Screening device of sand mixer for machine tool casting production

Abstract

The utility model relates to the technical field of machine tool casting production, in particular to a sand mixer screening device for machine tool casting production, which comprises a machine frame and a screen mesh belt formed by a plurality of screen areas connected in sequence, and screen holes in the screen areas connected in sequence are in a decreasing mode. Winding and unwinding mechanisms connected with the two sides of the screen belt are arranged on the left side and the right side of the rack correspondingly, an arc-shaped screening area is arranged in the middle of the two winding and unwinding mechanisms, and arc-shaped baffles connected with the rack are arranged on the front side and the rear side of the arc-shaped screening area. According to the sand screening device, the screening specification can be conveniently replaced under the condition that sand which does not pass through screening is contained, screening of small-specification sand continues to be carried out after screening, screening can be carried out in sequence according to the specifications from small to large, the screening efficiency is improved, and the screening efficiency is improved. And the replacement process is convenient and smooth.

Description

Technical Field

[0001] This utility model relates to the field of machine tool casting production technology, specifically to a sand mixing and screening device for machine tool casting production. Background Technology

[0002] Sand casting is a common casting method. Its basic working principle is to pour molten metal into a sand mold, wait for the sand mold to solidify, and then break it to obtain the desired casting. Sand casting is widely used in the production of machine tool castings. In order to ensure the casting quality of machine tool castings, the sand crushed by the sand mixer needs to be screened before use. Most sand mixer screening devices use replaceable screens. However, this method requires that the sand that does not pass the screening be discharged before the screen is replaced. Therefore, screen replacement is cumbersome. To address this, a sand mixer screening device for machine tool casting production is designed that allows for easy replacement of screening specifications even when there is unscreened sand. This allows smaller specifications to pass through the screen and then be screened for slightly larger specifications. It facilitates screening in order from smallest to largest specifications and makes the replacement process convenient and smooth. Utility Model Content

[0003] (1) Technical problems solved

[0004] To address the shortcomings of existing technologies, this utility model provides a screening device for a sand mixer used in machine tool casting production. This device facilitates changing the screening specifications when there is unscreened sand, allowing smaller specifications to pass through the screen and then being screened for slightly larger specifications. It also facilitates screening in order of increasing specifications, and the replacement process is convenient and smooth.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sand mixing and screening device for machine tool casting production, comprising a frame and a screen belt composed of multiple sequentially connected screen zones, wherein the screen holes on the multiple sequentially connected screen zones are in a decreasing pattern; the left and right sides of the frame are respectively provided with winding and unwinding mechanisms connected to the two sides of the screen belt; the middle of the two winding and unwinding mechanisms is set as an arc-shaped screening zone; the front and rear sides of the arc-shaped screening zone are provided with arc-shaped baffles connected to the frame; each of the two arc-shaped baffles has an arc-shaped guide groove that slides and guides the screen belt on its opposite side; and two guide shafts are provided on both sides of the arc-shaped screening zone to guide the screen belt; the length of each screen zone is longer than the length of the arc-shaped guide groove; and a stirring mechanism that contacts the inner wall of the screen belt is provided between the two arc-shaped baffles.

[0007] Preferably, the take-up and unwinding mechanism includes a take-up and unwinding roller rotatably connected to the frame, one end of the screen belt is wound onto the take-up and unwinding roller, and a take-up and unwinding motor for driving the take-up and unwinding roller to rotate is fixedly connected to the frame.

[0008] Preferably, the stirring mechanism includes a feeding shaft rotatably connected between two arc-shaped baffles, a plurality of feeding strips that are in contact with the inside of the screen belt are fixedly installed on the feeding shaft in the circumferential direction, and a set of feeding motors fixedly installed on any one of the arc-shaped baffles, the output shaft of the feeding motors being fixedly connected to the feeding shaft.

[0009] Preferably, the top of the arc-shaped screening area is provided with a guide cover that is fixedly connected to the frame.

[0010] Preferably, a receiving box is placed below the arc-shaped screening area, and the bottom of the receiving box is equipped with multiple casters.

[0011] Preferably, both sides of the bottom of the arc-shaped screening area are fixedly installed with limiting plates that slide in coordination with the guide of the receiving box.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model provides a sand mixing and screening device for machine tool casting production, which has the following beneficial effects:

[0014] This sand mixer screening device for machine tool casting production uses two arc-shaped baffles and a screen belt to easily form an arc-shaped screening space. Sand is conveniently stored within this rotating space. During screening, the smallest screen area can be moved to the arc-shaped screening area via multiple sequentially connected screen zones. Simultaneously, a stirring mechanism is activated, causing the sand to agitate the smaller screens for rapid screening. Then, the winding and unwinding mechanisms on both sides move the screen area with slightly larger screen openings to the arc-shaped screening area, allowing for screening in ascending order of size. This sand mixer screening device facilitates changing the screening size even when unscreened sand is present, allowing for the screening of slightly larger sizes after smaller ones have passed through the screen. The process of changing screen sizes is convenient and smooth. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall disassembled structure of this utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of the present invention, which does not include a guide cover or a receiving box.

[0018] Figure 4 This is a schematic diagram showing the disassembled structure of the screen belt, arc-shaped baffle, and guide shaft of this utility model.

