Magnetic Fixture Design and Cost Considerations

A magnetic chuck is nothing more than an assembly of steel and magnetic materials used for creating a force. This brief paper will help to illuminate some design aspects of magnetic chucks and how they relate to the cost. There are three primary classes of magnetic chucks: permanent magnetic chucks (manually actuated), electromagnetic chucks, and […]

Understanding Magnetic Flux Behavior

Magnetic flux is a measurable quantity of a magnetic field over a given area.  Flux lines are often used to depict the direction of flux as it flows from the north to the south pole of a magnet.  The greater number of these flux lines the greater the density of the flux and ultimately, the […]

Switchable Magnets Explained

Electro Magnets A simple electro magnet shown (fig.1) incorporates a coil of N turns wrapped around a ferromagnetic steel horseshoe. Direct current is applied to the coil which creates a magnetic force perpendicular to the coil. Magnetic flux passes through the poles of the horseshoe which will then influence any ferromagnetic material that comes within […]

A Molders Guide to Magnetic Quick Mold Change Systems

Having established a need to improve mold changeover time, when deciding upon the clamping process, the molder is confronted by three technology choices.. • Manual-Mechanical – typically for smaller presses.  Involves the mold being modified to accept some kind of clamping ring or spigot.  Specially designed plates are mounted to both platens which through the use […]