Plastics Technology

AUG 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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Rupture Disc Can Be Alarmed Dynisco, Franklin, Mass., expanded its rupture disc offerings at NPE2018 with the model BP520 burst plug, This custom assembly with pop-top burst indication is installed on barrel bodies with hex ends, where the hex OD (across flats) is larger than the burst-plug body. The metal retainer strap is held in place by the hex and the metal T-shaped cap is fastened to the other end of the strip. A 2-mm hole is drilled through the body and cap. A burst-indicator (BI) wire is passed through the hole and when the disk ruptures, the T-cap "pops open" shearing off the BI wire and indicating a burst to the control system. 508-541-9400 • Small Electric Press Debuts In LSR Micromolding At its recent Competence Forum open house in Germany, KraussMaffei (U.S. office in Florence, Ky.) showed off the newest and smallest member of the highly modular, all-electric PX series of injection presses. The new PX 25 has 25 metric-ton clamp force; the rest of the line ranges from 50 to 200 m.t. It was demonstrated in an LSR micromolding application—a radial seal (pictured) with an intricate undercut and weighing 0.15 g. For this project, the press was equipped with a new injection unit housing a 12-mm screw. Cycle time was 14 sec. Addressing growing demand for both LSR and solid sili- cones in the U.S. and Asia, KM also introduced the new AZ 50 feeder for solid silicone rubber on a servo-hydraulic CX 200 two-platen press (pictured). The feeder has a rotating hopper and pulls the silicone downward using a continuously rotating stuffer screw. Rear ventilation allows air to escape upwards, unlike other systems that use a piston, which is more likely to result in entrapped air and bubbles in molded parts, KM says. 978-772-5100 • NJECTION MOLDING INJECTION MOLDING EXTRUSION New Models of Economical Robots Wittmann Battenfeld (U.S. office in Torrington, Conn.) has added larger and smaller models to its Primus series of simple, economical pick-and-place robots. These units, adapted from the W8 series, have three servo axes and a limited range of options. The first unit, Primus 16, has a payload capacity of 5 kg (11 lb) and was introduced at K 2016. The second model, Primus 14, debuted at Fakuma 2017 and was also shown at NPE2018; it can carry 2 kg (4.4 lb). Now there are also the Primus 10 (1.5 kg/3.3 lb) and Primus 26 (10 kg/22 lb), as well as Primus 26T with telescopic vertical axis. The largest models are suitable for injec- tion presses up to 400 metric tons, vs. a maximum of 250 m.t. previously. All Primus models come with up to four vacuum circuits and the R8 TeachBox control. 860-496-9603 • Primus 10 Primus 26 50 AUGUST 2018 Plastics Technology Injection Molding With Technology Keeping Up PRODUCT FOCUS

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