Collision-Guided Fiber Web Formation for Uniform Sheet Thickness
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Solution Overview
Problem
Existing sheet manufacturing apparatuses face challenges in reducing thickness variation in the web, particularly in the width direction, leading to uneven sheet quality.
Innovation Solution
The apparatus incorporates a supply section, collision section, and accumulation section, along with a control system that adjusts airflow to manage the flow of fibers, using a supply member with a reducer, collision, and duct sections to rectify the flow, and a sensor system to monitor and adjust airflow for consistent thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If material is supplied from above the center in the width direction of the rotating body, then the material can be unraveled and accumulated to form a web, but the variation in thickness of the web increases in the width direction
Solution Approach 1:
The invention introduces a collision section that changes the spatial dimension of material flow by directing material from vertical supply to horizontal collision, then to the accumulation section. This dimensional transition redistributes material more evenly across the web width, reducing thickness variation while maintaining web formation capability.
Solution Approach 2:
The collision section acts as an intermediary between the supply section and accumulation section. It receives material from the supply section, processes it through collision, and then directs it to the accumulation section. This intermediary function enables better control over material distribution and thickness uniformity.
2Productivity
If a rotating body is used to unravel and accumulate material, then continuous web production is achieved, but thickness variation occurs particularly in wide webs
Solution Approach 1:
The invention divides the web formation process into distinct segments: supply section, collision section, and accumulation section. Each segment performs a specific function - material supply, material redistribution through collision, and controlled accumulation. This segmentation allows optimization of each stage to achieve both continuous production and thickness consistency.
Solution Approach 2:
By introducing the collision section that operates in a different spatial dimension and redirects material flow, the invention achieves more uniform material distribution across the web width while maintaining continuous production through the rotating body mechanism.
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 configuration significantly reduces thickness variation in the web, ensuring uniformity and improving the quality of the manufactured sheets by stabilizing the fiber flow and distribution.
Implementation Method 1
a collision section with which the material moving from the supply section collides
Data Source
AI summary
A sheet manufacturing apparatus includes a pipe that supplies a material containing fibers, a collision section with which the material moving from the pipe collides, and an accumulation section that is disposed downstream of the collision section and accumulates the material to form a web.