JPS5836438Y2 - die casting machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot chamber type die casting machine for metals with high melting temperatures.

The present inventor has developed a hot chamber type die casting machine for metals with a high melting temperature, as shown in Japanese Utility Model Publication No. 45-3540, in which the pouring nozzle is detached from the fixed mold after casting.

This die-casting machine is excellent as a hot-chamber type die-casting machine for high temperatures, but since the entire mold opening/closing mechanism is moved forward and backward in the direction of the molten metal nozzle, the pouring nozzle and the mold are separated during pouring. It is required that the structure is such that it is in close contact with the hot water spout and does not shift.

Although this requirement can be met by making the mechanism more robust, it will be more expensive and less convenient to use.

Therefore, this invention is an attempt to provide something that has a simple structure, can be provided at low cost, and is also easy to use since the pouring nozzle and the spout may become misaligned during operation.

That is, in this invention, the front plate of the mold opening/closing mechanism is connected to a guide bar slidably attached to a portal stand, the rollers attached to the rear plate are set to run on a forward-inclined guide rail, and A molten metal tank with a position adjustment device in which the front plate is connected to a drive device formed by a piston and cylinder mounted on a gate-shaped stand, and a pouring nozzle is placed between both legs of the gate-shaped stand to face the mold's spout. The following is an explanation of the embodiment based on the drawings.

Fig. 1 is a side view showing only the main parts of this embodiment.The main parts are a mold opening/closing mechanism A, a gate stand B, a molten metal tank C, a base D, and a bed E.The structure of these parts is as follows. That's right.

The mold opening/closing mechanism A is composed of front and rear plates 1, 2 which are connected and fixed by four diepers 3, and a slide plate 4 which slides on the diepers 3 by an opening/closing device 6 consisting of a piston and a cylinder. The two guide bars 7 on the left and right are slidably attached to the gate-shaped stand B.
Rollers 8 provided on the left and right sides of the rear plate 2 are placed on guide rails 9 provided on the bed E that tilt forward, and are configured to move back and forth in a forward tilted posture.

Furthermore, there is a split mold a on the front plate 1 and the slide plate 4,
l) and attach the product discharge device 1 to the slide plate 4.
2 is the same as before.

The gate-shaped stand B is fixed to the front part of the base D, and between the legs is a molten metal tank with height adjustment screws 13 attached to the four corners of a pedestal 17 and pressure screws 19 for a pot 18 provided in the front part. C is installed, and its pouring nozzle 11 faces the spout of the split mold a.

And in the center of the upper part is a pneumatic cylinder 1 for driving the pouring piston.
A driving device 10 is attached to both sides of the mold opening/closing mechanism A to move the mold opening/closing mechanism A forward and backward through a lever 15 and a connecting lever 16.
is provided.

The bed E is fixed to the rear part of the base D and supports the rear part of the mold opening/closing mechanism A as described above.

In the figure, 20 is a stop limit switch, and 21 is a support for an auxiliary guide 22 attached to the lower surface of the rear play 1-2.

Next, the casting operation will be explained.

In the initial state, as shown in FIG. 2a, the split molds a and l) are opened and the spout of the split mold a is away from the pouring nozzle 11.

When the operation is started, first, the opening/closing device 6 is operated, and the split mold is brought into close contact with a through the toggle mechanism 5 as shown in FIG.

Next, the drive device 10 operates to advance the entire mold opening/closing mechanism A to the left via the lever 15 and the connecting lever 16, and as shown in FIG. Then, the pneumatic cylinder 14 operates and the piston 14 a
is lowered to inject the molten metal into the cavities of the split molds a and l).

Immediately after the injection is completed, the drive device 10 is operated to return to the second position.
As shown in FIG. d, the entire mold opening/closing mechanism A is moved back to the right to separate the spout from the pouring nozzle 11.

