Bowling pins have been around for as long as bowling has been around, and it is believed to have originated sometime during the Stone Age. Obviously the game has changed since then, and the construction has changed considerably, but bowling pins are a necessity in the game of bowling. Now, there is even diversity in the sizing of bowling pins depending on the rules and the game. The five most common bowling pins are:
Five-pin Bowling: Tall pins that are the target of a handheld ball with no holes, and often they have some sort of rubber girdle stretched around the middle. These pins are not very common in the United States.
Duckpin: Also the target of a handheld ball with no holes. Duckpins tend to be short and fat.
Candlepin: These pins are tall and thin. They slightly resemble a candle stick that is tapered at both ends.
Nine-pin Bowling: These pins are usually seen with strings up at the top, and are usually the target of a ball without holes.
Bowling pins are constructed from layers of hard rock maple wood laminated together. Some major pin manufacturers such as Brunswick actually will not make pins from trees south of Indiana. The slower a tree grows, the denser the wood gets. Since the wood is denser, it is also harder. Trees north of Indiana grow slower because when winter hits, the trees are forced to stop growing.
Modern wooden pins are then placed into an injection molding machine. The injection molding machine then engulfs the wood within a casing made from plastic. The plastic provides the pin with two purposes. One, it allows an added layer of protection for when a 16 lb. bowling ball come hurdling into it. Two, it supplies manufacturers and advertisers a place to display their logo.
After the plastic casing is finished, there really is not much else to do than to remove any imperfections from the plastic, and get whatever logo will be adorning the outside of the bowling pin on to it.