In recent years, under the promotion of national policies and industrial development, my country’s plastic machinery industry has made breakthroughs in the plastic raw materials, plastic processing industry, and plastic recycling industries. The export capacity of the plastic machinery industry has continued to increase. At the same time, the import of high-end plastic machinery products will Gradually replaced by domestic products, the number of imported products and the amount of imports gradually decreased.
According to the data released by the General Administration of Customs, the import volume of my country's plastic machinery products showed a downward trend in 2016-2019. Since 2016-2019, the export volume of my country's plastic machinery industry has continued to increase. Affected by the increase in the number of exported products, the export value of my country's plastic machinery industry has also shown an upward trend every year. From 2016 to 2019, the export value of my country's plastic machinery industry increased from US$2 billion to US$2.708 billion in 2019, with an average annual compound growth rate. Is 10.63%.
According to a calculation report of the German Engineering Federation, in 2020, China's total exports of 165 billion euros accounted for 15.8% of the global machinery and engineering trade. The total value of German exports of mechanical equipment and engineering is 162 billion euros. China surpassed Germany to top the list of world machinery and equipment engineering exports, which means that Germany is no longer the world's most important machinery and equipment trade exporter.
Ulrich Ackerman, the head of foreign trade of the German Engineering Federation, said in a report: The economic recovery plan can ensure that the exports of machinery and equipment from Germany and other European countries will increase again in 2021, but China still has an advantage in the long-term trend.
At present, the big wave of manufacturing transformation and upgrading is re-release of huge potential energy. The continuously accelerating industrial structure upgrading, 5G, industrial Internet, artificial intelligence and other new technologies promote high-quality development, making high-end manufacturing the main force of China's manufacturing. Zhu Hong, a senior statistician at the Department of Industry of the National Bureau of Statistics, said that the profits of industrial enterprises grew steadily and rapidly in the first half of the year. Profits of high-tech and equipment manufacturing industries maintained rapid growth.
Take the export of plastic machinery from mainland China as an example:
Recently, according to statistics from the General Administration of Customs, the total value of imports and exports of 12 key tariff lines for plastic machinery in China in the first half of 2021 was nearly US$2.88 billion, a year-on-year increase of 49%. Among them, imports amounted to 1.107 billion US dollars, a year-on-year increase of 40%, and the growth rate was further higher than the previous five months; exports were 1.773 billion US dollars, a year-on-year increase of 55%, and the growth rate was slightly narrower than the previous five months; the trade surplus was about 666 million US dollars , An increase of 90% year-on-year.
In terms of product breakdown, except for the imports of other blow molding machines under 84773090 and plastic calendering machines under 84774020, which decreased by 25% and 20% year-on-year, the import and export values of other 10 key tariff lines showed rapid growth. The growth rate of exports of injection molding machines and extruders was higher than that of imports. Among them, exports of injection molding machines increased by 70% year-on-year, exports of plastic pelletizers increased by 56% year-on-year, and exports of extrusion blow molding machines increased year-on-year 23%, and the export value of injection blow molding machines increased by 25% year-on-year.
In terms of export distribution, in the first half of 2021, the amount of China's plastic machinery exports to all continents continued to maintain an overall rapid growth. Among them, the year-on-year growth rates of exports to Brazil and Russia are as high as 147% and 85%.
This article was compiled and published by Plastic Machinery Network (www.86pla.com), source of resources: 21st Century Business Herald, General Administration of Customs, Qianzhan Industry Research Institute
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During the "14th Five-Year Plan" period, the high-quality development of the manufacturing industry will become an important theme. The promotion of technological innovation and digital transformation of the traditional manufacturing industry represented by the production of plastics and injection molding products will be the top priority. Guarantee is also the basis for the development of other industrial manufacturing industries. In addition, in order to implement the deployment requirements of "carbon peak" and "carbon neutrality", strengthen overall planning, explore paths and methods, and promote green and low-carbon transformation and industrial structure optimization and upgrading, the following trends will appear in the development of the injection molding industry.
1. The functionalization and greening of raw materials and modified materials
With the continuous implementation of carbon neutrality and carbon peaking, the green production and processing technology of plastics is getting more and more attention, such as green additives, green flame retardants, green plasticizers, etc., are being researched and promoted more and more. . At the same time, the use of bio-based plastics with a wide range of sources, green, low-carbon, easily degradable, and easy to recycle is increasing, and will be widely used in packaging, tableware, household appliances, stationery, maternal and child products, electronic information and other industries. Although the planned production line, production capacity and output of PLA at home and abroad continue to hit new highs, it still cannot match the growth rate of the downstream market, and the supply of raw materials and modified materials has been in short supply for a long time.
