Multi-Zone Preform Heating for Consistent Container Deformation
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Solution Overview
Problem
Existing methods for heating preforms in container production suffer from imprecise temperature regulation, leading to inadequate control over the deformation process due to reliance on a single reference temperature measurement, which affects the accuracy of heating power distribution.
Innovation Solution
A method that adjusts the heating power of each heating element based on real-time temperature measurements of specific areas of the preform, ensuring precise application of the required temperature profile by comparing measured temperatures with target heating temperatures and modifying the power levels accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single reference temperature measurement is used to regulate heating power, then the regulation process is simple, but the temperature control precision for distant areas deteriorates
Solution Approach 1:
The patent divides the preform body into multiple heated areas along the preform axis, with each area equipped with its own temperature sensor. This segmentation allows independent temperature measurement and control for each zone, resolving the contradiction by enabling precise local control while maintaining overall system simplicity through modular zone-based management.
Solution Approach 2:
The patent implements local temperature sensing and control for each heated area, allowing the heating power to be adjusted according to the specific temperature requirements of each zone. This local quality approach ensures that distant areas receive appropriate heating power based on their actual temperature conditions, improving precision without complicating the overall regulation process.
2Device complexity
If heating power is regulated based on reference temperature in one area, then the control system is simple, but the temperature profile accuracy for multiple areas deteriorates
Solution Approach 1:
The patent segments the temperature control system into multiple independent zones, each with its own sensor and control mechanism. This allows the temperature profile accuracy for multiple areas to be maintained while keeping the overall control system relatively simple through standardized modular units that can be independently managed.
Solution Approach 2:
The patent implements feedback control for each heated area by measuring the actual temperature and adjusting the heating power accordingly. This feedback mechanism ensures accurate temperature profile application across all areas while maintaining system simplicity through automated closed-loop control that eliminates the need for complex manual adjustment mechanisms.
3Measurement precision
If multiple temperature sensors are deployed in different areas, then the temperature control precision improves, but the system complexity increases
Solution Approach 1:
The patent divides the system into standardized temperature control zones, each with a single sensor and heating element. This segmentation approach improves measurement precision by providing localized temperature data while minimizing system complexity through repetitive modular units that follow a consistent design pattern, making the system easier to manage despite having multiple sensors.
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 allows for precise regulation of heating elements, ensuring that each area of the preform reaches the desired temperature, thereby improving the accuracy and consistency of the deformation process.
Implementation Method 1
heating the body of a first preform of the succession of preforms by means of at least two heating elements, with each heating element heating a different heated area of the body of the first preform along the preform axis
Data Source
AI summary
Provided is a method for heating a succession of preforms. The method includes heating a body of a first preform using two heating elements that each heat a heated area of the body. The method includes determining a target heating temperature for each heated area according to the container to be produced, measuring the temperature of one of the heated areas of the body upon completion of the heating step, and modifying the heating power of the heating element corresponding to the heated area of the body if the measured temperature of the heated area is different from the target heating temperature. The method further includes heating the body of the other preforms of the succession of preforms with the modified heating power.