heart candy mold 3d model

Create a flat, single-piece 3D-printable candy mold plate designed exclusively for PLA filament. The model is NOT a box or container, only a solid flat plate with recessed cavities. Overall plate dimensions are 160 × 160 × 10 mm, suitable for the Bambu Lab A1 Mini (180 × 180 × 180 mm). The top surface contains 20 identical heart-shaped candy cavities arranged in a clean 5 × 4 grid. Each heart cavity is 20 mm wide, 18 mm high, and 6 mm deep, with smooth continuous curves and no sharp internal corners. Base thickness is 3 mm, cavity wall thickness is 2.5 mm. All edges and transitions are filleted with a 1.5 mm radius for easy candy release. The bottom surface is completely flat. No text, no logos, no lid, no assembly. Design must be manifold, watertight, support-free, with overhangs under 45°, optimized for clean PLA printing only.