Multi-Material 3D Shoe Printing With In-Process Residue Cleaning
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Solution Overview
Problem
Traditional 3D printing methods are limited by the use of a single material per job, leading to cumbersome and costly processes, material waste, and residue contamination, which compromises the quality and functionality of the final product.
Innovation Solution
A method involving multiple material tanks, cleaning steps, and movable build platforms for precise multi-material printing, utilizing techniques like DLP and photopolymerization with UV light, and incorporating cleaning solutions and air knives or ultrasonic cleaning to ensure thorough residue removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional single-material 3D printing is used, then the printing process is simple, but the material use is limited and cannot meet functional and aesthetic requirements
Solution Approach 1:
The printing system is segmented into multiple independent material tanks (first material tank, second material tank) that can be selectively switched. Each tank contains a different printing material, allowing the system to print with multiple materials while maintaining a relatively simple base printing mechanism. The build platform is divided into regions that can be selectively exposed to different materials.
Solution Approach 2:
The system dynamically switches between different printing materials during the printing process. The build platform moves between different material tanks, and the printing head selectively applies different materials to different regions of the object being printed. This dynamic material switching enables multi-material printing without requiring completely separate printing processes.
2Adaptability or versatility
If multiple materials are used in traditional printing, then functional and aesthetic requirements are met, but the process becomes cumbersome and costly with meticulous processing and assembly
Solution Approach 1:
Multiple printing operations with different materials are merged into a single continuous printing process. The build platform remains on the printing system throughout, and different materials are applied sequentially to the same object without removing it from the platform. This eliminates the need for separate printing jobs and manual assembly operations.
Solution Approach 2:
The system prepares different printing materials in advance in separate tanks, and the build platform is pre-positioned to receive different materials in predetermined sequences. This preliminary preparation allows for complex multi-material objects to be printed without requiring complex real-time decision-making or manual intervention during the printing process.
3Adaptability or versatility
If traditional multi-material printing is used, then different material properties are achieved, but excess material waste is created which is expensive and reduces manufacturing sustainability
Solution Approach 1:
Different printing materials are applied to specific local regions of the build platform based on the object's design requirements. The printing head selectively deposits material only where needed, and the build platform regions are selectively exposed to different materials. This localized material application minimizes excess material waste compared to applying all materials throughout the entire printing volume.
4Quantity of substance
If traditional printing methods are used, then material residues remain on the product which decreases final product quality
Solution Approach 1:
The cleaning operation is extracted as a separate step that occurs after printing but before the object leaves the build platform. The cleaning mechanism removes material residues from the object surface and from the build platform regions that will be used for subsequent printing. This extracted cleaning step ensures high manufacturing precision by eliminating contaminants that would otherwise remain on the product.
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
This method enables high-precision, efficient, and sustainable multi-material printing, reducing waste and ensuring structural integrity and aesthetic quality by maintaining clean layers and optimal material properties.
Implementation Method 1
providing one or more standing waves of cleaning solution; cleaning the object by exposing it to the one or more standing waves of cleaning solution
Implementation Method 2
drying the cleaned object by exposing it to the one or more air knifes
Implementation Method 3
providing one or more air knifes; cleaning the object by immersing the object into the ultrasonic cleaning tank
Implementation Method 4
The printing could be carried out by photopolymerization and the photopolymerization could be enabled by UV light
Data Source
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AI summary
A method of printing a three-dimensional object, comprises at least the steps of providing at least a first (11, 1211, 1411) and a second printing material (21, 1221, 1421) separated in at least a first (10, 310, 1210, 1410) and a second material tank (20, 320, 1220, 1420); providing a build platform (100, 200, 1200, 1400); a first printing step of printing the object at least partially onto the build platform with the first printing material; a cleaning step of cleaning the object from the first and/or second printing material; and a second printing step of printing the object at least partially onto the build platform with the second printing material.