JPH04125045U - Foundry sand measuring hopper device - Google Patents

Abstract

(57) [Summary] [Purpose] To supply a predetermined amount of foundry sand without sand lumps into a casting flask. [Structure] An opening/closing mechanism 2 is provided near the middle of the square cylindrical hopper body 1, and a sand block crushing mechanism 21 is provided near the bottom. Grind at 21.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a molding sand measuring hop that supplies a predetermined amount of molding sand to the inside of the flask on the model plate. Concerning improvement of PA equipment.

0002

[Conventional technology]

Conventionally, the method of supplying a predetermined amount of molding sand to a casting flask on a model board was to feed it in the vertical direction. The so-called cast iron has a structure in which an opening/closing mechanism is installed at the lower end of the oriented square cylindrical hopper body. Sand weighing hopper equipment is used for transport.

0003

[Problem that the idea aims to solve]

However, with conventional foundry sand measuring hopper equipment, Since the molding sand is fed into the flask as it is, there are no sand lumps in the supplied molding sand. When molding sand is compressed to make a mold, a large amount of There were problems such as the formation of cavities and the induction of casting defects. The present invention has been made to solve the above problems.

0004

[Means to solve the problem]

In order to achieve the above purpose, the foundry sand measuring hopper device of the present invention has a square cylindrical hopper. A sand block crushing mechanism for crushing sand blocks is installed near the bottom of the main body, and this sand block crushing mechanism Multiple pairs of discs facing each other and rotatable in a vertical plane, and installed between the discs facing each other It consists of a rotating shaft and a round bar.

[0005]

[Effect]

While driving the sand crushing mechanism, open the opening/closing mechanism to drop the casting sand inside the hopper body. Then, the falling molding sand is crushed into lumps by the sand crushing mechanism and then poured into the casting flask. It will be supplied to

[0006]

【Example】

To explain the example based on the drawings, a model plate (not shown) on which a casting flask is placed. The hopper body 1, which is disposed so as to be able to move horizontally upward, is oriented vertically as shown in Fig. 1. It has a square cylindrical shape. There is an opening/closing machine inside the middle part of the hopper body 1. A mechanism 2 is provided, and in this opening/closing mechanism 2, when they are arranged close to each other on the left and right, Two support shafts that are parallel to each other and extend perpendicular to the front and rear inner surfaces of the hopper body 1 3, 3 is also from the support shafts 3, 3 at the same level as these two support shafts 3, 3. Two support shafts extending parallel to the support shafts 3 and 3 at positions separated by a predetermined distance in the left and right direction. 4, 4 are rotatably supported via bearings 5, 5, and are respectively penetrated ( (See Figure 3).

[0007] In addition, as shown in Figure 1, the ends of the support shafts 3, 3, 4, and 4 are provided with an upward angle of about 45 degrees. The ends of the first links 6, 6, which extend upwardly and downwardly respectively, are fitted, Between the other ends of the two first links 6, 6 on the left among these first links 6, 6, this The second link 7 is formed in such a way that the other ends thereof form the same distance as between the two ends. , are connected with pins and constructed. Further, at the right end of the second link 7, there is a link extending to the right. The left end of the third link 8 is connected with a pin, and the right end of the third link 8 has an inverted L shape. The upper end of the fourth link 9 is connected with a pin. This fourth link 9 includes the first link The two first links 6, 6 on the right side of the links 6, 6 connect the support shafts 3, 3, 4, 4. oriented in a direction line symmetrical to the left first links 6, 6 with respect to the center line, and As with the first links 6 and 6 on the left, make sure that the distance between the - end and the other end is the same. and are connected by pins at their other ends.

[0008] Furthermore, the right end of the fifth link 10 extending leftward is located at the lower end of the fourth link 9. At the left end of the fifth link 10 is a sixth link having the same length as the first link 6. The distal end of the sixth link 11 is connected with a pin, and the base end of the sixth link 11 is connected to the support It is fitted to the other end of the drive shaft 12 which is oriented in the same direction as the shafts 3 and 4, and the drive shaft 12 is attached to the hopper body 1 via bearings 13, 13 and bracket 14. . In addition, a downward cylinder 15 is attached to a bracket 16 on the left outer surface of the hopper body 1. The lower end of the piston rod of the cylinder 15 is connected to a drive link (not shown). The drive shaft 12 is connected to the drive shaft 12 via the drive shaft 12.

