Rotational Moulding Control Using Thermal and Motion-Time Programs
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Solution Overview
Problem
Current rotational moulding systems face challenges in achieving economically viable large-scale production of consistent quality products due to variations in resin properties and manufacturing conditions, leading to issues with reproducibility and compliance with desired thermal characteristics.
Innovation Solution
A system and method that integrate a mould heating and cooling system with the mould wall, a motion system, and a control system to determine and adjust temperature-time and motion-time programs based on predetermined thermal characteristics of the raw material, using sensors for real-time feedback and a database for efficient program determination and improvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional rotational moulding systems are used without integrated control, then device complexity is reduced, but manufacturing precision and quality consistency deteriorate due to variations in resin properties and manufacturing conditions
Solution Approach 1:
The patent combines the heating system, cooling system, motion system, and control system into an integrated rotational moulding system. The heating and cooling systems are integrated with the mould wall, and all systems are coordinated through a central control system that uses sensors and databases to determine and adjust temperature-time and motion-time programs, achieving quality consistency through unified control.
Solution Approach 2:
The control system serves multiple functions: it controls heating, cooling, motion, and uses sensor feedback for real-time adjustment. It also manages the database for program determination and improvement, making it a multi-functional system that addresses various aspects of the moulding process through a single integrated controller.
2Manufacturing precision
If real-time feedback control is implemented, then manufacturing precision improves through optimization of moulding parameters, but device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The patent implements feedback control through sensors that collect real-time data during the rotational moulding process. The control system evaluates this feedback and adjusts the temperature-time and motion-time programs accordingly, improving reproducibility by aligning actual process parameters with the desired thermal characteristics of the raw material.
Solution Approach 2:
The system uses sensor feedback to automatically adjust its own operating parameters without external intervention. The control system evaluates collected feedback and determines adjustments to the temperature-time and motion-time programs, enabling the system to self-optimize the moulding process for consistent quality.
3Manufacturing precision
If integrated heating and cooling systems are embedded in the mould wall, then manufacturing precision improves through better temperature control, but device complexity and ease of manufacture worsen due to integration requirements
Solution Approach 1:
The heating and cooling systems are integrated directly into the mould wall structure, combining thermal control functions with the mould itself. This integration allows for precise temperature control during the moulding process, ensuring the moulding parameters align with the thermal characteristics of the raw material.
4Productivity
If automated program determination based on thermal characteristics is implemented, then productivity improves through simplified configuration, but device complexity increases due to database and algorithm requirements
Solution Approach 1:
The system stores predetermined rotational moulding thermal characteristics for different raw materials in a database before the actual moulding process. When a material is selected, the control system retrieves the corresponding thermal characteristics and automatically determines the appropriate temperature-time and motion-time programs, eliminating the need for manual configuration and improving 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 enables real-time adjustment and optimization of the moulding process, improving the quality and reproducibility of rotationally moulded products by aligning the moulding parameters with the specific thermal characteristics of the raw material, thus enhancing the consistency and efficiency of the rotational moulding process.
Implementation Method 1
a mould heating and cooling system at least partly integrated with the mould wall and provided for applying a temperature-time program to the mould
Implementation Method 2
a mould heating and cooling system at least partly integrated with the mould wall and provided for applying a temperature-time program to the mould
Implementation Method 3
a motion system to which the mould is connectable and provided for applying a motion-time program to the mould
Data Source
AI summary
Rotational moulding system configured for determining at least one suitable temperature-time program and at least one suitable motion-time program for the rotational moulding of an object by means of the rotational moulding system on the basis of a predetermined rotational moulding thermal characteristic of a raw material to be used for the rotational moulding of the object. Computer-implemented method for using the rotational moulding system.