Focus on Steel 2017 | Page 18

18 Special screws New product range for the Proinvest Fasteners Division The acquisition by Proinvest Group of SCUDAS Pascani plant in 2015 led to the opening of the producing activity of special screws for industrial applications. The existing production facilities ensure the production of a variety of special screws, such as special screws with nut, special helical nuts, special screws with conical head, special screws for rectification devices, special customized screws, square head screws with special nuts, special head screws or special bolts. Design Prototype Historic The screws were invented about 2,400 years ago by Archytas of Tarentum (428 BC - 350 BC), who was a contemporary of Plato, sometimes called the founder of mechanics. The English, through Jesse Ramsden, set up the first industrial production line for these products in 1770. From a primitive form, given the fact that the first material used for their production was wood, screws have come a long way, becoming indispensable for almost any industry, currently having an extremely broad range of uses, including orthopedic surgery. Testing Production Logistics