A 3D printer hot bed system suitable for large and medium printing sizes and its working method

Abstract

The invention discloses a 3D printer heating bed system suitable for large and medium printing sizes and a working method thereof. In the assembly, the pulley assembly is placed at the outlet of the frame assembly; the frame assembly includes a lifting device, a bottomed hot bed guide plate and a 3D printer frame; the lifting device is connected to the 3D printer frame and can be moved up and down. Lifting movement, the heated bed assembly can be fixed on the lifting device; the heated bed assembly includes tempered glass plate, heated silicone plate, heated bed frame, heated bed front foot frame, pulley backing plate, fluent strip and position locking mechanism; tempered glass The board is placed on the heated bed frame; the heated bed assembly is connected with the lifting device through a position locking mechanism; the pulley assembly has a pulley frame, and the pulley backing plate is connected with the pulley frame when the heated bed assembly is moved out. The invention has the characteristics of simple structure, large forming area, convenient leveling, convenient pick-up, low production cost and the like.

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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