Scraper knife mechanism and 3D printer

Abstract

The utility model provides a scraper knife mechanism and a 3D printer. The scraper knife mechanism comprises a base, a scraper knife body and a driving device, the scraper knife is movably arranged on the base, and the scraper knife has an initial position relative to the base; the cleaning part is arranged on one side close to the scraper knife, and when the scraper knife moves out from the initial position, one end of the cleaning part abuts against the surface of the scraper knife and slides along the surface of the scraper knife. According to the technical scheme provided by the invention, the problem that the shoveling piece effect is affected due to the fact that resin on the shovel blade cannot be removed in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a scraper mechanism and a 3D printer. Background Art

[0002] 3D printing technology is to manufacture three-dimensional entities by layering through 3D printing equipment based on the three-dimensional model data of the object. 3D printing technology can overcome special structural obstacles that cannot be achieved by traditional mechanical processing and realize the simplified production of any complex structural parts. Current 3D printing technologies include laser stereolithography (SLA), digital light processing (DLP), liquid crystal display technology (LCD), fused deposition modeling (FDM) and selective laser sintering (SLS).

[0003] In the related art, the main function of the scraper of the 3D printing equipment is to peel off the completed 3D printed part from the forming platform. This is a key step in the 3D printing process, because after the printed part is solidified layer by layer on the forming platform, it needs to be removed for subsequent processing or inspection.

[0004] However, the resin remaining on the scraper blade in the related art cannot be removed, and the resin on the scraper blade remaining on the scraper blade for a long time may affect the effect of the scraper. Utility Model Content

[0005] The utility model provides a scraper mechanism and a 3D printer, so as to solve the problem in the related art that the resin on the scraper cannot be removed, thus affecting the scraping effect.

[0006] According to one aspect of the utility model, a scraper mechanism is provided, which includes: a base; a scraper, which is movably arranged on the base and has an initial position relative to the base; a cleaning member, which is arranged on a side close to the scraper, and when the scraper moves from the initial position, one end of the cleaning member abuts against the surface of the scraper and slides along the surface of the scraper.

[0007] Furthermore, when the scraper is located at the initial position, one end of the cleaning member protrudes from or is flush with the surface of the scraper.

[0008] Furthermore, when the scraper is located at the initial position, one end of the cleaning member is inclined in a direction close to the scraper.

[0009] Furthermore, the scraper has a blade, and when the scraper is located at the initial position, the blade abuts against the side wall of the cleaning member.

[0010] Furthermore, one side surface of the scraper has an inclined surface, which extends to the end of the scraper. When the scraper moves from an initial position, the upper end of the cleaning member abuts against the inclined surface and slides along the inclined surface.

[0011] Further, in the direction in which the blade moves out from the initial position, the blade is arranged to be tilted upward.

[0012] Furthermore, the thickness of the cleaning element is between 2 mm and 6 mm.

[0013] Furthermore, the cleaning element is made of a flexible material, and the flexible material includes a rubber material.

[0014] Furthermore, the scraper mechanism also includes a liquid receiving part, which is arranged on the base. When the scraper is located at the initial position, the scraper is located above the liquid receiving part. The liquid receiving part includes a liquid receiving groove, and the opening of the liquid receiving groove faces upward.

[0015] According to another aspect of the utility model, a 3D printer is provided. The 3D printer includes a scraper mechanism, and the scraper mechanism is the scraper mechanism provided above.

