With the continuous advancement of the molding technology of the calender, the improvement of the resin modification and the formulation of the additive, the range of materials suitable for calendering has been greatly expanded,
and the application range of the
plastic calender is more and more extensive. The plastic calender and its linkage auxiliary machine form a plastic calender production line, which is one of the basic equipments in the production process of plastic products and belongs to large-scale high-precision equipment. The calender has been used in plastics processing for more than 100 years. During the period of continuous improvement, large-scale high-precision equipment, plastic calender and calender auxiliary machine are one of the most basic equipments in the production of plastic products.
At present, the speed control system using the high precision variable current technology of the semiconductor integrated circuit has matured. The plastic calender is mostly equipped with a full digital speed control system, and the main motor of the drive is still a DC motor. Most of the auxiliary motor drive motors have adopted AC variable frequency motors. The transmission control system of the plastic calender production line is a micro-tension speed linkage control system. This system must be an adjustable speed, high precision steady speed system. The speed adjustment range usually requires 1:10. In the speed and current double-closed DC speed control system, the photoelectric encoder is used as the digital speed feedback with an accuracy of 0.01% and a comprehensive precision of 0.01%.
The plastic calender production line needs to control the equipment step by step and in sequence for each control stage according to a preset sequence and conditions. Some are in order to control the equipment in order to be safe. These are called logic control systems. In order to realize these control requirements, the plastic calender production line machine adopts industrial computer for monitoring and management of the whole production line. The lower machine uses PLC to detect and control each device on the field through the field bus. The production line is generally equipped with a man-machine interface operating system.
With the development of product processing technology and the improvement of product quality requirements, the development of plastic calender production line has entered a period of rapid development. At the same time, due to the advancement of science and technology, the requirements for safety, environmental protection and energy saving of plastic calender production are constantly improving. Plastic calenders are constantly developing in the direction of large-scale, high-precision, high-efficiency and high-automation.
According to market demand analysis, the demand for pvc rolled products in the market is growing rapidly. First of all, with the development of the market economy, people's awareness of advertising has gradually increased, and the demand for PVC light box cloth has gradually increased. The demand for high-end products (with a width of more than 3 meters) will increase significantly, medium and low. The market demand for products will gradually slow down. Secondly, with the continuous improvement of the living standards of the people, the demand for furniture has risen sharply, and the demand for PVC furniture packaging film is large. Furthermore, the pharmaceutical industry and the food industry are growing rapidly, and the demand for PVC sheets in the market is also growing rapidly. In addition, due to environmental protection and labor costs, developed countries have gradually phased out the production of PVC rolled products. Mainland China has become the world's largest production base for PVC products. Many enterprises have exported products mainly for export, and medium and high-grade products for export products. Lord, there is a lot of room for development in the market.
Of course, with the in-depth implementation of the state's macro-control policies, the development of calendered products has entered a stage of rational development, and the market has entered a period of phased adjustment. However, the above-mentioned four products are more developed in the region of expanding production scale or improving product specifications and grades. The development direction is mainly wide and high precision. In line with this, the development trend of plastic calender production lines is still large, high speed, high precision, high automation and specialization.
Non Woven Sanding Belt
Surface conditioning non woven Sanding Belt
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Application:
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