Author: depehz

The jewellery industry global scenario in time of Covid-19 a speech by Sara Giusti Abstract The jewellery industry has been severely affected by the Covid19 pandemic. World demand dropped sharply in 2020, hitted by shop closures, stop in tourism flows, decrease in purchasing power across global consumers, increase uncertainty and gold prices at maximum levels. The scenario for 2021 remains highly uncertain, depending on the evolution of pandemic, with a rebound in demand that will still leave jewellery market well below 2019 levels. The Italian jewellery industry in 2021 World demand...

Additive manufacturing of platinum alloys – practical aspects during LPBF of jewellery items a speech by Ulrich Klotz Abstract In the present paper, optimum process parameters were determined for typical 950Pt jewellery alloy. Optimum densities of <99.9% were reached for a wide range of processing parameters. However, the resulting density was found to depend significantly on the part geometry and on the chosen support structure. The supports have to take into account for the geometrical orientation of the part relative to the laser build direction and the orientation on the...

Precious metals: transitioning into a post-pandemic world a speech by Daniela Corsini Abstract In 2020, the Covid-19 epidemic disrupted global supply chains and boosted demand for safe-haven assets. In 2021, the global gold market should benefit from a rebound in jewelry demand and a supportive macroeconomic environment amid expansionary monetary policies, low interest rates and a pick-up in inflation expectations. Commodities: hit by Omicron and monetary policies The negative impact of the Omicron variant and the threat of more restrictive monetary policies now represent the worst...

Lithography-based metal manufacturing of jewelry and watch cases made from 316L stainless steel and titanium alloys a speech by Carlo Buckhardt Abstract In order to overcome existing restraints in the in-service behaviour of currently available additive manufacturing (AM) materials’ sets, an advanced production method for high performance technology metals was developed on the basis of a modified vat polymerisation-based (VP) printing for metal powders. The new lithography-based metal manufacturing (LMM) process is able to photoharden highly filled innovative metal-photopolymeric...

THE EVOLUTION OF PLATINUM JEWELLERY ALLOYS: FROM THE 1920s TO THE 2020s a speech by Christopher W Corti Abstract Platinum has only been known to Europe since the 16th century. This was impure platinum which is found as grains of native metal in alluvial deposits, often associated with native gold. Such grains are mainly platinum alloyed with the other 5 platinum group metals and were exploited by pre-Colombian Indians of Ecuador and Colombia in NW South America. In more recent times, the popular use of platinum in jewellery dates from the early 20th century, often as a basis for diamond...

Progress in titanium investment casting a speech by Florian Bulling Introduction Titanium alloys are known for their high mechanical strength, low density and high corrosion resistance. Therefore, their application is mainly in the field of aerospace industry, but also in medicine as implant material. The alloy Ti-6Al-4V, also known as Grade 5 titanium is the most widely used alloy. Other titanium-based alloys are the intermetallic compounds NiTi, known as Nitinol®, which is used for its superplasticity as stent material or as actuator. Another important alloy is the intermetallic...

Geometry driven parameters and relevance of open material system for jewelry additive manufacturing. a speech by Marco Giuseppe Andreetta Sisma, a growth journey of more than sixty years More than 40 years in jewellery making machines, more than 60 years in micromechanics More than 20 years in laser manufacturing and laser based process expertise More than 10 years in manufacturing of metal 3D printing machines designed for small and complex...