[0016] The technical solution of the utility model is applied, and the scraper mechanism includes a base, a scraper and a cleaning piece. The scraper is movably arranged on the base, and the scraper has an initial position relative to the base. When the scraper moves out of the initial position, the scraper can peel the printed three-dimensional printed part off the forming platform. Since the scraper mechanism is provided with a cleaning piece, and the cleaning sheet is arranged close to one side of the scraper, when the scraper moves out of the initial position, one end of the cleaning piece abuts against the surface of the scraper and slides along the surface of the scraper, and the cleaning piece can be used to clean the residual resin on the scraper, so that the resin on the scraper will not remain on the scraper for a long time, thereby improving the effect of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary 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 drawings:

[0018] Figure 1 A front view of a scraper mechanism provided by an embodiment of the utility model is shown;

[0019] Figure 2 A schematic structural diagram of a scraper mechanism provided by an embodiment of the utility model is shown;

[0020] Figure 3 A partial enlarged view of the scraper mechanism provided by an embodiment of the utility model is shown;

[0021] Figure 4 A schematic diagram showing a scraper of the scraper mechanism provided by an embodiment of the utility model when the scraper is in an initial position;

[0022] Figure 5A schematic diagram showing the process of a blade of a blade mechanism provided by an embodiment of the utility model moving from an initial position to a forward position;

[0023] Figure 6 Another schematic diagram showing a process in which the blade of the blade mechanism provided by the embodiment of the utility model moves from the initial position to the forward position;

[0024] Figure 7 Another schematic diagram showing the process of the blade of the blade mechanism provided by the embodiment of the utility model moving from the initial position to the forward position;

[0025] Figure 8 A schematic diagram showing the process in which the blade of the blade mechanism provided by the embodiment of the utility model moves from the forward position to the initial position;

[0026] Fig. 9 Another schematic diagram showing the process in which the blade of the blade mechanism provided by the embodiment of the utility model moves from the forward position to the initial position;

[0027] Fig.10 Another schematic diagram showing the process in which the blade of the blade mechanism provided by the embodiment of the utility model moves from the forward position to the initial position;

[0028] Fig.11 A schematic diagram showing the blade of the blade mechanism provided by the embodiment of the utility model moving from the forward position back to the initial position;

[0029] Fig.12 A schematic diagram showing a scraper of the scraper mechanism provided by an embodiment of the utility model when the scraper is in an initial position;

[0030] Fig.13 A schematic diagram showing the process of a blade of a blade mechanism provided by an embodiment of the utility model moving from an initial position to a forward position;

[0031] Fig.14 Another schematic diagram showing a process in which the blade of the blade mechanism provided by the embodiment of the utility model moves from the initial position to the forward position;

[0032] Fig.15 Another schematic diagram shows the process in which the blade of the blade mechanism provided by the embodiment of the utility model moves from the initial position to the forward position.

[0033] The above drawings include the following reference numerals:

[0034] 10. Base; 11. Blade guide rail;

[0035] 20. Shovel; 21. Blade; 211. Inclined surface;

[0036] 30. Liquid contact parts; 31. Liquid receiving tank;

[0037] 40. Cleaning parts; 50. Shovel seat. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] like Figures 1 to 3 As shown, the embodiment of the utility model provides a scraper mechanism, which includes a base 10, a scraper 20 and a cleaning member 40. The scraper 20 is movably arranged on the base 10, and the scraper 20 has an initial position and a forward position relative to the base 10. The cleaning member 40 is arranged on a side close to the scraper 20, and when the scraper 20 moves out of the initial position, one end of the cleaning member 40 abuts against the surface of the scraper 20 and slides along the surface of the scraper 20.

[0040] By using the scraper mechanism provided in this embodiment, when the scraper 20 moves from the initial position to the forward position relative to the base 10, the scraper 20 can peel the printed three-dimensional printed part off the molding platform. When the scraper 20 moves out from the initial position, the upper end of the cleaning member 40 abuts against the surface of the scraper 20 and slides along the surface of the scraper 20, and the cleaning member 40 can be used to clean the residual resin on the scraper 20, so that the resin on the scraper 20 will not remain on the scraper 20 for a long time, thereby improving the scraper effect.

[0041] Furthermore, by providing the cleaning member 40 , the work of manually cleaning the scraper can be omitted, thereby improving work efficiency.

[0042] It should be noted that Figure 1 The positions of the two scrapers 20 in the figure are respectively an initial position and a forward position. The two scrapers in the figure are only for the convenience of illustration. The scraper mechanism in this embodiment includes one scraper 20.

