JP2009050910A - Cooling line for green sand mold poured with molten metal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling line for green sand molds poured with molten metal which is appropriately adapted to high-mix low-volume casting production, and can select and adjust cooling time for green sand molds poured with molten metal per green sand mold. <P>SOLUTION: The cooling line comprises: at least three or more odd numbers of transferring means 7 to 9 which can transfer a plurality of molding flasks F with built-in green sand molds so as to be linearly extended in a line and which are arranged in parallel to each other; two conveying means 10, 11 installed in the outside positions of both edges of the transferring means and conveying the molding flasks between the transferring means; and extruding-buffering means 12 to 17 which are installed in the positions near both edges of the respective transferring means with the conveying means sandwiched and each of which has an extruding function of extruding the molding flasks on the conveying means to the confronted transferring means and a buffering means of mildly receiving the molding flasks extruded onto the transferring means. The extruding-buffering means extrude or mildly receive the molding flasks, and thus, the molding flasks are transferred on one transferring means or on three or more odd numbers of transferring means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a line capable of selecting / adjusting the residence time of the green mold when the molten sand in the green mold is cooled by temporarily retaining the poured fresh sand mold (hereinafter referred to as “green mold”) temporarily. About.

Conventionally, as one of this type of line, a group of cast frames formed by linearly connecting a plurality of cast frames containing a poured mold is pushed out by a pusher cylinder at a pitch of one cast frame. A mold that cools the molten metal by arranging a plurality of cooling lines configured to decelerate and stop the cast frame group by a cushion cylinder and installing a traverser line outside the cooling cylinder on the cushion cylinder side. There is a structure in which a built-in cast frame is sent out in a predetermined direction via a traverser line.
Japanese Patent Laid-Open No. 2001-198668 FIG.

By the way, in general, in the production of many kinds and small quantities of castings with various casting weights and casting materials, the cooling time of the casting mold after pouring is different for each casting mold. In the conventional cooling line with a poured hot water configured as described above, it is not possible to accurately cope with the production of castings of various kinds and small quantities. For this reason, this type of industry demands the development of a pre-filled green cooling line that can select and adjust the cooling time of the green mold after pouring for each mold in response to the production of a small variety of castings. It had been.
The present invention has been made in view of the above circumstances, and its purpose is to select and adjust the cooling time of the green mold after pouring for each green mold in an appropriate manner for the production of castings of various types and small quantities. The purpose is to provide a fresh cooling line that has already been poured.

In order to achieve the above object, the cooling line for the poured hot mold according to the present invention selects the dwell time for the molten mold in order to cool the molten metal in the green mold by temporarily retaining the poured hot mold. An at least three or more odd number of transfer means which are adjustable lines, and are capable of transferring a plurality of casting frames containing the green mold in a straight line and arranged in parallel with each other; Two conveying means installed at positions outside both ends of these conveying means to convey the casting frame between these conveying means;
An extruding function that is installed in the vicinity of both ends of the transfer means with the transfer means sandwiched between them and pushes the casting frame on the transfer means to the transfer means facing the transfer means, and the casting that has been pushed out onto the transfer means. A pushing and cushioning means having a cushioning function for receiving the frame in a relaxed manner,
The pushing / buffering means pushes out or relaxes the casting frame, so that the casting frame is transported on one transporting means or on an odd number of three or more transporting means. It is characterized by that.

