A weight-volume mixing color matching method, reclamation mechanism and automatic color mixer for automobile refinishing paintings are discussed. The method comprises (1) finding out an automobile information ID card printed with a color number on an automobile body to be refinished, finding out a color code of the automobile body or getting a close color card code through comparison, and finding out a weight formula of the refinishing paints to be used through a reader or a computer color-matching system; or using a spectrophotometer to detect coatings of the automobile body to be refinished at a position where a surface of the coatings is complete, and outputting a weight formula of the refinishing paints after calculation; and (2) converting the weight formula of the refinishing paints into a corresponding volume formula of the refinishing paints according to a measured specific gravity of a color masterbatch.

A mixing system for mixing a liquid includes a first impeller segment having a first mount and a first mixing blade secured to the first mount and a second impeller segment having a second mount and a first mixing blade secured to the second mount, the second impeller segment being separate and discrete from the first impeller segment. One or more drive members are secured to the first impeller segment and the second impeller segment for concurrently rotating the first impeller segment and the second impeller segment about a rotational axis. The first impeller segment and the second impeller segment are secured to the one or more drive members so that a plane extending normal to the axis of rotation intersects with the first mixing blade of the first impeller segment and the first mixing blade of the second impeller segment.

An agitator for being disposed in a container and rotated to agitate fluid in the container includes a shaft and an impeller attached thereto. The shaft, being supported relative to the container, provides an input for attachment of a rotation mechanism for causing rotation of the impeller and shaft. The impeller includes an impeller body defined by a hub portion for receiving and being mounted to the shaft, and a plurality of blades extending radially outwardly from a longitudinal axis of the hub portion. The impeller body is a single piece of unitary construction, such as where the plurality of blades are formed in a manner that the blades are integral with the hub portion at the formation of the blades.

An agitator for being disposed in a container and rotated to agitate fluid in the container includes a shaft and an impeller attached thereto. The shaft, being supported relative to the container, provides an input for attachment of a rotation mechanism for causing rotation of the impeller and shaft. The impeller includes an impeller body defined by a hub portion for receiving and being mounted to the shaft, and a plurality of blades extending radially outwardly from a longitudinal axis of the hub portion. The impeller body is a single piece of unitary construction, such as where the plurality of blades are formed in a manner that the blades are integral with the hub portion at the formation of the blades.

An apparatus generates truly random numbers. The apparatus includes a container that is at least partially filled with a fluid (e.g., water or air). The apparatus also includes objects (e.g., dice) suspended freely in the fluid. The apparatus includes agitators configured to stir the fluid, and cameras configured to capture images of the objects. When the agitators stir the fluid, the objects move freely (e.g., move with the created currents) in the fluid in the container. The apparatus also includes a random number generation circuit coupled to the cameras. The random number generation circuit is configured to generate random numbers based on the images captured by the cameras.

Disclosed is a dissolution mixer, which includes: a dissolution bath configured to accommodate a powder and a solvent for dissolving the powder; a powder input unit located at an outer side of the dissolution bath; an impeller installed to be rotatable inside the dissolution bath; and an anchor located inside the dissolution bath and having a passage of the powder inputted by the powder input unit and a powder spouting hole connected to the passage.

The sealing performance of a stirring device and the abrasion resistance of a seal are improved. A stirring device includes a stirring tank that defines a stirring chamber; a plurality of stirring blades that are disposed in the stirring chamber; a shear blade drive shaft that extends from a lower side of the stirring tank to the stirring chamber and rotationally drives at least one shear blade among the plurality of stirring blades; and a fixed ring and a rotating ring that is disposed radially outside the shear blade drive shaft and seals between the stirring tank and the shear blade drive shaft. A sealing surface of the mechanical seal structure is formed at the same height as or above a lowermost portion of the stirring chamber.

A method for mixing a fluid includes: dispensing a first volume of a fluid into a flexible container, the flexible container being at least partially disposed within the chamber of a support housing; repeatedly moving the support housing and the flexible container contained therein so as to mix the first volume of fluid within the flexible container; adding further fluid into the flexible container after moving the support housing to form a second volume of fluid; and manipulating a mixing element within the flexible container so as to mix the second volume of fluid.

A liquid polymer or chemical activation system, having a chamber; a top cover plate, a middle cover plate and a bottom cover plate; wherein such configuration creates a hollow space inside the chamber that is flanked by the top cover plate and the bottom cover plate; a hybrid pump blending reactor having a progressive cavity pump and one or more inlets for receiving first and second substances; an upper multistage mixing cup configured to receive the first and second substances from the hybrid pump blending reactor; at least one high shear mixer for mixing the first and second substances; at least one submersible actuator for actuating the high shear mixer; an intermediate blending section for receiving the mix of first and second substances from the upper multistage mixing cup; a lower multistage aging cup for further mixing of the first and second substances; and at least one outlet on the bottom cover plate for releasing the mix of first and second substances.

Attrition mills and propeller shaft assemblies therefor are described having features for enhanced installation and maintenance. Some embodiments include propellers having enhanced material processing characteristics.