Arevo, a Silicon Valley start-up, has produced the world's first 3D printed carbon fiber bike rack. 
  The traditional carbon fiber bicycle frame needs to pour carbon fiber and resin into the mold manually and then bake in the oven to melt the resin and glue the carbon fiber material, so it is expensive.
  Arevo combines 3D printing with network software and raw materials.
  The three-dimensional shape of the bicycle frame is printed by using the deposition head installed on the robot arm. The carbon fiber bundle can be placed and melted thermoplastic material to form the parts at one time. After the process is simplified, the production cost of the carbon fiber frame is only 300 dollars.