why need separate sand plant for high pressure molding

ARCHIVES of FOUNDRY ENGINEERING - ResearchGate 30 ARCHIVES of FOUNDRY ENGINEERING Volume 13, Issue 3 /2013, ... molding sand goes as high as above ten ... pressure during the first stage of the casting ... The Haber Process for the manufacture of … A description of the Haber Process and an ... The pressure varies from one manufacturing plant to another, but is always high. ... you need as high a pressure … Sand Casting Process, Defects, Design - … Sand casting is a type of expendable mold ... by propelling it under high pressure. ... molding packs the sand by removing the air between the ...    Read More