Air Turn Bar and Hood Stabilize Contact-Free Sheet Turning
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Solution Overview
Problem
There is a risk that a strip-shaped sheet may come into contact with the air turn bar during turning back, leading to potential damage and reduced product quality.
Innovation Solution
A sheet conveyor apparatus with an air turn bar and a hood is designed, where the air turn bar ejects air through holes onto one surface of the sheet and the hood suctions air from the other surface, stabilizing the turning process and reducing contact with the turn bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air is ejected from the air turn bar toward one surface of the sheet, then the sheet can be turned back, but the sheet may come into contact with the air turn bar causing damage
Solution Approach 1:
The patent introduces a hood as an intermediary component that surrounds the air turn bar. The hood includes suction holes that draw air from the other surface of the sheet, creating a controlled airflow field between the sheet and the air turn bar. This intermediary airflow structure prevents direct contact between the sheet and the air turn bar, eliminating the harmful contact damage while maintaining the turning function.
Solution Approach 2:
The patent utilizes pneumatic principles by employing both ejection holes in the air turn bar and suction holes in the hood to control airflow. The ejection holes blow air toward one surface of the sheet to enable turning, while the suction holes simultaneously draw air from the other surface, creating a balanced pneumatic field that stabilizes the sheet during turning and prevents contact with the air turn bar.
2Stability of the object's composition
If the sheet is turned back using only ejection holes, then the turning action is simple, but the sheet turning is unstable and contact occurs
Solution Approach 1:
The hood acts as an intermediary structure that introduces suction holes to create a dual airflow system. This intermediary mechanism stabilizes the sheet during turning by controlling airflow from both surfaces, preventing unstable motion and contact with the air turn bar.
Solution Approach 2:
The patent changes the airflow parameters by introducing suction in addition to ejection. The suction holes in the hood create a negative pressure field that balances the positive pressure from the ejection holes, resulting in controlled and stable airflow parameters that ensure stable sheet turning without contact.
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
The apparatus ensures stable turning of the sheet without contact with the air turn bar, improving product quality by minimizing damage and fluttering, and allowing for a longer conveyance passage in a limited space.
Implementation Method 1
The outer circumferential surface of the air turn bar includes ejection holes ejecting air toward one surface of the sheet
Implementation Method 2
The inner circumferential surface of the hood includes suction holes sucking air from the other surface of the sheet
Data Source
AI summary
A sheet conveyor apparatus includes an air turn bar and a hood. The air turn bar turns back a strip-shaped sheet conveyed along a predetermined conveyance passage. The hood includes an inner circumferential surface that opposes an outer circumferential surface of the air turn bar. The outer circumferential surface of the air turn bar includes ejection holes ejecting air toward one surface of the sheet. The inner circumferential surface of the hood includes suction holes sucking air from the other surface of the sheet.