Multistage-temperature-control-based fused deposition modeling (FDM) type 3D printing sprayer and temperature control method

Abstract

The invention relates to a 3D printing technology, and aims at providing a multistage-temperature-control-based fused deposition modeling (FDM) type 3D printing sprayer and a temperature control method. The multistage-temperature-control-based FDM 3D printing sprayer comprises a printing sprayer body and a heating device arranged at the outer part of the printing sprayer body, and is characterized in that a forming chamber inside the printing sprayer body is divided into four parts of a fuse feeding section, a transition section, a fusion section and a printing and extruding section; the heating device is divided into three sections which are correspondingly arranged at the outer sides of the transition section, the fusion section and the printing and extruding section of the forming chamber, and each section of the heating device comprises an electric heater and a temperature sensor which are independent and is respectively connected with a multistage temperature control module of an FDM type printing sprayer through a signal wire. The multistage-temperature-control-based FDM type 3D printing sprayer is capable of realizing the corresponding gradient control of temperatures of all sections of the printing sprayer and ensuring that an FDM printing material is always kept in a printable state, and can not cause the problems of layer collapse, damage and blockage due to overhigh or overlow temperature due to the adoption of single temperature control; and meanwhile, the blockage and the fracture of a wire of a conventional printing head are avoided, and the quality of formed products is improved.

Description

technical field [0001] The present invention relates to 3D printing technology, in particular to a Fused Deposition Modeling (FDM) printing device and a control method. In more detail, the present invention relates to a new printing nozzle for fused filament deposition molding 3D printing, which is equipped with multi-stage temperature control to prevent broken filaments, clogging and overflow problems. Background technique [0002] Fused Deposition Modeling (FDM), also known as Fused Deposition Modeling (FDM) 3D molding, FDM molding, FDM 3D molding, FDM printing or FDM 3D printing, is currently the fastest growing and most promising rapid Forming technology, also known as one of the 3D printing forming technologies. The working principle of fused deposition modeling is to melt hot-melt materials (such as ABS, wax, etc.) through a heater, and the materials are first drawn into filaments for printing. Then the FDM molding equipment sends the filamentary printing material in...

AI Technical Summary

Problems solved by technology

[0007] If the nozzle temperature is too low and the material tends to be solid, the increase of material viscosity will increase the extrusion friction resistance and slow down the extrusion speed, which not only increases the burden on the extrusion system, but also causes nozzle blockage in extreme cases, and the material layer If the interlayer bonding strength is reduced, it will also cause interlayer peeling; if the temperature is too high, the material will tend to be liquid, appear brown, the material molecules will break, the viscosity coefficient will become smaller, and the fluidity will be strong. The surface of the silk is rough, and there will be collapse and damage of the processed layer

[0008] What is more critical is that during the printing process of fused filament deposition modeling (FDM), there are often pauses to realize the transfer of printing paths, the replacement of print nozzles to print support spaces, etc., so that during the pause time of normal printing due to the fusion If there is too much printing material, there will be an overflow problem. If the time is too long, the material close to the inlet of the wire will cool down, and there will be serious faults such as clogging the printing nozzle and broken wire, which will cause the printing process to fail and affect the quality of the printed product.

Images