Security Page Layer Alignment via Ultrasonic Pressing and Welding
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Solution Overview
Problem
Existing methods for producing security pages with holes through multiple layers fail to maintain layer alignment during punching, leading to misalignment issues during subsequent production phases, which is critical for achieving a securely laminated security page.
Innovation Solution
The method involves pressing and welding the layers together at the edges of the hole to maintain alignment, using an ultrasonic cutter and welding tool to cut and weld the layers, ensuring they remain fixed until lamination, where they are then securely attached with a transparent material inserted into the hole.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If layers are punched through to create a hole, then transparent material can be inserted to create a window, but the layers move out of alignment during punching and subsequent production phases
Solution Approach 1:
The layers are pressed together before punching to pre-establish the correct mutual positions and prevent movement during the punching operation. This preliminary pressing action ensures that when the hole is subsequently punched through multiple layers, the layers remain in their predetermined aligned positions rather than shifting during the punching process
Solution Approach 2:
A pressing device is introduced as an intermediary element between the layers and the punching tool. This pressing device applies force to hold the layers together in correct alignment during the punching operation, acting as a mediator that enables the punching process to proceed without compromising layer alignment
2Manufacturing precision
If layers are pressed together to maintain alignment, then punching precision improves, but additional pressing equipment and process steps are required
Solution Approach 1:
The pressing and welding functions are merged into a single integrated system. The pressing device not only holds layers together during punching but also subsequently welds the layers at the edges of the hole to permanently secure their aligned positions. This merging of functions reduces the need for separate pressing and welding equipment and process steps
Solution Approach 2:
The pressing device is designed with multi-functionality, serving both to press layers together for alignment during punching and to weld layers at the hole edges for permanent fixation. This universal device performs multiple critical functions in the manufacturing process, reducing overall system complexity despite the increased precision requirements
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 approach ensures precise alignment and secure attachment of layers, allowing for the production of security pages with uniform thickness and a transparent window, enhancing the structural integrity and appearance of the security page.
Implementation Method 1
using an ultrasonic cutter and welding tool to cut and weld the layers
Implementation Method 2
the layers are welded to each other at the edges of the hole
Data Source
Figure 1A~1E
Figure 2~3
AI summary
The present invention relates to a method of manufacturing a security page, comprising: arranging a plurality of layers (1) on top of each other. In order to produce a security document with a plurality of layers the method comprises: pressing said plurality of layers (1) towards each other in order to prevent said layers from moving, cutting (5) a hole through each of said plurality of layers (1), welding (5) said plurality of layers (1) to each other at edges of said hole, and attaching said plurality of layers (1) and said transparent material to each other by laminating.