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Shear Presses

Shear Presses

The shear presses are used to cut and compress scrap.
IMABE Iberian manufactures three types, fixed, mobile and transportable:

  • Fixed. Still presses are robust and powerful machines designed for self-supporting structure remain many years in the same place. They are identified by the initials Shear Press (CP).
  • Mobiles. Mobile Shearing Presses, however, are mounted on wheeled chassis and are designed with the proper width for transport on public roads so as not to obstruct traffic. Mobile IMABE models carry PCM or PM.
  • Transportable: Transportable shears are built with four hydraulic legs that serve to raise the presses so they can be loaded into a platform for further transport to another patio. They are the combination of mobility and robustness.

Cutting Forces and Compaction

The most important thing to consider when selecting a press shear strength is cut, which is measured in tonnes factor. Is the force with which the movable blade of the cutter strikes the material. On machines manufactured IMABE, this value is also reflected in the model number. So PC800 identifies a set of 800 tons of press force; PCM500 while a 500 ton mobile. When the press has a drawer on the side feeder, is identified by the letters PCL.

Cutting forces and compaction are provided by a hydraulic system that uses Pascal's principle, whereby the force applied to an incompressible fluid remains constant. On a small piston exerts minimal force and this displaces a volume of liquid that in turn drives a large piston. To crush and compact the material to be recycled, in modern presses are still using the same concept developed in the late eighteenth century by the prolific English inventor Joseph Bramah, who perfected the same toilet as we know it today.

All the power is generated by a motor, which can be electric or diesel, depending on the model is fixed or moving.

Operation

Basically, the presses operate like giant shears scissors. A blade descends parallel to a fixed blade acting lever. The blades cut the package material into two parts to overcome the resistance of the same. The sash designs almost always biased, as the guillotine of the French Revolution, because that way it significantly reduces the required pressure.

The leaves of no scrap shears are sharp, to avoid nicks. All the cutting process depends on the pressure of the lower sash, hence large hydraulic forces needed.

Sheared material is placed in a feeder drawer. Immediately, it is pre-compacted by a side or a couple of covers or folding wings attached to the sides of the box car. A pre-packed turn scrap can safely pass through the mouth of shearing. Then, the piston pushes the bundle side to the shear and compresses further. The blade and cutting down occurs; Finally, the pieces fall through the scrap outlet, ready to carry casting.