Before leaving this question the reader is referred to the numerous illustrations (see pages 155 to 185), as these give a far better idea of the completeness of the Airostyle plants than is possible in this chapter.
To facilitate handling of goods to be sprayed, a turn-table is usually found of considerable service. These turn-tables vary according to the class of work that is being dealt with. In Fig. 87 is shown one made by the Aerograph Co., Ltd., which is 20 inches in diameter by 12 inches high. It is made entirely of cast iron, excepting the cone seated bearing, which is of hardened steel, which rotates freely and is nicely finished. The weight is 98 lbs. Sometimes turn-tables are provided with projecting points to prevent the article being sprayed from moving, while in other cases the top of the table is provided with ridges for the same purpose.
In all small turn-tables a conical bearing of hardened steel, properly lubricated, is sufficient for the purpose, but in the larger work it is desirable to employ ball-bearings. Whichever method is used, it is essential that the table turns very freely so that it can be moved almost with a touch.
[Illustration: Fig. 87.--AEROGRAPH TURN-TABLE.]
[Illustration: Fig. 88.--TWO FORMS OF FUMEXER]
[Illustration: Fig. 89.--THE FUMEXER IN USE.]
[Illustration: Fig. 90.--A PAASCHE TURN-TABLE.]
Fig. 90 shows the Paasche turn-table, which can be raised or lowered into suitable positions as well as tilted at any angle. It revolves freely with a gentle touch. Larger sizes are supplied. The necessity of providing for carrying off the fumes which arise in paint spraying has already been dealt with.
This invention is the property of the DeVilbiss Manufacturing Company, and is intended to overcome the tendency of the air to cool as it leaves the nozzle in spraying, while it tends to keep it heated till it reaches the work. It also raises the temperature of the varnish or enamel, producing a smooth, even finish.
In addition to heating the air, the auto-heater warms the nozzle, thereby raising the temperature of the varnish. Because of the heated air and warmed material there is a complete elimination of the pitted, pebbled or mottled effect so noticeable when "short oil," quick setting or heavy bodied varnishes or enamels are sprayed on flat surfaces. The auto-heater enables Aeron users to improve the quality of many classes of work--in many instances it opens up an entirely new field of usefulness. The auto-heater and the air transformer set together insure clean, dry and warm air at the proper pressure, which is an important factor in the production of the best Aeron results.