Knurling

Clean the surface with a wire brush to loosen the oxide film and then wipe it off with a soft cloth. The use of a wire brush serves a dual purpose first, scraping and removing the oxide film, and secondly, providing the surface with a moderate knurling (roughness), which helps to make a better surface-to-surface contact and, in turn, a better joint. 

Kordel, /. twine, string, cord, -griff, in. milled (or knurled) knob, kordeln, kordieren, v.t. knurl,... 

Riefe,/. groove, channel striation. riefeln, riefen, v.t. channel, groove knurl, mill rifle. 

Molded-in insert If metal inserts are to be molded into a plastic product consideration should be given to wall thickness around the insert (Table 3-18) and their shape. The shape should present no sharp edges to the plastic, since the effect of the edges would be similar to that of a notch. A knurled insert... 

The results are shown in Figure 26.58 for two blunt surfaces Knurled aluminum and knurled steel. Aluminum produces a lower abrasion loss than steel. On both surfaces, however, the abrasion was much higher when MgO was used as an absorbing powder than with the mixture of Fuller s earth and alumina. The two compounds examined were an NR compound without antioxidant and one with two parts of Nonox ZA. There is a very clear difference between the two compounds indicating that oxygen plays an important role. 

FIGURE 26.58 Abrasion of two natural rubber (NR) tread compounds, one unprotected, the other with two parts Nonox ZA on a knurled Aluminum and a knurled steel surface, respectively, in the presence of (a) magnesium oxide (MgO) powder and (b) a dust mix of Fuller s earth and alumina powder. (Deduced from Schallamach, A.,Appl. Pol. Sci., 12, 281, 1968.)... 

Melvin Mooney devised an instrument to measure the stiffness of uncured compounds, also known as the compound s viscosity. The unit of measurement is expressed in Mooney units. Figure 28.1 shows an instrument set up for measuring viscosity, the Mooney viscometer, in which a knurled knob (rotor) rotates (at 2 revolutions per minute) in a closed heated cavity filled with rubber [2]. 

Tin is relatively expensive. Strength and handling can be improved by corrugations, knurling, etc. 

Leakage A burette must be tested for any sort of leakage before putting it into operation. Teflon stopcocks are usually adjusted by a knurled nut for perfect use. Glass stopcocks may require a small quantity of a special type of grease or lubricant to allow both ease of operation and to check leakage. 

The myriad types of l.c. fittings produced by a great number of vendors have led to confusion among chromatographers about the proper choice for each application. Fortunately, fittings that are more universal in their applications are now available, and one of the most useful of these has a knurled flange on the nut, and a replaceable, polymeric ferrule. These fittings may be sealed by hand and re-used many times without failure. 

The equipment feed design consisted of a funnel-shaped powder hopper (with no vacuum deaeration system) that was located directly above the rolls. The powder hopper was retrofitted with vacuum deaeration capability. A high compression feed screw, fitted inside the funnel hopper, fed the powder directly into knurled rolls. The compaction trials were conducted with and without vacuum deaeration. The compact was carefully collected directly on a 10-mesh screen. Powder particles, that were not compacted (i.e., those particles which were not attached to the compact, for example, fines bypassing roll compaction and the non-adhering compacted powder particles) were weighed and separated. The compact was not milled. The parameters are noted in Table 4. 

Regular, regular twist-off/open cap with an overall height of approximately 10 mm. Step cap with a step in the panel. Safety button raised circular portion in the centre of the cap panel that acts as a tamper evident feature (visual and audible vacuum-indicating device). Fluted cap with flutes or knurls on the skirt of the cap for better gripping. Deep deep-drawn cap having an overall height of up to approximately 15 mm. 

Fig. 8.8. Retainer stopcocks for vacuum and pressure. This style of stopcock (Koutes Inc.) is especially useful on a Schlenk manifold where both vacuum and small positive pressures of inert gas are used, (n) The retainer is being snapped onto the base of the stopcock plug, (b) The knurled nut has been tightened to hold the plug in place.

Strip Packs. Usually two laminates of paper and/or soft temper aluminum and various plastics have been used as clear cellophane (i.e., coated rather than a laminate). This process uses two rolls of either laminate or film which at the point of coming together have the product (usually tablet or capsule) placed between the rolls and heat sealed inside the rolls by means of a hot knurled roller, thereby welding the inside layers of the laminate together. The essential point of this method is that the product itself helps to form the pocket. The number of packed tablets or capsules required is then cut off the strip. 

Instant tack labels find special usage on seals, pleated overwraps, and various header labels. They are not used for bottle or can labeling. Blister and strip packs are classified as part of this category, as we require the temperature of the lacquer to be raised high enough to obtain a permanent bond with the inner surface of the base material. Pressure needs to be applied as well, and usually there will be a knurling implanted onto the mating surfaces. 

Fig. 2.16. Schematic of the coupling of the nanocolumn to the injection valve [44], 1, nano-column (75 pm I.D. x 360 pm O.D.) 2, knurled nut and ferrules 3, fused-silica make-up adapter (split device 504 pm I.D.) 4, micro-injection valve (column port 250 pm i.d.) 5, rotor 6, outlet port of the make-up adapter.

Figure 2-26 Sample spinner for 180° (or oblique) illumination. (A) Complete system with evacuated Pyrex jacket (J) surrounding the sample tube. S, cold (or warm) gas such as N2 is passed through J to control the sample temperature. Li, L2, and M are lenses, and a mirror, C, is the sample chuck. (B) Details of the sample chuck. O, split nylon cone P, knurled aluminium nut attached to aluminum body of chuck Q, spinner shaft. (Reproduced with permission from Ref. 62.)...

Ancient Fortunata herself had caught up with the conversation. Her face had crumpled into a wad of creases and she was trying to clench her knurled fists. Old she mumbled. Old Don t want to be old, old, old. ... 

Figure 30. A) Diagram of the OTTLE-IR and cell holder a) back plate, b) teflon gasket, c) salt plate/ minigrid electrode assembly (see Fig 30 B), d) knurled end cap. B) Expanded view of the salt plate/minigrid electrode assembly a) NaCl salt plates, b) Tefzel gaskets, c) gold minigrid electrode, d) indium gasket, e) teflon gasket, f) needle plate. From J. P. Bullock,...

---