Melt differential three-dimensional printer

Abstract

The invention discloses a melt differential three-dimensional printer. The melt differential three-dimensional printer mainly comprises a material melting unit, a micro-droplet jetting unit, a cylindrical-coordinate system molding unit and a rack, wherein a servo motor drives a screw rod to rotate in the material melting unit; a heater, which is fixedly arranged inside a machine cylinder, ensures that granules are entirely plastified through temperature regulation; a molten material is transmitted by the screw rod to the micro-droplet jetting unit; in the micro-droplet jetting unit, the molten material is transmitted into a valve body through a hot runner in a runner plate; a linear servo motor drives a valve needle to do reciprocating motion in the valve body so as to quantitatively and intermittently squeeze the molten material out of a nozzle to form melt micro-droplets; in the cylindrical-coordinate system molding unit, the molten micro-droplets are injected to a bearing table for cooling and deposition molding; the servo motors in the left-right direction and in the vertical direction are respectively engaged with the corresponding screw rod to rotate so as to drive the material melting unit and the micro-droplet jetting unit to move along the left-right direction and the vertical direction; a circumference servo motor drives the bearing table with a worm gear to rotate through a worm rod so as to realize three-dimensional movement under a cylindrical-coordinate system.

Description

technical field [0001] The invention relates to the technical field of three-dimensional printing, in particular to a three-dimensional molding equipment and method capable of injection molding plastics. Background technique [0002] At present, 3D printing technology has a variety of molding processes, among which fused deposition molding is the most common one. The consumables are heated to melt and extrude them, and accumulate and solidify at designated positions to form products. Commonly used consumables include ABS, PLA, etc. Before printing consumables, they need to be processed into filaments with a specific diameter, and then undergo dust removal and drying treatment, which requires high requirements; in addition, filaments often slip and tangle, which is easy Insufficient feeding of the melting section leads to defects in the product; in addition, most 3D printers using fused deposition modeling technology on the market only set parameters according to a specific c...

AI Technical Summary

Problems solved by technology

[0004] Ordinary small plunger injection molding machines have disadvantages such as low plasticization efficiency and uneven plasticization, and are not suitable for high-frequency melt injection movements. They need to be improved before they can be used for 3D printing; in addition, current 3D printers mostly use right-angle As the motion mechanism of the forming platform, the coordinate machine mechanism has disadvantages such as contour distortion and low forming precision when processing circular thin-walled parts. Therefore, the 3D printer using the cylindrical coordinate system and the offset filling method of the contour trajectory has become a research hotspot.

Images