JPS6317557Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an apparatus for filling a molding flask with foundry sand in a full mold casting method.

``Prior Art'' Conventionally, as a device for automatically filling molding sand of this type, a sand filling device is disclosed in Utility Model Publication No. 55-46357, and this device has a sand filling device connected to a sand hopper through a shutter at the top. In a sand filling device in which a filter and a sand receiver are used as inner and outer cylinders, an air chamber is provided on the outer periphery of the sand receiver that is directly connected to a compressed air tank, and a diaphragm is provided above the sand receiver and the air chamber. In addition, Japanese Utility Model Publication No. 57-42586 discloses a shell sand filling device for a shell machine, which consists of a blow head that has an upward opening and can be moved in an approximately horizontal direction, and a fixed cylinder that is mounted in a fixed position. a movable cylinder slidable in the axial direction and airtightly fitted to the blowhead, the movable cylinder being able to tightly fit around the opening of the blowhead when moved toward the blowhead; The structure is such that compressed air is blown into the blow head through the blow head to fill the shell mold with the shell sand contained in the blow head.

"Problems that the invention attempts to solve" The prior art according to this document has the problem that when trying to apply vibration to the casting flask and fill it with molding sand, it is difficult to apply this vibration. This is because the mold is crimped onto the blowing machine or blow head. In addition, as the structure becomes more complex, the process also becomes more complex. For example, in Utility Model Publication No. 57-42586, the first step is to drop shell sand into the blowhead, move the blowhead,
The mold shell sand is filled through the process of pumping compressed air, lowering the movable cylinder, blowing compressed air into the blow head, and filling the shell mold with shell sand, which is a very complicated problem. The dot was hot.

``Means for solving the problem'' In view of the above, the present invention has a simple structure that allows filling into the flask.The gist is that a hopper with a funnel-shaped opening is built on the frame. death,
A space is formed on the lower surface of this hopper, and a cylinder is used to operate a lid that fully opens and closes the opening of this hopper, so that it can freely enter and retract into the space, and a slight gap is formed between the lid and the lid. A flask with an open top surface is arranged in this manner, a flask plate on which the flask is placed is slidably provided on a guide rail of the base, and a cylinder is provided to operate this flask plate. , a vibrator is provided between the bases and at the bottom of the opening of the hopper and moves up and down in an upright direction to move into contact with and away from the flask mounting plate, or to move the flask up and down; This is a foundry sand filling device characterized by applying vibration to a casting flask with an open top surface.

"Operation" Next, the operating state of the present invention will be described. The flask mounting plate 8 is positioned at the retract limit, and the flask 13 with its top open is placed on the flask mounting plate 8. cylinder 9
is activated to advance the flask mounting plate 8 and flask 13 (hereinafter referred to as flask 13 when the flask mounting plate 8 and flask 13 are transferred at the same time), and through a limit switch (not shown), etc. (The same applies hereafter) When the casting flask 13 and the like are positioned below the opening 2 of the hopper 3, and in this state, the cylinder 5 is operated and the lid 4 is retreated, the opening 2 of the hopper 3 is fully opened and the molding sand 14 accommodated therein is is flowed down a predetermined amount into the flask 13,
When the predetermined amount is reached, the lid 4 is moved forward to completely close the opening 2 of the hopper 3. Here, vibrator 10
is raised via an air spring 11 etc., and the flask mounting plate 8 is lifted by the vibrator 10 rising and removed from the guide rail 7 of the base 6, and the flask 1
After lifting the third grade, the vibrator 10 is operated to compact the cast sand 14, resulting in the state shown in FIG. 3A. Then, the air spring 11 etc. are contracted and the vibrator 1
0 is lowered, the flask 13, etc. are also lowered, and the flask mounting plate 8 is placed on the guide rail 7 of the base 6, and the vibrator 10 is separated from the lower surface thereof. go. Then, the cylinder 9 is operated to move the flask 13 etc. backward, and the flask 13 etc. are positioned at the bottom outside the hopper 3 as shown in FIG. 2, and disappear onto the molding sand 14 filled in the flask 13. The state shown in FIG. 3B is reached, in which the model 15 made of foamed resin is placed. In this embodiment, after the model 15 is placed on the molding sand 14, the molding sand 14 is filled three times, so the first filling of the molding sand 14 is performed by first filling the cylinder 9 with the molding sand 14, contrary to the above. The flask 13 etc. are moved forward, and the flask 13 etc. are moved through the opening 2 of the hopper 3.
After positioning it at the bottom, move cylinder 5 in the same way as above.
is operated to move the lid 4 backward, the opening 2 of the hopper 3 is fully opened, and after a predetermined amount of molding sand 14 is allowed to flow down, the lid 4 is moved forward and the opening 2 is fully closed. Then, in the same manner as described above, the casting flask 13 with the top open is equipped with the vibrator 10.
When the molding sand 14 filled inside is compacted, the state shown in FIG. 3C is completed. In this way, the second and third filling operations with molding sand 14 are performed in the same manner, and when each is completed, the states shown in FIG. 3 D and E are obtained. Next, the cylinder 9 is operated to move the flask 13 etc. backward, and the flask 13 etc. are moved to the hopper 3.
After the casting flask 13 is placed in the lower part of the outside, a metal foil or thin metal plate 16 is provided on the upper surface of the flask 13, and the mold is sealed except for the sprue, as shown in FIG. 3. As a result, flask 1
The filling of molding sand 14 into 3 is completed. Thereafter, the flask 13 is transported from the flask mounting plate 8 to another location. In addition, instead of the three-time division described above, it is also possible to divide it into two times or fill it once.

