JPH074649B2 - Mold changer for mold making machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mold exchanging device in a mold making machine that molds a mold such as a shell mold using a mold.

(Prior Art) Generally, in a mold making machine using a mold, a molding sand such as shell sand is blown into the mold, and the molding sand is cured by heat or reaction gas, and the mold after molding is molded into a mold. I'm trying to open and eject. In order to efficiently mold many types of molds, it is necessary to install a large number of molding machines and efficiently replace the molds.

Therefore, as a mold exchanging device for a conventional mold making machine, for example, as seen in Japanese Utility Model Publication No. 52-42887, a mold exchanging rail is laid in the same plane as the installation height of the molding machine, and within this plane. There is known a technique for changing the mold.

(Problems to be solved by the invention) However, as described above, when the molds are laterally moved in the same plane as the mold making machine to perform the mold exchange, particularly when various types of molding are performed. In addition, there is a problem that a wide installation space is required for the rails for carrying out the mold replacement, the carrying-in / out means, the mold storage facility, and the like.

In contrast to the above points, in the present invention, the die is carried in and out from the work station of the molding machine from below to effectively utilize the installation space. It is necessary to dispose a lower working unit such as an eject mechanism or a gassing mechanism at a position lower than the mold, and it is required to install a compact relationship with these mechanisms.

In particular, a lifter for loading and unloading the mold downward is provided below the work station, and the lower unit is retracted and moved in order to avoid the interference of the mold conveyance by the lifter and the lower working unit. When installed as much as possible, due to the relationship between the lifter and the moving mechanism of the lower working unit, the fixed guide rail of the lifter could not be installed at a height corresponding to the mold supporting position of the work station, and the lifter There is a possibility that it may be difficult to obtain a reliable raising / lowering function of the mold. That is, since the mold is heavy, it is necessary to reliably guide and lift the lifter stand in the lift mechanism of the lifter.

Therefore, in view of the above circumstances, the present invention secures an installation space for a lower working unit such as an eject mechanism and a gassing mechanism, and also makes it possible to reliably carry the mold in and out to reduce the installation space. It is an object of the present invention to provide a mold exchanging device for the mold making machine.

(Means for Solving the Problems) In the mold exchanging device of the present invention, a lower working unit is removably provided below a mold supporting position in a work station of a mold molding machine for molding a mold by a mold. Further, a passage opening is provided below the work station, a lifter for moving the die up and down is provided below the passage opening, and the die is supported on the lifter base of the lifter from the highest position by the lifter. It is characterized in that a secondary lifter that moves up and down to a position is installed, and the mold is moved up and down at a height corresponding to the lower working unit by this secondary lifter.

(Operation) In the mold exchanging device of the present invention as described above, in the molding state by the molding machine, the lower working unit is positioned below the mold to perform predetermined works such as ejecting and gassing. . On the other hand, when exchanging the mold up and down to the mold supporting position by the lifter through the passage opening opened below the work station of the molding machine, the mold is supported on the secondary lifter of the lifter stand, The lifter is moved up and down from the lower floor to the vicinity of the passage, and the lifter base is moved from the highest position of the lifter near the passage to the height of the predetermined mold supporting position corresponding to the height of the lower working unit. It is moved up and down by the secondary lifter installed at. Therefore, it is possible to perform the predetermined work of the lower working unit without the guide rails of the lifter and the like interfering with the lower working unit that is arranged so as to be retractable below the die supporting position. The lifter is securely supported and can be stably moved up and down, and the installation space can be reduced by the three-dimensional installation.

(Examples) Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view of the first embodiment, and FIG. 2 is a right side view of the same.

The main body of the mold making machine 1, that is, the station for performing the molding work is installed on the upper floor above the intermediate floor 2.
In this mold making machine 1, two work stations, a molding station A and a stage changing station B, are arranged side by side on a base frame 3 standing upright on an intermediate floor 2.

In the molding station A, a blow tank 5 for blow-filling the molding sand with the molding sand is installed in the upper part, and the blow tank 5 is an elevating mechanism (not shown) with respect to the base frame 3.
And a blow head 6 is provided on the upper surface of the mold 4 so that the blow head 6 can be pressed.

Below the blow tank 5, a mold traveling rail 8 is installed horizontally for supporting the mold 4 at a predetermined supporting position in a molding operation and allowing the mold 4 to traverse between stations A and B. ing. A part of the movable portion 8a of the mold traveling rail 8 is movably provided at the retracted positions on both sides. That is, the movable portion 8a is connected to the rod of the retracting cylinder 9 and traverses the guide plate 10 to open to the retracted position. The retracting cylinder 9 is also fixed on the guide plate 10.

