Coaxial Cable Internal Removal Tool Design

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Solution Overview

Problem

Existing methods for ejecting internals from coaxial cables, such as milling or cutting, often result in clogging due to the formation of strands, which are difficult to remove and can deform the cut materials, leading to inefficiencies and potential damage to the cable.

Innovation Solution

A method involving continuous cutting of internals along the longitudinal direction using a dedicated cutting tool, followed by scraping with a separate tool to convert the cut materials into small particles, which can be easily removed, optimizing the tools for their specific purposes and minimizing deformation and clogging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If insulation is milled into strands, then the insulation material can be removed, but the cable is more likely to get clogged and removal becomes difficult

Engineering Contradiction:
Improveinsulation material removalVSAvoidclogging
Core Design Contradiction:
Loss of substanceVSObject-generated harmful factors

Solution Approach 1:

The insulation material is divided into small particles through continuous cutting along the longitudinal direction, rather than forming long strands. This segmentation into fine particles prevents entanglement and clogging while facilitating easy removal through the cable conduit.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The harmful effect of strand formation is eliminated by extracting the cutting action from the removal process. A separate scraping tool is used to remove the pre-cut particles, preventing the cutting tool from creating entangled strands that would cause clogging.

Inventive Principle:
Principle #2Taking out (Extraction)

2Device complexity

If a single tool is used for both cutting and removal in reciprocating movement, then the process can be simplified, but strands become entangled at the rear end causing potential clogging

Engineering Contradiction:
Improvetool configurationVSAvoidstrand entanglement
Core Design Contradiction:
Device complexityVSObject-generated harmful factors

Solution Approach 1:

The combined tool is divided into functionally separate components: a cutting section that continuously cuts insulation into particles, and a scraping section that removes these particles. This segmentation allows each component to perform its specific function optimally without causing strand entanglement.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The harmful strand formation is eliminated by extracting the cutting and removal functions into separate sections of the tool. The cutting section creates particles while the scraping section immediately removes them, preventing entanglement at the rear end that would occur with reciprocating movement.

Inventive Principle:
Principle #2Taking out (Extraction)

3Object-generated harmful factors

If cutting is performed in reciprocating movement over short distances, then strand entanglement is reduced, but the cable is progressed through relatively slowly

Engineering Contradiction:
Improvestrand entanglementVSAvoidcable processing speed
Core Design Contradiction:
Object-generated harmful factorsVSProductivity

Solution Approach 1:

The cutting action is made continuous rather than reciprocating. The cutting tool moves continuously through the cable in one direction, continuously cutting insulation into particles that are simultaneously scraped away. This eliminates the back-and-forth motion that limits progress speed while preventing strand entanglement through continuous particle removal.

Inventive Principle:
Principle #20Continuity of useful action

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

This approach allows for efficient and consistent removal of internals without clogging, saving time and preventing material deformation, enabling the preparation of the cable for new data transmission cores like optical waveguides.

Implementation Method 1

cutting into the internals along a longitudinal direction of the cable by moving a cutting tool in the longitudinal direction through the cable

Methodology Applied
Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

scraping off the internals cut in step a) by moving a scraping tool, different from the cutting tool, in the longitudinal direction through the cable

Methodology Applied
Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentEP4160837A1Method and a set of tools for removing internals from a cable, in particular a coaxial cable
Publication Date: 2023.04.05 CXT INVEST BV
  • EP4160837A1 patent drawingFigure 1A~1B
  • EP4160837A1 patent drawingFigure 2A~2B
  • EP4160837A1 patent drawingFigure 3A~3B

AI summary

The invention relates to a method for ejecting internals from a cable, in particular a coaxial cable, wherein the method comprises the steps of: a) cutting into the internals along a longitudinal direction of the cable by moving a cutting tool in the longitudinal direction through the cable; b) scraping off the internals cut in step a) by moving a scraping tool, different from the cutting tool, in the longitudinal direction through the cable; and c) removing the internals scraped off in step b) in the longitudinal direction from the cable; wherein the cutting in step a) is continuous or substantially continuous from a first end of the cable up to a second end of the cable, opposite to the first end.