| 摘要 |
Apparatus for diecasting the barrel for a pin tumbler lock without the need for subsequent machining. The die comprises a generally barrel shaped cavity and three retractable cores. The first core extends radially inwardly into the cavity from one end to form the entry hole for the key and the second and third cores extend radially into the cavity until they meet at a line about which is formed a fin adapted to mate with a channel in the key. The third core also defines guide channels for the pin tumblers.
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