JP3101428B2 - Casting method using green mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting method using a green mold, and more particularly to a technique for effectively eliminating the problem of odor generated from a core or foundry sand when pouring molten metal.

[0002]

2. Description of the Related Art Conventionally, in order to obtain a cast product having a desired shape, a predetermined molten metal casting operation has been performed using various molds. The law has become mainstream. In the green mold, sand composed of silica sand as an aggregate, a binder such as bentonite, water and various additives (carbonaceous additive, starchy additive, fiber additive, etc.) is added. It is molded by a molding machine to form a mold. In this green casting method, it is known that when pouring molten metal, gases such as H ₂ and CO are generated by decomposing water, carbonaceous material, and the like in the mold. The gas was odorless, so it was thought that there would be no environmental problems related to odor.

However, even in such a green mold, when a core is used, usually, a shell mold formed by using a phenol resin as a binder, or an organic self-hardening mold formed by using a furan resin or the like as a binder. A mold core is used, and a green mold main mold and a shell mold or organic self-hardening mold core are combined to perform casting. In the casting line, while the casting sand is being regenerated and the casting is repeatedly performed, it is inevitable that the return sand of the core is mixed into the green sand. Therefore, in reality, the gas generated at the time of pouring into the green mold is not only odorless but also CO ₂ and SO ₂ due to the thermal decomposition of the resin and the curing agent contained in the core and foundry sand. Gases that cause odors are generated. However, in the casting method using a green mold, no countermeasures have been taken against this problem.

On the other hand, in a casting method using an organic self-hardening mold, various measures have conventionally been taken in order to solve the problem of generation of odor due to thermal decomposition of the resin and the curing agent. Is coming. For example, as a combustion method, a method has been proposed in which an odor component generated from an organic self-hardening mold is oxidized at a high temperature, thereby decomposing and converting the odor component into an odorless gas, and deodorizing the gas. In addition, an adsorption method using physical adsorption of activated carbon, activated clay, or the like, or a chemical adsorption of an ion exchange resin or the like. A chemical liquid oxidizing cleaning method or the like in which oxidative decomposition is carried out by a chemical at the same time as the absorption of phenol by an absorbing liquid has been proposed, and it has been adopted according to the actual situation of a foundry.

[0005] However, those conventional deodorizing techniques are:
It is intended to treat the odor of the foundry from the aspect of pollution control, and because it is an odor countermeasure for the entire foundry, the equipment becomes significantly larger and the equipment cost becomes enormous.
For a relatively small company foundry, the use of such deodorizing techniques has been extremely difficult. Moreover, since the generation of odors in the foundry is not continuous, there is a big problem in how to efficiently process the generated odors.

[0006] Further, the conventional deodorizing technology as described above is intended for the entire casting factory from the viewpoint of pollution control, and therefore, from the viewpoint of improving the working environment of workers working in the casting factory. In fact, no consideration has been given to them, and they have hardly contributed to such improvement of the working environment.

[0007]

Accordingly, the present invention has been made in view of such circumstances, and a problem to be solved is to use a green mold casting method to deodorize at the odor source. In order to improve the working environment in the foundry, to effectively contribute to pollution control of the entire foundry, and without using large deodorizing equipment,
It is an object of the present invention to provide a technique capable of appropriately responding to the treatment of generated odor and further reducing the cost of deodorization.

[0008]

According to the present invention, in order to solve the above-described problems, a green mold having a casting cavity formed of green sand in a predetermined casting frame is used, and a predetermined molten metal is filled in the casting cavity. In casting the intended cast product, an intake layer is provided so as to be located inside the flask, and the intake layer is connected to an external exhaust passage, while From the upstream side, a suction unit, a compressor, a pressure accumulator, and a deodorizer formed by filling a deodorant in a predetermined container are sequentially provided, and when pouring the molten metal, odors generated from a core or molding sand. Or the gas is guided to the exhaust passage by the suction action of the intake means, and after being compressed by the compressor, the gas flows into the deodorizer via the pressure accumulator, and the odor or the gas is deodorized. Until the pressure in the vessel reaches a predetermined pressure, Casting method using a living-type which is characterized in that so as to remain in the vessel, it is to its gist.

