Dual Pump Adhesive Applicator for High-Viscosity Roofing
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Solution Overview
Problem
Conventional pump-driven applicator systems struggle to reliably apply high-viscosity two-part polyurethane adhesives due to temperature sensitivity and viscosity changes, affecting their performance in roofing applications.
Innovation Solution
A pump-driven applicator system with a prime mover, gearbox, and dual pumps connected to accumulators and manifolds, which includes a configuration to handle high-viscosity adhesives by using separate inlets and outlets for each compound, ensuring reliable mixing and application onto roofing substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high-viscosity adhesive is used to account for temperature effects, then temperature sensitivity is reduced, but pump-driven applicator systems become unable to reliably pump the adhesive
Solution Approach 1:
The system divides the adhesive application into two separate streams - one for component A and one for component B. Each component is pumped separately through its own pump and accumulator, then mixed just before application. This segmentation allows each pump to handle lower-viscosity individual components rather than the high-viscosity mixed adhesive, resolving the pumping reliability issue while maintaining temperature stability through the mixed formulation.
Solution Approach 2:
The accumulators store pre-prepared portions of each adhesive component under controlled conditions before mixing. This preliminary preparation allows the system to maintain components at optimal viscosity for pumping while only mixing the final high-viscosity formulation immediately before application, ensuring both pumpability and temperature sensitivity reduction.
2Strength
If conventional two-part polyurethane adhesives are used, then adhesion performance is achieved, but weather condition sensitivity affects viscosity and reaction speed
Solution Approach 1:
The system applies different formulations of components A and B tailored for specific temperature ranges and weather conditions. Each component can be independently formulated to compensate for environmental factors, and the mixing ratio can be adjusted locally based on conditions. This allows the adhesive system to maintain consistent performance across varying weather while preserving the required adhesion strength.
Solution Approach 2:
The system allows dynamic adjustment of the adhesive formulation and mixing parameters in response to weather conditions. The separate component storage and mixing enable real-time adaptation of viscosity and reaction characteristics without compromising the fundamental adhesion performance, making the system versatile across different environmental conditions.
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 system effectively handles high-viscosity two-part polyurethane adhesives, maintaining consistency across varying temperatures, ensuring reliable adhesion and application efficiency on roofing substrates.
Implementation Method 1
a first pump connected to the gearbox for receiving the output torque from the gearbox, the first pump having an inlet and an outlet, a second pump connected to the gearbox for receiving the output torque from the gearbox, the second pump having an inlet and an outlet
Implementation Method 2
a first accumulator in communication with the outlet of the first pump, a second accumulator in communication with the outlet of the second pump
Implementation Method 3
Each applicator has a first inlet and a second inlet in communication with the first manifold and the second manifold, respectively, for receiving the first compound and the second compound, and has an outlet, wherein the plurality of applicators mix the first compound with the second compound to form the two-part adhesive
Implementation Method 4
The two parts include an isocyanate blend and a simple polyol blend. Upon mixing, the isocyanate blend reacts or crosslinks with the simple polyol blend to form the polyurethane adhesive.
Data Source
AI summary
A system and method for applying a two-part adhesive to a substrate includes a prime mover for providing an output torque, a first pump connected to the prime mover for receiving the output torque, the first pump having an inlet and an outlet, a second pump connected to the prime mover for receiving the output torque, the second pump having an inlet and an outlet, a first compound in communication with the inlet of the first pump, a second compound in communication with the inlet of the second pump, a first accumulator in communication with the outlet of the first pump, a second accumulator in communication with the outlet of the second pump, a first manifold in communication with the outlet of the first pump, and a second manifold in communication with the outlet of the second pump.