JPH03281037A - Method for conveying mold in vertical type flaskless casting equipment - Google Patents

Abstract

PURPOSE:To prevent opening between molds caused by pouring molten metal and to improve producing efficiency of castings by laying a weight so as to be in contact with at least neighborhood of bottom face in the mold in front face of the mold at the most front end or back face of the mold at the most back end arranged in mutually close contact on a conveying table. CONSTITUTION:At the front face of mold 5 at the most front or the back face of mold 5 at the most back end in the line of molds 5 mutually brought into close contact and continuously conveyed toward the arrow mark on the conveying table 6, the weight 20 is laid on the conveying table 6 so as to be in contact with the position 5b or 5c at the neighborhood of bottom face of the mold 5. By this method, frictional force at between the bottom face of weight 20 and the conveying table 6 prevents opening between the molds 5 against force to make opening between the molds 5 caused by pouring the molten metal and even the conveyed mold 5 in the neighborhood at the most front end or at the most back end can be poured with molten metal and the mold 5 for which pouring the molten metal is impossible does not exist. Then, the weight 20 is fitted with a member 20a having large coefficient of friction at the bottom face and the bottom sides (a), (b) are made longer than the upper sides (c), (d), respectively and further, position of hanging part 20b is shifted from the center line E, E of gravity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for transporting molds in vertical frameless casting equipment.

[Conventional technology]

As shown in Fig. 4, the main parts of the vertical frameless casting equipment are shown schematically in Figure 4.
One side of the mold cavity 5a is formed on the surface on the conveyance direction side shown by the arrow) and the rear surface (on the side opposite to the I!1 conveyance direction), respectively, and a frameless mold 5 containing a core if necessary is formed. A mold is formed and sequentially sent to a mold matching zone 2, and in this mold matching zone 2, the rear surface of the mold 5 sent out first and the front surface of the mold 5 sent out later are brought into close contact to form a mold cavity 5a that becomes a cast product. Perform the alignment sequentially.

Next, in the molten metal pouring zone 3, molten metal is poured into the mold cavities 5a of a large number of molds 5 that have been conveyed in close contact with each other by a conveying mechanism to be described later, through a molten pouring device (not shown). ,
The mold 5 after pouring is further sent to a cooling zone 4, cooled on a belt conveyor 4a, and sent to a subsequent process such as a mold release device (not shown).

As described above, according to the vertical frameless casting equipment, the mold 5 is divided vertically and brought into close contact with each other, mold cavities 5a are sequentially and continuously formed on both the front and rear surfaces, and the mold cavities 5a are poured with metal to produce the cast product. Compared to casting using conventional horizontally split molds, castings can be manufactured more efficiently with less equipment space, and since no casting flasks are required, cleaning and transporting the flasks are easier. This can greatly reduce the amount of effort required to handle such items.

For this reason, this equipment has become increasingly popular in recent years.

Therefore, in order to convey the mold 5 between the mold matching zone 2 and the pouring zone 3 in the vertical frameless casting equipment, the fifth
As shown in the figure, a conveying table 6 is formed by arranging every other fixed rail 7 and movable rail 8 in the vertical direction (the direction in which the mold 5 is conveyed), and when the movable rail 8 is stationary, both rails are Make sure the top surfaces of the 7°8 are on the same plane. The moving rail 8 moves up and down at this position, and moves forward and backward at the up and down position to sequentially transport the molds (
For example, see Equity No. 50-39609).

That is, when the air cylinder 9 pushes out the loft lO and slightly raises the eccentric shaft 12 via the arm 1), the mold 5 rises on the movable rail 8 and moves up to the fixed rail 7.
rises from the top of the Next, when the rod 14 is pushed out by the air cylinder 13, the support member 15 supporting the moving rail 8 rolls on the roller 16 fitted to the eccentric shaft 12 and moves forward a predetermined distance, thereby moving the mold 5 forward together with the moving rail 8. .

Once the mold 5 has advanced a predetermined distance, the air cylinder 9
retracts the rod 10 and lowers the eccentric shaft 12 via the arm 1) to its original position or below. As the eccentric shaft 12 descends, the movable rail 8 also descends, and the mold 5 rides on the upper surface of the fixed rail 7 and stops.