Further, the present invention can be applied to a casting line. Advantageously, a casting cavity is formed of green mold sand in a predetermined flask, and an intake layer is formed inside the flask. Provided, at least two exhaust holes communicating with the intake layer are provided in the casting flask, while moving the green mold sequentially on the casting line, pouring a predetermined molten metal into each casting cavity, Then, while performing the solidification, a plurality of suction pads are arranged at predetermined intervals so as to be connected to any of the exhaust holes of each green mold on the casting line, and a first suction pad group is provided, A plurality of suction pads are arranged at predetermined intervals so as to be connected to the other ones of the exhaust holes of each green mold, a second suction pad group is provided, and the first and second suction pad groups are arranged. , And connect it to the external exhaust passage, While the pulling pad group is moved by one section in the traveling direction together with the green mold while being connected to the exhaust hole of the green mold, one of the other suction pad groups is moved by one section in the reverse direction and returned. By switching the connection / separation state of the first and second suction pad groups with respect to the green mold, while the suction pad group previously returned by one section is advanced with the green mold by one section, the suction advanced by one section first By returning the pad group by one section and alternately connecting the first and second suction pad groups to each green mold on the casting line, an exhaust passage is continuously provided to the intake layer of each green mold. To be connected,
Further, on the exhaust passage, an intake means, a compressor, a pressure accumulator, and a deodorizer formed by filling a deodorant in a predetermined container are sequentially provided from the upstream side, and when pouring the molten metal, In the same manner as described above, the odor or gas generated from the sand and casting sand is guided to the exhaust passage, and then flows into the deodorizer so that the odor or gas stays until the pressure in the deodorizer reaches a predetermined pressure. It is.

[0010]

FIG. 1 schematically shows an example of a green mold and an exhaust passage connected thereto, which are configured to carry out the casting method according to the present invention. The upper mold 2 and the lower mold 4 that constitute an integrated green mold in the superposed state each have an exhaust passage formed by connecting an air hose 34 thereto.
On the exhaust passage, a vacuum pump 8, a compressor 10, a pressure accumulator 12, and a deodorizer 14 are sequentially provided from the upstream side, and the end of the passage is opened as an exhaust port 16. Further, an electromagnetic valve 18 is provided upstream of the deodorizer 14 and a relief valve 19 is provided downstream thereof.

FIGS. 2 and 3 show the structure of the raw form in detail. In these figures, the green mold is formed by superimposing an upper mold 2 and a lower mold 4 on a surface plate 6, and a casting cavity 20 for giving a desired product shape is formed therein. ing. A core 28 is accommodated in the casting cavity 20, and the core 28 is formed of a shell type or an organic self-hardening mold. The upper mold 2 and the lower mold 4 are each formed by filling a green mold sand 26 into a rectangular upper frame 22 and a lower frame 24 as a casting frame, respectively, and have a rectangular parallelepiped shape as a whole. Through a gate 30 provided in the upper mold 2, a predetermined molten metal is poured into the casting cavity 20.
It is to be guided inside.

The upper mold 2 and the lower mold 4 respectively have
A predetermined perforated plate 31 having rigidity, such as a punched metal, is provided along the entire length inside the upper frame 22 and the lower frame 24, and the upper frame 22 and the lower frame 2 which are located outside the perforated plate 31.
4, an intake layer 32 is formed as a ventilation space. Since the inside of the perforated plate 31 is filled with the green sand 26, the perforated plate 31 is
The green sand 26 is formed so as to have a large number of pores of a size that does not leak to the intake layer 32. Further, the porous plate 31 may be provided with a plurality of porous plates 31 having different pore sizes in consideration of air permeability.

Further, in this case, the intake layer 32 is
2 and along the inner peripheral surface of the lower frame 24 over its entire length, but the odor and gas generated in the core and the molding sand are effectively sucked without leaking to the outside. If so, the intake layer 32 may be provided only in a region of a predetermined length on the inner peripheral portion of the flask (22, 24). However, for the effective suction of such odor or gas, a rectangular flask (2
2, 24), the opposite at least 2
It is desirable that the intake layer 32 be provided inside the side.

