18/12/25
Raplas Technologies, a UK-based manufacturer specializing in resin additive manufacturing, has recently launched a new industrial 3D printer: the PR 400i. Staying true to its long-standing expertise in stereolithography (SLA), Raplas introduces an innovative approach to the DLP process, combining image projection with advanced control of resin chemistry.
Unlike conventional DLP or LCD systems, which are often limited by acrylic-based materials and issues related to deformation or build size, the PR 400i relies on a top-down architecture with a dual projector. This configuration makes it possible to overcome the usual constraints of bottom-up systems and to avoid cooling effects that typically restrict the production of large parts.
The PR 400i transfers Raplas’ SLA expertise to an image-based system capable of independently managing different zones of a part: outer and inner contours, in-skin, up-skin, and down-skin. Each zone benefits from a specific exposure profile tailored to the chemistry of the resin used. This approach significantly reduces shrinkage effects and enables the production of precise, repeatable, and high-quality parts.
In terms of surface finish, the machine delivers results comparable to SLA systems, with support structures ranging from 50 to 250 micrometers, while offering flexibility in printing speed.
The PR 400i features a build volume of 420 × 384 × 400 mm and is equipped with dual 405 nm projectors. It integrates industrial-grade components, a solid granite structure, reliable axes, and advanced optics that enable hardware-level antialiasing, not just software-based. All components are standardized, ensuring easy maintenance and straightforward replacement if required.
Thanks to its image-based operation, the PR 400i fully supports Raplas’ SmartBuild solution. This technology allows the build to be divided into sections, with different layer resolutions depending on part geometry. Straight sections can be processed with larger steps, while angled or curved areas use finer resolution, optimizing build time without affecting projection time per layer.
The PR 400i is strictly intended for industrial use. It targets applications that require both high precision and large-format parts, particularly in the aerospace, defense, and automotive sectors. Universities and research institutes have also shown interest in the system.
The machine is an open material platform: Raplas qualifies each resin and integrates it into a dedicated library for plug-and-play use, while also allowing users to work with their own resins, either independently or with Raplas’ support.
With the PR 400i, Raplas continues to push the boundaries of resin 3D printing, delivering an industrial solution built on precision, reliability, and repeatability, backed by expertise exclusively focused on stereolithography.
Source : 3Dnative
FR
