Circular Feed Channel for Bulk Material Dosing
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Solution Overview
Problem
Existing metering devices for bulk materials, such as granules and powders, face issues with dead zones and material adherence due to their design, leading to obstructed flow and inefficient conveying, especially with light and poor-flowing materials.
Innovation Solution
A metering device with a circular, cylindrical feed channel and a frustoconical sealing body for the conveyor screw, ensuring seamless connection and preventing material rest, along with a cylindrical continuation of the feed channel below the screw for easy emptying and quick cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a square or approximately square housing design with flange connection is used, then the connection structure is simple, but dead zones form in which nests can obstruct material flow
Solution Approach 1:
The patent replaces the square housing design with a circular housing that has a semicircular cross-section. This curved geometry eliminates dead zones and nests that form in square designs, ensuring smooth material flow through the feed channel without obstructions.
2Reliability
If a bearing for the conveyor screw projects into the vertical feed channel, then the screw is supported, but bulk material can come to rest on or adhere to it obstructing passage
Solution Approach 1:
The bearing is designed with a semicircular cross-section that matches the circular feed channel geometry. This curved design prevents material from accumulating on the bearing surface, eliminating adhesion and obstruction problems while maintaining proper screw support.
3Loss of time
If the feed channel is emptied quickly, then cleaning time is reduced, but material must be prevented from resting in dead zones during operation
Solution Approach 1:
The entirely circular feed channel design with semicular cross-section eliminates dead zones where material could accumulate during operation. This ensures continuous material flow while enabling rapid complete emptying during cleaning cycles.
Solution Approach 2:
The circular geometry serves dual purposes: preventing material accumulation during operation and enabling rapid complete emptying during cleaning, achieving both continuous operation and efficient maintenance.
Data Source
AI summary
The invention relates to a metering device for supplying devices such as, for example, extruders, injection molding machines or the like with bulk materials such as pellets, chips, granules, powders, flakes, grains, flour or the like, having a housing. It is demonstrated how an optimally smooth passage of such bulk materials through such a metering device is possible without there being any possibility of nests forming and throughflow being hindered in the feed channel.