| 摘要 |
An apparatus for centrifugal casting in split molds has a rotatable casting head which is in the form of a hollow frustum of a cone. The head is provided with circumferentially spaced slots which extend along the generatrices of the cone. Each of the slots slidably receives a section of a mold, the various sections being so designed as to define a mold with one another when the sections are properly positioned relative to one another. Each of the mold sections is connected with, but is rotatable relative to, a hollow, primary piston which draws the mold sections together and moves them apart. A jaw chuck having a pair of jaws pivotally mounted thereon is arranged for rotation with the mold sections. The jaws are activated by a rod connected with a secondary piston which reciprocates inside the hollow, primary piston and may be moved independently thereof or in unison therewith. The rod is rotatable relative to the secondary piston. In operation, the primary and secondary pistons are displaced in a sense causing the mold sections to come together and causing the jaws to be moved away from the mold sections. The mold defined by the mold sections is filled with molten metal and the casting head is set into rotation. When the casting made in the mold has solidified, the primary and secondary pistons are activated causing the mold sections to move apart and causing the jaws to open and move towards the casting. When the jaws embrace the casting, the secondary piston closes the jaws and the primary and secondary pistons are thereafter displaced in a sense causing the casting to be withdrawn from the casting head and causing the mold sections to move back together.
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