3D printing supporting structure

Abstract

The utility model discloses a 3D printing supporting structure, which belongs to the technical field of 3D printing and comprises a solid support and right-angled triangular block supports arranged on two sides of the upper portion of the solid support, and two right-angle sides of each block support are respectively connected with the side wall of the solid support and a cantilever structure portion of a 3D printing piece. And the lower end of the solid support is connected to a bottom foundation forming the cantilever structure part. Through the structural arrangement of the solid support and the block-shaped support, the support strength requirement is met, the risk that a product is warped due to insufficient support strength in the printing process is reduced, the lower bottom face of a 3D printing piece is prevented from making direct contact with the block-shaped support, the surface quality of the 3D printing piece is improved, the post-treatment polishing amount of the 3D printing piece is reduced, and the production cost is reduced. The post-processing efficiency is improved, the production progress is accelerated, the supporting weight is reduced, the powder use amount is reduced, and therefore the cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printing technology, and in particular relates to a 3D printing support structure. Background Technology

[0002] 3D printing, also known as additive manufacturing, is a technology that manufactures solid parts by adding materials layer by layer based on 3D CAD data. Since the material solidifies layer by layer during printing and needs to be stacked, the lower layers of the model are generally required to support the upper layers. However, in actual manufacturing, it has been found that slopes less than 45° cannot self-form. For 3D printed product structures that cannot self-form, supports need to be added to local surfaces, including solid and non-solid supports. Whether solid or non-solid, at least one end of the support must be connected to the 3D printed part. After printing is complete and the support is separated from the printed part, the remaining support on the surface of the printed part can affect its appearance and surface quality, and may even affect its normal use. Therefore, a support structure needs to be designed to solve this problem.

[0003] In the existing technology, the cited utility model patent authorization announcement number is CN209206458U, "A grid-shaped 3D printing support structure for metal additive manufacturing". In this solution, the grid-shaped support is generally inverted triangular in shape, including a hollow grid-shaped support and a solid support. The contact surface between the grid-shaped support and the molding substrate is the horizontal contact surface formed by removing the lower half of the bottom quadrilateral grid unit along the horizontal diagonal. The contact surface between the grid-shaped support and the support surface of the molded part is the horizontal contact surface formed by removing the upper half of the top quadrilateral grid unit along the horizontal diagonal. The solid support is triangular and fills the inverted triangular grid holes formed after the grid-shaped support contacts the support surface of the molded part. This solution uses a combination of grid-like and solid supports to support 3D printed parts. While it can meet the support requirements of some 3D printed parts, for 3D printed parts with higher support strength requirements, relying solely on solid supports on the upper and lower contact surfaces plus grid-like supports to distribute pressure is clearly insufficient. In addition, when the workpiece has a large height-to-width ratio, the overall inverted triangular design of the grid-like supports in this solution is not material-saving enough. Summary of the Invention

[0004] The purpose of this invention is to provide a 3D printing support structure. By combining solid and block supports, the strength requirements of the support are met, reducing the risk of warping during product printing due to insufficient support strength. It also avoids direct contact between the bottom surface of the 3D printed part and the block support, improving the surface quality of the 3D printed part, reducing the amount of post-processing polishing, increasing post-processing efficiency, accelerating the production process, reducing support weight, and reducing powder usage, thereby lowering costs.

[0005] To achieve the above objectives, the technical solution of this utility model is to provide a 3D printing support structure, the support structure including a solid support and right-angled triangular block supports disposed on both sides of the upper part of the solid support, the two right-angled sides of the block supports being connected to the side wall of the solid support and the cantilever structure part of the 3D printed part, respectively; the lower end of the solid support is connected to the bottom foundation forming the cantilever structure part.

[0006] As a further improvement of this utility model, the bottom base is the base plate that the 3D printed part itself has.

[0007] As a further improvement of this utility model, the solid support is provided with an elongated through hole in the middle.

[0008] As a further improvement of this utility model, the block support is densely covered with elongated pores.

[0009] As a further improvement of this utility model, the angle between the outer inclined surface of the block support and the horizontal plane is not less than 45°.

