Continuous Flexible Feedstock Line with Protective Covering
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Solution Overview
Problem
In additive manufacturing, feedstock materials such as glutinous substances, fibers, and uncured resins often cause clogging and handling difficulties due to their properties, leading to operational issues with print heads.
Innovation Solution
A continuous flexible feedstock line with a releasably coupled covering that provides rigidity and protection, allowing for easier handling and storage, and a system with a covering-removal mechanism to prevent premature curing and exposure to environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the feedstock material is uncured or partially cured resin, then the material remains flexible and easy to process, but the resin gradually cures inside the print head causing clogging and obstruction
Solution Approach 1:
The patent applies preliminary action by pre-coating the feedstock line with a releaseable covering before it enters the print head. This covering prevents premature curing and maintains the feedstock in a handleable state until deposition, thereby preventing clogging while preserving handling ease.
Solution Approach 2:
The releaseable covering acts as an intermediary between the uncured resin and the environment (oxygen, UV light). It mediates the curing process by preventing premature reaction while allowing controlled deposition, thus protecting the print head from clogging without sacrificing the flexibility benefits of uncured material.
2Strength
If the feedstock material includes elongate fibers, then the material gains structural strength, but the fibers may kink, break, or buckle causing damage and clogging
Solution Approach 1:
The patent uses a flexible thin film covering that envelops the fiber-containing feedstock line. This flexible shell protects the embedded fibers from mechanical damage (kinking, breaking, buckling) during handling and storage, while allowing the feedstock to be easily manipulated and fed into the print head without compromising fiber integrity.
3Strength
If the feedstock material is glutinous, then the material achieves desired bonding properties, but the material gums up and clogs the print head
Solution Approach 1:
The patent extracts the harmful glutinous properties from the feedstock by applying a releaseable covering that prevents the glutinous material from contacting and adhering to the print head surfaces. The covering is removed only at the deposition point, allowing the glutinous material to bond properly to the workpiece while preventing clogging during transport.
4Ease of operation
If a covering is applied to protect the feedstock line, then handling and storage are improved, but the covering must be removed before deposition adding process complexity
Solution Approach 1:
The patent implements self-service by designing a feedstock line where the covering is automatically removed by the deposition process itself. The heat or mechanical action required for deposition simultaneously removes the covering, eliminating the need for separate removal mechanisms and reducing overall system complexity while maintaining handling benefits.
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 efficient handling and processing of challenging feedstock materials, preventing clogging and premature curing, thus enhancing the reliability and efficiency of the additive manufacturing process.
Implementation Method 1
the continuous flexible line may be at least partially constructed of a material that is configured to cure responsive to exposure to electromagnetic radiation or ambient air. In such examples, the covering may shield the continuous flexible line from such exposure.
Implementation Method 2
the continuous flexible line may be at least partially constructed of a material that is configured to cure responsive to exposure to electromagnetic radiation or ambient air
Data Source
AI summary
A method of additively manufacturing an object comprises feeding a feedstock line into a delivery guide. The feedstock line has a length and comprises a continuous flexible line. The continuous flexible line has a peripheral surface. The feedstock line further comprises a covering, releasably coupled to the peripheral surface of the continuous flexible line. The method also comprises removing the covering from the peripheral surface of the continuous flexible line before the continuous flexible line is deposited along a print path and depositing the continuous flexible line along the print path using the delivery guide.