Scraper assembly and 3D printing equipment

Abstract

The utility model discloses a scraper assembly and 3D printing equipment, the scraper assembly comprises a scraper mounting rack and a scraper body installed below the scraper mounting rack, the scraper mounting rack comprises a scraper bottom plate and a scraper pressing plate which are detachably installed, a first abutting part is arranged below the scraper bottom plate, and a second abutting part is arranged below the scraper pressing plate. A first abutting part is arranged below the scraper pressing plate, a second abutting part is arranged below the scraper pressing plate, a first mounting groove facing the scraper pressing plate is formed above the first abutting part, a second mounting groove facing the scraper bottom plate is formed above the second abutting part, the scraper body comprises a mounting part, a wing part and a scraper part, the mounting part is located in the first mounting groove and the second mounting groove, and the wing part is located in the second mounting groove. The wing part is located below the scraper installation frame and abuts against the first abutting part and the second abutting part, and the scraper part is located below the wing part. According to the utility model, the scraper body can be stably fixed, meanwhile, the scraper body is prevented from being deformed and bulged, and the production efficiency is improved.

Description

Technical Field

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

[0002] 3D printing technology is an additive manufacturing technology that can achieve rapid prototyping of objects. 3D printing equipment is a device that uses 3D printing technology, based on digital model files, using powder, filament, paste and other materials to print three-dimensional objects layer by layer.

[0003] As one of the important components of 3D printing equipment, the scraper assembly plays a vital role in the 3D printing process. During the 3D printing process, the scraper assembly is responsible for evenly scraping the printing material on the printing platform to ensure that the thickness of the printing layer is uniform, thereby ensuring the printing quality and accuracy. The scraper body in the scraper assembly is the part that is in direct contact with the printing material and the printing platform. Therefore, in order to avoid damage to the printing platform and the printed object, the shape and angle of the scraper body need to be reasonably designed. At the same time, the flatness of the scraper body also needs to be checked regularly so that the scraper body can be adjusted and replaced to ensure the printing quality.

[0004] With the continuous development of 3D printing technology, the accuracy of the scraper assembly is also constantly improving. By optimizing the scraper assembly, the printing accuracy and efficiency can be further improved. The scraper assembly in the prior art fixes the scraper body by means of a scraper mounting frame and a pressure plate. When the pressure is small, the scraper body is easy to loosen, and when the pressure is large, the scraper body will deform and bulge. At the same time, the 3D printing equipment will have local burrs on the printing surface during the scanning process. The scraper body is prone to wear during operation and must be replaced to ensure the continuation of the printing process. This process must ensure that the height of the scraper part is consistent before and after the replacement. Because the scraper body in the prior art is deformed when pressed, it is impossible to ensure the height consistency before and after the replacement, resulting in changes in the height of the printed material and printing failure.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a scraper assembly and a 3D printing device. Utility Model Content

[0006] The utility model aims to provide a scraper assembly and a 3D printing device, which can ensure that the scraper body is stably installed without deformation or bulging.

[0007] In order to achieve the above purpose, the technical solution provided by an embodiment of the present utility model is as follows:

[0008] A scraper assembly, the scraper assembly comprising a scraper mounting frame and a scraper body mounted below the scraper mounting frame, the scraper mounting frame comprising a detachably mounted scraper base plate and a scraper pressing plate, a first abutting portion being provided below the scraper base plate, a second abutting portion being provided below the scraper pressing plate, a first mounting groove being provided above the first abutting portion facing the scraper pressing plate, a second mounting groove being provided above the second abutting portion facing the scraper base plate, the first abutting portion and the second abutting portion being arranged opposite to each other, the first mounting groove and the second mounting groove being arranged opposite to each other, the scraper body comprising a mounting portion, a wing portion and a scraper portion, the mounting portion being located in the first mounting groove and the second mounting groove, the wing portion being located below the scraper mounting frame and abutting against the first abutting portion and the second abutting portion, and the scraper portion being located below the wing portion.