[0010] As a further improvement of this utility model, the two block supports are symmetrical about the solid support.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the structural design of solid support and block support meets the strength requirements of the support, reduces the risk of product warping due to insufficient support strength during the printing process, avoids direct contact between the bottom surface of the 3D printed part and the block support, improves the surface quality of the 3D printed part, reduces the amount of post-processing polishing of the 3D printed part, improves post-processing efficiency, speeds up the production progress, reduces the support weight, reduces the amount of powder used, and thus reduces costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the 3D printed support component of the 3D printed support structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the solid support of the 3D printed support structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the block support of the 3D printed support structure of this utility model.

[0015] The following are the annotations for the 3D printed parts: 1 represents solid support, 11 represents through hole, 2 represents block support, 21 represents pore, and 3 represents 3D printed part. Detailed Implementation

[0016] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1 As shown, this utility model discloses a 3D printing support structure, which includes a solid support 1 and right-angled triangular block supports 2 disposed on both sides of the upper part of the solid support 1. The two right-angled sides of the block supports 2 are respectively connected to the side wall of the solid support 1 and the cantilever structure part of the 3D printed part 3; the lower end of the solid support 1 is connected to the bottom base forming the cantilever structure part.

[0018] In the above technical solution, the bottom of the solid support 1 can be supported on the base plate or molding substrate of the 3D printed part 3 itself. The block support 2 transmits the pressure from the cantilever structure at its top to the solid support 1, and the pressure is distributed to the base plate or molding substrate through the solid support 1. This design can meet the requirements of higher support strength. The design that the two right-angled sides of the block support 2 are connected to the side wall of the solid support 1 and the cantilever structure of the 3D printed part 3 respectively can minimize the direct contact between the block support 2 and the 3D printed part 3, improve the surface quality of the 3D printed part 3, reduce the amount of post-processing and polishing of the 3D printed part 3, improve post-processing efficiency, speed up the production progress, and save materials.

[0019] Furthermore, such as Figure 2 and Figure 3 As shown, the solid support 1 has a long strip-shaped through hole 11 in the middle, and the block support 2 is densely covered with long strip-shaped holes 21. This design can save printing material.

[0020] Furthermore, the angle between the outer inclined surface of the block support 2 and the horizontal plane is not less than 45°. This support structure is suitable for products with a width-to-height ratio of not more than 2, because when it is greater than 2, the angle between the outer inclined surface of the block support 2 and the horizontal plane will be less than 45°, which will cause the outer inclined surface of the block support 2 to be unable to form itself.

[0021] Furthermore, the two block supports 2 can be symmetrical about the solid support 1, or they can be asymmetrical, as long as the angle between the outer inclined surface of the block support 2 and the horizontal plane is not less than 45°.

[0022] Preferably, the two block supports 2 are symmetrical about the solid support 1, which makes the support stable and saves printing material.

[0023] In summary, the structural design using both solid and block supports satisfies the strength requirements of the supports, reduces the risk of warping during product printing due to insufficient support strength, avoids direct contact between the bottom surface of the 3D printed part and the block support, improves the surface quality of the 3D printed part, reduces the amount of post-processing polishing, improves post-processing efficiency, speeds up the production process, reduces support weight, reduces powder usage, and thus reduces costs.

[0024] The above embodiments describe the present invention, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A 3D printed support structure, characterized in that: The support structure includes a solid support (1) and a right-angled triangular block support (2) disposed on both sides of the upper part of the solid support (1). The two right-angled sides of the block support (2) are respectively connected to the side wall of the solid support (1) and the cantilever structure of the 3D printed part (3). The lower end of the solid support (1) is connected to the bottom foundation of the part forming the cantilever structure.

2. The 3D printing support structure according to claim 1, characterized in that: The bottom base is the base plate that the 3D printed part (3) itself has.

3. The 3D printing support structure according to claim 2, characterized in that: The solid support (1) has a long strip-shaped through hole (11) in the middle.

4. The 3D printing support structure according to claim 3, characterized in that: The block support (2) is densely covered with elongated pores (21).

5. The 3D printing support structure according to claim 4, characterized in that: The angle between the outer inclined surface of the block support (2) and the horizontal plane is not less than 45°.

6. The 3D printing support structure according to claim 1, characterized in that: The two block supports (2) are symmetrical about the solid support (1) from left to right.

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