Laminated Iron Core Adhesive Supply Segmentation for Precision

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Solution Overview

Problem

Existing methods for manufacturing laminated iron cores face issues with increased manufacturing costs and reduced accuracy due to adhesive flow path complications, nozzle clogging, and variations in adhesive discharge, affecting the flatness, parallelism, and perpendicularity of the laminated iron core.

Innovation Solution

A manufacturing device with individual supply units for applying adhesive to specific regions of the metal sheet, reducing the complexity of adhesive flow paths and minimizing interference with other device components, thereby maintaining consistent adhesive discharge and improving the accuracy of the laminated iron core.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a single supply head with multiple nozzles is used to cover the entire predetermined region, then the adhesive application coverage is improved, but the flow paths become complicated and prone to clogging

Engineering Contradiction:
Improveadhesive application coverage areaVSAvoidflow path complexity
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The single supply head with multiple nozzles is divided into multiple independent supply heads, each with a single nozzle. This segmentation simplifies the flow paths of each supply head, reducing the complexity and susceptibility to clogging, while collectively maintaining comprehensive adhesive application coverage through coordinated operation of multiple supply heads.

Inventive Principle:
Principle #1Segmentation

2Area of stationary object

If a single supply head with multiple nozzles is used to cover the entire predetermined region, then the adhesive application coverage is improved, but the path difference of each flow path becomes large causing variation in adhesive discharge

Engineering Contradiction:
Improveadhesive application coverage areaVSAvoidadhesive discharge consistency
Core Design Contradiction:
Area of stationary objectVSManufacturing precision

Solution Approach 1:

By segmenting the supply system into multiple independent supply heads with single nozzles, each supply head has a short and uniform flow path. This eliminates the large path differences that would otherwise cause variation in adhesive discharge, ensuring consistent adhesive application across the entire predetermined region.

Inventive Principle:
Principle #1Segmentation

3Productivity

If multiple nozzles are provided in a single supply head, then the adhesive application efficiency is improved, but the maintenance work time and labor increase

Engineering Contradiction:
Improveadhesive application efficiencyVSAvoidmaintenance time and labor
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The supply head is segmented into multiple independent units, each with a single nozzle. This segmentation simplifies maintenance operations, allowing individual nozzles to be quickly accessed and cleaned without disassembling complex flow paths. Consequently, maintenance time and labor are reduced while adhesive application efficiency is maintained through parallel operation of multiple supply heads.

Inventive Principle:
Principle #1Segmentation

4Manufacturing precision

If the flow paths are simplified by using individual supply units, then the adhesive discharge consistency is improved, but the number of supply units increases

Engineering Contradiction:
Improveadhesive discharge consistencyVSAvoidnumber of supply units
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

While segmentation increases the number of supply units, each unit is designed to be simple and modular. The standardized design of individual supply heads allows for easy coordination and control, managing the overall system complexity. The benefit of consistent adhesive discharge from each simplified flow path outweighs the increase in the number of units.

Inventive Principle:
Principle #1Segmentation

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 reduces manufacturing costs and enhances the flatness, parallelism, and perpendicularity of the laminated iron core by minimizing adhesive clogging and discharge variations, allowing for high-accuracy production.

Implementation Method 1

flow paths for the adhesive to reach the plurality of nozzles

Methodology Applied
Scientific EffectFluid flow:

Data Source

PatentEP3797892B1Device and method for manufacturing a laminated iron core
Publication Date: 2025.07.09 MITSUI HIGH TEC INC
  • EP3797892B1 patent drawingFigure 1
  • EP3797892B1 patent drawingFigure 2
  • EP3797892B1 patent drawingFigure 3

AI summary

A device and a method for manufacturing a laminated iron core are provided for including: a first supply unit of supplying a first adhesive to a first part of a predetermined region, the predetermined region corresponding to a punched member of a strip-shaped metal sheet intermittently fed in one predetermined direction; a second supply unit arranged at a downstream side in a conveyance direction of the metal sheet with respect to the first supply unit, and of supplying a second adhesive to a second part different from the first part of the predetermined region; and a punching unit of punching the predetermined region of the metal sheet to which the first supply unit and the second supply unit supply the first adhesive and the second adhesive, so as to form the punched member having the first adhesive and the second adhesive applied on the first part and the second part.