Cryogenic Cable Insulation Hardening to Limit Twist Deformation
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Solution Overview
Problem
Existing methods for manufacturing communications cables face challenges in reducing deformation and maintaining electrical performance due to compressive forces during the manufacturing process, leading to increased capacitance, reduced signal velocity, and higher costs from additional insulation required to compensate for deformation.
Innovation Solution
The method involves temporarily altering the hardness of polymer insulation layers by exposing them to a cryogenic fluid before or during compressive events, such as twisting, to reduce deformation and maintain electrical performance without adding extra insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional insulation material is added to compensate for compression deformation, then the cable can maintain electrical performance, but the cable size and manufacturing cost increase
Solution Approach 1:
The patent changes the temperature parameter of the polymer insulation from ambient to cryogenic temperatures, which fundamentally alters the material's hardness and deformation characteristics. This allows the insulation to maintain its shape and electrical performance without requiring additional material thickness.
Solution Approach 2:
The patent applies cryogenic treatment to the polymer insulation before the compression deformation occurs during manufacturing. This preliminary hardening action prevents deformation rather than compensating for it afterward, eliminating the need for extra insulation material.
2Manufacturing precision
If manufacturing line speed is reduced to alleviate compression forces, then polymer deformation decreases, but productivity and equipment utilization decrease
Solution Approach 1:
The patent changes the temperature parameter of the polymer from ambient to cryogenic conditions, which fundamentally alters the material's mechanical properties. This allows high-speed manufacturing to proceed without deformation because the hardened polymer resists compression forces that would normally cause damage at high speeds.
Solution Approach 2:
The patent applies cryogenic hardening to the polymer insulation before it undergoes compression during high-speed manufacturing. This preliminary action creates resistance to the harmful compression forces, allowing the process to proceed at high speed without deformation.
3Strength
If thicker and stiffer jacketing layers are used to compensate for compression, then cable physical strength increases, but cable size and cost increase
Solution Approach 1:
The patent changes the temperature parameter of the jacketing material from ambient to cryogenic temperatures, which dramatically increases the material's hardness and resistance to compression. This allows thin jacketing layers to provide the same protective function that would normally require thick, stiff layers at ambient temperature.
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 effectively reduces deformation, maintains the circular cross-section of conductors, and improves electrical properties by minimizing the crush ratio and maintaining air content within the insulation, thereby enhancing signal transmission and reducing material costs.
Implementation Method 1
exposing the insulation layer to a cryogenic fluid to increase the hardness of the insulation layer
Implementation Method 2
exposing the insulation layer to a cryogenic fluid to increase the hardness of the insulation layer
Data Source
AI summary
A method for manufacturing wire and cable products with a polymer cable component is provided. The method includes increasing the hardness of a polymer cable component in order to reduce compression and deformation of the cable components during manufacturing. In some instances, the hardness is temporarily increased prior to or during the process of creating twisted pair or during the cabling process.