Bib drying rack (3 arches)

A three-arch silicone bib drying rack with a watertight drip tray and support-free 3D-printable frame in PETG. The structure features three inverted-U arches spaced 60–90 mm apart (adjustable pitch), each ~170 mm wide, joined to straight legs via dowel pins at a configurable height. The tray is 230×245 mm with 15 mm walls, the arches have rounded corners, and all joints use square sockets and slip-fit dowels to prevent twisting. Frame width, overall height, arch radius, joint height, and dowel diameter are all parametric for fitting bibs of different sizes.