Glass Forming Cooling Air Control via Heat Loss Feedback
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Solution Overview
Problem
Existing methods for controlling blown air in glass forming processes do not adequately account for the temperature-related mechanical stability and deformation behavior of hollow glass articles, leading to inconsistent product quality due to external and internal interference factors such as wear and tear.
Innovation Solution
A method and device that record heat loss in sections of the glass forming machine, adjusting cooling air volume flow based on setpoint values to maintain uniform temperature conditions, and vary blowing and suction work parameters to achieve defined deformation speeds, using a mathematical model to regulate blowing and cooling air flows for stable operating parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If blowing air pressure and volume flow are increased to improve shaping speed and productivity, then the mechanical stability of the hollow glass article deteriorates due to temperature-related deformation
Solution Approach 1:
The patent implements dynamic adjustment of blowing air parameters by continuously monitoring the actual temperature of the hollow glass article during the forming process. The control device modifies the blowing air volume flow and pressure in real-time based on temperature feedback, allowing the system to adapt to changing thermal conditions and maintain mechanical stability while optimizing shaping speed.
Solution Approach 2:
The patent employs a feedback control mechanism where temperature sensors measure the actual temperature of the hollow glass article, and this information is fed back to the control device. The control device then adjusts the blowing air parameters accordingly, creating a closed-loop system that ensures mechanical stability is maintained while allowing for high productivity.
2Stability of the object's composition
If cooling air flow is increased to maintain temperature stability, then the deformation behavior becomes unpredictable due to interference factors like wear and tear
Solution Approach 1:
The patent uses feedback control by continuously measuring the actual temperature of the hollow glass article and comparing it with the desired temperature profile. The control device adjusts cooling air flow based on this feedback, compensating for interference factors such as wear and tear, and ensuring consistent deformation behavior throughout the forming process.
Solution Approach 2:
The patent dynamically changes the parameters of cooling air flow (volume flow, pressure, temperature) based on the measured actual temperature and the specific stage of the forming process. This allows the system to maintain temperature stability while adapting to changing conditions, ensuring reliable and consistent deformation behavior.
3Stability of the object's composition
If manual adjustment of blowing and cooling air parameters is used to account for temperature variations, then the mechanical stability improves, but the complexity of operation increases
Solution Approach 1:
The patent implements a self-regulating system where the control device automatically adjusts blowing and cooling air parameters based on real-time temperature measurements. The system monitors its own operation and makes necessary adjustments without requiring manual intervention, thereby maintaining mechanical stability while simplifying operation.
Solution Approach 2:
The automated feedback control system eliminates the need for manual adjustment by continuously monitoring temperature and automatically modifying air parameters. This reduces operational complexity while maintaining the mechanical stability that would otherwise require constant manual attention.
4Manufacturing precision
If the blowing process is extended to ensure complete shaping, then the productivity decreases, but the manufacturing precision improves
Solution Approach 1:
The patent uses dynamic control to adjust blowing air parameters in real-time based on the actual temperature and deformation state of the hollow glass article. This allows the system to achieve complete and precise shaping without unnecessarily extending the blowing process duration, thereby maintaining high production speed while ensuring manufacturing precision.
Solution Approach 2:
The system dynamically changes blowing air parameters (pressure, volume flow, temperature) based on measured temperature and deformation progress. This enables precise control of the shaping process, ensuring complete forming without excessive duration, thus balancing manufacturing precision with productivity.
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
This approach ensures reproducible temperature conditions and mechanical stability of hollow glass articles by uniformly controlling cooling air flows and adjusting blowing and suction work, minimizing manual intervention and identifying potential errors in the glass forming process.
Implementation Method 1
A method and device that record heat loss in sections of the glass forming machine, adjusting cooling air volume flow based on setpoint values to maintain uniform temperature conditions
Implementation Method 2
the temperature of the article is not recorded in its entirety in the individual stations of the process, which is of essential importance for its deformation behavior and its mechanical stability. The blown air used for shaping both in the preform and in the finished form always exerts a cooling effect in addition to a shaping effect and decisively determines the temperature at which the article is located.
Data Source
AI summary
To achieve reproducible operating parameters for the forming process of an IS glass forming machine, a central control system for all blowing and cooling air flows is proposed. This system uses a measuring device (51, 52) to record the volume flow of the cooling air, including its inlet and outlet temperatures, according to specific sections, and to determine the heat loss associated with each section. The heat extracted in this way is compared with standard values. If tolerance limits are exceeded, the volume flow is adjusted by controlling throttles (53, 54). All sections of the glass forming machine designated for cooling air are monitored in this manner, based on a measurable heat loss. This results in uniform cooling conditions that conform to a mathematical model and, consequently, reproducible product quality.