| 摘要 |
PURPOSE: A slit forming method for anchor bolt is provided to secure economical efficiency and improve operation efficiency and productivity by integrally forming a cutting blade capable of forming slits on mold so that slits are simultaneously formed on an anchor member by the cutting blade formed mold. CONSTITUTION: In an anchor bolt comprising an anchor member on which a plurality of slits are formed, the slit forming method for the anchor bolt comprises a step of forcibly pressing a matrix into a die hole(11) of mold die(1) by a pressing member(3), thereby forming first cutting grooves having a depth corresponding to about half thickness of the matrix on the outer surface of the matrix by the outer cutting blade parts, wherein the mold die has a diameter corresponding to outer diameter of the matrix(100) of the anchor member formed in a pipe shape, and a plurality of outer cutting blade parts(12) are formed along an upper inner circumferential part of the mold die; and a step of forcibly pressing a lower die(2) on the outer surface of which a plurality of inner cutting blade parts(22) are formed into the matrix, thereby forming second cutting grooves having a depth corresponding to the rest half thickness of the matrix on the inner surface of the matrix by the inner cutting blade parts so that the slits are formed on the matrix.
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