Anti-blocking printing spraying head of FDM three-dimensional printer

Abstract

The invention discloses an anti-blocking printing spraying head of an FDM three-dimensional printer. The anti-blocking printing spraying head comprises a printing spraying head body, a heating aluminum block, an electric heating pipe, a heating temperature control mainboard, a heating temperature sensor, a feeding pipe and a feeding machine. The anti-blocking printing spraying head is characterized in that the thin-type heating aluminum block, a T-type preheating aluminum block and a constant temperature aluminum block are arranged, the lower end of the T-type preheating aluminum block is connected with the thin-type heating aluminum block, the upper end of the T-type preheating aluminum block is connected with the constant temperature aluminum block, heat of the thin-type heating aluminum block is transmitted to the constant temperature aluminum block through the T-type preheating aluminum block, the thin-type heating aluminum block, the T-type preheating aluminum block and the constant temperature aluminum block are provided with feeding pipe insertion holes, one end of the feeding pipe is connected with the printing spraying head body fixedly arranged on the thin-type heating aluminum block through the feeding pipe insertion holes, and the other end of the feeding pipe is connected with the feeding machine. The heating pipe preheats the printing materials at the constant temperature, then the printing materials enter the printing spraying head body heated by the thin-type heating aluminum block for melt extrusion, the heating space is greatly reduced, melting is rapid, denaturation is avoided, excessive printing materials are avoided, the printing spraying head body can be prevented from being blocked, and the printing stability and precision are improved.

Description

Technical field [0001] The invention involves a 3D printer. Specifically, it is a anti -blocking print head of a melting deposition (FDM) 3D printer. Background technique [0002] 3D printer is a device for fast molding technology. It is a technology based on digital model files, with powder -shaped metal or plastic and other sticky materials to construct objects by layer -by -layer printing.It connects to the computer or enters the three -dimensional model of an object through the SD card (or USB), and stacks liquid or powder "printing materials" layer by printing by printing control settings.Turning into real things.It consists of control components, mechanical components, print heads, consumables and media. [0003] Fused Depositation Modeling (FDM) is one of the mainstream technologies of 3D printing.It uses the hot -melt and adhesive of thermoplastic material (ABS or PLA) to heat the thermoplastic material into a melting state in the print head.Under the setting of the progr...

AI Technical Summary

Problems solved by technology

[0004] There are two main technical deficiencies in the existing fused deposition (FDM) 3D printer print head: one is that it cannot adapt to long-term continuous printing. Thermoplastic materials such as PLA are usually heated to above 200°C and kept at this temperature for a long time It will lead to material denaturation, which will eventually cause nozzle blockage; second, the heating area of ​​the existing 3D printer is relatively large, so that more printing materials in the printing nozzle will be melted, and the newly entered unmelted material will squeeze and overflow the melted material in the nozzle. It overflows in the gap of the feed end and cools down to solidify, causing the print head to be clogged

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