Pattern (casting)
Videos
In casting, a pattern is a replica of the object to be cast, used to form the sand mould cavity into which molten metal is poured during the casting process. Once the pattern has been used to form the
Wooden pattern for a cast-iron gear with curved spokes
The top and bottom halves of a sand casting mould showing the cavity prepared by patterns. Cores to accommodate holes can be seen in the bottom half of the mould, which is called the drag. The top half of the mould is called the cope.
Beeswax
Videos
Beeswax is a natural wax produced by honey bees of the genus Apis. The wax is formed into scales by eight wax-producing glands in the abdominal segments of worker bees, which discard it in or at the h
Bee hive wax complex
Beeswax cake
Commercial honeycomb foundation, made by pressing beeswax between patterned metal rollers
Fresh wax scales (in the middle of the bottom row)