Alexei Volkov
3D printing is a complex process that involves heating plastics to high temperatures. As the plastic cools, it shrinks, reducing the overall dimensions of the print. This shrinkage occurs to some degree with almost all 3D printing filaments and resins. The amount of shrinkage depends on several factors, including the printing temperature, cooling rate, and additives in the filament. For example, the average shrinkage rate of PLA is between 0.3% and 2.5%, but it can range from 0.8% to 3%. In comparison, a high-temperature filament like ABS can shrink by up to 8%. This variation in shrinkage rates highlights the importance of accounting for specific material properties when preparing 3D models for printing.
| Characteristics | Values |
|---|---|
| Average shrinkage rate of PLA | 2% |
| Range of shrinkage rate of PLA | 0.8% to 3% |
| Shrinkage rate of ABS | Up to 8% |
| Shrinkage rate of Nylon | Up to 0.7-0.8% |
| Shrinkage rate of Nylon 12 | Up to 2% |
| Shrinkage rate of PVDF | Up to 4% |
| Shrinkage rate of PETG | 0.8% |
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What You'll Learn
The average shrinkage rate of PLA is 2%
The shrinkage of 3D-printed materials occurs due to the contraction of the material as it cools after being extruded and formed. This is because plastics expand when heated to high temperatures during printing and then shrink as they cool down, reducing the overall dimensions of the print.
Accounting for the specific shrinkage rate of the material is crucial to obtaining accurately sized prints that match the digital designs. For example, to compensate for shrinkage in PETG filaments, which have a shrinkage rate of 0.8%, the model can be scaled up by the same factor before printing.
While shrinkage can be reduced through various methods, it cannot be entirely eliminated. Therefore, it is essential to consider the potential shrinkage when preparing the model for printing to ensure the final print aligns with the desired specifications.
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The shrinkage rate of PETG is 0.8%
To put this into context, the average shrinkage rate of PLA is 2%, but this can range from 0.3% to 3%. Nylon has a shrinkage rate of 0.7-0.8%, while PVDF can shrink by up to 4%. High-temperature filaments like ABS can shrink by up to 8%.
Shrinkage occurs because plastics expand when heated to high temperatures during printing, and then contract as they cool. The amount of shrinkage depends on factors such as printing temperature, cooling rate, and additives in the filament. It is important to account for the specific shrinkage rate of your material to get accurately sized prints.
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The shrinkage rate of ABS is up to 8%
ABS is a high-temperature filament, and its high shrinkage rate is one of the reasons why it is prone to warping. The thermal stress caused by shrinkage can lead to significant distortion of the geometry of the final print.
To reduce the amount of shrinkage in a print, the model can be scaled up by a factor equal to the shrinkage rate before printing. For example, if a print is expected to shrink by 2%, the model should be scaled up by 2% before printing.
However, it is important to note that shrinkage cannot be completely eliminated, and it occurs to some degree with almost all 3D printing filaments and resins.
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The shrinkage rate of nylon 12 is up to 2%
The shrinkage rate of 3D printing materials can vary depending on factors such as the printing temperature, cooling rate, and additives in the filament. For example, the shrinkage rate of PLA can range from 0.8% to 3%, while a high-temperature filament like ABS can shrink by up to 8%.
It is important to account for the specific shrinkage rate of the material being used to get accurately sized prints that match the digital designs. This can be done by scaling up the model before printing to compensate for the expected shrinkage. However, it is important to note that shrinkage cannot be completely eliminated, and thermal stress caused by shrinkage can cause significant distortion of the final print.
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The shrinkage rate of PVDF is up to 4%
3D print shrinkage refers to the contraction of a 3D-printed material as it cools after being extruded and formed. This shrinkage occurs because plastics and other materials expand slightly when heated to high temperatures during printing. As the material rapidly cools, it starts to shrink back down, reducing the overall dimensions of the print.
It is important to account for the specific shrinkage rate of the material being used to get accurately sized prints that match the digital designs. This may involve scaling up the model by a factor equal to the shrinkage rate before printing. However, it is important to note that shrinkage cannot be entirely eliminated, and thermal stress caused by shrinkage can lead to significant distortion of the geometry of the final print.
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Frequently asked questions
The shrinkage rate depends on the type of plastic used. For example, PLA has a shrinkage rate of 0.3% to 2.5%, while nylon 12 can shrink by up to 2%.
The shrinkage rate can be affected by the printing temperature, cooling rate, and additives in the filament.
You can compensate for shrinkage by scaling up the model before printing. For example, if you are using a filament with a shrinkage rate of 0.8%, you can scale up the model by 0.8% before printing.
3D printed plastic shrinks because it expands slightly when heated to high temperatures during printing. As the material cools, it starts to shrink back down, reducing the overall dimensions of the print.
PLA has a lower shrinkage rate compared to ABS. The average shrinkage rate of PLA is 2%, while ABS can shrink by up to 8%.
