JPS5849340B2 - Press male die manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a male die of a press.

Generally, for shearing, a male mold 1 and a female mold 2 shown in Figure 1 are used.
is used.

In the male mold 1, a punch 4 is fixed to a punch holder 3 with bolts 5, a punch plate 6 is positioned with a knock pin 7 and fixed with bolts 5, and a stripper plate 8, which is slidably fitted to the punch 4, is fixed with a spring. The punch holder 3 is connected to the punch holder 3 by a bolt 10 while being urged downward by a bolt 9.

The female mold 2 connects the die 11 and the die holder 12 to the knock bottle 13.
While positioning is performed, it is fixed with bolts 14.

Since all of these parts are machined from steel, the number of man-hours required for cutting increases considerably.

When the shape of the punch 4 is complicated, processing of the punch plate 6, stripper plate 8, die 11, and die holder 12 requires an extremely large number of man-hours.

The present invention has been made in consideration of the above-mentioned points, and in particular, provides a method for manufacturing a male die of a press that makes it extremely easy to assemble a punch plate and a stripper plate, and can omit the assembly of a punch holder and punch plate. The purpose is to

In this invention, a punch holder having a protruding protrusion that expands outward on a punch plate mounting surface and a punch corresponding to a die are molded from steel, and upper and lower openings are joined around the punch plate mounting surface. A punch plate molding frame and a stripper plate molding frame with a flat bottom opening on only one side are provided, the punch is placed on the bottom of the stripper plate molding frame, and a hardening agent is mixed in the stripper plate molding frame. After the resin is solidified, the stripper plate molding frame and the punch are separated to form a stripper plate made of resin, and the punch is placed on the mounting surface of the punch plate. At the same time, the punch plate molding frame was joined to the upper surface of the punch plate with its mounting surface facing upward, and a fluid resin containing a hardening agent was poured into the punch plate molding frame, and the resin was solidified. The present invention is characterized in that the punch plate molding frame is later removed, a punch plate made of resin is molded while being bonded to the punch holder, and the stripper plate is connected to the punch holder.

Therefore, the punch plate and the stripper plate can be molded with resin very easily, and when the punch plate is molded, the punch plate is fixed to the punch holder while being prevented from coming off by the bulging protrusion.
The assembly work for both can be omitted, thereby significantly reducing costs, and further reducing the weight and facilitating the mold installation work.

An embodiment of the present invention will be explained in order of steps with reference to FIGS. 2 to 13.

First, the punch holder 15 shown in FIG. 2 and the punch 16 shown in FIG. 3 are made of steel.

The punch holder 15 has a shank 17 formed therein, and further has mounting holes 18 and 19 and a screw hole 20 formed therein.

A bolt 22, which is a bulging protrusion that protrudes from the punch plate mounting surface 21 and expands outward, is screwed into the screw hole 20.

That is, the head 23 of the port 22 protrudes from the punch plate mounting surface 21.

Further, as shown in FIG. 4, a stripper plate molding frame 24 having a flat bottom and opening only at the top is provided.

Next, as shown in FIG. 5, a mold release agent 25 is applied to the side surface of the punch 16, and this is placed on the bottom surface of the stripper plate molding frame 24 as shown in FIG.

Next, as shown in FIG. 7, a fluid containing a fluidized resin 26 such as urethane containing 20% by weight of silica sand and a hardening agent in a ratio of 2:1 is placed on the stripper plate or mold. Pour into frame 24.

After a certain period of time has elapsed and the resin 26 has hardened, the stripper plate molding frame 24 and punch 16 are removed to form a stripper plate 27 made of resin as shown in FIG. 8.

Next, as shown in FIG. 9, a punch 2° rate forming frame 28 is formed in advance from a steel material.

This punch plate molding frame 28 is open at the top and bottom.

Next, as shown in Figure 10, bolt 2 suitable for the mounting hole 19.
9 fixes the punch 16 to the punch holder 15, the punch plate mounting surface 21 of the punch holder 15 faces upward, and the punch plate molding frame 28 is placed on the upper surface, and the punch plate molding frame 28 is placed therein as shown in FIG. Resin 30 mixed in the same manner as resin 26 is poured.

After the resin 30 has hardened, the punch plate molding frame 28 is removed, and a punch plate 31 made of resin as shown in FIG.
is prevented from coming off by the bolt 22 and the punch holder 1
5 and is molded.

