New sand feeding and mixing mechanism of sand returning belt

Abstract

The utility model discloses a new sand feeding and mixing mechanism for a sand return belt, which is mounted above the sand return belt and comprises a feeding hopper, an outlet is arranged below the feeding hopper and faces the sand return belt, a feeding port is arranged on the right side of the feeding hopper, and a new sand belt capable of conveying materials to the feeding hopper is arranged at the feeding port of the feeding hopper. A rotating wheel is arranged at the lower position in the feeding hopper, a plurality of scattering rods are arranged on the rotating wheel, and a plurality of rakes with rake teeth are arranged below the rotating wheel in the feeding hopper from front to back; a feeding hopper is arranged above a sand returning belt, a new sand belt is arranged on the feeding hopper at the position of the feeding hopper, in the process that old sand returns to a sand bin, new sand is continuously added to the sand returning belt, in other words, mixing of the new sand and the old sand is completed in the material conveying process, the contact area of the old sand and the new sand is enlarged, and the mixing effect of the new sand and the old sand is improved; in addition, in the sand returning process, the sand is mixed with new sand, the humidity of the conveyed sand is reduced, and the adhesion of the sand on the sand returning belt is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of casting back sand and new sand mixing technology, and in particular relates to a back sand belt feeding and mixing mechanism for new sand. Background Technology

[0002] In the foundry industry, a large amount of molding sand is used to make sand boxes for casting. After casting is completed, the used molding sand is usually transported to the sand bin by a sand return belt after demolding, and then mixed with new sand for reuse in casting.

[0003] The method described above, which involves transporting all the old sand to the sand silo and then mixing it with the new sand, has some shortcomings in actual implementation: the mixing effect is slightly worse when the old sand is piled up in the sand silo before being mixed with the new sand; in addition, the old sand is prone to sticking to the return sand conveyor belt during transportation due to its high moisture content. Utility Model Content

[0004] In view of the shortcomings and defects in the existing technology, the purpose of this utility model is to provide a new sand feeding and mixing mechanism for a return sand belt, which solves the problem of poor mixing effect when old sand is mixed with new sand only after it returns to the sand bin, and the problem that old sand is prone to sticking to the return sand belt during transportation due to its high moisture content.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a new sand feeding and mixing mechanism for a return sand conveyor belt, installed above the return sand conveyor belt, including a feeding hopper, the feeding hopper being set above the return sand conveyor belt by a bracket, an outlet being provided below the feeding hopper, the outlet of the feeding hopper facing the return sand conveyor belt, a feed inlet being provided on the right side of the feeding hopper, a new sand conveyor belt for conveying material into the feeding hopper being provided at the feed inlet, a rotating wheel being rotatably provided at the lower position inside the feeding hopper, the rotating wheel being provided with multiple dispersing rods, a baffle being fixedly connected to the left and right sides of the front end of the feeding hopper outlet, a rubber baffle strip that contacts the return sand conveyor belt being detachably provided on the baffle, and multiple rakes with rake teeth being provided from front to back below the rotating wheel inside the feeding hopper.

[0006] As a further improvement of this utility model, it also includes a motor, a first pulley connected to the output shaft of the motor, the front end of the rotating wheel extending out of the feed hopper, and a second pulley connected to the front end of the rotating wheel, the first pulley and the second pulley being connected by a belt.

[0007] As a further improvement of this utility model, the left and right ends of the rake are fixed to the inner wall of the feed hopper.

[0008] As a further improvement of this utility model, the baffle and the rubber baffle are detachably connected by bolts.

[0009] As a further improvement of this utility model, the bottom of the rake teeth is provided with a rubber head, and the bottom of the rubber head contacts the sand return belt.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] 1. By setting a hopper above the sand return conveyor belt, with an outlet at the bottom and a feed inlet at the top, and a new sand conveyor belt above the hopper, and a rotating wheel inside the hopper with a dispersing rod, new sand is continuously added to the sand return conveyor belt as it returns old sand to the sand bin. This mixes the old and new sand during the conveying process, increasing the contact area between them and improving the uniformity and effect of the mixture. In addition, the old sand mixes with the new sand during the return process, reducing the moisture content of the conveyed sand and decreasing the stickiness of the sand on the return conveyor belt.

[0012] 2. By installing a rotary wheel inside the feed hopper, and a dispersing rod on the rotary wheel, the new sand falling from the new sand conveyor belt can be evenly dispersed to a certain extent, thereby improving the uniformity of the new sand falling onto the old sand and thus improving the mixing effect of the new sand and the old sand.

[0013] 3. A rake is installed in the feed hopper. When the new sand and old sand pass through the rake, the rake can mix the new sand and old sand to a certain extent.

[0014] 4. A baffle is fixedly connected to each of the left and right sides of the front end of the feed hopper outlet. The baffle is detachably equipped with a rubber baffle that contacts the return sand belt, which reduces the overflow of sand during the feeding and mixing process. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] In the diagram: 1. Return sand belt; 2. Feed hopper; 3. Feed inlet; 4. New sand belt; 5. Rotary wheel; 6. Dispersing rod; 7. Baffle; 8. Rubber baffle strip; 9. Rake; 10. First pulley; 11. Second pulley; 12. Belt; 13. Support frame; 14. Machine base; 15. Motor. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-2The present invention will be described in further detail below. For clarity, only the structures relevant to the inventive features of the present invention are shown in the figures.