[0009] In one embodiment, the first mounting groove includes a first receiving groove, the second mounting groove includes a second receiving groove, the mounting portion includes a receiving portion, the receiving portion includes a main body portion and protruding portions located on both sides of the main body portion, the protruding portions are located in the first receiving groove and the second receiving groove, and the width of the protruding portions gradually decreases in a direction away from the main body portion.

[0010] In one embodiment, the receiving groove includes a first receiving surface and a second receiving surface, and the protrusion includes a first inclined surface and a second inclined surface, the first inclined surface abuts against the first receiving surface, and the second inclined surface abuts against the second receiving surface.

[0011] In one embodiment, the first installation groove further includes a first groove located above the first receiving groove, the second installation groove further includes a second groove located above the second receiving groove, and the installation portion further includes an end portion located above the receiving portion, and the end portion is located in the first groove and the second groove.

[0012] In one embodiment, a connecting portion is further included between the accommodating portion and the wing portion, the wing portion includes a third inclined surface and a fourth inclined surface facing the mounting portion, the first abutting portion includes a first abutting surface and a second abutting surface, the second abutting portion includes a third abutting surface and a fourth abutting surface, the first abutting surface and the third abutting surface are relatively arranged on both sides of the connecting portion, the second abutting surface abuts against the third inclined surface, and the fourth abutting surface abuts against the fourth inclined surface.

[0013] In one embodiment, the third inclined surface and the fourth inclined surface are symmetrical to each other, and the included angle between the third inclined surface and the side wall of the wing portion is 120° to 130°.

[0014] In one embodiment, the scraper body comprises:

[0015] In a first state, the height of the connecting portion is a first height, and the width of the connecting portion is a first width;

[0016] In the second state, the height of the connecting portion is the second height, the width of the connecting portion is the second width, the first abutting surface and the third abutting surface respectively abut against the two side walls of the connecting portion, the second height is greater than the first height, and the second width is less than the first width. In the process of converting from the first state to the second state, the scraper portion and the wing portion remain unchanged.

[0017] In one embodiment, the feature is that the bottom surface of the scraper portion is a plane.

[0018] In one embodiment, it is characterized in that the side wall of the scraper portion gradually decreases in the direction away from the wing portion, and the angle between the two side walls of the scraper portion is 10° to 30°.

[0019] Another embodiment of the present invention provides a technical solution as follows:

[0020] A 3D printing device comprises the scraper assembly mentioned above.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The scraper assembly of the utility model adopts the combined design of the scraper body and the scraper mounting frame. When the scraper body is pressed by the scraper bottom plate and the scraper pressing plate, the horizontal pressure is converted into a pulling force in the vertical direction. While the scraper body is firmly fixed, the deformation of the scraper body is controlled above the wing part, and the scraper part will not be deformed. After the scraper body is replaced, the height of the scraper part can remain unchanged, thereby ensuring the consistency of the height of the printed material and obtaining a better printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the scraper assembly in Comparative Example 1 of the present utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the scraper assembly in Example 1 of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the scraper body in Example 1 of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the scraper bottom plate in Example 1 of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the scraper pressure plate in Example 1 of the utility model.

[0029] Description of main reference numerals:

[0030] 11-scraper bottom plate, 111-first abutting portion, 1111-first abutting surface, 1112-second abutting surface, 112-first mounting groove, 1121-first groove, 1122-first receiving groove, 12-scraper pressing plate, 121-second abutting portion, 1211-third abutting surface, 1212-fourth abutting surface, 122-second mounting groove, 1221-second groove, 1222-second receiving groove, 20-scraper body, 201-mounting portion, 2011-end portion, 2012-receiving portion, 20121-main body, 20122-raised portion, 201221-first inclined surface, 201222-second inclined surface, 203-connecting portion, 204-wing portion, 2041-third inclined surface, 2042-fourth inclined surface. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] Comparative Example 1:

