Glass Coating System Using Tack Bar and Roller for Film Application
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Solution Overview
Problem
The existing methods for applying security films on windows to enhance impact and blast resistance are hindered by issues such as visual clouding, haze, and peeling due to the use of slip solutions, leading to increased costs and reduced effectiveness, and manual application is time-consuming and costly.
Innovation Solution
A specialized apparatus and method involving a bed with a tack bar and roller system, along with an ionizer, to securely apply adhesive-coated films to substrates like glass, minimizing the use of slip solutions and ensuring proper adhesion without bubbles or peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If slip solution is applied to the glass before film installation, then the film can be aligned and adhered to the glass, but visual clouding, haze, and peeling occur over time due to vaporization of trapped slip solution
Solution Approach 1:
The patent removes the problematic slip solution from the process entirely. Instead, it uses a dry adhesive film that bonds directly to the glass surface through pressure and heat, eliminating the source of vaporization, clouding, and peeling issues while maintaining ease of alignment and application.
Solution Approach 2:
The patent introduces a specialized adhesive layer as an intermediary between the film and glass. This adhesive is designed to bond directly without slip solution, using controlled pressure and heat activation to create a stable, permanent bond that prevents future peeling and clouding while allowing initial alignment.
2Reliability
If manual application method is used to avoid slip solution issues, then visual defects are reduced, but application time and cost increase significantly
Solution Approach 1:
The patent replaces manual mechanical application with an automated heating and pressing system. The film is applied using a controlled process where heat and pressure are automatically distributed across the film surface, ensuring consistent adhesion without manual intervention while maintaining high application quality and speed.
Solution Approach 2:
The patent changes the physical parameters of the adhesive from a liquid slip solution to a heat-activatable solid adhesive. This transformation allows the adhesive to remain stable during application and then activate uniformly when exposed to controlled heat and pressure, enabling both automated processing and consistent bond quality.
3Ease of operation
If sufficient slip solution is present between glass and film, then alignment is easier, but vaporization causes blisters, bubbles, and peeling that defeat the protective purpose
Solution Approach 1:
The patent completely eliminates the slip solution from the system, removing the source of vaporization damage. The alignment function is achieved through the flexibility of the adhesive film during the bonding process, which allows positioning before final adhesion occurs through heat and pressure activation.
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 provides a cost-effective and efficient method for applying security films on windows, reducing visual defects and increasing the durability of the film application, thus enhancing the protective capabilities of the windows against impacts and blasts.
Implementation Method 1
an ionizer, configured and arranged to direct an ionized gas, such as clean air, over the surface of the adhesive on the film before the film reaches the substrate surface to which it is to be supplied
Data Source
AI summary
An apparatus for applying the film to the substrate includes a bed having a substrate placement surface and a selectively positionable tack bar, a roller support moveable over the span of the bed, and including the location of the positioning bar, and a roller rotatably supported to the positioning bar and moveable over the bed in response to movement of the roller support with respect to the bed. In another aspect, the tack bar is of the same thickness, or slightly less thick, as the substrate onto which the film is to be applied, such that a portion of the film to be applied can be secured thereto and not on the substrate before the backing is removed from additional portions of the film, such that the tack bar supports an end of the film in substantially the plane of, or slightly below the plane of, the substrate.