Dispersion Installation Braking Roller Chute for Uniform Grit Distribution
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Solution Overview
Problem
Existing grit systems for producing wood-based panels face challenges in achieving uniform and high-quality grit distribution on the scattering belt conveyor, leading to inconsistencies in the production of grit mats, particularly for thin boards like MDF.
Innovation Solution
Incorporating a braking roller device with rotating, spaced-apart rollers within the chute above the grit bunker entrance, combined with a pendulum chute, to slow down and distribute fibers evenly, preventing compaction and ensuring a homogeneous filling of the bunker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If grit enters the bunker unbraked via the chute, then the throughput is high, but the grit compacts upon impact reducing distribution quality
Solution Approach 1:
The braking rollers act as an intermediary element between the chute and bunker. These rollers gently decelerate the falling grit before it enters the bunker, preventing direct impact and compaction. The rollers transfer the kinetic energy of the falling grit into rotational motion, serving as a mediator that protects the grit from harmful impact while maintaining continuous flow.
Solution Approach 2:
The braking rollers change the velocity parameter of the falling grit. By converting the high-speed falling grit into slower-moving material that is being transported by the rollers, the system modifies the speed parameter to prevent compaction. This parameter change occurs progressively as grit moves along the braking rollers, transforming the impact scenario into a controlled transport process.
2Productivity
If the grit bunker is filled quickly, then productivity increases, but uniform distribution of grit on the spreading belt is compromised
Solution Approach 1:
The braking rollers serve as an intermediary that decouples the filling speed from the distribution quality. They receive high-speed incoming grit and progressively reduce its velocity while maintaining continuous material flow. This intermediary function allows quick filling without sacrificing distribution uniformity, as the rollers control the grit's entry into the bunker and subsequent release onto the spreading belt.
Solution Approach 2:
The braking rollers perform preliminary action by pre-decelerating and pre-distributing the grit before it enters the bunker. This preliminary deceleration and distribution preparation ensures that when grit is quickly filled, it already has reduced velocity and better distribution characteristics, preventing compaction and ensuring uniformity downstream on the spreading belt.
3Manufacturing precision
If braking rollers are arranged close together, then compaction is prevented, but the device complexity increases
Solution Approach 1:
Multiple braking rollers are merged into a single continuous braking zone within the chute. Rather than treating each roller as a separate complex unit, they are combined into an integrated braking system that works together. This merging approach prevents compaction through the cumulative effect of multiple rollers while presenting a unified, manageable structure that reduces 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
This solution results in even grit distribution on the spreading belt conveyor, enhancing the quality of the produced grit mats and subsequently the fiber boards, especially for thin wood-based panels by maintaining a loose and homogeneous filling.
Implementation Method 1
at least one braking roller device (11) is arranged within the chute (5) assigned to the filling opening (4) (in the fiber flow), which has at least two rotatingly driven braking rollers (12)... reduces the speed of the fibers falling through the chute
Implementation Method 2
ensures a turbulence or distribution of the fibers, so that compaction of the grit, which can occur when the grit hits the bunker, is reliably avoided
Data Source
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AI summary
The invention relates to a dispersion installation for dispersing dispersible material on a dispersing material conveyor belt so as to form groups of material for producing wood-material boards. Said system comprises at least one dispersion material bunker for the dispersible material dispersed on the dispersing material conveyor belt, having at least one top side filling opening. A chute is connected to the filling opening via which the dispersible material can enter into the dispersion material bunker. The invention is characterised in that at least one brake cylinder device is arranged inside the chute, said brake cylinder comprising at least two rotationally driven brake cylinders.