Mixer Beater Blade Geometry for Uniform Planetary Mixing
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Solution Overview
Problem
Commercial food mixers, particularly planetary-type mixers, face challenges in achieving efficient mixing patterns that ensure uniformity and reduce material accumulation at the vessel walls, as existing beater designs do not effectively combine rotational, radial, and axial movements to optimize mixing efficiency.
Innovation Solution
The beater design features a shaft with stabilizing arms and blades that transition from vertical to angled orientations, creating a mixing pattern where material moves upward along outer blades and inward/downward along inner blades, combining rotational, radial, and axial movements to enhance mixing efficiency and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional beater designs are used, then the structure is simple, but mixing efficiency and uniformity are insufficient
Solution Approach 1:
The beater is segmented into multiple functional components: a central shaft, multiple stabilizing arms extending radially outward, and multiple blades attached to each stabilizing arm. This segmentation allows each component to perform specific functions (rotation, stability, material movement) thereby improving mixing efficiency while maintaining manageable structural complexity through modular design
Solution Approach 2:
The blade geometry incorporates three-dimensional curvature with leading faces that transition from substantially vertical orientation at the lower end to downwardly angled orientation at the upper end. This dimensional change creates complex fluid flow patterns including upward, inward, and downward material movement, enhancing mixing efficiency by engaging material throughout the mixing volume rather than simple planar motion
2Stability of the object's composition
If conventional beater designs are used, then material accumulation at vessel walls occurs, but achieving uniform mixing patterns requires complex blade configurations
Solution Approach 1:
The blades are configured with asymmetric geometry where the leading face transitions from vertical to downwardly angled orientation, and multiple blades are positioned at different circumferential locations on stabilizing arms. This asymmetric configuration creates non-uniform flow patterns that prevent material accumulation at vessel walls by continuously redistributing material throughout the mixing volume
Solution Approach 2:
Multiple stabilizing arms extend radially outward from the shaft at different circumferential positions, acting as counterbalancing elements. This counterweight arrangement ensures stable rotational motion while the blades attached to these arms create opposing flow patterns that prevent material from accumulating at any single location, particularly at the vessel walls
3Loss of time
If mixing time is reduced for initial uniformity, then productivity increases, but material settling and accumulation problems worsen
Solution Approach 1:
The beater design ensures continuous useful action through multiple blades on multiple stabilizing arms that simultaneously engage material throughout the mixing volume. The blade geometry creates continuous upward, inward, and downward flow patterns that prevent material settling and accumulation while achieving initial uniformity quickly, maintaining effective mixing action throughout the entire mixing process rather than intermittent action
Data Source
AI summary
A beater for a mixer includes a shaft including a mixer attachment portion, the shaft defining a rotational axis of the beater. A first stabilizing arm extends outwardly from the shaft and a second stabilizing arm extends outwardly from the shaft and spaced circumferentially from the first stabilizing arm. A first blade has an upper end connected to the first stabilizing arm at a location spaced from the shaft, a lower end located proximate the rotational axis of the beater and a leading face that transitions from a substantially vertical orientation at the lower end to a downwardly angled orientation at the upper end. A second blade has an upper end connected to the second stabilizing arm at a location spaced from the shaft, a lower end located proximate the rotational axis of the beater and a leading face that transitions from a substantially vertical orientation at the lower end to a downwardly angled orientation at the upper end.