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SiOmaster resin - AmeraLabs

AmeraLabs

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Resin for 3D printing master molds for silicone and rubber injection molding.

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In the realm of manufacturing, 3D printing serves as an initial step in the transition from digital models to physical objects, particularly for industrial parts, prototypes, and miniatures. As production scales, spin casting and injection molding emerge as preferred methods, leveraging silicone molds derived from 3D printed master models.

The SiOmaster resin

Image 1: The SiOmaster resin. Source: SioCast.

The SiOmaster resin, developed by AmeraLabs in collaboration with SioCast, excels in capturing and preserving fine details crucial for mold creation. Its optimal balance of flexibility proves indispensable during the rigorous silicone vulcanization process. Under high pressure and temperature, it remains resilient, preventing breakage or deformation, thus safeguarding the integrity of intricate details while upholding dimensional precision. Furthermore, the SiOmaster resin boasts user-friendly features, including easy support removal and sanding, alongside minimal shrinkage.

A test part 3D printed with the SiOmaster resin

Image 2: A test part 3D printed with the SiOmaster resin. Source: SioCast.

SiOmaster resin is tailored for professionals operating spin casting and SiOCAST injection molding machines. Designed to facilitate the creation of master models, it endures high-temperature silicone rubber vulcanization, reaching up to 180 °C, multiple times without compromising integrity. This resilience permits the reuse of master models for the production of numerous molds, optimizing efficiency and resource utilization.

Compatible 3D printers

The SiOmaster resin is compatible with both MSLA (Phrozen Sonic Mini 8K, Anycubic Photon M5, Zortrax Inkspire, etc.) and DLP (Anycubic Photon Ultra or Photon D2) resin 3D printers with 385-420 nm light sources. However, it's important to note that the SiOmaster resin cannot be used with laser-based resin 3D printers which utilize VAT trays lined with PDMS silicone (e.g., Formlabs 3D printers). 3D printing profiles for this resin can be consulted here.

SiOmaster Safety Datasheet

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Printing

For those who are only beginning their adventure with resin 3D printing, we recommend reading the Beginner's Guide to AmeraLabs resins as well as referring to the troubleshooting guide prepared by AmeraLabs in case any problems occur while 3D printing with the SiOmaster resin.

Post-processing

Parts 3D printed with the SiOmaster resin will achieve their specific properties only after being subjected to post-processing by washing and curing.

Washing

AmeraLabs recommends using IPA alcohol for the washing and the washing time will largely depend on the washing equipment used. If a washing station is used, the average washing time is 12 minutes and a second wash of 6 minutes if required. If an ordinary bucket system and manual cleaning are used, the parts should be submerged for 10 minutes, swirled for 1 minute, submerged for another 10 minutes in clean IPA, and swirled again for 1 minute. If an ultrasonic cleaner is used, it is recommended not to go over 10 minutes of cleaning. Overall, parts 3D printed with this resin should not be sumberged in IPA alcohol or any other liquid for longer than 40 minutes as it can damage the part.

Support removal

In the case of complex parts, it is recommended to remove the support structures after post-curing to avoid part warping. Thick supports may be tricky to remove, thus AmeraLabs recommends softening them with a heat gun or hot water before removing them from the print. 

Post-curing

Once washed, the parts 3D printed with the SiOmaster resin must be dried and cured immediately with the help of a curing station. The recommended curing times will depend on the used equipment but can range from anywhere between 5 to 60 minutes (until the surface of the part is not sticky anymore). The rule of thumb is that parts should be cured until not sticky anymore.

The longer the post-curing time, the stiffer, less flexible and more durable the part will be. This means that it will not be likely to bend during vulcanization. Nevertheless, post-curing times that are too long may lead to the part handling fewer vulcanizations cycles before breaking.

Vulcanization

In order to ensure successful vulcanization, the users must adhere strictly to the guidelines provided by the silicone manufacturer regarding both vulcanization duration and temperature, as well as proper mold de-gassing. A suitable releasing agent such as SiOCAST must be used to prevent adhesion between the masters 3D printed with the SiOmaster resin and the silicone rubber. Lastly, routine inspections must be carried out to verify the alignment between the vulcanization machine and mold frames.

Safety

Certain precautions must be taken when working with 3D printing resins. The user must ensure that the working space is adequately ventilated, and that protective goggles, gloves and garments are worn at all times. The SiOmaster resin should be stored in a tightly closed container/resin vat to avoid resin deterioration due to UV exposure. The container/vat should be kept in a cool, well ventilated area away from heat, sparks and open flame. To get a better idea of how to work with the AmeraLabs resins safely, please read the manufacturer's blog post on the most common resin safety myths.

General Information
Manufacturer AmeraLabs (Lithuania)
Technology LED/LCD / DLP
Material Photopolymer
Wavelength 385-420 nm
Format 0.5 liters / 1 liter / 5 liters
Color Grey
Compatible 3D Printers Check here
Printing Properties
Layer Height Check here
Layer Exposure Time
Layer Cooling Time
Lift Height
Lower Layers Exposure
Number of Lower Layers
Curing and Washing Properties
Washing Time 18-24 min / IPA alcohol
Curing Time 5-60 min
Curing Temperature -
Mechanical Properties
Viscosity -
Izod Impact Strength -
Charpy Impact Strength -
Elongation at Break -
Tensile Strength -
Tensile Modulus -
Flexural Strength -
Flexural Modulus -
Surface Hardness -
Thermal Properties
Vulcanization temperature 90-180 ºC
Softening Temperature -
Gloss Value -
Additional Information
Shelf Life -
HS Code 2916.1

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