A pressing machine comprising two rods that can be axially and respectively displaced by means of a drive unit. The front face of a helical spring that is placed on top of each rod touches the sample which is pushed onto a support and pushes said sample against the abutment. Both rods are driven backwards before the sample is touched. They press the sample against the abutment until both helical springs are relaxed and become detached from the sample without force, whereupon the drop hammer is released. The sample remains on the abutment without any play and rebounds from the impact of the drop hammer do not occur.
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