Die assembly for die casting a propeller structure

Details Die assembly for die casting a propeller structure Die assembly for die casting a propeller structure

1989-05-18

1990-12-04

Hoag, Willard

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to heat or cool

164312, 164342, 249 63, 249 661, 249 79, 249122, 249142, 249162, 425554, 425577, 425436R, 425441, 425468, B29C 3934, B29C 4544, B29C 4573

Patent

active

049750410

ABSTRACT:
A die assembly for die casting a propeller structure, such as a wax propeller pattern. The pattern, which is identical in configuration to a cast metal propeller to be produced, includes a generally cylindrical hub having an outwardly flared end and a plurality of blades project outwardly from the hub. The die assembly includes a base plate and a lower core section extends upwardly from the base plate through an opening in a stripper plate, which is mounted for movement toward and away from the base plate. A plurality of die sections are mounted for generally radial sliding movement on the stripper plate from an outer open position to a closed position where they define a die cavity with the core section. The die assembly also includes an upper die unit that is mounted for vertical movement and has a cavity in its lower surface which receives the upper ends of the die sections when in the closed position. An upper core section is carried by the upper die unit and mates with the lower core section when the upper die unit is lowered into interlocking relation with the die sections. Liquid wax is introduced through an ingate to the die cavity to form the wax propeller pattern. A mechanism is provided to rotate the lower core section and the wax pattern after the die sections have been moved to the open position to move the blades of the pattern to facilitate axial removal of the pattern.

REFERENCES:
patent: 4043385 (1977-08-01), Petrenchik
patent: 4414171 (1983-11-01), Duffy et al.
patent: 4524943 (1985-06-01), Busch et al.
patent: 4706928 (1987-11-01), Hyll

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