JP2832109B2 - Mold making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in equipment for molding a mold by blowing compressed air into the surface of molding sand in a molding flask to compress the molding sand.

[0002]

2. Description of the Related Art Conventionally, in this type of mold making equipment, a casting flask generally placed on a model plate and charged with molding sand is pushed up by a pushing-up means, and then the molding sand is blown by a compressed air blowing device. It is configured such that compressed air is blown into the surface.

[0003]

However, in the conventional molding apparatus having the above-described structure, the lifting means is capable of firmly contacting the casting frame with the compressed air blowing device when blowing the compressed air. Requires a large force and a long lifting stroke for extracting the formed mold from the model plate. As a result, in particular, when a fluid cylinder is used as the lifting means, a large cylinder having a large diameter and a long length, a large hydraulic unit for operating the cylinder, a large-diameter high-pressure pipe, and the like are required. There were problems such as a large increase in expenses. The present invention has been made to solve the above problem.

[0004]

Means for Solving the Problems In order to achieve the above object, a mold molding apparatus of the present invention molds a mold by blowing compressed air into the surface of molding sand in a flask to compress the molding sand. In the mold making equipment, the first push-up means, the second push-up means disposed at a required interval in the horizontal direction with respect to the first push-up means 1, the first push-up means and the second push-up means, A traveling vehicle disposed so as to be able to reciprocate between positions immediately above the vehicle, a model plate placed on the traveling vehicle, and a model mounted on the traveling vehicle so as to be able to move up and down and raised by the first lifting means. A hollow roller conveyor for pushing up a casting flask on a plate, and a pressure for blowing compressed air to a surface of molding sand in the casting flask, which is disposed immediately above the second pushing up means and pushed up by the second pushing up means. Characterized by comprising an air blowing device.

[0005]

The equipment constructed in this way is configured such that after casting sand is poured into the casting flask at a position directly above the first lifting means, a model board, a casting frame, etc. are moved directly above the second lifting means by a traveling carriage. Then, the model plate, the casting frame and the like are raised to the compressed air blowing device by the second lifting means.
Next, compressed air is blown into the flask by a compressed air blowing device to compress the molding sand, and after the molding sand is completely compressed, the model plate, the flask and the like are lowered via the second push-up means. Then, the model plate, the casting frame and the like are transferred again to the position immediately above the first lifting means via the traveling cart. Next, the casting flask is pushed up from above the model plate via the first pushing-up means, and the mold is removed.

[0006]

An embodiment will be described with reference to the drawings. As shown in FIG. 2 which is a partial cross-sectional right side view showing an embodiment of the present invention, an upward first cylinder 2 as a first lifting means is installed on the left side of the base 1. On the right side, an upward second cylinder 3 as a second push-up means is installed at a required interval from the first cylinder 2. Above the first and second cylinders 2, 3, a pair of rails 4, 4 oriented in the left-right direction are arranged at a required interval in the left-right direction in FIG. The front end is supported by columns 5, 5, and the rear is supported by columns 6, 6 installed on the base 1. Also,
A traveling vehicle 7 is mounted between the rails 4 and 4 so that the traveling vehicle 7 can travel freely. A model plate 8 is placed on the upper surface of the traveling vehicle 7, and a casting frame 9 is placed on the model plate 8.

An elevating frame 10 is mounted on the traveling vehicle 7 via guide rods 11 mounted on the traveling vehicle 7 so as to be able to ascend and descend. 8, a hollow roller conveyor 12, which can be pushed up from above, is mounted. Also,
A filling frame 14 is mounted on the upper end of the hollow roller conveyor 12 via round bars 13, 13. A small-diameter neck is formed on the upper part of the piston rod of the first cylinder 2 so that it can be engaged with and disengaged from the dovetail groove 15 formed on the lower part of the lifting frame 10. An elevating table 17 having a groove 16 through which the lower end of the elevating frame 10 can pass is formed on the upper end of the piston rod of the second cylinder 3.

A ceiling frame 18 is provided between the upper ends of the columns 6, 6, and a compressed air blowing device 19 is mounted on the ceiling frame 18. In the compressed air blowing device 19, a tank 20 for storing compressed air is installed on the ceiling frame 18, and a ventilation pipe 30 extending downward and penetrating vertically through the ceiling frame 18 is provided in the tank 20.
Further, an opening / closing valve mechanism 21 for opening and closing an exhaust port (not shown) formed at the upper end of the ventilation pipe 30 is mounted in the tank 20, and a squeeze is provided at the lower end of the ventilation pipe 30. A compressed air distribution plate 22 also serving as a plate is fixed, and exhaust holes 31, 3 are provided between the ventilation pipe 30 and the compressed air distribution plate 22.
A cover 23 for hermetically sealing the upper end opening of the filling frame 14 is attached to the lower part of the ventilation pipe 30 so as to be able to ascend and descend, and as shown in FIG. Are mounted with horizontal cylinders 25 for moving the stoppers 24 forward and backward. As shown in FIG. 2, a transfer member 26 is provided between the right ends of the rails 4 and 4, and a cylinder 27 is provided on the transfer member 26 in a left-right direction. , Is detachably connected to the right side of the traveling vehicle 7 via a pin hook mechanism 28. Reference numeral 29 denotes a hollow roller conveyor for transporting the casting flask 9.

