A 3D printing structure, manufacturing method and application

Abstract

The invention belongs to the technical field of 3D printing, and discloses a 3D printing structure and a manufacturing method thereof. A fiber web is laid between layers of a printed part, and at least one side of the fiber web exceeds the width of the printing layer and is closely combined with the material of the printing layer. Together, the fiber web that exceeds the printing layer can hang down to cover the printing layer where the fiber web is laid, and have an appropriate amount of overlap with the fiber web that is laid on the lower printing layer of the printing layer; The fiber web outside the print is tightly bonded to the inner and outer surfaces of the print. The invention enables the fibers in the 3D printing structure to form an orderly three-dimensional grid connection distribution in the three dimensions of length, width and height of the printing body, thereby greatly improving the bonding strength of the 3D printing body in the X and Y directions, and It also greatly improves the bonding quality and strength in the Z direction between layers, and its overall stiffness, toughness and bonding quality are also greatly improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing structure, manufacturing method and application. Background technique [0002] At present, the closest existing technology: 3D printing has been applied more and more, but there are still many problems in the application process, especially in the 3D printing of non-metallic materials, there are generally poor interlayer bonding, strength Low, uneven surface, poor impact resistance, poor overall compactness and other issues. For some large-scale 3D printing, especially the 3D printing buildings that are emerging now, although many institutions add short fibers to the printing materials in order to improve the interlayer bonding force, it is hoped that the bonding strength between the printed body matrix material and the dispersed fibers can be improved. Overall performance, but due to the random distribution of short fibers and the limited bonding f...

AI Technical Summary

Problems solved by technology

[0005] In summary, the main problem in the prior art is: poor bonding between layers

[0006] For non-metallic 3D printing structures, there are generally low strength materials, and some have problems such as poor plasticity and toughness, which make the printed body poor in shear resistance and poor in overall impact resistance.

[0007] The existing FRP structure uses the composite of glass fiber and resin, and the production environment is poor

In addition, FRP cannot be recycled

[0008] The weight of the FRP structure is heavy, the toughness of the resin is poor, and the tolerance to damage is poor

[0009] For wall-like prints, the bonding strength between adjacent lines is poor, and its bonding quality is difficult to inspect (currently, most domestic printings use a thick layer of printing, resulting in a large waste of materials)

[0010] Difficulty in solving the above technical problems: Since 3D printing is a kind of additive manufacturing technology, it relies on layer-by-layer accumulation in the printing process to complete the printed product: for polymer materials, it is basically realized by welding, that is, new The accumulated material is heated to a molten state, and then deposited on the previous layer of solidified material or the original substrate. The molten material must move downward under the action of gravity, which makes the middle of the molten layer necessarily have a bulge. Phenomenon, forming surface unevenness

In addition, since 3D printing only accumulates the molten material on the solidified printing layer, it does not re-melt the solidified layer, so it is very easy to have defects such as poor fusion between layers

[0011] For 3D printing buildings, the new cement concrete is deposited on the concrete that has solidified to a certain extent and has a certain strength. Therefore, the bonding quality between layers is difficult to be guaranteed.

In addition, for 3D printing buildings, there is a common problem of wall cracking. The existing solution is to paste a layer of glass fiber mesh on the surface after the wall is completed, which also increases the production process and the pasted fiber mesh is also easy to peel off. The problem

[0012] The significance of solving the above technical problems: Due to the existence of the above difficulties, most of the 3D printing can only print some small items such as models, and it is difficult to achieve real large-scale industrial production with quality and quantity.

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