The plastics machinery automation market exceeded 1 billion yuan in 2005, an increase of 5.6% year-on-year. At present, the automation products used in plastic machinery mainly include control systems, transmission control, motion control, human-machine interface and sensors.
Among them, transmission control, controllers and low-voltage electrical appliances are the three most important products in the plastics machinery automation market. In 2005, sales of these three types of products accounted for 48%, 23% and 15% of the total size of the press automation market, respectively.
The use of the main automation products of the plastics machinery industry is as follows:
1) Controller
At present, the control of plastic machinery in China mainly adopts dedicated controllers and PLCs, and a few low-end devices use relay controls. The control points of domestically produced plastic machinery are generally within 128IO, and the control points of a few large-scale plastic film production lines may exceed 6,000 IO points, using multiple PLCs and IPCs.
The types of controllers used for different types of plastic machinery are also different. Injection molding machines and small blow molding machines mainly use dedicated controllers (embedded products), and use a small amount of PLCs and relays; extrusion equipment mainly uses PLCs, and a small number use dedicated controllers. Auxiliary equipment mainly uses PLC and relay control.
Because the control of ordinary plastic machinery is relatively simple, and most of the machines are operated by a single machine, which is limited by the level of mechanical reliability, the reliability requirements of the control system for plastics machinery are not too high. Therefore, special controllers developed with embedded products can meet the requirements. Most of the users' needs have great advantages in terms of price, so they are widely used in the industry, especially in the injection molding machines, and they are also widely used in blow molding equipment. In the extrusion equipment, due to the high reliability of PLC, short development cycle and mature applications, the application of PLC occupies a dominant position. The PLC brands currently used in this industry include Siemens, Omron, Mitsubishi, NAIS, and LG. Siemens offers a range of PLC-based plastic mechanical controllers.
With the development of plastics machinery technology, the controller is not a simple action control, but includes integrated control of melt temperature, injection pressure, injection speed, pressure holding time, cooling process, and various parameters of the hydraulic circuit. In the past, most open-loop control systems were used, and they are currently developing toward closed-loop control. The new equipment has further requirements on the control ability and response speed of the controller. Traditional controllers based on embedded products are difficult to meet these requirements. Therefore, PLCs are mainly used in new types of equipment and large-scale equipment. The use of PLC in high-end and large-scale equipment and the use of dedicated controllers in medium and low-end equipment will not change in the plastics machinery industry in the next three years. The competitive price is the precondition for entering the market for the largest number of general plastics machinery controllers.
2) Drive
The transmission of plastic machinery mainly refers to the oil pump motor and the screw extruder motor, and the power is mostly between 5.5 and 55 KW. The higher power uses multiple motor solutions.
The characteristics of the production process of plastic machinery have great potential for energy saving. Taking injection molding machines as an example, the process of injection molding machines is generally divided into several stages including mode locking, plastic injection, melt glue, pressure keeping, cooling and mold opening. Different pressures and flows are required. For the oil pump motor, the injection molding process is in a changing load state. In the hydraulic system of the quantitative pump, the oil pump motor provides a constant flow at a constant speed, and excess hydraulic oil flows back through the relief valve. This process is called a high pressure section. Flow, this backflow will cause loss of energy. The use of a frequency converter can solve this problem. By adjusting the speed of the oil pump, the oil pump can provide appropriate oil pressure at various stages of the production of the injection molding machine to minimize the energy loss. The earliest users of frequency converters in plastic machinery were some end-users. System integrators provided them with frequency conversion energy-saving solutions for plastic machinery, and achieved remarkable results. As a result, more and more users of plastic machinery used frequency converters to transform their equipment. To cope with this demand, plastics machinery manufacturers have also started to use frequency converters on plastic machinery. Users of plastics machinery can choose models with inverters. In order to reduce one-time investment, most users still choose plastic machinery without frequency converters, and they can carry out frequency conversion energy-saving transformation in the subsequent use process.
The main purpose of using frequency converters in plastic machinery is to save energy, and the requirements for frequency converters are relatively low. Currently, the major suppliers on the market are able to provide frequency converter products that meet the needs of plastic machinery. Therefore, the price has become a key factor for entering the market. Domestic manufacturers have With certain advantages, they perform best in the plastics machinery industry.
3) Motion Control
Servo and motion control products are mainly used on all-electric plastic machinery to replace traditional hydraulic systems. Relative to the hydraulic system, the servo system has the advantages of high control accuracy, low maintenance, good production environment, high production efficiency and power saving. More and more applications are used in high-precision applications such as mobile phones and automobiles. Medical devices and other industries.
Due to the development of hydraulic plastic machinery, it can meet almost all requirements at present. Therefore, although all-electric plastic machinery has higher technical indicators, the excessively high cost has limited its rapid development in the market, with only a small amount of production. , but mainly to face the foreign market.
Although the price of servo products is decreasing, the hydraulic injection molding machine technology has also been greatly improved. Therefore, in the last few years, the application of servo products in China's plastics machinery industry will not change much, only on high-end models. Use it sparingly. Due to the nature of the servo products, plastic machinery manufacturers need external technology to provide them with solutions.
From the perspective of the plastics machinery automation market, the current growth of the industry mainly comes from the increase in the market for plastics machinery and accessory transmissions.
