Combined large-size polymer 3D printing post-processing device

Abstract

The combined type large-size polymer 3D printing post-processing device comprises a plurality of heating plates, the multiple heating plates are spliced and connected to form a combined type frame-shaped structure, and the bottom of the frame-shaped structure is an opening end; according to the combined post-processing device, instant heat treatment after large-size polymer printing is completed can be achieved, deformation of a large-size polymer printing piece is reduced, during post-processing of the printing piece, the combined post-processing device and the printing piece are not restrained mutually, residual stress of the printing piece can be freely released, and the printing piece cannot be extruded and deformed by external force.

Description

technical field [0001] The invention belongs to the field of 3D printing, in particular to a combined large-size polymer 3D printing post-processing device. Background technique [0002] Fused deposition modeling (FDM) is a widely used polymer 3D printing technology. In this additive manufacturing technology, the plastic polymer is heated and melted in the form of a melt and adhered to a predetermined printing position, and the printed product is finally formed by the melt layer by layer. [0003] During this process, as the molten polymer of the front print layer cools and solidifies on the upper surface of the underlying polymer, shrinkage occurs, but due to the constraints of the hardened structure below, this shrinkage can cause layer-to-layer formation Shear force, or residual stress, can be extremely destructive layer by layer and can cause parts to deform, roll up their edges, or even break away from supports. [0004] Generally, the bonding effect between the print...

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Problems solved by technology

[0008] 2. The polymer 3D printing post-processing method introduced in "A 3D Printing Post-processing Process Based on FDM Technology" is to make up for the deformation by reserving a processing allowance, and at the same time increase the bonding force between the printed part and the substrate during the printing process to suppress Deformation, the method of direct machining after printing is completed to achieve the required size and surface accuracy. In fact, when the size of the part is relatively large (above 1m) and the structure is relatively easy to deform, it is often impossible to reserve the processing allowance method to compensate for deformation;

[0009] 3. In the prior art, there is also a heat treatment method to reduce the residual stress, but generally the workpiece is removed, or put into a heating container together with the substrate for post-processing, but when the workpiece is large, it is inconvenient to remove ( Generally, the substrate is fixed), and after removal and post-processing in an unconstrained state, deformation will still occur under the action of residual stress, resulting in poor dimensional accuracy

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