Material Web Reference Marks for Hidden Forming Element Alignment
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Solution Overview
Problem
In web processing, accurately positioning material webs relative to shaped elements is challenging when these elements are covered by product components or process station parts, hindering precise processing steps such as punching operations.
Innovation Solution
Generating reference marks on the material web during the introduction or application of shaped elements allows for precise positioning of the material web relative to these elements, using an optical sensor system to detect these marks and align process stations without directly detecting the covered shaped elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shaped elements are introduced into or applied to the material web for each product, then manufacturing precision is improved, but the shaped elements are covered by product components or process station parts making them undetectable
Solution Approach 1:
The patent creates reference marks that are detectable copies or proxies for the shaped elements. These reference marks are generated when the shaped element is introduced or applied, and they serve as detectable representations that allow the system to determine the position and orientation of the shaped element without directly detecting the shaped element itself. This resolves the contradiction by providing detectable indicators (reference marks) that correspond to the non-detectable shaped elements.
Solution Approach 2:
The reference marks act as intermediaries between the shaped elements and the sensor system. Instead of the sensor system directly detecting the shaped elements (which are covered and undetectable), the sensor system detects the reference marks, which then provide information about the shaped element's position. This intermediary approach allows indirect detection and positioning despite the shaped elements being obscured.
2Manufacturing precision
If sensor systems are positioned to detect shaped elements, then positioning accuracy is improved, but the sensors must be repositioned when manufacturing products of different sizes
Solution Approach 1:
The sensor system is designed to detect reference marks rather than shaped elements directly. Since the reference marks are generated in a consistent manner when shaped elements are introduced, the sensor system can detect reference marks for different product sizes using the same positioning and detection methodology. This universal detection approach eliminates the need to reposition sensors when changing product sizes, as the reference marks provide consistent detectable features regardless of the final product dimensions.
3Productivity
If blanks are placed on window cutouts and punching operations are performed, then product manufacturing is achieved, but both blanks and process station parts obscure the window cutouts preventing direct detection
Solution Approach 1:
The reference marks are generated when the shaped elements (window cutouts) are introduced into the material web, before the blanks are placed and before the punching operations are performed. This preliminary creation of detectable reference marks allows the system to capture the position information of the window cutouts before they become obscured by subsequent process components, enabling accurate positioning for subsequent operations despite the eventual obscuration.
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
Enables precise positioning of material webs regardless of the position or size of mold elements or products, facilitating accurate processing steps like placing blanks, connecting webs, and creating punched contours without repositioning sensors, even when manufacturing products of different sizes.
Implementation Method 1
using an optical sensor system to detect these marks and align process stations
Data Source
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AI summary
The invention relates to a method and a device for the positionally accurate processing of a material web in a web processing process for the serial production of products, in particular for the production of membrane assemblies, wherein a forming element (2) is introduced into the material web (1) or a forming element (2) is applied to the material web (1), wherein when the forming element (2) is introduced into or applied to the material web, several reference marks (3) per product are generated, and in a subsequent process step for positionally accurate processing of the material web (1) relative to the forming element (2) of a product, the position of at least one of the several reference marks (3) of this product and/or at least one of the several reference marks (3) of a subsequent and/or a preceding product is detected.