How to Turn 3D Printing Waste into New Filament?
3 min
Turning 3D printing waste into new filament is a fantastic way to reduce plastic waste and save money. This process, known as filament recycling, involves collecting, processing, and extruding waste material into usable filament. Here's a step-by-step guide to help you get started:
Step 1: Collect and Sort Your Waste
● Types of Waste: Collect failed prints, support structures, and scraps. Ensure they
are clean and free of debris.
● Material Sorting: Separate waste by material type (e.g., PLA, ABS, PETG). Mixing
materials can result in poor-quality filament.
● Remove Contaminants: Clean off any adhesives, paint, or dirt from the waste.
Step 2: Shred the Waste into Small Pieces
● Shredding Machine: Use a plastic shredder or granulator to break down the waste
into small, uniform pieces (pellets or flakes).
● DIY Option: If you don’t have a shredder, you can manually cut the waste into small
pieces using heavy-duty scissors or a cutting tool.
Step 3: Dry the Shredded Material
● Why Dry? Moisture can degrade the quality of the filament during extrusion.
● How to Dry: Use a food dehydrator, oven, or filament dryer to dry the shredded
material at the appropriate temperature for the plastic type (e.g., 45–60°C for PLA).
Step 4: Extrude the Material into Filament
● Filament Extruder: Use a filament extruder machine (like the Filastruder or Felfil
Evo) to melt and extrude the shredded plastic into filament.
● Extrusion Process:
1. Load the dried plastic pellets into the extruder hopper.
2. Heat the extruder to the melting temperature of the material (e.g., 160–180°C
for PLA, 230–250°C for ABS).
3. Extrude the melted plastic through a nozzle to form a consistent filament
strand.
● Diameter Control: Use a filament winder or spooler to ensure the filament has a
consistent diameter (typically 1.75mm or 2.85mm).
Step 5: Spool and Store the Filament
● Spooling: Wind the extruded filament onto a spool using a manual or automated
winder.
● Storage: Store the recycled filament in a dry, airtight container with desiccant to
prevent moisture absorption.
Tools and Equipment Needed
1. Plastic Shredder/Granulator: To break down waste into small pieces.
2. Filament Extruder: To melt and extrude the plastic into filament.
3. Filament Winder: To spool the extruded filament.
4. Drying Equipment: Food dehydrator, oven, or filament dryer.
5. Calipers: To measure and ensure consistent filament diameter.
Challenges and Tips
● Material Degradation: Repeated recycling can weaken the plastic. Mix in some
virgin material to maintain strength.
● Consistency: Achieving a consistent filament diameter can be tricky. Practice and
calibration are key.
● Safety: Wear protective gear (gloves, mask, and goggles) when handling hot plastic
and machinery.
DIY vs. Commercial Solutions
● DIY: If you’re on a budget, you can build your own shredder and extruder using
open-source plans and kits.
● Commercial: For convenience, invest in a complete recycling system like the
ProtoCycler or Filabot.
Benefits of Recycling 3D Printing Waste
● Eco-Friendly: Reduces plastic waste and environmental impact.
● Cost-Effective: Saves money by reusing material.
● Custom Filament: Create unique colors and blends by mixing different waste
materials.
By recycling your 3D printing waste, you can contribute to a more sustainable 3D printing ecosystem. Let me know if you need help finding specific tools or resources!
Keep Learning
Top 5 Heat-Resistant 3D Printing Filaments Compared
When Regular Filament Just Doesn’t Cut It You’ve 3D printed a functional bracket for a car engine bay. It fits perfectly, looks great, and then warps into a banana-shape after a week under the hood. That’s the danger of underestimating heat. If you're building automotive components, enclosures near motors, molds, or even kitchenware, using the wrong filament can lead to deformation, brittleness, or outright failure when exposed to heat. So, you already know the solution: Choosing the right heat-resist......
Flexible 3D Printing Filament Types: TPU, TPE & Soft PLA Guide
You’re probably here because rigid PLA just won’t cut it. Maybe your print needs to flex, bounce back, stretch, or just not snap in half under pressure. Whether it’s a phone case, a gasket, a soft robot joint, or some weird wearable idea, you’re now in the world of flexible 3D printing filaments. But here’s the problem: Flexible filaments like TPU, TPE, or soft PLA aren’t all the same. Some are rubbery and forgiving, others are more like bendy plastic. Some will glide through your printer like a dream......
What Is LW PLA? How Lightweight PLA Works and When to Use It
The first time you print with LW PLA, you will genuinely think that you grabbed the wrong spool off the shelf. Pick the part up off the bed and it will feel hollow. But it isn't. Same infill setting, same model, just... lighter. Sometimes, depending on print temperature and expansion ratio, it can reduce part weight by approximately 20–50%. So what's actually going on? This guide walks through what LW PLA is, why it does what it does, and the settings that'll get you there without fighting the printer......
Is MJF Suitable for Production Parts? A Practical Engineer’s Guide
Why Engineers Choose MJF for Production Parts MJF didn’t rise just as a prototyping machine. It climbed straight into real manufacturing. The making of HP Multi Jet Fusion 3D printed parts uses a fine-grained nylon powder fused with a chemical fusing agent and precision infrared heating. That means consistent, repeatable parts without visible stepping or layered fragility. Dimensional accuracy typically sits around ±0.2 mm for small features, depending on geometry, orientation, and part size, tight en......
Choosing the Right ESD Filament for Your Application
Introduction Somewhere in an electronics assembly facility right now, someone is printing a fixture on a desktop 3D printer using standard PLA. It looks fine. It fits the board. And every time a PCB gets placed in it, static charge builds on that perfectly smooth, perfectly insulating plastic surface, right next to components sensitive to discharges that humans can't even feel. ESD filament exists specifically for this problem. It's not a premium upgrade to standard filament. It's a different material......
ABS-ESD Plastic: Properties, Applications & Selection Guide
Introduction ABS-ESD is a specialized engineering ABS plastic developed for static-sensitive environments. Most engineers encounter ABS-ESD for the first time when a PCB fixture fails an ESD audit or a customer rejects a housing because it's not made from ESD safe ABS. The part was dimensionally correct. The material was wrong. ABS-ESD plastic solves a specific problem, static charge accumulating on parts that contact or sit near electronics. It does that job well, it 3D prints reliably, and it costs ......