JP3139621B2 - Separation device for molding sand of hollow frame. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating molding sand from a casting mold for extracting a casting part from a poured mold with a frame and separating the casting part into a casting sand and a casting.

[0002]

2. Description of the Related Art Conventionally, as a method of disintegrating a casting mold having been poured into a casting and separating it into castings and molding sand, a casting mold is put into a vibrating sieve having a bottom surface formed in a lattice, The shaping mold is moved while being vibrated to crush it, and the crushed molding sand is dropped from the grid, and the casting is discharged from the tip of the vibrating sieve.

[0003]

However, the above-mentioned crushing and separation of the blanking mold by the vibrating sieving machine described above requires a short period of time when the ratio of molding sand to the casting (sand metal ratio) is different.
Insufficient sand removal or excessive sand removal from the vibrating sieve increases the amount of casting sand taken out together with the castings, or causes the castings to directly hit the grid and form dents, causing cracks in the castings. there were. In the long term, the sand properties of the foundry sand changed, and the state of sand removal from the vibrating sieve changed due to changes in the mold strength and the like, causing the same problems as described above. To deal with these problems, the vibration force of the vibration motor of the vibration sieving machine is adjusted to adjust the vibration force, etc., but the adjustment width is small and the adjustment is limited,
It was not a fundamental measure. The present invention has been made in view of the above-described problems, and has an apparatus for separating molding sand from a molding die for forming a proper molding sand even when the sand metal ratio of the molding die or the sand property of the molding sand changes. The purpose is to provide.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a molding sand separating apparatus for a framed mold according to the present invention comprises a mold removing machine arranged below a conveying line of a poured mold with a frame. At the upper part corresponding to the mold unloading machine in the transfer line, a horizontal feeder that extrudes and moves the blanking mold in a direction crossing the traveling direction of the transfer line is provided, and at the lower part of the horizontal feeder, A vibrating sieve provided with a first lattice having a large opening on the upstream side and a second lattice having a small opening on the downstream side is arranged so as to be able to reciprocate in a direction intersecting the pushing direction of the horizontal delivery machine. A vibrating conveyer having a transfer surface longer than a moving distance of the vibrating sieve is disposed below the sand chute. .

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. In FIGS. 1 to 3, a mold removing machine 2 is disposed below the conveying line 1 of the poured mold with a frame, and the mold removing machine 2 is a punch-out machine connected to a piston rod of a lift cylinder 3. Head 4
It is composed of (Refer to FIGS. 2 and 3.) Further, an upper frame corresponding to the mold removing machine 2 in the transfer line 1 is provided with a guide trough 7 in which a pusher cylinder 6 having an extruded plate 5 attached to the tip is housed. A horizontal feeder 8 for the mold M is arranged in a direction intersecting the transfer line 1.

[0006] At the lower end of the horizontal sending machine 8 is a frame 9
Is provided on the pedestal 9, and a number of rollers 10, 1
Numerals 0 are arranged at appropriate intervals in a direction intersecting with the direction of the horizontal transmitter 8. (See FIG. 2) A movable platen body 12 that is connected to a cylinder 11 provided on the gantry 9 and reciprocates is mounted on the rollers 10.

The movable platen body 12 has a large opening
A vibrating sieve 15 provided with one grid 13 on the upstream side and a second grid 14 with a small opening on the downstream side at a height level lower than the height level of the first grid 13 is provided by the horizontal feeder. 8 are arranged in a direction intersecting with the feeding direction of No. 8. The first and second grids 13 and 14 of the vibrating sieve 15
The lower part is located on an upper part of a vibrating conveyor 17 which is constituted by a sand chute 16 and has a transfer surface longer than the moving distance of the vibrating sieve 15 and the vibrating conveyor 17
Is disposed facing the upper part of the sand recovery conveyor 18. A chute 15A is connected to the lower end of the vibrating sieve 15 and an apron conveyor 19 having a horizontal feed surface longer than the moving distance of the vibrating sieve 15 is provided below the chute 15A. It is arranged in a state capable of responding to the movement of the machine 15.

The reason why the second grid 14 is set at a level lower than the height level of the first grid 13 is that
It is intended to prevent the connection at the connection portion between the second lattice 14 and the second lattice 14, and when the shape of the casting does not bite, there is no need to change the level.

