JPH08112643A - Device for discharging recovered molding sand - Google Patents

Abstract

PURPOSE: To discharge recovered sand having always almost uniform characteristic from a sand hopper by partitioning the inner part of the sand hopper into two storing chambers with a partition plate vertically extending in the inside of the sand hopper and separately supplying the recovered sand having different characteristics to two storing chambers through a sand recovering conveyor. CONSTITUTION: Two kinds of the recovered sands are separately stored in two storing chambers 7, 8 by operating a sand dropping plate 10 on the sand recovering conveyor 9. Successively, at the time of needing the discharge, a rotary driving mechanism 2 is worked to rotate a rotary table 1. The recovering sands having different characteristics stored in two storing chambers 7, 8 are discharged while mixing at a fixed ratio according to the rotation of the rotary table 1 at the lower part of the sand hopper 5. The recovered sand is discharged from a sand discharging hole 4 and dropped on a discharged sand shifting conveyor 11 through a sand guide chute 12 and shifted to the following process. Therefore, the recovered sand having always uniform characteristic can be discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to temporarily store the foundry sand recovered by unraveling a poured sand mold and cutting out the stored sand as needed. The present invention relates to a recovery casting sand slicing device.

[0002]

2. Description of the Related Art Conventionally, the recovery casting sand slicing device as described above is used for sand containing a large amount of core sand, sand not containing core sand, or sand with a large sand metal ratio and small sand. Foundry sands having different properties are sequentially collected and accumulated in layers in the sand hopper. On the other hand, when cutting out, the collected sand accumulated in layers is cut out in sequence, so the properties of the cut out sand are uneven, and it is not possible to generate uniform casting sand in the next sand treatment. However, there is a problem that it affects the quality of the molded mold and thus the cast product. The present invention has been made to solve the above problems, and an object of the present invention is to provide a recovered foundry sand slicing device which is configured to constantly sever recovered sand having a substantially uniform property from the sand hopper.

[0003]

In order to achieve the above object, the recovered casting sand slicing device according to the present invention comprises a sand hopper having a sand discharge port at the lower end side above a rotary table rotated in a horizontal plane. In a recovered casting sand slicing device disposed so as to be slidably fixedly disposed so as to face the sand conveyor above the sand hopper, the inside of the sand hopper is divided into two storage chambers by a vertically extending partition plate, Moreover, the sand recovery conveyor is configured to be capable of separately supplying recovered sands having different properties to the two storage chambers.

[0004]

The present invention operates as follows by adopting the above-mentioned solving means. The foundry sand recovered by the sand recovery conveyor is put into one of the storage chambers according to the property of the sand, and two types of recovered sand having different properties are separately stored. On the other hand, when cutting out, as the rotary table rotates at the lower end,
Foundry sands stored separately in the two storage chambers are mixed at a constant ratio and discharged from the sand discharge port.

[0005]

Embodiment An embodiment of the present invention will be described below in detail with reference to FIG. The rotary table 1 rotatably supported in the horizontal plane is configured to be engaged with the rotary drive mechanism 2 to drive and rotate. A sand hopper 5 having a sand discharge port 4 on the lower end side is fixedly disposed on the upper portion of the rotary table 1 so as to be slidable relative to the rotary table 1, and inside the sand hopper 5. Is partitioned into two storage chambers 7, 8 on the left and right by a partition plate 6 extending vertically.
Although the partition plate 6 is provided in the central portion in the embodiment,
Depending on the mixing ratio of the two types of recovered sand, it may be provided in a state of being biased to the left or right. Also, the sand hopper 5
Above the above, there is provided a sand recovery conveyor 9 whose right end is passed from above the one storage room 8 to above the other storage room 7 and its tip is exposed. At the upper position corresponding to the one storage chamber 8, a sand removing plate 10 is provided so as to be able to move up and down. In addition, 11 in the figure
Is a sand transfer conveyor, 12 is a sand guide chute, 1
Reference numeral 3 is a recovered sand guide member.

[0006] The thus constructed structure operates two types of recovered sand by operating the sand removing plate 10 of the sand recovery conveyor 9 (for example, sand containing a large amount of core sand, sand not containing core sand, or sand containing sand). Sand with a large metal ratio and small sand)
Are separately stored in the two storage chambers 7 and 8 to be in the state of FIG. Next, when cutting out is necessary, the rotary drive mechanism 2 operates to rotate the rotary table 1. By this operation, the recovered sand stored in the two storage chambers 7 and 8 having different properties has a constant ratio (1: 1 in the embodiment) in the lower part of the sand hopper 5 as the rotary table 1 rotates.
Are mixed and cut out, discharged from the sand discharge port 4, dropped through the sand guide chute 12 and dropped onto the sand transfer conveyor 11, and transferred to the next step. In the above embodiment, the sand removing plate 10 is moved up and down in order to distribute the two types of recovered sand to the storage chambers 7 and 8, but two conveyors corresponding to the storage chambers 7 and 8 may be provided.

[0007]

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

[Brief description of drawings]

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

[Explanation 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)

[Claims] 1. A sand hopper 5 having a sand discharge port 4 at a lower end side above a rotary table 1 which is rotated in a horizontal plane.
In the recovered casting sand slicing device, in which the sand is relatively slidably fixedly arranged and the sand recovery conveyor 9 is disposed above the sand hopper 5, a partition plate 6 extending vertically inside the sand hopper 5 is used. It is divided into two storage chambers 7 and 8, and the sand recovery conveyor 9 is connected to the two storage chambers 7 and 8.
8, the recovered sand sand slicing device is characterized in that recovered sand having different properties can be separately supplied.