Sand-laying device with adjustable angle of sand-scraping component and use method thereof

Abstract

The present invention relates to the field of 3D printers, and in particular to a sand-laying device with an adjustable angle of a sand-scraping component. A sand-laying device with an adjustable angle of a sand-scraping component comprises a main body and two sand-scraping components; the main body has a horizontally extending cavity, and the width of the lower part of the main body gradually decreases to form a narrow and long sand-lowering opening; a side plate is vertically provided at each end of the main body, and the two sand-scraping components are respectively located on both sides of the sand-lowering opening and are arranged horizontally, and the two ends of the sand-scraping components are respectively connected to the two side plates, and the middle of the sand-scraping component is a sand-scraping body, and the sand-scraping body has a plurality of laterally extending sand-scraping surfaces. By replacing different sand-scraping surfaces, the sand-scraping surface in operation is kept in a clean state, which can prevent the sand-scraping component from using the same sand-scraping surface for a long time and being contaminated with black substances, thereby extending the cleaning time of the sand-scraping plate and improving the printing efficiency.

Description

Technical Field

[0001] The invention relates to the field of 3D printers, and in particular to a sand-laying device with an adjustable angle of a sand-scraping component. Background Art

[0002] At present, in the sand-type 3D printer equipment used for casting, the sand-laying device of the sand-laying device has a scraping component that will scrape the powder layer flat during the printing process. In the actual printing process, the angle of the scraping component is fixed. Depending on the different printed products, granular materials of different diameters will be used for printing, or when the scraping angle of the current sand-laying component is not suitable, it is necessary to manually readjust the angle between the scraping component and the sand-laying surface, which is time-consuming and laborious. After the sand-laying device has been working for a long time, the bottom surface of the scraping component will be stained with black matter. When there is too much black matter, the scraping component will push and pull sand, affecting the printing quality, and even causing the printed product to be scrapped. Therefore, it is necessary to clean the black matter on the bottom surface of the scraping component regularly and in a timely manner to prevent it from affecting the quality of the printed product and reducing the printing efficiency of the equipment. Summary of the invention

[0003] The present invention overcomes the problems in the prior art that the angle adjustment of the scraping component of the sand-laying device is inconvenient, and the same scraping component is contaminated with excessive black matter and needs to be frequently cleaned after long-term use, and provides a sand-laying device with an adjustable angle of the scraping component.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a sand-laying device with an adjustable angle of a scraping component, characterized in that it includes a main body and two scraping components; the main body has a horizontally extending cavity, and the width of the lower part of the main body gradually decreases to form a narrow and long sand lowering opening; a side panel is vertically provided at both ends of the main body, and the two scraping components are respectively located on both sides of the sand lowering opening and are horizontally arranged, the two ends of the scraping components are respectively connected to the two side panels, and the middle of the scraping component is a scraping body, and the scraping body has multiple laterally extending scraping surfaces.

[0005] Furthermore, one of the side plates and the two scraping members are respectively provided with through holes at their mating positions, two motors are fixedly provided on the side of the side plate with the through holes away from the main body, and the motor and one end of the scraping member passing through the through holes are driven and connected via a coupling.

[0006] Furthermore, the motor is connected to a motor encoder, and the motor encoder is used to control the rotation angle of the sand scraping component.

[0007] Furthermore, the length of the sand scraping body is greater than or equal to the length of the lower sand opening.

[0008] Furthermore, the cross section of the sand scraping body is a polygon.

[0009] Furthermore, the internal angles of the polygon are equal.

[0010] Furthermore, one of the interior angles of the polygon is larger than the remaining interior angles, and the angles of the remaining interior angles are equal.

[0011] Furthermore, the difference between the maximum interior angle and the minimum interior angle of the polygon does not exceed 5°.

[0012] Furthermore, the two sand scraping components are symmetrically arranged about the lower sand opening.

[0013] Furthermore, the number of the scraped surfaces is 3-15.

[0014] The present invention provides a sanding device with an adjustable angle of a sand scraping component. The sand scraping component has multiple sand scraping surfaces. A motor is used to control the sand scraping component to rotate a certain angle, and a new sand scraping surface can be replaced, which is convenient and quick; and different sand scraping components can be selected according to the diameter of the granular material and the different printing products to meet the printing requirements of different products. By replacing different sand scraping surfaces, the sand scraping surface in operation is kept in a clean state, which can prevent the sand scraping component from using the same sand scraping surface for a long time and being contaminated with black substances, thereby extending the cleaning time of the sand scraping plate and improving the printing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of a sand-laying device with an adjustable angle of a sand-scraping component according to the present invention;

[0016] Figure 2 The present invention Figure 1 Middle AA section view;

[0017] Figure 3 It is a side view of one end of a sand-laying device with an adjustable angle of a sand-scraping member according to the present invention;

[0018] Figure 4 Schematic diagram of a first embodiment of a sand scraping component of the present invention;

[0019] Figure 5 Schematic diagram of the second embodiment of the sand scraping component of the present invention;

[0020] Figure 6 Schematic diagram of the third embodiment of the sand scraping component of the present invention;

[0021] Among them, 10 is a main body, 11 is a lower sand opening, 12 is a side plate, 20 is a sand scraping component, 30 is a motor, and 31 is a coupling. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "upright", "top surface", "bottom surface", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms should be understood in a broad sense, and a person of ordinary skill in the art can understand the specific meaning of the terms in the present invention according to specific circumstances.

