Rotating Squeeze Ring for Heat Sealing Laminated Core
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Solution Overview
Problem
Existing methods for manufacturing laminated cores, such as the embossing lamination method, result in inconsistent concentricity and perpendicularity due to shape deviations in lamina members, leading to product defects and quality issues like delamination, especially at the inner diameter side where the adhesive does not cure sufficiently.
Innovation Solution
An apparatus for manufacturing a heat sealing-type rotational laminated core that rotates a squeeze ring by a predetermined pitch and directly heats the inner diameter surface, using a heating element adjacent to the squeeze ring and a rotating die, ensuring uniform adhesion and reducing iron loss and magnetic flux density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the embossing lamination method is used to couple lamina members, then the coupling strength is improved, but the manufacturing precision deteriorates due to inconsistent concentricity and perpendicularity caused by shape deviations
Solution Approach 1:
The invention changes the coupling method from mechanical embossing to thermal bonding using adhesive. The adhesive application parameters, heating temperature, and pressing pressure are optimized to achieve both strong coupling and high manufacturing precision, eliminating the shape deviation issues that plague embossing methods
2Reliability
If the squeeze ring is heated from the outside to cure adhesive, then the outer diameter side adhesion is improved, but the inner diameter side adhesion deteriorates due to insufficient heat conduction
Solution Approach 1:
The heating system is segmented into multiple independent heating zones: outer diameter heating means and inner diameter heating means. This allows separate temperature control and optimization for different regions of the laminated core, ensuring uniform adhesive curing throughout the entire structure
Solution Approach 2:
The invention introduces an inner diameter heating means as an intermediary heating source that directly heats the inner diameter side of the laminated core. This mediator overcomes the insufficient heat conduction from the outer diameter, ensuring proper adhesive curing in the previously problematic inner region
3Productivity
If lamina members are stacked many times to form the core, then the productivity is improved, but the manufacturing precision deteriorates due to accumulated shape deviations
Solution Approach 1:
The invention changes the bonding mechanism from mechanical interlocking to thermal adhesive bonding, which provides more consistent and predictable coupling characteristics. This allows for better control of stacking precision even when many lamina members are stacked, preventing the accumulation of shape deviations
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 good concentricity and perpendicularity of the laminated core, prevents delamination, and reduces iron loss and magnetic flux density by providing consistent heat curing across the inner diameter surface.
Implementation Method 1
the adhesive or an adhesive film applied to the lamina members, to ensure the coupling of the lamina members... the portion is heated by heat conduction of the core itself
Implementation Method 2
heats a squeeze ring in which lamina members are stacked and thermally cures an adhesive or an adhesive film applied to the lamina members
Implementation Method 3
capable of stacking lamina members while rotating a squeeze ring by a predetermined pitch
Data Source
Figure 1~2
Figure 3
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AI summary
A heat sealing-type rotational laminated core manufacturing apparatus, according to the present invention, is a laminated core manufacturing apparatus comprising an upper mold (3) and a lower mold (4) and forming and stacking individual laminar members (101), the individual laminar members (101) being formed by having a strip (100A) which is sequentially transferred on an upper portion of the lower mold (4) undergo a piercing process and a blanking process by means of punches provided to the upper mold (3), wherein the laminated core manufacturing apparatus further comprises: a squeeze ring (201) installed on a lower portion of a blanking die (11) for the blanking process; a heating means (202) installed on an outer portion of the squeeze ring (201); and a rotating die (203) having the squeeze ring (201) and the heating means (202) installed therein so as to rotate by a predetermined pitch with the squeeze ring (201) and the heating means (202).