Heating bottom plate of 3D printer

Abstract

The invention provides a multifunctional heating plate used at the bottom of a 3D printer. The heating plate comprises a metal support plate, an insulating plate, a metal ceramic heating plate, a high-temperature resisting heat conducting film and a high-temperature glass plate. According to the heating bottom plate of the 3D printer, the metal ceramic heating plate serves as a heating material, edge warping of a printed object can be effectively prevented, the printing quality is improved, and damage of the heating bottom plate when the 3D printer breaks down can be effectively avoided. A temperature sensor can accurately feed back the actual temperature of the heating bottom plate of the 3D printer to a control circuit of the 3D printer in time. Due to the insulating plate, heat losses can be effectively reduced, and the temperature of the heating bottom plate is more stable and uniform. Due to the high-temperature resisting heat conducting film, heat on the metal ceramic plate can be transmitted to the high-temperature glass plate more effectively and evenly. The adhesion force of the high-temperature glass plate to plastic materials is high, the trouble of replacing high-temperature double-sided adhesive tape is saved, and the printed object can be easily separated from the 3D printer.

Description

technical field [0001] The invention relates to a heating base plate, in particular to a heating base plate of a 3D printer. Background technique [0002] A 3D printer is an instrument that uses bondable materials such as powdered metal or plastic to construct a three-dimensional object by layer-by-layer printing. Among them, the most commonly used 3D printer is a fused deposition 3D printer that prints engineering plastics. The most common printing materials are acrylonitrile-styrene-butadiene copolymer (ABS) and polylactic acid (PLA). Due to the large thermoplastic cold shrinkage coefficients of these two raw materials, the printed objects are easy to warp, so a heated base plate is used as the forming platform of the object in the 3D printer to avoid warping of the object as much as possible. The heated base plate of the 3D printer It needs to have good thermal conductivity and heat resistance, smooth and flat surface, uniform heating temperature, fast heat conduction sp...

AI Technical Summary

Problems solved by technology

Due to the large thermal shrinkage coefficient of these two raw materials, the printed object is easy to warp, so a heated base plate is used as the forming platform of the object in the 3D printer to avoid the warping of the object as much as possible. The heated base plate of the 3D printer It needs to have good thermal conductivity and heat resistance, smooth and flat surface, uniform heating temperature, fast heat conduction speed and long service life. At present, the more commonly used heating bases on the market are aluminum alloy heating bases and silica gel heating. Although the bottom plate and the aluminum alloy heating plate have good thermal conductivity and heat resistance, and a smooth and flat surface, due to the uneven heating of its own structure, the object is unevenly heated during the printing process, which is prone to warping. Seriously affect the quality of printing. The silicone heating base plate is composed of nickel-chromium alloy heating wire and silicone insulating cloth. Although it has uniform heating temperature and good thermal conductivity, the nickel-chromium alloy heating wire is not covered with the entire silicone insulating cloth. , and the heating wire has a certain thickness, which will cause the surface of the silicone heating base plate to be uneven, and the place with the heating wire will be raised, and the place without the heating wire will be sunken; and if the silicone heating plate is to work for a long time, it is allowed The maximum working temperature is about 135°C. Although it can meet the 110°C working temperature requirement of the heating base plate of the 3D printer, the maximum allowable working temperature is very low. As long as the temperature is slightly higher, it may exceed 135°C. If it is not found in time, the silicone heating plate may be damaged, and a new silicone heating plate needs to be replaced, which will not only bring troubles in dismantling and installing the silicone heating plate , and will increase the cost of the 3D printer

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