exhibition news

Tool and mould making industry


Core pull interlocking cylinders
Mould attachment injection molding tools - die casting
Two standardised installation lengths. Strokes from 10 up to 100 mm.
Option: customer specific modifications and dimensions always possible. 100% more holding forces in the locked position by means of enlarged piston diameter.

3D Engineering Data Configurator

Click here for more information about preload selection.


Phases 1 to 4: The mode of operation is similar to series CP-H...-L, but here the segments create an additional preload to provide that the core touches the mould surface reliably. The locking slide and segments have a characteristic cone shaped contour which enables the piston rod to lock within a defined tolerance range. Elasticities which can occur commonly in the mould construction are compensated. This tolerance range in the final position can reach up to 1 mm stroke. The self-inhibiting locking is maintained permanently and as a result the pressure supply is not necessary. In this range a preload is generated that guarantees reliable operational process and high workpiece quality. The red curve displays the force distribution as it is achieved in the locked position with positive lock. Core and piston rod withstand the high counter pressure during the following injection cycle definitely. The core does not recede!


completely exposed core, not touching core (series CP-H..-L) Phase 1: In the initial position the piston rod is retracted. Phase 2: The piston rod is extended by applying hydraulic pressure on the piston side. As soon as the piston reaches the final position, the locking slide moves axially over the three-dimensional locking segments and pushes them into the annular groove of the rod . So the segments are fixed in radial and axial direction. The piston rod is clamped with positive lock. The hydraulic pressure is switched off, providing a maximum of operational safety. Phase 3: During the injection process the core is pressurised, but it doesn't recede in any case. The piston rod always reaches the defined final position. The hydraulic pressure is branched off with a by-pass drilling from the main supply ports for extending and retracting, enabling very fast stroke cycles. Phase 4: The release port is pressurised, the piston rod unlocks and moves back to the initial position.