I. Foreword
With the development of China's petrochemical industry, automobile industry, packaging industry, construction industry, etc., the development of the plastics industry is growing rapidly, and the plastics industry has become a sunrise industry in China. In recent years, the annual output of plastic products increased by more than 10%, it is expected that by 2005, China's output of plastics will reach 25 million tons, the plastics industry driven by the annual growth of plastics machinery for more than 30%. According to incomplete statistics, in 2002, China's plastics machinery industrial output value of about 10 billion yuan.
Plastic machinery in the production and sales of the largest, most widely used varieties of injection molding machine, extruder production line, hollow blow molding machine, the three major products accounted for the domestic plastics machinery industrial output value, the number of units and the weight of more than 85% of the various types of hollow blow molding equipment in 2002, the market share of about 500 million yuan.
Two, the domestic hollow products processing methods and applications
Hollow products molding processing methods are blow molding process and rotational molding process. At present, the domestic hollow products are mainly blow molding.
By the way the parison molding, blow molding can be divided into extrusion blow molding, injection stretch blow molding, injection blow molding, *** extrusion blow molding and other four.
1. Extrusion blow molding
Extrusion blow molding process is mainly raw materials through the extruder plasticization, transported to the storage head (or continuous head), through the head extrusion billet, the billet is placed in the mold blown into products, and then cooled, remove the products.
Currently, the largest amount of domestic hollow products 5L ~ 1000L is extrusion blow molding process. The main raw materials used are HDPE, PP, ABS, PC and so on. The main products are all kinds of chemical products packaging barrels, automobile fuel tanks, automobile ventilation pipe fittings, desktop panels and other industrial products. The most typical representative product of extrusion molding process is 200L double L ring drum. In extrusion molding, the most complicated process and technical difficulty is the molding of double-L ring drum.
Domestic extrusion molding equipment (referred to as hollow machine) is mainly dominated by domestic equipment. 20L ~ 1000L equipment, Shaanxi Qinchuan Machinery Development Co. Ltd. (Qinchuan Development) has a market share of more than 70% in 20L to 1000L equipment, and Qinchuan Development has a market share of more than 80% in the production of 200L double-L ring drums. 2002, the domestic production of 200L double-L ring drums exceeded 3 million, consuming 300,000 tons of plastic. Qinchuan development is the earliest domestic development of extrusion hollow molding equipment manufacturers, is the production of plastics machinery, gear grinding machines, machining centers and other equipment, heavy industry enterprises, with strong R & D strength and machinery manufacturing capacity, in the hollow blow molding process has a wealth of experience.
Extrusion molding products manufacturers are mainly located in East China (Jiangsu, Zhejiang, Shanghai, Lu), South China, North China and other places. The main several manufacturers are: Shanghai Pudong Gonglu Plastic Container Co., Ltd, Shanghai Fanshun Industrial Company, Chunxin Plastic Factory in Wujiang City, Jiangsu Province, Changzhou Yueyang Plastic Container Co., Ltd, the thirteenth Dalian Plastic Factory, Guangdong Nanhai City, Dongxing Can Co.
2. Injection stretch blow molding
Injection stretch blow molding for biaxial stretch oriented blow molding, is a polymer in the viscoelastic state through mechanical methods of axial stretching of bottle blanks, radial compressed air blowing bottle blanks molded containers, this molding method is characterized by the axial and radial with the same stretch ratio, can improve the mechanical properties of the blow molded containers, bleed resistance, transparency, reduce the product wall thickness, which is the same as the axial and radial with the same ratio, can improve the mechanical properties of blow molded containers, permeation resistance, transparency, reduce the wall thickness of the products. Reduce the wall thickness of the product, which is the thinnest blow molding products wall thickness of a process.
Injection stretch blow molding is mainly used for molding 0.2-20L, the shape of the round or oval containers, such as beverage bottles, pure water bottles, edible oil bottles. This kind of product is used in the market in large quantities, so it requires high production efficiency and good reliability of the equipment. The raw materials used in the injection, pulling and blowing process are mainly PET, PVC, PP, PEN and so on.
The injection and blowing process can be divided into automatic one-step method and automatic two-step method.
At present, the domestic market capacity of PET bottles produced by injection pull blowing high-speed process is huge, and the annual increase is also very large, PET bottle production equipment is mainly imported, the domestic annual introduction of foreign PET equipment for the introduction of at least 1.5 billion yuan of capital, the production of PET heat-resistant bottles of equipment are all imported equipment, in the face of such a huge market, the domestic blowing equipment manufacturers almost nothing to do! In the face of such a huge market, the domestic blowing equipment manufacturers have almost nothing to do, for the huge market potential of PET beer bottles is even more powerless, which is worth every hollow equipment manufacturers to think y.