Incidentally, such a raw type (upper type 2, lower type 4)
Molding is performed in accordance with the conventional method, and the same green sand is used as in the past. For example, bentonite (binder) and water are added to silica sand, and a carbonaceous additive, starch Additives such as a fiber additive and a fiber additive are appropriately blended. And first,
A flask (22, 24) having a perforated plate (31) attached to the inner peripheral surface thereof is placed on a predetermined platen.
2 and 24), the desired product cavity shape (2
In a state where the model giving the predetermined portion of 0) is arranged, the green sand (26) is charged. Thereafter, the die is removed and the removed model is immediately returned to the previous filling step so that it can be used for the next molding, while the resulting molds (2, 4) are coated as required. It is transferred to the mold process and coated.

The molding of the core 28 is also performed in accordance with the conventional method.
The same as the conventional one is used, for example, a molding sand material such as silica sand, a resin such as a furan-based resin, a phenol-based resin, an acrylic resin is blended as an organic binder, and such a resin is cured. For the purpose of the present invention. In addition, inside the core 28,
A predetermined volume-increasing material may be filled, whereby the amount of organic self-hardening molding sand used can be effectively reduced and cost can be reduced. The odor or gas generated in the core 28 when the molten metal is poured can easily be led to the outer peripheral side of the upper mold 2 and the lower mold 4. When a volume-increasing material is used, a heat-resistant volume-increasing material such as a metal material having various shapes such as flakes, spheres, and blocks, and a ceramic material is filled.

The upper mold (2) and the lower mold (4) are
The mold is assembled with the separately formed core (28) on the surface plate (6) to assemble into a mold structure as shown in FIG.

Incidentally, the upper mold 2 and the lower mold 4 include:
One exhaust hole 36 communicating with the intake layer 32 is formed on each of a pair of opposed side walls of the upper frame 22 and the lower frame 24, and an outer opening of each exhaust hole 36 has an annular shape. A flange 37 having a shape is integrally attached. Then, a suction pad 5 described later is attached to the flange 37.
By contacting 0, an external exhaust passage is connected to the intake layer 32.

On the other hand, a plurality of air cylinders 54 supported by a support plate 52 are provided at a position separated by a predetermined distance from a pair of side walls on which the raw exhaust holes 36 are provided.
Are arranged corresponding to the respective exhaust holes 36 of the upper mold 2 and the lower mold 4 (only those located on the right side of the green mold are shown in FIG. 2). Is supplied, the piston 56 is moved forward and backward with respect to the green mold. A metal suction pad 50 having an air passage 49 is attached to the tip of the piston 56, and the suction pad 50 further communicates with the air passage 49.
The tip of the air hose 34 of the exhaust passage described above is attached. Reference numeral 51 denotes an annular rubber plate adhered and fixed to the distal end surface of the suction pad 50.

Therefore, the piston 56 of the air cylinder 54
The connection / separation state of the suction pad 50 with respect to the green mold is switched by the forward and backward movement of the suction pad 50. If the suction pad 50 is brought into contact with the flange 37 of the exhaust hole 36 of the green mold, The exhaust passage can be connected to the intake layer 32 of the mold. The inside of the upper mold 2 and the lower mold 4 are sucked and exhausted through the suction layer 32 by the suction action of the vacuum pump 8.

As the vacuum pump 8 installed on the exhaust passage, various well-known vacuum pumps which have been used conventionally can be used, and the compressor 10 and the pressure accumulator provided on the exhaust passage on the downstream side thereof can be used. Various known devices are used as the container 12.

