It’s All About Speed at Sumitomo (SHI) Demag
Sumitomo Demag all-electric toggles and hybrid injection molding machines are molding high-speed medical and packaging applications.
Sumitomo (SHI) Demag has brought 12 machines to NPE, eight of them in its own booth and four in others’. Seven of the 12 are members of the latest SEEV-A all-electric toggle line, spanning the full size range (56 to 562 tons) of this platform. The larger models are aimed in part at automotive molders, due to their ability to carry larger, heavier and more complex molds than some electric machines in the past. At the show, SEEV-A machines are running medical and packaging applications, as well:
• Molding eight thin-wall medical dosing cups in 3 sec.
• High-speed molding of medical pipettes in 32 cavities.
• Injection-compression molding with IML to produce a thin-wall food-container lid on a 4-sec cycle.
• Molding a vacuum-cleaner fan component with fast color change.
In addition, an El-Exis SP 300 ultra-high-speed hybrid is running 72 high-precision water caps on a 2-sec cycle. Sumitomo Demag also is demonstrating micromolding of a DNA-free, high-clarity sample collection tube with a wall thickness of 0.250 mm.
Ultimate Control for the Toughest Molding Jobs
Hard/soft overmolding has become a fundamental technique for injection molders in recent years, and a growing number of molders are extending that technology thermoset/thermoplastic combinations.
The accepted ground rule for balancing melt flow in multi-cavity injection molds is to achieve equal flow distance from the injection point to each cavity.