JPH0638596Y2 - Shell machine blowing position switching device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is designed to selectively mold only necessary molds by using a multi-molding mold that has many sand blow holes in the mold. The present invention relates to a shell machine blowing position switching device.

[Conventional technology]

Conventionally, in the case of a shell machine that uses a multi-cavity mold with multiple sand blow holes in the mold, it is well known that multiple blow nozzles are attached to the blow head. The reason why a part of the core or the like needs to be molded with the mold is to not mold an extra (unnecessary) core, and to mold only what is called necessary to eliminate waste.

However, under the present circumstances, it is difficult to blow sand from only a part of the plurality of sand blowing nozzles into only a mold that requires a large number of molding dies.

In addition, it is possible to blow a large number of sand from only a part of the sand blowing nozzles into the sand blowing holes of the molding die by the blow head replacement work, but there are the following problems. There is.

[Problems to be solved by the device]

In order to mold a part of the core with the multi-molding mold of the conventional example described above, it is necessary to change the blow head.
The number of steps for changing the blow head increases. Therefore, the cost for automatically changing the blow head in order to save the man-hours for changing the blow head is not small as compared with the molding of the extra core, and the cost is not small. Is not realistic.

Therefore, in order to solve the above problems, the present invention is to selectively mold only a necessary mold or the like from a multi-mold molding mold without replacing the blow head.

[Means for Solving the Problems]

Therefore, the present invention solves the above-mentioned problems by providing a plurality of sand blowing nozzles in a blow head and making these sand blowing nozzles selectively correspond to a plurality of sand blowing holes of a multi-mold molding die. It is what

More specifically, the present invention relates to a sand hopper (4) at a sand replenishing position (A) and a sand blowing position (B) on a rail (2) horizontally installed by a blow head (1) by a trolley (3). ) In a shell machine capable of moving in parallel with the mold (5), a plurality of sand blowing nozzles (11a), (11b), (11c), (11d) are provided on the blow head (1). And these sand blowing nozzles (11a) to (11d) are selectively applied to a plurality of sand blowing holes (12) and (13) provided in the sand blowing surface (5a) of the multi-molding die (5). And the sand blowing nozzles (11a) to (11d) corresponding to the sand blowing holes (12) and (13) are opened. ), The sand blowing nozzle (11a) to the work molding cavities (14) and (15)
The sand blowing stop position of (11d) is selectively switched to perform molding.

[Action]

A rail (2) is installed horizontally between the adjacent sand hoppers (4) and the multiple-molding molding die (5), and the blow head (1) is mounted on the rail (2) by the carriage (3). ) Allows parallel movement between the sand hopper (4) at the sand supply position (A) and the mold (5) at the sand blowing position (B).

A plurality of blow heads (1) are provided on the blow head (1) by changing the blow side stop position of the blow head (1) on the mold (5) as shown in FIGS. 2 to 4. Sand blowing nozzles (11a), (11b), (11c), (11d), a plurality of sand blowing holes (12), (13) provided in a multi-molding die (5). ), Fig. 2 and Fig. 3
As shown in Fig.4 and Fig.4,
By opening the sand blowing nozzles (11a) to (11d) of the blow head (1) that correspond to the sand blowing holes (12) and (13) of the die (5), the necessary mold (5) can be obtained. Sand is blown into the mold only from the sand blowing nozzles (11a) to (11d) to make a mold.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention, and FIG. 1 shows a schematic configuration of a shell machine blowing position switching device of the present invention, in which a blow head 1 is in a horizontal direction. On the rails 2 installed on the ground, by means of a trolley 3, a solid line position 1 at the bottom of the sand hopper 4 at the sand supply position A and a chain line at the upper part of the multi-cavity molding die 5 (hereinafter referred to as the die 5) at the sand blowing position B are shown. A shell machine is formed in such a way that it can be translated between position 1 '.

