Web Transfer Suction Device for Secure Roll Feeding
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Solution Overview
Problem
The transfer of a paper web from a wound roll to a following machine unit in slitter winders is time-consuming and prone to failure due to manual guidance, requiring a more efficient and secure method.
Innovation Solution
A suction device grips the material web, a separating device creates a transfer strip that wraps around a guide element, and the web is deflected at an angle to ensure secure transfer, with optional suction rollers and pressurized fluid cutting, and a conveyor device with suctioned sections to stabilize the web.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual feeding of material web is used, then operation simplicity is maintained, but productivity is reduced and reliability deteriorates due to time-consuming manual guidance and malfunctions
Solution Approach 1:
A transfer strip is introduced as an intermediary element between the winding roll and the conveying device. The transfer strip is separated from the material web, wrapped around a guide element, and transferred to the conveying device, enabling automated web transfer without direct mechanical contact between the winding roll and conveyor systems.
Solution Approach 2:
The patent replaces manual mechanical feeding with an automated system using suction devices to capture and hold the web start, a separating device (laser, mechanical cutter, or water jet) to create the transfer strip, and a conveying device with suction sections to transfer and guide the web automatically.
2Reliability
If the material web is deflected at a large angle at the guide element, then web tension is improved, but the transfer strip separation from the rest of the material web becomes difficult
Solution Approach 1:
The guide element has a specific geometric design with a defined wrap angle (less than 180°) and curvature that is optimized locally at the transfer strip region. This local geometric configuration enables both adequate web tension and clean separation of the transfer strip from the main material web by creating different wrapping angles - the transfer strip wraps less than the rest of the material web.
3Ease of operation
If the suction device is brought into contact with the winding roller, then web capture is facilitated, but the risk of web damage or misalignment increases
Solution Approach 1:
A suction device (suction roller or suction plate) is used to capture the web start through negative pressure instead of mechanical clamping or gripping. This pneumatic approach provides gentle yet secure holding of the web material, reducing the risk of web damage, misalignment, or slippage during the transfer process.
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 method enables quick and secure web transfer with improved web tension and reduced risk of failure, facilitating efficient feeding of paper or cardboard webs to subsequent machine units.
Implementation Method 1
capturing the beginning of the material web with a suction device
Implementation Method 2
Cutting can be performed mechanically, by laser, or by means of a pressure fluid such as water or air
Data Source
Figure 1
AI summary
The invention relates to a method for transferring the material web (1) of a winding roll (2) to a following machine unit. This is intended to occur in a simple and secure manner by virtue of the fact that the start of the material web (1) is grasped by a suction device (3), the suction device (3) with the material web (1) is moved away from the winding roll (2), a transfer strip (5) is separated from the material web (1) by a separating device (4) arranged between the winding roll (2) and the moved-away suction device (3), and this transfer strip (5) is fed to a conveying device (6).