JPH0214830Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a casting core manufacturing apparatus for manufacturing a core for casting hollow castings in castings of aluminum, cast iron, etc.

(Prior art and its problems) An example of a casting core manufacturing apparatus will be explained based on FIG. A mold support frame 4 is fixed to each surface facing the moving block 3, and each mold support frame 4 is
A core mold 6 is placed on each opposing surface of the core mold 6 via a mold mounting plate 5.
is fixed, and a burner plate 8 is provided in each mold support frame 4, as shown in FIG. It has the following configuration.

When producing a core, the burner nozzle (referred to as a burner chip in the industry) fixed to the gas supply port 7 of the burner plate 8 is ignited to heat the core mold 6, and then the cylinder The moving block 3 is moved by the device 9 to join the two core molds 6 as shown in the imaginary line in the figure, and then sand is filled into both the core molds 6 and the two core molds 6 are bonded together. The sand in the mold 6 is fired into a predetermined core shape.

By the way, since the core mold 6 has a thick part 6a and a thin part 6b corresponding to the desired core shape, it is difficult to heat the entire core mold 6 evenly.
The thin wall portion 6b is at a higher temperature than the thick wall portion 6a, and the sand in contact with the thin wall portion 6b is excessively burnt.

Therefore, conventionally, the burner nozzle 10 shown in FIG. 6 is attached by screwing into the gas supply port 7 facing the thick part 6a, and the burner nozzle 10 shown in FIG. It is attached by screwing together a blind plug 11 made of a bolt, so that both the thick part 6a and the thin part 6b are heated evenly.

However, in this conventional configuration, since the core mold 6 is replaced relatively frequently, an arm is inserted between the two narrow mold support frames 4 to remove the burner nozzle 10 and blind plug 11 which are in a high temperature state. Moreover, since the attachment/detachment is done by screw fitting, it takes a lot of time and effort, resulting in long loss time and a decrease in manufacturing efficiency.

(Purpose of the invention) In view of the above-mentioned conventional problems, the present invention is capable of quickly and easily arranging a burner nozzle at a predetermined position, and also automatically closing gas supply ports where no burner nozzle is arranged. It is an object of the present invention to provide a casting core manufacturing apparatus that can perform the following steps.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention provides a pair of mold support frames 4 that can be relatively moved toward and away from each other.
A core mold 6 is fixed to each opposing surface of the core mold 6, and a burner plate 8 is equipped with a large number of gas supply ports 7 arranged in a dotted manner on the back side of each core mold 6. In the casting core manufacturing equipment made by
Each gas supply port 7 is provided with an ignition coupler 13, and each coupler 13 is connected to each gas supply port 7.
A socket 17 having a gas passage 14 fixed to the socket and normally closed by a closing valve 16, and a socket 17 which is detachable from the socket 17 and which opens the closing valve 16 when attached to the socket. A plug 20 having a burner nozzle 10 communicating with the gas passage 14 is adopted.

(Example) An example of the present invention will be described based on FIGS. 1 to 3. That is, as shown in FIG. 1, an ignition coupler 13 is provided at each gas supply port 7 of the burner plate 8 disposed within the mold support frame 6.
Each coupler 13 is fixed by screwing to each gas supply port 7 as shown in FIG. A socket 17 provided with a shutoff valve 16 that is normally closed; and a socket 17 that can be attached to and detached from the socket 17 via an attachment/detachment device 18, and when attached to the socket 17,
A burner nozzle 1 in which the gas passage 14 is provided at the tip by opening the closing valve 16 against the spring 15.
9, and a plug 20 that communicates with the plug 9. The attachment/detachment device 18 is disposed in a plurality of tapered holes (four in this embodiment) formed in the socket 17 at predetermined intervals in the circumferential direction, and is inserted into an annular engagement groove 21 formed in the outer peripheral surface of the plug 20. The engagement ball 22 is slidably fitted into the socket 17 and is biased by a spring 23.
2, the annular slider 24 pushes each engaging ball 22 into the socket 17 when moved upward. The configuration other than the above is almost the same as the casting core manufacturing apparatus shown in FIG. 4, so the explanation will be omitted.

