Asynchronous 3D printing method and device with enhanced skeleton

Abstract

The invention discloses an asynchronous 3D printing method and device with an enhanced skeleton, and belongs to the technical field of 3D printing rapid forming. The asynchronous 3D printing method comprises the steps: a printed semi-finished product is printed through fused deposition modeling firstly, the printed semi-finished product is provided with an inner shape follow-up cavity with the upper side being open; then a molten material is injected into the inner shape follow-up cavity of the printed semi-finished product from an opening, and pressure maintaining is conducted till the moltenmaterial is solidified to form the enhanced skeleton; and finally a 3D printed product with the enhanced skeleton is prepared. The asynchronous 3D printing device comprises a printing injection assembly, melting plasticizing assemblies, a transitional connecting assembly, a three-dimensional mobile platform and a control system; and flow-dividing and elongation converging components are designedin screw rods of the melting plasticizing assemblies to conduct flow-dividing converging and elongation flowing on the material to ensure that under the condition of the small draw ratio of the screwrod, the material is effectively plasticized and molten, and the molten material is homogenized. The asynchronous 3D printing method and device can form the 3D printed product through the same material without the aid of any heterogeneous material insert or chemical additive, and the strength of the 3D printed product is improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing rapid prototyping, and in particular relates to an asynchronous 3D printing method and device with a reinforced skeleton. Background technique [0002] At present, 3D printing is mainly divided into fused deposition modeling, liquid photosensitive resin photocuring, selective laser sintering, selective laser melting and other technologies. Although the molding materials, molding principles and system characteristics of different types of 3D printing technologies are different, the basic principles are the same, all of which are "layer-by-layer manufacturing and layer-by-layer accumulation". It is easy to cause insufficient strength in the stacking direction. The existing 3D printing internal structure is superimposed on parallel layers. The original filling structure has at least one dimension in the three-dimensional direction and only relies on the weak adhesive force between the molten mat...

AI Technical Summary

Problems solved by technology

[0007] Therefore, the first technical problem to be solved by the present invention is to provide an asynchronous 3D printing method with a reinforced skeleton, without the use of external inserts or auxiliary The strength of 3D printing products can be significantly improved under the premise of the additive; with the same amount of materials, the tensile strength and shear strength of the product in the stacking direction can be enhanced, and the tensile strength and shear strength of other dimensions of the product can also be improved. Improvement to solve the technical problem of insufficient strength in the stacking direction of existing fused deposition modeling products

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