Spray Gun Pressure-Temperature Control for Consistent SPF Mixing
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Solution Overview
Problem
Existing fluid delivery systems, particularly Spray Polyurethane Foam (SPF) systems, face issues with unequal pressure and temperature control of reactive fluid streams at the spray gun, leading to poor mixing, material build-up, and system downtime due to cross-over, and inconsistent foam quality.
Innovation Solution
Implementing independent pressure and temperature sensors at the spray gun, along with a control system to manage fluid pressures and temperatures independently, ensuring equal pressures and temperatures of the fluid streams at the gun, and using an air capless design with ergonomic features for improved handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If independent pressure and temperature sensors and control system are implemented at the spray gun, then fluid pressure and temperature control precision is improved, but device complexity increases
Solution Approach 1:
The system divides the fluid delivery into separate controllable streams, with independent pressure and temperature sensors for each fluid stream. This segmentation allows precise control of each component fluid independently, ensuring equal pressures and temperatures at the spray gun while maintaining manageable system complexity through modular sensor and control placements.
2Manufacturing precision
If equal pressures and temperatures of fluid streams are maintained at the spray gun, then mixing efficiency and foam quality are improved, but system complexity and control difficulty increase
Solution Approach 1:
The system employs pressure sensors and temperature sensors that provide continuous feedback on the state of each fluid stream. This feedback mechanism allows the control system to automatically adjust and maintain equal pressures and temperatures of reactive fluid streams at the spray gun, ensuring consistent mixing efficiency and foam quality without requiring complex manual control.
3Ease of operation
If air capless design with ergonomic features is used, then ease of operation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent removes the traditional air cap component from the spray gun design, creating an air capless system. This extraction of the air cap simplifies the overall structure, improves ease of operation by reducing points of failure and maintenance, and eliminates the complexity of air cap manufacturing and assembly while maintaining effective spray functionality.
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
Enhances impingement mixing efficiency, reduces material waste and system downtime, and ensures consistent foam quality by maintaining equal fluid pressures and temperatures at the spray gun, facilitating better deposition patterns and ease of operation.
Implementation Method 1
These systems deliver two or more materials through hoses from a stationary pumping system (e.g., proportioner system) to a fluid gun or spray foam gun used to apply the material to a structure
Data Source
AI summary
A fluid delivery system can include a tank holding the fluid to be delivered, a pump fluidly coupled to the tank, and a spray gun. The spray gun can include a handle, a winged extension member disposed to contact at least a portion of an operator's hand when the operator holds the spray gun by the handle, and a strap.