CN207170849U - A kind of casting sand removes Burgy appts with sorting - Google Patents

Abstract

The utility model discloses a device for sorting and removing fine powder for foundry sand, which comprises a screen frame, and is characterized in that it also includes a workbench and a feeding hopper, and the screen frame is located directly below the feeding hopper, and is horizontally arranged with the screen frames facing each other. The two ends of the screen frame are respectively plugged into a card slot, and a push rod is connected to the center of the right end face of the screen frame, and the push rod passes through the card slot on the right side, and the arc-shaped collision head at the other free end ends. A motor is also installed upside down on the lower right side of the workbench, and an eccentric wheel is installed on the rotating shaft of the motor, and the eccentric wheel is intermittently in contact with the collision head. There is a dust collector attached at the bottom. The device has a high degree of automation, workers only need to complete the molding sand adding operation, the labor intensity is greatly reduced, the production efficiency is improved, and the fine powder can be removed synchronously during the screening process, which is beneficial to sand molding processing.

Description

A sorting and removing fine powder device for foundry sand

technical field

The utility model relates to the field of casting processing, in particular to a sorting and fine powder removal device for casting sand.

Background technique

Molding sand is a material used for molding in sand casting. Molding sand is generally made by mixing molding materials such as foundry sand, molding sand binder and auxiliary additives in a certain proportion, and natural silica sand containing clay can also be used. The role of molding sand in foundry production is extremely important, and casting waste products caused by poor quality of molding sand account for about 30-50% of the total casting waste products. The molding sand in the casting process can be recycled and used for casting again, thus effectively saving costs.

In the casting production process, the molding sand after each casting is bonded into a block, which needs to be crushed and screened before it can be used again. In the prior art, the screening device for casting sand has no finalized products, and small foundry enterprises generally use simple sand sieves. The simple foundry sand sieves are composed of four frames and fixed sieves inside the four frames, which are supported obliquely on the ground when in use. , Throw the foundry sand onto the sieve with a shovel, the qualified fine sand falls to the bottom of the sieve, and the agglomerated foundry sand slides down from the top of the sieve. Screening foundry sand with this simple foundry sand sieve is labor-intensive and low in work efficiency.

Furthermore, due to the repeated use of the recycled sand mold, the amount of fine powder will gradually increase, which will have an unreasonable impact on the later sand mold processing.

Utility model content

The purpose of the utility model is to solve the problems in the prior art, to provide a device for sorting and removing fine powder of foundry sand, which has a high degree of automation, workers only need to complete the operation of adding sand, the labor intensity is greatly reduced, and the production efficiency is improved. In the screening process, fine powder can be removed simultaneously, which is beneficial to sand mold processing.

The technical scheme that the utility model adopts is:

A sorting and fine powder removal device for foundry sand, comprising a rectangular sieve frame, characterized in that the device also includes a workbench and a hopper, and the lower part of the hopper passes through the working surface of the workbench, and the sieve frame is located at the top of the hopper Directly below, the opposite ends of the screen frame are installed horizontally and plugged into a card slot respectively. The card slot is suspended and connected with the workbench. There are several Spring, a push rod is connected to the center of the right end face of the screen frame and the push rod passes through the card slot on the right side and an arc-shaped collision head is at the other free end. The motor has an eccentric wheel installed on the shaft of the motor. The eccentric wheel intermittently contacts the collision head and pushes the screen frame to reciprocate horizontally in the two slots. A receiving hopper is installed directly below the screen frame. The two sides are suspended and connected with the left and right card slots respectively, and a dust collector is connected at the bottom of the receiving hopper.

Furthermore, an electromagnetic flow valve is provided at the bottom outlet of the hopper to adjust the amount of molding sand falling into the screen frame, so as to prevent a large amount of molding sand from pouring in at the same time and affecting the screening effect.

Further, the distance between the two opposing surfaces of the two locking grooves is smaller than the length of the screen frame, so as to prevent the screen frame from falling off between the two locking grooves.

Further, the dust remover includes a vertically installed housing, and several grids are installed horizontally at intervals in the housing, a blowing port is provided near the outlet at the bottom of the housing, an air suction port is provided near the inlet at the top of the housing, and a screen The separated molding sand enters the casing, and during the falling process, the molding sand collides with the grid and the air blown from the bottom is disturbed, and the fine powder will fly in the casing and be sucked away from the air outlet to realize the separation of fine powder.

The beneficial effects of the utility model are:

The utility model aims to solve the problem of high labor intensity and low work efficiency in existing enterprises using simple sieves for sand screening in the foundry production process, and designs and develops a sorting and fine powder removal device for foundry sand. It is composed of a workbench, a hopper, a screen frame, a motor and a dust collector. When in use, the molding sand falls evenly into the screen frame from the hopper, and the motor drives the eccentric wheel to rotate rapidly and intermittently contacts the collision head to force the push rod to move back and forth, and the screen frame also moves back and forth in the two slots accordingly. The molding sand is screened in this process. The degree of automation is high, workers only need to complete the molding sand adding operation, the labor intensity is greatly reduced, and the production efficiency is improved. At the same time, when the molding sand passes through the dust collector, the air blown in from the bottom will make the fine powder fly up and be discharged from the air outlet. At the same time, the sieving and fine powder removal operations are realized, which is beneficial to the later sand molding processing.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the cross-sectional structure along A-A in Fig. 1 .

