【3DEVO】Everything you need to know about 3D printer filament recycling
As we approach 2025, with technological advancements and plastic waste continuing to enter landfills and water bodies, a significant ecological challenge will emerge, potentially leading to the collapse of our planet.
Every year, thousands of marine animals die due to plastic entanglement, while millions of people face the risk of plastic ingestion.
The extensive use of plastic in 3D printing also exacerbates the plastic crisis. Improperly disposed 3D printing waste can lead to the accumulation of microplastics in the ocean, posing a threat to both ecology and human health.
This is a major concern, especially considering that the global 3D printing material market has only recently begun to grow.
This is why responsible 3D printing enthusiasts and manufacturers are turning to green 3D printing, which includes reducing, reusing, and recycling excess plastic produced during the printing process.It is estimated that this material takes 10 to 1,000 years or even longer to decompose.
If users want to properly dispose of this waste, they need to understand its properties and disposal methods.
In this article, we will explore some strategies for reducing, reusing, and recycling 3D printing waste.
Minimize 3D Printer Waste
The first step in addressing the plastic crisis is to minimize its use.
There are several ways to do this before you even start printing.
Reduce Supports
The first effective method is to eliminate the need for supports as much as possible when designing your model.
Designs with overhangs require supports because the printer needs material beneath the overhang to add new layers.
To address this, you can design models that use more arches rather than 90-degree angles in the print.
Another option is to consider if a different orientation helps avoid or reduce supports.
Less support material means less plastic waste.
This may not apply to all prints, especially when they are for functional end-use.
However, it is still good practice to design with the ecological impact of your print or manufactured design in mind.
Reduce Bed Adhesion and Infill
Slicer settings are an important area where filament usage can be reduced.
If your model allows, a greener solution is to print with skirts instead of rafts.
Skirts, instead of forming an entire set of layers under the print object, form a single layer around the object, reducing material consumption.
Skirts provide a degree of bed adhesion, making them particularly suitable for problematic models that do not make sufficient contact with the print platform.
Depending on the equipment model, you can try increasing the number of lines or the skirt width, which will give you more contact area while maintaining a more sustainable printing method.
Sometimes, the ability to use skirts instead of rafts depends on a well-designed model and a well-calibrated printer. Of course, bed adhesives like glue also help.
Of course, reducing infill also reduces filament consumption and is a good option for saving money.
It is often impossible to eliminate it completely, but consider how low you can go. If you are modeling from scratch, consider making multi-part prints where higher infill is only used for parts that require strength.
Effective Part Splitting
The last thing to consider before printing is how many prints you place on the print platform at once.
As mentioned earlier, multi-part prints are a good practice. Splitting prints into smaller components can reduce wasted material if a print fails.
This method can save you a lot of time by avoiding a frustrating print failure after several hours of progress.
If the design is particularly large and monolithic, it can be split by adding tabs and corresponding holes to connect the parts.
Spreading components across multiple prints can save material, time, and money.
Reusing 3D Printed Waste Material with Recycled Filament
Printing with recycled filament is also a good way to reduce plastic consumption.
Today, consumers have a large selection of recycled filaments available, and they are also affordable.
Due to manufacturers' efforts to ensure the quality of raw materials, the quality of recycled filament can be the same as or better than regular filament.
In addition to PLA and ABS, recycled filament can also be found in various common and new materials.
Manufacturing Recycled Filament
Given the benefits of recycled filament, recycling waste print material is a very beneficial action.
This process has several steps, and if done on a large scale, it can even become a very economical business model.
As you can imagine, you need specialized equipment to recycle 3D printing waste.
When recycling waste filament, the process has two main parts: shredding and extrusion.
The first part prepares the plastic to be melted, and then in the second part, the shredded plastic is melted and reshaped.
For the melted filament to have a consistent thickness and viscosity, the input plastic must have the same material properties, and the size of the shredded pieces must be roughly the same.
During the extrusion process, the plastic passes through a hot end where it melts, then is pushed through a nozzle which determines the diameter of the filament, common filament diameters being 1.75 mm and 2.85 mm.
After the melted plastic solidifies, it must be spooled. The process of putting the filament on a spool is quite important as it affects the consistency of the filament diameter.
The winder must pull at a steady speed to avoid stretching the filament while it is still flexible.
A good equipment setup is a necessary preparation for entering the 3D printing recycling process, and a complete product ecosystem is particularly important.
Purchasing equipment is a significant investment, so it is best to eliminate guesswork for many parts, such as setup and fine-tuning processes.
Therefore, choosing a trusted brand of shredders and extruders from the same ecosystem is crucial.
This not only ensures that the equipment components are from the same ecosystem and standard but also that they have all been professionally tested and are ready for use.
At the same time, there is a wealth of official guides and user communities surrounding these products, providing more knowledge to help you get started.
As we just mentioned, producing recycled filament requires specialized equipment: a shredder, an extruder, and preferably a winder.
Good related products will help you smoothly start recycling old 3D printing waste and regenerating it into useful resources.
Plastic Shredder
Shredding is a very important part of the entire process.
Most importantly, the resulting particle size must remain consistent.
Purchasing a shredder can be expensive, but it can also be a beneficial expenditure that yields better results for your 3D printing waste recycling efforts.
At the same time, this is also a good investment for our shared future.
The 3Devo Plastic Shredder GP20 can recycle almost any shape and size of plastic into pellet-sized 3D printing material.
This dual design combines a smart plastic shredder with an integrated granulator, allowing you to focus on your needs.
The shredder's functionality gives you the freedom and flexibility to integrate it into any project in any industry.
Filament Maker
Next, you need a high-quality filament maker to achieve consistent diameter and shape.
And because it is the last step in filament recycling, you need to ensure that many equipment characteristics are excellent enough to deliver outstanding production quality.
The Filament Maker TWO has stable performance in this regard and is trustworthy.
Its design purpose is to provide consistent filament quality, making it a good choice for filament extruders, and it also includes spooling capabilities.
Its features include: high motor torque / optimized heating / improved compression ratio / more optimized L/D ratio.
It can mix various materials to create new filaments, achieving circular reuse, maximizing the use of your filament, and saving some costs, bringing new heights to filament manufacturing.
The Filament Maker TWO measures the filament from three sides, allowing sensors to detect any ovality, ensuring the filament maintains a consistent circular shape.
This leads to higher quality and more reliable print results.
Its thermal sensor accurately measures the temperature of the filament before it reaches the puller wheels. This allows for precise adjustments to prevent filament extrusion and ensure consistent filament quality.
Its related functions and features can be found in "Filament Maker Two Advances Custom 3D Printing Filament Production".
Using Plastic Waste Recycling Services
Finally, perhaps at this stage, we cannot invest more time and money, but we can still support green initiatives for 3D printing by using recycling services.
For example, entrusting waste plastic to people who can recycle it, allowing this waste to become part of green recycling.
Therefore, if making recycled filament yourself is beyond your willingness, try sorting, storing, and recycling your print waste!
► 3Devo Filament Maker ONE Series
► 3Devo Filament Maker TWO Series
► 3Devo Plastic Shredder GP20
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