Flexible Textile Build Sheet for Additive Manufacturing
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Solution Overview
Problem
Large-scale additive manufacturing faces challenges in providing a suitable print surface that ensures strong adhesion during printing without causing deformation or damage, and is difficult to set up and reuse, leading to print defects due to thermal contraction and stress buildup between layers.
Innovation Solution
A build sheet with a flexible textile-based surface layer and a seal layer is used, providing controlled adhesion and easy separation, allowing for gradual stress relief and preventing abrupt deformation, while also being easy to attach and detach from the print substrate without damaging the object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong adhesion is used between print surface and initial layers, then layers are held in place without sliding, but stress buildup during thermal contraction causes abrupt deformation and printing errors
Solution Approach 1:
The build sheet uses a flexible textile material that can dynamically adapt its adhesion characteristics. The fabric's inherent flexibility allows it to accommodate thermal contraction stresses through gradual deformation rather than rigid resistance, preventing abrupt layer deformation while maintaining sufficient adhesion to hold layers in place during printing.
Solution Approach 2:
The build sheet utilizes the textile material's phase transition properties near its melting point to dynamically adjust adhesion strength. As the printed object cools and contracts, the build sheet's material properties change, allowing controlled stress relief that prevents deformation while maintaining print accuracy.
2Reliability
If existing print surfaces are used, then adhesion can be achieved, but setup time and labor are excessive and reuse is difficult
Solution Approach 1:
The build sheet is designed as a disposable or easily replaceable component. Made from inexpensive textile material, it can be quickly attached to the build plate and discarded or replaced after use, eliminating time-consuming cleanup processes and allowing rapid setup for the next print job.
Solution Approach 2:
The build sheet's material properties are selected to enable easy attachment and detachment through controlled adhesion characteristics. The textile fabric provides sufficient grip during printing but allows straightforward removal without damaging the printed object, significantly reducing setup and cleanup time.
3Ease of operation
If adhesion is too weak, then separation from object is easy, but print surface cannot prevent layers from shifting or sliding
Solution Approach 1:
The flexible textile build sheet dynamically maintains adhesion throughout the printing process, holding layers firmly in position. The material's flexibility allows it to conform to the printed object's shape while maintaining consistent contact, ensuring precise layer positioning without requiring strong chemical adhesion that would complicate removal.
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 ensures reliable adhesion during printing, prevents deformation and damage, and allows for easy reuse of the build sheet, improving print quality and reducing the effort required for setup and cleanup.
Implementation Method 1
The print surface needs to hold onto the initial printing layers without allowing the layers to slide
Implementation Method 2
as the 3D object thermally contracts or expands
Implementation Method 3
allowing for gradual stress relief and preventing abrupt deformation
Implementation Method 4
adhesion between the print surface and the initial printed layers is appropriate
Data Source
AI summary
Methods and apparatus for additive manufacturing. In a method for additive manufacturing, a build sheet can be positioned on a print substrate of a printer. An object can be printed on the build sheet. The object can be detached from the build sheet. Advantageously, the build sheet can prevent the object from shifting on the build sheet during printing. Removing the build sheet from the object does not result in significant deformation or bending of the object. Damage to the object can be prevented. The object does not require additional cleaning or finishing for removing any residual or material. The build sheet can be ready for reuse. The build sheet can advantageously have mechanical strength to sustain removal of the build sheet from the object.