JPS6048263B2 - mold making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a mold making machine that blows foundry sand into a mold for mold making to make a mold. The present invention relates to a mold making machine that facilitates mold making.

Prior Art The time allowed for the molding sand used in mold making machines to harden in the mold for mold making after preparation is extremely short, and the usable time is only within a few minutes to several hours. There may be no.

In such cases, there is no problem when mold making work is carried out continuously and molding sand is used one after another, but when the mold making machine is stopped for a long time, such as at the end of work, Since the usable time of the foundry sand left in the machine has expired, it is necessary to clean the foundry sand left in the blow head that blows the foundry sand into it. Jikoko 48-
The apparatus described in No. 3,489 and Japanese Patent Publication No. 47-38,623 is an example of such a mold making machine. In the former, the bottom plate of the blow head is not removable but is integrated.
The latter type has a blow plate removably attached to the underside of the blow head, so the inside of the blow head can be cleaned. Problems to be Solved by the Invention However, according to such a conventional mold making machine, when the blow plate is removed from the blow head and placed on the cleaner plate of the cleaner table, the cleaner pins provided upright on the cleaner plate are removed from the blower. It penetrates the blow nozzle of the plate and cleans the inside of the nozzle, but if you try to clean the top surface of the blow plate in this state, the cleaner pin protruding from the blow nozzle will interfere, reducing the cleaning work efficiency. Moreover, it was not possible to completely clean the blow plate.

Therefore, if the molding sand left inside the blow head is not completely cleaned, please clean it during the next mold making operation. The quality of the mold is greatly affected by the molding sand that has passed its usable time. Means for Solving the Problems The present invention has been made against the background of the above circumstances, and its purpose is to solve the problems. Inside the door,
In particular, it is an object of the present invention to provide a mold making machine in which the blow plate on which the blow nozzle is formed can be cleaned reliably and efficiently.

In order to achieve such an object, the gist of the present invention is to provide a blow plate which is detachably provided with a nozzle that opens downward, and which is positioned in a blowing position and a non-blowing position, In a mold making machine equipped with a blow head that blows molding sand through the nozzle into the mold when in the blowing position, 1) when the blow head is in the non-blowing position, the blow head is located below the blow plate; a pedestal facing the blow plate; (2) a pedestal protruding toward the nozzle at a position corresponding to the nozzle of the pedestal and formed to a thickness that can be inserted into the nozzle; When supported by the cradle, a protruding rod whose tip is formed at a height that exactly matches the top surface of the blow plate; (3) the pedestal and the blow head are brought relatively close together to receive the blow plate (4) a vertical drive device for supporting the protruding rod on the stand and inserting the protruding rod into the nozzle; (4) when the blow plate is removed from the blow head and supported on the pedestal, a The scraper device is provided with a scraper device that moves relatively along the upper surface of the scraper device while making sliding contact with the scraper device.

Function and Effect of the Invention In this way, when the blow plate is supported by the pedestal and removed from the blow head, the molding sand in the nozzle of the blow plate is removed by the protruding rod, making it easy to clean the inside of the nozzle. When the blow plate is supported on the pedestal, the tip of the protruding rod inside the nozzle is exactly aligned with the top surface of the upper plate, so that the molding sand on the blow plate does not touch the protruding rod. Since the scraper scrapes off the sand smoothly without any interference, the molding sand on the blow plate can be cleaned completely and efficiently.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIG. 1, a frame 10 is provided with a cylinder 12 whose head throat projects upward, and a lower die 14 is fixed to the tip of a rod of the cylinder 12, and the lower die 14 is moved up and down. It's becoming like that.

At a position above the lower mold 14, an upper mold 16 opposing the lower mold 14 is provided.
is removably supported horizontally by a pin 18,
When the lower mold 14 is raised by the cylinder 12,
A lower mold 14 is matched with an upper mold 16. On the other hand, a rail 24 extending in the horizontal direction is fixed to the frame 10, and two carts 21 and 23 are connected to each other and supported by wheels 25 running on the rail 24. Gushing head 20 and blow head 2
2 is connected to the carts 21 and 23 by a spring mechanism (not shown).
Each is suspended so that it can move up and down.

