ОПОКА ДЛЯ ИЗГОТОВЛЕНИЯ ЛИТЕЙНЫХ ВАКУУМНО-ПЛЕНОЧНЫХ ФОРМ

摘要

FIELD: technological processes. ^ SUBSTANCE: moulding box contains casing with internal cavities along the whole perimeter, internal walls with windows and filtering elements, journals with openings for connection with vacuumising system. Internal walls create working cavity. Parts of internal walls are made as inclined from the point that stays in the range of moulding box height middle 10%. Parts of internal walls are inclined to the center of plane at the angle of 15-25. ^ EFFECT: reduction of underpressure value in vacuum-film mould with provision of its required strength and better quality of foundry. ^ 2 cl, 2 dwg