JPS635847A - Metallic mold changing device for molding machine - Google Patents

Abstract

PURPOSE:To exactly carry out and carry in a metallic mold, and to reduce an installation space by providing a secondary lifter for bringing the metallic mold to an ascending/descending movement from the uppermost ascending position to a metallic mold supporting position, on a lifter base of a lifter. CONSTITUTION:In case of changing a metallic mold 4, the metallic mold 4 in a molding station A is moved to a stage switching station B by a metallic mold running cylinder 36, and the metallic mold 4 is detached from the cylinder 36. Subsequently, a lifter base 33 of a lifter 32 to the station B is made to ascend, and also, a secondary lifter 34 is made to ascend in the uppermost ascending position, and the metallic mold 4 is placed onto a supporting roller 27 of its upper part. Thereafter, a movable part 8b of a metallic mold running rail 8 of this stage switching station B is brought to an open movement to a withdrawing position by an operation of a retreating cylinder 30, the lifter base 33 of the lifter 32 and the secondary lifter 34 are made to descend, and the metallic mold 4 which has been used is carried out to the lower story, and stored.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mold changing device in a mold making machine that uses a metal mold to mold a mold such as a shell mold.

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

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

(Problems to be Solved by the Invention) However, if the mold is changed by moving the mold laterally within the same plane as the mold-making machine as described above, especially when molding many types of molds, Another problem is that a large installation space is required for rails for mold exchange, transport means, mold storage equipment, etc.

In order to solve the above problem, in the present invention, the mold is carried into and out of the working station of the molding machine from below to make effective use of the installation space. It is necessary to dispose a lower working unit such as an eject mechanism or a gushing mechanism below the mold, and it is required that the relationship with these mechanisms be compactly installed.

In particular, a lifter for transporting the mold downwards is installed below the work station, and the lower work unit is evacuated to avoid interference between the transport of the mold by the lifter and the lower work unit. When installed movably, the fixed guide rail of the lifter cannot be installed at a height corresponding to the mold support position of the work station due to the relationship between the lifter and the moving mechanism of the lower work unit. ,
There is a possibility that it will be difficult to obtain the reliable lifting and lowering function of the mold by the lifter. That is, since the mold described above is heavy, in the mold lifting mechanism using a lifter, it is necessary to reliably guide the lifter stand to move it up and down.

Therefore, in view of the above circumstances, the present invention aims to reduce the installation space by securing the installation space for the lower work units such as the eject mechanism and the gutting mechanism, and also by ensuring that the mold can be carried in and out downward. The object of the present invention is to provide a mold changing device for a mold making machine.

(Means for Solving the Problems) The mold changing device of the present invention is provided with a lower working unit movably provided below a mold supporting position in a working station of a mold making machine that molds a mold using a mold. Further, a passage port is provided below the work station, and a lifter for moving the mold up and down is provided below the passage port, and the mold is supported on the lifter stand of the lifter from the highest position by the lifter. The present invention is characterized in that a secondary lifter that moves up and down is installed at a position, and the secondary lifter lifts and lowers the mold at a height corresponding to the lower working unit.

(Function) In the mold changing device of the present invention as described above, when the molding machine is in the molding state, the lower working unit is positioned below the mold to perform predetermined operations such as ejecting and gutsing. . - On the other hand, when replacing a mold, when the mold is moved up and down to the mold support position by a 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 moves up and down from the lower corner to the vicinity of the passage opening, and from the highest position of the lifter near the passage opening to the height of the predetermined mold support position corresponding to the height of the lower work unit, the lifter It is moved up and down by a secondary lifter installed on the platform. Therefore, the lower work unit, which is disposed so as to be retractable below the mold support position, does not interfere with the guide rail of the lifter, and the lower work unit can perform the prescribed work. ,
The lifter is securely supported and can perform stable lifting and lowering operations.
The three-dimensional installation makes it possible to reduce the installation space.

(Example) The present invention will be described in detail 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 thereof.

The main body of the mold making machine 1, ie, the station for performing molding work, is installed at the upper corner above the intermediate floor 2.

In this mold Ia1, two work stations, a molding station A and a changeover station B, are arranged side by side on a base frame 3 erected on an intermediate floor 2.

In the molding station A, a blow tank 5 for blow-filling molding sand into the mold 4 is installed at the upper part, and this blow tank 5 has an elevating mechanism (not shown) relative to the base frame 3.
The blow head 6 is provided so as to be able to be pressed onto the upper surface of the mold 4.

