Molding Casting
Objective for this assignment :
The assignment was to read the safety data sheet for different casting material and make a test cast with them.
To make the mold we used one of the current student's wax model.
What is a Mold ?
A mold is a hollow container used to give shape to molten or hot liquid material when it cools and hardens.
What is a Casting?
An object made by pouring molten metal or other material into a mould.
OOMOO-30
OOMOO-30 was used to make the mold.
* OOMOO 30 has negligible shrinkage.
* Volume ratio part A : part B , 1A : 1B
* Mix ratio 100A : 130B by weight.
* OOMOO 30 has a 30-minute pot life, with a six-hour cure time.
Find OOMOO 30 Datasheet here : OOMOO 25/30
OOMOO 30 Mold
PMC-780
To make mold we used Smooth-On PMC -780 DRY.
* Mix Part A and Part B in 1:2 ratio
* Pour your mixture in a single spot at the lowest point of the containment field.
* Curing - Allow the mold to cure (at least 48 hours) at room temperature (73°F/23°C) before demolding. Do not cure rubber in temperatures less than 65°F/18°C.
* Post Curing - After rubber has cured at room temperature, heating the rubber to 150°F (65°C) for 4 to 8 hours will increase physical properties and performance.
* Performance & Storage - Fully cured rubber is tough, durable and will perform if properly used and stored.
Safety Instructions
-Materials should be stored and used at room temperature (73°F/23°C).
-Humidity should be low
-Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk.
-Good ventilation (room size) is necessary.
Find OOMOO 30 Datasheet here : PMC-780 Dry
PMC-780 Mold
What is a Casting?
An object made by pouring molten/liquid metal or other material into a mould.
SmoothCast - 300 and 305
The Smooth-Cast® 300 Series of liquid plastics are ultra-low viscosity casting resins that yield castings that are bright white and virtually bubble free.
Easy to measure and mix - 1:1 mix ratio by volume - no scale required
Low viscosity - captures excellent detail - no degassing necessary
Resin cures to a bright white finish.
Find SmoothCast 300 Series Datasheet here : Smooth cast-300 Dry
Find SmoothCast 305 Series Datasheet here : Smooth cast-305 Dry
USG DryStone Casting Media
USG Drystone™ Casting Media is a unique product designed for the fabrication of solid cast interior use pieces. Because it requires absolutely no drying, it can be cast, painted, packaged and shipped in a single day. Placing the cast piece(s) in front of a fan yields a finished product in two hours that can be decorated in roughly 2-4 hours (after setting) with typical paint.
-For 100 Parts of drystone 18-20 parts of water must be mixed
-Curing takes about 30mins with the pot life of 10 mins
-Eliminates the need for expensive drying procedures
-Achieves the highest compressive strength in its category and highest early “green strength”
-Provides an environmentally safe alternative to resin-based products with respect to air quality
-Can be used with the majority of mold materials including silicone, latex, and urethane
-Offers a high density that produces a quality feel and excellent duplication of intricate details
-Can be aggregated for a variety of looks and feel.
Find Drystone Casting Media Datasheet here : Drystone
USG HydroStone® Super X Gypsum Cement
USG Hydro-Stone Super X Gypsum Cement is extremely hard, has high compressive strength, and has high water absorption resistance while giving extremely fine detail duplication.
-Use potable water at temperatures between 70 °F (21 °C) and 100 °F (38 °C).
-For 100 Parts of HydroStone 20-22 parts of water must be mixed
-Curing takes about 30mins with the pot life of 10 mins
-Sift or strew USG Hydro-Stone Gypsum Cement into the water slowly and evenly. Do not drop large amounts of USG Hydro-Stone Gypsum Cement directly into the water as proper soaking of the USG Hydro-Stone Gypsum Cement may not occur.
-To prevent air entrainment and provide a uniform, smooth surface, careful pouring of USG Hydro- Stone Gypsum Cement slurry is necessary. Agitation/vibration of the filled mold is a further step used to prevent air at or near the mold surface.
-All casts should be dried as quickly as is safely possible after manufacture so that maximum physical properties can develop. Dry to a constant weight.
-The maximum temperature at which USG Hydro-Stone Gypsum Cement molds are safe from calcination is 120 °F (49 °C).
Find HydroStone Casting Media Datasheet here : HydroStone Dry
Cast Output
1. OOMOO-30
2.PMC -780
3.Gypsum
4.Hydrostone X
5.Smooth Cast 300
6.SmoothCast 305