Reference numeral 6 is a blow head crimping device, and this blow head crimping device 6 is adapted to be operated by the supply of compressed air, and is arranged on the upper part of the mold 5 so that the blow head 1'is It is adapted to be crimped to the mold 5.

Reference numeral 7 is a wheel, which allows the carriage 3 to move laterally on the rail 2 in the directions of arrows a and b, and the blow head 1 is shown on the carriage 3. It is suspended by springs that are not attached. Further, reference numeral 8 is a shutter, and this shutter 8 has a function of opening and closing the sand input port 9 of the sand hopper 4 to input the sand 10 in the sand hopper 4 to the blow head 1.

As shown in FIG. 1, the blow head 1 is provided with a plurality of sand blowing nozzles 11a, 11b, 11c, 11d, and the sand blowing surface 5a of the mold 5 has a plurality of sand blowing holes 12a. , 13 are provided, and the pitch dimension C of the sand blowing holes 12, 13 is, as shown in FIGS. 1 and 2, the sand blowing nozzles 11a and 1a.
It is set to be the same as the pitch dimension between 1d.

Further, the dimension between the sand blowing nozzles 11a and 11b and 11c and 11d is set to the D dimension, and the plurality of sand blowing nozzles 11a, 11b, 11c and 11d are set in the mold 5 within the range of the D dimension. The sand blowing stop position of the blow head 1 is selectively switched to two or more positions by selectively corresponding to the plurality of sand blowing holes 12 and 13.

Furthermore, the mold 5 has one work molding cavity 14 formed after the sand blowing hole 12, and the other work molding cavity 15 formed after the sand blowing hole 13. , The sand blowing nozzles corresponding to at least one of the sand blowing holes 12 and 13 are configured to open (not shown). Therefore, the sand in the blow head 1 is selected from the corresponding sand blowing nozzles. , The sand blowing nozzle 11a through the sand blowing hole and into the necessary work molding cavity of the mold 5 (either reference numeral 14 or 15 shown in FIG. 2 or reference numeral 14 or 15 shown in FIG. 3 or 4). The sand blowing stop position of ~ 11d is selectively switched to perform molding.

More specifically, the blow head 1'shown in chain line in FIG.
The change of the sand blowing stop position of the sand blowing position B will be described with reference to the drawings from FIG. 2 to FIG.

FIG. 2 shows a standard state of the present invention. In FIG. 2, one and the other work forming cavities for two pieces are contained.
In order to blow sand into both 14, 15, sand blowing nozzle 11a and sand blowing hole 12 and sand blowing nozzle 11d and sand blowing hole 13 are selected and corresponded, and their centers are made to coincide with each other, and sand blowing nozzles 11a, 11
It shows a state in which the sand 10 in the blow head 1 is blown into the one and the other work molding cavities 14 and 15 by opening d.

The sand blowing nozzles 11b and 11c shown in FIG. 2 are configured such that the sand blowing nozzles 11b and 11c are closed even when they contact the sand blowing surface 5a of the mold 5. Sand 10 will not blow out of 11b and 11c.

Next, the case of using the mold 5 similar to that shown in FIG. 2 to mold only the left-side work by blowing sand 10 into only one work-molding cavity 14 of the mold 5 will be described with reference to FIG. That is, the sand blowing nozzle 11b and the sand blowing hole 12 are selected and corresponded by switching the sand blowing stop position of the blow head 1 by the dimension D in the arrow A direction (left direction) as compared with FIG. Then, by aligning their centers and opening the sand blowing nozzle 11b, the sand 10 in the blow head 1 is
It shows a state of being blown into one of the workpiece molding cavities 14.

In the case of FIG. 3, the sand blowing nozzle 11 is provided on the sand blowing hole 13.
Since c and 11d are not selectively supported, the sand 10 in the blow head 1 is not blown into the other work molding cavity 15.
In addition, the sand blowing nozzles 11a, 11c, 11d are attached to the sand blowing surface 5 of the mold 5.
The sand blowing nozzles 11a, 11c, 11d are configured so as to be closed even when they come into contact with a, so that the sand
0 never blows.

