| 主权项 |
1. A method for producing a single-sided mold, comprising:
S1. forming a mold cavity on the single-sided mold according to shape of a product; S2. engraving a surface of the mold cavity by a first engraving and milling cutter mounted on an engraving and milling machine, wherein under control of the engraving and milling machine, the first engraving and milling cutter revolves on its own axis and then exerts a vertical force onto the surface of the mold cavity, and then exits out of an engraved hole after the engraved hole is formed; and inserting a second engraving and milling cutter mounted on the engraving and milling machine into the engraved hole for further engraving, wherein under control of the engraving and milling machine, the second engraving and milling cutter revolves on its own axis and then exerts a vertical force in the engraved hole, and then exits out of a hole to be coined after the hole to be coined is formed; and wherein the first engraving and milling cutter is shaped as a pointed cutter with flat bottom or a straight cutter, and the second engraving and milling cutter is shaped as a pointed cutter with flat bottom with a smaller width and angle of knife tip than that of the first engraving and milling cutter; and depth of the engraved hole is smaller than that of the hole to be coined; S3. repeating the step S2 until a predefined number of the holes to be coined are formed on the surface of the mold cavity; S4. placing a coining die with hardened tips on the surface of the mold cavity, and embedding each of the hardened tips into one of the holes to be coined respectively, and then pressing the mold cavity by a hydraulic press, causing each of the holes to be coined being pressed to form the coining hole, and then taking out the coining die after a coining process is finished; wherein a side wall of the hole to be coined matches shape of the hardened tip, and radius of a cusp on the end of the coining hole formed by the coining process is less than 0.02 mm. |
