A question of technology


Equipped with the best ideas, our customers economically manufacture high-quality castings by means of a wide product range including various pre-compaction technologies. Following pre-compaction, the homogeneous sand mould is finished in place by final compaction in a controlled mechanical process.

What counts is the mould: AIRPRESSplus technology from KW.

Faster, better, more efficient than ever for the hardest sand mould experience: pre-compaction using TWINPRESS. Here the pattern presses the sand upwards against the cylinders from below, causing an increased density in the vicinity of the pattern plates and allowing utilisation of the pattern plate edges. This is followed by final compaction from above. Completely new thereby is the patent-pending stroke adjustability and an interactive control.



Ready for the future: KW TWINPRESS – Adapt contours, self-regulated pressing-in of supporting cylinders, final compaction in its most modern form.

Our best pre-compaction: KW TWINPRESS.

Complex pattern contours are depicted in the best possible manner and display the same strength for all flask formats: The outcome is convincing.

Pre-compaction using AIRPRESSplus technology from KW.

When the situation deals with intricate moulding patterns, for instance patterns with considerable differences in height along with complex contour, heavy sand risers, KW AIRPRESSplus technology has proven itself extremely well on an international scale. A strong air pulse is applied to the sand, leading to a compaction front through the sand to the pattern plate. This kind of compaction ‘in a flash’ is available only at KÜNKEL WAGNER.

Final compaction using the KW multi-piston squeeze head.

Divided into individual pressure circuits, this method offers freedom in the parameterisation of the squeeze forces and time lag between the different pressure circuits. The moulding machine can be set differently depending on the pattern contour. In the case of a recessed pattern, the pistons advance rapidly from the centre; in the case of a raised pattern, those at the edge. For the majority of applications, the use of this compaction stage alone ensures an optimum mould.