Joints can be separated into two classes: functional and structural. Joints are divided into three different functional classes. They are synarthroses, amphiarthroses, and diarthroses. Synarthroses means the joint is immovable, amphiarthroses means the joint is slightly moveable, and diarthroses means the joint is freely moveable.
minimum recommended protection lightweight and easy to use requires no maintenance osha cdc epa and nyc doh mh recommend using a n95 disposable respirator as minimum protection from mold and dust
Injection Mold. This type of mold is made is the original is thin walled and requires help other than gravity to insert the casting material. A two part mold is often the basis for a rubber injection mold. Once the mold is completed sprue holes are added to allow air and excess casting material to escape.