Detailed ways

In order to make the purpose of the utility model and the advantages of the technical solution clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and examples.

As shown in Figures 1 and 2, a device for sorting and removing fine powder for foundry sand includes a rectangular sieve frame 1, and the device also includes a workbench 2 and a hopper 3, and the lower part of the hopper 3 passes through the workbench 2. On the other hand, the screen frame 1 is located directly below the feeding hopper 3, and is horizontally arranged, and the two opposite ends of the screen frame 1 are inserted into a slot 4, and the slot 4 is suspended and connected with the workbench 2. A number of springs 5 are installed between the inner wall of the slot 4 on the left side and the left end face of the screen frame 1, and a push rod 6 is connected to the center of the right end face of the screen frame 1, and the push rod 6 passes through the slot 4 on the right and is placed on the other side. A collision head 7 with a free end arc, under the right side of the workbench 2, a motor 8 is installed upside down and an eccentric wheel 9 is installed on the rotating shaft of the motor 8, and the eccentric wheel 9 contacts the collision head 7 intermittently and Push the screen frame 1 to reciprocate horizontally in the two draw-in slots 4. A hopper 11 is suspended and installed directly below the screen frame 1, and the two sides of the hopper 11 are respectively suspended and connected to the left and right two draw-in slots 4. A dust collector is connected to the bottom of the receiving hopper 11 .

An electromagnetic flow valve 10 is provided at the bottom outlet of the hopper 3 .

The distance between the two opposing faces of the two clamping grooves 4 is less than the length of the screen frame 1 .

The dust collector includes a vertically installed housing 12, in which several grids 13 are installed horizontally at intervals, a blower port 14 is provided near the outlet at the bottom of the housing 12, and a suction port is provided near the inlet at the top of the housing. Mouth 15.

When the utility model is used, the molding sand to be screened is placed in the hopper 3, the motor 8 is started, and the eccentric wheel 9 rotates thereupon. The molding sand falls into the screen frame 1 at a constant speed from the outlet at the bottom of the hopper 3 . When the eccentric wheel 9 rotates to the position where the collision head 7 contacts, the push rod 6 moves to the left, the screen frame 1 moves to the left synchronously, and the spring 5 is compressed; when the eccentric wheel 9 rotates to the point where the collision head 7 is separated, the spring 5 recovers its deformation , push screen frame 1 to move to the right. During the horizontal reciprocating movement of the screen frame 1, the required part of the molding sand passes through the screen frame 1 and falls into the receiving hopper 11 below. The screened molding sand falls into the casing 12 from the bottom of the receiving hopper 11 . During the falling process, the molding sand collides with multiple grids 13 in the casing 12, and the fine powder will be separated from the heavier molding sand due to its light weight. Simultaneously, because the air that blows in below housing 12 is to accelerating fine powder to fly, and fine powder water air is sucked away from air outlet 15 places.

Claims (4)

1. A sorting and fine powder removal device for foundry sand, comprising a rectangular sieve frame (1), characterized in that the device also includes a workbench (2) and a hopper (3) and the lower part of the hopper (3) passes through On the working surface of the workbench (2), the screen frame (1) is located directly below the hopper (3), is set horizontally, and the opposite ends of the screen frame (1) are inserted into a card slot (4) respectively , the slot (4) is suspended and connected with the workbench (2), a number of springs (5) are installed between the inner wall of the slot (4) on the left side and the left end face of the screen frame (1), and the screen frame (1 ) is connected to a push rod (6) at the center of the right end face, and the push rod (6) passes through the card slot (4) on the right side and has an arc-shaped collision head (7) at the other free end. A motor (8) is installed upside down on the lower right side of the workbench (2), and an eccentric wheel (9) is installed on the rotating shaft of the motor (8). The eccentric wheel (9) intermittently contacts the collision head (7) and pushes the screen frame (1) Horizontally reciprocating in the two slots (4), the receiving hopper (11) is suspended and installed directly below the screen frame (1), and the two sides of the receiving hopper (11) are respectively connected with the left and right two slots (4) are suspended and connected together, and a dust collector is connected at the bottom of the receiving hopper (11). 2. The device for sorting and removing fine powder of foundry sand according to claim 1, characterized in that: an electromagnetic flow valve (10) is provided at the bottom outlet of the hopper (3). 3. The device for sorting and removing fine powder of foundry sand according to claim 1, characterized in that the distance between the two opposing surfaces of the two clamping grooves (4) is smaller than the length of the screen frame (1). 4. A sorting and fine powder removal device for foundry sand according to claim 1, characterized in that: the dust collector includes a vertically installed housing (12), and the housing (12) is horizontally A plurality of grilles (13) are installed at intervals, a blowing port (14) is provided near the outlet at the bottom of the housing (12), and an air suction port (15) is provided near the inlet at the top of the housing.