by Jackie Johnson Jackie Johnson No Comments

History of 3D Printing

3D Printing, or additive manufacturing, is older than most people think. In fact, it has been around since the 1980s! Today we will go over this technology’s exciting history, from its earliest prototypes to today’s use. In this blog post, we will go over the history of 3D printing, from it’s earliest prototype to today!

While the concept of 3D printing has been around since the 70s, the first experiments began in 1981, when Dr. Kodama began research into a rapid prototyping technique. He was the first person to describe the layer-by-layer development that 3D Printing is famous for. Dr. Kodama used SLA (Stereolithography), which is a photosensitive resin that he then polymerized with a UV light. While it is clear that Dr. Kodama was the first to describe, he, unfortunately, did not file the patent in time.

In 1986, an engineer by the name of Charles Hull submitted the first patent for SLA. Two years later he founded the 3D Systems Corporation and released the SLA-1, the first, official, 3D printer.

1988 was a big year for 3D printing technology! That year, along with the founding of 3D Systems Corp, the University of Texas was also dabbling in the fledgling technology. Carl Deckard developed a patent for selective laser sintering (SLS) which is a 3D printing technique in which powder grains are fused together by a laser. At the same time, Stratasys Inc. filed a patent for fused deposition modeling (or FDM).

The 90s had its share of 3D printing innovations. But it wasn’t until the 2000s when 3D printing as we know it really gained traction, especially in the media. 2000 saw the world’s first 3D printed kidney, which put the spotlight on the technology. In 2004, home printers started to become more readily accessible, leading to a boom in the maker community that is still going strong today.

2008 saw the world’s first 3D printed prosthetic limb, 2010 the first 3D printed car. There seemed to be no limit to what this technology could do. And in 2013, then-President Barak Obama included it as a major issue in his State of the Union speech.

3D Printing is continuing to grow and expand, with sights focused on the ability to print in more materials. Today printers can use industrial-strength materials such as PEEK, PTFE, nylon, and even metals. There are also several types of research being done on the subject of 3D Bioprinting, which could completely change the medical industry. There truly is no limit to what this technology can do. We are just beginning to scratch the surface of what 3D printing can do.

by Jackie Johnson Jackie Johnson No Comments

The Different Types of 3D Printing

3D printing has seemingly taken over the world! Because of it’s increasing popularity with both manufacturers and hobbyists, more and more 3D printers are being produced each year. There also many different types of 3D printing technologies, which vary in cost, effectiveness, materials used, speed and cost. These include:

  • Stereolithography (SLA)
  • Selective Laser Sintering (SLS)
  • Fused Deposition Modeling (FDM)
  • Digital Light Process (DLP)
  • Multi Jet Fusion (MJF)
  • Direct Metal Laser Sintering (DMLS)
  • Electron Beam Melting (EBM)

Because there are quite a few, we will be breaking this post into two parts, with the next part coming next week, so stay tuned! 

In the meantime, let’s discuss some 3D printing methods!

FDM Printing

FDM Printing

FDM

Fused Deposition Modeling (FDM) is one of the most widely available 3D Printing technology today. It uses a process called material extrusion, where a solid material, usually some form of thermoplastic (PLA, ABS, PET, etc.) is pushed through a heated nozzle attached to the printer head, melting the material. As the printer head moves along specific coordinates, it deposits the material, where it cools and solidifies, forming a solid object. 

  • Relatively Inexpensive
  • Ease of Use
  • Wide Variety of Materials

SLA

Stereolithography (SLA) uses a printing method called vat polymerization, where a material called photopolymer resin is exposed to an ultraviolet laser, which is used to draw pre-preprogrammed designs or shapes onto the material. This process is repeated for each layer until a 3D object is completed, and then washed in a solvent to remove excess resin. Because of this, SLA printing is often messy. You are also restricted to printing with resin materials, which can be expensive. The benefits, however, include:

  • Higher quality prints than FDM
  • Faster Print Speed
  • Stronger Finished Products

SLA Printer

SLS

Selective laser sintering (SLS) uses a laser to sinter powdered material together until a 3D model is formed. Unlike FDM and SLA, which have become incredibly popular in the hobbyist market, SLS has remained mostly in the realm of industrial manufacturing, because of the high cost (and potential dangers) of the lasers and materials. There are many advantages to SLS printing, including: 

  • The ability to print objects without support structures. 
  • High Strength and Stiffness
  • Good Chemical Resistance
  • Incredibly fast print speed

Stay tuned for next week for part two, where we discuss even more 3D printing methods!