Therefore, the crimp cylinder 2 provided on the upper part of the frame 10
Gushing head 20 or blow head 2 depending on 6
2 is pressed down, the lower surface of the gassing head 20 or the blow head 22 is pressed against the upper surface of the upper die 16. For example, when moved to the right in FIG. 1, the gugging head 20 is positioned directly above the upper mold 16, and the pressure cylinder 26 provided on the film 10 above moves the gagging head 20 downward. The gashing head 20 is pressed down onto the upper surface of the upper die 16.
The bottom surface of the is brought into close contact. At this time, curing gas is supplied into the gashing head 20 by a vibrator or the like from a gas generator (not shown), and from the gashing head 20 to the upper mold 16.
It is blown into the cavity formed in the lower mold 14 through the hole. At this time, the blow head 22 is in the non-blowing position, and the hopper 28 provided at the top of the frame 10
It is now possible to receive supplies of foundry sand from Then, when the gassing head 20 and the blow head 22 are moved to the left, the blow head 22 is located directly above the upper mold 16, and the pressure cylinder 26 causes the blow head 22 to move to the left.
2 is pushed down, and the head 22 is pressed down to the upper die 16.
When the lower surfaces of the blow head 22 are brought into close contact with each other, the molding sand in the blow head 22 is blown into the lower mold 14 through the upper mold 16. As shown in detail in FIG. 2, the blow head 22 has a plurality of nozzles 3 opening downward at its lower part.
A blow nozzle with a number 0 formed thereon is detachably attached horizontally.

That is, the upper edge of the blow plate 32 is provided with a fixed pawl 34 for engagement, and the blow head main body 36 is provided with a rotary pawl 38 that is rotated by a cylinder 37. When the rotary claw 38 engages with the fixed claw 34, the blow plate 32 is moved to the blow head main body 36.
is fixed to the bottom of the Below the blow head 22 in the non-blowing position, a pedestal 42 is disposed facing the blow plate 32 and has a protruding rod 40 that protrudes upward at a position corresponding to the nozzle 30 of the chain plate 32. There is.

The pedestal 42 is a cylinder 44 provided on the frame 10.
It is rotatably attached by a horizontal pin 48 to one end of a horizontal upper and lower plate 46 that can be moved up and down by a horizontal pin 48. The upper and lower plates 46 are provided with a gear box 52 that is driven by a handle 50 that forms a pedestal drive device, and a sprocket fixed to the output shaft of the gear box 52 and the rotation center of the pedestal 42 are connected to each other. A chain 54 is hung between the coaxially fixed sprocket,
As the handle 50 is rotated, the pedestal 42 is tilted to a substantially vertical position. In addition, 56
is a guide rod that prevents horizontal rotation of the upper and lower plates 46. The pedestal 42 has a box-like shape with an open top surface and a peripheral wall 58 with an upright peripheral edge. The upper end of the blow plate 32 is supported, and after the rotary claw 38 is removed from the fixed claw 34,
The blow plate 32 is placed on a pedestal 42 and is lowered by a cylinder 44. That is, the cylinder 44 constitutes a vertical drive device that moves the pedestal 42 and the blow head 22 relatively toward and away from each other. Further, at the same time that the blow plate 32 is placed on the pedestal 42, the protruding rods 40 are inserted into the holes 60 of all the nozzles 30, so that the molding sand in the holes 60 is pushed out by the protruding rods 40. It's getting old.

Further, the height of the protruding rod 40 is determined so that when the protruding rod 40 is pushed into the hole 60, it coincides with the upper surface of the blow plate 32. The protruding rod 40 has a cylindrical shape with a diameter smaller than the inner diameter of the hole 60, and can be inserted into the hole 60 without interference.As shown in detail in FIG. An air nozzle 62 is formed so that air is blown out in a direction substantially perpendicular to the longitudinal direction of the protruding rod 40 through the air nozzle 62 from an air supply hole (not shown) that runs vertically through the center of the protruding rod 40. It's getting old.
The height of the protruding rod 40 can be determined by returning to FIG. A scraper 66 that slides into contact with the upper surface of the blow plate 32 placed on the pedestal 42 when rotated to the position, and an air nozzle 68 that blows air toward the upper surface are integrally provided. The cylinder 64, the scraper 66, etc. form a scraper device. The operation for cleaning the blow head 22 when the fully loaded mold making machine is stopped will be described above. First, when the rod of the cylinder 44 is projected upward and the pedestal 42 comes into contact with the lower surface of the blow plate 32 fixed to the blow head 22, the cylinder 37 engages the rotary claw 38 and the fixed claw 34. is unwound and the blow plate 32 is placed on the pedestal 42. Then, when the rod of the cylinder 44 is retracted, the pedestal 42 and the blow plate 32 are moved downward, and the blow head 22 is moved downward.
and the blow plate 32 are separated, and the blow head 2
2, especially the blow plate 32, can be cleaned. FIG. 1 shows this state, in which a large amount of molding sand 69 left in the blow head 22 is placed on the blow plate 32. Next, when the handle 50 is operated, the pedestal 42 is tilted with a light operating force based on the reduction ratio of the gear box 52, and rotated approximately vertically to the position shown by the two-dot chain line in FIG. It will be done.

