JPS6167564A - Molten metal pouring device for casting and casting method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Background of the Invention The present invention involves the production of gold PAg articles by holding a casting mold filled with molten metal and simultaneously moving the molten metal-filled mold to a pouring station. This is related to the pouring equipment and the casting process that move to this pouring station.

In the production of cast articles such as railway wheels, cost reduction and energy savings are achieved from the standpoint of rapid wheel production, while at the same time
It is important to maintain the precision required for the final product. A typical wheel casting plant layout is described in U.S. Pat. No. 2,999,281.

The upper mold, or upper mold part, is placed over the lower mold, or lower hammer part, to form a complete mold. usually.

This mold is a reusable graphite mold. When this mold is moved along a conveyor to a pick-up station adjacent to the pouring station, the mold is lifted up by a pick-up crane and then moved to the pouring station above the pouring tank. Molten metal is poured into this mold. Since the bottom pouring method is used to do this, the mold is placed at the top of the pouring tank.

The ladle containing 9f of melt is placed in the molten metal tank. Air pressure is applied to the pouring tank, and the molten metal rises through a refractory press-fit tube to the bottom of the mold.

Prior to mold light filling, the mold must typically be held in place by an air cylinder extending downwardly into contact with the upper mold. In addition, it is necessary to lower the @-type stopper device using a full air cylinder and place the stopper above the stopper hole in the mold. Finally, the feeder height control mechanism is lowered into the feeder to determine the height of the molten metal within the feeder and automatically control the pouring operation. The mechanism of these three buildings.

That is, the mold holding air cylinder, mold stopper and feeder height control mechanism are conventionally used for filling molds.

This is installed on the leg of the mold unloading crane used to move the mold to the foundry unloading station, and the caster is moved to this unloading station.

From here, the next process continued along the conveyor.
The pillow device is configured as a pillow device with two legs, and these pillow devices are mounted on a top frame device. This top frame arrangement moves along an auxiliary girder, which itself includes a crane arrangement mounted on the main girder, which provides the auxiliary girder with a pouring station and longitudinal monopolization. Since both the lifting and lowering cranes are mounted on one top frame arrangement, the lateral movements along these auxiliary girders to and from the auxiliary girders occur simultaneously and with equal lateral distances.

During a series of pours in conventional equipment, the bath water filled mold is located at the pouring station, and another mold is placed in the pouring station.

That is, Karasaki Present is at the pick-up station. The cast-hole holding device, mold stopper, and feeder height control mechanism are attached to a lowering crane, and lifted out of the mold after pouring is completed. The unloading crane then lifts the filling mold, and at the same time lifts the mold from the unloading crane. The frame devices supporting both cranes are moved laterally along the auxiliary girders. This charge iiB? The n-type is placed at the unloading station by the unloading crane, and the empty casting 5 is moved to the pouring station by the unloading crane. The take-down crane and pick-up crane are then moved laterally along the auxiliary girder by means of a frame device. When the crane reaches the pouring station, it is lowered into the mold through the mold holding device and feeder height control mechanism to begin pouring. The mold stopper is lowered after filling the mold.

It is an object of the present invention to provide an improved mold handling apparatus at a pouring station.

SUMMARY OF THE INVENTION The present invention provides an improved mold pourer for use in bottom pour casting operations.

In the pouring device of the present invention, the mold filled with molten metal is moved from the pouring station by the unloading crane after the mold holding device, the mold stopper, and the riser height control mechanism are lifted from the mold. The filled mold is moved from the pouring station by a take-down crane, and at the same time the empty mold is moved to the pour station by a pick-up crane. However, the mold presser holding device.

The mold stopper and feeder height control device are not attached to the lowering crane, but are instead attached to the auxiliary girder. Therefore, at the same time as the caster reaches the pouring station, the @ mold retainer, the mold stopper and the riser height control mechanism are lowered onto the mold. The pouring operation can be started before the crane returns to the pouring station, saving approximately 8 seconds per casting, resulting in a 1.00% reduction in 24 hours.
At Granoto, which makes 0 castings, it takes about 1.100 in 24 hours.
In other words, production can be increased by 10 pieces.

More particularly, the present invention provides an improved pouring apparatus for use in the manufacture of cast metal articles, which apparatus includes a mold transfer apparatus including a top frame and two sets of downward legs, and a bridge structure. The top frame is adapted to move along the bridge structure.1 The apparatus of the present invention further includes a pouring tank Kanakura-mi, which includes a ladle and from which the molten metal rises under pressure. , the pouring tank is located at a pouring station below the bridge structure,
One set of downward legs of the mold transfer device is adapted to move the mold from the pick-up station to the pouring station, and another set of downward legs of the mold transfer device is adapted to simultaneously pour the filling gate mold. The bridge structure is adapted to move from the hot water station to the unloading station, and the bridge structure includes an apparatus for holding the mold at the pouring station and then starting filling the mold immediately after the mold reaches the pouring station. There is.

