Method and apparatus for rotational molding with evacuated guard chamber in mold flanges

摘要: The apparatus comprises a double walled mould interior divided into two halves, heat exchange exterior hollow envelope and pressure-exchange compartment within the surrounding adjacent abutting surfaces of rims heat-exchanges pressure-exchanges producing means to rotate on axes, introduce protective gas avoid combustion vapors optional cooperating between heat-exchange in heating cooling phases. method includes controls pressure steps during stages formation bubbles, deformities combustions, particularly when transparent plastic materials difficult are used.