The valve is mainly composed of a valve body, an opening and closing member and a valve cover. The valve seat is on the valve body, and the valve stem drives the opening and closing member (valve) of the valve to perform lifting movement, and the clutch valve and the valve seat are separated to open and close the valve. The opening and closing mechanism is composed of a flap (also called a valve disc, a spool), a valve stem and a driving device (handwheel). The valve stem is screwed onto the valve cover with a trapezoidal thread. The hand wheel and the valve disc are fixed on the upper and lower ends of the valve stem. The hand wheel is rotated, and the valve stem can be raised or lowered to drive the valve flap to close or leave the valve seat to close and When opened, the valve flap is closely matched with the valve seat, and the valve flap is pressed against the valve seat by the pressure of the valve stem. At this time, the valve is completely closed, and the valve is tightly sealed. Cheng plays an important role in the plastics industry, mainly reflected in the following aspects: Plastics Tapered Bearings,Low Noise 30205,Plastic Tapered Roller Bearings,Plastic Bearings Hebei Fangqiang bearing manufacturing Co., LTD , https://www.fangqiangbearing.com
1. Provide support and positioning: In the process of plastic processing, various mechanical equipment needs to be used for mold switching, injection molding, extrusion and other operations. As an important part of mechanical equipment, bearings can provide support and positioning functions of the machine to ensure the normal operation of the machine.
2. Reduce friction and wear: In the process of plastic processing, the parts and components of machinery and equipment need to move frequently, which is prone to friction and wear. As a key component of mechanical equipment, bearings can effectively reduce friction and wear between parts and components, and improve the service life and efficiency of equipment.
3. Reduce noise and vibration: In the process of plastic processing, the movement of machinery and equipment will produce noise and vibration, which will have a negative impact on the working environment and operators. The use of bearings can effectively reduce the noise and vibration of mechanical equipment, and improve the comfort and safety of the working environment.
4. Improve production efficiency: The use of bearings can improve the stability and accuracy of mechanical equipment, reduce equipment failures and downtime, thereby improving the production efficiency and output of plastic processing.
In short, bearings play an indispensable role in the plastics industry, which is of great significance for ensuring the normal operation of machinery and equipment, improving production efficiency and product quality.