JPH01128933U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a forging die equipped with a fixed punch as a forming die with relief holes, which is an embodiment of the present invention. FIG. 2 is a perspective view showing the main parts of the stationary punch in the forging die of FIG. 1. Figure 3 is the second
FIG. 3 is a longitudinal cross-sectional view showing a main part of the fixed punch shown in the figure. 4 to 6 are cross-sectional views of essential parts explaining the operation of the forging die shown in FIG. 1, in which FIG. 4 shows a stage in which a taper spline is forged, and FIG. 5 shows a stage in which a sealed space is formed. FIG. 6 is a diagram showing the stages in which the channel portion is formed by forging. 7 and 8 are cross-sectional views illustrating an example of a conventional mold with a relief hole, respectively. FIG. 7 is a diagram showing a case where a protrusion is formed in a molded product, and FIG. It is a figure which shows the case where a molding material becomes clogged. 10: Fixed punch (molding mold with escape hole), 16
: Molding material, 26: Outer peripheral surface, 28: Groove, 30: Recess, 32: Sealed space, 34: Relief hole, 38: Wire (core material).

Claims (1)

[Claims for Utility Model Registration] A mold that plastically deforms the molding material into a shape corresponding to the molding surface by pressing the molding material against the molding surface, comprising: A relief hole is provided at a portion where a sealed space is formed between the core material and the inner wall surface of the relief hole. 1. A mold with a relief hole, characterized in that the mold is embedded in a hole, and the fluid sealed in the sealed space is allowed to escape from the gap.