Next, the operation of the equipment configured as described above will be described. As shown in FIG. 2, casting sand S is added to the casting frame 9 and the filling frame 14 located immediately above the first cylinder 2.
Input. Next, the cylinder 27 is contracted to transfer the model plate 8, the casting frame 9, etc. to the position immediately above the second cylinder 3 using the traveling carriage 7, and then the cylinders 25, 25 are extended to blow compressed air. Stoppers 24, 24 are inserted between the cover 23 of the device 19 and the ceiling frame 18,
The cover 23 is prevented from rising. Next, the second cylinder 3 is extended and the traveling carriage 7 is pushed up from the rails 4 and 4, and at the same time, the casting frame 9, the filling frame 14 and the like are raised, and the upper end of the filling frame 14 is hermetically sealed to the lower surface of the cover 23. Then, the opening / closing valve mechanism 21 of the compressed air blowing device 19 is opened, and the compressed air in the tank 20 is discharged from the exhaust holes 31, 31 through the ventilation pipe 30 into the casting sand S in the filling frame 14. The molding sand is pre-compressed by blowing into the upper surface. After the compressed air is completely blown, the cylinders 25, 25 are contracted to retract the stoppers 24, 24 from between the ceiling frame 18 and the cover 23, and then the second cylinder 3 is further extended to operate the model plate. 8, the casting frame 9, the filling frame 14 and the like are further raised and the cover 23 is pushed up, whereby the pre-compressed molding sand S is further compressed by the compressed air dispersion plate 22.

After the molding sand has been compressed, the second cylinder 3 is contracted to lower the traveling vehicle 7, the model plate 8, the casting frame 9 and the like, and the traveling vehicle 7 is placed on the rails 4, 4. , The cylinder 27 is extended and the traveling carriage 7 is used to hold the model plate 8,
The casting flask 9 and the like are returned to a position immediately above the first cylinder 2. Next, the first cylinder 2 is extended to operate the elevating frame 10,
The hollow roller conveyor 12 is raised, whereby the casting frame 9 is raised by the hollow roller conveyor 12 to perform die cutting. In addition, as the hollow roller conveyor 12 is raised, the filling frame 14 is also raised via the round bars 13, 13. After the die-cutting is completed, the casting flask 9 containing the mold is sent out onto the hollow roller conveyor 29, and another empty flask 9 is loaded onto the hollow roller conveyor 12, and then the first cylinder 2 is contracted. Then, the state shown in FIG. 2 is established, and one cycle is completed. In the above embodiment, the cylinders 2 and 3 are used as the first and second push-up means. However, other conventional push-up means such as an electric cylinder may be used. Further, depending on the shape of the model plate 8, the compression step by the compressed air distribution plate 22 may be omitted. Further, the filling frame 14 may be omitted in some cases.

[0011]

As is apparent from the above description, the present invention provides a method for raising a model plate, a casting frame, and the like when blowing compressed air into the surface of a molding sand by means of a second pushing-up means and for releasing the mold. Since the casting frame is raised by the first lifting means, excellent effects are obtained, such as being smaller and less expensive than the conventional lifting means.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an embodiment of the present invention.

FIG. 2 is a right side view, partially in section, showing one embodiment of the present invention.

[Explanation of symbols]

 2 1st cylinder 3 2nd cylinder 7 Traveling trolley 8 Model board 9 Cast frame 12 Hollow roller conveyor 19 Compressed air blowing device

Claims (1)

(57) [Claims] 1. A molding apparatus for molding a mold by blowing compressed air into the surface of molding sand in a molding flask to compress the molding sand, wherein the first pushing means 2 and the first pushing means 2 are provided. A second push-up means 3 arranged at a required interval in the horizontal direction and the first push-up means 2
And a traveling vehicle 7 disposed so as to be able to reciprocate between a position directly above the second lifting means 3, a model plate 8 placed on the traveling vehicle 7, and mounted on the traveling vehicle 7 so as to be able to move up and down. And a hollow roller conveyor 1 which can be raised by the first lifting means 2 to lift up the casting frame 9 on the model plate 8.
2 and a compressed air blowing device 19 that is disposed immediately above the second lifting means 3 and blows compressed air onto the surface of the molding sand in the casting flask 9 pushed up by the second lifting means 3. Mold molding equipment.