Web Cooling System with Zone Control for Asphalt Shingles
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Solution Overview
Problem
Existing cooling systems for moving web materials in production lines, such as asphalt shingles, suffer from uneven cooling due to manual operation, nozzle clogging, and variations in web width, leading to inconsistent product quality and increased water usage.
Innovation Solution
A system with independently controllable cooling zones and temperature sensors that adjust spray nozzle pressure and water application to maintain uniform temperature across the web width, using a combination of evaporative and convective cooling techniques, and can adapt to different web widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manually controlled spray headers are used for cooling, then the system is simple to operate, but uniform cooling across the web width cannot be maintained
Solution Approach 1:
The cooling system is divided into multiple independently controllable spray zones across the web width. Each zone has its own spray headers and nozzles that can be controlled separately, allowing precise adjustment of cooling in different areas to maintain uniform temperature distribution across the entire web.
Solution Approach 2:
The spray system transitions from static manual control to dynamic automated control with adjustable spray patterns. The system can adapt spray pressure, flow rate, and distribution in real-time based on web width variations and temperature measurements, maintaining optimal cooling uniformity despite changing conditions.
2Temperature
If spray pressure is increased to improve cooling effectiveness, then cooling intensity increases, but spray angle changes causing overlapping patterns and non-uniform cooling
Solution Approach 1:
The spray headers incorporate adjustable mechanisms that dynamically modify spray angle and distribution pattern in response to pressure changes. This ensures that even when pressure varies to adjust cooling intensity, the spray pattern remains uniform without overlapping, maintaining consistent cooling across the web width.
Solution Approach 2:
Temperature sensors and flow meters provide real-time feedback on cooling effectiveness and spray characteristics. This feedback is used to automatically adjust spray pressure and angle, ensuring optimal cooling uniformity is maintained despite variations in operating conditions or web properties.
3Reliability
If excess cooling liquid is applied to ensure sufficient cooling, then cooling adequacy is improved, but water usage increases and waste handling is required
Solution Approach 1:
The cooling system applies water locally and precisely where needed on the web surface based on actual temperature requirements. Different zones receive customized cooling rates, eliminating the need to apply excess water across the entire web. This targeted approach ensures adequate cooling while minimizing water consumption and waste.
Solution Approach 2:
The automated control system with temperature sensors and variable frequency drives enables the cooling system to self-regulate water application. The system automatically adjusts spray rates to match actual cooling needs, preventing both under-cooling and over-cooling, thereby optimizing water usage efficiency without manual intervention.
4Manufacturing precision
If the cooling system is designed for a specific web width, then cooling uniformity is optimized, but the system cannot accommodate different web widths without major re-setup
Solution Approach 1:
The cooling system is designed with universally adjustable components that can accommodate multiple web widths. The spray headers are positioned on movable carriages that can be repositioned along the web width, and the spray patterns can be electronically adjusted to match different widths. This multi-functional design maintains cooling uniformity across various web widths without requiring major re-setup.
Solution Approach 2:
The system incorporates dynamic adjustment capabilities through programmable logic controllers and variable frequency drives that adapt spray timing, pressure, and distribution to match different web widths and speeds. This dynamic adaptability allows the same cooling system to optimize performance for various product specifications without physical reconfiguration.
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
Ensures consistent product quality by uniformly cooling the web, reduces water usage, and maintains production efficiency even with shift changes, while minimizing waste and handling of excess liquid.
Implementation Method 1
temperature sensors that adjust spray nozzle pressure and water application to maintain uniform temperature across the web width
Implementation Method 2
using a combination of evaporative and convective cooling techniques
Implementation Method 3
using a combination of evaporative and convective cooling techniques
Data Source
AI summary
An apparatus and method for processing elongated sheet material through a plurality of processing stations including a cooling station for lowering the temperature of the sheet material. The cooling station includes a plurality of individually controllable cooling zones each for controlling a portion of the transverse width of the sheet material during passage through the cooling zone. The cooling zones each include a plurality of cooling fluid directing spray nozzles and a sensor for sensing the temperature of the portion of the sheet material onto which cooling fluid has been directed by the respective cooling zone. A controller responsive to the temperature sensed at each cooling zone is operable for independently controlling the flow of cooling fluid to the fluid spray nozzles of each cooling zone based upon a preset temperature setting of the controller.