A large thick walled part is shown here. It is a round stand that is about 24 inches in diameter and 20 inches tall.
Figure 1 shows a computer model of the outside of the part and
Figure 2 shows the inner ribs and bracing.
The mold for this part was made of aluminum for two reasons, The number of parts required was not expected to be very great and it was necessary to minimize the weight of the mold for handling.
Figure 3 shows the cavity side of the mold and
Figure 4 the core side, oriented as they would go together. This molded part was made of foamed polypropylene with a wall thickness of approximately 3/8 of an inch.
