Plastic Machinery Market Analysis

The plastics machinery industry provides processing equipment for the plastics industry. In recent years, China's plastics machinery industry has developed rapidly. Its development speed and major economic indicators have been among the top 194 industries in the machinery industry. The annual manufacturing capacity of plastics machinery is about 200,000 sets (sets), with a complete range of products, ranking first in the world.
At present, there are nearly 400 major plastics machinery manufacturing enterprises in China, about 200 large and medium-sized enterprises, and 10 large-scale backbone enterprises. Emerging plastics machinery companies have mastered high-tech, have a series of characteristics such as technological innovation, institutional innovation, and management innovation, which have attracted the attention of domestic and foreign counterparts.
China's plastics machinery enterprises are mainly located in the southeastern coastal areas and the Pearl River Delta. Among them, the Ningbo area has the most rapid development trend. It has now become China's largest injection molding machine production base, and its annual production accounts for more than 1/2 of the total annual output of domestic injection molding machines, accounting for the world's injection molding. 1/3 of the machine.
The upgrading of the plastic mold industry, technological innovation has also shown unprecedented gratifying changes. Most companies in Shantou, Guangdong Province have fully introduced the latest computer automation mold processing technology from Germany, France, Italy and Taiwan Province of China, which greatly improved the mold technology performance and quality grade.
Although China's plastics machinery has developed rapidly and produced more varieties, it can basically supply the general technical equipment required for domestic plastic raw material processing and plastic product processing and molding, and individual products have also entered the world's forefront, but with industrialized countries such as Germany, Compared with Japan and Italy, there are still some gaps in China's plastics machinery, mainly in terms of fewer varieties, high energy consumption, low control levels, and unstable performance.
At present, China's plastics machinery products are mainly concentrated on general-purpose small and medium-sized equipment, and its technical content is low. In the 1980s and 1990s, the supply of low-grade products exceeded demand, the machinery manufacturing capacity was surplus, and the efficiency of enterprises declined. Some varieties, especially ultra-fine large-scale high-end products, are still blank and still need to be imported. According to statistics from 2001, China's imports of plastic machinery use foreign exchange of 1.12 billion U.S. dollars, while exports of plastic machinery earned only 130 million U.S. dollars, and imports far exceed exports.
After China joined the World Economic and Trade Organization (WTO), foreign machinery manufacturing accelerated its transfer to China. Some well-known plastics machinery companies in the world, such as German Demark, Krupp, Badenfele, and Sumitomo Heavy Industries, Ltd. "In China, some have further established technical centers. The entry of foreign plastics machinery manufacturers has brought vitality to China's plastics machinery industry. At the same time, it has also made China's plastics machinery manufacturing enterprises full of opportunities and challenges.
1 Development status and level of plastic machinery 1.1 Open mill â–¡
The double-roller mill, also known as an open-type refiner, is the most basic equipment in plastic machinery. It is mainly used for the mixing of plastics, for the feeding of calenders and for the use with the mixing machine.
At present, the production of open mills in major industrial countries in the world has long formed a series of specifications, sizes, and shapes. Since the 1990s, China has improved the open mills mainly to increase the degree of mechanization, increase safety operations, improve working conditions and reduce floor space.
At present, some major manufacturers in China have made many improvements to the open-ing mechanism. For example, the deceleration system is installed in the left and right brackets. It is installed under the receiving tray. The material-feeding device is set on the rack, and the hydraulic pressure adjustment distance is used. Hydraulic safety devices, minimize the equipment's own weight and floor space, and strive to improve the equipment's service life. At present, domestic open mills have also formed a complete series, with complete specifications and specifications, which can fully meet the requirements of users in all aspects. For example, Dalian Bingshan Rubber & Plastic Co., Ltd. took the lead in accomplishing the serialization and development of the open mill. The rollers and bearings of the open mill are all double-row spherical roller bearings. All the transmission gears are concentrated in a closed box. Compact, high transmission efficiency and good lubrication conditions. Roller pitch can be either monotonous or double adjustable at the same time, making it easy to operate. In order to reduce the vibration of the machine, the body and the speed reducer are installed separately, and a nylon rod universal joint is used. This machine has reached the international advanced level and is favored by domestic and foreign users.
