10. Molding and casting¶
group assignment:¶
- Review the safety data sheets for each of your molding and casting materials.
- Make and compare test casts with each of them.
- Compare printing vs machining molds.
Silicone¶
Zhermack Industrial Silicone rubbers for industrial applications (.pdf)
Name | Colour | Main Applications | WT (@ 23°C) | ST (@ 23°C) | Hardness (ShA) | Visc (cP) | Tear (N/mm) |
---|---|---|---|---|---|---|---|
ZA 13 Mould WT45 | translucid | Mould making | 45’ | 4h | 13 | 4.500 | 10 |
The properties of ZA 13 Mould WT45 are as follows:
- Colour: Translucent
- Main Applications: Mould making
- WT (@ 23°C): 45 minutes
- ST (@ 23°C): 4 hours
- Hardness (ShA): 13
- Visc (cP): 4,500
- Tear (N/mm): 10
These properties indicate that ZA 13 Mould WT45 is a translucent silicone material primarily used for mould making. It has a working time of 45 minutes at 23 degrees Celsius and takes approximately 4 hours to fully cure. The material has a hardness of 13 on the ShA scale, indicating a relatively soft and flexible texture. It has a viscosity of 4,500 cP, which suggests that it is relatively thick and has good flow characteristics. The tear strength of 10 N/mm indicates that it has good resistance to tearing or breaking under stress.
Here is a link to the Safety Data Sheet for this Silicone: - ZA 13 Mould WT45 Safety Data Sheet
The AI asssistant in Acrobat listed this text from the document:
- ZA 13 MOULD WT 45 CATALYST is a mixture used for industrial/professional mold making.
- The product is not classified as dangerous according to Regulation EC 1272/2008 (CLP).
- The hazardous components in the mixture are Dodecamethylcyclohexasiloxane- D6 and octamethylcyclotetrasiloxane; [D4].
- Safety precautions include:
- Washing with water and soap for skin contact
- Rinsing with water for eye contact
- Seeking medical advice for eye contact
- Not inducing vomiting for ingestion
- Seeking medical examination for ingestion
- The product is not classified for chronic aquatic hazard, but the main substances have aquatic acute toxicity and are not readily biodegradable.
- The safety data sheet has been updated in compliance with Regulation 2020/878 and provides information on hazard classes and categories.
- The classification procedure for Aquatic Chronic hazard is based on conclusive scientific experimental data.
- The document was prepared by a competent person and includes definitions for various acronyms and terms related to hazardous substances.
Hydro Stone¶
https://plaster.com/product-comparison-chart/
- HYDRO-STONE® SUPER X GYPSUM CEMENT
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Wear skin protection gloves
- Wear safety googles
individual assignment:¶
- Design a mold around the process you’ll be using.
- Produce it with a smooth surface finish.
- Use it to cast parts.
- Extra credit: Use more than two mold parts.