Paper Producing Apparatus Airflow Distribution Control
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Solution Overview
Problem
Existing paper producing apparatuses face challenges in stabilizing the amount of pulp component, leading to nonuniform paper thickness due to pulp component agglomerates, making it difficult to control the grammage accurately.
Innovation Solution
The apparatus includes a sieve portion with openings, a web forming portion, a sheet forming portion, and a material supply pipe system with a branch and axis driver mechanism that adjusts airflow distribution to ensure even material deposition and processing, stabilizing the pulp component distribution and achieving uniform paper thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a valve is used to control the amount of pulp component by controlling white water supply, then the pulp component amount can be controlled, but when pulp component forms agglomerates, stable control becomes difficult and paper thickness becomes nonuniform
Solution Approach 1:
The material supply pipe is divided into multiple branches (first supply pipe, second supply pipe, third supply pipe) that supply material to different regions of the sieve portion. This segmentation allows independent control of material distribution to prevent agglomerate formation and achieve uniform paper thickness.
Solution Approach 2:
The axis driver dynamically adjusts the position of the first supply pipe relative to the branch portion, enabling real-time optimization of material distribution. This dynamic adjustment compensates for variations in pulp component flow and prevents agglomerate formation, maintaining stable control of pulp component amount.
2Manufacturing precision
If material is supplied through a simple pipe system, then the device complexity is low, but material distribution becomes uneven leading to nonuniform paper thickness
Solution Approach 1:
The material supply system is segmented into multiple pipes (first supply pipe, second supply pipe, third supply pipe) with a branch portion, allowing material to be distributed to different regions of the sieve portion. This segmentation structure, while more complex than a single pipe, enables precise control of material distribution for uniform paper thickness.
Solution Approach 2:
The branch portion acts as an intermediary that distributes material from the first supply pipe to the second and third supply pipes. This intermediary structure facilitates even material distribution across the sieve portion, achieving uniform paper thickness despite the increased structural complexity.
3Manufacturing precision
If the axis of the first supply pipe is shifted relative to the branch portion, then material distribution can be optimized, but the device complexity increases due to the axis driver mechanism
Solution Approach 1:
The axis driver enables dynamic adjustment of the first supply pipe axis position relative to the branch portion. This dynamic positioning capability allows optimization of material distribution to the sieve portion, achieving uniform material deposition. The added complexity of the axis driver is justified by the significant improvement in deposition uniformity.
Solution Approach 2:
The position parameter of the first supply pipe axis is changed relative to the branch portion through the axis driver. By adjusting this geometric parameter, the material flow distribution is optimized to prevent agglomerate formation and achieve uniform paper thickness, accepting the increased 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
This solution enables the production of paper with consistent thickness and quality by controlling the airflow and material distribution, reducing the formation of agglomerates and improving the uniformity of the paper produced.
Implementation Method 1
a material supply pipe through which transport airflow containing the material is supplied to an inside of the sieve portion. The axis driver shifts an axis of one of the first supply pipe and the branch portion with respect to an axis of the other.
Data Source
AI summary
A paper producing apparatus includes: a sieve portion having a plurality of openings; a web forming portion having a deposition surface on which a material passing through the openings and containing fibers is deposited, the web forming portion forming a web on the deposition surface; a sheet forming portion that processes the web into a sheet; and a material supply pipe through which transport airflow containing the material is supplied to an inside of the sieve portion.