Cone crushers are popular rock crushing machines used in aggregates production, mining operations, and recycling applications. They are designed with a rotating mantle in a concave bowl, which is used to crush the rock that enters the crushing chamber. However, before delving into the mode of operation of cone crushers, here are some of the critical components of the equipment:

1. Mantle - The mantle is the moving part of the cone crusher, which is attached to the main shaft. This mantle rotates eccentrically inside the concave bowl, providing crushing action that squeezes the rock between the mantle and the concave bowl.

2. Concave bowl - The concave bowl is a fixed part of the cone crusher that serves as the crushing chamber. It is lined with manganese steel liners, which protect the mantle from wear and tear.

3. Main shaft - The main shaft is located inside the mantle, and it is responsible for transmitting the power from the motor to the mantle, which in turn, crushes the rock.

4. Eccentric - The eccentric is located at the bottom of the main shaft and is responsible for rotating the mantle.

Now, onto the mode of operation of cone crushers. As mentioned earlier, the mantle of the cone crusher rotates eccentrically inside the concave bowl. This movement causes the mantle to grind the rocks that enter the crushing chamber, located between the mantle and the concave bowl. The crushing action is achieved by a combination of compression and shearing action.

During the crushing process, the gap between the mantle and the concave bowl changes continuously. This is because the eccentric that rotates the mantle is not centered, and as it rotates, the distance between the mantle and concave bowl continuously changes. This action creates a smaller gap at the discharge end of the crushing chamber, which helps to produce a more uniform product size.

To adjust the gap between the mantle and the concave bowl, the operator can use hydraulic cylinders or manual wedges. The hydraulic cylinders are used in modern cone crushers to adjust the gap automatically, while the manual wedges are used in older cone crushers to maintain the gap manually.

Finally, one important aspect of operating a cone crusher is maintaining safety. The operator must ensure that the equipment is operated safely and must follow the manufacturer's instructions. The equipment must be properly lubricated, and undergo regular maintenance to avoid any unplanned downtime.

In closing, cone crushers are essential rock crushing machines that are used in various applications. The mode of operation involves crushing the rock by a rotating mantle in a concave bowl. To adjust the gap between the mantle and the concave bowl, hydraulic cylinders or manual wedges are used. Maintaining safety is critical to avoid any accidents or unplanned downtime.