Chain-Type Roller Coating with Lift Control to Prevent Roller Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roller coating apparatuses for silicon wafers in solar cell production suffer from deformation of the liquid coating roller due to improper adjustment of the liquid squeezing roller's pressure, leading to reduced effectiveness and shortened lifespan.
Innovation Solution
A chain-type roller coating apparatus with a synchronizing wheel and lifting driving devices to adjust the position of the liquid coating roller, allowing controlled pressure and separation from the squeezing roller, preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the liquid coating roller is kept in contact with the liquid squeezing roller during operation, then the liquid dopant source can be continuously transferred to the coating roller, but the coating roller undergoes serious deformation after shutdown due to prolonged local squeezing
Solution Approach 1:
The patent applies the dynamics principle by making the contact between the liquid coating roller and liquid squeezing roller adjustable rather than fixed. The lifting mechanism enables the system to transition between a contact state during operation (for continuous coating) and a separated state during shutdown (to prevent deformation), thus adapting the mechanical relationship dynamically to operational requirements
Solution Approach 2:
The patent applies preliminary anti-action by designing the lifting mechanism to separate the coating roller from the squeezing roller before shutdown occurs. This preventive measure eliminates the prolonged local squeezing condition that would otherwise cause deformation, addressing the potential harm before it can affect service life
2Reliability
If the liquid coating roller is separated from the liquid squeezing roller, then deformation is prevented, but the liquid dopant source transfer becomes unstable
Solution Approach 1:
The system dynamically adjusts the contact state between rollers based on operational phase. During normal operation, the rollers are in contact to ensure stable dopant transfer. During shutdown or maintenance, the lifting mechanism separates them to prevent deformation. This dynamic adaptation resolves the contradiction by applying the appropriate contact state to the appropriate operational context
3Device complexity
If a fixed-position roller coating apparatus is used, then the structure is simple, but the coating roller cannot be adjusted to prevent deformation
Solution Approach 1:
The patent introduces a lifting mechanism that adds dynamic adjustability to the roller positioning system. This allows the coating roller to be moved vertically to change its contact state with the squeezing roller, providing the ability to prevent deformation while maintaining operational effectiveness, thus resolving the contradiction between structural simplicity and functional adaptability
Data Source
AI summary
The present application provides a chain-type roller coating apparatus, including a liquid coating roller and a synchronizing wheel. The synchronizing wheel is provided with a mounting hole. A proximity switch is arranged on an outer side of the synchronizing wheel. The synchronizing wheel is further provided with a trigger element which is configured to be sensed by the proximity switch. The liquid coating roller is assembled with the mounting hole of the synchronizing wheel by a connecting shaft. A shaft main body of the connecting shaft is equipped with a rotation support device configured to support a rotation of the shaft main body. The rotation support device is equipped with a first lifting driving device configured to drive the rotation support device to ascend or descend vertically. A ranging sensor is arranged exactly above the liquid coating roller.