The Langzauner LZK-OK 130 Press, the first of a new product series featuring variable-speed hydraulic drives.
The Langzauner LZK-OK 130 Press, the first of a new product series featuring variable-speed hydraulic drives.

The new LZK-OK 130 press employs the latest variable-speed hydraulic drive technology, and according to Langzauner is the first of its kind on the market that can handle all pressing techniques, including resin transfer moulding (RTM), prepreg and injection moulding.

The LZK-OK 130 is said to set new standards of precision whilst reducing energy usage and lowering operating noise levels. It is expected to be very attractive to the automotive and aerospace sectors, as well as for R&D facilities.

Variable speed drive

Development of the new Langzauner press marks a move away from conventional proportional valve technology for the hydraulic unit, to a variable-speed drive where an internal gear pump, driven by a servo motor, generates the precise amount of pressure ‘on demand’. The whole pressing procedure is menu-controlled and control tasks are carried out via an optimised operating system, with 15” touch-screen, which also records operating data to CSV files.

All the parameters and functions can be configured individually – from the pressing power and closing speed, to the strength and duration of heating. The demand for accuracy is fully met thanks to a pressure deviation of around 1%, together with a capability of pressing to size at a tolerance of ±0.01 mm.

The thermo-oil heating and cooling device is fully integrated and, via the flexible press ram and sliding table, directly and indirectly-heated moulds can be utilised or panels can be accommodated. Loading and unloading the press is performed externally using a driven sliding feed table.

Personel safety protection around the press includes a vertical sliding door, with viewing panel, which closes once the work-piece is in position. The press is further protected by light barriers and fixed grills.

Austrian manufacturer Langzauner is represented in the UK by CD (UK) Ltd.