Producing shaped articles from the material by using presses Presses specially adapted therefor

BPERFORMING OPERATIONS TRANSPORTING B28Stoneworking B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL

B28B3/00Producing shaped articles from the material by using presses Presses specially adapted therefor

B28B3/003Pressing by means acting upon the material via flexible mould wall parts B28B3/006Pressing by atmospheric pressure, as a result of vacuum generation or by gas or liquid pressure acting directly upon the material B28B3/02wherein a ram exerts pressure on the material in a moulding space Ram heads of special form B28B3/021Ram heads of special form B28B3/022combined with vibrating or jolting B28B3/024the pressure on the material being transmitted through flexible or resilient wall parts B28B3/025Hot pressing B28B3/027using a bottom press ram actuated upwardly towards mould covers B28B3/028Centering the press head B28B3/04with one ram per mould B28B3/06with two or more ram and mould sets B28B3/08with two or more rams per mould B28B3/083The juxtaposed rams working in the same direction B28B3/086The rams working in different directions B28B3/10each charge of material being compressed against previously formed body B28B3/12wherein one or more rollers exert pressure on the material B28B3/123on material in moulds or on moulding surfaces moving continuously underneath or between the rollers B28B3/126on material passing directly between the co-operating rollers B28B3/14with co-operating pocketed rollers B28B3/16with co-operating profiled rollers B28B3/18Roller-and-ring machines B28B3/20wherein the material is extruded B28B3/201Means for heating or cooling the barrel B28B3/205using vibrations B28B3/206Forcing the material through screens or slots B28B3/208Exchangeable wear parts B28B3/22by screw or worm B28B3/222Screw or worm constructions B28B3/224Twin screw extruders B28B3/226Means for heating or cooling the screw B28B3/228Slipform casting extruder B28B3/24by reciprocating plunger B28B3/26Extrusion dies B28B3/2609Containing rotating elements perpendicular to the axis of extrusion B28B3/2618using lubricating means B28B3/2627using means for making hollow objects with transverse walls B28B3/2636using means for co-extruding different materials B28B3/2645using means for inserting reinforcing members B28B3/2654Means for heating or cooling the die B28B3/2663Exchangeable wear parts B28B3/2672Means for adjusting the flow inside the die B28B3/2681Adjustable dies B28B3/269For multi-channeled structures