Form dipping

Thermo- or vacuum-forming Dip-, slush- or roto-molding Compression or transfer molding Calendering Reactive processing methods Solid state forming Casting 3 1,2,3,4,5 ... 

The furnace (Fig. 74) consists primarily of an iron box A, having 3 or 4 tubes (e.g., B) arranged in a horizontal row, and dipping slightly from the open (left-hand) to the closed (right-hand) end. The top, which usually forms a loose lid to the rest of A, carries a thermometer T, and care should be taken to ensure that the bulb of the thermometer is not touching any part of the metal box. The Carius tube encased in... 

The mercury-sealed stirrer may be replaced by a Kyrides stirrer (Fig. II, 7, 12) formed from a P.V.C. gland and lubricated with a mixture of vaseline and light paraffin. The continuous passage of nitrogen may be dispensed with if a fairly wide tube dipping into a little mercury is connected to the top of the condenser the latter serves to retain the nitrogen atmosphere. 

A variation of the same principle is the DDS-vacuum pressure filter which has a number of small disks mounted on a shaft which rotates discontinuously. The cake is formed on both sides of the disks when they are at the bottom position, dipped into the slurry. When the disks come out of the slurry and reach the top position, hydrauhcaHy driven pistons squee2e the cake and the extra Hquid then drains from both sides of the cake. The cake is removed by blowback with compressed air. 

Fig. 3. WORM media data writing techniques and typical layer constmction (3) (a) ablative writing, DIP concept (4) (b) ablative writing, LIDA technique (5) (c) writing by bubble forming (d) writing by bubble forming, layer arrangement after (6).

Writing by Bubble Forming. Bubble formation occurs under thin metal layers on polymeric substrate films, caused by local evaporation when hit by a focused laser beam (see Fig. 3c). Bubble formation occurs as in the DIP concept in dye-in-polymer films which are covered by a thin metal (mostiy gold) or ceramic layer (6) (see Fig. 3d). 

The electrolyte is prepared by dipping granulated lead, suspended in a basket, into and out of the fluosUicic acid. The lead oxidizes during the operation and lead fluosUicate is formed ... 

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