On the other hand, FIG. 4 shows an example of the structure of the deodorizer 14 installed on the exhaust passage. Here, reference numeral 38 denotes a container body, in which four steel pipes 40 are arranged in parallel with each other and fixed by welding. As a result, a meandering bent passage is formed from the inlet 42 to the outlet 44 sequentially passing through the inside of each steel pipe 40, and a predetermined granular or massive form of zeolite or the like is formed in the passage. Of the deodorant 46 is filled. Reference numeral 48 denotes a gas-permeable filter attached to prevent the deodorant 46 from leaking.
The perforated plate 31 and the like disposed inside 4) are attached. Therefore, the odor or gas introduced from the inflow port 42 is effectively brought into contact with the deodorant 46 while passing through the meandering passage, and is effectively adsorbed.

The deodorizing agent 46 is based on the removal of odors by adsorption. Generally, an adsorbing deodorizing agent such as zeolite, activated carbon, sepilite or the like is used. In order to maintain the temperature, it is necessary to periodically replace the material, and it is desirable that the cost is low. Therefore, the use of artificial zeolite using fly ash as a raw material is most advantageous over natural zeolite.

In the casting method according to the present invention,
When a predetermined molten metal, such as molten cast iron or molten steel, is poured into the mold having an exhaust passage obtained in this manner from the gate 30 according to a conventional method, the air cylinder 54 is immediately thereafter. Of the upper frame 2 by projecting the piston 56 of the upper frame 2 to connect the suction pad 50 to the exhaust hole 36 of the mold.
By connecting an air hose 34 to the air suction layer 32 inside the lower frame 2 and the lower frame 24, the air is sucked by the vacuum pump 8 as the suction means through the air hose 34. As a result, the odor or gas generated from the molding sand and the core 28 in the vicinity of the casting cavity 20 which comes into contact with the molten metal is effectively sucked and removed, and the intended casting is cast. . At this time, since the mold is provided with the suction layer 32 for equalizing the suction, the suction through the air hose 34 can be performed stably.

The upper part of the upper mold 2 and the lower part of the lower mold 4 are
Since it is less affected by heat and is generally filled with fine sand, it acts as a seal against the outside, and the odor or gas as described above flows well to the intake layer 32 side. Also, as described above, the air hose 3
When the inside of the mold (2, 4) is sucked in through the mold 4, the gas generated at the time of pouring the molten metal becomes
It is quickly led to the suction layer 32 through the space, quickly sucked from the entire mold, and removed to the outside,
It is also possible to exert a great effect in preventing occurrence of casting defects (gas defects) in a cast product due to such generated gas.

The odor or exhaust gas thus led to the exhaust passage is compressed by the compressor 10 after passing through the vacuum pump 8 and is accumulated in the accumulator 12. Then, when the electromagnetic valve 18 is periodically opened, the electromagnetic valve 18 is forcibly fed into the deodorizer 14, passed through a deodorant 46 such as zeolite, and deodorized. Moreover, at this time, since the relief valve 19 is provided downstream of the deodorizer 14, the odor or the exhaust gas is not simply passed through the deodorizer 14, but the odor or the exhaust gas is It will be sealed in the deodorizer 14 until it reaches full pressure and reaches a predetermined pressure, and will be retained.

As a result, the concentration of gas in the deodorizer 14 is increased, and the contact time between the gas and the deodorant 46 is extended, so that the chance of contact between the odor or exhaust gas and the deodorant 46 is increased. As a result, the odor in the gas is adsorbed extremely effectively, and the amount of the gas adsorbed and removed is increased. As a result, the deodorizing efficiency can be greatly improved. Thereafter, when the pressure in the deodorizer 14 becomes equal to or higher than a predetermined value, the relief valve 19 is opened, and the deodorized clean air is discharged to the outside through the exhaust port 16.
Since the air discharged to the outside has a high pressure, it is desirable to attach a silencer to the exhaust port 16.

In the present invention, the suction from the mold (2, 4) through the air hose 34 is sufficient for a few minutes immediately after pouring in which odor or gas is generated from the core 28 or molding sand. Is the piston 5 of the air cylinder 54
6, the suction pad 50 may be separated from the green mold, and the mold (2, 4) may be cut off from the external suction means (vacuum pump 8).

