JPS609567A - Die device for casting - Google Patents

Abstract

PURPOSE:To eliminate the need for disposing cores into dies and to improve the efficiency of casting operation by providing plural numbers of upper dies according to the number of casting, connecting the cores to the movable plate for the upper dies and making the respective upper dies horizontally movable. CONSTITUTION:A die cavity 14 is formed by plural upper dies 37, lower dies 9, horizontal dies 13 and cores 33 of the number corresponding to the number of casting by one shot. Port cores 16, 17 and jacket cores 18 are disposed thereon and a molten metal is poured into the cavity, by which casting is performed. When the dies 13 are opened upon solidification of the molten metal and the dies 37 and the cores 33 are risen, the castings rise as well. The dies 37 are then spaced horizontally from the cores 33 by the operation of a cylinder 38 and the castings are spaced from the dies 37. The castings are easily and surely parted from the dies even if the cores 33 are fixed to the plate 3 by using the above- mentioned device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a casting mold device, particularly a C
This invention relates to a suitable mold device.

An example of a conventional mold of this type for manufacturing a plurality of cast products in one shot is the one shown in FIG. 1, for example, in a low-pressure casting mold apparatus.

In the figure, 1 indicates an upper fixed plate, 2 indicates a lower fixed plate, and 3 indicates a movable play 1-. This movable plate 3 is driven up and down by a descending cylinder 4 attached to the upper fixed plate 1, and the movable plate 1-3
This vertical movement is achieved by a guide rod 5 that projects upward from the movable plate 3 and passes through the upper fixed plate 1, and a tie bar that passes through the side end of the movable plate 3 and connects the upper fixed plate 1 and the lower fixed plate 2. 6.

A single upper die 8 is connected to the movable plates 1 to 3 via a spacer 7, and this - upper die corresponds to the upper surface shape of a plurality of, in this example two, 17iN products. It has a contour.

Further, a fixed lower mold 9 is attached to the lower fixed plate 2, and this lower fixed mold 9 has a contour corresponding to the lower surface shape of the two cast products.
Note) It has a hole 110 that communicates the crucible placed below the lower fixing plate 2 with the mold door 11 bidi. Here, the pouring port 10 is connected to the feeder 11 and the sp]--
12 to the crucible.

Furthermore, in order to form the above-mentioned mold caddy, a horizontal mold 13 is provided which has a contour corresponding to the side shape of the cast product and is driven horizontally forward and backward with respect to the upper and lower molds 8.9. As shown in the illustrated example, a mold cavity 14 is formed by these horizontal molds 13 in the extended state, the upper mold 8 in the lowered state, and the fixed lower mold. Note that in this example, horizontal type 1
The forward and backward drive of No. 3 is provided by the horizontal cylinder 15.

Here, since the two castings in this example are cylinder heads of an automobile engine, two pairs of boat cores 16.
7 and the jacket 1 to the core 18 are arranged, and when each cast product is released from the upper mold 8, in order to prevent the so-called reverse taper part existing in the adjacent part from interfering with the neck 1 mold. The core 19 is placed at the position.

43 In the figure, 20 indicates a plurality of rainbow bore turbines passing through the upper die 8 in order to release the cast product from the upper die 8, and 21 indicates the upper die 8 and the movable plate 1-3. 22 indicates a connection plate that integrally connects these ejector turbines 20 with each other, and 22 is used to lower the ejector turbine 20 relative to the upper mold 8 to release the cast product from the upper mold 8. 2 shows an extrusion pin that protrudes downward from the upper fixed plate 1, and this extrusion pin 22 passes through the 100-hole 23 provided therein based on the upper limit of the movable plate 3, and connects the connecting plate 21 and the ejector turbine 20. It restrains the rise.

When a cylinder head is cast using such a mold device, a mold cavity 14 as shown in the figure is formed, and various cores 1G, 17, 18 are arranged within the mold cavity 14. , into which the molten metal in the crucible is poured through the stalk 12, feeder 11, and pouring spout 10. After the molten metal solidifies, first each horizontal mold 1
3 is opened by the horizontal cylinder 15, and then the movable plate 3 and the upper mold 8 are raised by -F by the elevating cylinder 4. At this time, the cylinder head as a cast product is lifted up into the upper mold 8 ("J" 44), so when it is raised by a predetermined amount, the ejector pin 22 and the connecting plate 23 come into contact with each other. Bringing the ejector turbine 2o
By restraining the rise of the mold, the two castings 24 are released from the upper mold 8 as shown in FIG.

However, in such conventional technology, in order to prevent the inverted tapered portions existing in adjacent parts of the plurality of VJ products cast by one-shot casting from interfering with mold release, a core is placed in the inverted tapered portion. 19, and then removed after the mold is released, which requires man-hours to manufacture, install, and recover the cores, resulting in poor work efficiency and high product costs. There was a problem.

The present invention provides a mold device for casting 3a which advantageously solves the problems of the prior art.
In particular, the molding device has a plurality of upper dies depending on the number of pieces interfering with the one shot 1, and between these upper dies, the cores corresponding to the placing cores of the prior art are placed in the movable play 1~. The upper molds are connected to each other, and each upper mold can be horizontally moved in the direction of a circle from its core.

