Articles, pressurized, hydraulic

Accumulators, pressurized, hydraulic, 2.2 Accumulators, pressurized, pneumatic, 2.2 Articles, pressurized, hydraulic, 2.2 Articles, pressurized, pneumatic, 2.2... 

ARTICLES, pressurized pneumatic or hydraulic (containing non-flammable gas)... 

High-pressure NMR experiments have been performed for more than 40 years using techniques ranging from hydrostatic methods employing hydraulic presses and titanium alloy vessels to the use of glass and sapphire tubes. In this article we will focus on sapphire tubes because they represent the only high-pressure NMR tool we are utilising. 

In compression molding, an appropriate weight of resin powder is placed in the cavity of a robust mold, where it is heated above its melting point and compressed by a hydraulically actuated piston. Pressure and heat are maintained for sufficient time that molecular relaxation relieves local internal stresses caused by the deformation of particles. To prevent warpage, pressure is maintained while the molding is cooled. Products of compression molding are typically billets or blanks from which finished articles are subsequently machined. 

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