Machine for fatigue testing samples of foamed polyurethane etc has one set of horizontal plates for supporting samples and another vertically movable set of plates for compressing samples

摘要

A machine for fatigue testing samples of foamed polyurethane etc has one set of horizontal plates for supporting samples and another vertically movable set of plates for compressing samples. A dynamic fatigue-testing machine is controlled by a programmed logical controller and has clearly differentiated upper and lower parts. The upper part has two sets of horizontal metal plates. One set is fixed and supports polymer samples and the other set can move vertically to compress the samples. The lower part has two independently movable assemblies. The first assembly adjusts the height of the mobile plates relative to the fixed plates. The second assembly moves a horizontal plate on which the first assembly rests. The fixed plates may be rectangular, have holes for supporting poles and also ventilation holes that reduce their weight. The plates are fixed equidistantly by sleeves placed over the poles. The movable plates are also equidistant and reciprocated by a crank driven by a first reduction motor. A second reduction motor moves the plates relative to the fixed plates. A sensor firmly fixed to one of the fixed plates detects the position and relative displacement of the movable plates. A (non)transparent protective cover covers the upper part of the machine.A machine for fatigue testing samples of foamed polyurethane etc has one set of horizontal plates for supporting samples and another vertically movable set of plates for compressing samples. A dynamic fatigue-testing machine is controlled by a programmed logical controller and has clearly differentiated upper and lower parts. The upper part has two sets of horizontal metal plates. One set is fixed and supports polymer samples and the other set can move vertically to compress the samples. The lower part has two independently movable assemblies. The first assembly adjusts the height of the mobile plates relative to the fixed plates. The second assembly moves a horizontal plate on which the first assembly rests. The fixed plates may be rectangular, have holes for supporting poles and also ventilation holes that reduce their weight. The plates are fixed equidistantly by sleeves placed over the poles. The movable plates are also equidistant and reciprocated by a crank driven by a first reduction motor. A second reduction motor moves the plates relative to the fixed plates. A sensor firmly fixed to one of the fixed plates detects the position and relative displacement of the movable plates. A (non)transparent protective cover covers the upper part of the machine.