[0033] Ginseng Figure 1 As shown, the scraper assembly in this comparative example includes a scraper mounting frame and a scraper body 20 installed under the scraper mounting frame, the scraper mounting frame includes a detachable scraper base plate 11 and a scraper pressing plate 12, a first abutting portion 111 is provided below the scraper base plate 11, a second abutting portion 121 is provided below the scraper pressing plate 12, a first mounting groove 112 facing the scraper pressing plate 12 is provided above the first abutting portion 111, a second mounting groove 122 facing the scraper base plate 11 is provided above the second abutting portion 121, the first abutting portion 111 and the second abutting portion 121 are arranged opposite to each other, the first mounting groove 112 and the second mounting groove 122 are arranged opposite to each other, the scraper body 20 includes a strip-shaped mounting portion 201 and a scraper portion 202 integrally formed at the bottom of the mounting portion 201, the width of the scraper portion 202 gradually decreases in a direction away from the bottom of the mounting portion 201, and the scraper portion 202 abuts against the first abutting portion 111 and the second abutting portion 121.

[0034] In this comparative example, a connecting portion 203 is further provided between the mounting portion 201 and the scraper portion 202 of the scraper body 20 . The mounting portion 201 , the connecting portion 203 and the scraper portion 202 are integrally formed, and the maximum width of the scraper portion 202 is the same as the width of the connecting portion 203 .

[0035] Specifically, the first abutting portion 111 includes a first abutting surface 1111 and a second abutting surface 1112, and the second abutting portion 121 includes a third abutting surface 1211 and a fourth abutting surface 1212. The first abutting surface 1111 and the third abutting surface 1211 respectively abut against the two side walls of the connecting portion 203, and the second abutting surface 1112 and the fourth abutting surface 1212 respectively abut against the two side walls of the scraper portion 202.

[0036] In this comparative example, the material of the scraper body 20 is rubber, and the scraper part 202 is thick at the top and thin at the bottom. The thicker upper end of the scraper part provides a certain support force for pushing the printing material, and the blade part at the lower end can ensure the uniformity of the thickness and density of the printing material, and has an avoidance function when in use.

[0037] However, in this embodiment, the scraper assembly uses the scraper bottom plate 11 and the scraper pressure plate 12 to fix the scraper body 20. When the pressure is small, the scraper body 20 is easy to loosen, and when the pressure is large, the scraper body 20 will deform and bulge. This will directly affect the surface quality, dimensional accuracy and production efficiency of the printed part. At the same time, when the scraper body 20 in this embodiment is maintained or replaced, it cannot be guaranteed that the deformation of the scraper body 20 after replacement is consistent with that before replacement, resulting in changes in the height of the printed material, affecting the printing effect.

[0038] Embodiment 1:

[0039] Ginseng Figure 2 As shown, the scraper assembly in this embodiment includes a scraper mounting frame and a scraper blade body 20 installed below the scraper mounting frame, the scraper mounting frame includes a scraper base plate 11 and a scraper pressing plate 12 that can be detachably installed, a first abutting portion 111 is provided below the scraper base plate 11, a second abutting portion 121 is provided below the scraper pressing plate 12, a first mounting groove 112 is provided above the first abutting portion 111 and faces the scraper pressing plate 12, a second abutting portion 121 is provided above the second abutting portion 121 and faces the scraper base plate 11 The mounting groove 122, the first abutting portion 111 and the second abutting portion 121 are arranged opposite to each other, the first mounting groove 112 and the second mounting groove 122 are arranged opposite to each other, the scraper body 20 includes a mounting portion 201, a wing portion 204 and a scraper portion 202, the mounting portion 201 is located in the first mounting groove 112 and the second mounting groove 122, the wing portion 204 is located below the scraper mounting frame and abuts against the first abutting portion 111 and the second abutting portion 121, and the scraper portion 202 is located below the wing portion 204.

