Multi-Angle Radiation Emitters for Uniform 3D Sintering

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Solution Overview

Problem

Existing 3D printing methods using particulate materials face limitations in achieving high strength and efficiency due to the constraints of bulk density and process-related issues, particularly in high-speed sintering processes, which affect the quality and productivity of manufactured parts.

Innovation Solution

A radiation-emitting set with multiple units mounted at defined angles and combined with cooling means, allowing for adjustable radiation intensity and uniform temperature distribution across the construction field, optimized by varying angles and cooling mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If high radiation intensity is used to increase sintering speed, then productivity improves, but temperature control becomes difficult and energy waste increases

Engineering Contradiction:

Improvesintering speedVSAvoidtemperature control

Core Design Contradiction:

ProductivityVSTemperature

Solution Approach 1:

The radiation emitter is divided into multiple independently controllable radiation units along the movement direction. Each unit can be controlled separately, allowing selective activation and intensity adjustment. This segmentation enables precise temperature control while maintaining high overall sintering speed, as only necessary regions are irradiated at high intensity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radiation emitter is designed to move relative to the particulate material layer, and the radiation intensity of individual units can be dynamically adjusted based on real-time process conditions. This dynamic control allows optimization of sintering speed while preventing overheating and energy waste in already-sintered regions.

Inventive Principle:

Principle #15Dynamics

2Productivity

If radiation emitter operates continuously at high intensity, then sintering speed increases, but energy consumption increases

Engineering Contradiction:

Improvesintering speedVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The radiation units are activated in periodic sequences rather than continuously. As the emitter moves over the particulate layer, different units are activated in succession, creating a periodic irradiation pattern. This allows high sintering speed while reducing total energy consumption by avoiding redundant irradiation of already-sintered areas.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Different radiation units can operate at different intensity levels tailored to local requirements. Regions requiring faster sintering receive higher intensity, while other regions receive lower intensity or no irradiation. This local optimization reduces overall energy consumption while maintaining high productivity in critical areas.

Inventive Principle:

Principle #3Local quality

3Device complexity

If single-angle radiation emitters are used, then device complexity is reduced, but manufacturing precision deteriorates due to edge effects

Engineering Contradiction:

Improveemitter structureVSAvoidtemperature uniformity

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The radiation units are arranged at different angles relative to the particulate material surface, creating an asymmetric configuration. This asymmetric multi-angle arrangement ensures uniform radiation distribution across the entire build area, eliminating edge effects and achieving consistent temperature uniformity without requiring overly complex individual emitter designs.

Inventive Principle:

Principle #4Asymmetry

4Manufacturing precision

If multiple radiation units with different angles are used, then manufacturing precision improves, but device complexity increases

Engineering Contradiction:

Improvetemperature uniformityVSAvoidemitter structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Multiple radiation units with different angles are merged into a single integrated emitter assembly that moves together. This unified structure achieves uniform temperature distribution through multi-angle irradiation while avoiding the complexity of multiple separate emitter systems. The units share common support and control infrastructure, reducing overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

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

Enhances the quality and mechanical stability of 3D printed parts by improving temperature control and energy efficiency, reducing material consumption and production time, while minimizing edge effects and energy waste.

Implementation Method 1

solidification of the particulate material is effected by input of infrared radiation. The particulate material is thus bonded physically by a fusing process

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 2

the radiation-emitting units are combined with one or more cooling means

Methodology Applied

Scientific EffectCooling: Cooling

Data Source

PatentUS12434432B2Method and apparatus for producing 3D shaped articles using high-performance radiation emitters

Publication Date: 2025.10.07 VOXELJET AG

AI summary

The invention relates to a method and an apparatus for producing three-dimensional models using a radiation-emitting set and optionally a specific arrangement of radiation-emitting units.