[0009] Moreover, as shown in FIG. 2, the bottom of the hopper body 1 is attached to the support shafts 3, 3, 4, 4. The two pairs of plates 17, 17, 18, and 18 that make up the structure are fixed on the - side, and these four plates The plates 17, 17, 18, 18 are arranged so that the first links 6, 6 are in the state shown in FIG. When the hopper body 1 is tilted approximately 45 degrees to It is configured to be chained. Also, below the opening/closing mechanism 2 in the hopper main body 1, A sand block crushing mechanism 19 for crushing sand blocks is installed in the opposite position. 19, as shown in FIG. The rotating shaft 20 facing toward the The bearings 24, 24 are supported at both ends via a bracket 25. It is attached to the outer surface of the hopper body 1 through the First chain gears 26, 26 are fitted to the ends, respectively.

0010 Moreover, as shown in FIG. A motor 27 is installed, and a second chain gear 28 is fitted to the output shaft of the motor 27. An endless roller chain 29 is a guide chain gear between the first and second chain gears 26, 26, and 28. 30, 31, and 32, it extends up and down in a wavy manner. Also, in Figure 2 As shown, two round bars 33, 33 are provided between the circumferences of the respective discs 21, 21. It is constructed with the rotating shaft 20 in between. As a result, the rotating shaft 20 and the round bar 3 3 and 33 are rotated in the direction shown by the arrow in FIG. 2 by the drive of the motor 27. It looks like this. Note that 34 is a cover.

[0011] Next, the operation of the device configured in this way will be explained. Drive motor 27 and move the rotating shafts 20, 20 and round bars 33, 33 in the direction shown by the arrow in FIG. In this state, the cylinder 15 is extended to drive the sixth link 11. Rotate approximately 90 degrees clockwise around the moving shaft 12, and set the sixth link 11 at two points. Set it to the state shown by the chain line. Then, as the sixth link 11 rotates, the fifth link 10 Then, the fourth link 9 is rotated to the left while moving up and down a slight distance once, and the two links on the right side are The first links 6, 6 move approximately 90 degrees clockwise around the two right support shafts 3, 4. at the same time as moving the fifth link 10 and the fourth link 9 to the left. Then, the third link 8 and the second link 7 are also moved to the left while slightly moving up and down once. The two first links 6, 6 on the left rotate counterclockwise around the two support shafts 3, 4 on the left. The plates 17, 17 and 18, 18 are rotated approximately 90 degrees in the rotational direction, and accordingly, the plates 17, 17 and 18, 18 are 2, the hopper body 1 is rotated inwardly and downwardly as shown by the two-dot chain line. The bottom is opened.

0012 In this way, when the plates 17, 17, 18, 18 are rotated inwardly and downwardly, the hopper main body The molding sand in the hopper body 1 falls to the lower central part of the hopper body 1 in a slightly flowing manner. The falling foundry sand is crushed by the rotating shafts 20, 20 of the rotating sand block crushing mechanism 19 and the round bar 3. 3, the sand block is crushed by 33. As a result, the casting flask contains molding sand without sand lumps. is poured into the flask to form a gentle mountain with the top at the center of the flask. -It will be supplied at various heights. Note that the opening/closing mechanism 2 described above is not limited to this, and the opening/closing mechanism 2 described above is not limited to this. Of course, any structure may be used as long as the part can be opened and closed.

[0013]

[Effect of the idea]

As is clear from the above explanation, the present invention is designed so that two A rotating shaft and a round bar are installed between two discs that can be rotated in a vertical plane. Since we have installed a sand block crushing mechanism consisting of multiple structures, there will be no sand blocks in the flask. This makes it possible to supply molding sand with high quality and prevent molding defects from occurring. Which has excellent practical effects.

[Brief explanation of drawings]

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

FIG. 2 is a longitudinal cross-sectional view of FIG. 1;

FIG. 3 is an enlarged cross-sectional view taken along line AA in FIG. 1;

[Explanation of symbols]

1 Hopper body 2 Opening/closing mechanism 19 Sand block crushing mechanism 20 Rotation axis 21 Disk 33 Round bar

Claims (1)

[Scope of utility model registration request] 1. A molding sand measuring hopper device for supplying a predetermined amount of molding sand into the inside of a molding flask on a model plate, wherein an opening/closing mechanism 2 is provided near the middle of a rectangular cylindrical hopper body 1 oriented in the vertical direction. Further, a sand block crushing mechanism 19 is provided near the lower stage of the hopper main body 1, and a plurality of sand block crushing mechanisms 19 are arranged to face each other at a required interval and are rotatable in a vertical plane. A foundry sand measuring hopper device comprising a pair of discs 21, 21, a rotating shaft 20 and round bars 33, 33 installed between the discs 21, 21 facing each other.