JPH04167965A - Apparatus for cooling mold - Google Patents

Abstract

PURPOSE:To enable casting after cooling two kinds of molds in one casting line by naturally cooling in a first cooling line and further, in a second cooling line in the case of the mold to be cooled for long time. CONSTITUTION:In the case output signal of an approaching sensor 19 shows that the mold coming to end part of a conveyor line 35 is the mold to be cooled for long time, based on control of the control computer, this carriage is positioned in the a second lifter 25 with a traverser 44. The conveyor line 35 delivers the mold on the carriage in the traverser 44 and the molds are alternately supplied to two conveyor lines 38, 39 in the second cooling line 45 and alternately delivered to the traverser 43 and further, supplied to three lines 40, 41, 42. The mold is delivered onto the carrier in the traverser 44 while naturally cooling in the air, and after descending the second lifter 25 to the first floor, the mold is delivered to the second lifter 25 with the traverser 44. By ascending the second lifter 25 to the second floor, the mold is delivered to shake-out process.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mold cooling device that carries in a poured mold, naturally cools it, and then takes it out. This invention relates to a mold cooling device.

(Prior Art) Conventionally, in a casting line that uses a mold formed by forming a sand mold inside a casting flask, the mold after pouring is placed on a cart with a surface plate, and these carts are placed in a series of predetermined positions. It is carried into the starting end of a long cooling line, is sequentially pushed and transported to the end of the cooling line while being naturally cooled in the atmosphere, and after reaching there, is carried out and supplied to the frame breaking process, There, the mold is broken down and the cast product is taken out.

(Problem to be solved by the invention) By the way, for example, cast products for automobile parts include those made of ordinary cast iron (flywheels, brake drums, etc.) and those made of ductile cast iron (knuckle steering, rear axle housing, etc.). Therefore, in order to obtain good casting quality for these cast products, the cooling time of the mold from pouring to unmolding varies depending on the material, and in the case of a mold filled with ordinary cast iron, it takes 20 to 30 minutes. However, in the case of a mold filled with ductile cast iron, it takes 40 to 60 minutes.

On the other hand, in the conventional casting line described above, the length of the cooling line is constant, and the conveyance speed of the mold therein is also constant, so the natural cooling time from pouring to melting the frame is fixed.

For this reason, conventionally, products made of ordinary cast iron and products made of ductile cast iron were produced on separate casting lines, or a casting line was set up for products made of one of the materials, and then products made of a material other than that specified for that line were produced. The quality of products made from materials other than those specified was adjusted by post-processing heat treatment.

However, in the former case, it would be necessary to install two casting lines, which would increase equipment costs, and the product conveyance equipment and sand processing equipment would have to perform post-processing for the two lines. If the production volume of each line is different, there is a problem that the load on the post-processing equipment varies, and in the latter case, there is a problem that post-processing heat treatment of the product is required, which increases production costs. Ta.

The present invention provides a mold cooling device that advantageously solves this problem.

(Means for Solving the Problems) A mold cooling device of the present invention includes a mold carrying means for carrying in a mold filled with molten metal, and a mold receiving from the mold carrying means, which is cooled in the air from a starting end to a terminal end. a first cooling line that transports the mold while cooling the mold; and a second cooling line that transports the mold from the starting end to the terminal end while cooling the mold in the air; a cooling line, and mold identification means for identifying whether the mold conveyed thereto is a short-time cooling type or a long-time cooling type and outputting a signal indicating the same at the terminal end of the first cooling line; The mold that has come to the end of the second cooling line is received and carried out, and based on the signal from the mold identification means, the mold that has come to the end of the first cooling line is recognized as a short-time cooling mold. In this case, the mold that has arrived at the end of the second cooling line is received and carried out first, and if that mold is a long-time cooling mold, it is received and transferred to the beginning of the second cooling line. It is characterized by comprising means.

