3D Nozzle Pressing Layout for Gap-Free Deposition Coupling
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Solution Overview
Problem
Existing three-dimensional molding devices face issues with materials ejected from adjacent nozzles contacting after varying time intervals, leading to inconsistent states and potential gaps between deposition portions.
Innovation Solution
A three-dimensional molding device with a configuration that includes a stage, an ejection unit with adjacent nozzle holes, a position changing unit, and pressing units to align and press deposition portions, reducing the time difference between ejection and contact, and ensuring consistent material coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If materials are ejected from adjacent nozzles in a staggered arrangement, then the ejection unit structure is simplified, but gaps occur between deposition portions due to time differences in material contact
Solution Approach 1:
A pressing unit is introduced as an intermediary component between the ejection unit and the stage. This pressing unit applies pressure to the deposited material in the movement direction of the ejection unit, forcing adjacent deposition portions to couple together and eliminate gaps. The pressing unit acts as a mediator that resolves the timing mismatch issue between staggered nozzle ejections.
Solution Approach 2:
The pressing unit performs a preliminary pressing action on the deposited material immediately after ejection. By applying pressure in the movement direction before the material fully solidifies, the system ensures proper coupling of adjacent deposition portions and prevents gap formation that would otherwise occur due to the staggered ejection timing.
2Device complexity
If nozzles are arranged in a staggered manner, then device complexity is reduced, but adhesion between deposition portions deteriorates
Solution Approach 1:
The pressing unit serves as a mediator that enhances adhesion between deposition portions from staggered nozzles. By applying mechanical pressure in the movement direction, it forces intimate contact between adjacent deposited materials, compensating for the time delay in material contact and ensuring strong interlayer adhesion despite the simplified staggered nozzle arrangement.
3Productivity
If materials are ejected with time differences, then the ejection process is continuous, but air bubbles remain trapped in the deposited material
Solution Approach 1:
The pressing unit acts as a mediator that removes air bubbles trapped during continuous staggered ejection. By applying pressure in the movement direction, it compresses the deposited material and forces air bubbles to escape, maintaining continuous productivity while ensuring material reliability free of voids.
Solution Approach 2:
The pressing unit changes the density parameter of the deposited material by applying compression. This parameter change reduces void space where air bubbles would be trapped, allowing continuous ejection to proceed while maintaining material quality through increased density and reduced porosity.
Data Source
AI summary
A three-dimensional molding device includes: a stage; an ejection unit including a tip end portion in which a first nozzle hole and a second nozzle hole are formed adjacent to each other at a predetermined interval along a first axis, and configured to eject a material from the first nozzle hole and the second nozzle hole toward the stage; a position changing unit configured to change relative positions of the stage and the ejection unit along a second axis that is parallel to a deposition surface and that is orthogonal to the first axis; and a pressing unit disposed on a rear side in a movement direction of the ejection unit relative to the stage and configured to press the material deposited on the stage. The pressing unit presses a first deposition portion formed by the material that is ejected from the first nozzle hole and deposited, and a second deposition portion formed by the material that is ejected from the second nozzle hole and deposited at an interval from the first deposition portion, so as to couple the first deposition portion and the second deposition portion.