Table of Contents
Project Summary3D printing, or also known as additive manufacturing, is a process that creates 3-dimensional solid objects from a digital file. Through additive processes layers of material are laid down under computer control to create these 3D objects.1 Most 3D printers use FDM process, fused deposition modeling, which is a process that pushes thermoplastic filament through a heated barrel where it then melts. The plastic then moves through a small diameter nozzle. This technology has widely grown within the past 2-3 years due to the FDM process and the large amount of low cost printers. The future state of this technology will use unmodified plastic injection molding pellets which will benefit the 3D printing community by dramatically reducing the cost of consumable materials, will allow much wider range of materials used, and will allow high performance materials to be used.
The goals of this project are to design, prototype, and demonstrate a new 3Dprint head that can use ordinary plastic injection molding pellets as the feedstock. It should withstand up to 380°C, is reliable and functioning for 10 hours without failure, and has interchangeable extrusion nozzles that are of roughly 75 mm cube and 1kg mass, with different diameter holes. This print head needs to be able to work with standard hobby grade 3D printer control electronics.
1- What it is 3D printing? (n.d.). Retrieved September 2, 2014, from http://3dprinting.com/what-is-3d-printing/#whatitis
Project Goals and Key Deliverables
- A 3D printer head that uses ordinary unmodified plastic injection molding pellets as feedstock material.
- CAD models of final design(s).
- Schematics for electronics.
- Bill of Materials with sources of components, quantities and cost.
- Clearly illustrated manual that provides instructions on how to build print head
- Test results demonstrating nozzle is capable of extruding ULTEM high temperature plastic
- Test results demonstrating extruder can run continuously for 10 hours without clogging or failure
Customer Requirements (Needs)
Engineering Requirements (Metrics & Specifications)
House of QualityHouse of Quality
- Cost under $500
- Must have size, mass, and control electronics that allow it to be used with hobby style 3D printers