(Function) In such a device, when a mold into which molten metal has been poured is brought in by the mold carrying means, the mold is conveyed through the first cooling line while being naturally cooled from the starting end to the terminal end, and the mold is passed through the mold identifying means. At the end of the first cooling line, the mold carried there identifies whether it is a short-time cooling type or a long-time cooling type and outputs a signal indicating the same, and the mold carrying-out transfer means, Based on that signal, if the mold that has arrived at the end of the first cooling line is a short-time cooling type, it is received and carried out, while if the mold is a long-time cooling type, it is received and transferred to the second cooling line. A second cooling line has a starting end and a terminal end adjacent to the terminal end of the first cooling line, and transports the mold from the starting end to the terminal end while cooling it naturally, and further The mold carrying-out transfer means receives the mold that has reached the terminal end of the second cooling line and carries it out.

Moreover, if the mold that has arrived at the end of the first cooling line is a short-time cooling mold, the mold carry-out and transfer means receives and carries out the mold with priority over the mold that has arrived at the end of the second cooling line. .

Therefore, according to the apparatus of the present invention, the mold into which the molten metal is poured is naturally cooled in the first cooling line for both the short-time cooling type and the long-time cooling type, and the mold is also cooled in a short time. In the case of a mold, it is preferentially carried out immediately after that, while in the case of a long cooling mold that requires long cooling, it can be carried out after being sufficiently naturally cooled in the second cooling line. One casting line can cast two types of molds and products made of two types of materials by cooling each one for an appropriate time.Therefore, there is no need to install two casting lines, reducing equipment costs. In addition, even if the production volumes of two types of products are different, it is possible to prevent variations in the load on the product conveyance equipment and sand processing equipment, and it is also possible to eliminate the need for post-processing heat treatment of the product, making it possible to improve the casting process. Since the product can be shipped in a released state, production costs can also be reduced.

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

Fig. 1 is a plan view showing an embodiment of the mold cooling device of the present invention applied to a casting line for casting cast products for automobile parts, and Fig. 2 shows other casting equipment of the casting line. 1 is a plan view, and the casting line here casts cast products made of two types of materials, ordinary cast iron and ductile cast iron, using a mold formed by forming a sand mold inside a casting flask.

In order to carry out such casting, this casting line is equipped with the above-mentioned other casting equipment on the second floor of the foundry, as well as the mold cooling device of this embodiment on the first floor of the foundry. As shown in the figure, two conveyor lines 1
While conveying a large number of upper mold flasks 3 and lower mold flasks 4 upward in the figure, two molding machines 5°6 are used to move the upper mold flasks 3 and 4 upward into the flasks 3 and 4. Sand molds for the mold and the lower mold are formed with the cavity recesses facing downward, and the flask 4 for the lower mold is reversed by the reversing machine 7 and then placed on a trolley 8 with a surface plate, and the core is removed from the mold at the core station 9. For the upper mold flask 3, Komei drilled a gas vent hole from above using machine 10, then reversed it using reversing machine 11 to form a sprue from below, and then reversed it again using reversing machine 12. Thereafter, a mold matching machine 13 is used to form a lower mold casting flask 4 on a trolley 8 with a surface plate.
After the mold 14 is formed by superimposing the upper mold flask 3 on top of the mold 14 as shown in FIG. 3, a traverser 15 moves the trolley on which the mold 14 can be placed together with the trolley 8 with a surface plate in the left and right directions in the figure. Accordingly, the trolley 8 with a surface plate carrying the mold 14 is fed to the conveyor line 16 on the left side in the figure, and the trolley 8 with a surface plate carrying the mold 14 is conveyed downward in the figure by the conveyor line 16. At the same time, two automatic pouring machines 1
7, the molten metal is poured into the mold 14.

Here, as shown in FIG. 3, the side surface of the lower mold flask 4 is
A maximum of eight mark pins 18 can be attached, and by attaching these mark pins 18 in different positions, each lower mold flask 4 is given a unique code and can be identified. It becomes.

