What should be checked during daily maintenance of Dalian blow film unit

The production process of the film blowing machine first adds dried polyethylene particles to the feeding hopper, and then the particles enter the screw through their own weight from the hopper. The vertical thrust of the inclined plane pushes particles forward. During the pushing process, the friction between plastic and screw, plastic and barrel, collision friction between particles, and external heating of the barrel melt the plastic. Molten plastic is filtered by the machine head to remove impurities before being molded. After cooling, inflation, etc., the finished film is rolled into a tube shape.

The main structure of the film blowing machine is mainly composed of an extruder, a machine head, a mold head, a cooling device, a stable foam frame, a herringbone plate, a traction roller, a coiling device, etc. The extruder mainly consists of a screw, a barrel and a hopper, a reduction and driving motor. The driving motor adopts an electromagnetic speed regulation motor (or a frequency conversion ordinary motor can also be used), and the reducer is driven by a belt drive to rotate the screw in the barrel. The plastic particles melted in the hopper under external heating are filtered through a three-way filter and squeezed from the mold mouth.

What should be checked during daily maintenance of Dalian blow film unit

You should check the thickness of the tractor's film and whether its traction speed is too fast or too slow. If there are corresponding issues, you need to conduct timely inspections and solutions, otherwise it may have some impact on your movie production.

Then there is the air storage pressure. How high is the air pressure? During the inspection process, it should not be too high, but there should also be sufficient standby pressure. Then, it is necessary to check whether the proportion of raw materials in the barrel meets the standards. The raw materials need to be mixed evenly and the ratio needs to meet the requirements, otherwise the film produced during the production process cannot meet the standard requirements. Check for impurities in the raw materials, especially by promptly using a magnet to check for iron mixing.

Blowing film equipment produces film and is suitable for various high-end film packaging. This type of film, due to its good barrier properties, freshness, moisture resistance, frost resistance, oxygen resistance, and oil resistance, can be widely used for light and heavy packaging. Such as packaging of various fresh fruits, meat products, Pickled vegetables, fresh milk, liquid drinks, medical supplies, etc. But it's not made from garbage plastic, it's made from plastic pellets. The group is suitable for blowing plastic films such as low-density polyethylene (LDPE), high-density polyethylene (HDPE), and linear low-density (LLDPE).

Multi layer co extrusion blown film machine is a film made by simultaneously extruding and laminating different raw material ratios through multiple die heads. It is generally used for product packaging. Due to its good barrier properties, freshness, moisture resistance, frost resistance, oxygen resistance, and oil resistance, this film can be widely used in light and heavy packaging. Such as various fresh fruits, meat products, Pickled vegetables, fresh milk, liquid drinks, medical supplies, etc. The key factor determining the application range of a film blowing machine is the different materials used.