[0043] In this embodiment, since the cleaning member 40 is made of a flexible material, when the upper end of the cleaning member 40 abuts against the surface of the scraper 20 and slides along the surface of the scraper 20, the cleaning member 40 undergoes elastic deformation, so that one end of the cleaning member 40 always abuts against the surface of the scraper 20, thereby improving the cleaning effect of the cleaning member 40 on the scraper 20. When the scraper 20 moves to separate from the cleaning member 40, the cleaning member 40 returns to a non-deformed state.

[0044] It should be noted that the cleaning member 40 is made of a flexible material, and the "flexible material" here means that the cleaning member 40 can be elastically deformed. In this embodiment, the cleaning member 40 is made of a rubber material, which has the advantages of low cost and long service life.

[0045] When the scraper 20 moves from the initial position to the forward position, the scraper 20 contacts the cleaning member 40, and the scraper 20 pushes the upright cleaning member 40 forward, causing the cleaning member 40 to deform elastically, so that the cleaning member 40 can be used to clean the resin, until the scraper 20 completely passes over the cleaning member 40, and the cleaning member 40 returns to the initial upright state. When the scraper 20 retreats from the forward position to the initial position, the rear side of the scraper 20 contacts the cleaning member 40, causing the cleaning member 40 to be pressed down. When the scraper 20 retreats to the initial position, it completely passes over the cleaning member 40, and the cleaning member 40 returns to the initial upright state, preparing for the next scraping.

[0046] It should be noted that, in the present embodiment, the scraper 20 is movably disposed on the base 10 in the transverse direction.

[0047] In one embodiment, a blade guide rail 11 is provided on the base 10 , and the blade mechanism further includes a blade seat 50 . The blade 20 is provided at one end of the blade seat 50 , and the blade seat 50 is slidably provided on the blade guide rail 11 in the transverse direction to enable the blade 20 to move relative to the base 10 .

[0048] Specifically, the blade 20 is equipped with a blade drive assembly, which includes a power module, a transmission module, a blade guide rail 11 and a blade seat 50. The blade is mounted on the blade seat 50, and the blade seat 50 is slidably connected to the blade guide rail 11. The blade drive assembly is transmission-connected to the blade seat 50 and is used to drive the blade seat 50 to drive the blade to move along the blade guide rail 11. Exemplarily, the blade drive assembly includes two blade guide rails 11 and two blade seats 50, the two blade seats 50 are arranged in parallel and spaced apart, the two blade seats 50 are respectively slidably connected to the two blade guide rails 11, and the two ends of the blade are respectively mounted on the two blade seats 50. Among them, the power module can be a driving component such as a motor, and the transmission module includes mechanisms such as a crawler, a synchronous belt, and a conveyor belt.

[0049] In this embodiment, when the blade 20 is in the initial position, one end of the cleaning member 40 protrudes or is flush with the surface of the blade 20. Since the blade itself is very sharp, by making one end of the cleaning member 40 protrude or be flush with the surface of the blade 20, the cleaning member 40 can be used to shield the blade 20 when the blade 20 is in the initial position. Specifically, when the printer is not working, the cleaning member 40 can shield the blade 20 to prevent the operator from accidentally touching the blade 20 and causing personal injury.

[0050] Among them, when the blade 20 is in the initial position, one end of the cleaning member 40 is inclined toward the direction close to the blade 20. When the blade 20 moves from the initial position to the forward position, the cleaning effect can be improved, and when the blade 20 is retracted, some resistance is reduced to facilitate the retraction of the blade.

[0051] In this embodiment, the scraper 20 has a blade 21, and when the scraper 20 is in the initial position, the blade 21 abuts against the side wall of the cleaning member 40. When the scraper 20 is in a stationary state at the initial position, the cleaning member 40 can also play a certain limiting role, and the scraper is not easy to slide.

