Melt Grid Temperature Control for Polymer Reservoir Level
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Solution Overview
Problem
Conventional melting systems face challenges with off-board storage requirements, limited control over the melting rate of solid polymers, and issues with material bridging, leading to inefficiencies and potential system failures due to vapor accumulation and clogs.
Innovation Solution
A melt system with onboard storage and a control system that adjusts the melt grid's temperature based on real-time molten material levels in the reservoir, using sensors to determine the fill rate and set points, allowing for precise control over the melting process and preventing material bridging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If off-board storage is used for solid polymer, then the melt grid can process material continuously, but the system requires increased floor space and complex air conveyance systems
Solution Approach 1:
The patent combines the solid polymer storage function with the melt grid assembly by positioning the hopper directly above the melt grid. This integration eliminates the need for separate off-board storage containers and complex air conveyance systems, while still enabling continuous processing through the onboard hopper supply.
2Productivity
If off-board storage is used for solid polymer, then the melt grid can process material continuously, but the system requires increased floor space
Solution Approach 1:
The patent merges the storage and processing functions into a single compact assembly. The hopper is positioned directly above the melt grid, allowing solid polymer to be stored and processed within the same spatial footprint, thereby eliminating the need for additional floor space that would be required for separate off-board storage containers.
3Productivity
If the melt grid temperature is increased to melt solid polymer, then the melting rate increases, but vapor accumulation and clogs occur
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the level of molten material in the reservoir and adjusts the melt grid temperature accordingly. When the reservoir level is low, the temperature is increased to enhance melting; when the level is sufficient, the temperature is reduced to prevent excessive vapor generation and material clogging, thus maintaining optimal melting rate while preventing harmful effects.
4Ease of operation
If the hopper is filled manually, then the system is simple to operate, but the solid polymer may form bridges and starve the melt grid
Solution Approach 1:
The patent employs a vibration mechanism that is activated when the hopper is filled or when material flow is detected to be stagnant. This preliminary action of applying mechanical vibration prevents solid polymer from forming bridges and ensures continuous flow of material to the melt grid, thereby maintaining reliability without complicating the manual filling operation.
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
Enables efficient, real-time control over the melting process, preventing material bridging and vapor accumulation, allowing for on-board storage of solid polymers and improving system reliability by maintaining optimal molten material levels.
Implementation Method 1
a melt grid disposed between the hopper and the reservoir for heating the solid polymer into the molten material
Implementation Method 2
The melt grid exposes solid polymer material stored in the hopper to an elevated temperature, which converts the polymer material into a melted liquid
Implementation Method 3
a pump coupled to reservoir, and an applicator coupled to the pump
Implementation Method 4
The melted liquid is gravity fed to the reservoir
Data Source
AI summary
A method and system for controlling a level of molten material received in a reservoir of a melt system from a melt grid is disclosed. The method includes receiving a first level of the molten material from a sensor in the reservoir at a first time, receiving a second level of the molten material from the sensor at a second time subsequent to the first time, and comparing the second level of the molten material to a desired operating level to determine a difference between the second level and the desired operating level. The method also includes determining a temperature set point for the melt grid based on at least the difference between the second level and the desired operating level, and adjusting an operating temperature of the melt grid to match the temperature set point.