Note that the mold 5 manufactured in the molding zone 1 is sent out so that it is matched with the mold 5 previously molded and placed on the conveyance table 6 in the mold matching zone 2 with an appropriate degree of closeness. The forward distance of the moving rail 8, that is, the distance that the mold 5 is conveyed at one time, corresponds to the distance that the mold 5 is sent out from the molding zone 1.

Molten metal is poured in the pouring zone 3 into the molds 5 which have been matched with appropriate adhesion as described above and are successively sent to the pouring zone 3 in close contact with each other.

(Problems to be Solved by the Invention) As described above, each mold 5 is continuously conveyed with its front and rear surfaces in close contact with each other, and is poured in a stationary state in the pouring zone 3.

During pouring, the mold 5 is held stationary from the horizontal direction by a pressing plate 18 via a pressing mechanism 17 as shown in FIG. 5, but is held in the vertical direction where the molds 5 are in close contact The force that tends to open the molds 5 due to pouring is counteracted by the frictional force between the bottom surfaces of the molds 5 and the top surface of the conveyance table 6, which are lined up one after the other.

Therefore, it is necessary that the number of molds 5 that generate the above-mentioned frictional force be lined up in front and behind the mold cavity 5a in the vertical direction into which the mold cavity 5a is to be poured.

Therefore, after the start of molding, the metal can only be poured into the molds 5 after the above number of molds 5 are lined up, and when the molding is finished, the metal can only be poured into the molds 5 before the above number of molds 5 are lined up. If it opens, it will cause hot water leakage). In particular, if the last few molds are left on the transport table 6 until the next operation, the moisture in the molds will cause the molds and rails to stick together, making it difficult to transport the molds again when starting work. It is necessary to completely remove the rail from the top of the transport table 6 after the work is completed.

As a result, the mold cannot be poured at the start or end of molding, resulting in wasted molds that require time and effort to remove, which impedes the production efficiency of castings.

The object of the present invention is to eliminate molds that cannot be poured into, and to improve the production efficiency of castings.

[Means to solve the problem]

The present invention has been made as a result of various studies to achieve the above object, and consists of forming a mold transport table by alternately arranging fixed rails and movable rails at appropriate intervals, and moving the movable rails up and down. Make it move and make it reciprocate,
In a method of transporting molds in a vertical frameless casting facility, in which molds arranged in close contact with each other are transported on the transport table, the molds are placed on the transport table in front of the most advanced mold arranged in the array, or on the rear face of the last mold in the array. , a weight is placed at least in contact with the vicinity of the bottom surface of the mold.

In addition, the weight used in the above method may have a member with a large friction coefficient attached to the bottom, the bottom may be longer than the top, or the position of the hanging portion may be slightly offset from the center of gravity. It is.

[Effect]

Since a weight is placed in front of the most advanced mold being transported, the frictional force between this weight and the transport table counteracts the force of the mold opening due to pouring and prevents the mold from opening. prevent.

The same thing applies when a weight is placed after the last one.

Therefore, it is possible to pour metal into all of the molds that have been made, eliminating unnecessary molds and improving the production efficiency of castings.

Further, by attaching a member having a large friction coefficient to the bottom surface of the weight used in the present invention, the frictional force can be increased and the weight can be made smaller and easier to handle.

Furthermore, by making the bottom side longer than the top side, it is ensured that it comes into contact with the vicinity of the bottom surface of the leading or trailing mold, thereby ensuring the transmission of frictional force.

Furthermore, by slightly shifting the position of the hanging part from the center of gravity, when it is placed on the conveyance table, it hangs diagonally and makes strong contact with the vicinity of the bottom of the mold. It is easy to do.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to FIGS. 1 to 3.

Figure 1 is a front view showing a state in which a mold is transported with a weight placed at the leading edge, Figure 2 is a front view showing a state in which a mold is transported with a weight placed at the rear end, and Figure 3 The figure is a perspective view showing an example of a weight.