Therefore, a large amount of molding sand left on the blow plate 32 is slid down all at once by the slope, so that the molding sand is removed from the upper surface of the blow plate 32 in an extremely efficient manner. At this time, since the protruding rod 40 is inserted into the hole 60 of the nozzle 30, all the molding sand filled in the hole 60 is removed. Further, when the cylinder 64 is operated, the scraper 66 and the air nozzle 68 are moved downward along the upper surface of the blow plate 32, so that the scraper 66 scrapes off a small amount of molding sand that has adhered to the blow plate 32. At the same time as being dropped. In addition, the air blown from the air nozzle 68 cleans the upper surface of the blow plate 32 reliably and efficiently. At this time, since the tip of the protruding rod 40 is aligned with the upper surface of the blow plate 32, the hole 60
No molding sand 69- is left inside, and there is no interference with the scraper 66. At the same time, air is ejected from the air nozzle 62 of the protruding rod 40, so that the protruding rod 40 and the hole 62
The molding sand 69 between the two is blown away cleanly. After cleaning the blow plate 32, the handle 50 is operated in the reverse order to rotate the pedestal 42 until it becomes approximately horizontal, and the blow plate 32 and the pedestal 42 are rotated by the cylinder 42. is pushed up toward the blow head main body 36 and when the blow plate 32 comes into contact with the blow head main body 36, the rotating claw 38 is driven by the cylinder 37 and the fixed claw 34 and the rotating claw 38 are engaged with each other. The blow plate 3 is attached to the blow head 22.
2 can be attached.

As described above, according to this embodiment, since the protruding rod 40 that is inserted into the holes 60 of all the nozzles 30 is provided on the pedestal 42 on which the blow plate 32 is received, the molding sand in the holes 60 can be removed. Cleaning can be done reliably and easily without overlooking anything.

Furthermore, since the pedestal 42 is tilted to a substantially vertical position, a large amount of molding sand left on the upper surface of the blow plate 32 is removed at once, making the conventional cleaning work of removing a large amount of molding sand extremely efficient. It becomes. And nozzle 30
Since the tip of the inner protruding rod 40 coincides with the upper surface of the blow plate 32, the scraper 66 that slides along the upper surface of the blow plate 32 and the air nozzle 68 that injects air toward the upper surface interfere with the protruding rod 40. Therefore, the slight amount of molding sand adhering to the upper surface of the blow plate 32 can be completely removed without the need for manpower. Furthermore, since the protruding rod 40 is provided with the air nozzle 62, the inside of the hole 60 of the nozzle 30 can be reliably cleaned, and a sufficient clearance can be provided between the hole 60 and the diameter of the protruding rod 40. , there is an advantage that interference between the protruding rod 40 and the hole 60 can be prevented.

Next, another embodiment of the present invention will be described.

It should be noted that the same reference numerals are given to the same parts as those in the above-mentioned embodiments, and the explanation thereof will be omitted. In Fig. 4, blow head 2
2 can be moved up and down by a pair of cylinders 70 fixed to the frame 10, and the blow head 22 is moved up and down by a pair of cylinders 70 fixed to the frame 10. ? The upper mold 16 located below the head 22 when raised to the non-blowing position by the
A gassing head 20 or a pedestal 42 is movable between the two.

That is, a rail 72 extending in the horizontal direction is fixed to the frame 10, and wheels 74 that run on the rail 72 are attached to the gushing head 20 and the pedestal 42. 42 can be moved horizontally and alternatively positioned between the probe head 22 and the upper mold 16. Here, the cylinder 70 serves as a vertical drive device that allows the pedestal 42 and the blow head 22 to approach each other relatively. flame 10
The blow plate 32 is placed on the pedestal 42,
When the pedestal 42 moves along the rail 72, a scraper 76 that moves relative to the upper surface of the blow plate 32 and slides thereon is fixed.

Therefore, the rail 72, the scraper 76, etc. form a scraper device. In the mold making machine configured as described above, the blow plate 32 is placed on the pedestal 42 according to the same operation as in the previous embodiment, and when the pedestal 42 is moved to the right in FIG. A scraper 76 that slides on the upper surface of the blow plate 32 automatically scrapes off a large amount of molding sand left on the blow plate 32 and collects it in a packet 80 through a chute 78.

