Mold-Masters Hot Runner, User Manual, Page: 311 / 319

Section 21 - Glossary of
Terms
EDM: Electrical discharge machining
TERMCON : Terminal connector
Aspect Ratio: Ratio of total flow length to average wall thickness.
Back Pressure: The pressure applied to the plastic during screw recovery.
By increasing back pressure, mixing and plasticating are improved; however,
screw recovery rates are reduced.
Backplate: Inlet component to the Hot Runner manifold.
Barrel : The part of the molding press where resin is melted.
B-side: The mold half that mounts to the moving side of the injection molding
press. Sometimes referred to as the core side of the mold or the Cold Half,
the B-side has ejector pins to push the part out of the open mold. An analysis
of the part geometry determines the optimal part orientation to ensure that it
will remain on the B-side when the mold is opened
Cast-in Heater Element: A heater element that is brazed in the manifold.
Clamp Force:
The force required to hold the mold shut so resin cannot
escape during injection.
Con.: Connector
Contoured Pins: Ejector pins with the ends shaped to match a sloping
surface on the part.
Core: A convex feature on either side of the mold that will enter an opposing
cavity when the mold is closed. The void between the cavity and core is
where the resin solidifies and forms the part. Often the B-side of a mold is
referred to as the core side.
Core-cavity: The design of a mold where the A-side forms the outside of the
part and the B-side forms the inside. The advantage to this approach is that
the part will shrink onto the B-side so it can be ejected, and if the inside and
outside are drafted with equal and opposite draft the wall thickness will be
constant.
Cycle Time: The time it takes to make one part including the closing of the
mold, the injection of the resin, the solidification of the part, the opening of the
mold and the ejection of the part.
Cavity:
The space inside a mold into which material is injected.
Clamp: The part of an injection molding machine incorporating the platens
that provides the force necessary to hold the mold closed during injection of
the molten resin and open the mold to eject the molded part.
Clamping Plate: A plate fitted to a mold and used to fasten the mold to a
platen.
Clamping Pressure : The pressure applied to the mold to keep it closed
during a cycle, usually expressed in tons.
Closed-loop Control: System for monitoring complete, injection molding-
21-1 GLOSSARY OF TERMS
Hot Runner User Manual
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