JP3110617B2 - Sand molding method and apparatus therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method and an apparatus for molding a sand mold (mold or core) by firing molding sand.

[0002]

2. Description of the Related Art A conventional molding machine related to this is actually disclosed in Shokai 6
It is described in 3-47047. The molding machine is provided with a set of molding dies and a set of molding sand blowing mechanism, and the like, in which mold clamping, molding sand blowing, firing of molding sand, mold opening, and removal of a sand mold are sequentially performed.

[0003]

However, since the above-mentioned conventional molding machine has only one set of molding dies, the molding of the next sand mold cannot be started until one sand mold is completed. For this reason, if the cycle time is to be shortened, it is necessary to increase the number of the molding machines, which increases the equipment cost and the equipment space. In addition, if the types of sand molds to be molded increase, the mold must be changed frequently, so that the time for the mold change is increased and the cycle time is further increased. The technical problem of the present invention is to make it possible to equip one molding machine with a plurality of molding dies, and to perform sintering or the like with another molding die while blowing molding sand into one molding die. By doing so
It is intended to shorten the cycle time and to reduce the time required for the type change by reducing the frequency of the type change.

[0004]

The above-mentioned problems are solved by a sand molding method and a sand molding method having the following features. The invention of claim 1 is a sand molding method for molding a sand mold by injecting molding sand into a molding die by a molding sand injection mechanism and firing the molding sand, wherein the molding sand is blown by an upper mold fixing device. Raising and lowering the lower mold by an elevating mechanism with respect to the upper mold of one molding die supported at a position, and blowing molding sand into the one molding die; and fixing the upper mold to the upper mold fixing device. And removing the one mold by the elevating mechanism, then traversing the one mold to the firing position by the mold moving mechanism to fire the molding sand, and another step at another firing position. The molding die is traversed to the position of the elevating mechanism by the die moving mechanism, the another molding die is raised by the elevating mechanism, and the upper die is attached to the upper die fixing device, and the lower die of the another molding die is lowered. Is lowered by the lifting mechanism And removing the sand mold, and while the molding sand of the one mold is being fired, the lower mold is moved to the upper mold of the another mold supported by the upper mold fixing device. Raising the mold by the elevating mechanism, clamping the mold, and blowing molding sand into the other mold. According to the present invention, while the molding sand of one molding die is being fired at the firing position, another molding die that has been fired at another firing position is traversed to the position of the lifting mechanism, and the mold is opened.
After removing the sand mold, the molding die can be clamped to blow molding sand. For this reason, the cycle time can be shortened as compared with the conventional method in which the molding of one sand mold is completed and the molding of the next sand mold is started. Also, the operation rate of the equipment is improved. Furthermore, if one mold and another mold are composed of different types of molds, the frequency of mold change is reduced and the time required for mold change is reduced. As described above, the cycle time of the sand mold can be shortened, and the operation rate of the equipment is improved, so that the cost of manufacturing the sand mold can be reduced.

[0005] A second aspect of the present invention is a sand molding apparatus for molding a sand mold by blowing molding sand into a molding die by a molding sand blowing mechanism and firing the molding sand. A plurality of forming dies, and a mechanism for connecting the upper die, an upper die fixing device for supporting the upper die at a casting sand blowing position, and the upper die connected to the upper die fixing device The lower mold is raised, the mold is clamped at the casting sand blowing position, and the mold is opened by lowering the lower mold with respect to the upper mold. An elevating mechanism that elevates the molding die in a state where the connection between the upper die and the upper die fixing device is released,
A plurality of firing positions, which are arranged below the casting sand blowing position and in the lateral direction of the elevating mechanism and in which the molding die is arranged when firing the casting sand, and between the position of the elevating mechanism. And a mold moving mechanism for traversing the molding die. According to the present invention, the sand molding method according to claim 1 can be performed.