Injection grade PLA resin (left) and PLA injection tableware
2. High-end, precise, intelligent, and energy-saving injection molding equipment
In 2020, the import value of injection molding machines continued to decline, and the decline gradually narrowed. From January to December, the growth rate began to be positive. The growth rate of exports began to be positive from November, and the growth rate of exports from January to December increased by 4%. The export trend is better than imports.
In recent years, breakthroughs have been made in key technologies in the industry, and the gap between the large-scale two-platen, all-electric injection molding machine and the developed countries has been narrowing. For example, the R&D and industrialization of green and intelligent large-scale pure two-plate plastic injection molding equipment, breaking the monopoly of Germany and Japan; solid waste polymer material online processing system, reducing energy consumption and improving economic benefits; integration based on terminal application requirements The intelligent production system realizes the intelligent unmanned production line of injection molding. In the future, domestic injection equipment needs to work hard in the following aspects.
(1) For high-end complex applications, injection molding systems with high precision, stability and scalability, such as non-contact automatic molding systems for high cleanliness requirements such as medical applications; engineering plastic precision parts molding systems for 5G applications; Large-scale automatic molding system for automobiles; R&D and industrialization of all-electric injection molding machine basic systems for high-precision requirements such as electronic appliances and mobile communication industries.
(2) Develop an expandable injection molding system that meets the needs of composite material molding, and realizes high-efficiency and high-precision molding processing of composite materials.
(3) Develop special injection molding machines that meet the molding of special engineering plastics, such as PEEK, PI, PPS and other high-performance special engineering plastics, to meet the needs of cutting-edge applications (such as electronic information, aviation).
(4) High-performance injection molding system combined with various advanced injection molding processes, such as high-volume high-speed hot runner preform machine, microcellular foam injection molding machine, customized touch multi-layer composite injection molding machine, thermoplastic fiber reinforced composite Molding machine, screwless ultrasonic plasticizing micro-injection molding machine, one-step injection molding machine with automatic clamping force compensation, intelligent molding integrated manufacturing system (3D copier), etc.
(5) High-precision lens optical injection molding machines with extremely high requirements for molding accuracy and stability are used in imaging monitoring fields such as mobile phones, automobiles, and security.
(6) The TPE joint angle intelligent injection molding machine, which is mainly used in the automotive sealing system, consolidates the leading position of the C-type injection molding machine in the industry.
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Injection molding machine (abbreviated as injection molding machine) is the main molding equipment that uses plastic molding molds to make thermoplastic or thermosetting materials into various shapes of plastic products. The working principle of the injection molding machine is similar to the syringe used for injection. It uses the thrust of the screw (or plunger) to inject the plasticized plastic in the molten state (that is, the viscous fluid state) into the closed mold cavity. The process of obtaining the product after curing and shaping. Injection molding machine is the main molding equipment that uses plastic molding molds to make thermoplastic or thermoset plastics into various shapes of plastic products.
Injection molding is a cyclic process. Each cycle mainly includes: quantitative feeding-melting and plasticizing-pressure injection-mold filling and cooling-mold opening and part removal. After taking out the plastic part, the mold is closed again for the next cycle. Injection molding is a cyclic process. Each cycle mainly includes: quantitative feeding-melt plasticization-pressure injection-mold filling and cooling-mold opening and retrieval, and then close the mold after taking out the plastic part for the next cycle. An injection molding machine is usually composed of an injection system, a clamping system, a power system, an electrical control system, a lubrication system, a heating and cooling system, and a safety monitoring system. Injection molding machine is an important branch of plastic machinery, and it is the plastic machinery product with the largest output, the highest output value and the most export. Plastic machinery refers to the general term for all types of machinery in the plastics processing industry. Plastic molding machines (injection molding machines, blow molding machines, extruders) account for the largest proportion, accounting for more than 80% of the total output value of plastic machinery, and injection molding machines account for plastics 40% of the molding machine. From this calculation, injection molding machines account for approximately 32% of the output value of plastic machinery. Plastic molding equipment is the most used processing machinery in the plastics industry. From a global perspective, the three major categories of plastic machinery are injection molding machines, extruders and blow molding machines. The total output value of plastic machinery accounts for more than 80% of the total output value of plastic machinery. Among them, the output value of injection molding machines accounts for about 40%. The composition of the output value of the machinery industry is roughly the same. The injection molding machine is the largest product in my country's plastic machinery industry with the largest output, the highest output value, and the largest export. The injection molding industry has a wide industry chain. Mold manufacturers, plastic manufacturers, and machinery manufacturers provide injection molding companies with molds, raw materials and equipment required for injection molding. Injection molding companies continue to pass the value chain through injection molding, and ultimately apply to downstream industries such as automobiles, home appliances, 3C, and packaging. From a global perspective, the growth rate of the injection molding machine market is relatively stable. According to statistics from the "Competitive Strategy and Investment Potential Research Report on China's Injection Molding Machine Market 2020-2026" published