3D Printer Head Melting Filament and Pellets via Rotary Screw
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Solution Overview
Problem
Existing 3D printing technologies face limitations in efficiently forming complex shapes and achieving precise coloring, particularly with the filament melt stacked method, which struggles with concave shapes and requires separate coloring processes, and the cutting method is not efficient for large objects.
Innovation Solution
A 3D printer head that simultaneously melts and ejects molding filaments and pellets using a nozzle pipe with a rotary screw and heating units, allowing for the formation of a multi-molding melt, which includes a filament supply unit, pellet supply unit, and a nozzle tip with interchangeable ejection patterns, enabling the creation of various 3D objects with improved rigidity and reduced material waste through recycling of waste materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the filament melt stacked molding method is used to form complex shapes with concave structures, then the coloring can be performed simultaneously during stacking, but the method cannot properly form concave shapes like cups and requires separate coloring processes
Solution Approach 1:
The patent combines the filament supply unit and pellet supply unit into a single integrated nozzle assembly, allowing both materials to be deposited simultaneously through different nozzle holes. This merging enables the system to form concave shapes by strategically placing filament and pellet materials in different spatial zones, while also achieving coloring through the use of differently colored materials in the same printing process.
Solution Approach 2:
The nozzle tip is segmented into multiple nozzle holes, with some holes dedicated to filament ejection and others to pellet ejection. This segmentation allows independent control of material deposition locations, enabling the formation of complex concave geometries by selectively depositing materials in specific patterns, while simultaneously achieving coloring through different colored materials.
2Adaptability or versatility
If multiple molding materials are used to form various types of 3D molding objects, then the diversity of molded objects increases, but the device complexity increases requiring separate supply systems for each material type
Solution Approach 1:
The patent merges multiple material supply functions into a single nozzle assembly that accommodates both filament and pellet materials. The integrated design includes a unified heating portion, a single nozzle tip with multiple holes, and a combined drive mechanism, allowing diverse material deposition without requiring separate printing systems for each material type.
Solution Approach 2:
The nozzle assembly is designed as a universal component that can handle multiple material types (filament and pellet) through its multi-functional structure. The heating portion can simultaneously heat both material types, and the nozzle tip can eject both materials through different holes, making the system versatile for creating various 3D objects without increasing overall device complexity.
3Device complexity
If a single nozzle is used to eject molding material, then the device structure is simple, but it cannot achieve precise control over material properties and color mixing
Solution Approach 1:
The single nozzle is segmented into multiple nozzle holes within the same nozzle tip structure. This segmentation maintains the simplicity of a unified nozzle assembly while enabling precise control over material properties by allowing different materials (filament and pellet) to be ejected through different holes with controlled positioning, achieving both structural simplicity and manufacturing precision.
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
Enables the printing of diverse 3D objects by combining filaments and pellets, enhancing molding efficiency and reducing material waste by recycling, while providing precise control over material properties and color mixing, thus overcoming the limitations of existing methods.
Implementation Method 1
a heating portion which melts the molding pellets and the molding filament by heating the nozzle pipe to form the multi-molding melt
Implementation Method 2
a rotary screw which is disposed in the penetration portion of the nozzle pipe, advances the molding pellets to one end of the nozzle pipe by rotation
Data Source
Figure 1
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AI summary
According to an aspect of the present invention, the present invention provides a 3D printer head of ejecting a multi-molding melt by receiving a molding filament and molding pellets, the 3D printer head including: a filament supply unit supplying the molding filament; a pellet supply unit supplying the molding pellets; a nozzle pipe in which a penetration portion is provided therein in a longitudinal direction, the molding pellets are supplied from the pellet supply unit, and the molding pellets move; a rotary screw which is disposed in the penetration portion of the nozzle pipe, advances the molding pellets to one end of the nozzle pipe 32 by rotation, and has a filament supply path through which the molding filament is supplied, which is formed therein in a longitudinal direction; a heating portion which melts the molding pellets and the molding filament by heating the nozzle pipe to form the multi-molding melt; and a nozzle tip which is connected to one end of the nozzle pipe and ejects the molding melt.