Cable Shielding Foil Removal Using Controlled Rotary Perforation
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Solution Overview
Problem
The manual removal of shielding foils from electrical cables is inefficient and non-reproducible, often causing damage to the underlying metallic shielding braid, and existing automated methods do not consistently achieve satisfactory results.
Innovation Solution
A method involving a rotary stripping machine that creates a predetermined breaking point in the shielding foil by pressing a radially adjustable perforation tool through an incision in the insulating sheath, allowing for controlled tearing of the foil without damaging the metallic braid, and a device with adjustable toothed belt wheels for precise positioning and cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual removal of shielding foil is used, then flexibility and simplicity are maintained, but processing efficiency and consistency deteriorate
Solution Approach 1:
The shielding foil removal process is segmented into distinct phases: first creating a controlled incision in the insulating sheath, then forming a breaking point in the shielding foil, and finally enabling clean separation. This segmentation transforms the complex manual task into automated, manageable steps that maintain precision while improving efficiency.
Solution Approach 2:
The method performs preliminary actions by first creating an incision in the insulating sheath and then forming a predetermined breaking point in the shielding foil before actual removal. These preparatory steps ensure that the subsequent foil removal occurs at a controlled location, guaranteeing consistency and preventing damage to underlying structures.
2Extent of automation
If rotary cutting of shielding foil is used, then automation is achieved, but damage to metallic shielding braid increases
Solution Approach 1:
The method applies local quality by concentrating the cutting action only at the predetermined breaking point where the shielding foil needs to be separated. The incision in the insulating sheath is made at a specific location, and the breaking point is formed only where needed, leaving the rest of the metallic shielding braid untouched and undamaged.
Solution Approach 2:
The insulating sheath incision serves as an intermediary element that facilitates the removal process. By creating an incision in the insulating sheath first, the method provides a controlled pathway that guides the formation of the breaking point in the shielding foil, enabling precise separation without direct contact between cutting tools and the metallic braid.
3Ease of manufacture
If thermal treatment of shielding foil is used, then removal assistance is provided, but result consistency deteriorates
Solution Approach 1:
The method replaces thermal treatment with a purely mechanical approach. Instead of using heat to assist foil removal, the invention uses controlled mechanical incision and breaking point formation. This substitution eliminates the variability inherent in thermal processes while maintaining effective removal assistance through precise mechanical action at the predetermined breaking point.
Data Source
AI summary
A method for removing a shielding foil of an electrical cable includes creating an incision of a first depth in an insulating sheath of the electrical cable wherein the first depth is smaller than or the same as the thickness of the insulating sheath; creating a predetermined breaking point in the shielding foil through at least one radially adjustable perforation tool until the perforation tool has reached a second depth, wherein the second depth corresponds to at least the thickness of the insulating sheath plus at least half of the thickness of the shielding foil; tearing the shielding foil at the predetermined breaking point; and removing the shielding foil.