The difference between bolt and lead screw

The bolt consists of a feed part, a compression part and a metering part. The outer surface of the screw is a cylinder with a spiral groove or a cone with a conical spiral groove. Screws are used in plastic molding equipment, such as plastic profile extruders, injection molding machines, molding machines, rubber machines, etc. Screw and barrel are the core components of plastic molding equipment.

Working principle: used for transportation, compaction, melting, mixing and extrusion of plastics. These are all done by the rotation of the screw in the barrel. When the screw rotates, the plastic will generate friction and mutual movement between the inner wall of the barrel, the bottom surface of the screw groove, the advancing surface of the screw edge, and the plastic and the plastic. The advancement of the plastic is the result of the combination of movement, and the heat generated by friction is also absorbed, thereby increasing the temperature of the plastic and melting the plastic. The design structure of the screw will directly affect the extent of these effects.

    The screw consists of a screw, a nut and a ball. Ball screw is a transmission element often used in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or convert torque into axial repetitive force, it has high precision, reversibility and high efficiency. major. Because the friction resistance of the ball screw is small, it is widely used in various industrial equipment and precision instruments.

Working criteria:

A ball screw (which has basically replaced a trapezoidal screw, often called a screw) is an actuator used to convert rotary motion into linear motion. Or convert linear motion into rotary motion, with high transmission efficiency and accurate positioning. When a ball screw is used as a movable body, the nut will convert into linear motion according to the lead of the corresponding specification and the rotation angle of the screw. The passive workpiece can be connected by the nut seat and the nut to realize the corresponding linear movement.