Plastic film blowing machine is a mechanical device that heats and melts plastic particles and then blows them into a film. It can be seen everywhere in our daily life, from shopping bags in supermarkets to industrial packaging films, they are inseparable from the films produced by film blowing machines.

Basic working principle of film blowing machine
The working principle of film blowing machine is relatively simple, but the process is very delicate. It is roughly divided into the following steps:

Raw material preparation: Add dry plastic particles into the hopper.

Extrusion molding: Plastic particles are extruded by the extruder under high temperature and high pressure to form a continuous plastic tube.

Blowing molding: The extruded plastic tube enters the die head and expands into a tube shape under the action of high-pressure air.

Cooling and shaping: The blown plastic tube is cooled and shaped by the cooling device to form a film.

Traction and winding: The cooled film is pulled and wound into a roll.

Types of film blowing machines
According to the type of film produced and the performance requirements, film blowing machines can be divided into many types, such as:

High-density polyethylene (HDPE) film blowing machine: Mainly used for the production of shopping bags, garbage bags, etc.
Low-density polyethylene (LDPE) film blowing machine: Mainly used for the production of cling film, wrapping film, etc.
Linear low-density polyethylene (LLDPE) film blowing machine: Mainly used for the production of stretch film, agricultural film, etc.
Co-extrusion film blowing machine: It can produce multi-layer co-extrusion films with better performance and functions.
Application of film blowing machine
The films produced by film blowing machines have a wide range of applications, mainly including:

Packaging industry: Used for packaging of food, daily necessities, and industrial products.
Agricultural field: Used to produce agricultural film, greenhouse film, etc.
Construction industry: Used to produce waterproof film, thermal insulation film, etc.
Advantages of film blowing machine
High production efficiency: The film blowing machine can produce continuously with high production efficiency.
Stable product quality: By precisely controlling the process parameters, stable quality films can be produced.
Strong adaptability: Films of different thicknesses and widths can be produced to meet various needs.
High degree of automation: Modern film blowing machines have a high degree of automation and are easy to operate.
Future development of film blowing machines
With the increasing awareness of environmental protection, the demand for degradable plastics and bio-based plastics continues to grow. In the future, film blowing machines will develop in the following aspects:

Green and environmental protection: Develop new environmentally friendly materials and processes to produce degradable and recyclable films.
Intelligent: Improve production efficiency and product quality by introducing intelligent control systems.
Customization: Provide customized production solutions according to customer needs.
Summary
As an important equipment in the plastic processing industry, film blowing machines play an important role in the national economy. With the continuous advancement of technology, film blowing machines will play a more important role in the plastic processing industry and bring more convenience to people’s lives.

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