Then, when the cooling and solidification of the poured molten metal is completed, the molds (2, 4) are separated, and the casting product formed in the mold is taken out. On the other hand, magnetism separates inclusions such as casting burrs, iron pieces, iron powder, and the like mixed in the molding sand from the molding sand that has been separated. When a volume increasing material is used for the core 28, the volume increasing material is separated from the molding sand by an appropriate separating device, and the molding sand and the volume increasing material are collected and reused. Becomes In addition, the foundry sand is separated into green sand and core sand as much as possible, and is reused. However, it is inevitable that a small amount of core sand is mixed into the green sand.

Incidentally, such a casting method using a green mold according to the present invention can be applied to a casting line, and FIGS. 5A to 5D show the present invention applied to a casting line. An example is shown. First, in FIG.
Are each a green mold having a structure as described above,
This has an intake layer 64 inside the flask and two exhaust holes 66 communicating with the intake layer 64 in the upper mold and two in the lower mold. And, each of the green molds 62 is a belt conveyor 6.
At the left end in the drawing, a predetermined molten metal is poured into the casting cavity from the sprue 68 and then solidified while being sequentially moved to the right. It is supposed to be.

Further, on both sides of the belt conveyor 60,
Each is provided with a suction pad group including a plurality of suction pads, and each suction pad is connected to an exhaust passage (not shown) including the above-described vacuum pump, compressor, accumulator, and deodorizer. Have been. By connecting the suction pad groups to the exhaust holes 66 of each of the molds 62, an exhaust passage is connected to the intake layer 64 of the mold 62, and the odor or gas generated in the mold during pouring is removed by the exhaust passage. Is to be led to.

The first suction pad group 70 disposed on the left side (upper side in the figure) in the traveling direction of the belt conveyer 60 is moved to the forward position shown in FIG.
An air cylinder (not shown) as shown in FIG. 3 corresponds to each green mold 62 with respect to a long plate-like support plate 72 which can be reciprocated between the retracted position shown in FIG. The air cylinders are arranged two at a time and two at the top and bottom, and a total of eight are attached, and suction pads 74 are attached to the tips of the pistons of the respective air cylinders.
In FIG. 5A, the pouring is performed on the green mold V, the first suction pad group 70 is in the forward position, and each suction pad 74 has been poured. The odor or gas generated in the mold is sucked by being brought into contact with one of the upper and lower exhaust holes 66 of the fresh molds I to IV.

On the other hand, the second suction pad group 76 disposed on the right side (the lower side in the figure) in the traveling direction of the belt conveyor 60 is moved to the retracted position shown in FIG. An air cylinder (not shown) as shown in FIG. 3 corresponds to each green mold 62 with respect to a long plate-like support plate 72 which can be reciprocated between a forward position shown in FIG. Are arranged at intervals of two and two at the top and bottom, and a total of eight are attached. At the tip of the piston of each air cylinder,
Each is configured with a suction pad 74 attached thereto. Further, in FIG. 5A, the second suction pad group 76 is at the retracted position, and each suction pad 74 is
The raw mold V during pouring and the other one of the upper and lower exhaust holes 66 of the preceding three green molds II to IV are arranged in a separated state.

Here, the suction pad groups 70, 7
6, four suction pads are arranged in the left-right direction. In practice, it is assumed that one pouring takes 30 seconds, and when suction is performed for about 4 to 5 minutes immediately after pouring, About ten suction pads are arranged in the left-right direction of each suction pad group 70, 76.

Next, when the pouring of the green mold V is completed in the state of FIG. 5 (a), the air cylinders of the first and second suction pad groups 70 and 76 are immediately operated, and FIG.
As shown in (b), the connection / separation state between the first suction pad group 70 and the second suction pad group 76 with respect to the green mold 62 is switched, and the second suction pad is replaced with the first suction pad group 70. In group 76, the odor or gas generated in the mold is sucked. In addition, since the generation of the odor or the gas is almost finished, the suction of the green mold I is completed, and thereafter, the raw mold I is sequentially moved on the belt conveyor 60 until the cooling and solidification is completed. And the belt conveyor 60
With the movement of the second suction pad group 76, the raw molds II to V
In the state of being connected to the exhaust holes 66, the molds II and V are moved by one section in the advancing direction and advance to the advance position, during which the first suction pad group 70 is moved by one section in the reverse direction. 5 (c).

