Intermeshing

Two mote piopeities for which nylon shows paiticulai advantages are abrasion resistance and coefficient of friction. These properties make the material suitable for use in, for example, unlubricated beatings and intermeshing gears nylon has been used in such apphcations from an eady stage in its development. 

Rolls may be either side-by-side with material extmded through one or both of the roUs, or one or more small roUs may be fitted inside a larger die roU. In yet another design, two intermeshed gears are used and material is extmded through die holes located in the gear root. 

Other methods also exist for handling the reaction mixture. For instance, self-wiping, twin-screw extmder using an intermeshing has been proposed (271). The advantages claimed include higher saponification temperature (less catalyst), increased water solubiUty (271), and fewer impurities (272). 

Another design which provides unusually low mating forces employs bundles of wires in both halves of the connector that intermesh, like two hair bmshes, when the parts ate connected (2). 

Holo-flite intermeshed screws for circuloting cooling Of heoting fluid... 

Equipment for viscous mixing usually has a small clearance between impeller and vessel walls, a relatively small volume, and a high power per unit volume. Intermeshing blades or stators may be present to prevent material from cyhndering on the rotating impeller. 

FIG. 18-50 Intermeshing corotating twin screw extruder (a) drive motor, (h) gearbox, (c) feed port, (d) barrel, (e) assembled rotors, (f) vent, (g) barrel valve, (h) kneading paddles, ( ) conveying screws, (/) splined shafts, (k) blister rings, (APV Chemical Machinery, Inc.)... 

The throughput rate of intermeshing twin-screw extruders (Fig. 18-56) and the Farrel continuous mixer (Fig. 18-51) is scaled up with diameter to about the 2.6 power. 

Compression is achieved by the intermeshing of the male and female rotor. Power is applied to the male rotor and as a lobe of the male rotor starts to move out of mesh with the female rotor a void is created and gas is taken in at the inlet port (see Figure 4-2). As the rotor continues to turn, the intermesh space is increased and gas continues to flow into the... 

Straight-lobe compressors, or blowers, as they are commonly called are low-pressure machines. The feature unique to these compressors is that the machines do not compress the gas internally as do most of the other rotaries. The straight-lobe compressor uses two rotors that intermesh as they rotate (see Figure 1-7). The rotors are timed by a set of gears. The lobe shape is either an involute or cyclodial form. A rotor may have either two or three lobes. As the rotors turn and pass the inlet port, a volume of gas is trapped and carried between the lobes and the outer... 

Brush An air filter constructed from a medium of intermeshing brushes. 

Figure 8 Internal mixer rotor designs (a) tangential rotor, (b) intermeshing rotor.

Figure 6-42. Helical four fluted gate blower rotors/two lobes main rotor intermeshing. See Figure 6-44. By permission, Gardner-Denver Industrial Machinery-Cooper Industries.

Figure 12-113. Typical test results of a medium-capacity spiral lobe compressor vacuum pump using intermeshing lobes. (Used by permission Ingersoll-Rand Co.)...

The typical rotary screw compressor stage is made up of two rotating shafts, or screws. One is a female rotor and the other a male rotor. These two rotating components turn counter to one another (counterrotating). The two rotating elements are designed so that as they rotate opposite to one another their respective helix forms intermesh (see Figure 3-78). As with all rotary compressors, there are no valves. The gas is sucked into the inlet post and is squeezed between the male and female... 

Rotary, positive displacement machines in which two intermeshing rotors, each in helical configuration displace and compress the air available in lubricated and non-lubricated construction the discharge air is normally free from pulsation high rotation speed. 

Figure 7.29 shows a Sulzer type SMX static mixer where the mixing element consists of a lattice of intermeshing and interconnecting bars contained in a pipe 80 mm diameter. It is recommended for viscous materials in laminar flow. The mixer shown is used in food processing, for example mixing fresh cheese with whipped cream. 

Most of the compounds were extrusion compounded in a conical, partially intermeshing, counter rotating twin screw extruder (Haake Reomix TW-lOO). The extruder speed was set at 50 rpm and the barrel temperature profile was set to produce a melt temperature of 260°C at the die. Samples were injection molded in a 31.8 MT Battenfeld press with a 59 cc shot size. Where noted, samples were compounded in a 60 cc Brabender internal mixer and compression molded. 

These two-phase polymers are generated in an optimized single-stage process using a corotating, close-intermeshing, twin-screw extruder. 

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