JPH0233973Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a die-casting mold for manufacturing the inner cylinder of a key cylinder.

Conventionally, when manufacturing the inner cylinder of a key cylinder using a die-casting mold, the cavity was formed using a fixed mold and a movable mold so that the moving direction of the movable mold and the axial direction of the inner cylinder of the key cylinder were in the same direction. This was done using a die-casting mold in which a movable mold was slidably provided with two sliding cores, the protrusions of which formed the plate tumbler insertion holes were arranged to face each other.

However, since the pressing force of the slide core is relatively small on the inner cylinder of the key cylinder formed by the die-casting mold configured in this way, burrs are formed in the plate tumbler insertion hole, and it is necessary to remove the burrs. The press die was inserted into the plate tumbler insertion hole from the left and right to remove it. For this reason, deburring work is required, which has the drawbacks of poor work efficiency and high costs.

In view of the above-mentioned drawbacks of the conventional methods, the present invention can be molded so that no burrs are formed in the plate tumbler insertion hole, and it is possible to mold the inner cylinder of a key cylinder at low cost with easy post-processing work. Another object of the present invention is to obtain a die-casting mold in which the plate tumbler insertion hole forming piece can be repaired inexpensively and easily.

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

In the embodiments shown in FIGS. 1 to 3, 1 is a fixed mold, and this fixed mold 1 has a fixed mold main body 2,
A core 5 fixed by a plurality of bolts 4 housed in a recess 3 formed in the approximate center of the inner wall surface of the fixed mold body 2, and an inner cylinder of a key cylinder formed in the core 5. a cavity 6 forming a half shape, a plate tumbler insertion hole forming piece 8 forming a plate tumbler insertion hole whose position is adjustable and fixed in the insertion hole 7 formed in the core 5; It is composed of a runner 9 for guiding molten metal into the runner, and an insertion hole 11 for a slide core 10 forming a key insertion hole. The plate tumbler insertion hole forming piece 8 has a plurality of plate tumbler insertion hole forming parts 12 formed at its tip, and a plurality of plate tumbler insertion hole forming parts 12 at its rear portion for fixing the plate tumbler insertion hole forming piece 8 to the core 5 with pins 13. Pin insertion holes 14, 14a are formed.

A movable mold 15 is clamped to the fixed mold 1, and the movable mold 15 is housed in a movable mold body 16 and a recess 17 formed approximately at the center of the inner wall surface of the movable mold body 16. A core 19 fixed by a plurality of bolts 18, a cavity 20 formed in the core 19 and forming a half shape of the inner cylinder of the key cylinder, and an insertion hole 21 formed in the core 19. A plate tumbler insertion hole forming piece 22 that forms a plate tumbler insertion hole fixed in a position adjustable manner.
and an insertion hole 23 for the slide core 10. The plate tumbler insertion hole forming piece 22
A plurality of plate tumbler insertion hole forming portions 24 are provided at the tip.
is formed, and the plate tumbler insertion hole forming piece 2 is formed at the rear part.
A plurality of pin insertion holes 26, 26a are formed for fixing 2 to the core 19 with pins 25.

In the above configuration, the fixed mold 1 and the movable mold 15
are clamped and set so that the tip of the slide core 10 is located inside the cavities 6 and 20. Thereafter, the molten metal is forced into the cavities 6, 20 through the runner 9 and solidified. At this time, since the plate tumbler insertion hole forming pieces 8 and 22 are fixed to the fixed mold 1 and the movable mold 15, the pressing force is equivalent to the pressing force caused by clamping the movable mold 15 to the fixed mold 1. Since the plate tumbler insertion hole forming portions 12 and 24 at the tips of the opposing plate tumbler insertion hole forming pieces 8 and 22 abut against each other under pressure, molten metal does not enter between them and burrs are not formed. Thereafter, the slide core 10 is extracted, the movable mold 15 is opened, and the finished product is taken out.

In addition, the sliding of the slide core 10 is performed by the movable mold 15.
It may be configured to slide automatically according to the movement of the slider, or it may be slid by a moving mechanism using hydraulic pressure or the like. Further, the movable mold 15 is attached to a mold unit in the same manner as in the prior art, and set in the die-casting machine so that it can be clamped to the fixed mold 1 and opened using hydraulic pressure or the like.