An eject plate serving as a lower working unit 11 is provided below the mold traveling rail 8 and between the intermediate floor 2.
12 is provided to operate up and down. That is, in the eject plate 12, the guide rod 13 is slidably supported by the slide frame 14, and the eject plate 12
The rod tip of an eject cylinder 15 attached to the slide frame 14 is connected to the center of the lower surface of the mold, and its extending operation pushes an eject pin (not shown) arranged at the bottom of the mold 4 to press the mold. 4 to obtain an ejecting action for taking out the molding template. Above slide frame
The side running wheels 16 are placed on rails 17 and are movably installed at a retracted position outside the base frame 3, and a rod tip of a frame running cylinder 18 is connected to the slide frame 14 for work. It is moved to the position and the retracted position.

Further, a passage opening 20 is opened on the intermediate floor 2 below the mold traveling rail 8. A lifter 21 that moves up and down from the passage 20 to the lower floor is installed. This lifter 21 is a guide rail extending downward from the intermediate floor 2.
A lifter base 23 is arranged so as to be able to move up and down along 22. The lifter base 23 is provided with rollers 24 on its side and guided by guide rails 22 to move up and down. A secondary lifter 25 is provided on the lifter table 23. In the secondary lifter 25, a support roller 27 that supports the lower portion of the mold 4 via a lift link 26 is installed on a lifter base 23, and the lift link 26 is expanded and contracted by a drive mechanism (not shown) to support roller 27. The secondary lifting operation is performed.
Guide plates 28 for guiding the movement of the mold 4 are provided on both sides of the support roller 27, and stop cylinders 29 for retracting the front and rear are provided to restrict the movement of the mold 4 on the support roller 27 to prevent falling. It is provided.

On the other hand, in the stage changing station B, a mold traveling rail 8 continuous from the molding station A is installed in the horizontal direction so that the mold 4 can be traversed between the stations.
Like the movable part 8a of the molding station A, a part of the movable part 8b of the mold traveling rail 8 is retracted by the retracting cylinder 30. Further, the passage opening is also provided in the intermediate floor 2 below the mold traveling rail 8 of the stage changing station B.
31 has been opened. A secondary lifter 34 is installed on a lifter 32 and a lifter base 33, which are configured similarly to the lifter 21 and the secondary lifter 25 for the molding station A, also for the passage port 31 for the stage changing station B. That is, the lifter 32 is provided with a lifter base 33 that can move up and down along a vertically extending guide rail 22, and the lifter base 33 is provided with a support roller 27 via a lift link 26 at the upper part thereof, and a secondary lifter. 34 are configured.

The mold 4 has wheels 35 at the bottom, and the mold running rail 8
The mold 4 is provided so as to be capable of traveling above, and the mold 4 is provided as a movable open / close mold, and the upper mold 4a is clamped by the blow tank 5 and can be moved upward. Further, the rod tip of a mold traveling cylinder 36 is connected to the side surface of the mold 4, and the mold traveling cylinder 36 expands and contracts to form a molding station A and a stage changing station B on the mold traveling rail 8. Is moved between. The mold traveling cylinder 36 is installed on an auxiliary frame 3a provided on the side of the base frame 3.

In the above structure, the lifter 12 for the molding station A is used exclusively for loading the mold by raising the mold 4, while the lifter 32 for the stage changing station B is used for the mold 4.
It is used exclusively for unloading dies to improve the efficiency of die replacement.

Explaining the operation of the above-mentioned embodiment, in the molding process of the mold, the blow tank 5 is moved downward with respect to the mold 4 installed in the molding station A, and the blow head 6 is pressure-bonded to the mold 4 so that the thermosetting property is improved. The shell sand is blow-fed into the mold 4 to be filled therein, and the shell sand filled with the heat generated by the temperature rise of the mold 4 is hardened after a predetermined time elapses. After curing, the blow tank 5 is moved upward to open the upper mold 4a, and the eject cylinder of the lower working unit 11 located below the mold 4.
15 is operated to raise the eject plate 12 and the mold 4
The eject pin is operated to take out the molded mold from the mold 4. By repeating the above-mentioned operation, the molding of the mold is sequentially performed.