When the casting material is smaller than the amount of molding sand in the poured framed mold sent to the transfer line 1 as shown in FIG. 1 and FIG. When the cylinder 11 is extended, the vibrating sieve 15 is advanced on the rollers 10 and 10 together with the moving platen so that the tip of the horizontal feeder 8 is moved to the start end of the vibrating sieve 15 (above the first grid 13). ). In this state, when the poured mold with the frame is moved above the mold removing machine 2, the mold removing machine 2 is operated to remove the sand mold from the flask and send out the blanking mold M horizontally. After being positioned in front of the extruding plate 5 of the machine 8, the pusher cylinder 6 is operated to drop the blanking mold M through the extruding plate 5 onto the first grid 13 of the vibrating screen 15.

[0010] Here, the frameless mold M that has dropped falls into the first lattice 13 where the opening is large, the sand mold is crushed, and a large amount of molding sand is dropped below the first lattice 13 while opening the opening. The casting is moved to the small second lattice 14 and the casting sand is gradually dropped and removed, while the casting is discharged from the tip of the vibrating sieve 15 to the apron conveyor 19 via the chute 15A. The casting sand separated and dropped by the first and second lattices 13 and 14 is then passed through a sand chute 16 to a vibration conveyor 17.
And sent to the sand collection conveyor 18 to be collected.

[0011] Next, in the poured mold with a frame, when information is given that the casting material is large relative to the amount of molding sand, or that the sand properties have changed and the disintegration of the sand mold has been improved, etc. The vibrating sieving machine 15 is retracted on the rollers 10 and 10 together with the movable platen body 12 so that the tip of the horizontal delivery machine 8 is moved to the second position of the vibrating sieving machine 15 as shown in the solid line of FIG. It is placed above the lattice 14. In this state, the molding die M is extracted in the same manner as described above by the die lifting machine 2, and the molding die M is extruded by the horizontal feeder 8 and dropped onto a predetermined position above the vibrating sieve 15.

The moving position of the vibrating sieve 15 can be changed in correspondence with the horizontal feeder 8 in accordance with the content of the information. The horizontal feeder 8 corresponds to the position closer to the first grid 13 as the amount of sand increases, and to the position closer to the left side of the second lattice 14 as the speed of dropping out increases or the amount of sand decreases. Can be Therefore, the blanking mold M is properly put into an appropriate position of the vibration sieving machine 15 in accordance with the content of the information, and is separated into a casting sand and a casting.
8 or collected by the apron conveyor 19. For this reason, it is possible to minimize the amount of casting sand taken out without causing dents or cracks in the casting.

[0013]

As is apparent from the above description, the present invention provides a mold removing machine for removing a sand mold from a poured mold with a frame, and a horizontal dispensing machine for delivering the removed frameless mold. A first lattice having a large opening and a second lattice having a small opening, which are provided below the tip of the horizontal dispenser and are reciprocally movable in a direction intersecting the pushing direction of the horizontal dispenser. Since the vibrating sieve comprises a vibrating sieve, and a vibrating conveyor disposed below the vibrating sieve and having a transfer surface longer than the moving distance of the vibrating sieve, the frameless mold has a sand metal ratio or Depending on the content of various information such as sand properties, it is put into the appropriate position of the vibrating sieve so that the sand can be properly separated, preventing the occurrence of dents and cracks in the casting and the amount of casting sand taken out Can also be minimized .

[Brief description of the drawings]

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

FIG. 2 is a front view showing the embodiment of the present invention.

FIG. 3 is a left side view in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveying line 2 Mold removal machine 8 Horizontal dispenser 10 Roller cylinder Moving surface plate 1st lattice 2nd lattice Vibrating sieve Sand chute Vibrating conveyor M

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Claims (2)

(57) [Claims] 1. A mold removal machine 2 is disposed below a transfer line 1 for a mold with a poured frame, and the transfer line 1
In the upper part corresponding to the mold removing machine 2 in the above, a horizontal delivery machine 8 for extruding and moving the blanking mold M in a direction intersecting with the traveling direction of the transport line 1 is arranged, and a lower part of the horizontal delivery machine 8 is provided. In addition, a vibrating sieve 15 provided with a first lattice 13 having a large opening on the upstream side and a second lattice 14 having a small opening on the downstream side is moved in a direction intersecting the extrusion direction of the horizontal delivery machine 8. A vibrating conveyor 17 having a transfer surface longer than a moving distance of the vibrating sieve 15 is provided at a lower portion of the vibrating sieve 16 which is disposed so as to be capable of reciprocating movement, and a lower portion of the vibrating sieve 15 is formed as a sand chute 16. An apparatus for removing molding sand from an undermolding mold, which is provided. 2. The frameless mold according to claim 1, wherein said vibrating sieve 15 has a height level of said second grid 14 lower than a height level of said first grid 13. Foundry sand separator.