SPONGE PHYSICAL PROPERTY MEASURING APPARATUS

PURPOSE:To judge the physical property of a sponge accurately during and after the foaming thereof, by automatically adjusting the space capacity of a die so as to keep the pressure of a pressurization sample constant. CONSTITUTION:A sample 13 is pressurized in a sunk part 3 with an upper die 7 while being heated with electric heaters 5 and 9 to be kept at a specified temperature. The pressure P of the pressurization sample 13 is detected with a sensor 11 and transmitted to a controller 12 and the height (h) of the upper die is adjusted with a lift 8 so that the pressure will reach a specified value. A lower die 1 is vibrated with a vibrator 2 at the frequency (f) and the amplitude theta. The controller 12 performs an arithmetic processing based on the pressure P, die height (h), frequency (f), amplitude theta and torque T to make an adjustment so that the pressure P will be kept constant in the die space capacity. Thus, changes in the physical property of a sponge can be judged exactly.