JP2997420B2 - Core manufacturing equipment for casting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for manufacturing a core for forming a hollow portion of a hollow cast article made of aluminum, cast iron or the like.

As shown in FIG. 6, as an example of an apparatus for manufacturing a core for casting, a fixed block 1 and the fixed block 1
The core mold 5 is fixed to each of the opposing surfaces of the movable block 2 which can be freely attached to and detached from the movable block 2 via a mold support frame 3 and a mold mounting plate 4, respectively. As shown in FIG. 7, a burner plate 7 having a large number of nozzle mounting holes 6 formed at required intervals is provided on the front surface. The burner plate 7 is integrally formed as a whole. As shown in FIG. 7, a gas passage 7a is formed in a grid pattern inside, and a nozzle mounting hole 6 is formed at each intersection of the passage 7a. ing.

When manufacturing the cores, the nozzles attached to the respective nozzle mounting holes 6 are ignited to heat the core dies 5 and 5 and to remove the core dies 5 and 5 from each other. , Sixth
As shown by the imaginary line in the figure, the two cores 5 and 5 are joined to each other by a cylinder device 8, sand is filled in the cores 5 and 5, and the sand is fired into a predetermined core shape. .

Since the core mold 5 has a thick portion 5a and a thin portion 5b corresponding to a desired core shape, the core mold 5 may not be heated evenly. However, the thin portion 5b becomes hotter than the thick portion 5a, and the sand in contact with the thin portion 5b is excessively burned. So conventionally,
The nozzle 9 shown in FIG. 8 is screwed into the nozzle mounting hole 6 facing the thick portion 5a, and the plug 10 shown in FIG. 11 is screwed into the nozzle mounting hole 6 facing the thin portion 5b. The thick portion 5a and the thin portion 5b are evenly heated.

[0005]

However, the core mold 5 has a variety of core shapes, and the positions of the thick portion 5a and the thin portion 5b differ depending on the mold 5 used. Since the arrangement of the nozzle 9 and the plug 10 attached to the nozzle mounting hole 6 is different, each time the core die 5 changes, a large number of nozzles 9 and plugs 10 are attached and detached to form the core shape of the die 5. It is necessary to rearrange them according to the arrangement, and it takes a lot of trouble and time to attach and detach
The production efficiency was significantly reduced. As shown in FIG. 7, the gas supplied from the gas inlet 7b into the burner plate 7 is supplied to each nozzle 9 through a gas passage 7a formed in a grid pattern inside the plate 7. For,
There was also a problem that the gas flow was poor and it was difficult to uniformly supply the gas to the nozzle 9.

According to the present invention, the burner plate is divided into a plate main body and a nozzle plate, and the nozzle plate having the gas supply nozzles attached thereto in a desired arrangement is appropriately mounted on the plate main body. It is an object of the present invention to provide a casting core manufacturing apparatus capable of quickly and easily responding to core molds having various core shapes and further improving gas flow inside the burner plate. is there.

[0007]

According to a first aspect of the present invention, there is provided an apparatus for manufacturing a core for casting, wherein core molds 5, 5 are provided on respective opposing surfaces of a pair of mold support frames 3, 3 which are relatively movable. While fixing
In the core manufacturing apparatus for casting, which is provided with a hollow burner plate 11 on which a plurality of gas supply nozzles 9 are attached in a dotted manner on the back side corresponding to each core mold 5, Reference numeral 11 denotes a plate body 12 provided with a gas inlet 14 and a nozzle plate 13 detachably mounted on the plate body 12 and having gas supply nozzles 9 mounted in a desired arrangement.

According to a second aspect of the present invention, in the casting core manufacturing apparatus according to the first aspect, the plate main body 12 has a bottom wall 1.
The nozzle plate 13 is attached to the step wall portion 17 of the plate body 12, and a gas flow space portion 21 is provided between the nozzle plate 13 and the plate body 12 over the entire area. Is formed.

