| 摘要 |
<p>A method for decorating an etching pattern on a pipe and an etching bath therefore is provide which improves the etching rate of the oxidizer, thereby decorating a pattern on the pipe more accurately by spraying an oxidizer onto a surface of a pipe such that a pattern of the pipe is etched, and alien substances generated during etching are separated from the pipe by the spraying force of the oxidizer at the same time. An etching bath(3) for decorating an etching pattern on a pipe(1) comprises: a body(31) in which a predetermined internal space is formed, which has a plurality of rotary gears(41) installed at both sides thereof such that the rotary gears are connected to a speed changing motor(43) by a belt(42), and rotary shafts(45) axially installed in the center thereof such that the rotary shafts can be attached to or detached from the body; oxidizer storage parts(33) which are formed on the bottom inside the body, and in which a heating wire(61) of a heater controller(6) is embedded; and rotary spray pipes(52) having a predetermined length, which are installed in the body on the center lines of the oxidizer storage parts, of which tops are connected to spray motors(51), which have an inflow vane integrally formed on an inner side of the bottom thereof, and a plurality of spray holes(53) formed in its outer peripheral surfaces.</p> |