In the casting mold device of the present invention, the core is connected to the movable plate and constitutes a part of the mold.
] There is no need for the production and installation of the Ii'i J3. Furthermore, since the multiple upper molds are moved horizontally in the direction away from the core, the cores do not interfere with the release of the cast product, and the man-hours required to recover the cores from the cast product are also eliminated. .

This invention will be explained below based on the drawings.

FIG. 3 shows an embodiment of this light, and is a partial i-plane view, in which the same parts as in FIGS. 1 and 2 are designated by the same numbers.

Here, the upper play 1-31 is fixed to the movable plate 3, and the core 33 is provided at the lower end of the rod 32 that projects downward from the center of the upper plate 31. and the movable play 1-3 are indirectly connected.

In addition, two slide plates 34 are arranged on both sides of the core 33 and thus the rod 32, and these slide plates 34 are connected to the side ends of the upper plate 31, as is clear from the cross-sectional view (not shown in FIG. 4). It is supported horizontally by a single-shaped support part 4Δ35 fixed to the part. Upper molds 37 are respectively fixed to these slide plays 1 to 34 via spacers 3G, and these upper molds 37 are connected to cylinders 3811 connected to the spacers 36.
:Horizontal drive, here in particular, enables drive in the direction away from the core 33.

A plurality of eject turbines 39 passing through each upper mold 37 in the vertical direction are disposed so as to be relatively displaceable with respect to the upper mold 37. It is integrally connected to the mold 37 by a connecting plate 40.

41 in the J5 figure indicates a through hole provided in the upper play 1-31 in continuity with the through hole 23 of the movable plate 3.
2 indicates through holes provided in the slide plate 34 and aligned with the through holes 23, 41 when the upper mold 37 is spaced from the core 33;
42 allows the extrusion pin 22 to enter therein when the cast product 24 is released from the upper die 37.

According to such a casting mold device, two upper molds 37,
A mold cavity 14 is formed by the lower mold 9, the horizontal mold 13, and the core 33, and two pairs of boat cores 1f3. Casting is performed by pouring the melt in the crucible in the same manner as described above.

After the melt in the mold upper tee 14 solidifies,
First, the horizontal mold 13 is opened, and then the rain mold 37 and the core 33 are raised based on the operation of the lifting cylinder 4. As a result, the cast product 24 also rises together with the upper mold 37, so in order to release the cast product 24 from the upper mold 37, the two upper molds 37 are sequentially moved as shown in FIG. ,
Or at the same time, by sliding the slide play 1-34 relative to the support member 35 based on the operation of the cylinder 38,
horizontally separated from the core 33, and after this separation,
The extrusion pin 22 is brought into contact with the connecting plate 40, and as shown in FIG.

Therefore, here, the core 33 is fixed to the movable plate 3,
Therefore, although it constitutes a part of the mold, the cast product 2
4 can be easily and reliably released from the mold, so compared to the case where an independent core is placed inside the mold cavity 14, the man-hours for manufacturing, installing and recovering the core are completely unnecessary. The benefits of becoming. Although the present invention has been described above based on the illustrated example, for example, if the upper play 1 provided with the core 33 is made horizontally movable with respect to the movable plate 3, three or more cast products 24 It is also possible to manufacture it in one shot, and the advancing and retracting drive means, here the cylinder 4, 15, 38, can also be made into a gear reciprocating drive means.

According to this invention, in particular, there are a plurality of upper molds corresponding to one-shot spinning suspension, the core is connected to the movable play 1 to between these upper molds, and each upper mold is connected to the core. By making it horizontally movable in the direction away from the die, it becomes unnecessary to arrange the core inside the mold cavity, thereby improving casting work efficiency and reducing product cost.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a conventional example, Fig. 2 is a cross-sectional view showing the release state of a cast product put into the apparatus shown in Fig. 1, and Fig. 3 is a cross-sectional view showing an embodiment of the present invention. A partial cross-sectional view of the support, FIG. 4 is a cross-sectional view taken along line IV--IV in FIG. 3, and FIG. 5.6 is shown in FIG. 3.4, respectively. It is a cross-sectional view showing the mold release process in which the mold is pulled into the device. 3... Movable play 1-4... Lifting cylinder 9...
・Lower mold 10...Pouring port 13...Horizontal mold 14...Mold cavities 16, 17
... Bo 1 - Nakako 18 ... Jakela 1 - Nakako 24
... Casting product 31 ... Upper plate 32 ... Rod 33 ... Core 34 ... Slide play 1 to 35 ... Support member 37
...Upper mold 38...Cylinder.

Claims (1)

[Claims] 1. An upper mold (31) connected to a movable plate (3) and driven up and down, and a fixed lower mold (9) having a spout (10).
and a horizontal mold (13) that is horizontally advanced and retracted with respect to these upper and lower molds (37, 9), the upper mold (37) is moved in accordance with the casting quantity of one shot. A core (33) is connected to the movable plate (3) between these upper molds, and each upper mold (31) is horizontally movable in a direction away from the core (33). A casting mold device characterized by: