Sheet Mold Transfer Device Tension Control
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Solution Overview
Problem
Conventional sheet-shaped mold conveying/positioning devices face issues with maintaining the flat shape and preventing loosening or cutting of the mold during the peeling process, which can inhibit smooth operation and lead to transfer failures.
Innovation Solution
A conveying/positioning device that includes an unused-mold placing device, a mold rolling-up device, and a tension maintaining device to keep the sheet-shaped mold flat and prevent loosening, using a roller and air cylinder to apply constant tension, ensuring the mold remains stable during peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sheet-shaped mold is peeled from the molding target, then the transfer is completed, but the mold may change form, loosen, or cut
Solution Approach 1:
The tension maintaining device applies preliminary counteracting force to prevent the mold from loosening or changing form during peeling. The device maintains constant tension on the mold throughout the peeling process, counteracting the forces that would otherwise cause form changes or cutting.
Solution Approach 2:
The mold rolling-up device prepares the mold in advance by rolling it up after peeling, preventing form changes before they occur. The tension maintaining device is activated during peeling to maintain mold stability proactively rather than reactively.
2Shape
If the mold is kept under constant tension, then the flat shape is maintained, but the device complexity increases
Solution Approach 1:
The tension maintaining device uses a cylinder (pneumatic or hydraulic) to generate and control tension forces. This allows for simple, reliable tension application without complex mechanical linkages, maintaining the mold's flat shape through fluid-powered actuation.
Solution Approach 2:
The system controls the tension parameter dynamically during the peeling process. The tension force is adjusted as needed to maintain the mold's flat shape while preventing over-tensioning that could cause cutting, optimizing the balance between shape maintenance and safety.
Data Source
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AI summary
A conveying/positioning device includes: a unused-mold placing device 9 that places a rolled mold MB of a sheet-shaped mold M thereon; a mold rolling-up device 11 that rolls up the flat sheet-shaped mold MA supplied from the unused-mold placing device 9; and a tension maintaining device that constantly maintains a tension of the flat sheet-shaped mold even if a form of the flat sheet-shaped mold is changed when the peeling is performed.