Cooperative learning (CL) is instruction that involves students working in teams to
accomplish a common goal, under conditions that include the following elements
(Johnson, Johnson, and Smith, 1991):
1. Positive interdependence. Team members are obliged t
The Sand Casting process - aka Green Sand Mold process - is commonly
used in the casting of aluminum, brass/bronze, and iron products.
The term "green sand" is known principally because of the moisture content
within the sand. The sand undergoes a "mullin
Molding or moulding is the process of manufacturing by shaping pliable raw material
using a rigid frame or model called a pattern.
A mold or mould is a hollowed-out block that is filled with a liquid like plastic, glass,
metal, or ceramic raw materials. T
There are approximately 400,000 types of mold, of which less than 100,000 have been named.
Approximately 1,000 types of mold are found indoors acoss America. Less than 80 molds are
suspected of causing some form of illness, and only a few of
The single most important issue in the workshop/Lab is
safety. The primary objective of all people that use the
student shops must be to uphold safety in the student shops.
You should familiarize yourself with the basic safety
parameters of an
Skin Dried Molding
Skin-dried or air-dried molds are sometimes preferred to green sand molds
where assurance is desired that the surface moisture and other gas-forming
materials are lowered. By skin drying the face of the mold after special bonding