Difference between screw barrel and ball screw

Update:25-05-2019
Summary:

The screw consists of a feed section, a compression sec […]

The screw consists of a feed section, a compression section and a metering section. 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, and the like. Screws and barrels are the core components of plastic molding equipment.

Working principle: plastic transportation, compaction, melting, stirring and pressing. This is done by rotating the screws in the bucket. As the screw rotates, the plastic creates friction and mutual motion between the inner wall of the barrel, the bottom surface of the screw groove, the advancement surface of the screw edge, and the plastic and plastic. The forward movement of the plastic is the result of this combination of motion, and the heat generated by the friction is also absorbed to increase the temperature of the plastic and the molten plastic. The design of the screw will directly affect the extent of these effects.

The screw consists of a screw, a nut and a ball. Ball screws are commonly used transmission components in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion or torque into axial repeating force, featuring high precision, reversibility and high efficiency. Ball screws are widely used in various industrial equipment and precision instruments due to their low frictional resistance.

Ball screws are used to convert rotational motion into linear motion. Or convert linear motion into rotary motion, which has the advantages of high transmission efficiency and accurate positioning. When the ball screw is used as the driving body, the nut will be converted into a linear motion according to the rotation angle of the screw according to the corresponding specification. The passive workpiece can be connected with the nut through the nut seat, thereby achieving the corresponding linear motion.