[0025] A sand-laying device with an adjustable angle of a scraping component, characterized in that it comprises a main body and two scraping components; the main body has a horizontally extending cavity, and the width of the lower part of the main body gradually decreases to form a narrow and long sand lowering opening; a side plate is vertically provided at each end of the main body, and the two scraping components are respectively located on both sides of the sand lowering opening and are horizontally arranged, the two ends of the scraping components are respectively connected to the two side plates, and the middle of the scraping components is a scraping body, and the scraping body has multiple laterally extending scraping surfaces.

[0026] The concept of the present invention is further described below in conjunction with specific embodiments.

[0027] An embodiment of the present invention is Figure 1-3 As shown, a sand-laying device with an adjustable angle of a sand-scraping component includes a main body 10, a sand-scraping component 20 and a motor 30. The main body 10 is horizontally arranged to accommodate granular materials for printing, such as silica sand, quartz sand, etc. Below the main body 10 is a narrow sand-dropping opening 11 with a gradually decreasing width, and the printing material is spread onto the printing platform through the sand-dropping opening 11. Side panels 12 are provided at both ends of the main body 10 for sealing both ends of the main body 10. Two sand-scraping components 20 are horizontally arranged, located on both sides of the sand-dropping opening, and are rotatably connected to the side panels 12. Figure 1 Two motors 30 are fixedly connected to the side of the side plate 12 on the right side facing away from the main body 10. The side plate 12 is provided with two through holes, and the two scraping components pass through the two through holes and are connected to the motor 30 through a coupling 31. The scraping component 20 and the side plate 12 are connected by bearing matching, and the motor 30 is fixed to the side plate 12 through a mounting plate. The motor 30 is also connected to a motor encoder for controlling the rotation angle of the scraping component 20.

[0028] It should be noted that the middle of the scraping component 20 is a scraping body, and the two ends of the scraping component 20 are connecting shafts. The scraping body has multiple scraping surfaces, and the cross-section of the scraping body is a polygon, or the cross-section of the scraping body is a polygonal surface with rounded corners. The length of the scraping body is greater than or equal to the length of the lower sand port 11, so that the granular material flowing out of the lower sand port 11 can be scraped and smoothed by the scraping component 20 in turn. The scraping components 20 are symmetrically arranged about the lower sand port 11. When the sand-laying device needs to print, the working conditions of the two scraping components 20 are always corresponding, avoiding the problem of repeated scraping of the two scraping components 20 due to different working conditions, so as to meet the use requirements of the sand-laying device for two-way sand-laying. The motor 30 can be controlled by the printer host. The structure of the main body 10 is the existing technology, which can control the closure of the lower sand port 11 and realize two-way sand-laying. The specific description is not given here.

[0029] Embodiment 1 of the sand scraping component of the present invention Figure 4 As shown, the scraping body 20 has 6 scraping surfaces, and the cross section of the scraping body is a hexagon, and the internal angles are equal, so the external angles are all a=60°, that is, a regular hexagon. Take one of the scraping surfaces as the reference surface and set the motor 31 to zero. Before printing starts, the angle between the scraping surface and the horizontal plane is determined according to the mesh number of the printing material. For example, when the mesh number of the printing material is 70-100 mesh, the scraping angle is 0.3°, and the angle between the reference plane and the horizontal plane is adjusted to 0.3°. After the printing work starts, after the sanding device lays a certain number of layers, the black matter contaminated on the scraping surface of the scraping printing material begins to affect the printing quality. At this time, the motor 30 is controlled to drive the scraping component 20 to rotate 60°, and the scraping surface with black matter is replaced by a clean scraping surface, and the clean scraping surface rotates to the bottom. In this way, the scraping plate surface is always kept clean during the sanding process, which avoids the phenomenon of pushing and pulling sand during the printing process and improves the printing quality.

