Patent ID: 7849908

Claim:
A method for manufacturing hose couplings, the method comprising steps: making a plurality of types of top casting-cavity inserts and a plurality of types of bottom casting-cavity inserts, each of the inserts being structured to be interchangeable with one another, as desired, within a mold base of a casting machine; jointing and fixing one of the plurality of top casting-cavity inserts and one of the plurality of bottom casting-cavity inserts within the mold base; injecting a high-temperature molten metal from a furnace into both the casting-cavity inserts, so that the molten metal can fill up the casting-cavity inserts; and releasing the solidified metal from the casting-cavity inserts to produce the desired hose coupling, wherein the one of the plurality of top casting-cavity inserts defines a cavity having a first shape and the one of the plurality of bottom casting-cavity inserts defines a cavity having a second shape, the second shape being different than the first shape.