Weighted garment counterweight block, mixing device, and manufacturing process thereof

A mixing device for a counterweight block of a weighted garment, wherein the mixing device comprises a cylindrical stirring chamber disposed horizontally, two tubular material-feeding chambers concentrically connected to two ends of the cylindrical stirring chamber respectively and both communicating with an interior of the cylindrical stirring chamber, a granular material-feeding tube connected to an upper side of the cylindrical stirring chamber and communicating with the interior of the cylindrical stirring chamber, a material-discharging tube connected to a lower side of the cylindrical stirring chamber and communicating with the interior of the cylindrical stirring chamber, and a mixing mechanism disposed within the interior of the cylindrical stirring chamber and interiors of the two tubular material-feeding chambers;

• the mixing mechanism comprising two chamber covers sealingly fixed at end openings of the two tubular material-feeding chambers respectively, and a horizontal rotatable stirring shaft inserted through and connected concentrically between the two chamber covers, two ends of the stirring shaft being respectively provided with two screw portions having mutually opposite helical directions, the two screw portions being disposed within the interiors of the two tubular material-feeding chambers respectively;
• the mixing mechanism further comprising two stirring blade units provided on the stirring shaft, distributed diagonally to each other, and both located within the interior of the cylindrical stirring chamber, each of the stirring blade units comprising a plurality of stirring blades fixed on the stirring shaft and arranged sequentially along a length direction of the stirring shaft, wherein the plurality of stirring blades of one of the stirring blade units and the plurality of stirring blades of another one of the stirring blade units are distributed mutually interspaced from each other;
• the mixing device further comprising two metering valves, one connection port of the two metering valves being respectively connected to an outer wall of the two tubular material-feeding chambers, and communicating with the interiors of the two tubular material-feeding chambers respectively;
• a shape of each of the stirring blades being elliptical, and a hole being opened in each of the stirring blades;
• a plurality of material-evening rods being inserted through and fixed to each of the stirring blades, and horizontally arranged and sequentially distributed along a contour of each of the stirring blades around a periphery of the hole.