[0030] Embodiment 2 of the sand scraping component of the present invention is as follows Figure 5 As shown, the scraping body 20 has six scraping surfaces, and the cross section of the scraping body is a hexagon, one of the inner angles is larger than the other inner angles, and the angles of the other inner angles are equal, that is, the outer angle a>b. Figure 5 The lowest scraping surface is the reference surface. Assuming a=60.5°, then b=59.9°. The angle between the reference surface and the horizontal plane is 0.7°. The angle opens to the left. The motor 31 is set to zero. First, the sanding device runs with this reference surface as the scraping surface. When the scraping angle needs to be readjusted (reduced) to meet the current printing requirements, the motor 30 is controlled to drive the scraping component 20 to rotate 60° counterclockwise. At this time, the clean scraping surface replaces the reference surface, and the angle formed with the horizontal plane is 0.6°. According to this method, the scraping angle can be adjusted to 0.2°, so as to achieve the purpose of adjusting the scraping angle.

[0031] Embodiment 3 of the sand scraping component of the present invention is as follows Figure 6As shown, the scraping body 20 has four scraping surfaces, and the cross-section of the scraping body is a triangle, and the internal angles are equal, and the internal angles are all 60°, that is, an equilateral triangle. Take one of the scraping surfaces as the reference plane, and set the motor 31 to zero. Before printing starts, the angle between the scraping surface and the horizontal plane is determined according to the mesh number of the printing material. For example: when the mesh number of the printing material is 70-100 mesh, the scraping angle is 0.3°, and the angle between the reference plane and the horizontal plane is adjusted to 0.3°. After the printing work starts, after the sand-laying device lays a certain number of layers of printing material, the scraping surface of the scraping printing material is contaminated with black matter and begins to affect the printing quality. At this time, the motor 30 is controlled to drive the scraping component 20 to rotate 120°, and the scraping surface with black matter is replaced by a clean scraping surface, and the clean scraping surface rotates to the bottom.

[0032] Similarly, when the cross section of the scraping body is a triangle, one of the inner angles is larger than the other inner angles, and the angles of the other inner angles are equal, the scraping angle adjustment of the scraping member can still be achieved.

[0033] It can be seen from this that the cross-section of the scraping body of the scraping component 20 can be any regular polygon, which can realize the replacement of the scraping surface; the cross-section of the scraping body of the scraping component 20 can be any polygon in which one internal angle is larger than the other internal angles and the angles of the other internal angles are equal, which can achieve the purpose of adjusting the scraping angle.

[0034] It should be noted that the angles between the scraping surfaces of the scraping member 20 can be set according to actual conditions, and the same angle or different angles can be selected, or scraping members 20 with different numbers of scraping surfaces can be selected. After each scraping surface of the scraping member 20 has worked for a certain period of time, the black matter on all the scraping surfaces can be cleaned together, which can reduce the number of operations of the scraping member cleaning device and save cleaning time. The difference between the maximum inner angle and the minimum inner angle of the polygon formed by the cross section of the scraping surface part does not exceed 5°, and the number of scraping surfaces is preferably 3-15, and preferably, the number of scraping surfaces is 6.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand-laying device with an adjustable angle of a sand-scraping member, characterized in that: It includes a main body and two scraping components; the main body has a horizontally extending cavity, and the width of the lower part of the main body gradually decreases to form a narrow and long lower sand opening; a side plate is vertically provided at both ends of the main body, and the two scraping components are respectively located on both sides of the lower sand opening and are horizontally arranged, and the two ends of the scraping components are respectively connected to the two side plates, and the middle of the scraping components is a scraping body, and the scraping body has multiple laterally extending scraping surfaces.

2. The sand-laying device with adjustable angle of the sand-scraping member according to claim 1, characterized in that: Through holes are respectively provided at the matching positions of one of the side plates and the two scraping members, and two motors are fixedly provided on the side of the side plate with the through holes away from the main body, and the motor and one end of the scraping member passing through the through holes are driven and connected via a coupling.

3. The sand-laying device with adjustable angle of the sand-scraping member according to claim 2, characterized in that: The motor is connected to a motor encoder, and the motor encoder is used to control the rotation angle of the sand scraping component.

4. The sand-laying device with an adjustable angle of a sand-scraping member according to claim 1, characterized in that: The length of the sand scraping body is greater than or equal to the length of the lower sand opening.

5. The sand-laying device with adjustable angle of the sand-scraping member according to claim 1, characterized in that: The cross section of the sand scraping body is polygonal.

6. The sand-laying device with adjustable angle of the sand-scraping member according to claim 5, characterized in that: The internal angles of the polygon are equal.

7. The sand-laying device with adjustable angle of the sand-scraping member according to claim 5, characterized in that: One of the interior angles of the polygon is larger than the other interior angles, and the angles of the other interior angles are equal.

8. The sand-laying device with adjustable angle of the sand-scraping member according to claim 5, characterized in that: The difference between the maximum interior angle and the minimum interior angle of the polygon does not exceed 5°.

9. The sand-laying device with an adjustable angle of a sand-scraping member according to claim 1, characterized in that: The two sand scraping components are symmetrically arranged about the lower sand opening.

10. The sand-laying device with an adjustable angle of a sand-scraping member according to claim 1, characterized in that: The number of the scraped surfaces is 3-15.

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