A 3D copier typically involves scanning an object to create a digital model and then using a 3D printer to build a physical replica. Based on the provided reference, the printing component of this process, specifically one common method, works by hardening layers of liquid material using light.
While a full "3D copier" system includes both scanning (to capture the object's shape) and printing (to recreate it), the provided information focuses on a specific type of 3D printing technology often used in such systems. This method is known as Stereolithography (SLA).
How Resin-Based 3D Printing (SLA) Works
The core of this 3D printing technique, as described, relies on a special liquid material and a precise light source. It works by exposing a layer of photosensitive liquid resin to a UV-laser beam; the resin then hardens in the desired pattern, and the object is built layer by layer until it is complete.
Here's a breakdown of the key steps:
- Preparation: A vat is filled with liquid photosensitive resin. The build platform is lowered into the resin, leaving a thin gap for the first layer.
- Layer Exposure: A UV laser is directed onto the surface of the resin, tracing the cross-section of the object's first layer.
- Hardening: Wherever the UV laser beam hits the resin, the resin undergoes a chemical reaction and hardens (polymerizes) into a solid.
- Platform Movement: The build platform is then slightly raised, allowing fresh resin to flow underneath the newly hardened layer.
- Repeat: Steps 2-4 are repeated for each subsequent layer of the object, with the laser tracing the shape of that specific layer's cross-section.
- Completion: The process continues until the entire object is built up layer by layer.
Key Components and Actions
This table summarizes the essential elements involved in this type of 3D printing:
| Component | Role |
|---|---|
| Photosensitive Liquid Resin | The raw material that hardens when exposed to UV light. |
| UV-Laser Beam | The light source used to selectively harden the resin. |
| Build Platform | Supports the object as it is built and moves incrementally. |
| Vat | Holds the liquid resin. |
Output Quality
Objects printed by SLA 3D printers have smooth surfaces, but often the quality depends upon the printer type. This smooth finish is a key advantage of using liquid resin and laser curing compared to other 3D printing methods.
In summary, the printing phase of a system often referred to as a "3D copier," particularly when using the method described, constructs objects layer by layer by selectively hardening liquid resin with a UV laser beam.
