Space constant-temperature large-size printing platform 3D printing device

Abstract

The invention discloses a space constant-temperature large-size printing platform 3D printing device. The space constant-temperature large-size printing platform 3D printing device comprises a devicerack, a heat preservation layer is arranged on the inner side of the rack, a front door is arranged on the front face of the rack, a forming space is formed by the heat preservation layer and a cavitydefined by the interior of the front door, a printing platform assembly, a spray head assembly and a hot air double-circulation space heating assembly are arranged in the forming space, the printingplatform assembly is arranged at the bottom in the forming space, an air inlet of the hot air double-circulation space heating assembly is formed in the top of the forming space, and an air outlet ofthe hot air double-circulation space heating assembly is formed under the printing platform assembly; and a hot bed of the printing platform assembly is formed by splicing a plurality of hot bed units, and each hot bed unit is provided with a horizontal adjusting assembly and a locking assembly. According to the space constant-temperature large-size printing platform 3D printing device, stress deformation of a large-size hot bed during heating can be effectively avoided, hot air blown out of the forming space is diffused all around, the whole forming space is evenly filled with the hot air, and the forming precision and the surface quality of products are effectively improved.

Description

technical field [0001] The invention relates to the technical field of rapid prototyping equipment, in particular to a large-size printing platform 3D printing device with constant space temperature. Background technique [0002] The 3D printer based on the fused accumulation rapid prototyping process uses plastic filaments with a diameter of about 1-2 mm, and melts and extrudes the plastic filaments into filaments of about 0.2-0.4 mm through a computer-controlled printing extrusion head and scans them layer by layer. Print stacks into three-dimensional objects. The forming space of the 3D printer is the printing space of the 3D printer. Now 3D printing technology is developing towards high-precision and large-size printers. The very important decisive factor is the technical difficulty that must be solved in the development of high-precision and large-size printers. [0003] The horizontal adjustment accuracy of the printing platform of the 3D printer and the temperature ...

AI Technical Summary

Problems solved by technology

The first heating method can make the surface of the printing platform reach the preset temperature and keep the printing platform at a constant temperature by heating the printing platform, and the heat radiation of the printing platform can heat the forming space. The temperature is uniform and constant. As the number of model printing layers increases, the farther the model printing surface is from the surface of the printing platform, the greater the temperature difference with the surface of the printing platform will cause the internal stress of the printed model to increase and cause warping of the part Or cracking in the middle, resulting in printing failure

The second solution is to heat the entire molding space. The hot air of the heating system is uneven. Especially during the printing process, the initial layer on the printing platform will be overheated due to the uneven temperature of the space, resulting in softening, deformation, cracking, etc., which will affect the model. Printing accuracy, even cause printing failure

Images