Disposable pens are made from plastic while refillable pens are made from either metal or plastic.
Some ballpoint pens have a retractable tip that is attached to a spring, which can be retracted or deployed by a button at the top of the pen.
Small pieces of metal are fed into a molding machine, which liquefies the metal and pours it into a compression chamber.
The compression chamber injects the liquefied metal into a die cast mold, which cools the metal and forms the various pen pieces.
Virtually all ballpoint pens contain a significant amount of plastic.
Even the most expensive pens use plastic for the push button, ink cartridge, cap and tip.
The components are then cleaned and machine-cut according to the specifications of the pen for which they will be used.
The cut pieces are machine polished and cleaned again before being sent to assembly.
Ballpoint pen manufacturers use a variety of plastics, including high-density polyethylene, vinyl resins and thermosetting plastic, which remains rigid after being molded and cooled.
Ink is manufactured by combining a variety of chemicals, which are then mixed together and heated or cooled in order to facilitate the necessary chemical combinations.
Ballpoint pens are cheap and durable and are the writing instrument of choice in modern society.