JPS6077014A - Vibration conveyor - Google Patents

Abstract

PURPOSE:To prevent return sand from being adhered to a trough due to formation of dew, by a method wherein a vibration conveyor for return sand in a casting process is constituted such that sand adhered to a pouring gate sprue runner is dropped onto a diffusion plate, attached to the start terminal part of the vibration conveyor, by means of a conveyor for hot return sand. CONSTITUTION:A high temperature pouring gate sprue runner 7, to which mold sand is adhered, is conveyed to a separating grade 22 through conveyors 10 and 11 for pouring gate sprue runner, and mold sand is separated thereat. Return sand is moved in the direction of an arrow mark (D) and is dropped onto a start part 9a of a vibration conveyor 9 for return sand through a conveyor 23 for return sand, the mold sand being uniformly disposed to a trough 9a with the aid of a dispersing plate 24. The trough 9a is heated by the dropped heat return sand. This prevents formation of dew on the trough 9a and the occurrence of impedance to conveyance due to adhesion of return sand.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention uniformly distributes hot return sand to the conveyor belt 27 in order to prevent condensation and condensation on the return sand river vibrating conveyor. This invention relates to a vibrating conveyor that allows the flow to flow.

Generally, in a casting process, a mold formed by a molding machine is poured into a mold from a ladle or the like in a pouring process, and then transported to a demolding process via a cooling line. Here, the casting is separated from the mold sand by various methods and taken out and transported, while the separated mold sand is reused as return sand.
In order to do so, the sand is returned to a tank, etc. and transported via a moving conveyor, etc.

As a conventional conveyor for such return sand, there is one as shown in Figures 1 and 2, for example.

FIG. 1 is a schematic diagram showing the configuration of a conveyor, in which a @ mold (not shown) made by a molding machine 1 is poured with metal and then sent to a mold breaking process via a cooling line.

Here, the casting is separated from the mold and taken out.

Various methods can be used to remove the casting from the mold, but here we will use a sand mold 3 with the casting inside.
from the flask 4 through a vibrating conveyor sieve (usually.

An example of the so-called punch-down method in which the sample is pulled out onto a shaker or shake-out machine 5 is shown in FIG. 42, which is a sectional view taken along IT-II in FIG.

The sand mold 4 dropped onto the shaker 5 is destroyed by vibration, leaving the casting (product part) 6 and sprue runner 7 with hot sand attached.
The returned sand 8 is not partially separated from the return sand 8, passes through the grade 5a opening of the 8-place return sand shaker 5, returns to the Sunagawa vibrating conveyor 9, and is conveyed in the direction of arrow A, and also passes through the grade 5a opening. The missing sprue runner 7 falls onto the collection vibrating conveyor 10°I+, is conveyed in the convex direction of the arrowhead, and is collected. And the return sand that was attached to sprue runner 7.

The returned sand is separated by the return sand separation grade 12, returned by the return sand recovery conveyor 13, and falls onto the Sunagawa 4-1 conveyor 9, where it joins with the return sand 8 that directly fell from the shaker 5.

Note that the vibrating conveyor is made up of a trough 9 that is swingably supported by a plurality of springs 9b and a swinging rod 9C.
All of them are vibrated by a vibration excitation device (not shown), and the powder and granules are conveyed.

However, in the conventional vibrating conveyor configured in this way, the slightly moist and warm return sand that falls and is conveyed to the return Sunagawa vibrating conveyor 9 is cooled in the trough 9a of the return Sunagawa vibrating conveyor 9. The resulting M dew adheres to the trough and gradually obstructs the sand outlet. the result.

A sheathed heater is installed at the bottom of the trough to prevent condensation from forming on the trough, as the amount of transport may locally become excessive and spill over from the trough 9a, or overload the conveyor drive motor (not shown in Figure 1). It would be necessary to take measures such as attaching a trough, blowing warm air into the gap, or circulating black water to keep it warm.

This invention was made by focusing on such conventional problems.
A return Sunagawa conveyor is installed so that the hot return sand separated from the sprue runner falls onto the return Sunagawa vibrating conveyor, and a vibrating conveyor is installed with a plurality of dispersion plates at the starting end. By using a conveyor, the purpose is to solve the above problems.

The present invention will be explained below based on the drawings. FIG. 3.4 is a diagram showing an embodiment of the present invention.

However, parts corresponding to the conventional example are given the same reference numerals as those of the conventional example, and redundant explanation will be omitted.

First, to explain the configuration, the sprue runner 7 with hot sand attached to it falls from the sprue runner conveyor IO to the same conveyor 11.
The sand is separated here and returned to the Sunagawa vibrating conveyor 9.
The heat return Sunagawa conveyor is used to transport the heat to the

24 is the starting end 9 of the trough 9a of the return Sunagawa vibrating conveyor 9
This is to uniformly disperse the hot return sand falling from the heat return sand river conveyor 23 into the trough 9a by a plurality of dispersion plates installed in the trough 9a.

Next, the effect will be explained.

As already detailed in the conventional example, I1 shaker 5
The three pieces of mold sand that are pulled out into the interior are collapsed in the shaker and become return sand, which returns through the corner of grade 5a and falls onto the Sunagawa vibrating conveyor 9, where it is conveyed in the direction of arrow A.

On the other hand, seven high-temperature (usually 500° C. or higher) sprue runners with some mold sand attached are carried by the sprue runner conveyor 10 and fall onto the same conveyor 11. Immediately after falling, the return sand separated from the sprue runner 7 by the separation grade 22 flows in the two directions of the arrows.

Heat return Sunagawa conveyor 23 and return Sunagawa vibrating conveyor 9
The particles fall to the starting end 9a1 of the trough 9a, collide with the first dispersion plate 24, and are not uniformly dispersed on the bottom surface of the trough 9a. Furthermore, since the returning sand at the time of being dispersed has a shortened conveyance path, it is still sufficiently hot (usually 100° C. or higher) and is conveyed in the direction of arrow A while swirling the trough 9a with a force 11. Therefore, the return sand 8 falling from the shaker 5 onto the heated trough 9a
Since it is constantly being cooled, no conclusion occurs on the trough 9a. Therefore, the entire returning sand is smoothly transported on the trough 9a without stagnation.

As explained above, according to the present invention, in the conveyor for conveying the return sand separated by mold breaking, the separated return sand is transferred from the sprue gate runner to the return sand river J radial conveyor. In addition to providing a heat return Sunagawa conveyor so that the heat falls to the starting end, the vibrating conveyor is characterized by providing a plurality of dispersion plates at the starting end, which prevents mold sand from adhering to the surface due to dew condensation and prevents mold sand from overflowing from the trough. In addition to preventing overload of the vibrating conveyor drive motor, the present invention has the advantage that a top heating device or the like for preventing dew condensation is not required.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of a conventional example, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a schematic diagram of the configuration according to the present invention, and FIG. FIG. 1......-...Spring entrance runner 9......Return Sunagawa vibrating conveyor 9a...
... Starting end 23 ... Heat return Sunagawa conveyor 24 ... Dispersion plate 0 Fig. 2 Fig. 3

Claims (1)

[Claims] In the conveyor for conveying the return sand separated by the deforming, a heat return Sunagawa conveyor is provided so that the return sand separated from the sprue runner falls to the starting end of the return Sunagawa vibrating conveyor, and a plurality of heat return sand conveyors are provided at the starting end. A vibrating conveyor characterized by having a plate.