Knowde Enhanced TDS
Identification & Functionality
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
Applications & Uses
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
- Recommended Preparation
SHELL CASTING
- Scale pattern models to account for foundry shrinkage.
- Hollow pattern model with 0.8-1.2mm wall and lattice infill 8-10mm cell size using stl editor. Include multiple drain and vent holes Ø3-6mm to allow removing resin from interior and avoid cupping during printing.
- After printing wash with xCLEAN or IPA for 5-10 minutes. Don’t rinse with water – material is hydroscopic.
- Post-Cure in UV chamber 60 minutes at room temperature in cure oven with 405nm light source and 5-30mW/cm2 intensity.
- Tree up with standard foundry wax and shell same day as curing. If patterns have sat, rinse in clean IPA 2 hours before assembling tree – additives in the polymer can leech out and affect surface finish.
- Burn out 1050°C for 2.5hrs in ventilated oven, blow out mold with air to remove any ash before pouring.
FLASK CASTING
- After printing wash with xCLEAN or IPA for 5-10 minutes.
- Don’t rinse with water – material is hydroscopic.
- Post-Cure in UV chamber 60 minutes at room temperature in cure oven with 405nm light source and 5-30mW/cm2 intensity.
- Tree up with standard foundry wax and shell same day as curing. If patterns have sat, rinse in clean IPA 2 hours before assembling tree – additives in the polymer can leech out and affect surface finish.
- Follow instructions of the investment powder for preparation. Recommended powders are Plasticast, Omega+, and Prestige Optima. Use virgin powder only. Burn-out in a ventilated oven (oxygen is required to fully burnout the pattern). Start burnout 5 hours after preparation of the cylinder. Invert cylinder 2 hours before casting to evacuate gasses and ash. Follow this burnout cycle and ramp rates:
Temperature Time Rate 150°C 2 hr 4°/min 750°C 6 hr 4°/min 650°C 1 hr 4°/min Pattern may be printed solid, hollowing recommended for sections > 5mm across. Use 1mm wall thickness.
Properties
- Color
- Appearance
- Yellow
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Specific Gravity (25°C) | 1.1 | g/cm³ | — |
| Tensile Modulus | 200 | MPa | ASTMD368 |
| Tensile Stength | 9 | MPa | ASTMD368 |
| Elongation at Break | 8 | % | ASTMD368 |
| Flexural Strength | 13 | MPa | ASTMD790 |
| Flexural Modulus | 255 | MPa | ASTMD790 |
| Hardness | 59 | Shore D | ASTMD2240 |
| HDT (at 1.81MPa) | 32 | °C | ASTMD648 |
Storage & Handling
- Storage Information
- Store product in the unopened container in a dry location.
- Storage information may be indicated on the product container labeling.
- Optimal Storage : 8°C to 21°C.
- Storage below 8°C or greater than 28°C can adversely affect product properties.
- Material removed from containers may be contaminated during use. Do not return product to the original container. Nexa3D cannot assume responsibility for product which has been ontaminated or stored under conditions other than those previously indicated.