Additive Manufacturing Mixer for Uniform Particle Dispersion

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Solution Overview

Problem

Additive manufacturing processes are limited by non-homogeneous sedimentation or aggregation of solid components in composite mixtures, leading to quality issues in fabricated parts.

Innovation Solution

A mixer-based dispensing system for additive manufacturing that includes a fluid dispensing system, a solid particle dispensing system, and a slurry dispensing system, which are in fluidic communication with a mixer, allowing for in-line mixing and formulation of materials, including a reservoir and build plate alignment, to ensure homogeneous mixing and prevent aggregation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If solid components are added to fluid materials for composite mixing, then material performance is enhanced, but sedimentation and aggregation occur leading to non-homogeneous composition

Engineering Contradiction:

Improvematerial performanceVSAvoidhomogeneous composition

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The system performs preliminary mixing of solid components and fluid materials in a mixing chamber before dispensing, ensuring homogeneous composition is achieved in advance. The mixer actively combines particles with liquid resin or slurry to create a uniform composite mixture that prevents subsequent sedimentation during the additive manufacturing process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system maintains continuous mixing action through the mixing chamber and dispensing system, ensuring that composite materials remain homogenized throughout the entire printing process. The continuous circulation and mixing prevent particle settlement, maintaining stable composition from first layer to last layer.

Inventive Principle:

Principle #20Continuity of useful action

2Productivity

If materials are formulated and packaged before integration with printing system, then manufacturing efficiency is improved, but material property choices and stability are limited

Engineering Contradiction:

Improvemanufacturing efficiencyVSAvoidmaterial property choices

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The system dynamically adjusts material formulation during the printing process by controlling the mixing of different solid components and fluid materials in real-time. The mixing chamber allows for variable composition ratios, enabling the system to adapt material properties such as viscosity, particle concentration, and composite structure according to specific printing requirements without being constrained by pre-packaged materials.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes material parameters on-demand by adjusting the mixing ratios of solid particles and liquid resin, controlling particle size distribution, and modifying slurry composition. This enables flexible adjustment of material properties including strength, flexibility, and thermal characteristics directly within the printing system.

Inventive Principle:

Principle #35Parameter changes

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

Enables the production of articles with uniform particle dispersion and controlled gradients in mechanical, thermal, or electromagnetic properties, overcoming the limitations of sedimentation and aggregation, and allowing for tunable material properties during the printing process.

Implementation Method 1

Methodology Applied

Scientific EffectMixing: Stirring

Implementation Method 2

the solid components in a filled resin may have a density mis-match with the fluid, resulting in sedimentation. In some cases, some solid components may aggregate and prevent homogeneous material composition

Methodology Applied

Scientific EffectSedimentation prevention: Suspension

Data Source

PatentUS12441028B2Systems and methods for mixing materials for additive manufacturing

Publication Date: 2025.10.14 TETHON CORP

AI summary

Additive manufacturing apparatus and methods for mixing and dispensing materials, and articles with controlled particle concentrations. Additive manufacturing apparatus includes a mixer; a reservoir in fluidic communication with the mixer; and a build plate parallel to the reservoir. Additive manufacturing apparatus includes a mixer and a solid particle dispensing system and/or a slurry dispensing system. A method for handling precursors during additive manufacturing includes (a) providing first and second precursor materials and/or a slurry to a mixer; (b) mixing the materials in the mixer; (c) transporting the mixed materials directly to a reservoir disposed in parallel with a build plate; (d) curing at least a portion of the transported and mixed materials; and (e) repeating step (d) at least once. An article includes a plurality of adjacent layers, a concentration of particles in each layer defining a controlled concentration gradient and/or vary by no more than ±50%.