Below the blow tank 5, a mold running rail 8 is horizontally installed which allows the mold 4 to move horizontally between stations A and 3 when the mold 4 is supported at a predetermined support position during molding work. ing.

A part of the movable part 8a of the mold running rail 8 is movably provided to retracted positions on both sides. That is, the movable portion 8a is connected to a rod of a retraction cylinder 9, and moves across the guide plate 10 to open to the retraction position, and the retraction cylinder 9 is also fixed onto the guide plate 10.

Furthermore, below the mold running rail 8 and between the intermediate floor 2 and the intermediate floor 2, an eject plate 12 is provided as a lower work unit 11 so as to be vertically movable. That is, the guide rod 13 of the eject plate 12 is slidably supported by the slide frame 14, and the O-rad tip of an eject cylinder 15 attached to the slide frame 14 is connected to the center of the lower surface of the eject plate 12. The extension action presses an eject bin (not shown) disposed at the bottom of the mold 4 to obtain an ejecting action to eject the mold from the mold 4. The slide frame 14 has a lateral running width 16 of a rail 17.
The slide frame 14 is placed on top of the slide frame 14 so as to be movable to a retracted position outside the base frame 3, and the rod end of a frame traveling cylinder 18 is connected to the slide frame 14 to be moved between the working position and the retracted position.

Roughly speaking, a passage opening 20 is provided in the intermediate floor 2 below the mold running rail 8. A lifter 21 that moves up and down from the passage port 20 is installed at the lower corner. This lifter 21 is provided with a lifter stand 23 that is movable up and down along a guide rail 22 extending downward from the intermediate floor 2, and this lifter stand 23 is provided with rollers 24 on the side and is guided by the guide rail 22. move up and down. A secondary lifter 25 is provided above the lifter stand 23. The secondary lifter 25 is provided with a support roller 27 that supports the lower part of the mold 4 via a lift link 26 on a lifter stand 23, and this lift link 26 is telescopically operated by a drive mechanism (not shown) to support the support roller. 2
7 performs the secondary elevating operation. Further, guide plates 28 are provided on both sides of the support roller 27 to guide the movement of the mold 4.
However, a stop cylinder 29 that moves in and out is provided at the front end to restrict the movement of the mold 4 on the support roller 27 and prevent it from falling.

On the other hand, at the changeover station B, a mold running rail 8 continuous from the molding station A is installed in the horizontal direction, allowing the mold 4 to be moved laterally between the stations.

Similar to the movable part 8a of the molding station A, a part of the movable part 8b of the mold traveling rail 8 is connected to the evacuation cylinder 3.
It is evacuated by 0. Furthermore, a passage opening 31 is also opened on the intermediate floor 2 below the mold running rail 8 of this stage change station B. A secondary lifter 34 is connected to a lifter 32 and a lifter stand 33 configured in the same manner as the lifter 21 and secondary lifter 25 for the molding station A to the passage port 31 for this stage change station B. There is. That is, the lifter 32 is provided with a lifter stand 33 that can be moved up and down along the guide rail 22 extending in the vertical direction, and the lifter stand 33 is connected to the support row 52 via the lift link 26 on the upper part.
7 is arranged to constitute a secondary lifter 34.

The mold 4 has wheels 35 at the lower part and is provided so as to be able to run on a mold running rail 8. The mold 4 is movable to open and close, and the upper mold 4a is clamped to the blow tank 5. It is possible to operate the lift.

Further, the rod end of a mold traveling cylinder 36 is connected to the side surface of the mold 4, and the extending and contracting operation of the mold traveling cylinder 36 causes the mold traveling rail 8 to be moved between the molding station A and the changeover station B. It is traveled 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 21 for the molding station A is used exclusively for lifting the mold 4 and transporting the mold, while the lifter 32 for the changing station B is used exclusively for transporting the mold by lowering the mold 4, Efforts are being made to improve the efficiency of mold replacement.

To explain the operation of the above embodiment, the mold making operation is carried out by lowering the blow tank 5 with respect to the mold 4 installed in the molding station A, press-bonding the blow head 6 to the mold 4, and forming a thermosetting material. Shell sand is blow-supplied into the mold 4 to fill it, and the filled shell sand hardens after a predetermined period of time due to the heat generated by the temperature rise of the mold 4. After curing, the blow tank 5 is raised to open the upper mold 4a, and the eject cylinder 15 of the lower work unit 11 located below the mold 4 is activated to raise the eject plate 12 to open the mold 4. The eject bin is operated to take out the formed mold from the mold 4.

