Intermeshing Screw Rotor Distributor for Consistent Portioning
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Solution Overview
Problem
Existing distributor apparatuses in the food industry face challenges in accurately and consistently dividing filling materials into portions of required volume, leading to potential underfilling or overfilling, which can result in complaints, recalls, and increased costs, while also requiring easy cleaning to maintain hygiene.
Innovation Solution
The apparatus features a chamber with inter-engaging rotors having helical lobes that rotate in opposite directions, ensuring consistent material flow without a line of sight between them, allowing for precise division and easy disassembly for cleaning, with adjustable outlets and rotors that can be driven by material flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a distributor apparatus is designed to accurately divide filling material into consistent portions, then manufacturing precision and reliability improve, but device complexity increases due to the need for precise rotor configurations and intermeshing mechanisms
Solution Approach 1:
The rotor is segmented into multiple lobes (typically three lobes per rotor) that are spaced evenly around the rotor circumference. Each lobe creates a discrete portioning space when intermeshing with the other rotor, dividing the continuous filling material flow into consistent discrete portions. This segmentation enables precise volume control while maintaining a relatively simple overall rotor structure.
Solution Approach 2:
The two rotors are designed with asymmetric lobe configurations relative to each other, where the lobes of one rotor intermesh with the spaces between lobes of the other rotor. This asymmetric arrangement creates the necessary void spaces for material containment and portioning while ensuring consistent volumetric division. The asymmetric design allows the rotors to be driven in opposite directions, improving material flow control.
2Ease of operation
If the rotor design ensures thorough cleaning capability for hygiene maintenance, then ease of operation improves, but device complexity increases due to disassembly requirements
Solution Approach 1:
The rotor assembly is segmented into separable components including the rotors themselves, the housing, and the drive mechanism. This segmentation allows each component to be individually removed and cleaned, ensuring thorough hygiene maintenance. The rotors can be detached from the housing for complete access to all surfaces that contact filling material, while the modular design keeps the overall structure relatively simple.
Solution Approach 2:
The rotors are designed to be extractable from the housing for cleaning purposes. The rotor mounting structure includes removable fasteners or mounting mechanisms that allow the rotors to be completely extracted from the distributor apparatus. This extraction capability enables thorough cleaning of all rotor surfaces and the internal chamber, while the taking-out design adds minimal complexity to the overall structure.
3Reliability
If the apparatus provides accurate material distribution to prevent underfilling and overfilling, then reliability improves, but loss of substance increases due to potential material waste during operation
Solution Approach 1:
The intermeshing rotor design creates continuous portioning action as the rotors rotate, with material being continuously divided and distributed through the interlobe spaces. This continuous action ensures consistent portion volumes without interruption or pulsing, improving filling accuracy and reducing waste from overfilling or underfilling corrections. The continuous operation maintains steady material flow through the distributor.
Solution Approach 2:
The lobe geometry parameters (lobe count, lobe spacing, lobe depth) are specifically designed to optimize portion volume consistency. By carefully controlling these geometric parameters, the apparatus achieves reliable and accurate portioning. The parameter optimization ensures that material is precisely contained within defined volumes during rotation, minimizing variability in portion sizes and reducing material waste from inconsistent filling.
Data Source
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AI summary
Distributor apparatus (10) for distributing a plurality of portions or streams of a flowable material comprising an enclosure (16) which locates interengaging rotors (48, 50). An inlet port (66) is provided in an upper part of the enclosure (16), which connects to a manifold (34) with five spaced inlets (36) through which material can pass to drive the rotors (48, 50). Material can pass round the rotors (48, 50) to a plurality of spaced outlets (38) for discharging to and from the apparatus (10).