9 - AHP Merkle GmbH

Basic information about hydraulic cylinders en
Stamping cylinder (STZ)
The stamping cylinders are a further development of the block cylinder. A characteristic feature of stamping
cylinders is that thanks to the special design and arrangement of their seals and guides they can absorb the
large dynamic loads that are generated during stamping.
Screw-in cylinder (EZ)
The most space-saving option among AHP Merkle hydraulic cylinders are the screw in cylinders. Because these
cylinders are screwed directly into the tool, the tool functions as a housing. The customer / user only has to
create the mounting bore with the associated intake bores for forwards and return travel in the tool. There
are both single-acting and double-acting options.
Core pull units (KZE)
Core pull units are primarily used in mold construction, but can also be used for other applications in which
precise guiding is needed. By using these units, the user does not need to design an elaborate guide, such
as those required with core pullers. The core pull unit is designed so that the entire piston surface is acted upon
for „pulling“. Unlike with a pulling cylinder, this means that a smaller piston can be used with the same
operating pressure. The space savings with this design can be up to 35% compared to conventional solutions.
The precise guiding of the slide is ensured through the use of cross roller guides.
Rotating clamp unit (SZ)
These double-acting rotating clamp units are used wherever clamping points or clamping locations in fi xtures
have to be unobstructed in order to feed and remove workpieces more easily. Two versions are available.
Both versions have angles of defl ection of up to 90° and make the required action space available for the
workpieces during the release phase in order to avoid collisions. This increases the service life of a clamping
solution with rotating clamp units. The nitrided housings provide a low-wear surface, which further increases
the service life of the clamping elements.
Hydraulic cylinder with external guide (HZF)
These hydraulic cylinders are available with external guides for max. pressures of up to 160 bar (2320 PSI).
The cylinder liner is plasma nitrated and suitable for use as a guide. These cylinders are used very often in
aluminum die casting systems.
Rotary drive units (DA)
There exist hydraulic rotary drives with angles of rotation from 0° to 720° and torques of up to 1,400 Nm
(1,032.59 foot-pound force). Here the rotational motion is achieved via a hydraulically driven rack-and-pinion
system. Thus this type of kinematic system is not comparable to those with hydraulic motors.
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