If the hot water tap is separated from the hot water pouring nozzle 11, the water cooling device (
Since heat is not removed from the pouring nozzle 11 by the split molds a and l) cooled by the molds a and l) (not shown), the molten metal in the pouring nozzle does not solidify, which may interfere with the next pouring. Not only is there no problem, but on the other hand, split mold a
, l) are not heated through the pouring nozzle 11, so the solidification of the molten metal in the beveled ends a, l) is promoted, and in particular, since the molten metal socket is elongated, solidification progresses markedly. The molten metal will solidify and close at the same time as the separation, and the molten metal will not spill out from the hot water socket.

Next, when the solidification and molding of the molten metal in the split molds a, l) is completed, the opening/closing device 6 is operated to open the split molds a, l) as shown in Fig. 2e.
is opened and the product is pushed out by the ejection device 12.

After the product has been extruded, the above operations are repeated again, resulting in a continuous cycle of molding and casting.

As can be seen from the above explanation, the pouring nozzle separation method is an effective method for significantly improving casting efficiency as a die-casting machine for high-temperature molten metal. Since it is necessary to bring the hot water spout into close contact with the hot water spout and to separate it from the hot water spout, mechanical precision is required to ensure continuous operation.

In order to improve mechanical precision, it is easy to create a sturdy structure, but this not only makes it expensive, but also makes the structure rather complex, making it difficult to use and requiring a large amount of driving energy.

This idea provides a roller 8 at the rear of the mold opening/closing mechanism A.
The mold opening/closing mechanism A is held by an extremely simple holding method in which it runs on a forward-inclined guide rail 9 and its front part is connected to a guide bar 7 attached to a portal stand B. It has a simple structure and is easy to use.

That is, according to this structure, the mold opening/closing mechanism A can be installed and removed extremely easily, so that not only assembly but also repair and mold mounting can be performed easily.

Furthermore, since the frictional resistance of the support part is low, less driving energy is required, and a small driving device can be used.

Furthermore, since the pouring nozzle 11 and the spout fit together in a forward-leaning position, the adhesion force due to the load of the mold opening/closing mechanism A is added to the tight contact between the pouring nozzle 11 and the spout. It has the advantage of not causing time separation.

Also, since the molten metal tank C is equipped with a position fine adjustment device,
This type of device has the feature of quickly making the correct contact between the pouring nozzle 11 and the hot water socket, and relatively often moves the mold opening/opening device A and the molten metal tank C for replacement, repair, etc. It is easy to use and has a suitable structure for a practical die-casting machine.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing only the essential parts of an embodiment of this invention, and FIG. 2 is an explanatory view of the casting operation. A: Mold opening/closing mechanism, B: Gate-shaped stand, C: Molten metal tank, D: Base, E: Bed , a and b...split mold, 1...front plate, 2...rear plate, 3...diaper, 4... Slide plate, 5... Toggle mechanism, 6...
...Switching device, 7...Guide bar, 8...
...Roller, 9...Guide rail, 10...
... Drive device, 11 ... Pouring nozzle, 12
...Product discharge device, 13...Height adjustment screw, 14...Air pressure cylinder, 15...
- Lever, 16... Continuous rod, 17... Frame, 18... Pot, 19... Press screw.

Claims (1)

[Scope of utility model registration request] The front plate 1 and the rear plate 2 are connected and fixed by a tie bar 3, and a slide plate 4 is slidably attached to the tie bar 3, and the slide plate 4 is attached to the toggle mechanism 5.
The mold opening/closing mechanism A is constructed by connecting the toggle mechanism 5 to an opening/closing device 6 formed of a piston and a cylinder, and the front plate 1 of the mold opening/closing mechanism A is connected to the rear plate 2 through a gate. A roller 8 connected to the guide bar 7 slidably attached to the stand B and attached to the rear plate 2
The front plate 1 is arranged to run on a forward-inclined guide rail 9, and the front plate 1 is connected to a drive device 10 that is driven by a piston and cylinder installed on the gate-shaped stand B. A die-casting machine characterized in that a molten metal tank C with a position adjustment device for a pouring nozzle 11 is installed between the parts.