[0052] like Figure 1 As shown, one side surface of the scraper 20 has an inclined surface 211, and the inclined surface 211 extends to the end of the scraper 20. When the scraper 20 moves out from the initial position, one end of the cleaning member 40 abuts against the inclined surface 211 and slides along the inclined surface 211. The resin on the scraper 20 is mainly concentrated on the inclined surface 211 of the scraper, so that one end of the cleaning member 40 slides along the inclined surface 211, which facilitates the use of the cleaning member 40 to clean the residual resin.

[0053] Specifically, the scraper has a first surface and a second surface disposed opposite to each other, and an inclined surface 211 connecting the first surface and the second surface. The angle between the inclined surface 211 and the first surface is an acute angle, and the inclined surface 211 area forms a blade 21 of the scraper. The blade 21 is used to contact the molding surface when the scraper slides on the molding surface of the molding platform. The first surface is used to face the molding surface when the scraper slides on the molding surface, and the second surface is used to face away from the molding surface when the scraper slides on the molding surface. The scraper includes two end portions disposed along the length direction, and the blade of the scraper is disposed between the two end portions.

[0054] In this embodiment, the blade 20 is tilted upward in the direction from the initial position to the forward position (the direction in which the blade 20 moves out of the initial position). When the blade 20 moves forward from the initial position, the blade 20 is not easy to scratch the cleaning member 40 because the blade 20 is tilted upward.

[0055] The thickness of the cleaning member 40 is between 2 mm and 6 mm. When the thickness of the cleaning member 40 is set within the above range, the cleaning member 40 has sufficient elasticity to facilitate cleaning of the residual resin, and the cleaning member 40 is not too thick, so that the cleaning member 40 can be easily restored to the initial upright state after being separated from the scraper 20.

[0056] Specifically, the thickness of the cleaning member 40 may be 2 mm, 4 mm, 6 mm, or any other value between 2 mm and 6 mm.

[0057] In this embodiment, the scraper mechanism further includes a liquid contact part 30, which is disposed on the base 10. When the scraper 20 is located at the initial position, the scraper 20 is located above the liquid contact part 30. Since the scraper 20 is located above the liquid contact part 30 when the scraper 20 is located at the initial position, the liquid contact part 30 can be used to receive the resin dripping from the scraper 20.

[0058] In this embodiment, the liquid receiving member 30 includes a liquid receiving groove 31 . The opening of the liquid receiving groove 31 faces upward, which has the advantages of a simple structure and is convenient for receiving liquid.

[0059] In order to facilitate understanding of the scraper mechanism provided in this embodiment, the following is explained in conjunction with the accompanying drawings and the use process:

[0060] like Figure 1 As shown, right in front of the initial position of the blade 20, because the blade 20 has an upward inclination angle, the resin on the blade 20 is mainly concentrated on the inclined surface 211 on the lower side of the blade.

[0061] like Figures 4 to 7 as well as Figures 12 to 15 As shown, when the scraper 20 moves from the initial position toward the forward position, the scraper 20 contacts the cleaning member 40. Since the scraper 20 is installed at an inclined angle, it will not scratch the cleaning member 40, and will push the elastic cleaning member 40 forward. Then the cleaning member 40 moves along the inclined surface 211 on the lower side of the scraper 20 to scrape off the residual resin thereon. The scraped resin will fall into the liquid contacting member 30. The scraper 20 continues to move forward, and the cleaning member 40 continues to be pressed downward until the scraper 20 completely passes over the cleaning member 40, and the cleaning member 40 returns to its initial upright state.

[0062] like Figures 8 to 11 As shown, when the blade 20 retreats from the forward position to the initial position, the rear side of the blade 20 contacts the cleaning member 40. When the blade 20 continues to move backward, the cleaning member 40 is pressed down at a larger angle. When the blade 20 retreats to the initial position, it completely passes over the cleaning member 40, and the cleaning member 40 returns to its initial upright state, preparing for the next shoveling.