Domestic enterprises specializing in the production of PET bottles are: Zhuhai Zhongfu, Shanghai Zijiang, Wahaha, Huiyuan, Master Kong, Nongfushanquan, etc., and their equipment are imported.
3. Injection blow molding
Injection blow molding process has three stations, each station for the injection molding machine injection molding preforms, the second station is a preform in the blow mold blow molding products, the third station for the top out of the product, similar to the extrusion blow molding process, injection blow molding radial blowing ratio is large, axial blowing ratio is small.
Injection blow molding is suitable for all kinds of thermoplastic raw materials such as: PE, PP, PS, PVC, PC, etc., can be molded into a variety of shapes of containers, the products can replace the glass bottles, mainly used for packaging of pharmaceuticals, cosmetics, food, daily necessities, pesticides and so on.
Injection blow molding process is currently using the main equipment for the automatic injection blowing hollow molding machine, the domestic production of this equipment for the main manufacturers of Shantou Jinming Plastic Equipment Company Limited, Jiangsu Vinda Company.
4. Multilayer *** extrusion hollow blow molding
Multilayer *** extrusion blow molding in the field of blown film is widely used in developed countries, more than 80% of the packaging film using multi-layer *** extrusion film. The main purpose of multilayer *** extrusion blow molding is to improve the containers of CO2, O2 or gasoline barrier. The process is through the composite head of several different raw materials extrusion blowing into hollow products, the main products are: high-grade automotive fuel tanks, toxic pesticide packaging, etc., the number of layers ranging from 2 to 6 layers.
Multi-layer blow molding is a high-end hollow blow molding technology. At present, the domestic Shaanxi Qinchuan Machinery Development Co., Ltd. has successfully developed for the production of six layers of high-grade automobile fuel tank hollow machine, products, the maximum volume of 500L, there have been three delivered to the user. This equipment to fill the gaps in the domestic, comprehensive technical indicators to meet or even exceed the German similar equipment.
Domestic hollow products processing enterprise layout:
Guangdong, Shandong, Jiangsu, Zhejiang, Shanghai, five provinces and cities of the plastic processing enterprises, both in terms of quantity and production in the country's top. Five provinces and cities of the plastic processing enterprises manufacturers account for about 48% of the country's total number of plastic products production accounted for the country's total volume of 1/3 to 1/2.
According to the National Plastics Processing Information Center in early 2000, the main distribution of domestic plastic containers processed in East China, South China and other economically developed provinces.
The National Plastics Industry "Tenth Five-Year Plan and 2005 Rules" determined that China's output of plastic products in 2000 to 2005 is expected to have a 10% growth rate. According to market forecasts, by 2005 the output of plastic products for packaging is 5.5 million tons, accounting for 22% of the total output.
Three, the development of domestic hollow molding equipment
At present, the domestic production of hollow molding equipment, mainly more than 10 enterprises, the technical level varies greatly, with research and development, manufacturing and technical services, not many enterprises with comprehensive strength. Some hollow equipment manufacturers have weak technical force, can not penetrate the plastic hollow molding process, the production of equipment and molds can not meet the user requirements and raw material molding process requirements, the production of unqualified products or can not stably produce qualified products.
Shanxi Qinchuan Machinery Development Co., Ltd. is the strongest domestic R & D strength, mechanical manufacturing capacity of the strongest hollow machine manufacturers. Qinchuan Development began to develop hollow machines in the early 1980s, and has become the largest hollow machine manufacturing base in China. Qinchuan Development's Qinchuan Development Technology Research Institute is a state-level technology center with 15 research institutes. The institute has established a postdoctoral mobile station and a national CIMS center. There are two doctors and three professorial senior engineers among more than 200 researchers. The company's machinery manufacturing level is in the leading position in the machinery industry, with the "three fine" advantages of precision machining, precision measurement and precision assembly, and has a number of patented technologies in plastic machinery.
Qin Chuan development of plastic machinery after more than 20 years of development, the product has developed to the fifth generation of products. Fifth-generation products in the mechanical, electrical and hydraulic aspects of the hollow molding process research and mold research in the domestic leading position, to reach or close to the international level at the same time. The fifth generation products adopt the patented extruder technology and optimized head technology in mechanical aspect; adopt the high-function PLC of famous foreign brands in electrical aspect; and adopt the products of famous foreign brands in hydraulic and pneumatic components. Qinchuan development of automation control and molding process principles of research in the domestic leading position.
The main new products developed by Qinchuan Development in recent years:
1. SCJ230 hollow machine
SCJ230 hollow machine is mainly used for the production of 200L double-L ring drums, which passed the national appraisal in 1995 and was awarded the prize of scientific and technological progress by the Ministry of Machinery in 1996. It has been sold to the market nearly 40 sets, blocking imports. the improved replacement product SCJ230A introduced to the market in 2003 has higher reliability, higher production efficiency, and the quality of the products produced can meet the requirements of all kinds of hazardous goods packaging, with a higher performance-price ratio.
