Automated Additive Manufacturing Plate Cleaning System

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Solution Overview

Problem

Current methods for cleaning additive manufacturing trays and parts are either manually intensive, potentially hazardous for operators, or inefficient in removing non-consolidated powder, which can lead to contamination and reduced powder reuse.

Innovation Solution

A fully automated cleaning installation that includes a dry cleaning device using vibrations and shocks to separate non-consolidated powder from the tray and parts, and a wet cleaning device with ultrasonic waves to thoroughly clean the parts and trays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual cleaning methods are used, then operator flexibility and simplicity are maintained, but operator safety and cleaning efficiency deteriorate due to toxic powder inhalation risks

Engineering Contradiction:
Improvecleaning operation simplicityVSAvoidoperator exposure to toxic powder
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The cleaning system is segmented into distinct functional zones: a first cleaning zone with a first cover for initial powder removal, and a second cleaning zone with a second cover for final cleaning. This segmentation allows different cleaning methods to be applied in sequence, protecting the operator from toxic powder while maintaining operational effectiveness.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces intermediate cleaning structures (first and second covers with openings) that act as mediators between the toxic powder environment and the operator. These covers allow controlled access for cleaning while preventing direct exposure to harmful powder, thus protecting the operator without completely isolating the cleaning process.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If compressed air is used to evacuate powder, then powder removal speed increases, but powder contamination occurs due to air flow introducing new particles

Engineering Contradiction:
Improvepowder evacuation speedVSAvoidpowder contamination
Core Design Contradiction:
ProductivityVSLoss of substance

Solution Approach 1:

The patent extracts the harmful element (compressed air flow that causes contamination) from the powder evacuation process. Instead, it uses gravity-based evacuation through controlled openings and mechanical removal methods that do not introduce contaminating air flows, thus removing powder efficiently without contamination.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs disposable or easily replaceable cleaning elements (such as brushes or disposable cleaning pads) that can be discarded after use, avoiding the need for complex cleaning of reusable components and preventing cross-contamination from reused tools.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Loss of substance

If gravity-based powder evacuation is used, then powder contamination is avoided, but cleaning completeness deteriorates due to insufficient removal of fine particles

Engineering Contradiction:
Improvepowder purity during evacuationVSAvoidcleaning completeness
Core Design Contradiction:
Loss of substanceVSManufacturing precision

Solution Approach 1:

The cleaning process is segmented into multiple stages: initial gravity-based evacuation for bulk powder removal, followed by secondary cleaning methods (such as suction or mechanical cleaning) for fine particles. This segmentation ensures both powder purity during evacuation and complete cleaning of all particle sizes.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements continuous cleaning action through multiple sequential steps rather than a single evacuation method. The process continues from gravity evacuation through to final fine particle removal, ensuring complete cleaning while maintaining powder purity throughout the continuous process.

Inventive Principle:
Principle #20Continuity of useful action

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 automated system effectively recovers and reuses non-consolidated powder without altering it, ensures complete removal of powder from parts and trays, and maintains a protective atmosphere to prevent contamination and health risks.

Implementation Method 1

a dry cleaning device (32) making it possible to clean a tray (10) using vibrations and shocks

Methodology Applied
Scientific EffectVibration: Vibration

Implementation Method 2

a dry cleaning device (32) making it possible to clean a tray (10) using vibrations and shocks

Methodology Applied
Scientific EffectShock: Impact Force

Implementation Method 3

a wet cleaning device (34) making it possible to clean a tray (10) using at least one liquid

Methodology Applied
Scientific EffectUltrasonic vibration: Ultrasonic Vibration

Data Source

PatentEP3328559B1Unit for cleaning additive manufacturing plates
Publication Date: 2025.03.19 ADDUP
  • EP3328559B1 patent drawingFigure 1~5
  • EP3328559B1 patent drawingFigure 2
  • EP3328559B1 patent drawingFigure 3

AI summary

The invention relates to a unit (20) for cleaning a plate (10) used for powder-based additive manufacturing, said unit (20) comprising an airlock entry (22) for receiving a plate (10) to be cleaned, and an airlock exit (26) for removing a cleaned plate (10) from the unit. The unit (20) comprises: a dry-cleaning device (32) for cleaning a plate (10) by means of vibration and shock in a first containment chamber (E32), a wet-cleaning device (34) for cleaning a plate (10) using a liquid in a second containment chamber (E34), and at least one conveyor device (44, 46) for transporting a plate (10) between the dry-cleaning chamber (E32), the wet-cleaning chamber (E34) and the airlock exit (26) from the unit.