Rotatable Gap-Forming Elements for High-Throughput Mixing

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Solution Overview

Problem

Existing mixing and dispersing devices in the paint industry face challenges with low throughput and frequent blockages due to the design of separating devices, which limits the efficiency and reliability of the dispersing process.

Innovation Solution

A device with rotatable gap-forming elements, including a rotor and stator, is designed to create a dynamic gap for mixing and dispersing materials, preventing larger particles from passing through while allowing high throughput without the risk of blockages, using a housing with dynamic gaps and grinding tools to ensure efficient dispersion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a separating device with small gaps is used to prevent larger particles from passing through, then particle separation is improved, but the throughput is reduced and blockage probability increases

Engineering Contradiction:
Improveparticle separationVSAvoidthroughput
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The separating device is divided into multiple gap-forming elements with openings arranged in specific patterns. Instead of a single small gap, multiple gaps are created in series, allowing progressive separation while maintaining higher throughput. The segmentation of the separation function across multiple elements prevents blockages while achieving the required particle separation precision.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The gap-forming elements are designed with rotatable components that create dynamic gaps. The relative rotation between gap-forming elements allows the gap size to vary during operation, preventing material buildup and blockages while maintaining effective separation. This dynamic adjustment enables continuous operation at high throughput without the stagnation issues of static small gaps.

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If a separating device with small gaps is used to separate grinding aids, then separation precision is improved, but the device becomes prone to blockages requiring frequent maintenance

Engineering Contradiction:
Improveseparation precisionVSAvoidblockage resistance
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The rotating gap-forming elements create continuously varying gap sizes that prevent material from settling and blocking the separation paths. The dynamic motion ensures that no single small gap remains stationary long enough to accumulate blocking material, thereby maintaining high separation precision while significantly improving reliability and reducing maintenance frequency.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The continuous rotation of gap-forming elements ensures that the separation action is constantly renewed across all gaps. This continuous motion prevents the formation of stationary blockages by ensuring that material is constantly being moved and separated, rather than allowing accumulation in any single location. The useful separation action continues without interruption or blockage.

Inventive Principle:
Principle #20Continuity of useful action

3Device complexity

If the number of outlet gaps is reduced to simplify the device, then device complexity is reduced, but the throughput is greatly limited

Engineering Contradiction:
Improvedevice simplicityVSAvoidthroughput
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

Instead of using a single complex separating device with many outlets, the invention segments the separation function across multiple gap-forming elements with openings. This segmentation allows the device to maintain structural simplicity while achieving high throughput through the cumulative effect of multiple gaps working in series, rather than requiring a single complex outlet structure.

Inventive Principle:
Principle #1Segmentation

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

The solution enables high-throughput material processing without blockages, ensuring efficient dispersion and separation of grinding aids, reducing maintenance needs and improving the overall efficiency of the dispersing process.

Implementation Method 1

a first gap-forming element, preferably a rotor, which is assigned to the first process region and comprises openings, a second gap-forming element, preferably a stator, which is assigned to the second process region and corresponds to the first gap-forming element, wherein the second gap-forming element comprises openings, wherein at least one of the gap-forming elements, preferably the rotor, is designed so as to be rotatable about an axis of rotation relative to the other gap-forming element

Methodology Applied
Scientific EffectDynamic gap formation:

Implementation Method 2

an inlet through which the liquid with the material to be treated and the dispersion medium are sucked in as a result of rotation of the agitating disk

Methodology Applied
Scientific EffectCentrifugal force: Centrifugal Force

Data Source

PatentUS11059004B2Device and method for mixing, in particular dispersing
Publication Date: 2021.07.13 BUHLER AG
  • US11059004B2 patent drawing
  • US11059004B2 patent drawing
  • US11059004B2 patent drawing

AI summary

A device (1) for mixing which comprises a housing (2) with at least one inlet (3). A first process region (4) mixes the supplied substances which are introduced via the inlet (3) while a second process region (5) discharges the mixture via an outlet (6). A first gap-forming element (7), preferably a rotor, is assigned to the first process region (4) and comprises openings (8), and a second gap-forming element (9), preferably a stator, is assigned to the second process region (5) and corresponds with the first gap-forming element (7), wherein the second gap-forming element (9) comprises openings (10). At least one of the gap-forming elements (7, 9) is rotatable relative to the other gap-forming element (7, 9). The openings (8, 10) of the first and second gap-forming elements (7, 9) are arranged such that a mixture passes through the openings from the first into the second process region.