Although not shown in the drawings, the upper mold flask 3 is similarly provided with a unique code by different placement of mark pins so that it can be identified.

In this casting line, for example, conveyor line 15
As shown in Fig. 4, proximity sensors 19 provided on the sides of the conveyor lines 1.2 and 15 respectively detect the placement of the marking pins 18 on the flasks 3 and 4, and the results are used in the casting process. input into the line management computer 20,
The molding machines 5, 6 and the automatic pouring machine 17 are made to identify the coat of the flasks 3, 4 to be introduced next, and the casting line management computer 20 is made to specify in advance which coat for the upper mold flask 3 and for the lower mold. The type of product to be cast in the mold 14 of which code in which the flask 4 is combined is inputted, and based on the data, the casting line management computer 20 sends information to the sand mold molding machines attached to the molding machines 5 and 6. Instructions are given to the automatic mold changing device 21 and the automatic pouring machine 17 to manage which type of sand mold should be placed in which code mold 14, and which type of sand mold should be placed in which coat mold 14. By controlling whether to pour molten metal into the material,
Each of a plurality of types of products is cast in predetermined numbers using a material corresponding to the product out of two types of materials, normal cast iron and ductile cast iron.

Furthermore, in this casting line, the mold 14 in which the molten metal is poured is lowered from the second floor of the foundry to the mold cooling device 23 of this embodiment, which will be described later, on the - floor by a first lifter 24 serving as a mold carrying means. And the mold cooling device 23
After cooling appropriately, the mold is taken up to the second floor again using the second lifter 25, which serves as a mold transfer means, and the cart 8 with the surface plate is removed by the cart removing machine 26, and then conveyed to the right in the figure by the conveyor line 27 and released. The sand mold is cut out by the frame machine 28, and the upper mold flask 3 and the lower mold flask 4 are supplied to the conveyor lines 1 and 2, respectively, while the extracted sand mold is disassembled by the mold breaker 29 to produce a cast product. is taken out, lowered to the - floor, and conveyed out of the casting line by a conveyor 30. Further, here, the cart 8 with a surface plate removed from the mold 14 is conveyed upward and to the right in the figure by the conveyor line 31, and is supplied to the middle of the conveyor line 2.

As shown in FIG. 1, the mold cooling device 23 of this embodiment has the first lifter 24 and the second lifter 25.
In addition to the above, two parallel lifters are arranged such that their starting ends (lower ends in the figure) are adjacent to the first lifter 24, and transport the mold 14 together with the cart 8 with a surface plate upward in the figure. conveyor line 32.33, and the mold 14 carried in by the first lifter 24 is conveyed along with the cart 8 with a surface plate.
The traverser 34 supplies the distribution to the starting end of the conveyor line 32.
A single conveyor line 35 is arranged side by side with the conveyor line 33 so that the terminal end (lower end in the figure) is adjacent to the lifter 25, and conveys the mold 14 along with the cart 8 with a surface plate downward in the figure. , and a traverser 36 for supplying the mold 14 conveyed to the end of the conveyor line 32, 33 to the start of the conveyor line 35.

The mold cooling devices 23 of this embodiment are arranged in parallel on the conveyor line 35 so that their starting ends (lower ends in the figure) are adjacent to the second lifter 25, and the molds 14 are transported together with the trolley 8 with a surface plate. The figure shows two parallel conveyor lines 38 and 39 conveying upward, and the second lifter 2, respectively.
Three parallel conveyor lines 40 are arranged side by side on the conveyor line 33 so that the terminal end (lower end in the figure) is adjacent to the conveyor line 5, and convey the mold 14 along with the trolley 8 with a surface plate downward in the figure.゜41.42 and conveyor line 38.
A traverser 43 supplies the mold 14 conveyed to the terminal end (upper end in the figure) of the conveyor line 39 to the start end (upper end in the figure) of the conveyor line 40, 41, 42, and the conveyor line 35. The mold 14 conveyed to the terminal end of the conveyor line 3 is either handed over to the second lifter 25 or
8.39, and a traverser 44 that supplies the distributed portion to the starting end of the conveyor line 40, 41, 42, and delivers the mold 14 conveyed to the terminal end (lower end in the figure) of the conveyor line 40, 41, 42 to the second lifter 25. A second cooling line 45 is provided.

