Tech Focus: Surface Treatment & Repair Perfect polish for 3D printed removable partials

| Editor: Steffen Donath

The Teamziereis GmbH expands its customer services with an innovative electropolishing system from AM Solutions – 3D post processing technology

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Among other 3D printed components the removable partials are polished with the dry electropolishing system.
Among other 3D printed components the removable partials are polished with the dry electropolishing system.
(Source: Teamziereis GmbH)

By investing in the innovative dry electropolishing system DryLite the Teamziereis milling centre, specialised in dental products and job shop services, expands its service portfolio. The DLyte 10D system allows the automatic polishing of components produced with additive manufacturing and hybrid manufacturing. It places an excellent polished finish on removable partials, dental crowns and products for orthodontic treatments.

Ralph Ziereis, General Manager of the Teamziereis GmbH milling centre, explains how he found the dry electropolishing system: “A customer told us about the innovative DLyte polishing method. Subsequently we informed ourselves about this technology and its possibilities at the AM Solutions booth during the 2019 Formnext show.”

Within the scope of its digital concept the company produces removable partials, dental crowns and components for orthodontic treatments, for example, filigreed wires, from cobalt chrome alloys with a powder based selective laser melting 3D printing system. After they were printed these components had to be manually polished. This costly operation usually took place in dental labs. Ralph Ziereis comments: “To relieve our customers from this time consuming and expensive operation and to be able to offer another service, we had been looking for a suitable mechanical polishing method and with the DryLyte technology we finally found it. This system saves our customers not only a lot of money and time, but it also produces absolutely repeatable, high-quality polishing results.” By using the DLyte 10D, processing time can be reduced by up to 80 % compared to manual work, depending on the application. Furthermore, several parts can be processed simultaneously.

Dry, non-abrasive electropolishing

This high performance electropolishing system, developed by the Spanish company GPAINNOVA, utilises dry electrolyte granules instead of a liquid. During the polishing operation the work pieces, mounted to special fixtures, are passing through the electrolyte with a rotary movement. This causes an ion exchange between work piece and electrolyte with the result that the roughness peaks on the entire surface, including internal passages, are eliminated. Compared to the conventional electropolishing method the use of non-abrasive electrolyte granules maintains the original geometry, dimensions, edges and angles of the work pieces. This guarantees a perfect fit.

Ralph Ziereis, General Manager at Teamziereis.
Ralph Ziereis, General Manager at Teamziereis.
(Source: Teamziereis GmbH)

Test trials ensure optimal finishing processes

A defined gloss, no change of the work piece geometry, dimensions and edges and, above all, a flawless surface finish, these were the results Ralph Ziereis demanded. AM Solutions – 3D printing technology, a Rösler division specialized in post processing of 3D printed components and sales partner of GPAINNOVA, conducted initial test trials in its technology center. These trials quickly demonstrated that the DryLite system is absolutely suitable for the finishing tasks defined by Teamziereis. Ralph Ziereis continues: “Once we saw, how easy it was to produce the desired surface finish, we decided to purchase the compact and flexible system DLyte 10D.” The definition of the processing parameters for the different work pieces was determined by the composition and size of the electrolyte granules and the processing time. Ralph Ziereis adds: “The experts of AM Solutions helped us a lot in working out the details of the work piece specific processing programs.” All programs can be stored in the equipment controls and called up by simply pushing a button.

Ralph Ziereis concludes: “The automatic polishing is an ideal addition to our service package and makes our manufactured components a lot more attractive for our customers.”