[0040] Ginseng Figure 3As shown, the mounting portion 201 of the scraper body 20 in this embodiment includes an end portion 2011 and a receiving portion 2012 from top to bottom, and the receiving portion 2012 includes a main body 20121 and protrusions 20122 located on both sides of the main body 20121.

[0041] Exemplarily, the shape of the longitudinal section of the end 2011 may be a boss shape or a trapezoid. In other embodiments, the shape of the longitudinal section of the end 2011 may be any other shape. In this embodiment, the shape of the longitudinal section of the end 2011 is a boss shape.

[0042] Furthermore, both sides of the main body 20121 include at least one protrusion 20122 , and the positions of the protrusions 20122 on both sides of the main body 20121 correspond to each other. By way of example, in this embodiment, both sides of the main body 20121 include two protrusions 20122 .

[0043] Furthermore, the width of the protrusion 20122 gradually decreases in a direction away from the main body, and the protrusion 20122 includes a first inclined surface 201221 and a second inclined surface 201222 .

[0044] Exemplarily, the shape of the longitudinal section of the protrusion 20122 is a triangle or a trapezoid. In this embodiment, the shape of the longitudinal section of the protrusion 20122 is a triangle.

[0045] Furthermore, a connecting portion 203 is also included between the accommodating portion 2012 and the wing portion 204 , the top of the connecting portion 203 is connected to the bottom of the protruding portion 20122 , the bottom of the connecting portion 203 is connected to the top of the wing portion 504 , and the width of the connecting portion 203 is the same as the width of the main body portion 20121 .

[0046] Furthermore, the wing portion 204 includes a third inclined surface 2041 and a fourth inclined surface 2042 facing the mounting portion 201 and symmetrical to each other. The included angle between the third inclined surface 2041 and the side wall of the wing portion 204 is 120° to 130°, preferably 120°.

[0047] Exemplarily, the wing portion 204 further includes two arcs facing the scraper portion 202 and symmetrical to each other and concave toward the center, and two ends of the arcs are respectively connected to the side wall of the wing portion 204 and the side wall of the scraper portion 202 .

[0048] Furthermore, the width of the scraper portion 202 gradually decreases in a direction away from the wing portion 204, and the angle between the two side walls of the scraper portion 202 is 10° to 30°, preferably 10°.

[0049] Specifically, the two side walls of the scraper portion 202 are arranged at a certain angle rather than being arranged vertically, so that during operation, the force can be decomposed into downward pressure in the vertical direction and thrust in the horizontal direction, thereby better compacting the printing material and making the printing material evenly distributed on the printing platform.

[0050] Exemplarily, the bottom surface of the scraper portion 202 is a plane, and two corner ends of the bottom of the scraper portion 202 are provided with rounded chamfers. The bottom surface of the plane structure is more conducive to flattening the printing material.

[0051] The scraper body 20 in this embodiment is made of rubber and is integrally formed by extrusion.

[0052] Ginseng Figure 4 Combined with Figure 5 As shown, the first installation groove 112 includes a first groove 1121 and a first receiving groove 1122, the first groove 1121 is located above the first receiving groove 1122, and the bottom of the first receiving groove 1122 is connected to the top of the first abutment portion 111, and the second installation groove 122 includes a second groove 1221 and a second receiving groove 1222, the second groove 1221 is located above the second receiving groove 1222, and the bottom of the second receiving groove 1222 is connected to the top of the second abutment portion 121, the position of the first groove 1121 corresponds to the position of the second groove 1221, and the position of the first receiving groove 1122 corresponds to the position of the second receiving groove 1222.

[0053] Exemplarily, the height of the first groove 1121 and the second groove 1221 is greater than the height of the end portion 2011 , so that when the scraper blade body 20 is pressed, a deformation space is reserved for the scraper blade body 20 .

[0054] Combination Figure 2 As shown, in the scraper assembly, the end 2011 of the scraper body 20 is located in the first groove 1121 and the second groove 1221 .