In FIG. 5 (c), a new green VI is placed at the pouring position, and during the pouring of the green VI, the second suction pad group 76 moves to the green II. , And suction is performed, while the first suction pad group 70 is arranged in a separated state with respect to the green molds III to VI. Thereafter, when the pouring of the green mold VI is completed, the connection / separation state of the first suction pad group 70 and the second suction pad group 76 with respect to the green mold 62 is switched in the same manner as described above, and FIG. ), The odor or gas generated in the mold is sucked by the first suction pad group 70, and the suction of the raw mold II ends.
Then, with the movement of the belt conveyor 60, the first suction pad group 70 moves one section in the traveling direction together with the green molds III to VI while being connected to the exhaust holes 66 of the green molds III to VI, It will advance to the forward position and continue suction at that position. In the meantime, the second suction pad group 76 moves by one section in the reverse direction, returns to the retreat position, and is arranged at that position in a state of being separated from the new green mold VII and the new molds IV to VI. It will be done.

That is, in the casting method using such a green mold, the first and second suction pad groups 70,
By alternately connecting 76, an external exhaust passage is continuously connected to the intake layer 64 of each green mold 62 for several minutes immediately after pouring, so that the odor or The gas is efficiently guided to the exhaust passage by the suction action of the vacuum pump on the exhaust passage.
Then, the odor or gas guided to the exhaust passage is compressed by the compressor 10 after passing through the vacuum pump 8,
The gas is accumulated in the pressure accumulator 12 and is periodically sent to the deodorizer 14 by periodically opening the solenoid valve 18 to be deodorized. Moreover, at that time, the odor or the exhaust gas is filled with the odor or the exhaust gas in the deodorizer 14,
Until the predetermined pressure is reached, the deodorizer 14 is contained and retained in the deodorizer 14, so that extremely effective deodorization can be performed.

Although the specific configuration of the present invention and the operation thereof have been described based on the typical specific examples of the present invention, the present invention is not limited to such specific specific examples. Without departing from the spirit of the present invention, based on the knowledge of those skilled in the art, various changes, modifications, improvements, and the like can be performed. It should be understood that the invention includes.

For example, in the above-mentioned casting line, the exhaust hole 66 of the green mold 62 is open to the outside, but when it is not connected to the suction pad groups 70 and 76, the exhaust hole 66 is closed by a predetermined closing means. You may do so.

[0039]

As is apparent from the above description, in the casting method using the green mold according to the present invention, an intake layer is provided inside the green mold frame, and an exhaust passage is formed in the intake layer. When the molten metal is poured into the mold, the odor or gas generated from the core or foundry sand is guided to the exhaust passage by the suction action of the external suction means, and the gas is further compressed. And the gas is retained in the deodorizer until the pressure in the deodorizer reaches a predetermined pressure. Therefore, such an odor or gas can be extremely effectively adsorbed and removed by the deodorant filled in the deodorizer, and the release to the outside of the mold can be effectively prevented. In other words, deodorization at the odor source can be effectively achieved, and the working environment in the foundry can be advantageously improved. In addition, this deodorizer has the advantages that it is very small in capacity, can save a lot of installation space, is inexpensive in cost, and has enormous equipment for pollution control in foundries, as compared with conventional deodorizers. It can greatly contribute as a practical deodorizer without investment.

When the present invention is applied to a casting line, the first suction pad group and the second suction pad group are alternately connected to the exhaust hole communicating with the green air suction layer. Thereby, continuous inhalation can be performed without hindering the movement of the raw mold, thereby enabling efficient deodorization.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing an example of a configuration of a green mold used in the present invention and an exhaust passage connected thereto.

FIG. 2 is an explanatory longitudinal sectional view showing the green mold in FIG. 1;

FIG. 3 is an explanatory cross-sectional view showing, on an enlarged scale, a connecting portion between a green mold and an exhaust passage in FIG.

