Powdery-material mixing degree measurement device and compression molding system

A compression-molding system comprising:

• a powdery-material mixing degree measurement device, configured to measure a mixing degree of mixed-powdery materials containing at least two types of powdery materials and subsequently deliver the mixed-powdery materials toward a compression-molding machine configured to compression mold the mixed-powdery materials, the powdery-material mixing degree measurement device comprising:
• a supplier configured to be fed with the mixed-powdery materials;
• a discharger configured to discharge to feed, with the mixed-powdery materials, a filling device configured to fill a die bore of the compression-molding machine with a powdery material;
• a rotator including a plurality of movable portions and configured to capture the mixed-powdery materials fed through the supplier and to transfer the mixed-powdery materials to the discharger;
• an auxiliary rotator attached to an agitation shaft with the rotator agitating the powdery material and mixing with the rotator;
• a first sensor configured to measure the mixing degree of the mixed-powdery materials, that are flowing, captured by the movable portions of the rotator and the auxiliary rotator;
• a second sensor configured to detect whether or not the mixed-powdery materials in the supplier have an upper surface level kept within a constant target range;
• a third sensor configured to measure the powdery materials captured by the rotator and the movable portions not in motion as well as the powdery materials in the movable portions, and
• a controller configured to control the first sensor, the second sensor, and the third sensor, and to adjust a rotational speed of the rotator such that the upper surface level of the mixed-powdery materials in the supplier is kept within the constant target range;
• and
• a compression-molding machine combined with the powdery-material mixing degree measurement device,
• wherein the compression-molding machine includes a rotary compression-molding machine and is configured to rotate a turret including a table including the die bore, and punch retaining portions vertically slidably retaining punches disposed above and below the die bore, along with the punches, and fill the die bore with the powdery material from the filling device disposed just above the table, to compress the powdery material filled in the die bore with the punches and to obtain a molded product, and
• wherein the compression-molding system further comprises another controller configured to adjust a rotational speed of the turret and the punches by increasing or decreasing the rotational speed at certain rates over different periods of time according to an upper limit and a lower limit of a constant target range to cause the powdery material in a feeding pipe directly connected to the filling device and configured to be fed with the powdery material discharged from the discharger of the powdery-material mixing degree measurement device or in the filling device, to have an upper surface level kept within the constant target range.