SLA stereolithography: Ultraviolet light irradiates liquid photosensitive resin, curing layer by layer to form the part.

MJF Multi Jet Fusion: HP process, the top choice for mass production of nylon parts, high efficiency, uniform surface, suitable for large batches of plastic functional parts.

PLA: Easy to print, no odor, high hardness; brittle, not heat-resistant, suitable for appearance models and educational parts.

Mainstream: 316L stainless steel, AlSi10Mg aluminum alloy, TC4 titanium alloy, and tool steel.

Yes. Some food-grade PLA, specific medical resins, and medical titanium alloys have passed compliance certifications and can be used for food contact, dental, orthopedic implants, and surgical guides; ordinary industrial materials are not recommended for contact with food or the human body, and material certification reports should be checked when selecting materials.

Missing layers/incomplete printing: Check exposure time, whether the release film is damaged, and whether the platform is level.

Consumer electronics/home appliances: SLA/FDM (prototypes), MJF (small-batch structural parts)

Small-batch, customized products: Nylon MJF, SLS, some photopolymerization, and metal SLM can be directly mass-produced.

Plastics: FDM/SLS strength is generally lower than injection-molded parts, and pure 3D printing is not recommended for parts under high stress.
Metals: SLM-formed metal mechanical properties are close to forged parts, and in some scenarios, they can replace machining.

Support removal, sanding, polishing, painting, electroplating, sandblasting, heat treatment (stress relief for metal parts), dip coating (anti-powder infiltration for nylon parts), and curing (secondary UV curing for photopolymerization).

Yes. Currently, there are concrete 3D printing and large-format pellet FDM, used for construction, large tooling, sculptures, etc., focusing on large size and low-cost rapid prototyping.

No. The two are complementary: 3D printing excels at customization, small batches, complex structures, and R&D prototyping; traditional processes excel at large-scale, low-cost standard parts, and the two will be used in combination over the long term.