1.2 Mixer Mixer, also known as closed type, is mainly used for the mixing of plastics and the mixing of other materials. For the above applications, the internal mixer can completely replace the open mill, and the production efficiency and automation level are greatly improved, and the working conditions can be improved. Currently, the production of internal mixers in the world's major industrial countries has formed a series. There are basically four types:
(1) F-Series internal mixers represented by Benbury-type manufactured by American Farrell-Birmingham Company;
(2) The GK series mixers represented by the products of Werner Preveller GmbH in Germany;
(3) The K series internal mixer represented by the products of Francis Shaw of the United Kingdom;
(4) MS series pressure mixers represented by products manufactured by Japan's Moriyama Seisakusho.
Since the 1990s, these four types of internal mixers have been developed toward the automation of rapid, high-pressure, large-capacity, and feeding and operating procedures, and are controlled by microcomputers. In general, the basic structure of the first three series of mixers is similar. The main difference is the configuration of the rotor and the structure of the mixing chamber. The main structure of the 4th MS series has great changes compared with the first 3 series. The above-mentioned several kinds of internal mixers, in terms of chronological order, have both reference and inheritance for the former, as well as improvements and innovations. In the competition in the international market, they have mutual absorption, self-improvement and development, and each has its own characteristics.
The internal mixers produced in China basically belong to the F series, GK series and MS series. The technical parameters and main performance are the same as those of the above three series, and the appearance is also very similar, but the specifications are not complete and a complete series has not yet been formed.
Internationally, small and medium-sized plastics plants use pressurized kneaders. It does not have a bolt under the roof, and uses a miter room to flip the material. It has a small footprint and can be installed on the ground, saving engineering costs. A full range of pressurized kneading machines has been formed in Japan. The smallest mixing chamber has a total volume of 1L, the kneading chamber has a total volume of 3L, and the largest mixing chamber has a total volume of 500L. There are 27 specifications.
1.3 Injection Molding Machine Injection molding machine is one of the main varieties of plastic machinery, accounting for 38% of the total output value of plastic machinery, and 1/3 of plastic products are produced by injection molding machines.
At present, there are many manufacturers of injection molding machines in China. According to incomplete statistics, there are more than 60 manufacturers. Injection molding machine structure has two types of vertical and horizontal. According to the production of products can be divided into ordinary and precision injection molding machine. A shot volume of 45-51000g; clamping force 200-36000kN; processing materials are thermosetting plastics, thermoplastics and rubber three. Thermoplastics include polystyrene, polyethylene, polypropylene, nylon, polyurethane, polycarbonate, plexiglass, polysulfone and (acrylonitrile/butadiene/styrene) copolymer (ABS). From the processed products, there are monochrome and two-color general and precision plastic products. The main manufacturers of the above products have their own series, each with its own characteristics. For example, each type of CJ series injection molding machine produced by Guangdong Zhende Plastic Machinery Factory Co., Ltd. has two forms of numerical control and computer control. Another example is the HTF80X-HFT3600X series injection molding machine produced by Ningbo Haitian Machinery Co., Ltd. in Zhejiang Province, which can be used to produce a variety of high-precision thermal plastic products. The machine uses linear motion sensors to control injection, mold clamping and ejection, and uses multiple CPUs. Electronic control system, large format color LED display, full computer automatic control.