By repeating the above operations, molds are sequentially formed.

- On the other hand, when replacing the mold 4, the mold 4 in the molding station A is moved to the changeover station B by the operation of the mold travel cylinder 36, and the mold 4 is removed from the mold travel cylinder 36. Separate.

Then, the lifter stand 33 of the lifter 32 relative to the stage change station B is raised, and the secondary lifter 34 is roughly raised at the highest position, and the mold 4 is placed on the support roller 27 above it.

After that, the mold traveling rail 8 of this changeover station B
The movable part 8b is moved open to the retreat position by the operation of the escape cylinder 30, the lifter stand 33 of the lifter 32 and the secondary lifter 34 are moved downward, and the mold 4 after use is carried out to the lower floor and stored.

To carry in the mold 4 to be used next, the lifter stand 23 of the lifter 21 to the molding station A is lowered, the mold 4 is placed on its support roller 27, and then the lifter stand 23 is moved up. The secondary lifter 25 is further raised from the highest position of the lifter 21. At this time, the eject plate 12 of the lower work unit 11 of the molding station A is moved to the retracted position outside the base frame 3 of the slide frame 14 by the operation of the frame travel cylinder 18, and the movable part 8a of the mold travel rail 8 is moved. It is opened and moved to the retracted position by operating the retracting cylinder 9. When the mold 4 rises to the mold support position above the mold running rail 8, the movable part 8a of the mold running rail 8 is returned to the continuous state, the lifter stand 23 is lowered, and the wheels 35 of the mold 4 are moved upward. is placed on the mold running rail 8 (movable part).

Thereafter, the mold traveling cylinder 36 is connected to the mold 4, and the lifter 21 and the secondary lifter 25 are lowered to place the mold 4 to be carried in for the next mold exchange.

Note that the blow head 6 is also replaced together with the mold 4, and the blow head 6 is removed from the blow tank 5 and placed on the mold 4 when being carried out and brought in.

In this embodiment, two lifters 21 and 32 are installed so that the mold 4 can be loaded and unloaded separately, thereby shortening the mold change time and improving the operating rate of the mold making machine. However, the mold may be carried in and out using one lifter and a secondary lifter. Furthermore, when two lifters are used, the loading and unloading positions may be reversed from 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.

The mold making machine 40 has two work stations, a blowing station C and an ejecting station D, arranged in parallel on a base frame 3 erected on an intermediate floor 2.

In the blow gassing station C, a blow tank 5 for blowing and filling molding sand into the mold 4 is installed at the upper part as in the previous example, and this blow tank 5 is moved up and down with respect to the base frame 3, and the blow head 6 is moved. The blow tank 5
A gassing unit (not shown) is provided that moves alternately with the mold 4 to introduce a reactive gas into the mold 4.

Below the blow tank 5, a mold running rail 8 is installed in the horizontal direction to allow the mold 4 to move laterally between stations, as in the previous example. A part of the movable part 8a of the mold running rail 8 is provided so as to be retractable to both sides by an evacuation cylinder 9.

Further, below the mold running rail 8 and between the intermediate floor 2 and the intermediate floor 2, a gushing plate 42 is provided as a lower work unit 41 so as to be vertically movable. That is, the guide rod 43 of the gashing plate 42 is slidably supported by the slide frame 14 similar to the previous example, and at the center of the lower surface of the gashing plate 42 is a rod of a gashing cylinder 44 attached to the slide frame 14. The tip is connected, and the gashing plate 42 is brought into pressure contact with the bottom of the mold 4 by its extension operation, thereby recovering the reaction gas introduced into the mold 4. As in the previous example, the slide frame 14 has side running wheels 16 R on rails 17 formed perpendicular to the mold running rails 8.
M, and is movably installed at a retracted position outside the base frame 3, and the rod tip of a frame traveling cylinder 18 is connected to this slide frame 14, and is moved between the working position and the retracted position.

Furthermore, a passage opening 20 is opened in the intermediate floor 2 below the mold running rail 8, a lifter 21 is provided as in the previous example, and a secondary lifter 2 is placed on the lipter table 23.
5 is provided.

