3D printer

Abstract

The invention provides a 3D printer. The 3D printer comprises a frame, a hot bed assembly, a moving assembly and a spray head assembly. The hot bed assembly is arranged in the frame. The moving assembly is fixedly connected into the frame. The spray head assembly is connected to the moving assembly in a sliding manner. According to the 3D printer, air duct design is adopted, and the temperature ofconsumable items extruded out of the spray head assembly can be effectively and precisely controlled; meanwhile, a sound insulation structure is added into each air duct, the noise is effectively reduced, and the better sound insulation and suppression effect is achieved; in addition, a balancing mechanism is matched with a negative pressure cavity for use, a structure with obliquity can be completed more conveniently, and the structure with the obliquity can look more natural; and thus, the printing time is shortened.

Description

technical field [0001] The present invention relates to the field of 3D printing equipment, in particular to a 3D printer. Background technique [0002] At present, 3D printers are developing rapidly, and the most common one is still hot-melt 3D printers. The basic printing principle is to print the cross-sections of each layer of the model layer by layer on the hot bed from bottom to top; Print a base surface on the heat bed, which is usually shaped like figure 1 Consists of reciprocating lines as shown; once the base face is complete, the model solid can be printed over the base face. In the printing process of 3D printers, in order to ensure sufficient adhesion between the base surface and the hot bed and avoid model movement, the hot bed always maintains a relatively high temperature, generally around 110°C; however, in actual printing During the process, since the heat dissipation of the outer contour of the bottom of the model is obviously better than that of the int...

AI Technical Summary

Problems solved by technology

In the printing process of 3D printers, in order to ensure sufficient adhesion between the base surface and the hot bed and avoid model movement, the hot bed always maintains a relatively high temperature, generally around 110°C; however, in actual printing During the process, since the heat dissipation of the outer contour of the bottom of the model is obviously better than that of the interior, the outer contour of the bottom of the model is easy to dry; when the printer nozzle continuously applies shear force and pressure to the upper edge of the model, it is easy to make it different from the nozzle. The bottom of the model on the side is warped upwards, which forms the bottom curling effect, and finally causes the model to be dragged horizontally, so that the printing cannot continue; the current solution to this problem is to stick adhesive tape on the surface of the hot bed to strengthen the base surface Friction with the heated bed, which is obviously time-consuming and troublesome

Images