Automatic bottle blowing machine manufacturers 'group together' to seize the international market

Blow molding is a common method of manufacturing hollow thermoplastic products, the main products are tube films and hollow containers. The blow molding machine can plasticize the preformed products by heating, and then enter the mold for blow molding. This method is mainly used for the production of high-speed and high-volume PET bottles and BOPP bottles, that is, a two-step process; blow molding can also be combined with The injection molding process is combined into an injection-stretch-blow integrated machine, which is also a common method for producing containers in PET; the blow molding process can also be combined with the extrusion process, and the extrusion blow molding equipment has a wider range of applications and can produce more products. To enrich, the products include multi-layer composite films and various polyolefin hollow containers, which are widely used in the food, pharmaceutical and cosmetic industries. Hollow container forming machine One-step and two-step blow molding process, mainly used for PET and BOPP hollow container forming. Both have their own characteristics and are widely used. The two-step method is more suitable for the production mode of bottle factories that focus on the production of preforms and disperse blowing of bottles; while the one-step method is more suitable for the on-line production of beverage companies. Therefore, at present, the main users of China's two-step equipment are professional PET bottle manufacturers such as Zijiang and Zhongfu, while the one-step equipment is mainly beverage manufacturers such as Master Kong and Wahaha. The PET bottle blowing machine is divided into two types: rotary type and linear type according to the conveying method of the preform during heating. The rotary blow molding machine has high capacity, high speed, complex design and high price. The typical rotary blow molding machine is the SBO series from SIDEL in France. Its SBO24 blow molding machine has an output of more than 20,000 bottles per hour. At present, Tech-Long in China has also successfully developed a rotary blow molding machine with a production speed of up to 20,000 bottles per hour. More than 8,000 bottles per hour; the typical representatives of linear blow molding machines are ASB and AOKI in Japan. Generally speaking, this kind of mechanical design is relatively simple, but the output will form a bottleneck, and it is difficult to exceed 6,000 bottles per hour. The BOPP bottle blowing machine developed by Dongguan Hongjia Machinery Factory of Hong Kong Huanbao Group also adopts a linear design. Temperature control is directly related to plasticization uniformity and is the key to the success of blow molding products. The design and precision of the mold and hot runner also determine the quality of the product. At present, China's injection stretch blowing equipment for PET bottle production is basically the world of imported products, especially in the production of high-speed and large-volume products, domestic equipment is still unable to compete. It is worth mentioning that there are very few manufacturers that can produce large-capacity PET hot-fill bottle blowing machines. It seems that only ASB's multiple blowing process has achieved satisfactory results. With the rise of the cold aseptic filling process, a new round of competition for the bottle blowing machine market will start again. At present, SIPA's one-step blow molding machine has established a firm foothold in Beijing Huiyuan Juice Factory, but it does not mean that there is no chance for the two-step blow molding machine. The extrusion blow hollow container production equipment is more adaptable to materials, and can produce containers of various materials such as PE, PS, PVC, PC, etc., and the application fields of the products are also wider. 3/4 of blow molding products on the market are manufactured by extrusion blow molding. The extrusion blowing method can produce eye drop bottles of several milliliters, and can also process trays or ton barrels of more than 1000L. At present, China's extrusion blow hollow container production equipment can fully meet the needs. For example, Yaqi's extrusion blow molding equipment has formed a series of equipment, which can produce blow molding containers of various specifications below 200L, and has developed in-mold labeling extrusion blow molding machines, which are widely used in cosmetics and lubricants. Another example is the large-volume blow molding equipment developed by Shantou Jinming Plastic Equipment Co., Ltd. and Shaanxi Qinchuan, which has also occupied most of the domestic market. However, the current extrusion blowing equipment developed in China is not fully functional, especially some equipment with multiple composite functions cannot be produced, such as bottle making widely used in liquid medicine packaging.——filling——Three-in-one sealing device. Multilayer composite film production equipment Plastic film produced by extrusion blowing method is another major type of product produced by blow molding process. At present, about 40% of plastic packaging films in developed countries are multi-layer co-extruded films produced by extrusion blowing, and the proportion in China is slightly lower. In the past, the production of composite films in China mostly used dry or wet composite processes of single-layer films, but the products were gradually replaced by multi-layer co-extrusion films due to unstable quality, poor hygiene and high cost of using adhesives. The multi-layer co-extrusion compounding process is to use multiple extruders to extrude the material through a special die head in the molten state to form a new type of functional film. The composite film can save about 30% of the production cost compared with other composite processes. This film can be configured with different components according to the user's requirements to achieve different barrier requirements and cost requirements. Before the 1990s, China mostly used rotary heads to produce 2 to 3-layer co-extruded films, but with the development, 3-layer packaging films gradually gave way to 5-layer or even 7-layer films. Accompanying this process and catalyzing this process is the development of domestic multi-layer composite blown film equipment.
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