Lamination Stack Bonding with UV Pre-Activated Adhesive
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Solution Overview
Problem
The existing methods for manufacturing lamination stacks using adhesives that generate heat during activation cause deformation and electrical interference, necessitating costly cooling systems.
Innovation Solution
Utilizing an adhesive pre-activated with radiation in a wavelength range below infrared (300-700 nm) to ensure reliable stacking without heat-induced deformation, allowing immediate handling and shipment of lamination stacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If infrared radiation is used to activate the adhesive, then the adhesive activation is easy to achieve, but heat is generated in the metal lamination causing deformation and electrical interference
Solution Approach 1:
The patent changes the wavelength parameter of the activating radiation from infrared range to ultraviolet or visible light range (below infrared wavelengths). This parameter change allows adhesive activation without generating harmful heat in the metal lamination, thus resolving the contradiction between ease of activation and avoidance of heat-induced deformation.
2Manufacturing precision
If cooling systems are used to prevent lamination deformation, then deformation is minimized, but equipment expenditure increases
Solution Approach 1:
The patent extracts and eliminates the cooling system from the manufacturing process by using radiation with wavelengths below the infrared range. This allows adhesive activation without heat generation, thereby preventing lamination deformation without requiring any cooling equipment, thus resolving the contradiction between manufacturing precision and device complexity.
3Productivity
If the adhesive reaction time is short, then the lamination stack can be handled immediately, but the adhesive may not achieve sufficient stack strength
Solution Approach 1:
The patent applies preliminary action by pre-activating the adhesive with ultraviolet or visible light before stacking the laminations. This preliminary activation allows the adhesive to begin bonding immediately upon stacking, enabling immediate handling of the lamination stack while still achieving sufficient strength through the ongoing curing process during and after stacking.
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 method ensures strong and stable lamination stacks without deformation or electrical interference, eliminating the need for cooling systems and enabling immediate handling and delivery.
Implementation Method 1
use is made of an adhesive which can be pre-activated with radiation which lies in a wavelength range below the wavelength range of IR radiation
Data Source
AI summary
The method is used to manufacture lamination stacks (3) out of laminations (2) lying on top of one another which are cut out of a starting material (1) and are joined to one another using a radiation-activatable adhesive (4) within the lamination stack (3). The adhesive (4) is irradiated with radiation with a wavelength range below IR radiation for pre-activation. The installation used for this purpose has at least one application device for applying the adhesive (4) to a lamination (2). The adhesive (4) is irradiated with at least one radiation source (32) which emits radiation in a wavelength range below the infrared range.