[0019] The following are labeled in the attached diagram: 1. Frame; 2. Arc-shaped baffle; 3. Screen belt; 4. Arc-shaped guide chute; 5. Take-up and untake-off roller one; 6. Take-up and untake-off roller two; 7. Guide shaft; 8. Feeding shaft; 9. Feeding bar; 10. Feeding motor; 11. Take-up and untake-off motor; 12. Guide cover; 13. Receiving box; 14. Limiting plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example:

[0022] Please see Figure 1-4 A sand mixing and screening device for machine tool casting production includes a frame 1 and a screen belt 3 composed of multiple sequentially connected screen zones. The screen holes on the multiple sequentially connected screen zones are in a decreasing pattern. The left and right sides of the frame 1 are respectively provided with winding and unwinding mechanisms connected to the two sides of the screen belt 3. The middle part of the two winding and unwinding mechanisms is set as an arc-shaped screening zone. The front and rear sides of the arc-shaped screening zone are provided with arc-shaped baffles 2 fixedly connected to the frame 1. The opposite side of the two arc-shaped baffles 2 is provided with an arc-shaped guide groove 4 that slides and guides the screen belt 3. The device also includes two sets of guide shafts 7 arranged on both sides of the arc-shaped screening zone and guiding the screen belt 3. The length of each screen zone is longer than the length of the arc-shaped guide groove 4. A stirring mechanism that contacts the inner wall of the screen belt 3 is provided between the two arc-shaped baffles 2.

[0023] Specifically, the take-up and unwinding mechanism includes take-up and unwinding rollers rotatably connected to the frame 1. One end of the screen belt 3 is wound onto the take-up and unwinding rollers. The frame 1 is also fixedly connected to a take-up and unwinding motor 11 that drives the take-up and unwinding rollers to rotate. By starting the take-up and unwinding motor 11, the output shaft of the take-up and unwinding motor 11 rotates clockwise or counterclockwise, thereby driving the take-up and unwinding rollers on the same side to take up or unwind, thus ensuring that the screen belt 3 between the two take-up and unwinding mechanisms is in a flat state. Furthermore, the two take-up and unwinding rollers include a take-up and unwinding roller 5 and a take-up and unwinding roller 6 rotatably connected to both sides of the frame 1.

[0024] Specifically, the stirring mechanism includes a material-feeding shaft 8 rotatably connected between two arc-shaped baffles 2. The material-feeding shaft 8 is circumferentially fixedly mounted with multiple material-feeding strips 9 that contact the inside of the screen belt 3. It also includes a set of material-feeding motors 10 fixedly mounted on any one of the arc-shaped baffles 2. The output shaft of the material-feeding motors 10 is fixedly connected to the material-feeding shaft 8. When the material-feeding motors 10 are started, the output shaft of the material-feeding motors 10 rotates, which facilitates the rotation of the material-feeding shaft 8 and the multiple material-feeding strips 9. The multiple material-feeding strips 9 rotate to stir and clear the sand in the arc-shaped screening area, so that the sand can be screened through as much as possible.

[0025] Specifically, a guide cover 12 is fixedly connected to the frame 1 at the top of the arc-shaped screening area. The guide cover 12 facilitates the feeding of sand into the arc-shaped screening area.

[0026] Specifically, a receiving box 13 is placed below the arc-shaped screening area. The bottom of the receiving box 13 is equipped with multiple casters. The receiving box 13 facilitates the receipt of the screened sand and allows the casters to be moved in and out of the arc-shaped screening area.

[0027] Specifically, both sides of the bottom of the arc-shaped screening area are fixedly installed with limiting plates 14 that slide and guide the receiving box 13. The limiting plates 14 facilitate the limiting of the receiving box 13, so that it is centered directly below the arc-shaped screening area.

[0028] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0029] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0030] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sand mixing and screening device for machine tool casting production, characterized in that: The device includes a frame (1) and a screen belt (3) composed of multiple screen zones connected in sequence. The screen holes on the multiple screen zones connected in sequence are in a decreasing pattern. The left and right sides of the frame (1) are respectively provided with winding and unwinding mechanisms connected to the two sides of the screen belt (3). The middle part of the two winding and unwinding mechanisms is set as an arc-shaped screening area. The front and rear sides of the arc-shaped screening area are provided with arc-shaped baffles (2) connected to the frame (1). The two arc-shaped baffles (2) are each provided with an arc-shaped guide groove (4) that slides and guides the screen belt (3) on opposite sides. The device also includes two guide shafts (7) set on both sides of the arc-shaped screening area and guiding the screen belt (3). The length of each screen zone is longer than the length of the arc-shaped guide groove (4). A stirring mechanism that contacts the inner wall of the screen belt (3) is provided between the two arc-shaped baffles (2).

2. The sand mixing and screening device for machine tool casting production according to claim 1, characterized in that: The winding and unwinding mechanism includes a winding and unwinding roller rotatably connected to the frame (1). One end of the screen belt (3) is wound onto the winding and unwinding roller. A winding and unwinding motor (11) for driving the winding and unwinding roller to rotate is also fixedly connected to the frame (1).

3. The sand mixing and screening device for machine tool casting production according to claim 2, characterized in that: The stirring mechanism includes a feeding shaft (8) rotatably connected between two arc-shaped baffles (2), and a plurality of feeding strips (9) that are in contact with the inside of the screen belt (3) are fixedly installed on the feeding shaft (8) in the circumferential direction. It also includes a set of feeding motors (10) fixedly installed on any one of the arc-shaped baffles (2), and the output shaft of the feeding motor (10) is fixedly connected to the feeding shaft (8).

4. The sand mixing and screening device for machine tool casting production according to claim 3, characterized in that: The top of the arc-shaped screening area is provided with a guide cover (12) that is fixedly connected to the frame (1).

5. The sand mixing and screening device for machine tool casting production according to claim 4, characterized in that: A receiving box (13) is placed below the arc-shaped screening area, and the bottom of the receiving box (13) is equipped with multiple casters.

6. The sand mixing and screening device for machine tool casting production according to claim 5, characterized in that: Both sides of the bottom of the arc-shaped screening area are fixedly installed with limiting plates (14) that slide and guide the receiving box (13).

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