As is apparent from the above description, the present invention is a line capable of selecting and adjusting the residence time of the mold when the poured mold is temporarily retained to cool the molten metal in the mold. , At least three odd number of transfer means that can transfer a plurality of casting frames containing the green mold in a straight line and are arranged in parallel to each other, and outer positions of both ends of these transfer means And the two conveying means for conveying the casting frame between these conveying means and the conveying means sandwiched between the conveying means at positions near both ends of the conveying means, and the casting frame on the conveying means A pushing / buffering means having an extruding function for extruding the sheet to the conveying means opposed to each other and a buffering function for relaxingly receiving the casting frame extruded onto the conveying means, wherein the pushing / buffering means comprises: For extruding or relaxing the casting frame As a result, the casting frame is transferred on one transfer means or on an odd number of three or more transfer means. It has excellent practical effects such as the cooling time of the mold can be selected and adjusted accurately for each mold.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of a green mold making / cooling line to which the poured hot mold cooling line of the present invention is applied will be described in detail with reference to FIGS. As shown in FIG. 1, this green mold making / cooling line is equipped with a green mold making machine 1 to mold a green mold, and a hot water pouring machine 3 is used to pour into the green mold. A pouring line 4 and a poured cooling mold 5 for cooling the poured mold are configured.

And, as shown in FIG. 1 and FIG. 2, the cooling line 5 of the poured molten green mold can transfer a plurality of casting frames F containing the green mold in a straight line and are parallel to each other. Three transfer means 7 to 9 arranged side by side, and a first transfer means 10 that is installed at outer positions at both ends of the transfer means 7 to 9 and transfers the casting frame F between the transfer means 7 to 9. And the second conveying means 11 and the three conveying means 7 to 9 are respectively installed in the vicinity of both ends of the first conveying means 10 and the second conveying means 11 with the first conveying means 10 or It has an extruding function for extruding the casting frame F on the second conveying means 11 to the opposing one of the transfer means 7 to 9, and a buffering function for relaxingly receiving the casting frame F extruded by the conveying means. Hydraulic cylinder as pushing and buffering means And from 2 to 17, in are configured.
Each of the hydraulic cylinders 12 to 17 has, as a stroke, a dimension obtained by adding the gap between the tip of the hydraulic cylinder and the casting frame F to the length of the casting frame F, as shown in FIG.

Further, as shown in FIG. 2, each of the transfer means 7 to 9 includes a surface plate carriage 18 on which the casting frame F is placed, and a pair of first rails 19 on which a plurality of surface plate carriages 18 are movably mounted. It consists of. The first transport means 10 includes a self-propelled carriage 20 on which the surface plate carriage 18 is movably mounted, and a pair of second rails 21 on which the carriage 20 is movably mounted. . Similarly to the first transfer means 10, the second transfer means 11 includes a pair of self-propelled carriages 40 on which the surface plate carriage 18 is movably mounted, and a pair of the carriages 40 that are movably mounted. The third rail 41 is configured. Further, as shown in FIG. 3, a hydraulic circuit 22 is connected to each of the hydraulic cylinders 12 to 17, and this hydraulic circuit 22 is an extrusion circuit that gives an extrusion function to each of the hydraulic cylinders 12 to 17. 23 and a buffer circuit 24 for providing a buffer function to each of the hydraulic cylinders 12 to 17.

In the push-out circuit 23, a hydraulic pump (not shown) switches the operation direction and speed of the hydraulic cylinder, and the logic valve 26 prevents the hydraulic cylinder from extending when the proportional control valve 25 is in the neutral position. , And a pipe 27 in order, are connected to an extension operation port of a hydraulic cylinder, and the proportional control valve 25 is a two-position four-way electromagnetic first direction switching valve for switching the direction of the flow of hydraulic oil. 28 is connected to the contraction operation port of the hydraulic cylinder through 28. Further, the first direction switching valve 28 is provided with a two-position four-way electromagnetic second direction switching valve 29 for switching high pressure oil and low pressure oil necessary for the buffer function in the buffer circuit 24. A controller 30 is connected to the proportional control valve 25.
In the figure, reference numerals 31 to 33 are relief valves, and 34 is a check valve.

