A method and realization device for improving the quality of FDM printing

Abstract

The invention relates to a method and a realization device for improving the quality of FDM printing. The method integrates vibration excitation and dot-matrix ball synchronous thermal compaction technology, and adopts the method of printing quality detection and feedback to comprehensively improve the forming quality in the process of printing wire material melting, printing part forming process and other stages; , synchronous compaction, quality inspection and other institutions. Through the vibration excitation mechanism, the fiber and the molten resin mixture are vibrated during the melting process of the wire, reducing the pores, improving the melt wettability of the resin and the fiber, and reducing the probability of plugging; the compaction mechanism with balls is used to improve the printing layer. The bonding strength between the two can be realized in any direction during the printing process, and the compaction temperature and the distance between the ball compaction surface and the printing surface can be precisely adjusted. In addition, through the quality inspection mechanism integrated at the nozzle outlet, the printing quality information can be obtained in real time, and the defects can be accurately located and judged, so as to optimize the printing parameters and reduce the rate of unqualified products.

Description

technical field [0001] The invention belongs to the cross field of additive manufacturing technology and composite materials, and in particular relates to a method and a realization device for improving the quality of FDM printing. Background technique [0002] The emergence and development of additive manufacturing technology has revolutionized the traditional manufacturing mode, which has the characteristics of rapid prototyping of complex parts and molds, and low cost. According to the division of printing process, it can be divided into Selective Laser Sintering (SLS), Three dimensional printing (3DP), Stereolithography (SLA), Fused Deposition Modeling (FDM) ), Laminated Object Manufacturing (LOM), etc., in which fiber-reinforced resin fused deposition 3D printing technology is a key part of additive manufacturing technology, which can realize short fiber, long fiber, continuous fiber reinforced resin composite materials It has a wide range of application prospects in a...

AI Technical Summary

Problems solved by technology

[0003] However, in the actual printing process, there are often gaps in the resin, and the fibers and resin are not fully infiltrated, which leads to low strength of the printed composite material; due to the layered manufacturing, the interlayer bonding is moved by the printing nozzle and extruded tow Bonding is achieved, there is inevitably a high temperature difference between the newly printed tow and the bottom layer, and there is a lack of compaction force between layers. These factors lead to weak bonding strength between layers, which seriously restricts its wider application.

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