On the other hand, when the mold 4 is replaced, the mold 4 in the molding station A is moved to the stage changing station B by the operation of the mold traveling cylinder 36,
Separate the mold 4 from 36. And the changeover station B
The lifter base 33 of the lifter 32 is moved upward, and the secondary lifter 34 is further moved up at the highest position,
The mold 4 is placed on the support roller 27 above it. After that, the movable part 8b of the mold traveling rail 8 of the stage changing station B is opened and moved to the retracted position by the operation of the retracting cylinder 30, and the lifter stand 33 of the lifter 32 and the secondary lifter are moved.
34 is moved down and the used mold 4 is carried out to the lower floor and stored.

To carry in the mold 4 to be used next, the lifter base 23 of the lifter 21 with respect to the molding station A is lowered, the mold 4 is placed on the support roller 27 thereof, and then the lifter base 23 is raised. The secondary lifter 25 is further raised from the highest position of the lifter 21. At that time, molding station A
The eject plate 12 of the lower working unit 11 is moved to the retracted position outside the base frame 3 of the slide frame 14 by the operation of the frame traveling cylinder 18, and
The movable portion 8a of the mold traveling rail 8 is opened and moved to the retracted position by the operation of the retracting cylinder 9. When the mold 4 rises to the mold supporting position above the mold running rail 8, the movable part 8a of the mold running rail 8 is returned to the continuous state, and the lifter base 23 is lowered to operate the wheels 35 of the mold 4. Is placed on the mold traveling rail 8 (movable part). After that, the mold traveling cylinder 36 is connected to the mold 4, and the lifter 21 and the secondary lifter are connected.
25 is lowered and the die 4 to be carried in at the time of the next die exchange is placed. Although the blow head 6 is also replaced with the mold 4, the blow head 6 is removed from the blow tank 5 and carried out and carried in while being placed on the mold 4.

In this embodiment, two lifters 21 and 32 are installed so that the mold 4 can be loaded and unloaded separately, and the mold replacement time can be shortened to improve the mobility of the mold making machine. However, the mold may be carried in and out by one lifter and a secondary lifter. Also, 2
When two lifters are used, the carry-in and carry-out positions may be opposite to those in the above embodiment.

3 and 4 show a second embodiment. This embodiment is an example of a cold box type mold making machine.

In the mold making machine 40, two work stations, a blow-gassing station C and an eject station D, are arranged side by side on a base frame 3 erected on the intermediate floor 2.

In the blow gassing station C, a blow tank 5 for blow-filling a molding sand with a mold sand 4 is installed in the same manner as in the previous example, the blow tank 5 is moved up and down with respect to the base frame 3, and the blow head 6 is The blow tank 5 is provided on the upper surface of the mold 4 so that it can be crimped.
A gassing unit (not shown) for moving the gas and introducing the reaction gas into the mold 4 is provided.

Below the blow tank 5, as in the previous example, a mold traveling rail 8 that allows the mold 4 to traverse between stations is installed horizontally. A part of the movable portion 8a of the mold traveling rail 8 is provided by a retracting cylinder 9 so as to be retractable on both sides.

A lower working unit 41, a gassing plate 42, is provided below the mold traveling rail 8 and between the intermediate floor 2.
Are provided to operate up and down. That is, in the gassing plate 42, the guide rod 43 is slidably supported by the slide frame 14 similar to the previous example, and at the center of the lower surface of the gassing plate 42, the rod tip of the gassing cylinder 44 attached to the slide frame 14 is attached. Is connected,
By the extension operation, the gassing plate 42 is brought into pressure contact with the bottom of the mold 4 to recover the reaction gas introduced into the mold 4. Similar to the previous example, the slide frame 14 has lateral traveling wheels 16 placed on a rail 17 formed in a direction orthogonal to the mold traveling rail 8 and movably installed at a retracted position outside the base frame 3, This slide frame
A rod tip of a frame traveling cylinder 18 is connected to the frame 14, and is moved to a working position and a retracted position.

Further, a passage opening 20 is opened on the intermediate floor 2 below the mold traveling rail 8, a lifter 21 is provided as in the previous example, and a secondary lifter 25 is provided on a lifter stand 23.

On the other hand, in the eject station D, a mold traveling rail 8 which is continuous with the mold traveling rail 8 of the blow gassing station C is horizontally installed. Similar to the movable portion 8a of the blow gassing station C, a movable portion 8b of a part of the mold traveling rail 8 is retracted by a retracting cylinder (not shown).

