Multi-Part Banded Tumbler Mold with Alignment Keys (STL, OBJ, STEP)

Produce flawless, professional-grade cups, small planters, or desk organizers with this highly precise 4-Part Casting Mold system. Designed specifically for product design manufacturing and DIY casting, this mold features a classic cylindrical silhouette accented with elegant double-banded ribbing at the top and bottom.

The engineering of this tool ensures a seamless casting experience. It utilizes a four-part interlocking design (base, two side shells, and a central core) equipped with spherical registration keys. This guarantees that the mold locks together with absolute perfect alignment every single time, preventing leaks and minimizing seam lines on your final product.

Key Features:

Elegant Banded Design: Casts a modern cup with raised double-ring details, perfect for contemporary homeware collections.

Spherical Registration Keys: Built-in male/female alignment nodes ensure the four separate pieces snap together tightly and accurately.

Easy Demolding: The multi-part split shell design allows for effortless extraction of rigid casting materials without damaging the final piece.

NURBS Precision: The included STEP file maintains perfect solid geometry, ready to be seamlessly modified or scaled in Plasticity, Rhino 8, or Fusion 360.

Render Ready: The OBJ format is optimized for setting up photorealistic promotional mockups in Blender or Cinema 4D.

Included File Formats:

STL: High-resolution meshes, ready to slice and 3D print immediately.

OBJ: Standard 3D mesh format, ideal for digital visualization and rendering.

STEP / STP: Universal solid CAD file, perfect for CAM toolpath generation or parametric editing.

For FDM / Resin 3D Printing:

Print Orientation:

    Base Plate: Print flat on its bottom face.

    Side Shells: Print resting completely flat on their solid outer back faces. This orientation guarantees the internal cavity prints with maximum smoothness and removes the need for supports on the registration keys.

    Core Block: Print flat on its top surface (upside down) for optimal stability.

Supports: No supports are required if all parts are oriented flat against the build plate on their largest outer planes.

Layer Height: 0.12mm to 0.16mm is highly recommended. A finer layer height beautifully captures the sweeping curves of the ribbed bands and minimizes layer lines, drastically reducing post-sanding work and allowing your casts to release easily.

Infill: 25% - 40% (Cubic, Grid, or Gyroid pattern). A sturdy, dense infill is necessary to prevent the mold walls from bowing or flexing under tight clamping pressure and the hydrostatic weight of the casting material.

Walls/Perimeters: Use at least 4 to 5 walls to ensure the mold is completely watertight, durable, and structurally rigid.

Assembly & Casting Tip: Assemble the side shells onto the base plate, insert the core, and secure the entire assembly tightly using heavy-duty rubber bands, trigger clamps, or a custom 3D printed clamp ring. Always apply a generous coat of a suitable mold release agent (like silicone spray, paste wax, or petroleum jelly) to the inner walls and alignment spheres before pouring concrete, jesmonite, or epoxy resin.