United Aircraft of Canada Limited

John B Witchell

A pattern representing the airfoil section of a stator vane is located on a supporting block adapted to be received in a casting fixture. A locating block is also provided in the casting fixture in spaced relation to the airfoil pattern on the supporting block. The angle of the airfoil pattern is adjusted within the casting fixture chamber relative to the locating block. A fixed mold is adapted to mate with the mold formed in the adjustable cast fixture and the two molds are placed on a lathe by means of the locating block set in one of the molds so that the surfaces for receiving the inner and outer shroud mold cavities can be formed. The molds are then matched with the inner and outer shroud cavities, and the wax or plastic pattern material is injected into the so-formed mold cavity for forming the investment pattern. When it is necessary to produce a new vane casting with modified stagger angle, it is necessary to re-orient the half airfoil pattern in the casting fixture relative to the locating block.

Growing community of inventors

Pierrefonds, Canada

John B Witchell