Glossary

3D Printing – Keywords


CAD
Computer-Assisted Design = this includes all software and geometric modelling techniques that enable designing, virtual testing and production of manufactured products as well as the tools for making them.

Arbour
Unit for measurement of grains, for a grainy surface of an object.

Layer thickness
Layer thickness measures the volume of each addition of material in the additive manufacturing or 3D printing methods, which are based on layer stacking.

Fab lab
FABrication LABoratory = communal digital manufacturing workshop open to everyone (handymen, designers, artists, students, hackers, …). It is equipped with computer-controlled machines, and it must comply with the conditions of a charter lain down by the MIT.

Additive manufacturing
Manufacturing method which involves the addition of material, mostly computer-assisted.

FDM
Fused deposition modeling = depositing a wire: mechanical deposition of plastic material with the application of successive layers. The machine deposits a molten plastic wire via a nozzle.

3D File
Electronic file representing a 3D object. It is designed in 3D modelling, which allows for the printing of a desired object with a 3D printer. The 3D file is created with CAD.

GF
Glass filled: material filled with fibreglass.

HST
Mineral Fibre Filled: material filled with mineral fibres.

3D Printing
Additive manufacturing method. Here are some technologies which go together: FDM, SLA and laser-based selective Sintering…

3D Printer
Machine used for the manufacture of 3D pieces, by depositing successive layers of molten material.

Model
A partial or full representation of an object (existing or planned), for the purpose of testing and validating certain aspects of it. The model can be made on a given scale, which is most of the time reduced or enlarged for easier visualisation of it.

3D Model
Object obtained with 3D modelling.

3D Modellisation
Stage in three-dimensional computer graphics which involves the creation of an object in three dimensions in 3D modelling software, as its components are added to, deleted and modified.
PA
Polyamide: polymeric plastic.

PC
Poly-Carbonate : polymeric plastic.

HDPE
High density polyethylene: polymeric plastic.

Photosensitive
Material which reacts to light radiation.

Polymerisation
A chemical reaction or method in which small molecules react with each other to create molecules of higher molar masses.
PP
Polypropylene: polymeric plastic.

Rapid prototyping
Computer-controlled manufacturing method which brings together a set of tools which, when matched, can lead to intermediary representation projects in product design: models, prototypes and pre-series.

Prototype
An original model which possesses all the technical qualities and all the operating characteristics of a new product, but sometimes it is also an incomplete copy of what a product could be.

RIM
Reaction Injection Molding = During the creation of a mold in epoxy resin or silicone (previously from a master model created using stereolithography), a prototype can take shape.

SLA
StereoLithography Apparatus = Stereolithography: polymerisation of a photosensitive epoxy resin with an ultra-violet laser, in layers of 0.10 to 0.15 mm.

SLS
Selective laser sintering = powder Sintering: polyamide particles are agglomerated by a CO2 laser.

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