Page 49 - Plastics News July 2017

PRODUCT NEWS

Nissei introduces NEX-IV presses

apan based Nissei Plastic Industrial Co. Ltd. has Nissei’s stable plasticization and high-precision metering
Jintroduced its NEX-IV, the fourth generation of its all- of the injection unit, and the company claims the flat
electric injection molding machine. The NEX-IV Series clamp type clamping unit transmits stable and uniform
includes these features: pressure by its linear pressure toggle mechanism.

• Increased precision and speed, though a newly designed
toggle mechanism that can cut the mold open/close Wittmann adds to its G-Max
cycle time by 5-20 percent. The Flat Clamp has been
further developed to improve the evenness of its contact granulator series
pressure. To improve clamping precision, linear guides
come standard. Combining that with the “Precision
Metering” function, ittman has added latest models G-Max 12, G-Max
which maintains the W23, and G-Max 33 model that completes the G-Max
consistency of metering granulator series. The latest model in a series of flexible,
density and injection custom-made and belt-driven compact granulators, the
volume, the press gives G-Max 23 is specifically designed for the closed-loop
very stable, precision recycling of sprues/runners from injection moulding
molding with a high machines with up to 240 tons of clamping force. It is
level of repeatability, a portable piece of equipment which allows for great
a ccordin g t o t h e
company. NEX-IV presses versatility and can be moved easily from one moulding
offer one of the widest daylights in the industry while machine to another. This granulator operates with
keeping its footprints to the smallest size. Adding up to low energy consumption and is equipped with sound
100 millimeters to the daylights allows a big increase insulation for the cutting chamber, greatly reducing the
in the range of mold thicknesses allowed. One can use overall noise level.
larger molds in smaller machines, in conjunction with the It is powered by an
low-pressure molding method. A low-inertia servomotor IE2 motor for high
is combined with Nissei’s original injection unit and its energy efficiency.
control that gives a higher speed/response/pressure With the G-Max
injection, and optimized barrel temperature control. 23, a granulating
These technologies expand the range of molding, and t hroughput of
give high-precision injection and metering. High-precision 80 kg/h is made
metering control Pre-Pack II makes consistent metering po s sible. In
density and injection volume, improving yields even
when running regrinds or inconsistent materials. The co mmo n with
Linear Precision Toggle has characteristics similar to the other models of
straight hydraulic clamping system, using the advances the G-Max series,
of a toggle. Standard features are “automatic clamping the G-Max 23 allows a new way of working: A remote
force adjustment,” which automatically adjusts clamping control replaces the fixed electrical control panel
force fluctuations caused by rising mold temperature, usually used on granulators. Wittmann has added a
and “direct clamping force setting” that works while screen with conical holes, that make it easier for soft
the press is running. Nissei also added new features to tacky regrind to pass through the screen. This also helps
the TACT IV controller, including compiling important to minimise screen hole plugging; also an automatic
process information into on e large, 15-inch screen, where tensioning system for the belt means no maintenance is
each process id displayed in a color-coded chart. A new needed in order to keep the right belt tension; a rotor
material-change purging circuit cuts the amount of resin direction and missing phase detection and easy cleaning
used for purging, and the time to do it. Also new: a mold of the cutting chamber.
open/close response speed selector.The NEX-IV continues

49 July 2017 | Plastics News