Rotating Wheel Hot Melt Glue Applicator for Filter Elements
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Solution Overview
Problem
Existing apparatuses for applying glue to air line panel filters are limited by slow production rates due to slow glue hardening, which restricts the number of parts processed per minute and results in glue adhering to applicators, leading to increased scrap and reduced efficiency.
Innovation Solution
An apparatus with a dispenser and cooling arrangement using rotatable wheels to apply and cool adhesive material, allowing for precise application and increased production rates by ensuring the glue hardens on the applicator surface while remaining soft and tacky for filter elements, featuring adjustable wheels and compressed air cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glue is applied to filter elements using a conventional belt-based apparatus, then glue transfer is achieved, but production rate is limited to 4-5 parts per minute due to slow glue hardening
Solution Approach 1:
The invention changes the temperature parameter by introducing a cooling arrangement that cools the applicator wheels to below ambient temperature. This parameter change accelerates glue hardening on the wheel surface while maintaining tackiness for transfer, resolving the contradiction between fast hardening and fast production rate
Solution Approach 2:
The invention replaces the conventional mechanical belt-based glue transfer system with a rotating wheel system that uses controlled cooling. This substitution enables precise control of glue hardening through temperature management rather than relying solely on mechanical conveyance time
2Reliability
If glue is applied using conventional apparatus, then glue transfer occurs, but glue adheres to applicators causing increased scrap
Solution Approach 1:
By controlling the temperature of the applicator wheels through the cooling arrangement, the invention creates optimal surface conditions for glue release. The cooled surface allows glue to harden sufficiently to release cleanly without adhering to the applicator, eliminating scrap while maintaining reliable transfer
Solution Approach 2:
The invention creates different thermal zones: the wheel surface is cooled to promote hardening and release, while the glue bead interior remains warm and tacky for proper transfer. This local quality differentiation resolves the contradiction between reliable transfer and scrap prevention
3Productivity
If conventional glue application is used, then production is limited, but increasing speed causes glue to pull off filter elements
Solution Approach 1:
The cooling of the applicator wheels creates a controlled temperature gradient that allows the glue skin to form rapidly on contact with the wheel surface. This parameter change enables the glue to set quickly enough to prevent pulling off at high speeds while maintaining proper adhesion to the filter element during transfer
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 design enhances production rates by reducing glue usage by 50%, minimizing scrap, and enabling faster drying, resulting in a smooth finish and increased parts processed per minute without the need for reprocessing.
Implementation Method 1
a cooling arrangement. The cooling arrangement cooperates with the transfer arrangement to cool the discharged adhesive material while the adhesive material is carried by the transfer arrangement to the adhesive material receiving portions of the elements
Implementation Method 2
at least one conduit, such as a conduit within a hollow shaft on which the wheel is mounted, by which cooled compressed air can be supplied to a hollow interior of the wheel
Data Source
AI summary
An apparatus for transferring adhesive material to portions of filter elements that are displaced relative to the apparatus includes a dispenser from which heated adhesive material is discharged, a transfer arrangement that receives discharged adhesive material and transfers the discharged adhesive material to the portions of the elements as they are displaced, and a cooling arrangement. The cooling arrangement cooperates with the transfer arrangement to cool the discharged adhesive material while the adhesive material is carried by the transfer arrangement to the adhesive material receiving portions of the elements. A process by which adhesive material is transferred to adhesive material receiving portions of the filter elements, as well as an air line panel filter produced by that process, are also discussed.