JPH054914Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for automatically placing a molded core into a precise position within a casting mold.

(Prior Art) Usually, when forming a hollow part inside a casting by casting, a core is used. This core is a sand mold, which is placed in the mold before the molten metal is poured into the casting mold, and after molding, is broken down and removed from the cast to form a hollow part in the cast.

As mentioned above, since the core is made from a sand mold, it is brittle and easily damaged, so it is necessary to carefully place it into the casting mold.

Conventionally, the work of placing the core into a casting mold has been done manually or using a core placement device.

As a conventional core storage device, for example,
- Like the one disclosed in Publication No. 125338, the core that has been molded in the molding process and transported to the casting process is clamped by a clamp arm operated by a cylinder and transferred to the casting mold and stored, or The most common method was to hold the molded core by suction and transport it to the casting mold.

(Problem to be solved by the invention) The accuracy with which the core is placed in the mold greatly affects the dimensional accuracy of the hollow part of the casting, so it must be placed in an accurate position.

However, for example, the core 2 needs to be placed in the casting mold 1 in a cantilevered state as shown in FIG.
Now, the baseboard 2a of the core 2 and the baseboard 1a of the casting mold 1.
It is necessary to precisely align the two, which is difficult to do with the above-mentioned core accommodating device. because,
This is because there are variations in the standby position of the molded core and the position of the casting mold, and in this state it is not possible to transfer the core to an accurate position.

In addition, even with conventional equipment, when transferring,
It is possible to correct the position so that the core is placed in the correct position, but this requires a separate device to recognize the exact position and a mechanism to correct the position, making the core placing device complicated. , problems such as increased size and increased equipment costs arise.

Therefore, when inserting the core 1 whose positioning is not easy as shown in FIG. 3, the process is done manually, which poses the problem of extremely poor productivity.

The present invention was developed in view of the above problems, and its purpose is to provide a core accommodating device that has a simple structure and can accurately and automatically place the core into the casting mold. It is about providing.

(Means for solving the problems) Means for solving the above problems will be explained based on FIGS. 1 and 2.

A cylinder is provided to be rotatable about an axis perpendicular to a plane including the axis thereof, and a core molding mold 8 and a casting mold 9 are arranged at a predetermined rotation angle within the rotational range of the cylinder. .

And the piston rod 4a of the cylinder 4
When connected to the core molding die 8, it forms a cavity 10 in cooperation with the mold 8, and is capable of holding the molded core 2 in the cavity 10, and When connected to the core storage position of the mold 9, the core 2 is stored and the cavity 1 is moved in cooperation with the casting mold 9 through the core.
Common structural members 20 forming 6 are connected.

(effect) The above configuration works as follows.

First, the common component 20 is connected to the core molding mold 8 to form the cavity 10, and the core 2 is molded by the cavity 10. The molded core 2 is held by the common component 20 and released from the core molding mold 8 by the operation of the cylinder 4, and then the cylinder 4 rotates and is directed toward the casting mold 9.

Subsequently, by the operation of the cylinder 4, the core 2 held by the common component member 20 is placed into the casting mold 9, and further, the core 2 held by the common component member 20 is inserted into the casting mold 9 and the common component member 2.
0 to form a cavity 16, and casting is performed.

In this way, the core 2 molded by the core molding mold 8 can be used for casting by the common component 20 that commonly constitutes a part of each of the core molding cavity 10 and the casting cavity 16. By storing the core in the mold 9, the position of the core does not shift, and it is difficult to store the core such that the baseboard of the core and the baseboard of the casting mold must match. However, it means that the core can be placed automatically with high precision.

(Embodiment) Next, an automatic core storing device according to an embodiment of the present invention will be explained based on FIG. 1 and FIG. 2.

First, the configuration will be explained using FIG. 1. A pinion 3 is rotatably provided in the device body (not shown), and the pinion 3 has a cylinder with a piston rod 4a extending in a direction perpendicular to a plane including the axis of the pinion 3. A bracket 5 to which 4 is attached is fixed. In addition, a rack 6 is meshed with the pinion 3, and the rack 6 is connected to a rotation cylinder 7 and can freely move forward (move to the left in the figure) and backward (move to the right in the figure). It's summery.

Therefore, the rack 6 moves forward and backward due to the operation of the rotation cylinder 7, and the pinion 3 follows this movement.
rotates, and the cylinder 4 is aligned with the axis (shaft) of the pinion 3.
Rotate around.

Further, a core molding mold 8 and a casting mold 9 are respectively arranged at an angle of 90° with the pinion 3 as the center.

