Abstract:
An improved method and apparatus for producing an disbursing uniform liquid or melt droplets employing a core-fed rotating sprayer having multiple tiers of orifices.
Abstract:
A rotary atomizer is presented comprising a rotor (8), having a plurality of insert holders (20) along the perimeter of rotor (8); and a plurality of metal foam inserts (12) placed between insert holders (20) that act as nozzles of the rotary atomizer. Rotor (8) is characterized in an assembly wherein insert holders (20) secure the position of metal foam inserts (12). Rotor (8) can be disc shaped. A protection plate (10) is fixed to a stationary shaft (1) of the atomizer to prevent physical contact with rotor (8) without obstructing the atomizer output.
Abstract:
A splash plate assembly is retained in a rotary bell cup by a barbed skirt that interfaces with an inner surface of the bell cup. The splash plate assembly includes a splash plate or deflector that is secured to the front side of an insert. The insert has barbed extensions that may form a skirt around an outer periphery thereof. The insert is snapped into the front bell opening of a bell cup, and the barbed extensions elastically deform and snap back outwardly to interface with a shoulder formed in the bell cup inner surface.
Abstract:
The present invention pertains to an improved nozzle, particularly for use in wear-resistant rotary atomizers, to atomizer wheels containing such improved nozzles and to a method for obtaining microspherical particles with a narrower particle size distribution when using such nozzles. The atomizer wheels and nozzles have at least the same wear resistance as those described in the prior art, but have been improved to provide microspherical particles with a very narrow particle size distribution. The nozzle of the present invention comprises a flow channel in the shape of a vertical slot that may be lined with wear-resistant sintered material. The vertical slot may be uniformly rounded. It was found that when these improved nozzles are used for spray-drying suspensions, microspherical particles with a narrower particle size distribution are obtained than when using nozzles with cylindrical flow channels.
Abstract:
A nozzle removal assembly including an outlet nozzle for centrifuge rotors and cooperating hand tool. The nozzle has an improved structure for facilitating the installation within and removal from a rotor wall. The centrifuge nozzle includes a body portion having inlet and outlet ends wherein the outlet end includes a placement channel. The placement channel defines a radially inwardly facing engagement surface supported externally to the rotor wall for engagement with a hand tool. The hand tool is adapted for engaging the radially inwardly facing engagement surface of the placement channel wherein both rotational and axial forces may be applied to assist in the removal of the nozzle from the rotor wall. 5
Abstract:
The rotary atomizer disk has an upper part and a lower part connectable to the upper part using a plurality of screws. The disk comprises a number of atomizer nozzle insert receiving holes for receiving a corresponding number of nozzle inserts from outside the disk, and a number of screw receiving bores passing at least partially through each of the insert receiving holes for receiving the screws connecting the lower part to the upper part. In this way, by removing any one of the screws, a corresponding one of the nozzle inserts can be removed from the disk without disassembling it. The inserts may be symmetrical and be turned or reversed to be reused. The invention avoids the need to rebalance the disk after disassembling for nozzle replacement purposes.
Abstract:
The atomizer wheel is provided along the circumference of its external wall (3) with a number of ejection apertures, in which wear-resistant ceramic linings (7) are arranged by means of replaceable steel bushings (8). The steel bushings (8) and/or the linings (7) project somewhat into the annular chamber of the atomizer wheel and the bushings are sealed against the external wall (3) with sealing rings (11). Moreover, each bushing (8) is provided in its inner surface facing the associate lining (7) with a flat recess (13) extending on either side of the inner surface of the external wall (3). Thereby, the steel bushings (8) may be resiliently deformed without transferring excessive stresses to the linings (7).
Abstract:
An atomizer wheel for the atomization of dispersions of very highly wearing materials for example a caoline dispersion, said wheel comprising an annular bowl-shaped space defined by a hub, a cylindrical wall concentrically surrounding the hub, and a bottom part connecting said hub and said wall. The wall is provided with a number of holes lined with bushings of a highly wearproof sintered material embedded in cylindrical bushings of a material able to resist tensile stresses such as steel or plastic, said cylindrical bushings fitting loosely in the holes and abutting at their outer end an inwardly projecting edge of the holes and with their inner ends projecting a distance into the annular space.