"Energy saving, precision and high efficiency" is not only a tactical problem for the development of China's plastics processing industry and equipment manufacturing industry, but also a strategic problem. Because it is closely related to China's development of "energy-saving society", "environment-friendly society", "sustainable development strategy", "scientific concept of development", "energy saving and emission reduction" and "innovative country"; because it is the condition to support China's plastic products and machinery and equipment to enter the international market; because it is an effective way for domestic enterprises to get rid of low-level, low-profit and price war; because it is the basic principle for enterprises to adjust their product structure, technological innovation and mechanism innovation.
"Energy saving" must first realize that saving resources is energy saving. Plastic processing and its equipment should try their best to reduce the consumption of raw materials, the consumption of resins, and the consumption of steel and other non-ferrous metals, because from ore smelting to parts processing is a "giant" of energy consumption and environmental pollution ". For injection molding machines, it is necessary to do everything possible to simplify and reduce the structure of clamping parts and plasticizing parts. And strive to reduce the weight of each part; Another important meaning of "energy saving" is to reduce the consumption of land resources. Plastic processing equipment should strive to be compact in structure and reduce the floor area and use space of plastic molding workshops. "Energy saving" should emphasize the comprehensive and detailed plugging of loopholes in energy consumption, reduce the consumption of various forms of energy such as electrical energy, thermal energy, mechanical energy, hydraulic energy, etc. during the operation of the machine.
"Energy saving" should pay special attention to the energy consumption of polymer materials in the processing process, because polymer materials in the "plasticizing device" to go through heating, conveying, mixing, shearing, homogenizing, plasticizing and melting, to experience from the glass state-viscoelastic state-viscous flow state phase change process, the middle to consume a lot of heat energy and mechanical energy, it is necessary to study many aspects such as processing methods, processing equipment, processing technology and modification of polymer materials to form a joint force centered on "energy saving" in order to be effective.
Originally, plastic processing and its equipment bear the glorious mission of "substituting plastic for steel", "substituting plastic for wood" and processing "plastic alloy", and play an important role in the field of "energy saving and environmental protection. But unfortunately, today's plastic processing, such as injection molding, extrusion, hollow molding, etc. is a large energy consumer. For example, an injection molding machine with a clamping force of 3600t has a body weight of 300 tons, and the power for driving the oil pump is six 55KW motors with a body length of 24m and an area of 120 m2. The diameter of the barrel is 320mm, the length is 7m and is full of heating rings with a heating capacity of 270KW. The fuselage is filled with 5760 litres of hydraulic oil. When injected, under the action of 14MPa oil pressure, the hydraulic oil flow rate reaches 1000 litres, moreover, it continuously circulates at a high speed at a temperature 27°C -32°C higher than room temperature, and a large amount of heat energy is emitted to the environment. If, according to the average data of raw materials and heat energy consumed by injection molding machines, and calculated by 70000 domestic injection molding machines per year, the steel resources consumed by only injection molding machines in a year are as much as 20 million tons, the heating power capacity is more than 25 million KW, and the hydraulic oil consumed is as high as 175 million liters. From this point of view, plastic processing and its equipment has become a veritable energy consumer. When our government is working hard to establish an "energy-saving society" and calling for "energy saving and emission reduction" to start from everyone, it is really necessary for our plastic processing industry and its equipment manufacturing industry to move a "major operation. This requires accelerating the adjustment of product structure through "original innovation" and "integrated innovation", and transforming injection molding machines, extruders, hollow molding machines and other equipment with the goal of "energy saving, precision, and high efficiency.