by CICC International Consulting, the global injection molding machine market is expected to rise steadily from 8.482 billion euros in 2016 to 11.557 billion euros in 2024. , A compound annual growth rate of nearly 3.94%. From a global perspective, the output of plastic molding equipment in the six countries of Germany, Austria, China, Japan, South Korea and Canada accounts for about 80% of the total global output. Manufacturing powerhouses such as Europe and Japan attach great importance to innovation in the field of plastic machinery. More than 45% of the world's plastic machinery patents are owned by European companies, and more than half of the annual export value also comes from Europe. The precision injection molding machines and large injection molding machines produced in European countries represented by Germany have high technical content and high added value, with high profit margins, and almost monopolize the high-end market. Electric injection molding machines produced in Japan account for 30% of the market in North America, and they have obvious advantages in rapid cycle molding and high-precision miniaturized injection molding. my country's plastic machinery industry itself also has obvious cyclical characteristics. On the one hand, the periodicity is the replacement of equipment brought about by the life of the equipment; on the other hand, it is the periodic fluctuations in demand caused by technological upgrad
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How to choose the right injection molding machine
In recent years, with the development of the resin chemical industry, the mold industry, and the machine automatic control component manufacturing industry, the application range of injection molded products has been widely promoted and popularized. As various modified plastics, engineering plastics and composite plastics are used more and more widely, the precision and complexity of plastic products are becoming higher and higher, and it is becoming more and more important to choose the right injection molding machine.
1. Factors affecting the selection of injection molding machine:
The important factors that usually affect the selection of injection molding machines include product weight repeatability, mold opening position, cycle time, etc. Therefore, the following information must be collected or possessed before making a selection:
1. Product: size (length, width, height, wall thickness), net weight and total weight, etc.
2. Material: the ratio of raw materials or granulated materials and other materials and crushed materials.
2. How to choose the model of injection molding machine
After obtaining the above information, you can follow the steps below to select a suitable injection molding machine:
The model and series are determined by the product and plastic. When a customer chooses an injection molding machine, the first step is to determine the structure of the injection molding machine: vertical injection molding machine, angle injection molding machine, or horizontal injection molding machine according to the product's take-out direction and mold structure. There is little difference in the structure of the glue injection machines of the major manufacturers, and the structure difference is mainly in the clamping structure.
Three, the choice of the clamping force of the injection molding machine:
The mold clamping is determined by the design structure of the product mold and the plastic to determine the "clamping force" tonnage. The clamping force is an important parameter of the injection molding machine. When the high-pressure plastic melt fills the cavity, a large expansion force is generated in the cavity, which causes the mold to expand along the parting surface. If mold expansion is not allowed, the injection molding machine must provide a force greater than this expansion force to lock the mold, otherwise it will cause overflow and runout. This force is the clamping force.
If the clamping force is too large, it will not only increase the customer’s purchase cost, but also increase the wear of the mold and the difficulty of venting in the cavity, causing the product to burn or lack of material. More importantly, the machine will cause the machine to be stressed. Increased wear and tear shortens the life of the clamping mechanism and hydraulic system, and also wastes energy. Therefore, when calculating the clamping force, the customer’s product projection area and the ratio of the process length to the wall thickness, material, and mold cavity must be used to calculate the clamping force. Pressure is used to calculate the more accurate clamping force. The clamping force is the same as the injection volume, which reflects the ability of the machine to process the product to a certain extent, and is often used as the main parameter to indicate the size of the machine.
Four, select the appropriate injection molding machine according to the mold
1. Connecting pillars (also called guide pillars): The inner spacing determines the width of the mold's overall dimensions. The larger the inner distance of the guide pillars can accommodate larger molds, and the smaller the inner distance of the guide pillars can accommodate smaller molds. The minimum contact area between the mold and the template cannot be less than 60%, and the maximum effective area of the mold cannot exceed the area of the spacing between the connecting columns, otherwise the engine template will be unevenly stressed, the product will be partially flashed, and the template will be easy to crack.
2. Mold size: The template is a ductile iron plate supported on the back of the mold, and the mold should not exceed the inner distance of the template. To prevent the mold from bending during injection. If the mold is too small, it will generate excessive bending stress on the template, and even break the template. When injecting thin-walled products, the injection pressure is high, the injection speed is fast, and the cycle time is short. The template should be thickened, and the reinforcing ribs should be strengthened to increase the rigidity.
3. Modulus: The smallest to largest mold that the injection molding machine can accommodate. The difference between them is the modulus of the injection molding machine. The available mold thickness should be larger than the minimum modulus, so that the injection molding machine can open and lock the mold. Otherwise, add special engineering (the effective thread of t
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The injection molding process of silicone products affects product accuracy:
In the production of some important injection molded parts that require more precise dimensions, the allowable range of fl
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