If there is a gap between the injection molds

The gap between the injection molds is too large to cause larger curling and tearing of the edges, resulting in slightly protruding contours and thinning of the edges. Too small a gap between the injection molds will cause the strip to curl slightly and tear at a large angle, resulting in a cross section that is roughly perpendicular to the surface of the material. The ideal waste should have a reasonable crushing angle and uniform bright band. This will minimize the punching pressure and create a clean round hole with the least burrs. From this perspective, increasing the gap between the injection molds to extend the life of the mold will come at the cost of the quality of the finished hole.

The gap between the injection molds is related to the type and thickness of the stamping material. Unreasonable clearance will cause the following problems:

(1) If the gap is too large, the burrs of the parts to be punched are relatively large, and the punching quality is poor. If the gap is too small, although the punching quality is good, the die wear is relatively serious, which greatly reduces the service life of the die and is likely to cause the punch to break.

(2) If the gap is too large or too small, it is easy to produce adhesion on the punching material, which will produce strips during the punching process. If the gap is too small, a vacuum is easily formed between the bottom surface of the punch and the plate, and the scrap rebounds.

(3) Reasonable clearance can prolong the service life of the mold, has a good discharge effect, reduces burrs and flanging, keeps the printing plate clean, the orifice does not scratch the printing plate, reduces the number of sharpenings, and keeps the printing plate straight , And precise stamping positioning.