[0009]

FIG. 1 is an enlarged view of a part of a casting core manufacturing apparatus shown in FIG. 6, in which a burner plate 11 is detachably mounted on a plate main body 12. And a gas inlet 14 is provided in the plate body 12.
The gas supply nozzles 9 as shown in FIG. 8 are attached to the nozzle plate 13 in a desired arrangement. The burner plate 11 is disposed in a mold supporting frame 3 fixed to the fixed block 1 and the moving block 2, and a mold mounting plate 4 is detachably mounted on the mold supporting frame 3 by bolts 15. The core mold 5 is appropriately fixed to the mold mounting plate 4.

The structure of the burner plate 11 will be described in detail with reference to FIGS. 1 to 3. As shown in FIGS. 1 and 2 (A) and 2 (B), the plate And a step wall portion 17 therearound. A fitting portion 17a having an L-shaped cross section is formed on the inner periphery of the distal end portion of the step wall portion 17, and screw holes 18 are provided at a plurality of positions. The nozzle plate 13 is shown in FIGS. 1 and 3 (A),
As shown in (B), it is formed in a flat plate shape, and screw insertion holes 19 are provided at a plurality of locations on the outer peripheral edge. The nozzle plate 13 is provided with a fitting portion 17 of the step wall portion 17.
a of each screw insertion hole 19 on the plate 13 side.
Screw 2 into the corresponding screw hole 18 on the plate body 12 side
0 is screwed and fastened to the plate body 12 so as to be removably fixed, and between the nozzle plate 13 and the plate body 12 as shown in FIG. Is formed.

In the nozzle plate 13, screw holes (not shown) for nozzle attachment are formed in advance only in the portion facing the thick portion 5 a of the core mold 5 as shown in FIG. By attaching the gas supply nozzles 9, a required number of gas supply nozzles 9 can be arranged in a desired arrangement state according to the internal shape of the core mold 5 to be used, for example, as shown in FIG. Attach it with Incidentally, in FIG.
b is a thin portion of the core mold 5. FIGS. 4 and 5 show the nozzle plate 13 to which the gas supply nozzles 9 are attached in another desired arrangement state, and any of the nozzle plates 13 is fitted to the step wall portion 17 of the plate body 12. It is formed so that it can be attached. In short, each nozzle plate 13 is detachable with respect to the plate body 12, and the required number of gas supply nozzles 9 are prepared in a desired arrangement according to the internal shape of the core mold 5 to be used. It is necessary to keep.

When attaching the burner plate 11 having the above-described configuration, the mold mounting plate 4 is removed from the mold support frame 3, and the plate body 12 is moved at a predetermined position in the mold support frame 3. It is attached to the fixed block 1 and the moving block 2 (see FIG. 6) by a plurality of attachment members 22 attached to the back side. in this case,
A spring (not shown) may be interposed in the attachment member 22 so that the plate body 12 is elastically supported by the blocks 1 and 2. Gas inlet 14 of plate body 12
Is connected to a gas supply hose 23. After attaching the plate body 12 to the fixed block 1 and the moving block 2 in this manner, the nozzle plate 13 to which the gas supply nozzles 9 are attached in a desired arrangement corresponding to the internal shape of the core mold 5 to be used is attached. It is mounted on the plate body 12. After each burner plate 11 is installed at a predetermined position in each mold support frame 3, the mold mounting plate 4 on which the required core mold 5 is mounted is fixed to the mold support frame 3 with bolts 15. As a result, the core manufacturing apparatus becomes usable as shown in FIG.

When the core is manufactured, each of the gas supply nozzles 9 attached to the nozzle plate 13 of each of the burner plates 11 is ignited, and the core dies 5 and 5 are manufactured.
Are heated and the core dies 5 and 5 are joined to each other by the cylinder device 8, sand is filled in the core dies 5 and 5, and the sand is fired into a predetermined core shape. In each burner plate 11, the gas flow space 2 is formed over the entire area between the plate body 12 and the nozzle plate 13.
1 is formed, the gas introduced into the burner plate 11 from the gas supply hose 23 through the gas inlet 14 of the plate main body 12 flows through the gas flow space 21.
Thus, the gas is smoothly and uniformly distributed and supplied to each gas supply nozzle 9, and an appropriate flame can be jetted uniformly from each nozzle 9.