Here, conveyor line 32.33.35.38-42
have approximately the same configuration, for example, the conveyor line 32 has two hydraulic cylinders 46 provided at its starting end and a terminal end, respectively, facing each other, and connecting the starting end and terminal end in a straight line. It also includes two guide rails 47, as shown in FIG. 5, which fit into the wheels of the truck 8 with a surface plate and guide the movement of the truck 8 from the starting end to the terminal end.

Such a conveyor line 32 transports a large number of molds 14 closely aligned with each other on a guide rail 47 to a first lifter 2.
Two hydraulic cylinders 46 are installed along with the mold 14 lowered from the second floor and aligned with the trapazor 34 or its starting end.
The piston rods of the hydraulic cylinders 46 on the starting end side are further advanced while the piston rods of the hydraulic cylinders 46 on the terminal end side are retracted, thereby bringing the molds 14 into contact with each other. The molds 14 aligned by the traverser 34 are moved along the guide rail 47 at the starting end along with the trolley 8 with a surface plate without applying any impact.
At the same time, all the molds 14 on the kite rail 47 are moved by one mold along with the trolley with surface plate 8, and the molds 14 at the end are moved together with the trolley with surface plate 8 onto the traverser 36.
The operation of transferring the mold 14 upward is repeated, whereby the mold 14 is received from the traverser 34 at its starting end, is sequentially conveyed toward the terminal end, and is handed over to the traverser 36 from the terminal end.

The other conveyor lines mentioned above sequentially transport the molds 14 by the same operation.

In addition, the traversers 34, 36, 43, and 44 have approximately the same configuration, for example, the traversers 34, 34, 36, 43, 44,
As shown in FIG. 5, a trolley 48 on which the mold 14 can be placed along with the trolley 8 with a surface plate, two guide rails 49 that guide the movement of the trolley 48, and a rail connected to both ends of the trolley 48. It is equipped with a truck drive mechanism (not shown) that reciprocates the truck 48 along the guide rail 49 by pulling the chain 50, and the mold 14 placed on the truck 48 and the truck 8 with the surface plate are driven by the truck. Based on the operation of the mechanism, the trolley 48 is appropriately moved to convey and selectively align with one starting end of the conveyor line 32, 33.

The other traversers mentioned above also transport the mold 14 by similar operations, and the guide rail of the traverser 44 in particular penetrates the inside of the second lifter 25 and extends in the left-right direction in FIG. 1.

Further, here, the first lifter 24 and the second lifter 25 have substantially the same configuration, for example, the first lifter 24
As shown in FIG. 5, there are four perpendicular kite members 52 provided inside four pillars 51, and a guide member 52 that can be raised and lowered so as not to interfere with the traverser 44. An elevating arm 54 that is fitted together and has an engaging pawl 53 at its lower end that can engage with the trolley with a surface plate 8.
and a lifting hydraulic cylinder 55 which is attached downward to a member connecting the upper ends of the four pillars 51 and has its cylinder rod connected to the lifting arm 54, and a lifting hydraulic cylinder 55 which is pivotally supported by the four pillars 51 and oscillates. The carriage support position shown by the solid line in FIG. Figure 5 (a)
The swing arm 57 is provided with two swing arms 57, each having a large number of rollers, swinging between a standby position and a standby position shown in phantom lines.

