JP3129615B2 - Sand casting device for recovered castings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for temporarily storing casting sand recovered by unmolding a poured sand mold, and cutting out a necessary amount of the stored sand as needed. The present invention relates to a recovered casting sand cutting device.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned recovered casting sand cutting apparatus has been used for sand containing a large amount of core sand, sand containing no core sand, or sand having a large ratio of sand metal to small sand. Foundry sands having different properties are sequentially collected and deposited in layers in a sand hopper. On the other hand, when performing cutting, since the collected sand deposited in layers is cut out sequentially, the properties of the cut sand are not uniform, and it is not possible to produce uniform casting sand in the next sand treatment. In addition, there is a problem that the quality of a mold to be formed, and further, the quality of a cast product is affected. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a recovered casting sand cutting device in which recovered sand having substantially uniform properties is always cut out from a sand hopper.

[0003]

In order to achieve the above object, a sand casting apparatus for recovering foundry sand according to the present invention comprises a sand hopper having a sand discharge port at a lower end side above a rotary table rotated in a horizontal plane. In the recovered casting sand cutting device disposed fixedly slidably and arranged with a sand conveyor facing above the sand hopper, the inside of the sand hopper is partitioned into two storage chambers by a partition plate extending vertically. In addition, the sand recovery conveyor is configured to be capable of separately supplying recovered sand having different properties to the two storage rooms.

[0004]

The present invention operates as follows by employing the above-mentioned solution. The foundry sand collected by the sand recovery conveyor is put into one of the storage rooms according to the properties of the sand, and two types of recovered sand having different properties are separately stored. On the other hand, when cutting is performed, with the rotation of the turntable at the lower end,
The foundry sand separately stored in the two storage compartments is mixed at a certain ratio and discharged from the sand discharge port.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIG. The rotary table 1 rotatably supported in a horizontal plane is configured to engage with a rotary drive mechanism 2 and drive and rotate. A sand hopper 5 having a sand discharge port 4 at a lower end side is fixedly disposed on the upper portion of the rotary table 1 so as to be relatively slidable with respect to the rotary table 1. Is divided into two left and right storage chambers 7 and 8 by a partition plate 6 extending vertically.
In the embodiment, the partition plate 6 is provided at the center,
Depending on the mixing ratio of the two types of recovered sand, the recovered sand may be provided in a state where it is biased to the left or right. The sand hopper 5
A sand recovery conveyor 9 is provided above the first storage room 8 from the right outside, passing above the one storage room 8 and facing the top of the other storage room 7. At an upper position corresponding to the one storage room 8, a dropout plate 10 is provided so as to be able to move up and down. In addition, 11 in the figure
Is a sand conveyor, 12 is a sand guide chute, 1
Reference numeral 3 denotes a recovered sand guide member.

[0006] By operating the tumbling plate 10 of the sand recovery conveyor 9, two types of recovered sand (for example, sand containing a large amount of core sand and sand not containing a large amount of core sand, or Sand with large and small metal ratio)
Are separately stored in the two storage chambers 7 and 8 to be in the state of FIG. Next, when cutting is necessary, the rotation drive mechanism 2 operates to rotate the turntable 1. Due to this operation, the collected sand having different properties stored in the two storage chambers 7 and 8 has a fixed ratio (1: 1 in the embodiment) with the rotation of the rotary table 1 below the sand hopper 5.
, Is discharged from the sand discharge port 4, falls through the sand guide chute 12, falls on the sand transfer conveyor 11, and is transferred to the next step. In the above-described embodiment, the drop-off plate 10 is moved up and down in order to distribute two types of collected sand to the storage rooms 7 and 8, but two conveyors corresponding to the storage rooms 7 and 8 may be provided.

[0007]

As apparent from the above description, the recovered casting sand cutting device according to the present invention stores two types of recovered sand having different properties separately, and stores the two types in accordance with the rotation of the rotary table. Since the collected sand is mixed at a predetermined ratio and cut out, it is possible to always cut out the collected sand having uniform properties, which is extremely advantageous.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary table 4 Sand discharge port 5 Sand hopper 6 Partition plate 7 8 Storage room 9 Sand recovery conveyor

Claims (1)

(57) [Claims] 1. A sand hopper 5 having a sand discharge port 4 at a lower end side above a turntable 1 rotated in a horizontal plane.
Are fixedly arranged so as to be relatively slidable with each other, and the sand casting conveyor 9 is disposed above the sand hopper 5. The storage compartment 7 is partitioned into two storage compartments 7 and 8, and the sand recovery conveyor 9 is divided into the two storage compartments 7 and 8.
8. A recovered casting sand cutting device characterized in that the recovered sand having different properties can be separately supplied to the device.