Peripheral Polymer Strand Heating for Additive Manufacturing
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Solution Overview
Problem
Traditional subtractive manufacturing methods are time-intensive, labor-intensive, and limit design iteration, hindering collaboration and optimization in the design process, while existing additive manufacturing technologies struggle to produce industrial-grade parts with uniform mechanical properties.
Innovation Solution
An additive manufacturing system that heats only the surface of solid polymer strands or particles to liquefy them, maintaining the central core solid, allowing for monolithic attachment to a substrate without deformation, enabling the production of industrial-grade parts with controlled mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional subtractive manufacturing methods are used, then material strength and uniform mechanical properties are maintained, but production time and labor intensity increase significantly
Solution Approach 1:
The patent utilizes phase transition of polymer materials from solid to liquid state through controlled heating. The polymer strands are heated to melt only their surfaces while maintaining solid cores, enabling attachment during manufacturing and subsequent solidification to achieve monolithic attachment without deformation, thus resolving the contradiction between production speed and mechanical property uniformity
Solution Approach 2:
The patent implements precise parameter control by heating polymer strands to specific temperatures that melt only the surface layer while keeping the core solid. This parameter-based control enables the material to transition between states during manufacturing, allowing rapid production while maintaining uniform mechanical properties through controlled phase changes
2Ease of manufacture
If polymer materials are heated to melt for additive manufacturing, then material flow and attachment are improved, but deformation and loss of mechanical properties occur
Solution Approach 1:
The patent applies local quality by differentiating the thermal treatment of different parts of the polymer strand. The surface is heated to a temperature sufficient for melting and attachment, while the core remains solid to maintain structural integrity and mechanical properties. This localized thermal processing resolves the contradiction between ease of attachment and material strength
Solution Approach 2:
The patent segments the polymer strand into functional zones: a melted surface layer for attachment and a solid core for structural support. This segmentation allows each part to serve its specific function - the surface provides bonding capability while the core maintains mechanical strength, eliminating the need for additional supports
3Adaptability or versatility
If complex shapes are produced using traditional methods, then design flexibility is achieved, but time-to-market and development cost increase
Solution Approach 1:
The patent implements preliminary action by pre-heating polymer strands to a state where only the surface is melted before deposition. This preliminary thermal preparation enables immediate attachment to the substrate upon contact, allowing complex shapes to be built rapidly layer by layer without requiring additional support structures or post-processing, thus reducing time-to-market while maintaining design flexibility
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 approach allows for the efficient production of industrial-grade parts with uniform mechanical characteristics, reducing the need for additional supports and enabling the creation of complex shapes, while maintaining material strength and flexibility, thus overcoming the limitations of traditional methods.
Implementation Method 1
heating a surface of the continuously received solid polymer material peripherally to liquefy the surface, using specified heating-related parameters which are selected to maintain a central volume of the continuously received solid polymer material in a solid state
Implementation Method 2
The attachment to the substrate is achieved by a re-solidification of the liquefied surface to yield monolithic attachment
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
Systems and methods of additive manufacturing are provided, in which solid polymer material in form of strand(s) or particles is continuously received, and its surface is heated peripherally to liquefy the surface, using specified heating-related parameters which are selected to maintain a central volume of the continuously received solid polymer material in a solid state. The surface of a polymer substrate is also liquefied, and the peripherally heated surface of the continuously received solid polymer material is attached to the liquefied surface of the polymer substrate, followed by re- solidification of the liquefied surface to yield monolithic attachment of the material to the substrate. Liquefying only the surface of the material maintains some of its strength and prevents deformation upon solidification. The monolithic attachment provides uniform and controllable industrial products.