The core molding mold 8 is a pair of molds 1 that constitute a cavity (shown in FIG. 2) 10 for molding the core 2.
1, 12, mold opening/closing cylinders 13, 14 connected to the molds 11, 12 to approach and separate them, and a blow nozzle 15 (shown in FIG. 2) for feeding sand into the cavity 10. It consists of

The casting mold 9 also includes a fixed mold 17 and a movable mold 1 that constitute a cavity 16 for molding the casting.
8, a mold opening/closing cylinder 19 connected to move the movable mold 18 toward and away from the fixed mold 17,
It consists of

And the piston rod 4a of the cylinder 4
is connected to the mold of the core molding mold 8,
A common component 20 constituting a part of the core molding cavity 10 is attached, and the common component 20 is connected to the fixed mold 17 and the movable mold 18 of the casting mold 9, It also constitutes a part of the casting cavity 16. That is, the common component 20 is a common component for forming the cavities 10 and 16 in cooperation with the core molding mold 8 and the casting mold 9, respectively.

Further, the common component 20 is provided with a protrusion 20a, so that the baseboard 2a side of the molded core 2 can be held.

The operation related to the above configuration will be explained.

After the rack 6 is advanced by the rotary actuating cylinder 7 and the cylinder 4 is facing the core molding mold 8, the piston rod 4a of the cylinder 4 is extended and the common component 20 is placed in the core molding mold. It is connected to the molds 11 and 12 of No.8. As a result, mold 1
1 and 12 and the common component 20 form a cavity 10 for molding the core 2. and,
Sand is blown from the blow nozzle 15 and fired to form the core 2 (see FIG. 2).

Subsequently, the molds 11 and 12 of the core mold 8 are opened, and the piston rod 4a of the cylinder 4 is shortened, so that the core 2 is released from the core mold 8. Then, the rack 6 is moved backward by the rotation cylinder 7, and the cylinder 4 is rotated by 90 degrees.
The core 2 is directed toward the casting mold 9.

Next, by extending the piston rod 4a of the cylinder 4, the core 2 moves forward, and the baseboard 2a of the core 2 and the baseboard 17 of the fixed mold 17 of the casting mold 9 are moved forward.
The core 2 is placed by matching a. after that,
The movable mold 18 moves and comes into contact with the fixed mold 17,
A cavity 16 that forms a casting together with the common component 20 is configured. In this way, core 2
can be paid.

Then, molten metal is injected into the cavity 16 to form a casting. After molding, the piston rod 4a of the cylinder 4 is shortened, the cylinder 4 is rotated 90 degrees again, and the common forming member 20 is set in the core molding mold 8, thus completing one process.

As described above, the molded core 2 is held in the common component 20, which is a common component of the core molding mold 8 and the casting mold 9, and is placed in the casting mold 9 in that state. , the storage position of the core 2 will not shift, and the core 2 can be stored with high accuracy.

In this embodiment, the cylinder 4 is rotated by the rack 6 and pinion 3, but the present invention
The present invention is not limited to this, and other rotation mechanisms such as a motor may be used. Also, each cylinder 4, 1
3, 14, and 19 may be operated by hydraulic pressure or pneumatic pressure.

(Effects of the invention) As explained in detail above, the present invention allows parts of the cavity for molding the core and the cavity for casting the casting to be configured in common by common constituent members, and the common configuration is as follows. The molded core is held in the member and transferred from the core molding mold to the casting mold by the rotation of the cylinder, which prevents the placed position from shifting and allows the core to be placed automatically with high precision. be able to.

Furthermore, since core molding, transport, and core placement can be performed continuously, workability and productivity can be improved.In addition, line tact is more stable than with manual work, and molding can be performed under stable casting conditions. Since casting can be performed, the quality of the castings is improved.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing a state in which a core is placed in a casting mold of an automatic placing device which is an embodiment of the present invention; FIG. 3 is a partially cross-sectional front view showing a state of the apparatus during core manufacturing; FIG. 3 is a partially cross-sectional front view showing an example of a conventional core storing state. 2... Core, 4... Cylinder, 4a... Piston rod, 8... Mold for molding core, 9... Mold for casting, 10... Cavity (for molding core), 16...
...Cavity (for casting), 20...Common component.

Claims (1)

[Scope of utility model registration request] A cylinder is provided rotatably about an axis perpendicular to a plane including the axis thereof, a core molding mold and a casting mold are arranged at a predetermined rotation angle within the rotational range of the cylinder, and On the piston rod of the cylinder,
When connected to the core molding mold, it forms a cavity in cooperation with the core molding mold, and is capable of holding the molded core in the cavity; A casting core configured by connecting common structural members that store the core in a predetermined position and cooperate with the casting mold via the core to form a cavity when connected to a core storage position. Automatic storage device.