The first lifter 24 moves the swinging arm 57 to the cart support position based on the operation of the swinging hydraulic cylinder 56, and receives the mold 14 along with the cart 8 with a surface plate onto its rollers from the conveyor line 16 on the second floor. After that, the lifting arm 54 is raised based on the operation of the lifting hydraulic cylinder 55, and the engaging claw 5 is raised.
3 lifts the trolley 8 with the surface plate on which the mold 14 is placed, and then swings the swinging arm 57 to the above-mentioned standby position, and then lowers the lifting arm 54 based on the operation of the lifting hydraulic cylinder 55. The trolley 8 with a surface plate on which the mold 14 is mounted is lowered from the second floor to the first floor and placed on the trolley 48 of the traverser 34.

At this time, the swing arm 57 is also moved to the above-mentioned cart support position to wait for the next cart 8 with a surface plate to be transferred there from the conveyor line 16.

Then, the second lifter 25 is also operated in a similar manner to lift the mold 1.
The cart 8 with a surface plate on which 4 is mounted is lifted from the first floor to the second floor.

In addition, the mold cooling device 23 of this embodiment is under the control of the casting line management computer 20 like the other casting equipment of the casting line, and as shown in FIG.
At the side of each end of the conveyor line 35, 40, 41, 42, a proximity sensor 19 similar to that shown in FIG. 4 is provided as mold identification means.

And here again, those proximity sensors 19 detect the flask 3.4.
The placement of the marking pin 18 is detected, and the result is judged by the casting line management computer 20 to determine the coating of the mold 14 that will be next fed into the second lifter 25 from the conveyor line 35 and traverser 44. identify the coats of those molds 14 and which coats of mold 1
Based on data on what type of product is to be cast in the casting line 4, the casting line management computer 20 controls the operations of the second cooling line 45 and the second lifter 25 as described below.

That is, in this mold cooling device 23, the first lifter 24 receives the molds 14 filled with molten metal one by one from the conveyor line 16 on the second floor at predetermined time intervals and lowers them to the first floor, where they are first cooled. The traverser 34 of the line 37 or its mold 14 is alternately fed to the two conveyor lines 32, 33, and the conveyor lines 32, 33 or its mold 1
4 is transported while cooling naturally in the atmosphere and transferred to the traverser 36.
The traverser 36 is transferred to the mold 14 alternately.
is supplied to the conveyor line 35, and the conveyor line 3
5 or the mold 14 is further transported while being naturally cooled in the atmosphere.

If the output signal of the proximity sensor 19 indicates that the mold 14 that has come to the end of the conveyor line 35 is a short-time cooling type in which normal cast iron is poured into the sand mold, the casting line management computer 2o Based on the control, the traverser 44 or its cart is positioned in the second lifter 25, and the second lifter 25 or its elevating arm is lowered to the first floor, and then the conveyor line 35 reaches the end of the mold 14. is delivered onto the trolley of the traverser 44, the second lifter 25 raises its elevating arm to the second floor, and delivers the mold 14 to the above-mentioned mold disassembly process on the second floor. 20 minutes to 30 minutes after pouring the mold 14
After cooling naturally for a minute, immediately unmold.

On the other hand, if the output signal of the proximity sensor 19 indicates that the mold 14 that has arrived at the end of the conveyor line 35 is a long-time cooling type in which ductile cast iron is poured into the sand mold,
Under the control of the casting line management computer 20, the traverser 44 or its carriage is positioned in the second lifter 25, and then the mold 14 is moved to the end of the conveyor line 35.
is delivered onto the traverser 44's cart, and the traverser 44
The molds 14 are alternately supplied to the two conveyor lines 38, 39 of the second cooling line 45, and the conveyor lines 38, 39 or the molds 14 are further conveyed while being naturally cooled in the atmosphere to the traverser 43. handed over alternately to
The traverser 43 sequentially supplies the molds 1.1 to the three conveyor lines 40.41.42, and these conveyor lines 40.41.42 further transport the mold 14 while cooling it naturally in the atmosphere. Then, the second lifter 25 lowers its elevating arm to the first floor, and then the traverser 44 transfers the cart to the second
The mold 14 is placed in the lifter 25 and placed in the second lifter 2.
5, the 21st lid 25 or its elevating arm is raised to the second floor, and the mold 14 is delivered to the above-mentioned mold breaking process on the second floor. After pouring the molten metal, allow it to cool naturally for 40 to 60 minutes, and then release the mold.

