Lamellar Package Glue Roller Assembly for Precise Bonding
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Solution Overview
Problem
Traditional methods for assembling lamellar packages, such as those used in electric machines, face issues with glue waste, dispersion, and frequent machine stops for maintenance, leading to increased production times and costs, as well as mechanical and dimensional inaccuracies due to fluid-dynamic constraints.
Innovation Solution
An apparatus utilizing draft and mould rollers to apply glue mechanically, eliminating nozzle-based application and allowing for precise, clean bonding without fluid-dynamic constraints, reducing maintenance needs and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nozzle-based glue application is used, then glue can be applied to laminations, but glue waste and dispersion occur leading to increased costs and reduced precision
Solution Approach 1:
The patent replaces the fluid-dynamic nozzle-based glue application system with a mechanical roller-based system. The rollers directly contact the laminations and apply glue through mechanical pressure and rotation, eliminating the fluid spray mechanism that causes dispersion and waste. This mechanical substitution achieves precise glue application at the exact contact points between laminations.
2Productivity
If nozzle-based glue application with pumps is used, then glue can be supplied to the bonding process, but machine stops for maintenance and control are required extending production times
Solution Approach 1:
The patent eliminates complex pump and nozzle systems by using simple mechanical rollers that can be directly driven by the lamination feeding mechanism. This simplified mechanical system requires no separate glue supply pumps, no complex fluid pressure control, and no prone-to-clogging nozzles, thereby eliminating the need for frequent maintenance stops and control interventions that interrupt production.
Solution Approach 2:
The roller-based glue application system is integrated with the lamination feeding and bonding process itself. The rollers are automatically positioned and activated by the presence of laminations, applying glue only when and where needed. This self-regulating mechanism eliminates the need for separate control systems and maintenance interventions, allowing continuous operation.
3Manufacturing precision
If fluid-dynamic glue application is used, then glue can be deposited on sheets, but fluid-dynamic constraints cause mechanical and dimensional inaccuracies
Solution Approach 1:
The patent replaces fluid-dynamic glue delivery with direct mechanical contact through rollers. The glue is applied through the physical pressure and motion of rollers contacting the lamination surfaces, eliminating all fluid-dynamic variables such as pressure fluctuations, flow rate variations, and spray pattern inconsistencies that compromise dimensional accuracy. The mechanical system provides stable, repeatable glue application.
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 apparatus enables efficient, precise, and cost-effective assembly of lamellar packages with reduced machine downtime, improved cleanliness, and enhanced durability, achieving high performance and yield.
Implementation Method 1
a first roller (16), placed in contact with the glue contained in the tray (24) and rotating with respect to a horizontal rotation axis thereof, withdraws a quantity of glue from the tray (24) which goes to cover the outer surface of said first roller (16)
Implementation Method 2
a second roller (22)...rotating with respect to a horizontal rotation axis...deposits a layer of glue (33) on a lower surface (32') of a sheet (32) which advances step by step
Implementation Method 3
The first wheel (14) and the second wheel (20) are defined by gears which engage with each other to define a transmission (11) functional to achieve a rotational movement of the first roller (16) and the second roller (22)
Implementation Method 4
the gluing takes place in a sheet detachment station by adhering the upper part of the lamination with the first glue layer with the lower side of a subsequent lamination covered with the second glue component
Data Source
Figure 1~2
Figure 3~5
AI summary
An apparatus (10) for assembling lamellar packages for electrical use in electric machines such as motors, generators, transformers, meters, ignition coils and similar electrical equipment by means of a bonding with mono- or bi-component glue, arranged outside or inside a shearing mould (30) and comprising means for applying a quantity of glue (33) on a lower surface (32') of a sheet (32) according to a pitch corresponding to the advancement pitch of said sheet (32), said means for applying a quantity of glue comprising means for withdrawing the glue from a container element and means for depositing said glue in simultaneous and synchronous movement with the advancement of the sheet (32) and shearing the laminations by means of a transmission (11).