Vacuum Hood Web Transfer Device for Uniform Edge Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing web transfer devices in continuous web process lines often result in non-uniform leading and trailing edges during the cutting and transfer of webs from a full core to a new core, leading to waste and inefficiencies, particularly with self-wound-adhesive webs and expensive materials.
Innovation Solution
A web transfer device equipped with a vacuum hood assembly that includes movable suction holding surfaces and a cutting device, allowing for precise cutting and transfer of the web from a full core to a new core, ensuring uniform edges and minimizing waste through a method involving stopping the web, holding it with suction, cutting, releasing the trailing edge, and securing the leading edge to the new core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pressure roll is used to transfer the web from a full core to a new core, then the web transfer can be performed in a continuous mode, but the cutting device leaves non-uniform leading edges and trailing edges
Solution Approach 1:
The invention employs a vacuum hood assembly that uses vacuum pressure to hold and transfer the web. The vacuum hood creates a vacuum field that securely grasps the web material, allowing for precise positioning and uniform cutting edges during the transfer process from full core to new core, thereby resolving the precision issue while maintaining continuous operation capability
2Device complexity
If the cutting device creates non-uniform edges, then the web transfer process is simpler, but web material is wasted due to non-uniform web build up
Solution Approach 1:
The vacuum hood assembly uses controlled vacuum pressure to hold the web uniformly during cutting, ensuring that the leading and trailing edges are straight and uniform. This prevents the need to remove portions of the web later, thereby eliminating material waste while maintaining a relatively simple transfer process
3Manufacturing precision
If a vacuum hood assembly is used to hold the web, then uniform leading and trailing edges are achieved, but the device complexity increases
Solution Approach 1:
The invention combines the vacuum hood assembly with the existing pressure roll and cutting device into an integrated web transfer system. The vacuum hood is positioned to work in conjunction with the pressure roll that applies adhesive, and the cutting device that creates uniform edges, thereby achieving precision without proportionally increasing overall device complexity
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 solution ensures uniform web transfer, reducing waste and improving the efficiency of the web transfer process by maintaining the integrity of the web material, especially valuable for self-wound-adhesive and expensive materials.
Implementation Method 1
The vacuum hood has one or more suction holding surfaces that are configured to releasably hold a portion of the web
Data Source
AI summary
A web transfer device for a multiple turret winder on a continuous web process line includes a web delivery assembly having delivery rolls and a core transfer assembly having one or more core receiving structures. The transfer device includes a web transfer assembly configured to receive a web from the web delivery assembly and configured to communicate with the core transfer assembly. The web transfer assembly includes a frame and lay-on roll moveably positioned relative to the frame. The web transfer assembly includes a vacuum hood moveably positioned relative to the frame. The vacuum hood has a cutting device mounted therein and one or more suction holding surfaces that are configured to releasably hold a portion of the web. The suction holding surfaces are movable relative to the frame and the core receiving structures. The suction holding surfaces communicate with the core receiving structures to transfer the web thereto.