Parallel Kinematic Ejection Mechanism for 3D Printing Part Removal
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Solution Overview
Problem
Current 3D printer designs lack portability, reliability, and safety features, often experiencing print jams, unreliable heating elements, and inadequate access to printed parts while exposing users to potential injury and printer damage.
Innovation Solution
A compact, modular, and portable 3D printing system with a parallel kinematic linkage for automatic part ejection, featuring a unique interface and mechanisms to prevent user injury and protect internal components, utilizing a compact ejection mechanism with a parallel linkage to transfer motion into horizontal movement for automatic part removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stationary 3D printing system is used, then printing reliability can be maintained, but portability is lost
Solution Approach 1:
The 3D printing system is divided into separate functional modules including a removable build platform, detachable ejection mechanism, and modular housing. This segmentation allows the system to maintain printing reliability through standardized connection interfaces while enabling portability by allowing disassembly and relocation of individual components.
2Productivity
If manual part removal is used, then device complexity is reduced, but productivity decreases due to interruptions
Solution Approach 1:
The ejection mechanism is designed to automatically remove printed parts from the build platform without requiring manual intervention. The system uses sensors to detect when printing is complete and automatically activates the ejection mechanism, enabling continuous manufacturing operations while minimizing the added complexity through self-contained automated functionality.
3Ease of operation
If open access to the build area is provided, then ease of operation is improved, but safety risks increase due to exposure to working parts
Solution Approach 1:
A safety barrier or gate mechanism is introduced as an intermediary between the user and the build area. This barrier can be automatically opened to allow access to printed parts while preventing direct exposure to dangerous working parts during operation. The barrier integrates with the existing interface system, maintaining ease of operation while eliminating safety risks through controlled access.
4Reliability
If protective barriers are added to protect internal mechanisms, then reliability is improved, but device complexity increases
Solution Approach 1:
The protective barrier mechanism is designed to serve multiple functions: it protects internal working parts from tampering, provides a safety interface for users, and can be integrated with the part retrieval system. By making the barrier multi-functional, the system improves reliability through protection while minimizing the increase in device complexity through consolidated functionality.
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 system enables continuous, reliable, and safe 3D printing by automatically removing completed parts, enhancing portability and protecting internal mechanisms, while ensuring user safety and efficient operation.
Implementation Method 1
a compact, parallel kinematic linkage that transfers rotary or linear motion into horizontal movement
Data Source
AI summary
The present invention concerns a system and method for fabricating a three-dimensional object. A build platform is provided that defines a build area and includes a print bed within the build area. Also provided is an extruder that extrudes build material. An ejector having at least one arm that has at least two opposing ends is used to remove the printed object. The first end of the ejector is adapted to travel in a vertical direction and the second end is adapted to travel in a horizontal direction. A scraper portion extends horizontally, parallel to the print bed from a retracted position to an extended position when the first end travels in a vertical direction towards the print bed.