How does SLA 3D printing work

2024-07-30

Stereolithography Apparatus (SLA) 3D printing is a process that uses a liquid resin cured by light to create 3D objects layer by layer. Here’s how it works:

Resin Tank: The process begins with a basin filled with liquid photopolymer resin.

Laser Beam: A laser beam is directed at the surface of the resin, tracing the pattern of the first layer of the object to be printed.

Curing: The laser beam cures (solidifies) the resin wherever it touches, forming the first layer of the object.

Platform Movement: After the first layer is cured, the build platform moves slightly downward, and a wiper blade coats the surface with a new layer of resin.

Layering: The laser then cures the next layer of resin on top of the previous one, bonding it to the layer below.

Repeat: This process of curing and lowering the platform is repeated layer by layer until the entire object is formed.

Post-Curing: Once the printing is complete, the object is removed from the resin tank and undergoes a post-curing process to fully harden the resin.

Support Structures: SLA printing often requires the use of support structures, which are later removed, to hold up overhanging parts of the object during the printing process.

SLA 3D printing is known for its high precision and ability to produce intricate details, making it popular for applications like jewelry making, dental modeling, and complex industrial parts.