Abstract: It is an object to provide a finned tube type heat exchanger (spiral tube fin heat exchanger) capable of having a reduced size and having an increased heat exchange efficiency and, therefore, an increased performance. A spiral tube fin heat exchanger includes a plurality of heat transfer tubes that allow a heat exchanging object to flow therein and each including a radially-extending tube fin on an outer peripheral surface thereof, the plurality of heat transfer tubes being arranged to be oriented in an identical direction, wherein the tube fin has a spiral shape and has a spiral axis being coincident with a center axis of each of the heat transfer tubes, and the plurality of heat transfer tubes are arranged such that tip ends of tube fin portions in one of adjacent heat transfer tubes intrude between tube fin portions in the other one of adjacent heat transfer tubes.

Abstract: A horizontal-type biaxial kneader for rubber kneading and such operation. It comprises two mixing chambers provided in juxtaposed relation, which mixing chambers are connected through an interposed region below a ram and above a bridge, and rotary shafts each equipped with a rotor blade including at least two blade wings, which rotary shafts are provided in parallel to each other within the two mixing chambers, so that the content of the mixing chambers is interchanged between the mixing chambers by rotating the rotor blades in directions opposite to each other. The rotor blades have a cross-sectional configuration characterized in that a scrape angle on the rear side of the tip of each blade wing is made larger than a bite angle on the front side of the same.

Abstract: A viscous liquid processor includes a low-speed shaft and a high-speed shaft extending in parallel within a casing, and a plurality of agitator blades fixed on each of the shafts and spaced along its axial direction so that the blades on one shaft enter the spaces between the blades on the other shaft. Each of the agitator blades is generally formed in a thick disk-like configuration having a plurality of thick blade members, such a thick blade member having a parallelogrammic cross section. With this simple arrangement, delivery and shearing of highly viscous liquid can be performed to improve the agitation and stirring effects.

Abstract: Disclosed is an agitator including an agitation axis at the center of the agitator vessel, an agitator blade mounted on the agitation axis and consisting of a flat-plate-shaped blade disposed along the inner surface of the bottom wall of the agitator vessel and a grating-shaped blade continuous with the flat-plate-shaped blade, a baffle plate vertically extending for rotation around the agitator blade along the inner surface of the side wall of the agitator vessel, and drive equipment for rotating the baffle plate and the agitator blade independently from each other. When the agitator blade and the baffle plate are rotated at different speeds, circulating flow is formed in the vessel. The grating-shaped blade at the upper portion of the agitator blade shears a part of the circulating flow which descends along the radially inward agitation axis, thereby dividing that part of the flow into small parts.