Film Coating Grip Motion for Wrinkle-Free 3D Surface Lamination
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Solution Overview
Problem
The amount of stretch in a film varies depending on the part of a coated three-dimensional work due to differences in distance between the work and the film, leading to wrinkles during coating.
Innovation Solution
A coating apparatus with a first gripping unit, a first moving unit, and a displacement unit that moves the film and work relative to each other to ensure uniform contact and reduce stretch variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the film is stretched to cover the three-dimensional work, then the film can be applied to the work surface, but the amount of stretch varies depending on the part of the work causing wrinkles
Solution Approach 1:
The gripping unit is made movable in the film conveyance direction, allowing dynamic adjustment of its position during the coating process. This enables the system to adapt to varying distances between the film and different parts of the three-dimensional work, maintaining uniform film tension and preventing wrinkles while ensuring complete coverage.
Solution Approach 2:
The gripping unit is positioned to grip the leading end of the film before the coating process begins. This preliminary gripping action establishes controlled tension in the film from the start, ensuring uniform stretch as the film is conveyed over the work surface and preventing premature wrinkling.
2Manufacturing precision
If the gripping unit remains stationary, then the device structure is simple, but the film stretch varies due to distance differences
Solution Approach 1:
The gripping unit is made movable in the film conveyance direction, allowing dynamic adjustment of its position during the coating process. This enables the system to adapt to varying distances between the film and different parts of the three-dimensional work, maintaining uniform film tension and preventing wrinkles while ensuring complete coverage.
3Productivity
If the film is conveyed directly over the work, then the coating process is fast, but wrinkles occur due to uneven stretch
Solution Approach 1:
The gripping unit moves in the film conveyance direction in coordination with the film conveyance process, allowing the system to maintain uniform film tension throughout the coating operation. This dynamic adjustment prevents wrinkles while enabling continuous coating at high speed, resolving the conflict between productivity and coating quality.
Data Source
AI summary
A coating apparatus including: a first gripping unit configured to grip a leading end of a film; a first moving unit configured to be capable of moving the first gripping unit in a first direction in which the film is conveyed above a work to be coated and a second direction opposite to the first direction; and a displacement unit configured to displace the first gripping unit and the work to be coated relative to each other such that the film comes into contact with the work to be coated, wherein after the film and the work to be coated start to come into contact, before full contact is made, the first gripping unit moves in the second direction.