"Embodiment" The drawing shows an embodiment of the present invention, in which 1 is a frame, on which a hopper 3 having a funnel-shaped opening 2 is installed;
A space A is formed on the lower surface of the . Reference numeral 4 denotes a lid body for opening and closing the opening 2 of the hopper 3, which is connected to a piston rod 5a of a cylinder 5 provided in the frame 1, and is moved forward and backward by the back and forth movement of the piston rod 5a. Reference numeral 6 denotes a base whose approximately half is located in the space A and whose rear approximately half is located outside the hopper 3. On both inner walls of this base 6, guide rails 7 made of trochanters or the like facing inward are provided. They are arranged to face each other, and a flask mounting plate 8 is provided between the guide rails 7 so as to be slidable (advanceable and retractable). 9 is a cylinder, and the piston rod 9 of this cylinder 9
A is connected to the flask mounting plate 8, and the flask mounting plate 8 moves forward and backward by the back and forth movement of this piston rod 9a. Reference numeral 10 denotes a vibrator installed between the bases 6 and below the opening 2 of the hopper 3, and is installed via an air spring 11, etc. When the air spring 11 contracts, the vibrator 10 moves to the flask mounting plate 8. The vibrator 10 moves up and down the flask plate 8 by the expansion and contraction of the air spring 11. The flask 13 placed on the flask mounting plate 8 and described later does not come into contact with the lid 4 even when the air spring 11 is fully extended. A flask 13 is placed on the flask mounting plate 8 and moves in the same manner as the flask mounting plate 8. In the figure, 14 is foundry sand, 15 is a fugitive foam resin model, and 16 is a metal foil or thin metal plate that seals the upper surface of the flask 1 except for the sprue.

"Effects of the Invention" Since the present invention has the structure described in detail above, it is possible to reliably and quickly fill foundry sand into a relatively large casting flask in which a large number of models can be buried using a simple mechanism. In particular, a vibrator is disposed at the bottom of the opening of the hopper, and this vibrator can be moved up and down, as well as being able to come into contact with and separate from the flask mounting plate, so it is possible to reliably apply vibration to the flask. The mechanism is said to be simplified and compact. Furthermore, the flask is located outside the hopper when carrying in the model, and is positioned at the bottom of the opening of the hopper when filling with molding sand, and the loading and unloading of the flask is a forward and backward movement. It can be expected to speed up loading and unloading and smooth work, and contribute to simplifying the mechanism and reducing costs. Furthermore, since vibration is applied to the flask with its top open through a vibrator, additional equipment for compacting the molding sand is not required, and an improvement in workability can be expected.
Also, since the hopper is configured to be fully open or fully closed,
Foundry sand can be smoothly supplied without crosslinking.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a schematic diagram showing the operating state. 1... Frame, 2... Opening, 3... Hopper, 4... Lid, 6... Base, 7... Guide rail, 8... Casting flask plate, 10... Vibrator, 13...
Casting flask, 14... Foundry sand, 15... Model.

Claims (1)

[Scope of utility model registration request] A hopper with an opening installed on a frame, a lid that fully opens and closes the opening of the hopper, a cylinder that controls the horizontal movement of the lid, and a small gap between the lid and the molding sand. A flask with an open top that is located at the bottom of the opening of the hopper during supply and located at the bottom outside the hopper when the fugitive foam resin model is carried in, a flask mounting plate on which this flask is placed, and a flask mounting plate on which this flask is placed. A base including a cylinder that controls sliding of the plate, a guide rail on which the flask mounting plate is mounted, and an upper surface of the flask provided between the base and under the opening of the hopper in an open state. A foundry sand filling device used in the full mold casting method, which consists of a vibrator that can be raised and lowered in an upright direction to apply vibration.