A:Bubble breaking is common and difficult in the production of PVC sheath foam board. The reasons are poor quality of raw materials, improper process parameters and unreasonable mold design. The countermeasures are strict selection of raw materials, optimization of process parameters and reasonable design of molds. It is of great significance to deeply understand the reasons and deal with them to improve product quality and production efficiency.
A:Adjust the calendering pressure of the three-roll calendering machine by changing the distance between the rollers mechanically or adjusting the pressure using the hydraulic system. Also need to consider the material characteristics, first trial production to observe the effect and then gradually adjust. Set the initial value with reference to the process parameters, and operate carefully to avoid pressure sudden changes affecting product quality and equipment operation.
A:Three roll calender has many characteristics and advantages. Its structure is compact and occupies small space. It can accurately control temperature and pressure, so that the surface of the sheet is smooth and smooth, and improve the product quality. It also has efficient cooling function, high production efficiency, flexible and simple operation, and stable operation, effectively reduce the incidence of failure and save maintenance costs.
A:Three-roll calender plays a crucial role in the production of plastic sheets and related fields. It is a key device to ensure that plastic sheets have excellent surface quality and accurate dimensions. It plays an indispensable role in improving the flatness and gloss of the sheet, as well as optimizing the physical properties of the sheet.
A:The main function of the plastic dryer is to remove the water in the plastic raw materials and provide dry raw materials for the extrusion process. If the moisture content of plastic raw materials is too high, it will affect the quality of extruded products, such as bubbles, defects, and so on.
A:The methods to improve the energy saving of plastic dryers are: optimize the drying process, accurately control the temperature and time; Upgrade the equipment with efficient heating elements and reasonable air ducts; Recovery of waste heat; Strengthen heat preservation; Reasonable selection; Use intelligent control. Combining these measures can significantly reduce energy consumption, improve efficiency, and realize energy saving and environmental protection production.
