Inflation Molding Viscosity Estimation for Film Breakage Prediction
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Solution Overview
Problem
Existing inflation molding devices struggle with inefficient commercial value due to unpredictable film breakage during changes in molding conditions, leading to decreased work efficiency and material waste, and lack accurate stress and viscosity distribution estimation, resulting in poor breakage prediction.
Innovation Solution
The device incorporates a viscosity estimation unit, temperature identification unit, and parameter estimation unit to estimate viscosity and stress distribution of the molding material, using temperature and pressure data to predict potential film breakage and optimize molding conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If molding conditions are changed in existing inflation molding devices, then production flexibility is improved, but film breakage occurs leading to decreased work efficiency and material waste
Solution Approach 1:
The system performs preliminary estimation of stress distribution and viscosity parameters before actual molding occurs. By using the stress estimation unit and viscosity estimation unit to predict potential breakage conditions in advance, the system can prevent film breakage before it happens, maintaining productivity while allowing molding condition changes.
Solution Approach 2:
The parameter estimation unit continuously monitors and estimates viscosity parameters based on temperature and stress data, providing feedback control. This feedback mechanism allows the system to adapt to changing molding conditions while maintaining optimal parameters to prevent film breakage, thus improving both flexibility and productivity.
2Adaptability or versatility
If molding conditions are changed, then production flexibility is improved, but material waste increases due to film breakage
Solution Approach 1:
The stress estimation unit estimates stress distribution before molding occurs, allowing preliminary identification of potential breakage conditions. This preliminary action enables adjustment of molding parameters to avoid film breakage and material waste while maintaining flexibility in molding conditions.
Solution Approach 2:
The viscosity estimation unit provides continuous feedback on material viscosity parameters based on temperature and stress conditions. This feedback allows real-time adjustment to prevent film breakage and material waste when molding conditions change, reducing loss of substance while maintaining adaptability.
3Measurement precision
If stress and viscosity estimation is implemented, then breakage prediction accuracy is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical measurement systems with computational estimation methods. The stress estimation unit and viscosity estimation unit use calculations based on temperature and material properties rather than direct physical measurements, achieving high breakage prediction accuracy while minimizing additional device complexity.
Solution Approach 2:
The parameter estimation unit acts as an intermediary that processes temperature data and stress information to estimate viscosity parameters. This intermediary approach simplifies the overall system by using software-based estimation rather than requiring complex hardware sensors for direct stress and viscosity measurement.
Data Source
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AI summary
An inflation molding device includes a viscosity estimation unit 144 that estimates a viscosity of a molding material discharged in a substantially cylindrical shape from a die, a temperature identification unit 145 that identifies a temperature of the molding material, and a parameter estimation unit 146 that estimates a viscosity parameter of the molding material based on the viscosity estimated by the viscosity estimation unit 144 and the temperature identified by the temperature identification unit 145.