Rubber manufacturing process

Petroleum processing plants transport powdered or liquid synthetic rubber to rubber manufacturing plants.

To use natural rubber, it is strong and big, and workers must first break it and dissolve it.

Mix rubber with ground pumice powder (which can make rubber slightly hard), iron oxide (which can make rubber pink), vegetable oil, sulfur and other substances.

Heat the mixture to mix sulfur with rubber to increase the strength of rubber and make it more durable.

Soft, still warm raw materials are sent to a punching machine (extruded into a mold) to make slender rubber rods. Cut the rubber rod into small pieces with a knife. After cooling, it was transported to the pencil factory to make an eraser on the pencil.

Erasers used alone are made by injecting heated rubber mixture into molds of various shapes. After cooling, the mold is opened and erasers of various shapes come out. Petroleum processing plants transport powdered or liquid synthetic rubber to rubber manufacturing plants.

To use natural rubber, it is strong and big, and workers must first break it and dissolve it.

Mix rubber with ground pumice powder (which can make rubber slightly hard), iron oxide (which can make rubber pink), vegetable oil, sulfur and other substances.

Heat the mixture to mix sulfur with rubber to increase the strength of rubber and make it more durable.

Soft, still warm raw materials are sent to a punching machine (extruded into a mold) to make slender rubber rods. Cut the rubber rod into small pieces with a knife. After cooling, it was transported to the pencil factory to make an eraser on the pencil.

Erasers used alone are made by injecting heated rubber mixture into molds of various shapes. After cooling, the mold is opened and erasers of various shapes come out.