[0055] Exemplarily, the first installation slot 112 in this embodiment includes two first receiving slots 1122 , and the second installation slot 122 includes two second receiving slots 1222 , and each receiving slot includes a first receiving surface and a second receiving surface.

[0056] Combination Figure 2 As shown, in the scraper assembly, the raised portion 20122 of the scraper body 20 is located in the first receiving groove 1122 and the second receiving groove 1222, the first inclined surface 201221 abuts against the first receiving surface, and the second inclined surface 201222 abuts against the second receiving surface.

[0057] It should be understood that the shapes of the first groove 1121 and the second groove 1221 must correspond to the shape of the end 2011, and the shapes and numbers of the first receiving groove 1122 and the second receiving groove 1222 must correspond to the design of the protrusion 20122 in the scraper body 20, so as to achieve the effect of firmly fixing the scraper body 20.

[0058] Further, the first abutting portion 111 includes a first abutting surface 1111 and a second abutting surface 1112 , and the second abutting portion 121 includes a third abutting surface 1211 and a fourth abutting surface 1212 .

[0059] Specifically, combined Figure 2 As shown, the first abutting surface 1111 and the third abutting surface 1211 are disposed oppositely on two sides of the connecting portion 203 , the second abutting surface 1112 abuts against the third inclined surface 2041 , and the fourth abutting surface 1212 abuts against the fourth inclined surface 2042 .

[0060] It should be understood that the design of the first abutting surface 1111 and the third abutting surface 1211 needs to correspond to the design of the connecting portion 203, so that when the scraper body 20 is pressed, the first abutting surface 1111 and the third abutting surface 1211 respectively fit with the two side walls of the connecting portion 203; the design of the second abutting surface 1112 and the fourth abutting surface 1212 needs to correspond to the design of the wing portion 204, so that when the scraper body 20 is pressed, the second abutting surface 1112 fits with the third inclined surface 2041, and the fourth abutting surface 1212 fits with the fourth inclined surface 2042.

[0061] Furthermore, when the scraper assembly is working, the scraper portion 202 is in direct contact with the printing material and the printing platform, and the scraper body 20 will be subjected to lateral resistance and upward pressure. The first abutment surface 1111 and the third abutment surface 1211 respectively abut against the two side walls of the connecting portion 203, providing support force for the scraper body 20, thereby preventing the scraper body 20 from deforming.

[0062] Furthermore, the scraper body 20 in the utility model includes two states:

[0063] A first state, in which the scraper body 20 is not pressed, the height of the connecting portion 203 is a first height, and the width of the connecting portion 203 is a first width;

[0064] The second state is the state when the scraper body 20 is pressed. In this state, the first abutting surface 1111 and the third abutting surface 1211 respectively abut against the two side walls of the connecting part 203, the height of the connecting part 203 is the second height, the width of the connecting part 203 is the second width, the second height is greater than the first height, and the second width is less than the first width.

[0065] It is worth noting that in the second state, the scraper portion 202 and the wing portion 204 of the scraper body 20 do not deform, that is, during the transition from the first state to the second state, the scraper portion 202 and the wing portion 204 remain unchanged.

[0066] Specifically, when the scraper assembly of the utility model presses the scraper body 20 through the scraper base plate 11 and the scraper pressure plate 12, the protrusion 20122 can decompose the force when subjected to horizontal flat pressure, provide an upward pulling force, and the second abutting surface 1112 and the fourth abutting surface 1212 respectively abut against the third inclined surface 2041 and the fourth inclined surface 2042, providing a downward pulling force. Under the action of the upper and lower pulling forces, the connecting part 203 is deformed, and at the same time, the connecting part 203 will also exert an elastic force to the outside in order to restore its original state, thereby further tightening and fitting the scraper body 20 with the scraper base plate 11 and the scraper pressure plate 12, and controlling the deformation area above the wing 204.

[0067] Furthermore, the scraper body 20 and the scraper mounting frame in this embodiment are manufactured separately, which has low cost, high precision and is easy to replace.

