| 摘要 |
<p>A producing method for grater includes: coating etching resistant layers (2, 3) with etching openings (5, 6) on the front surface and the rear surface of a metal plate (1), the opening (6) on the rear surface being larger than the opening (5) on the front surface, etching liquid attacking the metal plate (1) via the etching opening (6) on the rear surface and corroding towards the etching opening (5) on the front surface without pressure, thereby etching the exposed area in the etching opening (5, 6), then, forming a sharp edge (7) near the front surface and a curved surface along the discharging direction. The edge of the grater produced by said method is sharp, and cutting is smooth.</p> |
