Movable Side Walls for 3D Printers
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Solution Overview
Problem
Large 3D printing machines face challenges in achieving precise positioning of the building platform due to bending torques and frictional forces, leading to inaccuracies in component production, as existing solutions either restrict material choice or result in overly massive designs.
Innovation Solution
A build container with movable side walls that match the speed of the building platform, reducing kinetic friction and using flexible or segmented walls with antifriction coatings to minimize forces and deformations, thereby maintaining component accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the building platform is reinforced to resist bending torques, then the structural strength is improved, but the device weight increases and positioning accuracy deteriorates
Solution Approach 1:
The side walls are made movable rather than fixed, allowing them to dynamically adapt to the growing powder load. This dynamic design reduces the static reinforcement needed while maintaining positioning accuracy through coordinated movement with the building platform.
Solution Approach 2:
The side walls transition from a static rigid structure to a dynamic adjustable structure that changes position during the building process. This parameter change allows the system to maintain strength requirements while reducing the mass that would otherwise degrade positioning accuracy.
2Stability of the object's composition
If the side walls are made stationary, then the structural stability is improved, but the frictional forces increase causing positioning errors
Solution Approach 1:
The side walls are designed to move dynamically with the building platform, eliminating relative motion and friction between them. This dynamic coordination maintains structural stability while preventing friction-induced positioning errors.
Solution Approach 2:
The movable side walls act as intermediaries between the stationary machine frame and the building platform. By moving with the platform, they mediate the forces and eliminate direct frictional contact that would cause positioning errors.
3Productivity
If the building platform is lowered continuously, then the productivity is improved, but the bending torques increase causing deformations
Solution Approach 1:
The side walls move dynamically with the building platform during the lowering process, distributing and reducing the bending torques that would otherwise cause deformations. This enables continuous operation while maintaining dimensional accuracy.
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 allows for high-quality component production with reduced frictional forces, enhancing the accuracy and reducing unnecessary machine downtime by maintaining component alignment with CAD data.
Implementation Method 1
the kinetic friction between the constructed layers and the side walls is reduced or essentially avoided
Implementation Method 2
using flexible or segmented walls with antifriction coatings to minimize forces and deformations
Data Source
AI summary
The invention relates to a system for producing three-dimensional models. The system preferably includes a z-axis drive unit on a side of a build container that is coupled to a build platform for moving the build platform in a vertical direction.