FIG. 4 is an explanatory longitudinal sectional view showing the deodorizer in FIG. 1;

FIG. 5 is a flow chart of a line showing an example in which the present invention is applied to a casting line, in which (a) is a state in which a raw mold V is poured, and (b) is a first and a second suction pad. A state in which the connection / separation state of the groups is switched, (c) is a state in which the first and second suction pad groups are moved and then poured into the raw mold VI, and (d) is a first and second state. 2 shows a state in which the connection / separation state of the suction pad group is switched again.

[Explanation of symbols]

 2 Upper mold 4 Lower mold 8 Vacuum pump 10 Compressor 12 Pressure accumulator 14 Deodorizer 16 Exhaust port 18 Solenoid valve 19 Relief valve 20 Casting cavity 22 Upper frame 24 Lower frame 26 Green sand 28 Core 30 Gate 30 Perforated plate 32 Intake layer 34 Air Hose 36 Exhaust Hole 38 Container Main Body 40 Steel Pipe 46 Deodorant 50 Suction Pad 52 Support Plate 54 Air Cylinder 56 Piston 60 Belt Conveyor 62 Raw Form 64 Intake Layer 66 Exhaust Hole 68 Sluice 70 First Suction Pad Group 72 Support Plate 74 Suction Pad 76 Second suction pad group

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B22C 1/00 B22C 5/00-9/30 B22D 18/00-18/08 B22D 33/00-47 / 02 B01D 53/34

Claims (2)

(57) [Claims] 1. A casting mold having a casting cavity formed of green mold sand in a predetermined molding flask, and a predetermined molten metal is poured into the casting cavity to cast a target casting product. An intake layer is provided so as to be located inside the flask, and the intake layer is connected to an external exhaust passage. On the exhaust passage, an intake means, a compressor, a pressure accumulator, and a predetermined A deodorizer filled with a deodorant is sequentially provided in the container, and at the time of pouring the molten metal, an odor or gas generated from a core or foundry sand is led to an exhaust passage by a suction action of the suction means. After being compressed by the compressor, the compressed gas is allowed to flow into the deodorizer via the pressure accumulator, and the odor or gas is removed from the deodorizer until the pressure in the deodorizer reaches a predetermined pressure. Using a green mold characterized by being retained in The casting process. 2. A casting cavity is formed in a predetermined molding flask with green mold sand, an intake layer is provided inside the molding flask, and at least two exhaust holes communicating with the intake layer are formed in the molding flask.
While the molds provided are sequentially moved on a casting line, a predetermined molten metal is poured into each casting cavity and solidification is performed, while exhaust holes of each mold on the casting line are formed. , A plurality of suction pads are arranged at predetermined intervals to provide a first suction pad group, and a plurality of suction pads are connected to each other Are arranged at predetermined intervals, a second suction pad group is provided, and the first and second suction pad groups are connected to an external exhaust passage, and either one of the suction pad groups is connected. While moving one section in the traveling direction together with the green mold while connected to the exhaust hole of the green mold, one of the other suction pad groups is moved one section in the opposite direction and returned, and then the first and Connect and separate the second suction pad group to the green mold By switching, while the suction pad group that was previously returned by one section is advanced by one section together with the green mold, the suction pad group that was previously advanced by one section is returned by one section, and to each green mold on the casting line, By alternately connecting the first and second suction pad groups, an exhaust passage is continuously connected to each raw air intake layer, and further, on the exhaust passage, from the upstream side A suction device, a compressor, a pressure accumulator, and a deodorizer in which a deodorant is filled in a predetermined container are sequentially provided, and when pouring the molten metal, an odor or gas generated from a core or molding sand is removed. After being guided to the exhaust passage by the suction action of the intake means and compressed by the compressor, the gas flows into the deodorizer via the pressure accumulator, and the odor or gas is compressed by the pressure in the deodorizer. Until it reaches a predetermined pressure. A casting method using a green mold characterized by the following.