SLA 3D Printer
Stereolithography
ChanHonTech, offers industrial SLA 3D printer equipment and solutions. We’ll cover everything you need to know about Stereolithography files, including their structure, use cases, and how they facilitate SLA 3D printing.
What Is Stereolithography?
Stereolithography (SLA) is one of the most precise and widely used 3D printing technologies in the manufacturing and prototyping industries. SLA works by using a laser to cure liquid resin layer by layer, creating highly detailed and accurate models with smooth surface finishes. This process is particularly favored for producing intricate parts, rapid prototypes, and functional prototypes, thanks to its ability to print highly detailed geometries with minimal post-processing.
How Does SLA 3D Printer Work?
SLA 3D printing uses a photosensitive resin that hardens when exposed to ultraviolet (UV) light. The process begins with the laser scanning the surface of the resin tank according to the 3D model’s design. The resin solidifies wherever the laser touches, forming one thin layer at a time. After each layer is completed, the platform is lowered, and the process repeats until the model is fully formed.
Preparation and Setup:
A 3D model is first designed using CAD software and then saved as an STL file. This file is imported into slicer software, which translates the design into detailed printing instructions. The build platform is then submerged into a vat filled with liquid photopolymer resin, positioned just above the resin’s surface, allowing a thin layer to remain exposed.Printing Process (Layer-by-Layer):
A UV laser beam, directed by a mirror system or galvanometers, precisely focuses on the resin surface, curing it layer by layer to form the first solid layer. After each layer is completed, the build platform rises, creating space for a fresh layer of resin to be cured. This process continues, with the laser drawing each new layer until the object is fully formed.Post-Processing:
Once the part is finished printing, it is carefully removed from the resin vat. The printed object may require removal of support structures and additional post-curing to enhance material strength and finish. The SLA printing technique essentially uses a laser to solidify the resin layer by layer, with the build platform adjusting upward as each new layer is completed, until the object reaches its final form.
Stereolithography 3D Printing Services
We provide a comprehensive additive manufacturing solution for SLA, combining advanced hardware, intuitive software, and high-performance materials, all engineered to deliver superior surface quality and precision. The edge definition, dimensional tolerances, and accuracy of our SLA components are on par with those of traditionally machined or molded plastic parts.
Our SLA printers produce precise parts directly from 3D CAD data, bypassing the need for tooling. They achieve this by transforming liquid resins and composites into solid layers through the application of a focused ultraviolet laser. As each layer is cured, the print bed lowers, and a fresh layer of resin is applied, allowing the subsequent layer to form on top of the last, until the part is fully constructed. After printing, the part undergoes cleaning in a solvent bath to eliminate any residual wet resin. It is then placed in a UV oven to complete the curing cycle.
Our SLA production systems offer exceptional throughput, with build volumes reaching up to 800×800×550mm, unmatched precision, and a broad selection of materials. This process supports an extensive range of applications, including the most demanding rapid manufacturing needs, making it the ideal solution for a variety of industries.
Our SLA 3D Printing Services offer a range of build volumes and price points.
SLA 3D Printing Applications
Delivering the smoothest surface finish of any additive manufacturing process, the quality of SLA parts makes this versatile technology great for:
General
• Design verification models for appearance and proof-of-concept models
• Functional prototypes and models for form and fit testing
• Wind-tunnel test models
• High clarity, transparent products and components
• Complex assemblies
• Under-the-hood components
• Mass customization
Tooling and patterns
• Investment casting patterns
• Sacrificial patterns for metal casting
• Custom assembly jigs and fixtures
• Tools, molds and dies
• Cast urethane/vacuum casting master patterns
Biocompatible materials
• Surgical tools/guides
• Dental appliances
• Hearing aids
Industrial SLA 3D Printers
MAX. 15m/s Scan speed, 350×350×300 mm Build Envelope Capacity, Advanced recoating, New LCD-based UI design for easier interaction.
MAX. 15m/s Scan speed, 600×600×400 mm Build Envelope Capacity, Marble base ensures process stability and surface quality, large-part precision.
800×800×550 mm large build, High Precision Control, Variable spot + scan mode boosts speed by 30%-40%.—perfect for aerospace tooling and large prototypes.
SLA 3D Printer FAQs
How does SLA differ from FDM printing?
While FDM (Fused Deposition Modeling) extrudes melted plastic filament, SLA uses UV lasers or LEDs to harden liquid resin. SLA offers superior detail (down to 25–100 microns), smoother finishes, and better accuracy for complex geometries. FDM is better suited for larger, low-cost functional parts.
What materials can SLA printers use?
SLA printers support specialized resins with diverse properties:
Standard Resins: Ideal for prototypes and visual models.
Tough/Durable Resins: Mimic engineering plastics (e.g., ABS, PP) for functional parts.
Flexible Resins: Rubber-like elasticity.
Castable Resins: Burn out cleanly for jewelry molds.
Dental/Biocompatible Resins: Certified for medical use.
What safety precautions are needed with SLA printers?
Ventilation: Always operate in a well-ventilated area—resins emit fumes.
PPE: Wear nitrile gloves and safety goggles when handling resin.
Storage: Keep resin in opaque containers away from UV light.
Disposal: Cure liquid waste before disposal; follow local chemical regulations.
How do I post-process SLA prints?
A 3-step process is essential:
Rinsing: Clean uncured resin using isopropyl alcohol (IPA) in a wash station.
Curing: Post-cure parts under UV light for 10–30 minutes to achieve final hardness.
Finishing: Sand, prime, or paint for enhanced aesthetics.
Are SLA parts durable?
Standard resins are brittle but ideal for display models. For functional use, select engineering-grade resins (e.g., “Tough” or “Durable”) that withstand stress, heat (up to 80°C+), or flexibility. Always match resin properties to your application.
How do SLA 3D printing costs compare to other technologies?
While SLA resins and maintenance can be more expensive than FDM filament, the superior surface finish and resolution often reduce downstream labor (e.g., sanding, painting) and material waste, making SLA cost-effective for high-detail prototypes and small series production.