Continuous Liquid Interface Production (CLIP)

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Despite industry advances, traditional approaches to additive manufacturing force trade-offs between surface finish and mechanical properties. In contrast, DLS (Digital Light Synthesis) enabled by Carbon’s proprietary CLIP technology, is a breakthrough process that uses digital light projection, oxygen permeable optics, and programmable liquid resins to produce parts with excellent mechanical properties, resolution, and surface finish

TRADITIONAL

3D printed parts are notoriously inconsistent. Their mechanical properties vary depending on the direction the parts were printed due to the layer-by-layer approach.

DLS

Parts printed with DLS are much more like injection-molded parts. DLS produces consistent and predictable mechanical properties, creating parts that are solid on the inside.

BENEFITS

Isotropic parts with exceptional surface finish

Conventional 3D printed materials often exhibit variable strength and mechanical properties depending on the direction in which they were printed. DLS parts behave consistently in all directions. The resolution and gentleness of our process — where parts aren’t harshly repositioned with every slice — make it possible to exploit a range of materials that have surface finish and detail needed for end-use parts.

Two-stage approach

Our breakthrough DLS process is driven by Carbon’s groundbreaking CLIP technology and programmable liquid resins. CLIP, as reported in the most prestigious research journal, Science, uses digital light projection in combination of oxygen permeable optics. Traditional additive approaches to photopolymerization typically produce weak, brittle parts. Carbon overcomes this by embedding a second heat–activated programmable chemistry in our materials. This results in high–resolution parts with engineering–grade mechanical properties.

Light shapes the part

CLIP is a photochemical process that carefully balances light and oxygen to rapidly produce parts. It works by projecting light through an oxygen-permeable window into a reservoir of UV-curable resin. As a sequence of UV images are projected, the part solidifies and the build platform rises.

  • BUILD PLATFORM
  • RESIN
  • OXYGEN-PERMEABLE WINDOW
  • DEAD ZONE
  • LIGHT ENGINE

The dead zone

The heart of the CLIP process is the “dead zone” – a thin, liquid interface of uncured resin between the window and the printing part. Light passes through the dead zone, curing the resin above it to form a solid part. Resin flows beneath the curing part as the print progresses, maintaining the “continuous liquid interface” that powers CLIP.

Heat sets the properties

Once a part is printed with CLIP, it’s baked in a forced-circulation oven. Heat sets off a secondary chemical reaction that causes the materials to adapt and strengthen.

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