For example, as shown in FIG. 3, after the hydraulic cylinder 15 adapted to generate the buffer function is extended by the hydraulic circuit 22 described above, the hydraulic cylinder 14 adapted to generate the push-out function is extended and operated. When the platen carriage 18 on 40 is pushed out on the first rail 19 in the direction indicated by the arrow 35 and received by the hydraulic cylinder 15, the pressure of the pressurized oil from the hydraulic pump is controlled by the proportional control valve 25, and the hydraulic cylinder The extension operation of 14 is initially slow, followed by high speed, after which the extension state is maintained. On the other hand, the contraction operation of the hydraulic cylinder 15 is first accelerated by the low-pressure hydraulic oil and then reaches a constant speed. Subsequently, the hydraulic cylinder 15 is decelerated under the high-pressure hydraulic oil, and then the contracted state is maintained. As a result, the hydraulic cylinder 14 pushes the surface plate carriage 18 at a high speed, and the hydraulic cylinder 15 receives the pushed surface plate carriage 18 in a relaxed manner.

Further, as shown in FIG. 2, positioning means 36 and 37 for positioning the casting frames F at both ends of the casting frame group 6 on the feeding means are separately provided near both ends of the feeding means 7 to 9, respectively. Each of the positioning means 36 and 37 is provided with a hook 38 configured to be vertically rotatable and a lateral hydraulic cylinder 39 for vertically rotating the hook 38.
In addition, by using the positioning means 36 and 37, the surface plate carriage 18 that is not fed by the gap between the surface plate carriages 18 and 18 is positioned while feeding a small amount, and the surface plates before and after the surface plate carriage 18 are positioned. A gap can be provided between the carriages 18 and 18.

As shown in FIG. 1, in the case of the construction described above, when the residence time of the green mold after pouring is relatively short, as shown in FIG. After the first carrier means 10 is placed on the carriage 20, the carriage 20 is moved intermittently in the direction indicated by the arrow 51 via the second rail 21. Next, after extending the hydraulic cylinder 12 adapted to generate the buffer function, the hydraulic cylinder 13 adapted to generate the push-out function is extended to move the surface plate carriage 18 on the carriage 20 to the first of the transfer means 7. It is pushed onto the rail 19 in the direction indicated by the arrow 52 and received by the hydraulic cylinder 12. By repeating the above operation, a plurality of casting frames F containing the mold after pouring are arranged on the first rail 19 of the transfer means 7. Similarly, on the first rails 19 of the other transfer means 8 and 9, the casting frames F containing the molds after pouring are arranged to cool the molds after pouring. Then, after the time required for cooling the molten metal in the green mold elapses, the green mold cooled by the carriage 40 of the second transfer means 11 via the third rail 41 is transferred to the green mold release station. .

In addition, if the residence time of the green mold after pouring is long, as shown in FIG. 4, first, as in the case shown in FIG. 1, the hydraulic cylinder 12 adapted to generate a buffer function is extended. Thereafter, the hydraulic cylinder 13 adapted to generate the push-out function is extended to push the surface plate carriage 18 on the carriage 20 onto the first rail 19 of the transfer means 7 in the direction indicated by the arrow 53 and at the hydraulic cylinder 12. After forming the cast frame group 6 on the first rail 19 of the plurality of transfer means 7 by receiving the cast mold F with the received and poured molten metal mold, the cast frame F at the end of the cast frame group 6 is transferred to the second conveying means. Then, the carriage 40 is moved one lane in the direction indicated by the arrow 54 via the third rail 41. Next, after extending the hydraulic cylinder 15 adapted to generate the buffer function, the hydraulic cylinder 14 adapted to generate the push-out function is extended to move the platen carriage 18 on the carriage 40 to the first of the transfer means 8. It is pushed out in the direction indicated by the arrow 55 on one rail 19 and received by the hydraulic cylinder 15. The above operation is repeated to arrange a plurality of cast frames F containing the poured mold on the first rail 19 of the transfer means 8 (see FIG. 5).
In the same manner, a plurality of cast frames F containing the poured molds are also arranged on the first rail 19 of the transfer means 9. After the time required for cooling the molten metal in the green mold elapses, the casting frame F at the tip of the casting frame group 6 of the transfer means 9 is placed on the carriage 40 of the conveying means 11, and then this carriage 40 is attached to the third rail. It moves to the direction shown by the arrow 56 via 41, and it conveys to a green type | mold release station.

