with abrasive materials during manufacturing to create a roughened surface that provides mechanical interlocking with the rubber compound, thereby achieving strong adhesion without any harmful chemical substances.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention replaces the chemical adhesion mechanism (using adhesion promoters) with a mechanical adhesion mechanism. The surface roughening is achieved through mechanical abrasion during cable core manufacturing, creating a physical structure that mechanically interlocks with the rubber compound, thus substituting chemical bonding with mechanical bonding.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Strength

If conventional coatings are applied to cable cores to improve adhesion, then bond strength is enhanced, but manufacturing complexity increases

Engineering Contradiction:

Improvebond strengthVSAvoidmanufacturing process complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The invention merges the adhesion enhancement function into the cable core manufacturing process itself. The surface roughening treatment is integrated into the existing manufacturing line, combining multiple functions (cable core formation and surface treatment) into a single integrated process, thereby avoiding additional manufacturing steps and reducing overall process complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention performs the surface roughening treatment during the cable core manufacturing process, before the rubber compound is applied. This preliminary action prepares the surface in advance, eliminating the need for separate coating or treatment steps that would increase manufacturing complexity.

Inventive Principle:

Principle #10Preliminary action

3Strength

If adhesion promoters are used to achieve sufficient composite strength, then bond strength is improved, but environmental pollution increases

Engineering Contradiction:

Improvecomposite strengthVSAvoidenvironmental pollution

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The invention converts the potentially harmful chemical approach into a beneficial mechanical approach. By using mechanical surface roughening instead of chemical adhesion promoters, the invention transforms a harmful substance-based solution into a clean, environmentally friendly mechanical solution that achieves the same adhesion goal without pollution.

Inventive Principle:

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

Solution Approach 2:

The cable core surface treatment is achieved through self-service during the manufacturing process itself, without requiring external chemical agents. The mechanical abrasion process is inherently part of the manufacturing sequence, allowing the system to prepare its own surface for optimal adhesion without introducing harmful substances into the environment.

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP4159425B1Method for modifying the cable core for the manufacture of tyres and cable core

Publication Date: 2025.05.07 CONTINENTAL REIFEN DEUTSCHLAND GMBH

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AI summary

The invention relates to a method for modifying a cable core, in particular for use in tire manufacturing, comprising the following process steps: v1) manufacturing or providing a cable core comprising a core filament (12) and at least one filament layer arranged around the core filament, comprising a plurality of outer filaments (14), wherein the surface of the cable core has a plurality of grooves formed by the outer filaments of the outermost filament layer, v2) manufacturing or providing one or more non-metallic reinforcing strips (18), and v3) arranging the one or more non-metallic reinforcing strips in one or more of the grooves of the surface of the cable core to obtain a modified cable core.The invention further relates to a modified cable core, a rubber product with the modified cable core and the use of non-metallic reinforcing strips (18) to improve the adhesion of rubber materials to a cable core.