(Example 1) In FIG. 1, conveyance of the front surface of the most advanced mold 5 in a row of molds 5 that are successively conveyed in close contact with each other toward the forward direction (left direction in the figure) on the conveyance table 6. table 6
A weight 20 was placed on top of the mold 5 in contact with a position 5b near the bottom surface.

By doing this, the bottom of the weight 20 and the transport table 6
The frictional force between the molten metal and the mold 5 prevents the mold 5 from opening against the force that causes the mold 5 to open due to pouring, and the molten metal can also be poured into the mold 5 near the tip of the conveyed mold. It was possible to eliminate the useless mold 5 that could not be heated.

(Example 2) In FIG. 2, facing forward on the transport table 6,
A weight 20 was placed on the conveyance table 6 on the rear surface of the last mold 5 in a row of molds 5 that were continuously conveyed in close contact with each other, in contact with a position 5C near the bottom surface of the mold 5.

By doing this, the bottom of the weight 20 and the transport table 6
The frictional force between the molds 5 and 5 prevents the molds 5 from opening against the force that the molds 5 try to open due to pouring, and the molds 5 near the rear end
It is possible to pour molten metal into the mold, thereby eliminating unnecessary molds 5 that cannot be filled with molten metal, and also saving the trouble of removing them from the conveying table 20 at the end of molding.

The weight 20 used in Examples 1 and 2 above was the third
It was as shown in the figure.

That is, first, a member 20a made of a material having a large coefficient of friction, such as rubber, was attached to the bottom surface of the device to increase the frictional force. However, if the frictional force can be increased by other means (for example, by forming a rough surface), the mounting of the member 20a can be omitted.

Next, the vertical and horizontal lengths a and b of the bottom side, and the vertical and horizontal lengths of the top side c
, d, respectively, to form a trapezoidal shape so as to surely contact the position 5b or 5c near the bottom of the mold 5.

However, it is not necessarily trapezoidal (it may also be cubic or rectangular).

Furthermore, the position of the assembled portion 21b was slightly shifted by the dimension C from the center of gravity line E-E. By doing this, in the case of Fig. 1, when it is lifted, it tilts to the left and the left side of the bottom is first placed on the transfer table 6, and the right side of the bottom is strongly placed on the mold 56 F!
5b. Incidentally, in the case of FIG. 2, the situation is reversed and the same operation and effect are exhibited.

〔Effect of the invention〕

As described above, according to the present invention, the production efficiency of castings can be improved by eliminating molds that cannot be poured.

[Brief explanation of drawings]

Fig. 1 is a front view of main parts showing one embodiment of the present invention, Fig. 2 is a front view of main parts showing another embodiment, Fig. 3 is a perspective view showing an example of a weight, and Fig. 4 is a vertical view. FIG. 5 is a front view of the main parts showing an example of frameless casting equipment, and FIG. 5 is a sectional view taken along line AA in FIG. 4. : Mold, : Transfer table, : Fixed rail, : Moving rail, 20: Weight, 20a two parts, 20b: Assembly department agent

Claims (4)

[Claims] (1) Fixed rails and movable rails are arranged alternately at appropriate intervals to form a mold conveyance table, and the movable rails are moved up and down and reciprocated so that they are brought into close contact with each other on the conveyance table. In a method for transporting molds in vertical frameless casting equipment that transports molds arranged in
A mold in a vertical frameless casting equipment, characterized in that a weight is placed on the conveying table on the front surface of the most advanced mold arrayed or on the rear surface of the rearmost mold, in contact with at least the vicinity of the bottom surface of the mold. Transportation method. (2) A method for transporting a mold in a vertical frameless casting facility according to claim 1, wherein a member having a large friction coefficient is attached to the bottom of the weight, and the weight is used. (3) The method for transporting a mold in a vertical frameless casting facility according to claim 1 or 2, in which a weight whose bottom side is longer than its top side is used. (4) The method for transporting a mold in a vertical frameless casting facility according to any one of claims 1 to 3, using a weight whose hanging portion is slightly shifted from the center of gravity.