Next, due to long-term use, the plate tumbler insertion hole forming parts 12, 2 of the plate tumbler insertion hole forming pieces 8, 12
4 is worn or deformed, remove the pins 13, 25 from the plate tumbler insertion hole forming parts 8, 12 from the cores 5, 19, and process the plate tumbler insertion hole forming parts 12, 24. fix. At this time, the plate tumbler insertion hole forming pieces 8, 22 are fixed to the cores 5, 19 with the pins 13, 25 using the pin insertion holes 14a, 26a on the rear side of the plate tumbler insertion hole forming pieces 8, 12. The plate tumbler insertion hole forming pieces 8, 2 are adjusted so that the dimensions between the pin insertion holes 14a, 26a and the tips of the plate tumbler insertion hole forming parts 12, 24 are a predetermined size (dimensions that prevent burrs from forming during mold clamping).
Rework 2. Attach the reworked plate tumbler insertion hole forming pieces 8, 22 to the cores 5, 19 with pins 13, 25.
By inserting it into the pin insertion holes 14a, 26 on the rear side and fixing it, it can be used in the same way as before reprocessing.

In the above embodiment, two pin insertion holes were formed at the rear of the plate tumbler insertion hole forming pieces 8 and 22, but the present invention is not limited to this.
It may be formed with three or more pin insertion holes.

In addition, as shown in FIG. 4, the pin insertion holes 14, 2
6 may be formed in the shape of a long hole, and shims 27 having different thicknesses may be interposed between the recesses 3 and 17 and the plate tumbler insertion hole forming pieces 8 and 22 to allow slight dimensional adjustment.

In addition, although the said Example demonstrated the die-casting metal mold, it is not limited to this and can be implemented similarly also to other casting metal mold|die.

As is clear from the above explanation, in the present invention, in the die-casting mold for forming the inner cylinder of the key cylinder, the plate tumbler insertion hole forming piece that forms the plate tumbler insertion hole in the fixed mold and the movable mold. Since these are fixedly installed so that their positions can be adjusted, the following effects can be achieved.

(1) Since the plate tumbler insertion hole forming piece that forms the plate tumbler insertion hole is fixed to the fixed mold and the movable mold, it is possible to take a larger pressing force than when forming the plate tumbler insertion hole using a conventional sliding core. . Therefore, burrs formed on the contact portion can be significantly reduced compared to the conventional method.

(2) Due to the above (1), the amount of burrs is significantly reduced compared to the conventional method, so that post-processing such as deburring can be performed extremely easily.

(3) Due to the above (2), manufacturing costs can be significantly reduced.

(4) If the tip of the plate tumbler insertion hole forming piece is worn or deformed, reprocess only the tip of the plate tumbler insertion hole forming piece and shift the attachment position to the core to ensure that it is securely installed. The plate tumbler insertion hole forming piece can be brought into contact with the plate tumbler insertion hole forming piece. Therefore, since it is not necessary to repair the entire mold, the repair can be done at low cost and the work can be done easily.

[Brief explanation of the drawing]

Figure 1 shows the clamping surface of the fixed mold used in this invention, Figure 2 shows the clamping surface of the movable mold used in the invention, and Figure 3 shows the clamping surface of the movable mold used in the invention. FIG. 4 is a sectional view of the present invention after the mold is clamped, and is a sectional view similar to FIG. 3 showing a different embodiment of the present invention. 1: Fixed mold, 2: Fixed mold body, 3: Recessed part,
4: bolt, 5: core, 6: cavity, 7: insertion hole, 8: plate tumbler insertion hole forming piece, 9: runner,
10: Slide core, 11: Insertion hole, 12: Plate tumbler insertion hole forming part, 13: Pin, 14, 14
a: pin insertion hole, 15: movable mold, 16: movable mold body, 17: recess, 18: bolt, 19: core, 20: cavity, 21: insertion hole, 22: plate tumbler insertion hole forming piece, 23: Insertion hole, 24: Plate tumbler insertion hole forming part, 25: Pin, 26, 26
a: Pin insertion hole, 27: Shim.

Claims (1)

[Scope of utility model registration request] A die-casting mold for manufacturing an inner cylinder of a key cylinder, characterized in that plate tumbler insertion hole forming pieces for forming a plate tumbler insertion hole are fixedly installed in a fixed mold and a movable mold so that their positions can be adjusted. Mold.