Hydrostatic pressing

The mix is formed by extrusion, moulding or hydrostatic pressing into a green artifact. 

Process RO PQ LTMED Dual-Purpose LTMED Geo- Solar thermal RO Hydrostatic Press. (Dead Sea)... 

When an expl is pressed in a die by means of a ram, the friction of the walls tends to cause press and density gradients. In addition, the one-dimensional compression can result in an anisotropic structure and produce pellets with residual strains. Where dimensional stability, uniformity and high density are essential to performance, hydrostatic pressing and isostatic pressing have been used. In both of these processes, the expl is compressed by the action of a fluid, from which it is separated by a rubber (or other elastomer) film... 

In hydrostatic pressing, the expl is placed on a solid surface and covered with a rubber diaphragm (Fig 7). Although this process elimi-... 

In addition to the production of high quality charges, hydrostatic pressing and isostatic pressing can be used to consolidate expis which are so sensitive that frictional contact with the walls of a conventional mold creates a hazard. Materials like pure RDX, of which it is difficult to make firm pellets except in small sizes, can often be pressed hydrostatically or isostatically (Ref 9)... 

Hydrostatic pressing and isostatic pressing are usually applied to expis that have been evacuated, frequently at elevated temps. Temps up to 130° and pressures up to 30000 psi have been used. The surfaces where pressure is applied thru elastic membranes are, of course, of relatively poorly defined form and dimensions. Hence, these pressing processes must almost invariably be followed by machining... 

Figure 3.2 Hydrostatic pressing technique. Based on Reference [3].

When dimensional stability, uniformity and high density are essential to the performance of the fabricated explosive composition, hydrostatic and isostatic pressing can be employed. In both cases the explosive composition is compressed by the action of a fluid instead of a piston. In hydrostatic pressing the explosive composition is placed on a solid surface and covered with a rubber diaphragm as shown in Figure 7.6. In isostatic pressing the composition is placed in a rubber bag which is then immersed into a pressurizable fluid as shown in Figure 7.7. 

This expl is detonatable under hydrostatic press is incapable of igniting flammable gases]... 

Keywords metallic hydrogen, intensifier, hydrostatic press, specific pressure, Mbar... 

High pressure in a Quintus Food Press 35L-600 Hydrostatic Press at 32°C for 10 min gel-HP... 

High pressure and temperature in the same Hydrostatic Press at 83°C for 10 min gel-HP-T... 

Car trldge -head Teat er. A hydrostatic press invented by Col. Treadwell, U. S. Army, for resting strengtn of cartridge heads ... 

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