According to a third aspect of the present invention, there is provided the sand mold forming apparatus according to the second aspect, wherein the molding die is set on the mold moving mechanism and the elevating mechanism while being fixed to a uniform moving base. Features. According to the present invention, since the molding dies are fixed to the unified moving gantry, it is possible to cope with a plurality of types of molding dies with one type of mold moving mechanism and lifting mechanism.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sand molding method and an apparatus according to one embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a front view of the sand molding apparatus according to the present embodiment, and is a view taken in the direction of arrow II in FIG. 3, FIG. 2 is a view in the direction of arrow II-II in FIG. 3, and FIG. It is a side view of such a sand molding device. 4 to 14 are schematic diagrams illustrating a sand molding method according to the present embodiment. The sand mold forming apparatus 10 is a machine for forming a core (hereinafter, referred to as a sand mold x) of a cast product such as a cylinder head and an intake manifold, and is a mold (A-type, B type)
Can be attached. Here, the width direction (horizontal direction in FIG. 1) of the sand mold forming apparatus 10 is defined as the X-axis direction, the front-rear direction (vertical direction in FIG. 1) as the Y-axis direction, and the height direction as the Z-axis direction. Do. As shown in FIGS. 2 and 3, the sand mold forming apparatus 10 includes a base base 12 at the lower center thereof, and a mold elevating cylinder 13 is vertically fixed to the base base 12.

Further, the lower die A of the dies A and B is provided on the upper end of the piston rod 13p of the die lifting cylinder 13.
2, a lower die fixing device 16 for fixing B2 is attached. Here, on the lower surface of the lower die fixing device 16, lift guide rods 15 are fixed at four corners in parallel with the mold lift cylinder 13, and these lift guide rods 15 are fixed at the four corners of the base 12. It is inserted through the body 14. With this structure, when the mold elevating cylinder 13 operates, the elevating guide rod 15 is guided by the cylinder 14 and slides in the cylinder 14, and the lower mold fixing device 16 moves up and down while being held horizontally. .

The lower die fixing device 16 is provided at the center thereof with an extrusion cylinder 16y coaxially with the die lifting cylinder 13, and an extrusion plate 16b is fixed to the upper end of a piston rod 16p of the extrusion cylinder 16y. ing. The extruded plate 16b includes an extruded pin board 20a, which will be described later.
This is a flat plate for pushing up 20b, and as shown in FIG. 3, a pair of guide rods 16r is fixed to the lower surface thereof at right angles. And those guide rods 16
r is inserted through a cylindrical body 16t fixed in parallel with the extrusion cylinder 16y interposed therebetween. With this structure, when the extrusion cylinder 16y operates, the guide rod 16r is guided by the cylinder 16t and slides in the cylinder 16t, and the extrusion plate 16b moves up and down while being held horizontally. Here, as shown in FIG. 2, the lower mold A2 and the lower mold B2 are frame-shaped movable pedestals 22 each having a uniform outer shape.
a, 22b, and the movable gantry 22
Extrusion pin boards 20a and 20b each having a product extrusion pin (not shown) are housed in the hollow portions a and 22b so as to be vertically displaceable. Since the structures of the moving frame 22a and the extrusion pin board 20a of the mold A are the same as the structures of the moving frame 22b and the extrusion pin board 20b of the mold B, hereinafter, the mold A and the moving Stand 2
Each component structure will be described based on 2a and the extrusion pin board 20a.

As shown in FIG. 2, a connecting mechanism 17 for connecting the pushing plate 16b to the pushing pin board 20a is attached to the pushing plate 16b. The connecting mechanism 17 includes a pair of hooks 17f for hooking the push-pin board 20a, and a connecting cylinder 17y for rotating the hooks 17f within a predetermined range. Then, the hook 17f is rotated in the hooking direction by the connecting cylinder 17y in a state where the board 20a for pushing pins is overlapped on the pushing board 16b, so that the board 20a for pushing pins is connected to the pushing board 16b. You. When the movable frame 22a of the mold A is placed at a predetermined position on the lower mold fixing device 16, the push pin board 20a is automatically stacked on the push plate 16b.

Also, at the four corners of the lower die fixing device 16, FIG.
As shown in FIG. 1, a lower mold fastener 18 for fixing the movable base 22a of the mold A to the lower mold fixing device 16 is attached. The lower mold clamp 18 includes a bolt-shaped hook 18k and a tightening cylinder 18y for rotating the hook 18k around the end.
The movable frame 22a is fixed to the lower mold fixing device 16 by rotating the hook body 18k from the outer side until the hook 18k is fitted to the movable frame 22a. As a result, the lower mold A2 of the mold A is firmly attached to the lower mold fixing device 16 via the movable base 22a.

