Pumpkin Mold – Multi-Purpose (Cake/Wax/Plaster)

3D-printed mold designed to create a silicone master for pumpkins. Suitable for multiple uses: resin, soap, wax, plaster, and more. Optimized for fast FDM printing without supports, with clean demolding and easy assembly.

What’s Included

• /3mf/Pumpkin_mold_cg_notorious.3mf (Bambu Studio profile)
• /stl/01_pumpkin.stl
• /stl/02_base.stl
• /stl/03_pumpkin_shell.stl
• /stl/04_insert_lock.stl
• /stl/05_lock.stl
• pumpkin_mold_assembly (assembly reference file)

Specs & Scale

• Native size pumpkin: 63 mm tall × ~94 mm Ø
• Scalable ±10% without affecting function

Recommended Print Settings (FDM)

• Material: PLA (recommended) or PETG
• Nozzle: 0.4 mm
• Wall count: depends on your preference; my test print uses thicker walls for reusability
• Layer height: 0.12 mm for the pumpkin (higher detail for smooth surface) for the rest of the pieces you can use 0.16mm or 0.20 mm.
  Supports: Off

Assembly

1. Insert the lock inside the pumpkin and rotate 90°.
2. Place the base under the pumpkin; rotate to align with the negative space.
3. Fit the last piece under the base to keep the pumpkin straight and prevent leaks.
4. Ensure the shell is aligned correctly: the clip angle must match the pumpkin’s top “cut” (see top render).
5. Secure the shell to the base using clamps.

6. check the video here: 

Casting Notes

• When pouring silicone, pour slowly in short pauses to reduce bubbles.
• The mold shape avoids air traps, but pouring too fast can cause bubbles.
• Food contact: Do not pour food directly into FDM prints. Always use this as a master to make a food-safe silicone mold.
• Some silicones may require a release solution to aid demolding. Check the specifications of the silicone you are using.
• Note: most food-grade silicone is not oven-safe unless specified.

Post-Processing 3D PRINT 

• Lightly sand the inner surface (P400–P800) for smoother casts.
• Clean thoroughly with isopropyl alcohol after the sanding.

Post-Processing THE SILICONE MOLD   

• For the silicone master (if food-grade)
   First Cleaning of a New Silicone Food Mold (Post-Casting)
   
  1. Rinse Immediately
     Wash under warm running water to remove surface dust and loose particles.
  2. Degrease
     Fill a basin with warm water + mild, food-safe dish soap.
     Gently wash with a soft sponge to remove release agents or residues.
  3. Neutralize & Deodorize
     Rinse with a solution of warm water + 1–2 tablespoons of white vinegar per liter.
     Helps remove chemical smell and leftover oils.
  4. Optional Deep Clean (if oily film remains)
     Sprinkle baking soda onto the mold, rub gently with a damp sponge, and rinse well.

FAQ

• Food-safe? No—this print is a master for silicone molds.
• Best filament? PLA for ease, PETG for durability.
• Can I sculpt a face? Yes—edit the digital model to add a pumpkin face. Just avoid making cuts too deep, so the silicone remains thin and easy to demold.

If you have any questions, feel free to ask in the comments — I’ll do my best to help or share my opinion.