Adjustable Side Boundary Walls for Wood Fiber Scatter Control
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Solution Overview
Problem
Existing scattering systems for producing grit mats in wood-based panel production often result in inhomogeneous scatter distribution across the width of the mat, affecting the quality of the panels due to variations in density and basis weight, particularly at the edges.
Innovation Solution
The system incorporates adjustable side boundary walls controlled by actuators and a measuring device to ensure uniform scatter distribution, along with a modified leveling device featuring distributor rollers with asymmetrical blade orientations to influence the basis weight distribution, and a pendulum chute for adjusting bunker filling, allowing real-time control of the scatter distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional scattering systems are used to produce grit mats, then the production process can proceed continuously, but the scatter distribution across the mat width becomes inhomogeneous, affecting panel quality
Solution Approach 1:
The patent applies local quality by making different parts of the scattering system adjustable to achieve uniform scatter distribution. Specifically, the scattering rollers are equipped with adjustable scattering elements that can be individually positioned to optimize the scatter pattern at different locations across the mat width. This allows each local region to be tailored for optimal performance, resolving the contradiction between continuous production and uniform scatter distribution.
Solution Approach 2:
The patent implements dynamics by introducing adjustable and movable components to the scattering system. The scattering elements on the rollers can be dynamically adjusted during operation to change the scatter pattern. Additionally, the side boundary walls are made adjustable to dynamically adapt to variations in scatter distribution, enabling the system to maintain uniformity while running continuously.
2Manufacturing precision
If side boundary walls are added to delimit the grit mat laterally, then the scatter distribution at edges can be influenced, but the device complexity increases
Solution Approach 1:
The side boundary walls are designed to be adjustable rather than fixed, allowing them to be dynamically positioned to optimize edge scatter distribution. This adjustability enables precise control over edge characteristics without requiring a completely complex fixed structure, resolving the contradiction between improved edge distribution and device simplicity.
3Manufacturing precision
If a measuring device and actuators are added to automatically adjust side boundary walls, then real-time control of scatter distribution is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent implements feedback control by incorporating measuring devices that continuously monitor scatter distribution and actuators that automatically adjust side boundary walls based on measured deviations. This closed-loop feedback system enables real-time correction of scatter distribution issues, achieving high manufacturing precision while the self-regulating nature of the feedback reduces the need for complex manual control systems.
Solution Approach 2:
The automatic adjustment system enables the scattering system to self-correct scatter distribution issues without external intervention. The measuring devices detect problems and the actuators automatically make corrections, allowing the system to regulate itself and maintain optimal performance, which simplifies overall system operation despite the added components.
4Device complexity
If the scatter distribution is not uniform, then the production process remains simple, but the density distribution and homogeneity of the final panel deteriorate
Solution Approach 1:
The patent applies local quality by equipping scattering rollers with adjustable scattering elements that can be individually positioned to optimize the scatter pattern at different locations across the mat width. This ensures uniform grit distribution and consequently uniform density distribution in the final panel, achieving high manufacturing precision while maintaining relatively simple scattering system architecture.
Data Source
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AI summary
This is a spreading system for producing spreading mats from spreading material, in particular wood fibers or wood chips, in the course of the production of wood-based panels or similar panels, e.g. fiberboard or particleboard, with a spreading belt conveyor (1) on which the spreading material is spread to form the spreading mat, wherein side boundary walls (16) are arranged on the spreading belt conveyor (above the spreading belt), which laterally limit the spreading mat and can be adjusted transversely to the conveying direction (F) of the spreading belt conveyor (1) against the lateral mat edges.This system is characterized in that one or both side boundary walls (16) are adjustable with one or more actuators, and that at least one measuring device is arranged downstream of the side boundary walls (16) with which the scatter distribution over the mat width can be measured, wherein the actuators (17) for positioning the side boundary walls are controllable or regulating with a control or regulating device depending on the scatter distributions measured with the measuring device.