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What is DLP 3D Printing?

Digital Light Processing (DLP) is an advanced additive manufacturing technology that uses a digital light projector to cure photopolymer resin layer by layer. This process enables the production of high-resolution parts with fine details, smooth surfaces, and excellent mechanical properties. DLP is widely used in industries requiring precision, such as medical, automotive, and consumer goods manufacturing.

DLP Materials

ABS-like

The ABS-like resin for DLP technology is a photosensitive material designed to offer properties similar to traditional ABS. Characterized by high mechanical strength, rigidity, and good workability, it is ideal for producing functional prototypes, mechanical components, and parts for the automotive and electronics industries. The DLP process ensures high-resolution printing, with precise details and a smooth surface finish, guaranteeing excellent model reproduction.

Rubber-like

Rubber-like DLP resin is a flexible photosensitive material designed to replicate rubber properties. It offers a combination of elasticity, impact resistance, and durability, making it ideal for gaskets, dampers, and flexible prototypes. The DLP process ensures finely detailed parts with smooth finishes that accurately reproduce rubber-like characteristics.

High Temp

High Temp is a photosensitive resin characterized by high thermal resistance, meaning it can withstand high temperatures without undergoing permanent deformation. It is particularly suitable for applications requiring heat resistance, such as engine components, mold parts, and items exposed to high temperatures.The DLP process enables precise, durable, heat-resistant parts with a smooth finish.

Medical

Medical DLP resin is a photosensitive material specifically engineered for medical applications. This biocompatible resin ensures high-resolution printing of medical device prototypes, prosthetics, and other customized healthcare components. The DLP process guarantees compliance with medical standards and produces high-quality parts for the healthcare industry.

DLP Material Properties Compared

Material

Colour

Max. dimensions

Tensile Stress at break (MPa)

Tensile Modulus (GPa)

ABS like

white, black

510x280x350 mm

35-63

1.5-2.3

High Temp

amber, black

510x280x350 mm

77-80

4.0-4.1

Rubber like

black

124x70x196 mm

19-23

0.005-0.526

Medical

white, amber, black

510x280x350 mm

60-61

2.4-3.1

DLP Surface Finishes

Painting

Involves applying protective coatings or decorative finishes to printed objects using specialized techniques to improve aesthetics and durability.

UV Curing

SLA capabilities compared with other technologies

Capabilities

Max. Dimensions

Min. Feature Size

Min. wall thickness

Tolerance

Description

SLS

680x380x540 mm

0.8mm

0.7-1.3 mm 

±0.3% (±0.3mm)

Uses a laser to fuse powdered materials layer by layer, ideal for creating durable and complex parts without support structures,  widely employed in aerospace, automotive, and medical industries.

DMLS

500x280x340 mm

0.6-0.8 mm

0.22 mm

±0.25 (≤15mm);
±0.5 (>15mm)

Similar to selective laser sintering but uses metal powders, producing high-strength, intricate metal parts suitable for functional prototypes and end-use components in aerospace, medical, and automotive industries.

SLA

1350x750x500 mm

0.2-0.5 mm

1-3 mm

±0.2% (min. 0.2 mm)

Employs a UV laser to cure liquid resin into solid layers, ideal for creating highly detailed, smooth, and intricate parts. Widely used for detailed prototypes and intricate designs in jewelry and dental applications.

MJF

380x284x380 mm

0.5 mm

0.3-0.5 mm

±0.3% (±0.2 mm)

Utilizes multiple jets to apply fusing agents onto powder, which is then fused by heating elements. Delivers high-resolution, functional parts with fast production times, often used in aerospace, automotive, and consumer goods industries.

Polyjet

490x380x200 mm

1.2-2 mm

1 mm

±0.1%

Jetting liquid photopolymer resin and curing it layer by layer with UV light, enabling highly detailed, multi-material parts with diverse properties. Popular in prototyping and complex, color-rich models in medical modeling, consumer goods and electronics fields.

FDM

914x690x914 mm

1.2-1.5 mm

1.5 mm

±0.5% (±0.5 mm)

Uses a heated nozzle to extrude thermoplastic filament layer by layer, ideal for creating durable and functional prototypes. Commonly used in manufacturing, automotive, and consumer products.

DLP

510x280x350 mm

0.5 mm

1 mm

±0.30 mm < 100mm;
±0.3% > 100 mm

Uses a digital light projector to cure liquid resin layer by layer, providing fast and precise prints with high resolution. Commonly used in dental, jewelry, and high-detail prototype applications.

Large Scale

2500x2500x4000 mm

3 mm

-

±5 mm/mtl

Uses a digital light projector to cure liquid resin layer by layer, providing fast and precise prints with high resolution. Commonly used in dental, jewelry, and high-detail prototype applications.

DED

1200x800x600 mm

-

-

-

Uses an electron beam to melt and deposit metal powders or wire, ideal for repairing or adding features to metal parts in aerospace and manufacturing.

Bindet Jet

430x310x150 mm

-

-

±3% mm

Involves depositing a binder material onto a powder bed to form parts, which are then sintered. Useful for producing complex, cost-effective parts, often used automotive, aerospace, and consumer goods industries as well as jewerky.

Pros & Cons of DLP 3D Printing

Pros

Exceptional surface quality and fine details

High resolution and accuracy (sharper details)

High-speed production with precise curing

Ability to print transparent components

Isotropy in mechanical properties

Suitable for medical and industrial applications

Cons

More fragile than thermoplastic-based 3D printing

Limited material options compared to SLS or FDM

imited UV resistance

Durability: photopolymers are not stable over time

Post-processing (support removal, curing)

FAQ about our DLP 3D Printing service

What are the mechanical properties of DLP 3D printed parts?

DLP 3D printed parts typically exhibit excellent surface quality and high detail accuracy. Depending on the material used, they can range from rigid and strong to flexible and impact-resistant.

What are the dimensional tolerances of DLP parts?

DLP parts typically achieve dimensional tolerances of ±0.30 mm for features under 100mm and ±0.3% for larger parts. The accuracy varies depending on material, part geometry, and post-processing.

What are the design constraints for DLP?

DLP provides great design flexibility, but key considerations include:SLA offers significant design freedom, but there are still some constraints to consider:
- Minimum Feature Size: Typically 1 mm to ensure durability.
- Fine Features: Can achieve details as fine as 0.5 mm, making it ideal for intricate designs.- Supports: Required for overhangs and complex geometries to print the parts which needs to be removed after printing.
- Surface Finish: Parts have a smooth surface but may require additional coating or polishing for enhanced aesthetics.
- Support material: parts are connected to the construction platform requiring support material which needs to be removed after the printing

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