Further, as shown in FIGS. 1 and 3, at the both sides of the lower die fixing device 16 in the Y-axis direction, that is, at positions where the lower die fixing device 16 is sandwiched from the front and rear, an elevating roller having an elevating device is provided. A conveyor 30 is provided. The elevating roller conveyor 30 is a conveyor for supporting the X-axis rail 22ar fixed to the side surface of the movable gantry 22a from below, moving the movable gantry 22a up and down within a predetermined range, and moving the movable gantry 22a in the X-axis direction, Multiple wheels 32
And a wheel elevating cylinder 33 for raising and lowering the gantry 31.

Further, as shown in FIG. 1, a first fixed conveyor 41 is provided on both sides of the elevating roller conveyor 30 in the X-axis direction on an extension of the elevating roller conveyor 30.
And a second fixed conveyor 42. The first fixed conveyor 41 and the second fixed conveyor 42 have the same structure, and include a pair of mounts 41k, 42k and the mounts 41k, 42k.
A plurality of wheels 41t, 4 mounted horizontally side by side on 42k
2t. And those wheels 41
The heights of t and 42t are set to be equal to the height of the wheels 32 of the lifting roller conveyor 30 at the upper limit position. That is, when the lifting roller conveyor 30 is at the upper limit position, the moving platform 2 on the lifting roller conveyor 30
2a can traverse to the positions of the first fixed conveyor 41 and the second fixed conveyor 42.

As shown in FIGS. 1 and 2, a mold A is provided between a pair of pedestals 41k of the first fixed conveyor 41.
A first retraction mechanism 51 for moving the moving gantry 22a between the elevating roller conveyor 30 and the first fixed conveyor 41 is provided. The first retraction mechanism 51 includes:
It comprises a hook 51f that engages from above with the movable gantry 22a lifted to the upper limit position by the lifting roller conveyor 30, and a traversing mechanism 51y that moves the hook 51f in the X-axis direction. Similarly, between the pair of pedestals 42k of the second fixed conveyor 42, a second retraction mechanism 52 for moving the movable pedestal 22b of the mold B between the lifting roller conveyor 30 and the second fixed conveyor 42.
Is provided. The second retraction mechanism 52 includes a hook 52 that is engaged from above with the movable base 22b lifted to the upper limit position by the lifting roller conveyor 30.
f and a traversing mechanism 52y for moving the hook 52f in the X-axis direction.

An upper die fixing device 60 is provided directly above the lower die fixing device 16. The upper die fixing device 60 includes:
This is an apparatus for fixing the upper mold A1 or the upper mold B1, and upper mold clamps 68 are attached to four corners thereof.
The upper mold clamp 68 includes a bolt-shaped hook body 68k and a hook body 6k.
Tightening cylinder 68 for rotating 8k around the end
and the hooks 68k are fitted to the upper dies A1, B1 from outside of the upper die fixing device 60 in a state where the upper dies A1, B1 are in contact with the upper die fixing device 60. By rotating the upper molds A1 and B1, the upper molds A1 and B1 are fixed to the upper mold fixing device 66. Further, the upper die fixing device 6
A push pin board 64 provided with a product push pin 62 (see FIG. 3) and a pushing device 66 for vertically moving the push pin board 64 are mounted at the center of 0.

Further, on both sides of the upper mold fixing device 60 in the X-axis direction, a pair of blow devices 70 for blowing molding sand into the mold A or the mold B which has been clamped are provided. The blow device 70 includes a blow head 74 suspended from an X-axis rail 72 and a moving cylinder 7 for moving the blow head 74 along the X-axis rail 72.
And 6. Then, by the moving cylinder 76 operating in the direction of extending the piston rod,
An outlet 74m of the blow head 74 is connected to an inlet (not shown) of the dies A and B, so that molding sand can be blown into the dies A and B. Here, molding sand is continuously supplied to the blow head 74 from a molding sand tank 77 by a supply pipe 78. That is, the blowing device 70 corresponds to the casting sand blowing mechanism of the present invention.

