Hydrostatic pressing apparatus

A hydrostatic pressing apparatus for pressing a blank along an axis of pressing comprising:

• a container having a cavity for accommodation of a blank;
• a high pressure source;
• the cavity of said container communicating with said high pressure source;
• a die arranged outside said container on a first side thereof adjacent to one end of said cavity;
• a plug arranged within the cavity of said container on a side thereof opposite to the position of said die;
• a lock supporting said die and movable along the pressing axis;
• a lock supporting said plug and movable along the pressing axis;
• means for causing said locks of said die and plug to move relative to each other;
• a power frame formed by two slabs, the slabs being arranged on opposite sides of said container and connected to one another;
• the cavity of said container being of stepped configuration, with a portion of smaller diameter communicating through a radial channel with said high pressure source, while a portion of larger diameter is blocked by said plug for developing therein during the hydrostatic pressing a force sufficient to move said power frame with respect to said container and to press said die against said container before hydrostatic pressing begins;
• said two slabs of said power frame being arranged at a distance from one another which is slightly greater than the length of said container;
• said lock of said die being installed in such a manner that it bears against one of said slabs during the hydrostatic pressing;
• said lock of said plug being installed in such a manner that it bears against the other of said slabs during pressing.