Web Forming Device Inclined Suction Gaps Uniform Deposition
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Solution Overview
Problem
Existing sheet manufacturing apparatuses face issues with uneven deposition of mixtures on mesh belts due to non-uniform suction, leading to inconsistent web thickness and quality.
Innovation Solution
A web forming device with a suction mechanism featuring inclined surfaces and gaps that increase air wind speed, ensuring uniform airflow and collection of the mixture, preventing deposition and achieving uniform web formation on the mesh belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a suction mechanism is used to deposit mixture on mesh belt, then web formation is enabled, but the mixture may stay in the suction mechanism and deposition becomes uneven
Solution Approach 1:
The suction mechanism is segmented into multiple suction ports distributed across the housing portion, allowing the mixture to be suctioned from multiple locations simultaneously. This prevents mixture accumulation in any single area and ensures uniform deposition across the entire web formation area.
Solution Approach 2:
The suction ports are arranged in multiple dimensions within the housing portion, creating a three-dimensional suction field that efficiently captures the mixture as it falls through the mesh belt. This multi-dimensional arrangement prevents dead zones where mixture could accumulate.
2Productivity
If suction speed is increased to improve web formation efficiency, then productivity increases, but mixture may not be uniformly sucked and deposition becomes uneven
Solution Approach 1:
The high-speed suction process is divided into multiple parallel suction operations through the distributed suction ports. Each port operates at high speed, but the collective effect across all ports maintains uniform deposition by simultaneously capturing mixture from different locations.
Solution Approach 2:
Each suction port is strategically positioned to handle local mixture deposition patterns, with varying suction characteristics optimized for their specific locations. This ensures that high-speed suction maintains uniformity across the entire web formation area despite local variations in mixture flow.
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 suction and deposition of the mixture, stabilizing sheet quality by preventing mixture accumulation and promoting consistent airflow, resulting in a uniformly deposited web on the mesh belt.
Implementation Method 1
a suction portion that sucks air in the housing portion
Implementation Method 2
when the suction portion sucks the air, the wind speed at the first gap and the second gap is high. Hence, the mixture that falls to the first gap and the second gap passes through the first gap and the second gap at a high speed
Data Source
AI summary
A housing portion includes first and second inclined surfaces facing each other and inclined such that a distance between the first and second inclined surfaces decreases downward in a vertical direction. A third inclined surface located between the first and second inclined surfaces, facing the first inclined surface, inclined such that a distance between the third and first inclined surfaces decreases downward in the vertical direction, and having a first gap with respect to the first inclined surface is provided. A fourth inclined surface located between the first and second inclined surfaces, facing the second inclined surface, inclined such that a distance between the fourth and second inclined surfaces decreases downward in the vertical direction, and having a second gap with respect to the second inclined surface is provided. A suction blower causes a mixture to pass through the first and second gaps, and collects the mixture.