Press Roller Recesses Vacuum Suction Fiber Web Drying
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Solution Overview
Problem
Centrifugal forces often lead to uneven moistening or irrigation of fiber webs after the press gap in existing fiber web production devices, causing unwanted watering issues.
Innovation Solution
A pressure roller with recesses on its outer surface that lead to cavities, equipped with a vacuum generation unit to create a vacuum in these cavities, directing suction effectively to prevent liquid escape and enhance drying efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a pressure roller is used to press the fiber web, then the fiber web can be dewatered, but centrifugal forces cause uneven moistening or irrigation of the fiber web after the press gap
Solution Approach 1:
The pressure roller surface is segmented into multiple recesses that lead to separate cavities, allowing localized vacuum control in different regions of the press gap, which prevents uneven moisture distribution while maintaining effective dewatering
Solution Approach 2:
A vacuum generation unit creates negative pressure in the cavities of the pressure roller, using pneumatic forces to control fluid removal and prevent centrifugal irrigation of the fiber web, thereby achieving uniform drying
2Quantity of substance
If vacuum suction is applied to remove liquid, then fluid removal is enhanced, but the device complexity increases
Solution Approach 1:
The vacuum generation unit is integrated with the pressure roller structure, merging the suction function into the existing pressing mechanism. The recesses and cavities are formed as part of the roller body, eliminating the need for separate external vacuum chambers and reducing 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 effectively prevents unwanted watering of the fiber web by optimizing the pressing process through targeted suction, ensuring uniform drying and improved fluid removal.
Implementation Method 1
a vacuum generation unit (17) is provided, by means of which vacuum generation unit (17) a vacuum can be produced in the at least one cavity (16)
Implementation Method 2
directing suction effectively to prevent liquid escape and enhance drying efficiency
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a device (1) for producing a web from a fiber-containing material, in particular tissue paper, comprising at least one continuous belt (2) for supporting and transporting a fibrous web (3). Additionally, at least one press roller (5) is provided, having: a longitudinal central axis (6), a lateral surface (9), a radial direction (10) which is arranged in the direction of the longitudinal central axis (6) starting from the lateral surface (9), and a rotational direction (11), with respect to which the press roller (5) is rotatably mounted. A gap (12) is formed between the press roller (5) and the continuous belt (2) in order to press the fibrous web (3), and a press substrate (13) is provided which is guided about at least one sub-region (14) of the lateral surface (9) of the press roller (5) so as to contact same, wherein the press roller (5) comprises multiple recesses (15) on the lateral surface (9), said recesses (15) being guided to at least one cavity (16) and opening into the at least one cavity, and the cavity (16) is arranged within the press roller (5) with respect to the radial direction (10). A negative pressure-generating unit (17) is provided, by means of which a negative pressure can be produced in the at least one cavity (16).