Then, as shown in FIG. 13, a screw hole 32 is formed in the stripper plate 27, a mounting hole 33 is formed in the punch plate 31, and the stripper plate 27 is fitted onto the punch 16. By screwing the bolt 35 passed through the holes 18, 33 and the spring 34 into the screw hole 32, the stripper plate 27 is slidably connected while being biased downward, and the male die A is assembled.

The male die B corresponding to the male die A is the above-mentioned space} A die 36 made of steel, a reinforcing metal fitting 37, and a punch 16 (or a mold of an equivalent shape) are respectively arranged at the bottom of a molding frame similar to the IJ tube plate molding frame 24. The die holder 38 is formed by pouring the resin into it, and then removing the punch 16 and the molding frame.The six die 36, which forms the die holder 38, can be removed because the bolt 39 embedded in the die holder 38 is screwed together. Never.

Of course, the male type corresponding to male type A is male type 2 shown in Figure 1.
But it makes no difference.

In this way, the striper plate 27 and the punch plate 31 can be molded very easily by resin molding without any cutting work.

Moreover, since the punch plate 31 is fixed to the punch holder 15 while being prevented from coming off by the bolts 22 during the preforming process, the assembly work of the punch plate 31 and the punch holder 15 can be omitted, which can significantly reduce costs. .

Furthermore, since it can be made lighter, it can be easily attached to a press.

Furthermore, since the punch plate 31 and the stripper plate 27 are made of resin containing silica sand, their strength is sufficient, and the strength can be further increased by embedding reinforcing metal fittings during molding.

Note that the molding frames 24 and 28 can be easily separated by applying a mold release agent to their inner surfaces, but a punching taper may also be formed on the inner surfaces of the molding frames 24 and 28.

In this invention, since the male mold is manufactured by the method described above, the stripper plate and the punch plate can be molded very easily without cutting. By being fixed to the punch holder while being prevented from falling out, assembly of both can be omitted, which can significantly reduce costs.Furthermore, the weight can be reduced, making it extremely easy to attach to the press, etc. It is effective.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a vertical sectional side view of a conventional male die and female die, Figs. Fig. 3 is a perspective view of the punch, Fig. 4 is a longitudinal side view of the stripper plate forming frame, Fig. 5 is a perspective view of the punch coated with a release agent, and Fig. 6 is a perspective view of the stripper plate. Figure 7 is a longitudinal side view of the punch placed in the stripper plate molding frame, Figure 7 is a vertical side view of the IJ plate molded and resin poured in, Figure 8 is a perspective view of the stripper plate, Figure 9 is the punch plate. Vertical side view of the molding frame,
Figure 10 is a vertical side view of the punch fixed to the punch holder and the punch plate molding frame set, Figure 11 is a vertical side view of the punch plate molded frame filled with resin, and Figure 12 is the punch plate and punch holder. FIG. 13 is a vertical side view of the completed male and female molds. 15... Punch plate, 16... Punch, 21.
...Punch plate mounting surface, 22...Bolt (bulging protrusion), 24...S} IJ Tsupa grate forming frame, 26
... Resin, 27... Stripper plate, 28...
・Punch plate molding frame, 30...resin, 31...
punch plate.

Claims (1)

[Claims] 1. A punch plate with upper and lower openings that is joined around the punch plate mounting surface by molding a punch holder with a protruding protrusion that expands outward from the punch plate mounting surface and a punch corresponding to the die from steel, and joining the punch plate to the periphery of the punch plate mounting surface. A molding frame and a stripper plate or mold with a flat bottom opening on only one side are provided, the punch is placed on the bottom of the stripper plate molding frame, and a hardening agent is applied to the stripper plate molding frame. Pour the blended resin in a fluid state, and after the resin solidifies, separate the stripper plate molding frame and the punch to form a stripper plate made of the resin, and place the punch on the mounting surface of the punch plate. At the same time, the punch plate molding frame was joined to the upper surface of the punch plate with the mounting surface of the punch plate facing upward, and a fluid resin containing a hardening agent was poured into the punch plate molding frame, and the resin was solidified. A method for manufacturing a male press die, characterized in that the punch plate molding frame is later removed, a punch plate made of resin is bonded to the punch holder while being molded, and the stripper plate is connected to the punch holder.