Injection Molding: Small Electric Press Debuts In LSR Micromolding
KraussMaffei adds 25-ton model to all-electric PX series of injection molding machines. First demonstrated in LSR micromolding. KM also introduces solid silicone feeder for bubble-free parts.
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 silicones 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.
The reason you dry certain plastics is to get the moisture out. But why does the moisture have to be taken out before processing?
It may seem like a dull topic, but it will overcome the emotional experience that follows when you put a new mold into a machine and you find out there is not enough barrel capacity to make a full shot.
Over the past decade, soft-touch overmolding has radically changed the look, feel, and function of a broad range of consumer products.