In the above configuration, when manufacturing the core,
Socket 1 in each gas supply port 7 of burner plate 8
7 is fixed in advance, and a plug 20 is attached to the socket 17 facing the thick part 6a of the core mold 6 which is to be attached to the mold support frame 4. The installation procedure is as simple as grasping the slider 24 and pushing it against the spring 23, fitting the plug 20 into the socket 17, and releasing the slider 24. As a result, the slider 24 is returned to its original position by the spring 23, as shown in FIG.
1 and the plug 20 is installed in the socket 17 as shown in FIG. 3a. In this state, the plug 20 pushes the closing valve 16 against the spring 15, and the gas passage communicates with the burner nozzle 19.

On the other hand, in the socket 17 facing the thin wall portion 6b of the core mold 6, the spring 15 causes the closing valve 16 to close to the second position.
It is pressed against a seal packing 25 in the gas passage 14 shown in the figure to close the gas passage 14.

After arranging the burner nozzle 19 facing the thick-walled part 6a of the core mold 6 as described above, the gas tank is opened and gas is supplied into the burner plate 8 through the gas pipe 26, and the gas is supplied to the burner plate 8. The gas passes through the gas path 27 in the plate 8 and is injected from the burner nozzle 19 of each plug 20. Next, each burner nozzle 19 is ignited, and the core can then be manufactured in the same manner as described above.

Next, when replacing the core and changing the position of the burner nozzle 19 accordingly, use the slider 24.
All you have to do is push it in against the spring 23. As a result, the engagement ball 22 and the engagement groove 21 are disengaged, and
The spring 15 pushes the plug 20 out of the socket 17, as shown in FIG. 3b.
can be separated from the socket 17. Next, the plug 20 may be attached to the socket 17 facing the thick walled portion 6a of the core mold 6 in the same manner as described above.

(Effects of the invention) According to the casting core manufacturing apparatus of the invention, each gas supply port of the burner plate is provided with an ignition coupler consisting of a socket and a plug with a burner nozzle. By attaching and detaching the burner nozzle, the burner nozzle can be quickly and easily placed in a predetermined position, and the gas supply port where the burner nozzle is not placed can be automatically closed by the socket, making it easier to install the burner nozzle. Loss time due to position changes can be significantly reduced compared to the conventional method, and manufacturing efficiency can be improved.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, and FIG. 1 is a horizontal sectional view of the main parts of a casting core manufacturing apparatus;
Figure 2 is a longitudinal sectional view of the coupler used in the device, Figure 3a is a perspective view of the coupler with the plug connected to the socket, and Figure 3b is a perspective view of the coupler with the plug removed from the socket. It is a diagram. FIG. 4 is a partially cutaway schematic plan view of a casting core manufacturing apparatus, FIG. 5 is a partially cutaway front view of a burner plate, FIGS. 6 and 7 show a conventional example, and FIG.
The figure is a perspective view of the burner nozzle, and FIG. 7 is a perspective view of the blind stopper. 4... Mold support frame, 6... Core mold, 7... Gas supply port, 8... Burner plate, 13... Coupler, 14... Gas passage, 16... Closing valve, 17
...Socket, 19...Burner nozzle, 20...
plug.

Claims (1)

[Scope of utility model registration request] A core mold is fixed to each opposing surface of a pair of mold support frames that can be moved relatively close to each other, and a large number of gas supply ports are dotted on the back side of each core mold, corresponding to each core mold. In a casting core manufacturing apparatus equipped with burner plates arranged in a shape, each gas supply port is provided with an ignition coupler, and each coupler is fixed to each gas supply port and is normally closed. a socket having a gas passage closed by a valve, the socket being detachable from the socket;
and a plug having a burner nozzle that opens the closing valve and communicates with the gas passage when attached to the socket.