Among them, transmission control, controllers and low-voltage electrical appliances are the three most important products in the plastics machinery automation market. In 2005, sales of these three types of products accounted for 48%, 23% and 15% of the total size of the press automation market, respectively.
The use of the main automation products of the plastics machinery industry is as follows:
1) Controller
At present, the control of plastic machinery in China mainly adopts dedicated controllers and PLCs, and a few low-end devices use relay controls. The control points of domestically produced plastic machinery are generally within 128IO, and the control points of a few large-scale plastic film production lines may exceed 6,000 IO points, using multiple PLCs and IPCs.
The types of controllers used for different types of plastic machinery are also different. Injection molding machines and small blow molding machines mainly use dedicated controllers (embedded products), and use a small amount of PLCs and relays; extrusion equipment mainly uses PLCs, and a small number use dedicated controllers. Auxiliary equipment mainly uses PLC and relay control.
Because the control of ordinary plastic machinery is relatively simple, and most of the machines are operated by a single machine, which is limited by the level of mechanical reliability, the reliability requirements of the control system for plastics machinery are not too high. Therefore, special controllers developed with embedded products can meet the requirements. Most of the users' needs have great advantages in terms of price, so they are widely used in the industry, especially in the injection molding machines, and they are also widely used in blow molding equipment. In the extrusion equipment, due to the high reliability of PLC, short development cycle and mature applications, the application of PLC occupies a dominant position. The PLC brands currently used in this industry include Siemens, Omron, Mitsubishi, NAIS, and LG. Siemens offers a range of PLC-based plastic mechanical controllers.
With the development of plastics machinery technology, the controller is not a simple action control, but includes integrated control of melt temperature, injection pressure, injection speed, pressure holding time, cooling process, and various parameters of the hydraulic circuit. In the past, most open-loop control systems were used, and they are currently developing toward closed-loop control. The new equipment has further requirements on the control ability and response speed of the controller. Traditional controllers based on embedded products are difficult to meet these requirements. Therefore, PLCs are mainly used in new types of equipment and large-scale equipment. The use of PLC in high-end and large-scale equipment and the use of dedicated controllers in medium and low-end equipment will not change in the plastics machinery industry in the next three years. The competitive price is the precondition for entering the market for the largest number of general plastics machinery controllers.
2) Drive
The transmission of plastic machinery mainly refers to the oil pump motor and the screw extruder motor, and the power is mostly between 5.5 and 55 KW. The higher power uses multiple motor solutions.
The characteristics of the production process of plastic machinery have great potential for energy saving. Taking injection molding machines as an example, the process of injection molding machines is generally divided into several stages including mode locking, plastic injection, melt glue, pressure keeping, cooling and mold opening. Different pressures and flows are required. For the oil pump motor, the injection molding process is in a changing load state. In the hydraulic system of the quantitative pump, the oil pump motor provides a constant flow at a constant speed, and excess hydraulic oil flows back through the relief valve. This process is called a high pressure section. Flow, this backflow will cause loss of energy. The use of a frequency converter can solve this problem. By adjusting the speed of the oil pump, the oil pump can provide appropriate oil pressure at various stages of the production of the injection molding machine to minimize the energy loss. The earliest users of frequency converters in plastic machinery were some end-users. System integrators provided them with frequency conversion energy-saving solutions for plastic machinery, and achieved remarkable results. As a result, more and more users of plastic machinery used frequency converters to transform their equipment. To cope with this demand, plastics machinery manufacturers have also started to use frequency converters on plastic machinery. Users of plastics machinery can choose models with inverters. In order to reduce one-time investment, most users still choose plastic machinery without frequency converters, and they can carry out frequency conversion energy-saving transformation in the subsequent use process.
The main purpose of using frequency converters in plastic machinery is to save energy, and the requirements for frequency converters are relatively low. Currently, the major suppliers on the market are able to provide frequency converter products that meet the needs of plastic machinery. Therefore, the price has become a key factor for entering the market. Domestic manufacturers have With certain advantages, they perform best in the plastics machinery industry.
3) Motion Control
Servo and motion control products are mainly used on all-electric plastic machinery to replace traditional hydraulic systems. Relative to the hydraulic system, the servo system has the advantages of high control accuracy, low maintenance, good production environment, high production efficiency and power saving. More and more applications are used in high-precision applications such as mobile phones and automobiles. Medical devices and other industries.
Due to the development of hydraulic plastic machinery, it can meet almost all requirements at present. Therefore, although all-electric plastic machinery has higher technical indicators, the excessively high cost has limited its rapid development in the market, with only a small amount of production. , but mainly to face the foreign market.
Although the price of servo products is decreasing, the hydraulic injection molding machine technology has also been greatly improved. Therefore, in the last few years, the application of servo products in China's plastics machinery industry will not change much, only on high-end models. Use it sparingly. Due to the nature of the servo products, plastic machinery manufacturers need external technology to provide them with solutions.
From the perspective of the plastics machinery automation market, the current growth of the industry mainly comes from the increase in the market for plastics machinery and accessory transmissions.
Inflatable Toys High Frequency Welding Machine
Inflatable Toys High Frequency Welding Machine is a high frequency device, whose self-exited oscillator of the electron tube can produce high frequency electromagnetic field. And the plastic to be processed is in the high frequency electromagnetic field between the upper and low electrode. When its interior molecules are polarized and produce heat automatically by mutual movement and friction, it will be welded with the pressure of the die.
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