[0020] For ease of description, the coordinate system is defined as follows: Figure 1 As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0021] This utility model discloses a new sand feeding and mixing mechanism for a return sand conveyor belt. (Refer to...) Figure 1 and Figure 2 A new sand feeding and mixing mechanism for a return sand conveyor belt is installed above a return sand conveyor belt 1. It includes a feed hopper 2, which is positioned above the return sand conveyor belt 1 via a bracket 13. An outlet is located at the bottom of the feed hopper 2, facing the return sand conveyor belt 1. An inlet 3 is located on the right side of the feed hopper 2. A new sand conveyor belt 4 for feeding material into the feed hopper 2 is located at the inlet 3. A rotating wheel 5 is rotatably mounted inside the feed hopper 2 at its lower position. The mechanism also includes a motor 15, which is fixed to a base 14. A first pulley 10 is connected to the output shaft of the motor 15. The front end of the rotating wheel 5 extends out of the feed hopper 2, and a second pulley 11 is connected to the front end of the rotating wheel 5. The first pulley 10 and the second pulley 11 are connected by a belt 12. Multiple dispersing rods 6 are provided on the rotating wheel 5. The rotating wheel 5 and the dispersing rod 6 can disperse the new sand falling from the new sand belt 4 to a certain extent, improve the uniformity of the new sand falling on the old sand, and thus improve the mixing effect of the new sand and the old sand.

[0022] The new sand conveyor belt 4 and the return sand conveyor belt 1 mentioned above can be conveyed by belt 12 commonly used in the prior art. One end of the roller of the new sand conveyor belt 4 extends into the feed hopper 2, and the bearing seat of the roller of the new sand conveyor belt 4 is fixed on the outer wall of the feed hopper 2.

[0023] like Figure 1 As shown, a baffle 7 is fixedly connected to the left and right sides of the front end of the feed hopper 2 outlet. A rubber baffle 8 that contacts the return sand belt 1 is detachably installed on the baffle 7 by bolts. The baffle 7 and the rubber baffle 8 reduce the overflow of sand when the material is falling and mixed.

[0024] In addition, such as Figure 2 As shown, the feed hopper 2 has multiple rakes 9 with rake teeth arranged from front to back below the rotating wheel 5. The left and right ends of the rakes 9 are fixed to the inner wall of the feed hopper 2. The bottom of the rake teeth of the rakes 9 is provided with rubber heads. The bottom of the rubber heads contacts the return sand belt 1. When new sand and old sand pass through the rakes 9, the rakes 9 can mix the new sand and old sand to a certain extent.

[0025] This invention features a hopper 2 above the return sand conveyor belt 1, with an outlet at the bottom and a feed inlet 3 at the top. A new sand conveyor belt 4 is installed on the hopper 2 at the feed inlet, and a rotating wheel 5 with a dispersing rod 6 is installed inside the hopper 2. Therefore, as the return sand conveyor belt 1 returns old sand to the sand bin, new sand is continuously added to the return sand conveyor belt 1, thereby completing the mixing of old and new sand during the conveying process. This increases the contact area between the old and new sand, improving the mixing uniformity and effect. In addition, the old sand is mixed with the new sand during the return process, reducing the moisture content of the conveyed sand and reducing the stickiness of the sand on the return sand conveyor belt 1.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be understood that the specific embodiments described herein are only for understanding this utility model and are not intended to limit this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

Claims

1. A new sand feeding and mixing mechanism for a return sand conveyor belt, installed above the return sand conveyor belt: characterized in that: The device includes a feeding hopper, which is mounted above the return sand conveyor belt via a bracket. An outlet is located below the feeding hopper, facing the return sand conveyor belt. A feed inlet is located on the right side of the feeding hopper, and a new sand conveyor belt is installed at the feed inlet to transport material into the feeding hopper. A rotating wheel is located rotatably at the lower part of the feeding hopper, and multiple dispersing rods are mounted on the rotating wheel. A baffle is fixedly connected to the left and right sides of the front end of the feeding hopper outlet, and a detachable rubber baffle strip that contacts the return sand conveyor belt is mounted on the baffle. Multiple rakes with rake teeth are located from front to back below the rotating wheel inside the feeding hopper.

2. The new sand feeding and mixing mechanism for a return sand conveyor belt according to claim 1, characterized in that: It also includes a motor, with a first pulley connected to the output shaft of the motor. The front end of the pulley extends out of the feed hopper, and a second pulley is connected to the front end of the pulley. The first pulley and the second pulley are connected by a belt.

3. The new sand feeding and mixing mechanism for a return sand conveyor belt according to claim 1, characterized in that: The rake is fixed to the inner wall of the feed hopper at both ends.

4. The new sand feeding and mixing mechanism for a return sand conveyor belt according to claim 1, characterized in that: The baffle and the rubber baffle are detachably connected by bolts.

5. A new sand feeding and mixing mechanism for a return sand conveyor belt according to any one of claims 1-4, characterized in that: The bottom of the rake teeth is provided with a rubber head, and the bottom of the rubber head contacts the sand return belt.

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