Ammonoids are an extinct group of marine mollusc animals. They are excellent index fossils, and it is often possible to link the rock layer in which a particular species or genus is found to specific geologic time periods. Their fossil shells usually take the form of planispirals, although there were some helically spiraled and nonspiraled forms (known as heteromorphs). I used in my assigment oil clay, and I molded amonite. And this is the final product I scaned the piece in MakerBot Digitizer and edited in MeshMixer MOLDING 1. VCarve is Software that I used 2. The material that I mecanized was blue wax bar Wax Waxes are a diverse class of organic compounds that are hydrophobic, malleable solids near ambient temperatures. They include higher alkanes and lipids, typically with melting points above about 40 °C (104 °F), melting to give low viscosity liquids. Waxes are insoluble in water but soluble in organic, nonpolar solvents. Natural waxes of different types are produced by plants and animals and occur in petroleum. I will use cast, and it is perfect because cast not damage wax. 3. For milling I used: a. 1/8 Tapered Ballnose Plaster 77-102 b. Diameter: 0.125 inches c. Cutting Parameters: Pass depht (0.0625 in), Stepover (0.0133in) d. Feeds and Speeds: Spindle Speed (6000rpm), Feed (100in/min) and Plug rate (50in/min). 4. 2cm deep molding Silicone SILICONE: Silicones, also known as polysiloxanes, are polymers that include any inert, synthetic compound made up of repeating units of siloxane, which is a chain of alternating silicon atoms and oxygen atoms, frequently combined with carbon and/or hydrogen. They are typically heat-resistant and rubber-like, and are used in sealants, adhesives, lubricants, medicine, cooking utensils, and thermal and electrical insulation. Some common forms include silicone oil, silicone grease, silicone rubber, silicone resin, and silicone caulk. HEAT AND COLD RESITANCE: Silicon Ribber can be used at 150 C, and also has excellent resistance to cold temperatures. Silicone Rubber have exceptional weatherability. It can be exposed to wind, UV rays and rain with no change in physical properties. It can be inmersed in water and no change its mechanical or electrical properties. Silicon Rubber also has excellent resistance to solvents and other chemicals. Personal care: Silicones are ingredients widely used in skin care, color cosmetic and hair care applications. Silicone rubber is commonly used in baby bottle nipples (teats) for its cleanliness, aesthetic appearance, and low extractable content. Silicones are used in shaving products and personal lubricants. MSDS: Material Safety Data Sheet can find here The molding that we use was Silicone Rubber. Product recomendation: 100% Silicone, 100% Catalizer. But in practice, ideal messure is 100% silicone rubber, 25% catalizer. Mix the composition and when it gets tough it's time to pour it. Maybe 3 or 4 minutes. Allow the mixture to stand for long enough. Curing time is 2 or 3 hours. This is the final product in silicon rubber CASTING Gypsum/Cast Gypsum was casting that I used Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is widely mined and is used as a fertilizer, and as the main constituent in many forms of plaster, blackboard chalk and wallboard. OCUPATIONAL SAFETY: People can be exposed to gypsum in the workplace by breathing it in, skin contact, and eye contact. MSDS: Material Safety Data Sheet can find here PROPERTIES PROCESS 1. Mix the gypsum with water to form a paste 2. Pour the contents in cast 3. Let it dry for about 2-3 hours 4. With aging products you can have you own fossil CONCLUSION It was very nice saw the wax milling, I think the posibilyties to work in wood and milling it. You can save time and money when you use molding and casting. these processes can increase your performance. MSDS is very important when you use the products with health risks. Protect with safety elements DOWNLOAD All files Download