Ordinary horizontal injection molding machine is still the dominant direction of injection molding machine development, its basic structure has almost no major changes, in addition to continue to improve its level of control and automation, reduce energy consumption, the manufacturer is in accordance with the changes in the market is the direction of the development of the portfolio series , Such as the same type of injection molding machine configuration of large, medium and small three injection devices, combined into a standard type and combination type, increased flexibility, expand the scope of use and improve economic efficiency. In recent years, the injection molding machine manufacturers in industrialized countries all over the world have continuously improved the functions, quality, supporting facilities of auxiliary equipment, and automation level of ordinary injection molding machines. At the same time, we will vigorously develop and develop large injection molding machines, special injection molding machines, reaction injection molding machines, and precision injection molding machines to meet the needs of producing plastic alloys, magnetic plastics, and plastic products with inserts.
Injection molding machine is currently one of the fastest growing plastic machinery in China, and the gap between the level of industrial machinery and developed countries is relatively small. But mainly refers to the ordinary type injection molding machine, in the large-scale, all kinds of special, special, precision injection molding machine most of the varieties, some products are still blank, which is the main gap with the industrialized countries.
1.4 Extruder and auxiliary machine (production line)
Extruder is also one of the main varieties of plastic machinery, accounting for 31% of the total output value of plastic machinery. Plastic products processed with extruder account for about 1/3 of the total.
Single-screw extruders occupies an important position as plastic granulation machinery or molding processing machinery. In recent years, the single-screw extruder has made great progress. At present, the large pelletizing single-screw extruders produced in Germany have a screw diameter of 700 mm and a production volume of 36 t/h.
The main sign of the development of single-screw extruders is the development of its key part, the screw. In recent years, a large number of theoretical and experimental researches on screw have been carried out. Up to now, there have been nearly 100 types of screws, and there are commonly used separation type, shear type, barrier type, shunt type, and wavy type.
From the standpoint of single-screw development, although single-screw extruders have been relatively complete in recent years, with the continuous development of polymer materials and plastic products, more innovative new types of screws and special single-screw extruders will emerge. In general, single-screw extruders are moving toward high speed, high efficiency, and specialization.
Twin-screw extruder has good feeding characteristics and is suitable for powder processing. It has better mixing, venting, reaction and self-cleaning functions than single-screw extruder. It is characterized by poor thermal stability of plastics and blends. When it is expected, it shows its superiority. In recent years, foreign twin-screw extruders have made great progress. Various types of twin-screw extruders have been serialized and commercialized, and there are also many manufacturers. They are roughly classified as follows:
(1) According to the relative positions of two axes, there are parallel and conical points;
(2) According to the two screw engagement procedures, there is a meshing type and a non-meshing type;
(3) According to the direction of rotation of the two screws, there are points in the same direction and in the opposite direction, in the opposite direction there are points inward and outward; (4) according to the screw rotation speed, there are high speed and low speed;
(5) According to the structure of the screw and the barrel, there are integral and combination points.
On the basis of twin-screw extruders, some manufacturers have developed multi-screw extruders such as planetary extruders in order to make it easier to process poorly thermally stable blends.
The product series of twin-screw extruders in China is incomplete and has fewer specifications. Many plastics companies in China still use imported twin-screw extruders. In the early 1990s, South China University of Technology invented the electromagnetic dynamic plasticizing extruder. New theories and concepts have attracted attention.
In recent years, great progress has been made in the completeness of China's plastics machinery. For example, the plastic granulation unit has reached a fairly complete level from the host, feed metering, head, pelletizing and recycling systems, to heating, cooling, electrical control, and temperature control systems. Thin-walled pipe, thick-walled pipe, coiled pipe, corrugated pipe (single and double-walled), composite pipe and other pipe unit specifications are becoming more and more complete, product quality and quality continue to increase. In order to meet the needs of multi-layer composite membranes, composite co-extrusion technology and its forming units (film blowing units) have also developed rapidly. For example, the hollow wall winding pipe production line recently developed by Qingdao Deyili Group can produce straight pipe diameters up to 300mm. Another example is Guangdong Jinming Plastics