Window Cutout Removal Using Suction Roller and Carrier Web
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Solution Overview
Problem
Existing methods for making window cutouts in frame materials for membrane electrode units face challenges in reliably detaching and removing punching chads during the delamination process, as they must overcome both adhesive effects and inherent stiffness, leading to potential creasing or air inclusions.
Innovation Solution
An apparatus and method utilizing a rotatable roller with suction openings connected to a vacuum device to detach and transport punching chads from the carrier web, ensuring they are removed without cutting through the carrier web, using a combination of contour cuts and suction forces to facilitate efficient detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If punching chads are removed during delamination of the protective film, then the protective film can serve dual purposes (protection and chad removal), but the adhesive effect must overcome both carrier web adhesion and chad stiffness, risking frame material damage
Solution Approach 1:
The process is segmented into two distinct stages: first, window cutouts are punched in the frame material while the protective film remains intact providing support; second, the protective film is delaminated separately to remove punching chads. This segmentation allows each operation to be optimized independently, preventing frame material damage during chad removal.
Solution Approach 2:
The protective film is applied to the frame material before punching operations. This preliminary action provides structural support and stability during the punching process, preventing frame material damage. The film is then removed in a controlled manner after punching is complete.
2Object-affected harmful factors
If punching chads are left on the carrier web, then the CCM is protected, but the carrier web and adhesive system must handle additional load and complexity
Solution Approach 1:
The punching chads are extracted and removed from the carrier web in a controlled manner during the protective film delamination process. The vacuum detachment device selectively removes only the chads while leaving the frame material and carrier web intact, simplifying the overall system by eliminating the need for complex adhesive systems designed to handle chad retention.
3Stability of the object's composition
If frame material is applied to counter-element before protective film delamination, then sufficient stability is ensured, but additional processing steps and materials are required
Solution Approach 1:
The protective film is applied to the frame material before punching and processing operations. This preliminary protective layer provides the necessary stability and support throughout the manufacturing process, eliminating the need for additional counter-elements or stabilization measures, thereby maintaining high productivity.
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
This solution enables reliable detachment and removal of punching chads, preventing creasing or air inclusions by applying a controlled suction force, ensuring the stability of the frame material and efficient processing.
Implementation Method 1
the vacuum device is configured to apply a suction force to the punching chad via the suction opening as the roller rotates in order to detach the punching chad from the carrier web by use of the suction force and to transport it away from the material combination using the roller
Data Source
AI summary
The invention relates to an apparatus and a method for making window cutouts (22) in a frame material (20) in web form for a membrane electrode unit, wherein, at least in some section or sections, the frame material (20) is processed as a material combination with a carrier web (30), wherein a contour cut (50) that cuts through the frame material (20) is made in the frame material (20) from an opposite side of the frame material (20) to the carrier web (30), while forming a punching chad (201), wherein the contour cut (50) is made without cutting through the carrier web (30), wherein the punching chad (201) is separated from the material combination using a rotatable roller (40, 40a) having a suction opening (402), wherein a suction force is applied to the punching chad (201) via the suction opening (402), with the result that the punching chad (201) is detached from the carrier web (30) by use of the suction force and transported away from the material combination using the roller (40, 40a). The invention furthermore relates to the use of a rotatable roller in making window cutouts.