According to the embodiment, in addition to the same effects as described above, the structure of the mold making machine can be easily constructed without changing the mechanism so much, so that the apparatus has the advantage of being simple and inexpensive. Although the embodiment of the present invention has been described above based on the drawings, the present invention can also be applied to other aspects.

For example, in the embodiment shown in FIG. 1, the pedestal 42 is rotated to a substantially vertical position, but it may be configured to be rotated to an angle that allows the molding sand to slide down sufficiently. be.

In such a case, there is no need to provide a special clamping mechanism on the pedestal 42 to prevent the blow plate 32 from falling off. In addition, in order to rotate the pedestal 42,
Although the handle 50 is configured to be operated by an operator, it may also be driven by an electric motor or the like. In such a case, there is an advantage that the blow plate 32 can be cleaned completely automatically with almost no human effort required. Alternatively, the cylinder 64 may be provided horizontally without providing a mechanism for rotating the pedestal 42, and the scraper 66 may be relatively moved along the upper surface of the blow plate 32 in a horizontal state. The above-mentioned embodiment is merely one embodiment of the present invention, and various modifications may be made to the present invention without departing from the spirit thereof.

As detailed above, according to the mold making machine of the present invention,
The pedestal that supports the blow plate has a protruding rod that is inserted into the hole of the nozzle provided in the blow plate, so when the blow plate is removed from the blow head, the molding sand inside the nozzle of the blow plate is ensured. In addition, the tip of the protruding rod that is removed efficiently and inserted into the hole of the nozzle coincides with the top surface of the blow plate, so the scraper can smoothly slide on the top surface of the blow plate without interfering with the protruding rod. Since it can move relatively and the molding sand on the blow plate can be scraped off,
The molding sand on the blow plate can be removed reliably and efficiently. Therefore, mold quality and molding defects caused by molding sand left behind due to forgetting or poor cleaning of multiple nozzles can be completely eliminated, and the molding sand on the blow plate can be removed by hand. It can be completely removed without any need.

[Brief explanation of drawings]

Fig. 1 is a front view showing a mold making machine according to an embodiment of the present invention, and Fig. 2 is an enlarged view (partial cross section) of the main parts in Fig. 1.
There is a diagram. FIG. 3 is an enlarged perspective view of the protruding rod of the embodiment shown in FIG. FIG. 4 shows a mold making machine according to another embodiment of the present invention. 14: Lower mold, 16: Upper mold, 30: Nozzle,
352: Plow plate, 40: Protruding rod, 42: cradle,
44: Cylinder (vertical drive device), 70: Cylinder (vertical drive device), 50: Handle (pedestal drive device), 52
: Gearbox (pedestal drive device), 62: Air nozzle,
66, 76: scraper, 68: air nozzle, 69:
Foundry sand.

Claims (1)

[Scope of Claims] 1. A blow plate is detachably provided with a nozzle that opens downward, and is positioned at a blowing position and a non-blowing position, and when in the blowing position, the nozzle is inserted into the mold. In a mold making machine having a blow head that blows foundry sand through the blow head, when the blow head is in a non-blowing position, a pedestal located below the blow plate and facing the blow plate; is provided protruding toward the nozzle at a position corresponding to the nozzle, and is formed in a thickness that can be inserted into the nozzle, so that when the blow plate is supported by the pedestal, the tip thereof is attached to the upper surface of the blow plate. A protruding rod formed at a height that exactly matches the height of the pedestal and the blow head are brought relatively close to each other so that the blow plate is supported by the pedestal, and the protruding rod is inserted into the nozzle. and a scraper device including a scraper that moves relatively along the upper surface of the blow plate while slidingly in contact with the upper surface of the blow plate when the blow plate is removed from the blow head and supported by the pedestal. The mold is characterized in that the molding sand in the nozzle of the blow plate is removed by the protruding rod at the same time when the blow plate is supported by the pedestal and removed from the blow head. Molding machine. 2. The mold making machine includes a pedestal driving device that rotates the pedestal around a horizontal axis, and when the pedestal is tilted while supporting the blow plate, the molding sand on the upper surface of the blow plate is The mold making machine according to claim 1, which is slid down. 3. The scraper according to claim 1, wherein the scraper is integrally provided with an air nozzle that is directed toward the upper surface of the blow plate and blows air onto the upper surface of the blow plate with relative movement of the scraper. Mold making machine. 4. The mold making machine according to any one of claims 1 to 3, wherein the protruding rod is equipped with a plurality of air nozzles that eject air in a direction perpendicular to the longitudinal direction of the protruding rod. .