3D printer hot bed system adapting to large and medium sizes and working method thereof

Abstract

The invention discloses a 3D printer hot bed system adapting to large and medium sizes and a working method thereof. The hot bed system comprises a rack assembly, a hot bed assembly and a pulley assembly. The hot bed assembly is connected into the rack assembly. The pulley assembly is arranged at a piece discharging opening of the rack assembly. The rack assembly comprises a lifting device, a grounding hot bed guide plate and a 3D printer rack. The lifting device is connected to the 3D printer rack and can do up and down lifting motion. The hot bed assembly can be fixed to the lifting device. The hot bed assembly comprises armor plate glass, a heating silica gel plate, a hot bed skeleton, a hot bed front supporting foot skeleton, a pulley back plate, a smooth bar and a position locking mechanism. The armor plate glass is arranged on the hot bed skeleton. The position locking mechanism connects the hot bed assembly with the lifting device. The pulley assembly is provided with a pulley skeleton. The pulley back plate is connected with the pulley skeleton when the hot bed assembly is moved out. The 3D printer hot bed system has the beneficial effect that the structure is simple, the forming area is large, leveling is convenient, pieces are convenient to take, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to a heating bed system of a 3D printer, in particular to a heating bed system of a 3D printer suitable for large and medium printing sizes and a working method thereof. Background technique [0002] At present, the printing area of ​​the hot bed system of 3D printers is generally less than 300mm*300mm. In the form of fused deposition process, when the 3D printing area is larger than 1m 2 , the following problems arise: [0003] 1. Flatness problem: 3D printing requires that the gap between any position of the hot bed and the print head of the working part does not exceed 0.1-0.2mm, otherwise the printing operation cannot be performed normally (the gap is too large, the material cannot be attached to the substrate, the gap is too small or the negative The gap will cause the nozzle to be scratched and damaged). In large and medium size (such as 1m 2 to 3m 2 Within the printing range), it is very difficult to ensure the distance...

AI Technical Summary

Problems solved by technology

[0003] 1. Flatness problem: 3D printing requires that the gap between any position of the hot bed and the print head of the working part does not exceed 0.1-0.2mm, otherwise the printing operation cannot be performed normally (the gap is too large, the material cannot be attached to the substrate, the gap is too small or the negative The gap will cause the nozzle to be scratched and damaged)

Even if the base plate has sufficient strength and does not deform after heating, it needs to be milled and ground by precision casting, which is extremely expensive

In actual conditions, in order to control the thermal deformation of large-scale cast flat plates, the thickness needs to be 30-50mm, and the thickness is 1.6m 2 The weight of the flat panel can reach 800kg, and the structural design of the whole machine needs to be adjusted fundamentally, which is not conducive to the cost control of the whole machine

[0004] 2. Heating problem: 3D printing operation requires that the heating bed on the working floor can maintain a constant temperature of 30-40 degrees Celsius, and the temperature rises and falls rapidly, which is conducive to precise temperature control

If the area of ​​the heated bed is increased while satisfying the flatness, the heating power will increase, the temperature rise and fall speed will decrease, and the cost of use and maintenance will increase;

[0005] 3. Pick-up problem: After the existing 3D printer is printed, it picks up the printed parts on the machine, but it is inconvenient to pick up large-sized printed parts due to the interference of the rack space

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