Thermal Transfer Printing on Insulated Round Wires
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Solution Overview
Problem
Conventional printing techniques struggle to efficiently mark insulated round wires due to their roundness, requiring complex constructions and handling for direct printing, and existing methods often use additional objects for labeling which are cumbersome.
Innovation Solution
A printing device that uses an intermediate carrier, such as a retransfer band, printed with a thermal printer, which is then transferred onto the wire using mold halves with grooves matching the wire diameter, allowing for flexible and direct marking on the wire surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional printing techniques are used on insulated round wires, then direct printing on wire surface is achieved, but the device complexity increases due to roundness of wire surface requiring complex constructions and handling
Solution Approach 1:
The patent introduces an intermediate carrier (flexible printing plate) as a mediator between the flat printing surface and the round wire surface. The printing plate is wrapped around the wire to conform to its curvature, enabling conventional flat printing techniques to work on cylindrical surfaces without requiring complex specialized printing mechanisms.
Solution Approach 2:
The patent adapts the printing surface to match the curvature of the wire by using a flexible printing plate that can be wrapped around the round wire. This allows the printing surface to conform to the cylindrical geometry of the wire, enabling direct printing on the curved surface while maintaining simplicity of the printing mechanism.
2Ease of manufacture
If embossing wheels with preformed letters are used, then direct printing on wire surface is achieved, but the ease of operation decreases due to complex mechanical setting of each individual embossing wheel
Solution Approach 1:
The flexible printing plate serves as an intermediary that carries pre-formed characters or text. Instead of mechanically setting individual embossing wheels, the printed plate is simply wrapped around the wire and secured, dramatically simplifying the operation while maintaining direct printing capability on the wire surface.
Solution Approach 2:
The characters or text are pre-formed on the flexible printing plate before being applied to the wire. This preliminary preparation of the printing surface eliminates the need for complex mechanical assembly and adjustment of embossing wheels during operation, making the process much easier to operate.
3Ease of manufacture
If additional objects like labels or tubes are used for marking, then the wire marking is achieved, but the device complexity increases due to need for attaching additional objects
Solution Approach 1:
The patent extracts the marking function from separate additional objects (labels, tubes) and integrates it directly into the wire surface through the flexible printing plate. The marking is applied directly to the wire insulation rather than attaching separate components, simplifying the overall construction by eliminating the need for label application mechanisms or tube attachment systems.
Solution Approach 2:
The patent merges the printing function with the wire marking function by directly printing on the wire surface through the flexible printing plate. This combines what would otherwise be separate operations (printing on a label and attaching the label to the wire) into a single integrated process, reducing device complexity.
4Ease of operation
If thermal transfer printing with retransfer band is used, then the ease of operation is improved, but the manufacturing precision must be maintained for proper transfer
Solution Approach 1:
The flexible printing plate is wrapped around the wire to conform to its cylindrical surface, ensuring proper contact and alignment during printing. This curvature adaptation maintains printing precision by allowing the flat printed surface to conform to the round wire, preventing misalignment or uneven transfer that would occur with rigid printing surfaces.
Solution Approach 2:
The flexible printing plate acts as a thin film that can be precisely positioned and wrapped around the wire. Its flexibility allows it to conform exactly to the wire diameter and length, maintaining manufacturing precision while enabling easy operation through simple wrapping and securing actions rather than complex positioning mechanisms.
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
Enables simple and efficient printing of markings on insulated round wires with different diameters using commercially available thermal printers, resulting in a portable and easy-to-operate device that can handle various wire sizes and provides high-contrast identification.
Implementation Method 1
printed with a thermal printer
Implementation Method 2
transferred onto the wire using mold halves with grooves matching the wire diameter
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The printer has a re-printer with a first molded half with a first arrangement for partially holding the wire (16), a second molded half with a groove facing the first arrangement and a heating arrangement and an arrangement for moving the two molded halves (4,5) relative to each other so that an intermediate carrier (7) is applied to the wire surface under heating to transfer the identifier to the wire surface.