Dalian blown film unit: the core equipment of the plastic packaging industry

In the modern plastic packaging industry, Dalian blown film unit plays an indispensable role as an important production equipment. With the increasing global demand for environmentally friendly materials, the technology of blown film units continues to develop and their applications are becoming more widespread. From food packaging to daily necessities, from agricultural film to industrial film, the production capacity and flexibility of blown film units make them one of the main choices for plastic product production.

1、 Working principle of blown film unit

The basic working principle of the blown film unit is to form a thin film by heating and extruding plastic particles. The process mainly includes several steps:

1. Heating and extrusion of plastic particles: The screw of the blown film unit sends the plastic particles into the heating cylinder. Under constant temperature setting, plastic particles are heated to a molten state. At this point, the molten plastic is extruded through the rotation of the screw.

2. Formation of bubbles: The extruded molten plastic forms a thin film through a mold. During this process, the internal pressure of the mold blows the film into bubbles. The formation of bubbles requires precise control to ensure uniform thickness of the film.

3. Cooling: Bubbles are cooled during their ascent, and the plastic begins to solidify, forming a thin film structure. The use of cooling water rings is crucial to ensure the quality of the membrane.

4. Roll up and cutting: The formed film is rolled up onto a reel for easy subsequent cutting and packaging.

2、 The main structural components of the blown film unit

The structure of the blown film unit is relatively complex, mainly composed of the following parts:

-Extruder: responsible for extruding and heating plastic particles, it is the core part of the entire unit. Modern extruders often adopt high-efficiency screw designs to improve the uniformity and yield of plastic melting.

-Mold: The type and design of the mold directly affect the quality and characteristics of the film. Different molds are required for films with different purposes, such as flat head molds, circular molds, etc.

-Blowing device: responsible for controlling the formation and expansion of bubbles, ensuring uniform thickness of the membrane.

-Cooling system: Water ring cooling is usually used to effectively reduce the temperature of the film, ensuring its formation and stability.

-Roll up device: used to roll up the produced film, and the accuracy of the equipment is also an important factor affecting the quality of the final film.

3、 Market situation analysis

In recent years, the global plastic packaging industry has grown rapidly, driving the development of the blown film machine market. According to market research, it is expected that the market demand for blown film units will continue to rise in the coming years, mainly driven by the following factors:

1. Increased awareness of environmental protection: Due to the increasingly severe problem of plastic pollution, many countries have begun to restrict the use of disposable plastics and promote the research and application of biodegradable plastic films. This has prompted manufacturers of blown film units to increase their investment in research and development of new technologies.

2. Growing demand for food packaging: With the acceleration of the pace of life, the demand for convenient food packaging has surged, providing a broad market for blown film units.

3. Application of new materials: More and more new plastics, such as PLA, PBAT and other bio based materials, are entering the market, promoting the innovation of blown film technology. Manufacturers need to update their equipment to adapt to the processing of new materials.

4、 Future Development Trends

Driven by market demand, the technological innovation and development direction of blown film units mainly include the following aspects:

1. Application of energy-saving and environmental protection technologies: With the increasing sensitivity of enterprises to production costs, energy-saving blown film units are receiving more and more attention. By optimizing the design and using high-performance drive systems, energy consumption can be significantly reduced and production efficiency can be improved.

2. Intelligent production: With the development of the Internet of Things and intelligent manufacturing technology, intelligent blown film units will become increasingly popular. Not only can automation control be achieved, but also the flexibility and response speed of the production process can be improved through big data analysis.

3. Integration of production lines: Future blown film units may be highly integrated with subsequent processing equipment to form an "integrated" production solution, improve production efficiency, and shorten delivery time.

4. Technological research and development of biodegradable plastic film: With the increasingly strict environmental regulations, the development of biodegradable film will become an important direction for the development of blown film units. Many companies are exploring new material formulas and blown film processes to meet the market's demand for environmentally friendly packaging.

5、 Summary

The blown film unit plays an important role in the plastic packaging industry, and its fine craftsmanship and innovative technology continue to drive the development of the industry. Against the backdrop of high environmental awareness and expanding market demand, the future of blown film units is worth looking forward to. Manufacturers need to keep up with market changes, continuously invest in research and development, and enhance the technological level and competitiveness of their products to adapt to this rapidly developing industry.