Next, a sand molding method according to the present embodiment will be described with reference to FIGS. First, as shown in FIGS. 1 and 2, the upper mold A1 is attached to the upper mold fixing device 60, and the lower mold A2 is The cylinder 13 is operated, the lower mold fixing device 16 is raised, and the mold A is clamped.
When the mold A is clamped, the moving cylinders 76 of the blow device 70 provided on both sides of the upper mold fixing device 60
As shown in FIG. 5, the blowout port 74m of the blow head 74 is moved in the mold A
(Not shown). And
In this state, molding sand is blown into the mold A from the blow head 74 by compressed air.

When the blowing of the molding sand is completed after a predetermined period of time, the moving cylinder 76 of the blow device 70 operates in the direction for storing the piston rod, and the blow head 74 blows the mold A. Removed from mouth. Further, the upper mold clamps 6 provided at the four corners of the upper mold fixing device 60 are provided.
The tightening cylinder 68y of No. 8 operates in a direction to remove the hook body 68k, and the connection between the upper mold A1 and the upper mold fixing device 60 is released. Next, the mold elevating cylinder 13 operates to lower the lower mold fixing device 16, and as shown in FIG. 5, the mold A descends to the lower limit position while the mold is clamped. When the lower die fixing device 16 is lowered to the lower limit position, the connecting cylinder 17y of the lower die fixing device 16 operates in a direction to remove the hook 17f from the extrusion pin board 20a, and the pushing plate of the lower die fixing device 16 is moved. 16b and board 20a for extrusion pins
Is disconnected. Further, the lower die fixing device 16
Tightening cylinders 18 for lower mold fasteners 18 provided at the four corners
The y moves in the direction to release the hook 18k, and the connection between the movable gantry 22a for fixing the lower mold A2 and the lower mold fixing device 16 is released. Thereby, the mold A is fixed to the lower mold fixing device 1.
6 can be separated.

Next, by moving the wheel lifting cylinder 33 of the lifting roller conveyor 30 in the direction of raising the lifting roller conveyor 30, the mold A and the moving base 22a are moved by the wheels 32 via the X-axis rail 22ar. It is pushed up and rises to a height that can traverse in the direction of the first fixed conveyor 41. As a result, the hook 51f of the first retracting mechanism 51 automatically engages with the movable platform 22a, and as shown in FIG. 6, the movable platform 2 on the lifting roller conveyor 30 is moved by the first retracting mechanism 51.
The mold 2 a and the mold A are drawn to the position of the first fixed conveyor 41. Then, at this position, the molding sand in the mold A is fired. As described above, the mold elevating cylinder 13 and the like function as the elevating mechanism of the present invention, and the elevating roller conveyor 3
The first fixed conveyor 41, the second fixed conveyor 42, and the like function as the mold moving mechanism of the present invention.

Next, the mold B placed on the second fixed conveyor 42 and the movable base 22b are drawn to the position of the lifting roller conveyor 30 by the second drawing mechanism 52. Then, with the movable base 22b set at a predetermined position on the elevating roller conveyor 30, FIG.
As shown in FIG. 7, the wheel lifting cylinder 33 lowers the lifting roller conveyor 30 to the lower limit position. Thereby, the moving platform 22a on the elevating roller conveyor 30
Is transferred to the lower die fixing device 16. Next, in this state,
By operating the coupling mechanism 17 of the lower die fixing device 16, the extrusion pin board 20 b of the mold B is connected to the extrusion plate 16 b of the lower die fixing device 16, and the lower die fixing device 16
When the lower mold clamp 18 is operated,
b is fixed to the lower die fixing device 16.

Next, the mold elevating cylinder 13 was operated to move the lower mold fixing device 16, the movable base 22b and the mold B upward, and the upper mold B1 of the mold B was pressed against the upper mold fixing device 60. In this state, the operation of the mold elevating cylinder 13 stops. In this state, the upper mold clamps 6 provided at the four corners of the upper mold fixing device 60 are provided.
By operating the tightening cylinder 68y of No. 8, the upper die B1 is fixed to the upper die fixing device 60 by the hooks 68k. Further, the moving cylinder 76 of the blow device 70 operates in the direction in which the piston rod extends, and the blow head 7
The fourth outlet 74m is connected to the inlet of the mold B. Then, as shown in FIG. 8, the molding sand is blown into the mold B from the blow head 74 by the compressed air. When the predetermined time has elapsed and the casting sand has been blown in this way, the blow head 74 of the blow device 70 is separated from the blow port of the mold B, and the upper mold clamp 68 of the upper mold fixing device 60 operates. Then, the connection between the upper mold B1 and the upper mold fixing device 60 is released.

