3D printing plus hot air: how to bend flat mesh prints afterwards

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March 13, 2026 Applications 10679

Grid and mesh structures can be quickly adapted in 3D printing, for example using infill patterns or freely drawn geometries, but it becomes more difficult if the mesh is to be curved.

Curved mesh parts otherwise require support structures, long printing times or several attempts. YouTuber Uncle Jessy shows a pragmatic way: the mesh is created flat on the print bed and only then gets its shape through heat and a printed tool.

The core of the approach is a two-part mold that defines the subsequent geometry. This mold is first printed in-house and serves as a pressing tool. The actual mesh is produced separately, then placed in a frame and heated with a heat gun. As soon as the material becomes soft, it is pressed into the mold and shaped there. Uncle Jessy emphasizes that low temperature and slow heating are more important than fast heat. The aim is stretching and forming, not melting.

In thermoforming, the heat resistance of the mold often plays a major role. Here, the requirement is lower because a mesh only has a low thermal mass. Uncle Jessy describes that a sufficiently dense mold is sufficient and that the mold does not necessarily have to be made from a particularly heat-resistant material.

In the video, he also shows typical errors. In a first attempt, the part shrank during heating and no longer fit neatly into the mold. He then heats the mesh directly in the mold frame. It also turned out that if the heat is too aggressive, the edges give way first and can tear. With more distance from the nozzle of the heat gun and continuous movement, the shaping was more even.