Roemheld mould

Quick change of moulds at high operating temperatures

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  • Magnetic clamping technology with controller meets Press Standard EN 289
  • Permanent magnets hold heavy mould halves of several tons
  • Roemheld at DKT/IRC 2015

The magnetic clamping technology reduces set-up times to just a few minutes, an advantage that plays an important role especially at high operating temperatures. In addition, using magnetic force to clamp the mould reduces the risk of an accident as the machine operator does not come into direct contact with the hot working surfaces. In order to comply with the new EN 289 Press Standard for plastic and rubber machines, the clamping technology specialist Roemheld has introduced magnetic clamping plates with a controller.

Permanent magnets hold heavy mould halves of several tons

During production, power-independent permanent magnets provide the necessary force to reliably hold heavy mould halves, even at weights of several tons, without deforming them, while keeping them accurately positioned and parallel. The large degree of precision during production also reduces mould wear at the same time. Because the magnetic field only penetrates a few millimetres into the mould, it has no impact on production.

Roemheld mould from Wickert

As compared to the previous standard, the new version of DIN EN 289 defines regulations for the use of magnetic clamping systems for the first time ever. Shown in the picture is a bottom HILMA magnetic clamping panel from Roemheld installed on a Wickert press (photo: Wickert).

Magnetic clamping plates meet highest safety requirements

The clamping technology specialist points out that the HILMA magnetic clamping plates of the M-TECS series are currently the only ones that meet the new version of the European standard that went into effect in January 2014. They comply with the highest safety requirements with regard to the relevant signals such as mould monitoring, power supply, magnetization, emergency stopping at performance levels “d” and “e”.

All safety signals and error messages are displayed on the control panel and, as an option, are simultaneously transmitted via RS or Profibus interfaces to the press controller. In addition, status data can be forwarded to additional output devices for remote maintenance and for monitoring tasks.

Designed for use at operating temperatures of up to 240° C

The new controller is available for all magnetic clamping plates of the M-TECS series. They belong to the quick clamping system, which allow dies and moulds of any size, geometry and weight to be positioned and clamped within the shortest amount of time. A variety of quick clamping system variants are available that are designed for use at operating temperatures of up to 240° C. All magnetic clamping plates are available with an optional integrated heating unit and are delivered in customized sizes and geometries. They can be easily retrofitted to already existing rubber die presses, injection moulding machines, mould carrier systems and transfer moulding, irrespective of whether they are operated horizontally or vertically. The combined use of long poles and square poles takes full advantage of both technologies: The high force concentration of the long poles and the inexpensive design of the square poles.

The company will provide an overview of its product range at the DKT/IRC in Nuremberg, Germany. Among the products are, for example, powerful block cylinders, electrically operated clamping elements and mould-changing technology and a mould transport cart with automatic docking function for weights of up to 500 kg.

Main Picture: Magnetic plate up to 230°C with integrated roller conveyor segments to easily change moulds (photo: Roemheld).

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