3D Printing Filament Cutting and Heating Arrangement
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Solution Overview
Problem
Existing 3D printing technologies face challenges in achieving dimensional accuracy and workability due to the location of the cutting unit relative to the heating unit, leading to increased distances and repeated filament passage through heating elements, which affects the quality and adhesiveness of the printed objects.
Innovation Solution
A manufacturing apparatus with a cutting unit positioned between the pressurizing and heating units in the delivery direction of the filament, utilizing individually and collectively cutting units to precisely cut the filaments, and a drive system to pull cut ends back into the heating unit for reheating, ensuring improved dimensional accuracy and workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cutting unit is positioned upstream of the heating unit, then the filament can be cut before heating, but the distance between cutting and heating increases causing reduced dimensional accuracy
Solution Approach 1:
The cutting unit is inverted to position downstream of the heating unit rather than upstream, reversing the conventional arrangement. This allows the filament to be heated first and then cut immediately at the deposition point, minimizing the distance between heating and cutting operations while maintaining manufacturing accessibility.
Solution Approach 2:
The cutting unit is positioned in a different spatial dimension relative to the heating unit, specifically downstream in the filament delivery direction. This dimensional repositioning allows the cutting operation to occur at the optimal location near the deposition point without interfering with the heating process upstream.
2Device complexity
If the filament is cut upstream of the heating unit, then cutting operation is simpler, but the filament must pass through heating elements repeatedly affecting adhesiveness
Solution Approach 1:
The cutting operation is inverted to occur downstream after heating rather than upstream before heating. This eliminates the need for repeated filament passage through heating elements, as the filament is heated once during deposition and then cut immediately, preserving adhesiveness and material properties.
3Ease of operation
If the cutting unit is positioned far from the heating unit, then easier access for cutting, but increased distance affects the quality of printed objects
Solution Approach 1:
The cutting unit is positioned in a different spatial dimension downstream in the filament delivery path, allowing close proximity to the heating and deposition zone. This dimensional placement enables both high print quality through minimal distance and operational accessibility through strategic positioning at the end of the heating section.
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 configuration enhances the dimensional accuracy and workability of the printed objects by reducing the distance between cutting and heating units, preventing repeated filament passage through heating elements, and maintaining adhesiveness through reheating of cut ends.
Implementation Method 1
a heater that heats the composite filament shear tip to a temperature higher than the melting temperature of the matrix material
Implementation Method 2
a pressurizing unit disposed downstream of the delivery unit in a delivery direction of the filament, the pressuring unit that pressurizes the filament delivered to the surface against the surface
Data Source
AI summary
A manufacturing apparatus includes: a table having a surface; a delivery unit including a heating unit that heats a filament, the delivery unit that delivers the filament toward the surface; a pressurizing unit disposed downstream of the delivery unit in a delivery direction of the filament, the pressuring unit that pressurizes the filament delivered to the surface against the surface; and a cutting unit that cuts the filament between the pressurizing unit and the heating unit in the delivery direction.