Next, the mold lifting cylinder 13 operates to lower the lower mold fixing device 16, and as shown in FIG. 9, the mold B descends to the lower limit position with the mold clamped.
Then, the connection cylinder 17y of the lower die fixing device 16 operates in a direction to remove the hook 17f from the extrusion pin board 20b, and the connection between the extrusion plate 16b of the lower die fixing device 16 and the extrusion pin board 20b is released. . Further, the lower mold fasteners 18 provided at the four corners of the lower mold fixing device 16 are operated, and the connection between the movable frame 22b for fixing the lower mold B2 and the lower mold fixing device 16 is released. Thereby, the mold B can be separated from the lower mold fixing device 16.

Next, in the process in which the wheel lifting cylinder 33 is operated and the lifting roller conveyor 30 is raised to the upper limit position, the mold B and the moving base 22b are pushed up by the lifting roller conveyor 30 via the X-axis rail 22br. The movable platform 22b is arranged at a height at which the movable platform 22b can traverse in the direction of the second fixed conveyor 42. Thereby, the hook 52f of the second retraction mechanism 52 is attached to the movable base 22b.
As shown in FIG. 10, the movable pedestal 22 b and the mold B on the elevating roller conveyor 30 are pulled to the position of the second fixed conveyor 42 by the second retraction mechanism 50. Then, at this position, the molding sand in the mold B is fired.

After the predetermined time has elapsed and the firing of the molding sand of the mold A is completed on the first fixed conveyor 41, the mold A and its movable base 22a are moved by the first retraction mechanism 51.
As a result, it is returned to the position of the lifting roller conveyor 30. Then, as shown in FIG.
When the wheel lifting cylinder 33 lowers the lifting roller conveyor 30 to the lower limit position with the 2a set at a predetermined position on the lifting roller conveyor 30, the moving platform 22a on the lifting roller conveyor 30 moves the lower die fixing device 16 Will be transferred to Next, by operating the connecting mechanism 17 of the lower mold fixing device 16, the extrusion pin board 20 a of the mold A is connected to the extruding plate 16 b of the lower mold fixing device 16, and the lower mold fixing device 16 The movable mount 22a of the mold A is fixed to the lower mold fixing device 16 by the operation of the fastener 18.

Next, the mold elevating cylinder 13 is operated to move the lower mold fixing device 16, the movable pedestal 22a and the mold A up, and as shown in FIG. The mold lifting cylinder 13 is pressed against the upper
Operation stops. Then, in this state, the tightening cylinder 68y of the upper mold clamp 68 of the upper mold fixing device 60 operates, and the upper mold A1 is fixed to the upper mold fixing device 60 by the hooks 68k. In this way, when the upper mold A1 is fixed to the upper mold fixing device 60, the lower mold fixing device 16, the movable gantry 22a and the lower mold A2 are lowered by the operation of the mold elevating cylinder 13, and Further, in synchronization with this, the extrusion device 66 of the upper die fixing device 60 operates to operate the extrusion pin board 6.
2 is displaced downward. As a result, the extrusion pin 62 pushes the sand mold x away from the upper mold A1, and the sand mold x descends while being stuck to the lower mold A2. Then, in a state where the lower die fixing device 16 is lowered to the lower limit position, the pushing cylinder 16y of the lower die fixing device 16 is moved to the piston rod 16p.
The push pin board 20a is pushed up by the push plate 16b. As a result, the extrusion pins provided on the extrusion pin board 20a are
2 and the sand mold x is pushed away from the lower mold A2. Then, as shown in FIG. 13, the sand mold x pushed away from the lower mold A2 is taken out of the mold A by an automatic take-out device (not shown) and transported to a predetermined position.

When the sand mold x is taken out of the mold A by the automatic take-out device, the mold elevating / lowering cylinder 13 is operated again to operate the lower mold fixing device 16 and the movable base 22a.
Then, the lower mold A2 is raised, and the mold A is clamped.
Then, with the mold clamping completed, the blow head 7
4 is connected to an inlet (not shown) of the mold A, and the molding sand is blown into the mold A from the blow head 74 by the compressed air, as shown in FIG. Thereafter, the above procedure is repeatedly executed, and the molding of the sand mold x is performed alternately by the mold A and the mold B.

