In modern manufacturing, Dalian blown film unit has become one of the important equipment for plastic product production with its efficient production capacity and intelligent operating system. The blown film unit is widely used in packaging, agriculture, medical and other fields due to its excellent performance and stable production process.

Basic working principle of blown film unit

The core working principle of the blown film unit is to heat and melt plastic particles to form a thin film, and blow it into the desired film shape through air pressure. The specific steps can be divided into the following steps:

1. Raw material feeding and preheating: Plastic particles such as polyethylene (PE) and polypropylene (PP) are fed into the melt extruder through the feeding system. Here, plastic particles are plasticized at high temperatures and become a molten state with good fluidity.

2. Extrusion and molding: Molten plastic is compressed and stirred by a screw and evenly fed into the mold head. In the mold, molten plastic is extruded and forms a slender tubular film.

3. Blowing and cooling: During the production process, compressed air will pass through the inside of the mold head, forming bubbles in the film tube. The size of bubbles is directly related to the thickness of the membrane. After blown film, the film is rapidly cooled by a cooling device to maintain its shape and properties.

4. Roll up and cutting: The cooled film will be rolled up into a roll, which can then be further cut and divided for easy processing and use.

The main components of the blown film unit

The blown film unit usually consists of the following main parts:

-Extruder: This is the core part of the blown film unit, consisting of a heater, screw, and die head. An efficient extruder can ensure uniform plasticization and stable extrusion of plastics.

-Cooling device: Usually, water or air cooling is used to quickly reduce the temperature of the film, ensuring the size stability of the film.

-Winding mechanism: driven by a motor, it winds the finished film into a roll. This section has strict requirements for the tension and winding density of the coil material.

-Control system: Modern blown film units are often equipped with advanced PLC control systems to achieve intelligent management, which can monitor various parameters in the production process in real time, improve production efficiency and product quality.

Market application of blown film unit

The products of blown film units are widely used, covering multiple industry fields. Here are several major market applications:

-Packaging industry: Film is an ideal packaging material widely used for packaging food, daily necessities, electronic products, and more. The film produced by the blown film unit has excellent transparency and toughness, which can effectively protect the product and extend its shelf life.

-Agricultural applications: Agricultural films play an important role in greenhouse and farmland coverage. The blown film unit can produce agricultural films of different thicknesses and specifications, increasing crop yields and reducing water loss.

-Medical industry: In the medical field, blown film units can be used to produce sterile packaging materials, ensuring the safety and effectiveness of medical devices and drugs. High performance medical films can also prevent the penetration of blood, bacteria, and other substances.

-Industrial use: such as waterproof film, Babbitt film, etc., widely used in industries such as construction, chemical, and electronic manufacturing to provide protection for products.

The current status of technological development of blown film units

With the development of technology, the technology of blown film units is also constantly advancing. In recent years, the following technological developments have been particularly significant:

1. Automation and Intelligence: Modern blown film units are increasingly introducing automation control to monitor various data in real-time during the production process, including temperature, pressure, flow rate, etc. This not only improves production efficiency, but also greatly reduces labor costs.

2. Energy saving technology: With the increasing awareness of environmental protection, energy-saving and environmentally friendly blown film equipment has gradually become the mainstream in the market. Some companies have improved the energy efficiency ratio of their equipment and effectively reduced energy consumption by optimizing design and improving materials.

3. Multifunctionality: Nowadays, blown film units can be combined with multiple functions according to demand, such as simultaneously producing multi-layer composite films, functional films with special functions, etc., to meet the market's demand for different thin films.

4. Application of new materials: In technological research and development, more and more new materials are being used in blown film units, improving the performance and environmental protection properties of products. For example, the application of biodegradable plastics not only meets the market's requirements for environmental protection, but also maintains production stability.

The future development trend of blown film unit

Looking ahead to the future, the development of blown film units can foresee several important trends:

1. Acceleration of intelligent manufacturing: In the future, with the development of the Internet of Things and artificial intelligence technology, blown film units will place more emphasis on intelligent management, improving production efficiency and product quality through data analysis.

2. Environmental Protection and Sustainable Development: Environmental protection will be an important direction for future blown film units. Enterprises will pay more attention to the application of biodegradable materials and the recycling of waste materials, promoting the sustainable development of environmentally friendly production.

3. Personalized customization: With the diversification of market demand, personalized customization will become an important means of competition for enterprises. The flexibility and versatility of the blown film unit will be further explored to meet the different needs of customers.

4. Global market layout: With the development of global economic integration, blown film unit enterprises will pay more attention to the exploration of international markets, enhance their competitiveness through technical exchanges and cooperation, and jointly promote the development of the industry.

Overall, blown film units are constantly moving towards intelligent, environmentally friendly, and multifunctional development due to their high efficiency, stable performance, and wide market applications. The future blown film unit will not only be a simple production tool, but also an important force driving industry progress.