The world of automotive customization and repair is constantly evolving, with 3D printing emerging as a powerful tool for creating custom car parts. While the accessibility of 3D printing opens up exciting possibilities for vehicle owners, understanding material limitations is crucial, especially when it comes to “Parts To A Car”. One common material, PLA (Polylactic Acid), often touted for its ease of use in 3D printing, might seem like a viable option. However, for car parts exposed to the harsh realities of temperature fluctuations, particularly inside a vehicle, PLA falls short.
My own experience highlights this limitation. I attempted to print sun visor hinge pins for a car using PLA. These weren’t even in direct sunlight, yet after just one day in moderate sun – temperatures around 29°C (85°F) – the PLA pin deformed. This was merely a test print for fit; the final pin was intended to be PETG. Even with PETG, a material with better heat resistance than PLA, slight deformation occurred under intense heat within the car. While parts positioned lower in the car might experience slightly less extreme temperatures, the risk of PLA deforming or failing under heat stress remains significant.
For components that require durability and heat resistance, especially essential “parts to a car”, consider materials like Nylon (Polyamide, PA), ABS, or high-temperature resistant co-polymers such as Amphora HT5300. The market offers a wide selection of filaments designed for demanding applications. For non-load-bearing, low-stress parts like covers or bushings, PLA could be considered. However, for any part where structural integrity and heat resistance are paramount, it’s best to avoid PLA and opt for more robust materials from the outset.
Technical data sheets from filament manufacturers clearly outline these limitations. Ultimaker’s data sheet for PLA explicitly states: “Not suitable for long term outdoor usage or applications where the printed part is exposed to temperatures higher than 50 °C (122 °F).” Similarly, for Nylon, while offering improved heat resistance, Ultimaker notes: “Not suitable for applications where the printed part is exposed to temperatures higher than 80 °C (176 °F).”
To provide a broader perspective, here are general temperature guidelines for various 3D printing materials in automotive applications:
- Basic Co-Polymers: Up to 70 °C (158 °F)
- ABS: Up to 85 °C (185 °F)
- Enhanced Co-Polymers and ASA: Up to 100 °C (212 °F)
- Polypropylene (PP): Up to 105 °C (221 °F)
- Polycarbonate (PC): Up to 110 °C (230 °F)
Choosing the correct material for “parts to a car” is not just about printability; it’s about ensuring longevity, functionality, and safety. For automotive applications, prioritize materials that can withstand the temperature demands of a vehicle environment, ensuring your 3D printed parts perform reliably over time.