A case of using the same die 5 as in FIG. 2 and blowing sand 10 into only the other work forming cavity 15 of the die 5 to form only the right side work will be described with reference to FIG. That is, the sand blowing nozzle 11c and the sand blowing hole 13 are selected and corresponded by switching the sand blowing stop position of the blow head 1 by the dimension D in the arrow B direction (right direction) as compared with FIG. Let them match their centers and sandblast nozzle
It shows a state where the sand 10 in the blow head 1 is blown into the other work molding cavity 15 by opening 11c.

In addition, in the case of FIG. 4, a sand blowing nozzle is provided on the sand blowing hole 12.
Since 11a and 11b are not selectively supported, the sand 10 in the blow head 1 is not blown into the one work molding cavity 14. Even if the sand blowing nozzles 11a, 11b, 11d come into contact with the sand blowing surface 5a of the mold 5, the sand blowing nozzles 11a, 11b, 11d are configured to be closed, so the sand blowing nozzle 11a, 11b, 11
Sand 10 never blows from d.

In addition, in the embodiment of the present invention, the sand blowing stop position of the blow head 1 is set to 3 positions to enable selective molding of 2 loading works, but depending on the size and arrangement of the sand blowing nozzle, 4 positions or more are possible. It is added that it is also included in another embodiment of the present invention that the required work can be selectively molded in only two positions.

[Effect of device]

As described above, the present invention provides a plurality of sand blowing nozzles on the blow head, and makes these sand blowing nozzles selectively correspond to the plurality of sand blowing holes of the multi-molding die. Since it becomes easy to mold only the work and the production with less waste is possible, the following effects are obtained as compared with the conventional device which is considered to be difficult to perform selective molding.

i) Even if a molding defect occurs, since only the defective work can be molded and replenished in the next cycle, it is possible to insert different kinds of works and perform simultaneous molding.

ii) Since even a die having a sand blowing hole arranged outside the maximum blowing dimension of the blow head can be blown by changing the blow head blowing position, it is possible to selectively mold even a larger type of different work pieces.

iii) Normally, even if the required number of different workpieces are combined, only the required number of molds can be produced, so that the number of dies and the machine setup change (replacement) can be reduced, and the cost can be reduced.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a view showing a schematic configuration of a shell machine blow-in position switching device of the present invention, and FIG. 2 is FIG. Enlarged views showing the sand blowing stop position and the sand blowing state in the standard state of two blow heads in the state shown by chain lines, and FIGS. 3 and 4 are one and the other of the blow heads in the state shown in FIG. FIG. 3 is an enlarged view showing the state of each of the sand blowing into the work molding cavity of FIG. 1 …… Blow head 2 …… Rail 3 …… Truck 4 …… Sand hopper 5 …… Mold 5a …… Sand blowing surface A …… Sand replenishment position B …… Sand blowing position 11a, 11b, 11c, 11d …… Sand blowing nozzles 12, 13 …… Sand blowing holes 14 …… One work molding cavity 15 …… The other work molding cavity

Claims (1)

[Scope of utility model registration request] 1. A shell machine in which plural blow heads can be moved in parallel between a sand hopper at a sand replenishing position and a mold at a sand blowing position by means of a trolley on a rail on which a blow head is horizontally installed. Providing individual sand blowing nozzles, stopping these sand blowing nozzles by selectively corresponding to a plurality of sand blowing holes provided on the sand blowing surface of a multi-molding die, and selecting a sand blowing hole. It is configured such that the corresponding sand blowing nozzle is opened, and the sand blowing stop position of the sand blowing nozzle is selectively switched to the work molding cavity required for the multi-cavity molding die to perform molding. Shell machine blow position switching device.