The present invention also includes: It provides a manufacturing method for copper-made Kinku products.
This method includes the steps of moving a mold filled with bathwater from a pouring station to an unloading station, and simultaneously moving the mold from a pick-up station to a pouring station.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pouring station and mold pouring apparatus are shown in FIGS. The mold 10 is located above the pouring tank 12 in the center of the pouring station and is connected to the pouring tank 12 by a refractory pouring pipe 14 . The mold 10 is composed of an upper mold 16 and a lower plate 18. Typically, this mold is a permanent mold that utilizes compressed graphite as the refractory material.

The unloading crane 19 has a front downward leg 20 and a rear downward leg (not shown), and the pick-up crane 25 has a front downward leg 12,2 and a rear downward leg 62. All of these downward legs are supported by the top frame mounting [24]. Lower part 21 of the front downward leg 20 of the unloading crane. and posterior downward leg (
(not shown) as well as the lower part 23 of the forward downward leg 22 of the pick-up crane. and the lower part 64 of the rear downward leg 62 is a movable part supported by compressed air cylinders 50 and 51 within each crane. The pair of the lower part 21 of the crane 19 and a lower part (not shown) and the pair of the lower parts 23 and 64 of the crane 25 cooperate to contact the mold 10 and pull it up. The top frame device 24 is a beam structure,
It can be moved laterally across the intermediate support girder 2G.

The guide 26 can be moved vertically on the rail 28.30.

Below the intermediate support girder 26 are presser foot holding cylinders 32 and 34, usually of the compressed air piston cylinder type. Similarly, mold stops 36. are typically of the compressed air piston cylinder type.
and a feeder height control mechanism 38 are attached. This refractory stopper 36 is typically mounted within the mold and is not connected to the air cylinder. The feeder height control mechanism 38 can be of various types, but usually extends into the mold feeder and generates a signal to stop pouring the molten metal when it detects that the molten metal has reached a predetermined height. do.

As the frame assembly 24 moves to the right in FIG. 1, the unloading crane 19 aligns with the mold at the pouring station.

The filling mold 10 is attached to the front downward leg 20 of the unloading crane 19.
It will be featured in At the same time, the picking crane 25 reaches the mold picking station 40 and picks up the mold from this position. As the top frame apparatus moves to the left, the filled oven is lowered to the mold unloading station 42. At the same time, the pick-up crane 25 lowers the mold from the pouring station. Presser foot holding cylinders 32 and 34. Then, the riser height control mechanism 3B is lowered to the mold, and pouring of the molten metal is started. After filling the mold, the mold stopper 36 is lowered.

During this time, the top frame device 24 moves to the right,
The unloading crane 19 lifts up the filled mold of the pouring bath, and the unloading crane 25 prepares to pull up the mold from the unloading station.

Two auxiliary presser foot holding cylinders 52 and 53 are attached to the lowering crane front downward leg 20 and rear downward leg (not shown).

These auxiliary cylinders are typically of the compressed air piston cylinder type. These auxiliary cylinders are used to keep the filled mold closed while being moved from the pouring station 12 to the withdrawal station 42.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of the mold pouring device of the present invention.
FIG. 2 is a side view taken along line 2--2 in FIG. 1. lO...Casting target, 12...Pouring tank, 14...Pouring pipe. 16...Upper die, 18...Lower die, 19...Unloading crane. 24... Top frame device, 25... Picking up crane. 26... Intermediate support girder, 32.34... Presser holding cylinder.

Claims (1)

[Claims] 1. A pouring device for casting: a mold transfer device having a top frame and two sets of downward legs; a bridge structure in which the top frame moves in parallel; a pouring tank pressurized to allow molten metal to be poured upwardly from the base and located at a pouring station below the bridge structure; Move the mold from the pick-up station to the pouring station above,
Another set of downward legs of the mold transfer device is adapted to simultaneously move the filled mold from the pouring station to the withdrawal station; A pouring apparatus including a device for holding a mold at a pouring station so that filling of the mold with melt begins. 2. The pouring device according to item 1 above, wherein the top frame of the transfer device is mounted on a bridge structure and is adapted to move along the bridge structure. 3. The pouring device according to item 1 above, wherein the bridge structure further includes a mold stopper closing mechanism. 4. The pouring device according to item 1 above, wherein the bridge structure further includes a feeder height control mechanism. 5. The pouring device of item 1 above, wherein each set of downward legs includes a pick-up cylinder for raising the mold. 6. The apparatus of claim 1, wherein the device for holding the mold in the pouring station includes two air cylinders extending downwardly into contact with the mold. 7. A pouring device according to item 3 above, in which the mold stopper is mounted on an air cylinder that extends downwardly to contact the mold. 8. The pouring device according to claim 1, wherein the downward leg that moves the filled mold to the unloading station has an auxiliary air cylinder that closes the filled mold during transfer. 9. A method for manufacturing a cast article, including the step of moving a mold filled with molten metal from a pouring station to a withdrawal station, and simultaneously moving the mold from a pick-up station to a pouring station, and holding the mold in the pouring station. A casting method comprising the steps of: inserting a riser height control mechanism into the mold; filling the mold with molten metal; and closing a stopper in the mold. 10. The casting method according to item 9 above, in which the mold is moved from the filled mold by the same moving frame device. 11. The casting method according to item 9 above, in which the molten metal is pressure-injected into the bottom of the mold.