Dual-Adhesive Shingle Strip Application at High Line Speeds
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Solution Overview
Problem
Existing technologies struggle to apply self-seal strips with alternating dots of different adhesives having different tacking temperatures or properties at high line speeds during roofing shingle manufacturing.
Innovation Solution
A system and method involving two applicator assemblies, where a first applicator wheel applies a linear array of a first adhesive, and a second applicator wheel synchronizes to apply a second adhesive in the spaces between the first adhesive dots, or applies a layer of the second adhesive onto the first adhesive dots, forming multi-layer adhesive dots with dual properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alternating dots of different adhesives are applied to shingle stock, then the sealing performance under various weather conditions is enhanced, but the device complexity increases due to requiring multiple applicator assemblies
Solution Approach 1:
The self-seal strip application is divided into multiple independent dots, each capable of having different adhesive properties. The first applicator assembly applies dots of a first adhesive while the second applicator assembly applies dots of a second adhesive, allowing different adhesive types to be applied to different segments (dots) of the same continuous strip, thereby enhancing overall sealing performance under various weather conditions
Solution Approach 2:
Multiple applicator assemblies operate simultaneously on the same moving web of shingle stock to apply different adhesives to different dots within the self-seal strip. This merging of multiple application functions into a single continuous process enables complex multi-adhesive patterns to be applied without requiring separate processing steps, thus managing device complexity while improving sealing performance
2Adaptability or versatility
If a second adhesive layer is applied onto previously applied adhesive dots to form multi-layer adhesive dots, then dual adhesive properties are achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The first applicator assembly applies the first adhesive dots to the moving web before the second applicator assembly applies the second adhesive dots. This preliminary application establishes the foundation for the multi-layer structure, and the synchronized operation of the second applicator ensures precise alignment with the previously applied dots, achieving dual adhesive properties while managing precision requirements
Solution Approach 2:
The applicator assemblies are synchronized to maintain precise alignment between the first and second adhesive applications. The system uses feedback mechanisms to ensure that the second adhesive dots are accurately positioned relative to the first adhesive dots, allowing for the formation of precisely aligned multi-layer adhesive dots with dual properties
3Productivity
If applicator wheels operate at higher rotation rates to accommodate higher line speeds, then productivity increases, but the difficulty of detecting and measuring alignment increases
Solution Approach 1:
The system replaces complex mechanical alignment measurement systems with synchronized rotation control. By coordinating the rotation rates of the applicator wheels with the web feed rate, the system maintains precise alignment at high speeds without requiring complex real-time measurement and adjustment mechanisms, thus improving productivity while managing measurement difficulty
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
Enables the application of multi-adhesive self-seal strips with synergistic properties at higher line speeds, enhancing shingle performance by balancing adhesive properties for cold and hot weather conditions.
Implementation Method 1
The first applicator assembly includes a first applicator wheel that applies a linear array of adhesive dots of a first adhesive material
Implementation Method 2
the second applicator assembly can include a second applicator wheel synchronized with the first applicator wheel so that it applies a second array of adhesive dots of a second, different adhesive material
Implementation Method 3
The previously applied first adhesive dots move through the puddle and pick up a layer of the second adhesive to form multi-adhesive dots
Data Source
AI summary
Systems and methods of applying self-seal strips of multiple different adhesives are disclosed. In one embodiment, two spaced apart spoked applicator wheel assemblies are positioned beneath a web of moving shingle stock such that each of the applicator wheels applies dots of different adhesives in an alternating pattern. In other embodiments, a layer of a second adhesive is deposited onto previously applied dots of a first adhesive to form layered adhesive dots with dual properties of both adhesives.