Moreover, here, the conveyor line 3 of the first cooling line 37
If the mold 14 that has reached the end of step 5 is of a short-time cooling type,
Based on the control of the casting line management computer 20, the second
Three conveyor lines 40.41.4 of cooling line 45
The mold 14, which is a long-time cooling type that has reached its terminal end, is kept on standby, and the conveyor line 35 preferentially delivers the mold 14 that has reached its terminal end onto the cart of the traverser 44, and transfers it to the second lifter. 25 delivers the mold 14 to the above-mentioned mold removal process on the second floor.

The casting line management computer 20 here also detects the types of cast products in the molds 14 that have come to the end of each of the conveyor lines 35, 40, 41, 42, and the codes of those molds 14 using proximity sensors I9. The type of the cast product in the mold 14 to be transferred to the second lifter 25 or the demolding process on the second floor is identified by detection, and the conditions such as the excitation force in the demolding machine 29 are thereby determined. Change as appropriate to suit the type of casting product.

Therefore, according to the mold cooling device 23 of this embodiment, it is possible to cool and cast two types of molds I4 and products made of two types of materials in one casting line by cooling each of them for an appropriate time. This eliminates the need to install two casting lines, reduces equipment costs, and prevents variations in the load on the product conveyance equipment and sand processing equipment even when the production volumes of two types of products are different. Further, since post-heat treatment of the product is not required and it becomes possible to ship the product in a tempered state, production costs can also be reduced.

Although the above has been explained based on the illustrated example, the present invention is not limited to the above-mentioned example. It may be changed as appropriate depending on the production volume, equipment installation conditions, etc.

(Effects of the Invention) Thus, according to the mold cooling device of the present invention, two types of molds and products made of two types of materials can be cooled and cast for appropriate times in one casting line, and therefore, It is not necessary to install two casting lines, which reduces equipment costs, and also prevents variations in the load on product conveyance equipment and sand processing equipment even when the production volumes of two types of products are different. In addition, there is no need for post-heat treatment of the product, and it becomes possible to ship the product in an as-cast state, thereby reducing production costs.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the mold cooling device of the present invention applied to a casting line for casting cast products for automobile parts, and Fig. 2 is a plan view showing other casting equipment of the above casting line. , Fig. 3 is a side view showing the mold in the casting line together with a cart with a surface plate, Fig. 4 is an explanatory diagram showing the control system of the mold cooling device of the above embodiment, Fig. 5 (a), (b) and (c) is a front view, a side view, and a horizontal sectional view taken along the line A-A, showing the first lifter in the mold cooling device of the above embodiment. 14″ mold 19° proximity sensor 23-′・
- Mold cooling device 20 - Casting line management computer 24 - First lifter 25 Second lifter 37 First cooling line 45 Second cooling line Fig. 2

Claims (1)

[Scope of Claims] 1. Mold carrying means (24) for carrying in a mold (14) filled with molten metal; and conveying the mold received from the mold carrying means from a starting end to a terminal end while cooling it naturally. The first cooling line (3
7); and a second cooling line (45), which has a starting end and a terminal end adjacent to the terminal end of the first cooling line, and transports the mold from the starting end to the terminal end while cooling it naturally. , a mold identifying means (19) at the terminal end of the first cooling line that identifies whether the mold conveyed there is a short-time cooling type or a long-time cooling type and outputs a signal indicating the same; The mold that has come to the end of the second cooling line is received and carried out, and based on the signal from the mold identification means, the mold that has come to the end of the first cooling line is recognized as a short-time cooling mold. In this case, the mold that has arrived at the end of the second cooling line is received and carried out first, and if the mold is a long-time cooling mold, it is received and transferred to the beginning of the second cooling line. A mold cooling device comprising means (20, 25).