Sumitomo Plastics Machinery all electric plastic injection molding machines manufacturer

SE-DU Series Injection Unit Features

To meet diverse molding requirements, Sumitomo Plastics Machinery's SE-DU Series all-electric injection molding machines are available with a choice of injection units (except the SE18DU).

The advanced, low inertia design of the injection unit's direct-drive motors provides:

Higher injection power (torque) and velocity - with injection speeds up to 500mm/sec, and injection pressures up to 2900 kgf/cm² for the most demanding applications

Unerring velocity control from .01 mm/sec to the maximum velocity, for improved precision on wide range of parts including thick-wall lenses, visually critical and thin-wall parts

Faster velocity response, unaffected by belt elasticity, well-suited for narrow pitch connectors, micro-sized parts and other parts with extremely tight tolerances

This diagram shows the compact, low-inertia, direct-drive configuration of the SE-DU injection unit. The motor for injection uses a load cell to provide feedback that dictates the speed and torque required for precision injection pressure. The screw drive motor works together with a position transducer.

The high torque of the direct-drive, screw drive motor, as compared with a belted motor, is a particular advantage for high-viscosity resins. And compared with a hydraulic machine, the SE-DU requires fewer control devices because there are no proportional and directional valves needed to control hydraulic flow and pressures.

The SK-II, the industry's most advanced injection control, is available to help molders achieve the highest levels of injection fill precision and peak pressure stability. (Control software now standard; screw tip optional.)

Superior temperature control, provided by the following features, is another advantage of the SE-DU:

New double-shield barrel cover

Heater burnout monitor

Addition of temperature control for the nozzle added as standard

Synchronized heat-up

New water cooling jacket temperature control device

Other SE-DU injection unit features include:

Programmable switchover from velocity to hold - selectable by position or pressure

Hold pressure settable and accurate to 1kgf/cm² from 0 to 2400 depending on machine size

Flash speed mode, designed for injection speeds of 300mm/sec and higher, provides fast response control of velocity and pressure, before and after V/P switchover. It is used to prevent short shots and warp from over-packing.

Synchro-plast control mode, now added as a standard feature, is ideally suited for resins with low viscosity or uneven pellet size. In this mode, control of both the screw position and back pressure are optimized, ensuring plasticizing stability.

PID temperature control system that optimizes melt conditions with 2-second sampling and 0.1°C settable barrel zones

For specifications, standard and optional equipment and to read more about SE-DU Series injection molding machines, please use the SE-DU Info buttons at the top right of this page.

SE-DU Info

Brochure pdf