injection ram

injection ram

[in′jek·shən ‚ram]
(engineering)
In injection molding, the ram that applies pressure to the feed plunger in the process of either injection or transfer molding.
References in periodicals archive ?
Because of the compressibility of the melt in the runner system, RJG recommends slowing the injection ram just before the cavities are completely filled.
The unit performs closed-loop control of the injection ram position, injection speed, holding pressure, screw speed, decompression (suckback) and backpressure.
This is done by a design, which has a separate closing extruder, closing an injection ram through the nozzle.
During molding, the injection ram pushes the liquefied plastic into the runner system and the flow forms a front when it enters the mold cavity.
In effect, X-Melt uses the energy stored in the pressurized melt to fill the mold without moving the injection ram.
The design features a separate dosing extruder, dosing an injection ram through the nozzle.
The small diameter of the torpedo provides much finer control of packing and holding than does the much larger-diameter injection ram, says Dray, thereby providing tighter control of ultimate part quality.
This is done by a design which has a separate dosing extruder, dosing an injection ram through the nozzle.
In those cases, only the injection ram could be connected to the existing hydraulic system and a small oil hydraulic power unit was added to operate the screw motor.
Two ball screws drive the injection ram through a nut filled with precision ball bearings, says Mark Zulas, U.
Injection-control program is a self-adaptive, closed-loop position control of the injection ram, which ensures precise shot and decompression control.
The desired injection ram speed (forward motion of the screw) for a single-cavity mold is about 200 mm/sec and about 1000 mm/sec for a 16 + 16 cavity stack mold.