[0063] It should be noted that the cleaning member provided in this embodiment is not limited to being installed in the upper-mounted scraper mechanism shown in the drawings, but can also be installed in other scraper mechanisms. For example, the scraper in the patent CN114734639B can also be adapted to install the cleaning member.

[0064] Another embodiment of the utility model provides a 3D printer, the 3D printer includes a scraper mechanism, and the scraper mechanism is the scraper mechanism provided above. Therefore, the 3D printer can also use the cleaning member 40 to remove the residual resin on the scraper 20, thereby improving the effect of the scraper.

[0065] The device provided by the embodiment has the following beneficial effects:

[0066] (1) The cleaning member 40 is used to remove the resin remaining on the scraper 20, so that the resin on the scraper 20 will not remain on the scraper 20 for a long time, thereby improving the effect of the scraper;

[0067] (2) When the printer is not working, the cleaning member 40 can shield the scraper 20 to prevent the operator from accidentally touching the scraper 20 and causing personal injury;

[0068] (3) One end of the cleaning member 40 is inclined toward the direction close to the blade 20, which can improve the cleaning effect when the blade 20 moves from the initial position to the forward position, and reduce some resistance when the blade 20 retracts to facilitate the retraction of the blade;

[0069] (4) When the scraper 20 is in a stationary state at the initial position, the scraper 20 abuts against the side wall of the cleaning member 40, and the cleaning member 40 can also play a certain limiting role, so the scraper is not easy to slide;

[0070] (5) When the scraper 20 moves forward from the initial position, since the scraper 20 is tilted upward, it is not easy for the scraper 20 to scratch the cleaning member 40.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0073] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0074] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0075] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0076] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A scraper mechanism, characterized in that: The scraper mechanism comprises: Base (10); A scraper (20) is movably arranged on the base (10), and the scraper (20) has an initial position relative to the base (10); The cleaning member (40) is arranged on a side close to the scraper (20); when the scraper (20) moves out from the initial position, one end of the cleaning member (40) abuts against the surface of the scraper (20) and slides along the surface of the scraper (20).

2. The scraper mechanism according to claim 1, characterized in that: When the scraper (20) is located at the initial position, one end of the cleaning member (40) protrudes from or is flush with the surface of the scraper (20).

3. The scraper mechanism according to claim 1, characterized in that: When the scraper (20) is located at the initial position, one end of the cleaning member (40) is inclined in a direction close to the scraper (20).

4. The scraper mechanism according to claim 1, characterized in that: The scraper (20) has a blade (21), and when the scraper (20) is located at the initial position, the blade (21) abuts against the side wall of the cleaning member (40).

5. The scraper mechanism according to claim 1, characterized in that: One side surface of the scraper (20) has an inclined surface (211), and the inclined surface (211) extends to the end of the scraper (20). When the scraper (20) moves out from the initial position, the upper end of the cleaning member (40) abuts against the inclined surface (211) and slides along the inclined surface (211).

6. The scraper mechanism according to claim 1, characterized in that: In the direction in which the scraper (20) moves out of the initial position, the scraper (20) is arranged to be tilted upward.

7. The scraper mechanism according to any one of claims 1 to 6, characterized in that: The thickness of the cleaning element (40) is between 2 mm and 6 mm.

8. The scraper mechanism according to any one of claims 1 to 6, characterized in that: The cleaning element (40) is made of a flexible material, and the flexible material includes a rubber material.

9. The scraper mechanism according to any one of claims 1 to 6, characterized in that: The scraper mechanism further comprises a liquid contacting part (30), wherein the liquid contacting part (30) is arranged on the base (10); when the scraper (20) is located at the initial position, the scraper (20) is located above the liquid contacting part (30); the liquid contacting part (30) comprises a liquid contacting groove (31), and the opening of the liquid contacting groove (31) faces upward.

10. A 3D printer, characterized in that: The 3D printer comprises a scraper mechanism, and the scraper mechanism is the scraper mechanism according to any one of claims 1 to 9.

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