Hydraulic Press Terms and Buzzword Explained
Filed Under Hydraulic Shop Presses |
Here is a list of Hydraulic Press Terms you will encounter while doing your research:
Actuator – An actuator changes fluid or liquid power into mechanical movement.
Age – Amount of time necessary to pause between the molding and evaluation of molded part properties.
Backrind – A defect at the parting line where material has been reduced in size inside the part.
Bed – The flat surface the material you are working with rests upon.
Bolster – Plates attached to rods which carry the platens, or any structure mounted to the bed of a press. Sometimes these have the option of being removable.
Check Valve – There are several kinds and types of valaves, but generally valves which allows flow in a single direction.
Compression Set – After removal of the force there is often a lingering deformation. For instance, if you use your fingernail to press into a molded sample; the impression or “indentation” which lingers is the compression set.
Contact Gauge – A feature of hydraulic press systems that turns the system off and on at set pressure points.
Cylinder Assembly – The cylinder, piston, ram, seals and packing of a press.
Daylight – The largest capacity, vertically, that the press can handle or the vertical clearance from the underside of the ram to the top of the bolster. The ram must be in its maximum up position.
Die – The tooling used in a hydraulic press for shearing, punching, forming, drawing or assembling metal or other materials.
Gate – The final opening through which injected material flows in order to enter a part cavity.
Heat Exchanger – Circulates air or water to maintain oil at operating temperature.
Hydraulic Pressure – Pressure caused by fluid under applied force.
Hydraulic Cylinders – Actuation devices that produce linear motion and force through the use of pressurized hydraulic fluid.
Hydraulic Pump – Pumps that use mechanical energy to deliver high-pressure fluid flow to the outlet through pressurized fluid.
Hydraulic Seal – A device that restricts the escape of fluid or entrance of foreign material.
Hydraulic Valve – A device that contains and transfers the flow and pressure of hydraulic fluid in hydraulic power systems.
Knockout – A device to knockout the die or punch.
Low Pressure System – Allows the hydraulic press to operate continuously under 10% of its maximum rated force. I also ensures a preheat function at reduced pressure.
Platen – Where the mold attaches. A series of flat surfaces where one surface is stationary and the other is mobile.
Rod or Tie Rod – Usually a long stem or pole to connect the two pieces of the press enabling them to act in concert.
Shut Height – The clearance over the bed with the ram full down.
Sprue – Main feed guide that runs from the outer face of an injection mold gate into a single cavity mold or to runners in a multiple cavity mold.
Stroke Control – Often an additional feature to control length of stroke and can be adjusted accordingly.
Throat Clearance – This is the distance between the frame member behind the hydraulic press bed to the vertical centerline of the ram. This measurement usually affects the size of material to be used.
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