[0068] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0069] The scraper assembly of the utility model adopts the combined design of the scraper body and the scraper mounting frame. When the scraper body is pressed by the scraper bottom plate and the scraper pressing plate, the horizontal pressure is converted into a pulling force in the vertical direction. While the scraper body is firmly fixed, the deformation of the scraper body is controlled above the wing part, and the scraper part will not be deformed. After the scraper body is replaced, the height of the scraper part can remain unchanged, thereby ensuring the consistency of the height of the printed material and obtaining a better printing effect.

[0070] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A scraper assembly, characterized in that: The scraper assembly includes a scraper mounting frame and a scraper body installed below the scraper mounting frame, the scraper mounting frame includes a detachably mounted scraper base plate and a scraper pressing plate, a first abutting portion is provided below the scraper base plate, a second abutting portion is provided below the scraper pressing plate, a first mounting groove facing the scraper pressing plate is provided above the first abutting portion, a second mounting groove facing the scraper base plate is provided above the second abutting portion, the first abutting portion and the second abutting portion are arranged opposite to each other, and the first mounting groove and the second mounting groove are arranged opposite to each other, the scraper body includes a mounting portion, a wing portion and a scraper portion, the mounting portion is located in the first mounting groove and the second mounting groove, the wing portion is located below the scraper mounting frame and abuts against the first abutting portion and the second abutting portion, and the scraper portion is located below the wing portion.

2. The scraper assembly according to claim 1, characterized in that: The first installation groove includes a first receiving groove, the second installation groove includes a second receiving groove, the installation portion includes a receiving portion, the receiving portion includes a main body portion and protruding portions located on both sides of the main body portion, the protruding portions are located in the first receiving groove and the second receiving groove, and the width of the protruding portions gradually decreases in the direction away from the main body portion.

3. The scraper assembly according to claim 2, characterized in that: The receiving groove includes a first receiving surface and a second receiving surface, and the protruding portion includes a first inclined surface and a second inclined surface, the first inclined surface abuts against the first receiving surface, and the second inclined surface abuts against the second receiving surface.

4. The scraper assembly according to claim 2, characterized in that: The first installation slot also includes a first groove located above the first receiving slot, the second installation slot also includes a second groove located above the second receiving slot, and the installation portion also includes an end portion located above the receiving portion, and the end portion is located in the first groove and the second groove.

5. The scraper assembly according to claim 2, characterized in that: A connecting portion is also included between the accommodating portion and the wing portion, the wing portion includes a third inclined surface and a fourth inclined surface facing the mounting portion, the first abutting portion includes a first abutting surface and a second abutting surface, the second abutting portion includes a third abutting surface and a fourth abutting surface, the first abutting surface and the third abutting surface are relatively arranged on both sides of the connecting portion, the second abutting surface abuts against the third inclined surface, and the fourth abutting surface abuts against the fourth inclined surface.

6. The scraper assembly according to claim 5, characterized in that: The third inclined surface and the fourth inclined surface are symmetrical to each other, and the included angle between the third inclined surface and the side wall of the wing portion is 120° to 130°.

7. The scraper assembly according to claim 6, characterized in that: The scraper body comprises: In a first state, the height of the connecting portion is a first height, and the width of the connecting portion is a first width; In the second state, the height of the connecting portion is the second height, the width of the connecting portion is the second width, the first abutting surface and the third abutting surface respectively abut against the two side walls of the connecting portion, the second height is greater than the first height, and the second width is less than the first width. In the process of converting from the first state to the second state, the scraper portion and the wing portion remain unchanged.

8. The scraper assembly according to claim 1, characterized in that: The bottom surface of the scraper portion is a plane.

9. The scraper assembly according to claim 1, characterized in that: The side wall of the scraper portion gradually decreases in a direction away from the wing portion, and the angle between the two side walls of the scraper portion is 10° to 30°.

10. A 3D printing device, characterized in that: The 3D printing device comprises the scraper assembly according to any one of claims 1 to 9.

Images