Modular Inductive Heating Coil for Cable Extrusion
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Solution Overview
Problem
Existing inductive heating arrangements for electrical cables are cumbersome, requiring separate equipment and complicating maintenance due to integrated coil and protective field elements, which are heavy, expensive, and difficult to clean and maintain, and necessitate removal of additional devices like X-ray measuring devices for access during production changes or maintenance.
Innovation Solution
A modular inductive heating arrangement featuring a coil as induction means downstream of the extrusion head and ferrite cores in a splice box as guide means to direct the magnetic field, preventing heating of external parts and allowing easy coil replacement during production stops, thus simplifying maintenance and improving ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inductive post-heating equipment is integrated into the extrusion line, then heating efficiency is improved, but maintenance complexity increases and requires removal of additional equipment
Solution Approach 1:
The inductive post-heating equipment is divided into modular components: a coil assembly that can be independently removed and a splice box that remains fixed. This segmentation allows the coil to be maintained or replaced without removing the splice box or other line equipment, resolving the contradiction between integrated heating efficiency and maintenance complexity.
2Device complexity
If coil and protective field guiding elements are combined in the same construction, then structural integration is improved, but weight increases and cleaning difficulty increases
Solution Approach 1:
The coil is extracted as a separate removable component from the splice box structure. The protective field guiding elements remain integrated into the splice box, while the coil can be independently handled, weighed less during operation, and easily cleaned or replaced without moving heavy integrated structures.
3Productivity
If additional equipment is added to the extrusion line for inductive heating, then heating capability is improved, but access for maintenance requires removal of other devices
Solution Approach 1:
The coil assembly is designed as a segmented, independently removable unit from the splice box. This allows maintenance personnel to access and service the coil by simply removing it from the splice box without needing to remove X-ray measuring devices or other line equipment, improving ease of operation while maintaining heating capability.
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 modular approach enhances maintenance efficiency, reduces equipment complexity, and prevents overheating of external components, facilitating easier production line adjustments and improved post-heating of electrical conductors for efficient crosslinking of insulation layers.
Implementation Method 1
creating a magnetic field by induction means
Implementation Method 2
inductively heating the electrical conductor
Implementation Method 3
directing the magnetic field created with the induction means by guide means provided in a splice box
Data Source
AI summary
The invention relates to an arrangement for inductively heating an electrical conductor after the extrusion head in a process of manufacturing electrical cables (8) having insulation layer on the electrical conductor. The arrangement comprises a first distinctive part having induction means (5), and a second distinctive part having guide means (4) and provided in a splice box (3) for directing the magnetic field created with the induction means (5) to protect external parts from heating.