JPS6341315U - - Google Patents

Description

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a main part of an upper mold of an external cutting die according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a lower mold. FIG. 3 is a front sectional view showing the main parts of the lower mold. FIG. 4 is a perspective view showing a state in which a product is punched out from the material by the cutting die and the scrap is divided. 5 and 6 are a perspective view and a front sectional view, respectively, showing the scrap cutting process using the cutting die.
FIG. 7 is a perspective view showing the upper die of a conventional outer shape cutting die, and FIGS. 8 and 9 are a perspective view and a front sectional view, respectively, showing the process of punching out a material using the outer shape cutting die. 10: Upper mold, 12: Lower surface, 14: Product, 16:
First main cutting edge, 20: first scrap dividing cutting edge,
28: Projection, 30: Lower die, 40: Second main cutting edge, 4
6: second scrap dividing cutting blade, 48: curved part,
50: recess, 56: scrap.

Claims (1)

[Claims for Utility Model Registration] (1) A product of a predetermined shape is punched out of a material, and the annular scrap produced around the product by the punching is cut into multiple pieces by cutting out the above-mentioned parts on the inner periphery of the annular end face. A first main cutting edge having a shape corresponding to the outer peripheral shape of the product is formed, and a plurality of first scrap dividing cutting edges extending outward from the first main cutting edge are formed on the outside of the first main cutting edge. A second main cutting edge having a shape corresponding to the first main cutting edge is formed on the outer peripheral edge of the end face on the first die side, and each of the first scrap cutting cutting edges A second mold is formed with a plurality of second scrap cutting blades corresponding to the above, and works together with the first mold to punch out a product and divide the scrap; , the first main cutting edge is formed into a closed curve having no step in the direction of relative movement between the first die and the second die, and the first scrap dividing cutting edge is formed from the first main cutting edge to the first main cutting edge. One scrap dividing cutting blade is formed at a position separated from the other in the longitudinal direction, while a gap is formed in the longitudinal direction of the second scrap dividing cutting blade between the second scrap dividing cutting blade and the second main cutting blade. At the same time, a portion of the second scrap dividing cutting edge closer to the second main cutting edge is inclined in a direction away from the first mold as it approaches the second main cutting edge, and The outer shape cutting die with a cutting blade for scrap cutting, characterized in that a movement preventing means is provided for preventing movement of the second cutting blade for scrap cutting to a portion outside the inclined portion. (2) The scrap cutting blade according to claim 1, wherein the inclined portion of the second scrap cutting blade forms a curve that is smoothly curved convexly toward the first mold side. External shape cutting die. (3) The movement prevention means includes a protrusion formed on the first mold adjacent to the first scrap cutting blade, and a protrusion formed on the second mold adjacent to the second scrap cutting blade. A cutting blade for cutting scrap according to claim 1 or 2, which comprises a recessed part formed therein, and which restrains a part of the scrap while being curved by the protruding part and the recessed part. External shape cutting die.