Extrusion Head Blade Layout for Clean Multi-Material Filament Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing additive manufacturing processes face challenges in producing complex shapes with high processing speeds and accuracies, particularly when multiple materials are required, and current extrusion heads often deform or fail to cleanly cut extrusion material, leading to inefficiencies and contamination.
Innovation Solution
An extrusion head with a separating device featuring a blade element and a displacement unit that allows for gap-free passage, ensuring clean cutting of extrusion material without deformation, and includes cooling and conveying mechanisms to maintain process reliability under high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cutting device is used to cut extrusion material after extrusion, then the material can be severed, but the extrusion material is deformed during the cutting process and cobweb-like thread formation occurs
Solution Approach 1:
The extrusion material is cooled down in a cooling device before cutting to reduce its deformation tendency. This preliminary cooling action prepares the material in an optimal state for subsequent clean cutting, preventing cobweb-like thread formation and ensuring high cutting quality while maintaining cutting speed
Solution Approach 2:
A cooling device is introduced as an intermediary between the extrusion and cutting processes. This cooling device mediates the material's thermal state, reducing its temperature and deformation propensity before it reaches the cutting device, thereby enabling clean cuts without deforming the material
2Productivity
If high nozzle temperatures are used for processing high-performance plastics, then the material can be extruded effectively, but the extrusion material becomes soft and difficult to cut cleanly
Solution Approach 1:
The cooling device performs preliminary cooling of the extrusion material immediately after extrusion, reducing its temperature and softness before it reaches the cutting zone. This allows effective extrusion at high temperatures while preparing the material for easy, clean cutting
Solution Approach 2:
The temperature parameter of the extrusion material is dynamically changed through the cooling device. The material is extruded at high temperature for effective processing, then rapidly cooled to a lower temperature that makes it easier to cut cleanly, thus optimizing both extrusion efficiency and cutting ease
3Device complexity
If the displacement unit passes the separating device with gaps, then the mechanism is simpler, but the extrusion material cannot be brought close to the blade element for clean cutting
Solution Approach 1:
The displacement unit is designed to be movable relative to the separating device, allowing dynamic adjustment of the gap between them. This dynamic positioning enables the extrusion material to be brought close to the blade element for precise cutting when needed, while maintaining overall mechanism simplicity through controlled movement rather than complex fixed structures
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 solution ensures reliable cutting and processing of extrusion material, minimizing deformation and contamination, while maintaining process reliability and efficiency, even under high ambient and nozzle temperatures.
Implementation Method 1
at least one cooling device is provided for cooling the at least one displacement unit and/or the at least one extrusion material and/or the separating device and/or the at least one blade element
Implementation Method 2
the at least one extrusion material can be introduced into a first liquefying assembly
Implementation Method 3
at least two liquefying assemblies are provided in the at least one displacement unit
Data Source
AI summary
An extrusion head for additive manufacturing of a product, including a material feed unit for feeding an extrusion material, preferably in filament form, a separating device with a blade element, and a displacement unit with at least two liquefying assemblies. The extrusion material can be introduced into a first liquefying assembly and, by passing the displacement unit past the separating device in an approximately gap-free manner such that the extrusion material can be brought close to the blade element and can be severed at a severing point, the upper end of the extrusion material can be introduced into a second liquefying assembly. The blade element can be fastened or is fastened to or in the material feed unit or is a component of the material feed unit.