Calculate the size of the press required to mold a part using a multicavity transfer mold in which the part size is 2.5 inches by 2 inches. The mold contains four cavities. There are four runners, each of which has a diameter of 0.375 inches and a length of 1.5 inches. The sprue has a projected area of 0.25 square inches. Assume that a transfer pressure 8,000 psi is needed
What will be an ideal response?
2.5 X 2 X 4 = 20 in^2 for the total projected surface area of the parts. 4 X .375 X
1.5 = 2.25 in^2 for the projected surface area of the runners. 20 + 2.25 + .25 =
22.5 in^2 for the total projected surface area. 8,000 psi X 22.5 in^2 = 180,000 pounds of pressure. 180,000 pounds / 2000 pounds = 90 tons of pressure.
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