In the case where the core is manufactured using the core mold 5 and the original core mold 5 is replaced with another core mold 5 in order to manufacture a core having a different shape, The nozzle plate 13 of the burner plate 11 used so far is removed from the plate body 12, and the plate body 12 is placed in a desired arrangement state corresponding to the internal shape of the another core mold 5 to be newly used. What is necessary is just to attach the nozzle plate 13 to which the gas supply nozzle 9 is attached. When replacing the nozzle plate 13, it is necessary to perform a very troublesome operation such as rearranging a number of nozzles 9 and plugs 10 into an array corresponding to the core shape of the mold 5 to be replaced by attaching and detaching operations. Since it is only necessary to attach a desired nozzle plate 13 prepared in advance to the plate main body 12, the setup operation can be performed extremely efficiently, and the production efficiency can be significantly improved.

In this embodiment, the burner plate 11
Although only the gas supply nozzle 9 is attached to the nozzle plate 13, for example,
A large number of nozzle mounting holes are arranged in advance, and the gas supply nozzles 9 are used in combination with the plugs 10 as shown in FIG. The attached nozzle plate 13 may be formed.

[0016]

According to the first aspect of the present invention, a burner plate is provided with a plate main body provided with a gas inlet and a nozzle which is detachably mounted on the plate main body and has a gas supply nozzle mounted in a desired arrangement. When replacing the core mold with another core mold having a different internal shape, the nozzle plate of the burner plate used so far is removed from the plate body, and the plate body is formed. In addition, it is only necessary to attach a nozzle plate to which gas supply nozzles are attached in a desired arrangement corresponding to the internal shape of the above-mentioned other core mold,
It is not necessary to perform a very troublesome operation such as a conventional operation in which a large number of nozzles and plugs are detachably operated and rearranged into an arrangement corresponding to the core shape of another mold. Therefore, the setup work can be performed extremely efficiently, and the production efficiency can be significantly improved.

According to the second aspect, the gas flow space is formed over the entire area between the nozzle plate of the burner plate and the plate body, so that the gas introduced into the burner plate from the gas inlet is: The gas distribution nozzles are smoothly and uniformly distributed and supplied to the respective gas supply nozzles by the above-mentioned gas distribution space, so that an appropriate flame can be uniformly injected from each nozzle.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a burner plate which is a main part of a casting core manufacturing apparatus according to the present invention.

FIG. 2A is a side view showing a plate main body of a burner plate, and FIG. 2B is a front view thereof.

FIG. 3A is a side view showing a nozzle plate of a burner plate, and FIG. 3B is a front view thereof.

FIG. 4 is a front view showing another nozzle plate having a different arrangement of gas supply nozzles.

FIG. 5 is a front view showing still another nozzle plate having a different arrangement of gas supply nozzles.

FIG. 6 is a partially sectional plan view showing the entire casting core manufacturing apparatus.

FIG. 7 is a partially sectional front view showing a conventional burner plate.

FIG. 8 is a perspective view showing a gas supply nozzle.

FIG. 9 is a perspective view showing an embolus.

[Explanation of symbols]

 Reference Signs List 3 Mold support frame 5 Core mold 9 Gas supply nozzle 11 Burner plate 12 Plate body 13 Nozzle plate 14 Gas inlet 16 Plate body bottom wall 17 Plate body step wall 21 Gas flow space

Claims (2)

(57) [Claims] 1. A core mold is fixed to each of opposing surfaces of a pair of mold support frames which can be relatively separated from and separated from each other, and a plurality of gas supplies are provided on the back side corresponding to each core mold. In a casting core manufacturing apparatus equipped with a hollow burner plate in which nozzles are attached in a dotted manner, the burner plate is detachably mounted on a plate main body provided with a gas inlet and a plate main body. And a nozzle plate provided with gas supply nozzles in a desired arrangement. 2. The plate main body includes a bottom wall and a step wall around the bottom wall, and the nozzle plate is attached to the step wall of the plate main body. The casting core manufacturing apparatus according to claim 1, wherein a gas circulation space is formed.