Molding sand crushing device

Abstract

The utility model provides a molding sand crushing device which comprises a conveying belt and a supporting plate which is tightly attached to the bottom face of the upper half body of the conveying belt, a rotating shaft and a pressing roller are arranged above the conveying belt and correspond to the supporting plate, the rotating shaft and the pressing roller are driven by a motor respectively, and the arrangement directions of the rotating shaft and the pressing roller are horizontal and perpendicular to the feeding direction of the conveying belt. The pressing roller is located between the rotating shaft and a feeding terminal of the conveying belt, the bottom end of the rim of the pressing roller is close to the conveying belt, a plurality of crushing structures are axially arranged on the circumferential face of the rotating shaft, and each crushing structure comprises a plurality of pricking needles arranged on the surface of the rotating shaft in the same circumferential direction. According to the molding sand crushing device, sand blocks are fed through the conveying belt, crushed through the pricking needles on the rotating shafts in the conveying process and then further pressed and crushed through the pressing rollers, the molding sand crushing effect is improved, follow-up screen filtration is facilitated, and the molding sand recycling rate is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting production, in particular to a molding sand crushing device. Background Art

[0002] Casting is the process of producing castings in sand molds. Casting The method is widely used in the production of steel, iron and most non-ferrous alloy castings. In this production method, molding sand is the most important and most used auxiliary material. With the requirements of industry cleaning and resource recycling, the regeneration and utilization of molding sand has received more and more attention, realizing the recycling of sand.

[0003] In response to the resource recycling, the current method of crushing and recycling molding sand, such as waste sand cores and broken sand blocks after casting demolding, is adopted. The existing crushing and recycling device is mainly composed of two parts: a material box and a crushing roller. The waste sand cores and large pieces of molding sand broken after casting are crushed. However, this crushing method cannot achieve complete crushing of the molding sand blocks, and there will be sand blocks of different sizes, which affects the recycling rate of the molding sand. Utility Model Content

[0004] In view of this, the utility model aims to provide a molding sand crushing device to improve the crushing effect of molding sand blocks and improve the recycling rate of molding sand.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A molding sand crushing device comprises a conveyor belt, and a support plate arranged close to the bottom surface of the upper half of the conveyor belt, a rotating shaft and a pressure roller are arranged above the conveyor belt and at a position corresponding to the support plate, the rotating shaft and the pressure roller are driven by motors respectively, and their respective arrangement directions are horizontal and perpendicular to the feeding direction of the conveyor belt, and the pressure roller is located between the rotating shaft and the feeding terminal of the conveyor belt, and the bottom end of the pressure roller rim is close to the conveyor belt, and an array of crushing structures are axially arranged on the circumferential surface of the rotating shaft, and each crushing structure includes a plurality of needles arranged in the same circumferential direction on the surface of the rotating shaft.

[0007] Furthermore, a horizontal plate is arranged below and close to the rotating shaft, and the horizontal plate has strip holes corresponding to the crushing structure arranged side by side in the feeding direction of the vertical conveyor belt. The long sides of the strip holes are in the same direction as the feeding direction of the conveyor belt, and the width of the strip holes corresponds to the diameter of the needle.

[0008] Furthermore, the pressure roller includes a first pressure roller and a second pressure roller, the first pressure roller and the second pressure roller are arranged in sequence between the rotating shaft and the conveyor belt feeding terminal, there is a gap between the first pressure roller and the second pressure roller and the conveyor belt, and the gap from the first pressure roller to the conveyor belt is larger than the gap from the second pressure roller to the conveyor belt.

[0009] Furthermore, baffles are respectively provided at both ends of the conveyor belt.

[0010] Compared with the prior art, the molding sand crushing device described in the utility model has the following advantages:

[0011] (1) In the utility model, the sand blocks are fed by a conveyor belt, broken by the needles on the rotating shaft during the conveying process, and then further crushed by the pressure roller, thereby improving the crushing effect of the molding sand, facilitating subsequent sieve filtering, and improving the recycling rate of the molding sand.

[0012] (2) In the present invention, the arrangement of the horizontal plate and the strip holes thereon automatically separates the sand blocks carried by the needles from the needles, thereby ensuring that the needles can cut and crush the molding sand blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0014] Figure 1 This is a front view of a molding sand crushing device according to an embodiment of the utility model;

[0015] Figure 2 A top view of a molding sand crushing device according to an embodiment of the utility model;

[0016] Figure 3 It is a three-dimensional schematic diagram of the horizontal plate in this embodiment.

[0017] Description of reference numerals:

[0018] 1- conveyor belt; 11- upper body; 2- baffle; 3- support plate; 4- horizontal plate; 41- strip holes; 5- rotating shaft; 51- needle; 52- vertical rod; 6- first pressure roller; 7- second pressure roller. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0020] like Figure 1 , 2As shown, a molding sand crushing device includes a conveyor belt 1, which is wound between two rollers. The portion of the conveyor belt 1 located above the center line of the two rollers is called the upper half 11, and the portion located below the center line of the two rollers is called the lower half. A support plate 3 is arranged below the upper half 11 and close to its bottom surface. The support plate 3 is connected and fixed to the conveyor belt support frame. The support plate 3 supports the upper half 11 to keep the upper half 11 horizontal. A rotating shaft 5, a first pressure roller 6 and a second pressure roller 7 are arranged above the conveyor belt 1, that is, above the upper half 11 and at a position corresponding to the support plate 3. The rotating shaft 5, the first pressure roller 6 and the second pressure roller 7 are arranged in sequence along the feeding direction of the conveyor belt 1, and each is driven by an independently arranged motor.