2. SCJC500×6 Multi-layer Hollow Machine
With the development of automobile industry technology and the continuous improvement of environmental protection and safety requirements in various countries, the countries have higher and higher requirements for the impermeability of plastic fuel tanks. Qinchuan development aiming at the domestic high-grade automobile fuel tank development point, the first in China to develop a six-layer plastic fuel tank production equipment SCJC500 × 6 multi-layer hollow machine, to fill the gaps in the country, blocking imports, with a very excellent performance-price ratio. Produced fuel tanks to meet European and Japanese standards for Mazda and Chery and other models supporting.
Plastic fuel tanks have the following advantages compared with metal fuel tanks:
(1) Plastic fuel tanks with the same specifications are 40 to 500% lighter than metal fuel tanks;
(2) Plastic fuel tanks have a large degree of freedom of shape, which can maximize the use of effective space in the car, thus greatly improving the fuel storage capacity of the automobile fuel tank.
(3) The development cycle of plastic fuel tanks is shorter than that of metal fuel tanks, and the cost is low, which facilitates the design and manufacture of automobiles and retrofitting.
(4) plastic fuel tank safety and reliability, impact resistance, corrosion resistance, non-explosive, is incomparable to the metal fuel tank.
3. SCJ70AT hollow machine
Specialized for the production of ventilation ducts, single-layer fuel tanks, water tanks, etc. on cars, specialization and modular design.
4. SCJ1000 hollow machine
For the production of 1000L IBC barrels, 1000 × 1200mm trays, desktop boards and other large products, its production efficiency is much higher than similar equipment in China, close to the efficiency of German equipment.
5. SCJ30×2 double-station hollow machine
Mainly used for the production of 15-30L chemical drums, used for phosphoric acid, hydrofluoric acid and other chemical products packaging. The production efficiency is 50% to 100% higher than single station, and two different products can be produced in two stations at the same time.
Four, the domestic development trend of hollow products
With the automotive industry, packaging industry and the rapid development of the industry as a whole, plastic hollow products to multi-species, diversification, specialization, large-scale development, products have penetrated into the automotive, chemical, food, logistics, agriculture, fisheries, stadiums, military and many other fields. Hollow products have the following main development trends:
1. Application of the automotive industry
According to China's machinery industry, "Tenth Five-Year Plan" plan and 2010 planning, to 2005 and 2010, China's automobile production will reach 3 million and 4.6 million respectively. Due to the improvement of technology, China's car with the proportion of plastic will gradually increase. By 2005, China's use of plastic parts of cars will basically reach 90kg / vehicle (developed countries are currently the amount of automotive plastic parts for 100kg / vehicle), it is expected that all types of cars on the total demand for plastics for 350,000 tons in 2010 to reach 417,000 tons.
Automotive plastics, PE accounted for about 7%, the main use is the use of blow molding process for the production of automotive fuel tanks, ventilation pipes, deflectors and water tanks and other types of tanks.
2. Logistics trays
Trays are indispensable consumables in the modern logistics industry in the storage and transportation process. At present, China's domestic trawl flow of about 80 million per year, of which 20 million trawl with port exports, trawl material to wood-based, paper, plastic, metal, wood-plastic and other materials, the development of the fastest rate of development of plastic. These trays, to hollow blow molding trays strength, life best. At present, there are only three domestic hollow trays production line, annual output of about 250,000 only. It can be seen, hollow blow molding trays have great market potential.
3. IBC drums
In recent years, IBC drums in foreign countries is growing rapidly. The European market annual growth of about 8 ~ 10%, the United States IBC drums growing rapidly, up to 20% or so. IBC drums with more than 30% savings in transportation space, low transportation costs, easy to lift and other advantages, the past few years in the domestic development is also very rapid. The main competition for this product is the market of 10L～20L chemical drums.
4. Large industrial parts
Domestic hollow desktop panels, medical bed panels, military floatation tanks, stadium seats, etc. in East China and South China's rapid development of the market, the hollow products to open up new areas.
5. Plastic beer bottles
Glass beer bottles have good barrier properties, but fragile, explosive, easy to break. Germany Sidel, Japan ASB company, Japan Aoki solid company developed PET or PEN beer bottles have solved the problem of barrier and heat resistance. In the domestic manufacturers have begun production, which will be a huge market.
6. Chemical drums still have a stable market
With the development of the chemical industry, 10L ~ 20L chemical drums packaging market is still 10% to 20% per year of steady growth.
The above is collected and organized by Zhongda Consulting
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