On the other hand, at the eject station D, a mold running rail 8 that is continuous with the mold running rail 8 of the blow gassing station C is installed in the horizontal direction. A part of the movable part 8b of the mold running rail 8 is retracted by a retracting cylinder (not shown) similarly to the movable part 8a of the blow gassing station C.

Furthermore, the mold traveling rail 8 of eject station D
An eject plate 12 is provided below as a lower working unit 46 so as to be able to move up and down. That is, the guide rod 13 of the eject plate 12 is slidably supported by the slide frame 47, and the slide frame 4 is provided at the center of the lower surface of the eject plate 12.
The rod tip of an eject cylinder 15 attached to the mold 4 is connected to the eject cylinder 7, and its extension action presses an eject bin (not shown) disposed at the bottom of the mold 4 to eject the mold from the mold 4. This is what you get.

The slide frame 47 has side running wheels 48 placed on rails 49 formed parallel to the mold running rail 8, and is movably installed to a retracted position outside the base frame 3. The rod tip of the frame traveling cylinder 50 is connected to the frame traveling cylinder 50, and is moved between a working position and a retreat position.

In addition, a passage port 31 is also provided on the intermediate floor 2 below the mold running rail 8 of this eject station D. Passage port 3 for this eject station D
1, a lifter 32 having the same structure as the previous example is provided, and a secondary lifter 3 is mounted on the lifter stand 33.
4 are installed.

The rest of the structure is the same as that of the previous example, and the same structures are given the same reference numerals.

To explain the operation of the above embodiment, the mold making operation is carried out by lowering the blow tank 5 with respect to the mold 4 installed in the blow gassing station C, press-fitting the blow head 6 to the mold 4, and molding the mold. Sand is blow-supplied into the mold 4 to fill it. Thereafter, the gashing unit is crimped onto the upper surface of the mold 4, and the gashing cylinder 44 of the lower work unit 41 located below the mold 4 is activated to raise the gashing plate 42 and attach it to the mold 4. A reactive gas is introduced into the mold 4 in the pressed state to harden the filled molding sand. After curing, the gashing unit and gashing plate 42 are separated from the mold 4.

Next, the mold travel cylinder 36 is activated to move the mold 4 to the eject station D, and the eject cylinder 15 located below the mold 4 is activated to raise the eject plate 12 to eject the mold 4. activate the bin,
This is to take out the formed mold from the mold 4. By repeating the above operations, molds are sequentially formed.

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 moved to the retracted position by the movement of the slide frame 47. It is something to keep.

In this embodiment as well, the mold may be carried in and out using a single lifter and a secondary lifter provided on the lifter stand with one passage port. In that case, in a work station where a lifter is not installed, there is no need to form a part of the mold travel rail into a movable part, and there is no need to install the lower work unit so that it can be retracted.

(Effects of the Invention) According to the present invention as described above, in the molding state at the work station of the molding machine, the lower work unit is positioned below the mold and performs a predetermined operation such as ejecting or gutting at a predetermined time. It can be performed.

On the other hand, when replacing the mold, the mold is supported on the secondary lifter of the lifter stand in the lifter, and in addition to the lifting and lowering movements of the lifter, the secondary lifter can be raised and lowered to a predetermined support position of the work station, and the lifter The structure also ensures solid and reliable operation, enabling predetermined work to be carried out, and the three-dimensional installation allows for a reduction in installation space.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a mold making mold 9i equipped with a mold changing device according to the first embodiment of the present invention, Fig. 2 is a schematic right side view of the same, and Fig. 3 is a second embodiment of the present invention. FIG. 4 is a schematic front view of a mold making device equipped with a mold changing device in the example, and FIG. 4 is a schematic right side view of the same. 1.40... Mold making machine 2... Intermediate floors A to D... Work station 4... Mold 5... Blow tank 8...Mold traveling rail 8a, 8b
......Movable part 11.41.46...Lower work unit 17.47...Rail 20.
31...Passing port 18.50...Frame traveling cylinder 21.32...Lifter 22
...Guide rail 23.33...Lifter stand 25.34...Secondary lifter 27...Support roller

Claims (1)

[Claims] (1) A lower work unit is retractably provided below the mold support position in a work station of a mold making machine that produces a mold using a mold, and a passage opening is provided below the work station, A lifter for raising and lowering the mold is provided below the passage opening, and a secondary lifter is installed on the lifter stand of the lifter for raising and lowering the mold from the highest position raised by the lifter to the mold support position. Mold changing device for mold making machines.