As described above, according to the sand molding method and apparatus according to the present embodiment, the molding sand in the mold B can be fired while the molding sand is being blown into the mold A. Since 70 and the firing mechanism (not shown) are used at the same time, the operation rate of the equipment is improved. Also, the cycle time is shorter than in the conventional case. Also,
If the mold A and the mold B are composed of different types of molds, the frequency of mold change is reduced and the cycle time is further shortened.
Further, since the movable frames 22a and 22b have the same outer shape regardless of the type of the mold, one type of the lower mold fixing device 16, the lifting roller conveyor 30, the first fixed conveyor 41, and the second fixed conveyor 42 are used. It is possible to cope with various types of dies by using the method, etc., thereby reducing equipment costs.

[Brief description of the drawings]

FIG. 1 is a front view of a sand molding apparatus according to an embodiment of the present invention, and is a view as viewed in the direction of arrow II in FIG.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a side view of the sand molding apparatus according to one embodiment of the present invention.

FIG. 4 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 5 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 6 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 7 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 8 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 9 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 10 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 11 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 12 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 13 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

FIG. 14 is a schematic view illustrating a sand molding method according to an embodiment of the present invention.

[Explanation of symbols]

 A Die (Mold) A1 Upper Die (Upper) A2 Lower Die (Lower) B Die (Mold) B1 Upper Die (Upper) B2 Lower Die (Lower) 13 Elevation Cylinder (elevating mechanism) 16 Lower mold fixing device 30 Elevating roller conveyor (mold moving mechanism) 41 First fixed conveyor (mold moving mechanism) 42 Second fixed conveyor (mold moving mechanism) 60 Upper mold fixing device 70 Blow device (casting sand) Blowing mechanism)

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hidenori Nagai 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Sakashima 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Koji Sano 84, Kawazoe, Odaka-cho, Midori-ku, Nagoya-shi, Aichi Kenji Ohashi, Examiner at Toyo Industrial Machinery Co., Ltd. (56) References JP-A-3-258439 (JP, A) 138945 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22C 11/00-25/00

Claims (3)

(57) [Claims] 1. A molding sand blowing mechanism injects molding sand into a molding die and burns the molding sand.
A sand mold molding method for molding a sand mold, wherein the upper mold fixing device is supported at a casting sand blowing position.
The lower mold is raised by the lifting mechanism with respect to the upper mold of one molding die
And then inject molding sand into one of the molds.
Removing the upper mold from the upper mold fixing device and removing the one mold
Is lowered by the elevating mechanism, and then the one mold
Is traversed to the firing position by the die moving mechanism to fire the foundry sand.
And another molding die located in another firing position by the mold moving mechanism
Traverse to the position of the lifting mechanism, and the lifting mechanism
Raise another mold and place the upper mold on the upper mold fixing device.
Attach, lower the lower mold of the another mold by the lifting mechanism
Lowering the mold, opening the sand mold, and removing the sand mold, while the molding sand of the one mold is being fired,
With respect to the upper mold of the another molding die supported by the mold fixing device
The lower mold is raised by the elevating mechanism, and the mold is clamped.
Sand mold molding method characterized by having the steps of blowing molding sand into another mold. 2. A molding sand is blown into a molding die by a molding sand blowing mechanism, and the molding sand is fired.
A sand molding machine for molding sand, which has an upper mold and a lower mold.
It has a mechanism that connects the upper mold with a plurality of molds that can be
An upper mold fixing device supporting the blowing position of the upper mold and a lower mold with respect to the upper mold connected to the upper mold fixing device.
Raise the mold, and close the mold at the casting sand blowing position.
And lower the lower mold to the upper mold.
The mold is opened with the upper mold and the upper mold.
The mold is lifted in a state where the connection with the mold fixing device is released.
An elevating mechanism for lowering, and a side of the elevating mechanism below the casting sand blowing position.
The molding is performed when firing the foundry sand
A plurality of firing positions where the molds are arranged, and a position of the lifting mechanism
And a mold moving mechanism for moving the molding die between the two . 3. The sand molding apparatus according to claim 2, wherein the molding die is set to a mold moving mechanism and an elevating mechanism while being fixed to a uniform moving base. apparatus.