Fine finishing

Although a process of purification is not always applied to these crude oils, it is important and sometimes highly profitable to subject the crude product to a process of rectification. By rectification is meant a redistillation of the oil with steam, this procedure affecting a moderate separation of the undesirable substances which may have been formed. The substances which detract from the odor of the oil are usually left behind in the apparatus as a heavy, malodorous liquid slightly resinous in character. Rectification usually results in a fine, finished product, free from foreign odors, and leaves an oil much more presentable in color as well as in odor and taste. 

Another use of terpenes may be found in coatings such as varnish. Varnish for musical instruments like violins can be made largely from the terpene pinene. The key to generating a coating such as varnish is to allow polymerization to occur. The fact that terpenes are built up from isoprene building blocks, much like any other polymer, suggests that polymerization is a possibility. When pinene (present in pine tree and made into turpentine) is exposed to air and sunlight, it will slowly polymerize and make a fine finish for wood. 

BMC is commercially available in different combinations of resins, predominandy TS polyesters, additives, and reinforcements. They meet a wide variety of end-use requirements in high-volume applications where fine finish, good dimensional stability, part complexity, and good overall mechanical properties are important. The most popular method of molding BMCs is compression. They can also be injection molded in much the same way as other RTS compounds using ram, ram-screw, and, certainly BMC mixes, conventional reciprocating screw plasticators. 

The structure factors of InP were obtained from the x-ray diffraction spectra of powder samples, 20 mm in diameter and 2—3 mm thick. These samples consisted of finely ground and elutriated powders whose grain size was below 1 /it. These powders were compacted at pressures up to 6000 kgf/cm. Some of the samples were not compacted in these cases a binder was used. The samples containing a binder were ground and polished. The sur ces of the compacted samples had a sufficiently fine finish because we used a plunger with a mirror-smooth surface. 

The majority of diamond and cBN abrasive is used in so-called bonded tools , although much polishing and fine finishing is carried out using the abrasive as a loose powder or in a slurry when mixed with an oil or other carrier medium. Diamond and cBN abrasives are normally used in particle sizes of approximately 1 mm down to less than 0.1 pm, and their sizing is subject to international standards, the most widely used being the FEPA standard [229]. 

Rouge composition A material composed of rouge mixed with a suitable binder and molded in cake form. It is used for buffing gold, silver, platinum and also for fine finishing on glass, brass, nickel steel, etc. This material was one of the first buffing compounds to be used (Jacobs 1928)... 

Fine finishing of holes or reaming process belongs to the high-precision machining... 

Fine Finishing of Hoies, Tabie 1 Cutting parameters -recommended feed rates are between 0.1 and 0.25 mm per tooth... 

Fine Finishing of Hoies, Fig. 2 Multi-flute reamers... 

Fine Finishing of Holes, Fig. 4 Single-blade reamer with guiding pads... 

Polishing Versus Other Fine Finishing Processes... 

A superfinishing abrasive stone is generally vitrified bonded and has a hardness range of HRH20-70. White aluminum oxide, silicon carbide, cubic boron nitride, or diamond abrasive is used. Abrasive sizes in the JIS 300- 500 range are used for coarse finishing, while JIS 600- 1500 abrasives are used for a fine finish (Matsui and Nakasato 1965, Onchi et al. 1995, Varghese et al. 1998). 

The wear characteristics of the stone are also affected by finishing pressure. If the finishing pressure exceeds a critical pressure, stone wear is drastically accelerated as the stone fractures or abrasive is released. Although this increases the material removal rate, it hardly achieves a fine finish. Accordingly, it is important to maintain the superfinishing pressure below the critical pressure. 

Fine Finishing of Holes 504 Five-Axis Tool Path Generation 514 Gear Cutting 569... 

The top heating system enables a fine finish on the surface of the ingots. 

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