In the above-described embodiment, the hydraulic cylinder provided with the hydraulic circuit 22 is used as the pushing / buffering means. However, the invention is not limited to this. For example, as shown in FIGS. -You may make it use the electric cylinder provided with the function as a buffer means. That is, an extruding function for extruding to the transfer means facing each other across the first conveying means 10 and the second conveying means 11 at positions in the vicinity of both ends of the conveying means 7 to 9 and the extruded on the conveying means Electric cylinders 62 to 67 as pushing / buffering means having a buffering function for receiving the casting frame F in a relaxed manner may be provided.

Furthermore, the electric cylinders 62 to 67 control the magnitude of the supplied electric power, thereby changing the pushing force to generate the pushing function, or changing the magnitude of the resistance force to function as a buffer means. It can also be generated.
In the above embodiment, three transfer means are provided. However, the present invention is not limited to this, and any number of transfer means may be used as long as it is an odd number of three or more.

It is a top view of one Example of the cooling line of the poured hot mold which applied this invention. It is an AA arrow line view in the case of FIG. FIG. 2 is a hydraulic circuit diagram of the hydraulic cylinder of FIG. 1. It is action | operation explanatory drawing of the cooling line of the hot mold after shown in FIG. It is an AA arrow line view in the case of FIG. It is a corresponding | compatible figure of FIG. 2 in the other Example of the injection-cooled green type cooling line to which this invention is applied. FIG. 6 is a diagram corresponding to FIG. 5 in another embodiment of the cooling line of the poured hot mold to which the present invention is applied.

Explanation of symbols

7; 8; 9 Transfer means 10 First transport means 11 Second transport means 12; 13; 14; 15; 16; 17 Hydraulic cylinder

Claims (6)

When the molten mold in the mold is temporarily retained to cool the molten metal in the mold, the residence time of the mold can be selected and adjusted.
An odd number of at least three or more transfer means capable of transferring a plurality of casting frames containing the green mold in a straight line and arranged in parallel with each other;
Two conveying means installed at positions outside both ends of these conveying means to convey the casting frame between these conveying means;
An extruding function that is installed in the vicinity of both ends of the transfer means with the transfer means sandwiched between them and pushes the casting frame on the transfer means to the transfer means facing the transfer means, and the casting that has been pushed out onto the transfer means. A pushing / buffering means having a buffering function for receiving the frame in a relaxed manner;
Comprising
The pushing / buffering means pushes out or relaxes the casting frame, so that the casting frame is transported on one transporting means or on an odd number of three or more transporting means. A cooling line with a poured hot water, characterized by In the cooling line of the poured hot mold according to claim 1,
The said injection | pouring means contains the surface plate trolley which mounts the said cast frame, and a pair of 1st rail which mounts a some surface plate trolley so that a movement is possible, The hot-cooled raw type cooling line characterized by the above-mentioned. In the cooling line of the poured hot mold according to claim 1 or 2,
The conveying means includes a self-propelled carriage on which the surface plate carriage is movably mounted, and a pair of second rails on which the carriage is movably mounted. Cooling line. In the cooling line of the poured hot mold according to any one of claims 1 to 3,
The hot water injection type cooling line, wherein the pushing / buffering means is a hydraulic cylinder or an electric cylinder provided with means for generating a pushing function and a buffering function. In the cooling line of the poured hot mold according to any one of claims 1 to 4,
A pouring green type cooling line, wherein positioning means for positioning the casting frame at the tip on the transfer means are separately provided in the vicinity of both ends of the transfer means. In the cooling line of the poured hot mold according to claim 5,
The above-mentioned positioning means includes a hook that can be positioned while moving the transport carriage back and forth along the transfer means.