3D Printing Stacker With Hinged Conveyor for Precise Sheet Alignment
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Solution Overview
Problem
The existing 3D printing systems face issues with reliable material feeding, fluid management, and accurate sheet alignment due to the cohesive nature of carbon fiber and fiberglass substrates, leading to errors and manual intervention requirements.
Innovation Solution
The system employs a felt gripper with sliding contact and angled plates to enhance gripping strength, reduces the number of wires in the platen for better fluid management, and introduces a hinged conveyor for controlled sheet alignment in the stacker, eliminating the need for manual adjustments and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a felt gripper is used to lift carbon fiber sheets, then gripping strength is improved, but sheets tend to cohere and multiple sheets may be picked up together
Solution Approach 1:
The felt gripper is divided into multiple independently movable felt regions that can apply gripping force at different locations on the sheet, allowing selective engagement and better control over sheet separation
Solution Approach 2:
The gripper transitions from a purely vertical lifting motion to include a sliding contact dimension, where the felt regions move horizontally across the sheet surface during engagement, creating a two-dimensional gripping action that enhances both grip strength and sheet separation
2Reliability
If manual arrangement of sheets with notches is used, then sheet cohering is prevented, but the process requires manual intervention and reduces automation
Solution Approach 1:
The system eliminates the need for manual sheet arrangement by using the automated felt gripper with sliding contact to naturally separate and position sheets during the feeding process, making the sheet handling self-regulating without human intervention
Solution Approach 2:
The invention changes the operational parameters of the felt gripper by introducing sliding motion and independent region control, which fundamentally alters how sheets are handled and separated, replacing manual arrangement methods with automated mechanical control
3Strength
If multiple wires are used in the platen, then substrate support is improved, but fluid management becomes more difficult
Solution Approach 1:
The invention extracts and removes excess wires from the platen structure, retaining only the essential number of wires needed for substrate support while eliminating the fluid management problems caused by having too many wires in the printing area
4Device complexity
If conventional stacking methods are used, then sheet stacking is simple, but alignment accuracy deteriorates
Solution Approach 1:
The invention introduces tapered registration pins as intermediary elements between the sheets during stacking, which fit into corresponding holes to precisely align and register each sheet in the stack, maintaining simplicity while achieving high alignment 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 improvements result in a significant reduction of error rates from 10% to 0.5%, enhancing the overall reliability and accuracy of the 3D printing process.
Implementation Method 1
gripping strength is enhanced when the initial contact between felt and substrate is a sliding contact rather than purely downward. A sliding contact causes greater interlacing of fibers, thus increasing the grip force
Implementation Method 2
a hinged conveyor for controlled sheet alignment in the stacker
Implementation Method 3
The sheet then moves to a stacking stage, where it is placed on top of a previous sheet
Data Source
AI summary
A stacker for a 3D printer apparatus contains a positioning conveyor and a support plate hinged to drop on a signal, whereupon a push plate will push a printed and powdered sheet downward and onto registration pins, to form a stacked register of such sheets.