Heat and Pressure Transfer Machine for Protective Layer Detachment
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Solution Overview
Problem
Existing techniques for transferring protective layers onto substrates, such as official identification documents, are inefficient due to slow production rates, suboptimal adhesion quality, high equipment costs, and potential damage to RFID components, particularly in hot rolling methods and two-jaw pressing systems.
Innovation Solution
A heat and pressure transfer machine with a knife-like element arranged perpendicularly to the laminate, allowing translaminar shearing forces for detachment, and a system of alternating cylinder movements for precise positioning and tension control, enabling rapid and effective transfer without bending the substrate and preserving document shine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot rolling techniques with two rotating cylinders are used, then adhesion of protective film to substrate is achieved, but production rate is slow and adhesion quality is not optimal
Solution Approach 1:
The patent divides the single contact line into multiple contact lines by arranging several pressing means around a central drum. This segmentation allows simultaneous adhesion at multiple points, increasing production rate while maintaining adhesion quality through distributed pressure application.
Solution Approach 2:
The patent transitions from linear contact (single line) to radial contact (circular arrangement of pressing means around drum). This dimensional change from 1D to 2D contact geometry enables multiple pressing points to act simultaneously on the substrate-film assembly, improving both productivity and adhesion uniformity.
2Reliability
If multiple pairs of cylinders are used to improve adhesion, then adhesion quality improves, but equipment cost and size increase
Solution Approach 1:
The central drum serves multiple functions: it provides the heating surface, acts as the pressure application point, and serves as the axis around which all pressing means are arranged. This multi-functionality reduces the need for separate heating and pressing mechanisms, lowering equipment complexity and cost while maintaining adhesion quality.
Solution Approach 2:
The patent combines the heating function and pressing function into a single integrated system where the drum and pressing means work together as one unit. This merging eliminates the need for separate heating cylinders and pressing rollers, reducing equipment size and cost while achieving optimal adhesion.
3Productivity
If a single drum with pressing means arranged around is used, then production rate improves, but substrate bends and creases form
Solution Approach 1:
The pressing means are arranged to apply pressure at specific localized points around the drum rather than uniformly across the entire substrate surface. This localized pressing minimizes overall substrate bending while achieving effective adhesion at the contact points, preventing crease formation.
Solution Approach 2:
The pressing means are designed to apply dynamic pressure that adjusts to the substrate's position and flexibility. This dynamic pressing approach allows the substrate to maintain its shape while still achieving effective adhesion, preventing permanent deformation and creases.
4Productivity
If pressure rollers are used for transfer, then transfer speed improves, but RFID components are damaged
Solution Approach 1:
The patent introduces a detachment layer as an intermediary between the protective film and the substrate. This layer allows the film to be transferred at high speed while the detachment mechanism prevents excessive pressure from reaching the RFID components embedded in the substrate, protecting them from damage.
Solution Approach 2:
The patent extracts the pressure application function from direct contact with the substrate by using a separate detachment layer system. The pressing means apply pressure to the film-detachment layer assembly rather than directly to the substrate, isolating the RFID components from harmful pressure while maintaining transfer speed.
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
The solution enables rapid, high-quality transfer of protective layers onto large surfaces with reduced equipment costs, preserving the substrate's integrity and avoiding damage to RFID components, while ensuring reliable and efficient detachment of the transfer layer.
Implementation Method 1
At least one of the jaws is heated
Implementation Method 2
It is thus translaminar shearing forces, that is to say perpendicular to the plane of the laminate, which allow the detachment of the substrate to which the transfer layer is bonded
Implementation Method 3
a layer of glue which adheres to the substrate to be protected
Data Source
Figure 1
Figure 2~2A
Figure 3
AI summary
The present invention relates to a machine for transferring, at high temperature and under pressure, at least one layer, known as a transfer layer, that is a constituent part of a multilayer laminate (10), said transfer layer being intended in particular for the protection of a flat substrate (100).