Lamination Device Recesses for Thermoplastic Tab Quality
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Solution Overview
Problem
Existing lamination devices often result in inconsistent quality of tabs, particularly those made of thermoplastic polyurethane, due to shrinkage during the lamination process, leading to potential detachment or loosening over time, especially when used in articulated connections like passports.
Innovation Solution
A lamination device with first and second lamination sheets featuring recesses and depressions that position the tab between them, maintaining a consistent distance and reducing direct contact with pressure surfaces, thereby minimizing temperature-induced deformation and ensuring high-quality tab attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If raised areas or additional material are used to bridge the height difference between the tab and data sheet, then the temperature is reduced, but the tab material (especially thermoplastic polyurethane) undergoes shrinkage leading to inconsistent quality and potential defects
Solution Approach 1:
The patent introduces an intermediary structure (the recessed area in the lamination sheet) that mediates between the tab and the heating element. This recessed area acts as a thermal barrier, reducing direct heat transfer to the tab while still allowing the lamination process to function. The intermediary structure solves the contradiction by protecting the temperature-sensitive tab from excessive heat without compromising the lamination effectiveness.
Solution Approach 2:
The patent applies local quality by creating a recessed area specifically in the region where the tab is located, while the rest of the lamination sheet maintains its standard structure. This localized modification allows different regions of the lamination sheet to have different thermal properties - the recessed area provides thermal protection to the tab, while other areas maintain normal heat transfer characteristics for effective lamination.
2Adaptability or versatility
If the tab is made of thermoplastic polyurethane to enable flexible binding, then the flap can be easily integrated, but the material contracts under elevated temperatures causing shrinkage defects
Solution Approach 1:
The recessed area in the lamination sheet serves as a protective intermediary that shields the thermoplastic polyurethane tab from excessive heat during the lamination process. This thermal protection prevents the tab material from contracting or deforming, thereby maintaining its structural integrity and reliability over time while still allowing the flexible binding function to be achieved.
Solution Approach 2:
The recessed area is designed beforehand to provide thermal cushioning protection to the tab during the lamination process. This prior protective measure prevents temperature-induced deformation before it can occur, ensuring the tab maintains its dimensional stability and prevents shrinkage defects that would compromise long-term reliability.
3Device complexity
If flat lamination sheets are used to simplify the device, then the manufacturing process is straightforward, but the tab experiences direct contact with pressure surfaces causing thermal stress and deformation
Solution Approach 1:
The patent modifies the lamination sheet by creating a recessed area specifically in the tab region, while maintaining the overall simplicity of the flat sheet structure. This localized modification provides thermal protection to the tab without requiring complete redesign of the entire lamination sheet, thus balancing device simplicity with manufacturing precision requirements.
Solution Approach 2:
The lamination sheet is segmented into different functional regions: a flat area for standard lamination operations and a recessed area for tab protection. This segmentation allows the sheet to perform multiple functions - maintaining overall simplicity for easy manufacturing while providing localized precision protection for the tab against thermal stress and deformation.
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 ensures a consistently high-quality tab connection by reducing thermal stress and maintaining structural integrity, preventing loosening or detachment during articulated movements, thus enhancing the durability of laminate products.
Implementation Method 1
During lamination, these surfaces are brought into contact with the layers to be bonded under pressure and elevated temperature, creating a material-bonded connection between the individual layers
Implementation Method 2
During lamination, these surfaces are brought into contact with the layers to be bonded under pressure and elevated temperature
Implementation Method 3
maintaining a consistent distance and reducing direct contact with pressure surfaces, thereby minimizing temperature-induced deformation
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a lamination device for producing a laminate product with a flap, comprising a first lamination sheet extending longitudinally along a longitudinal axis with a first flat pressure surface associated with the top side of the laminate product, wherein a first recess is provided in the first lamination sheet in addition to the first flat pressure surface, and a second lamination sheet with a second flat pressure surface associated with the underside of the laminate product, wherein a second recess is provided in the second lamination sheet in addition to the second pressure surface. The object of the invention is to provide a lamination device for producing a laminate product and a method for producing a laminate product that enable the bonding of a flap to a layered body with the highest possible quality.This is achieved by forming the first depression and the second indentation as grooves, with the first depression being located near an edge region of the first lamination sheet and the second depression being located near the edge region of the second lamination sheet.