[0021] An array of crushing structures is evenly arranged on the circumferential surface of the rotating shaft 5. Each crushing structure includes a number of needles 51 evenly arranged on the same circumferential direction on the surface of the rotating shaft 5. The needles 51 are preferably cylindrical needle structures with their tips facing outward. When the needles 51 are turned to the downward state, their tips pierce the sand blocks on the conveyor belt 1 to crush the sand blocks. There is a gap between the lowest end of the rims of the first pressing roller 6 and the second pressing roller 7 and the upper body 11, and the gap between the first pressing roller 6 and the upper body 11 is larger than the gap between the second pressing roller 7 and the upper body 11. After the sand blocks are crushed by the needles of the rotating shaft 5, they are pressed and crushed by the first pressing roller 6 and the second pressing roller 7 in sequence, and finally form sand particles, which enter the subsequent filtering process for filtering.

[0022] In the present invention, a horizontal plate 4 is arranged below the rotating shaft 5 and close to the rotating shaft 5. The structure of the horizontal plate 4 is as follows: Figure 3 As shown, the left and right edges are provided with vertical rods 42, which are connected and fixed to the conveyor belt support frame through the vertical rods 42. The horizontal plate 4 is provided with strip holes 41 corresponding to the crushing structure in parallel in the feeding direction of the vertical conveyor belt 1. The long sides of the strip holes 41 are in the same direction as the feeding direction of the conveyor belt 1, and the width of the strip holes 41 corresponds to the diameter of the needles 51. During the rotation of the rotating shaft 5, the needles 51 first pass through the strip holes 41 downwards, pierce the sand blocks on the conveyor belt to crush the sand blocks, and with the rotation of the rotating shaft 5, the needles 51 move upwards out of the strip holes 41. In the process of the needles detaching from the strip holes 41, the wall of the strip holes 41 prevents the sand blocks hanging on the needles 51 from moving upwards with the needles, so that the sand blocks are detached from the needles and finally continue to move forward with the conveyor belt.

[0023] In the utility model, baffles 2 are respectively arranged at both ends of the conveyor belt 1, and the baffles 2 are connected and fixed to the conveyor belt supporting frame, and the baffles prevent sand particles from scattering.

[0024] In the utility model, larger molding sand blocks are fed by a conveyor belt. During the conveying process of the sand blocks, they are first crushed by a crushing structure on a rotating shaft to form smaller sand blocks. Then, the first pressing roller and the second pressing roller apply pressure to the small sand blocks step by step to crush them, thereby improving the crushing effect of the molding sand, facilitating subsequent sieve filtration, and improving the recycling rate of the molding sand.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A molding sand crushing device, characterized in that: The invention comprises a conveyor belt (1), and a support plate (3) arranged close to the bottom surface of the upper half (11) of the conveyor belt (1); a rotating shaft (5) and a pressure roller are arranged above the conveyor belt (1) and at a position corresponding to the support plate (3); the rotating shaft (5) and the pressure roller are driven by motors respectively, and their respective arrangement directions are horizontal and perpendicular to the feeding direction of the conveyor belt (1); the pressure roller is located between the rotating shaft (5) and the feeding terminal of the conveyor belt (1); the bottom end of the pressure roller wheel rim is close to the conveyor belt (1); the circumferential surface of the rotating shaft (5) is axially provided with an array of crushing structures, and each crushing structure includes a plurality of needles (51) arranged in the same circumferential direction on the surface of the rotating shaft (5).

2. A molding sand crushing device according to claim 1, characterized in that: A horizontal plate (4) is arranged below the rotating shaft (5) and close to the rotating shaft (5); the horizontal plate (4) has strip holes (41) corresponding to the crushing structure arranged side by side in the feeding direction of the vertical conveyor belt (1); the long sides of the strip holes (41) are in the same direction as the feeding direction of the conveyor belt (1); and the width of the strip holes (41) corresponds to the diameter of the needle (51).

3. A molding sand crushing device according to claim 1, characterized in that: The pressure rollers include a first pressure roller (6) and a second pressure roller (7), the first pressure roller (6) and the second pressure roller (7) are arranged in sequence between the rotating shaft (5) and the feeding terminal of the conveyor belt (1), there are gaps between the first pressure roller (6) and the second pressure roller (7) and the conveyor belt (1), and the gap between the first pressure roller (6) and the conveyor belt (1) is larger than the gap between the second pressure roller (7) and the conveyor belt (1).

4. A molding sand crushing device according to claim 1, characterized in that: Baffles (2) are respectively provided at both ends of the conveyor belt (1).

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