Filament Holder – Spool Container

Modular Filament Dry Container

Modular 1 kg spool container designed for controlled humidity storage

The system is entirely 3D printable and requires no screws, glue, or hinges
All components are interlocking

🔧 Main Features

• Compatible with standard 1 kg filament spools
• Printable on 220 × 220 mm build plates
• Usable with or without vacuum bags
• Interlocking bottom separator with the base creates a dedicated compartment for silica gel
• Optional central container to increase absorption capacity
• Upper seat for TPU O-ring (non-vacuum mode)
• Mechanical opening system via key
• Front label slot 76 × 52 × 1.2 mm

🧩 Print Compatibility

All components are designed to be printed on 220 × 220 mm build plates

🧩 Modular Structure

Base + Bottom Separator

The bottom separator interlocks directly with the base and creates the dedicated compartment for silica gel

This keeps the silica separate from the filament spool, ensuring air circulation and easy removal for maintenance

Optional Central Container

Usable in non-vacuum mode to increase the amount of silica and improve internal humidity stability

It can be installed or removed based on the desired configuration

🧩 Usage Modes

1️⃣ With vacuum bag

The silica in the bottom compartment acts as additional protection in case of micro-leaks or frequent opening

2️⃣ Without vacuum

By using the TPU O-ring and silica system, the box functions as a humidity-controlled container, significantly reducing exchange with the external environment

3️⃣ Advanced Configuration

It is possible to use both the bottom compartment and the central container to maximize absorption capacity

🔒 Locking System

Base and lid mate via mechanical pressure fitting

During closing, it is necessary to apply pressure until the classic “clack” of plastic locking systems is heard

The auditory and tactile feedback confirms that:

• the interlocking is fully engaged
• the compression is correct
• the O-ring (if installed) is in place

If the “clack” is not heard, the container might not be completely closed

The key is used solely as a lever to facilitate opening, avoiding forcing the walls

🏷 Labeling

The front slot accepts 76 × 52 × 1.2 mm labels, ideal for indicating:

• Material type
• Brand
• Color
• Other

🧠 Design Philosophy

The project was developed with FDM logic from the modeling phase

Geometries, interlocking parts, and tolerances were designed to:

• ensure assembly without external components
• maintain mechanical stability over time
• simplify printing and maintenance

The entire system functions exclusively through geometric interaction between the printed parts

⚠️ Slicing Note – Plate n°3

A warning regarding missing supports may appear on plate n°3

The warning is due to an overhanging wall not recognized as a bridge by the slicer, but the component is designed to be printed correctly without supports

⚠️ Technical Note – Seal

The container is designed to significantly reduce humidity exchange, but it is not a certified airtight or vacuum container

As with any FDM printed object, a minimal permeability of the material and layer lines may be present in the long term