Further, the mold running rail 8 of the eject station D
The eject plate 12 is provided as a lower working unit 46 so as to operate up and down. That is, in the eject plate 12, the guide rod 13 is slidably supported by the slide frame 47, the rod tip of the eject cylinder 15 attached to the slide frame 47 is connected to the center of the lower surface of the eject plate 12, and its extension. By the operation, the ejecting pin (not shown) arranged on the bottom of the mold 4 is pressed to obtain an ejecting action of taking out the molding mold from the mold 4. The slide frame 47 is mounted on a rail 49 having lateral traveling wheels 48 formed in parallel with the mold traveling rail 8 and movably installed at a retracted position outside the base frame 3. The tip of the rod of the frame traveling cylinder 50 is connected to and is moved to the working position and the retracted position.

Further, a passage opening 31 is also provided in the intermediate floor 2 below the mold traveling rail 8 of the eject station D. A lifter 32 having the same structure as that of the previous example is provided also for the passage port 31 for the eject station D, and a secondary lifter 34 is installed on the lifter stand 33.

Others are configured similarly to the previous example, and the same structures are denoted by the same reference numerals.

Explaining the operation of the above-described embodiment, in the mold making operation, the blow tank 5 is moved down with respect to the mold 4 installed in the blow gassing station C, and the blow head 6 is pressure-bonded to the mold 4 for casting. The sand is blown into the mold 4 to fill it. After that, the gassing unit is pressure-bonded to the upper surface of the die 4, and the gassing cylinder 44 of the lower working unit 41 located below the die 4 is operated to raise the gassing plate 42 to move the die 4 to the die 4. A reaction gas is introduced into the mold 4 in a pressure-bonded state to cure the filled molding sand.
Gassing unit and gassing plate after curing
Separate 42 from mold 4. Next, the die traveling cylinder 36 is operated to move the die 4 to the eject station D, and the eject cylinder 15 located below the die 4 is operated to raise the eject plate 12 to eject the die 4. The pins are operated to take out the molded mold from the mold 4. By repeating the above-mentioned operation, the molding of the mold is sequentially performed.

On the other hand, the operation when replacing the mold 4 is almost the same as the previous example, but when lowering the mold 4 from the eject station D, the eject plate 12 is slid on the frame.
It is moved to the retreat position by moving 47.

In this embodiment as well, the mold may be carried in and out by using a single lifter and a secondary lifter provided on the lifter base. In that case, in the work station where the lifter is not installed, it is not necessary to form a part of the mold traveling rail in the movable part, and it is not necessary to install the lower work unit so that it can be retracted.

(Effect of the Invention) According to the present invention as described above, in the molding state in the molding machine work station, the lower working unit is positioned below the mold, and predetermined work such as eject or gassing is performed at a predetermined time. It can be carried out.

On the other hand, at the time of exchanging the mold, the mold is supported on the secondary lifter of the lifter base in the lifter, and in addition to the lifting operation of the lifter, the secondary lifter can be moved up and down to a predetermined supporting position of the work station. The structure of can also obtain a firm and reliable operation, and can perform a predetermined work, and the installation space can be reduced by the three-dimensional installation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view of a mold making apparatus provided with a mold exchanging device according to a first embodiment of the present invention, FIG. 2 is a schematic right side view of the same, and FIG. FIG. 4 is a schematic front view of a mold making apparatus provided with a mold exchanging device according to a second embodiment of the invention, and FIG. 4 is a schematic right side view of the same. 1,40 …… Mold molding machine, 2 …… Intermediate floor A to D …… Work station 4 …… Mold, 5 …… Blow tank 8 …… Mold running rail, 8a, 8b …… Movable part 11,41 , 46 …… Lower work unit 17,47 …… Rail, 20,31 …… Passage 18,50 …… Frame traveling cylinder 21,32 …… Lifter, 22 …… Guide rail 23,33 …… Lifter stand 25 , 34 …… Secondary lifter 27 …… Support roller 36 …… Mold running cylinder

Claims (1)

[Claims] 1. A lower working unit is removably provided below a mold supporting position in a work station of a mold making machine for molding a mold with a mold, and a passage opening is provided below the work station. A lifter for moving the mold up and down is provided below the passage opening, and a secondary lifter for moving the mold up and down from the highest position by the lifter to the mold supporting position is installed on the lifter base of the lifter. Mold changer for mold making machine.