Layer Transfer Device Peeling Roller Angle Control
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Solution Overview
Problem
The sheet tends to curl when passing through the nip part of the heating roller and pressing roller, leading to partial peeling from the multilayer film before reaching the peeling roller, resulting in excess or insufficient transfer of the transfer layer onto the toner image.
Innovation Solution
A layer transfer device is configured with a peeling roller positioned between the film transfer unit and the wind-up reel, where the peeling roller changes the conveying direction of the multilayer film, allowing it to be peeled off from the sheet after the transfer layer has cooled and the sheet is in close contact with the multilayer film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the sheet is conveyed through the nip part of the heating roller and pressing roller, then thermal transfer is performed, but the sheet curls and peels off from the multilayer film before reaching the peeling roller
Solution Approach 1:
The peeling roller is positioned to change the conveying direction of the multilayer film before the sheet can curl away from it. This preliminary directional change keeps the sheet and multilayer film in close contact during the critical transfer period, preventing premature peeling and ensuring complete transfer layer transfer onto the toner image
2Productivity
If the multilayer film is peeled off at a sharp angle, then peeling is efficient, but the transfer layer is excessively transferred causing burrs
Solution Approach 1:
The peeling roller changes the conveying direction of the multilayer film by a controlled angle (15-37 degrees) rather than a sharp angle. This parameter change in the peeling angle allows efficient peeling while preventing excessive transfer layer transfer that would cause burrs, achieving both productivity and manufacturing precision
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 configuration prevents the sheet from being peeled prematurely from the multilayer film, ensuring a precise transfer of the transfer layer onto the toner image without excess or deficiency, resulting in sharp edges and minimal burrs.
Implementation Method 1
after the sheet and the multilayer film are caused to pass a nip part of a heating roller and a pressing roller and to perform thermal transfer
Implementation Method 2
the peeling roller contacting the multilayer film having passed the film transfer unit, the peeling roller being configured to peel off the multilayer film from the sheet
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A foil transfer device 1, which provides a layer transfer device capable of transferring a transfer layer to a toner image in a transfer section without deficiency or excess, includes: a sheet conveyance part; a supply reel and a wind-up reel 31; a film transfer part 50 that performs transfer while a multilayer film F supplied from the supply reel is in a condition of being overlaid on a sheet S conveyed from the sheet conveyance part; and a peeling roller 43 that peels away the multilayer film F from the sheet S. The film transfer part 50 comprises a first roller (pressing roller 51) that is provided in a location contacting the sheet S, and a second roller (heating roller 61) that is provided in a location contacting the multilayer film F, and the sheet S and the multilayer film F are overlaid, heated, and pressed at a nipping part NP of the first roller and the second roller. A tangent line TL of the second roller passes between the center of the second roller and the center of the peeling roller 43, and an angle of 15-37 degrees is formed between the tangent line TL and a film tension section FT of the multilayer film F, which is under tension between the nipping section NP and the peeling roller 43.