Bambu Lab’s 3D printing patent application for a new heatbed design may improve peeling issues

Bambu Lab, the parent company of Shenzhen Tuozhu Technology, recently filed a patent application in the United States for a new heatbed design. The aim of this design is to improve the even heating of the printbed, which in turn could reduce peeling issues commonly reported by users of various 3D printer brands (Source: <source 110f2c3b-8c7>). The patent, US20260264331A1, describes the design, heating method, and claims that the improved adhesion to the printbed will enhance print quality.

The patent features a heated bed body, a heating unit, and a bottom case. The heating unit is electrically connected to the power supply and positioned between the heated bed body and the bottom case. It is attached to a surface near the bottom case of the heated bed body, where it heats the heated bed body. This new design aims to improve the adhesion capability of the print panel and the overall print quality (Source: <source 110f2c3b-8c7>).

Current heatbeds use a laminated heating sheet adhered to an aluminum sheet with magnets holding the build plate in place. Bambu Lab's new design seeks to replace this with a single, monolithic heatbed featuring a machined channel for the heating element. The heating element is a long unit connected to a single power supply at both ends, with loops extending to the corners of the heatbed.

This configuration may reduce peeling for large prints, as the heating element covers most of the bed's surface (Source: <source 110f2c3b-8c7>). However, it does not describe independent heating zones.

Machining a recess in a large piece of aluminum is expensive in terms of both materials and machining costs. However, Bambu Lab might create the heatbed body from multiple pieces or layers of aluminum to avoid using large and expensive billets (Source: <source 110f2c3b-8c7>). The patent also includes claims for a generic CoreXY 3D printer, but this does not mean that all brands will infringe on the patent.

The claims tied to the heatbed design would only apply to printers featuring Bambu Lab's patented heatbed. The patent application is still pending, so it cannot be enforced yet (Source: <source 110f2c3b-8c7>).

If the patent is granted and the design proves superior to the current heatbed design, Bambu Lab might justify charging more for their replacement heatbeds and potentially the printers as well. However, there is currently no information on the performance of this design, so it remains to be seen if it will indeed improve print quality and reduce peeling issues (Source: <source 110f2c3b-8c7>).