Load Lock Chambers for Continuous Metal Powder Atmosphere Control

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Solution Overview

Problem

Existing metal powder manufacturing systems in additive manufacturing face limitations due to batch-based feed and product removal processes, which disrupt the controlled atmosphere and impose lot size restrictions, necessitating a continuous feed and product removal method without atmosphere disturbance.

Innovation Solution

A load lock system with a feed chamber, process chamber, and collection chamber, utilizing gate and discharge valves to maintain controlled atmospheres, enabling continuous feed and product removal processes, and a novel discharge valve design for seamless metal powder transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If batch-based feed and product removal processes are used, then the controlled atmosphere can be maintained, but the productivity and throughput are limited due to frequent interruptions

Engineering Contradiction:

Improvecontrolled atmosphere maintenanceVSAvoidthroughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system is divided into separate functional chambers (feed chamber, process chamber, collection chamber) that can operate independently. The feed chamber and collection chamber can be loaded and emptied without opening the process chamber, allowing continuous operation while maintaining atmospheric control through isolated access points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The feed chamber and collection chamber act as intermediary buffer zones between the external environment and the controlled process chamber. These intermediate chambers allow material transfer without direct exposure of the process chamber to atmospheric disturbances, enabling continuous feeding and collection.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If batch processing is used to maintain controlled atmosphere, then atmosphere stability is preserved, but the manufacturing time increases due to repeated opening and closing

Engineering Contradiction:

Improveatmosphere stabilityVSAvoidmanufacturing time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

Feed material is pre-loaded into the feed chamber before the heating process begins, and the collection chamber is positioned ready to receive product. This preliminary preparation eliminates waiting time during the critical heating phase, as materials are already in position for immediate transfer without atmosphere disruption.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system enables continuous feeding of material into the process chamber and continuous removal of product throughout the heating cycle. The feed mechanism operates continuously rather than in discrete batches, and the collection chamber can be filled continuously, eliminating idle time while maintaining atmospheric stability through sealed operations.

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If isolation valves are used for batch feeding, then atmosphere control is maintained, but lot size is limited by AMS 7002 requirements

Engineering Contradiction:

Improveatmosphere controlVSAvoidlot size

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The feed chamber serves multiple functions: it acts as a loading chamber for new material, a storage chamber during processing, and a transfer interface to the process chamber. This multi-functionality allows the system to handle continuous material flow without requiring multiple separate chambers or frequent openings, thereby enabling larger effective lot sizes while maintaining atmosphere control.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12510297B2Load lock system and method for manufacturing metal alloys and metal powder

Publication Date: 2025.12.30 CONTINUUM POWDERS CORP

AI summary

A load lock system for manufacturing a metal alloy using a feed material includes a process chamber having a controlled atmosphere, a feed chamber in flow communication with the process chamber having controlled atmosphere capabilities configured to contain a quantity of the feed material, and a collection chamber in flow communication with the process chamber having controlled atmosphere capabilities configured to collect the metal alloy manufactured in the process chamber. The system also includes a gate valve between the process chamber and the feed chamber configured to either allow passage of the feed material between the chambers, or to seal the process chamber from the feed chamber. The system also includes a discharge valve between the process chamber and the collection chamber configured to either allow passage of the metal alloy between the chambers, or to seal the process chamber from the collection chamber.