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Film Blowing Machine for Stretch and Shrink Film

December 14, 2025


A film blowing machine is a simple but very useful tool for making strong, thin plastic film slowly and steadily. It starts by gently heating the plastic grains. Then, a stream of clean air pulls the melted mixture to the top, where it forms a tube that gets wider and taller until it reaches the right thickness, which is a thin film sheet. This whole process seems pretty simple, since it runs in short cycles at a steady speed. This method is great for stretch and shrink film because it is safe, accurate, and neat, no matter how big or small the plant is. A blowing film machine is a popular choice for many people who want to make film for different types of packaging because it is easy to use and clean.

Essential Sides of Stretch and Shrink Film

Stretch and shrink films are very important for keeping products clean, safe, and whole when they are being stored or moved. These coatings keep dust, dirt, and water out of products and keep their shape. They feel soft but are very strong. They are great for many uses, like packaging food, tools, toys, and more, because they are both light and strong. are used in a lot of different kinds of businesses all over the world.

Simple Steps of the Film Blowing Flow

The flow of the movie is actually very planned and balanced, even though it seems simple. The unprocessed plastic goes into the hopper first. The film blowing machine heat then slowly melts the plastic, making it soft all over. The screw turns steadily, pushing the melt forward without making any sudden moves. The tube is an important part of the die. The film extrusion process is quick and easy, and it helps keep the film clean and uniform all the way through.


Steps to Take

  • Make a list of the main ingredients.

  • Melt slowly over low heat.

  • Turn the screw slowly but surely.

  • Bend the tube.

  • Let in fresh air.

  • Roll the movie after it has thawed.

Importances of Clean Air in Blow Film Making

Air constantly enters the film bubble from the inside during its run, so clean air is very important for making a clean film. Clean air helps keep a smooth bubble, stops small spots from forming, and keeps surface marks from forming. When stretch and shrink films are exposed to dry, filtered air, they stay taut and neat, which makes the film stronger and clearer. Employees check air filters all the time and clean up the area around their workstations because even a small amount of dust can make it hard to see.


Air Tips

  • Keep the air filter clean.

  • Make sure the place you work is clean and dry.

  • Get rid of dust on tools and floors.

Heat Control in the Film Blowing Line

Managing heat is important because it affects how the raw plastic melts. If the temperature rises too quickly, plastic can catch fire and get black spots. If the temperature is too low, the melting process might be slow and thick. A smart blown film extrusion line controls the temperature in each zone so that the melt flows smoothly through the die and screw. The film is smooth and accurate, and production doesn't change for long periods of time when the temperature is more evenly spread out. Controlling the heat not only makes the line easier to use for both customers and owners by cutting down on waste, but it also makes it more energy-efficient.


Heat List

  • Use heat sensors.

  • Check every area that is hot.

  • You should keep the heater and barrel clean.

Why Screw Design Is Vital

The screw on the film blowing machine is what mixes and pushes the hot plastic. The smart design of the screw means that the melted material doesn't have any lumps or thick spots. The film can keep its clarity, brightness, and strength because the mixture is now smooth and even. Many well-known companies make blown film extruders with complex screw designs that make sure the machine keeps working well even after long periods of use. A high-quality screw not only uses less power, but it also keeps the melt flowing smoothly through the die head and cuts down on drag.


Screw Notes

  • Deep channels help the flow go smoothly.

  • A steady push makes a steady mix.

  • Avoid bumps by using smart design.

Easy Care for a Film Extruder

A film extruder can last for many years without getting weaker if it is cleaned and checked often. A clean film blowing machine uses less power, works better, and makes cleaner film. When workers follow an easy-to-care-for plan, the blown film extruder lasts longer and needs fewer repairs. Regularly cleaning the barrels, checking the screws, checking the die heads, and lubricating the moving parts are all necessary to keep the run smooth and effective. Less maintenance makes it easier to keep the quality of each batch of film the same, which means less downtime.


Care Steps

  • Keep the barrel clean.

  • Check the holes for screws.

  • Check the head openings to make sure they are clear.

  • Be sure to oil all the parts that move.

When to Use a Lab Scale Blown Film Plant

Very small rolls of film may be produced by a lab scale blown film plant. It helps to try out different colors, resins, or strengths of film. A small lab facility makes sample rolls for quality checks instead of a big film blowing machine. This saves time and energy. Workers can easily and cleanly try out new ideas, and they don't waste raw materials.

Film Types & Use

Film Type

Use

Machine Fit

Stretch Film

Wrap goods

blown film machinery

Shrink Film

Pack sets

blown film extrusion machine

Thin Film

Bags and small packs

film extruder suppliers

Recommended Film Blowing Machines

YF-FEH High Speed ​​Film Blowing Machine

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This YF-FEH High Speed ​​Film Blowing Machine model is designed for handling large loads and operating over extended periods of time. It features intelligent heat control and smooth airflow that help keep the film clean and even. The machine runs quickly but remains stable, making it ideal for plants that require high output. It is designed for large blown film line systems that require reliable, steady, and clean film every day.

YF-PP Film Blowing Machine

YF-PP Film Blowing Machine

This YF-PP Film Blowing Machine is made for PP film. It makes an obvious and light film. The flow of melt remains smooth, and the machine operates with low power while still delivering a steady output. It is an excellent pick for food-safe wrap film because the film stays clean, neat, and soft.

YF-FEM Mini Film Blowing Machine

YF-FEM Mini Film Blowing Machine

This YF-FEM mini machine is small and easy to place in tight rooms. It helps new users learn the film blowing process and is great for small shops that need quick film runs. It is easy to move, easy to clean, and ideal for small extrusion tasks of film where space is limited.

YF-FED Single Screw Double-head Film Blowing Machine

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This YF-FED model features two heads, allowing it to produce two rolls simultaneously. It saves time, reduces power consumption, and increases output. It suits mid- to large-sized plants that require more film in a single run. The design helps keep both rolls uniform and clean.

Why Choose Ruian Yunfeng Machinery Co., Ltd.

Ruian Yunfeng Machinery Co., Ltd. is recognized for its strong, long-lasting, and user-friendly film blowing machines. Their designs are innovative, and their tools help users create clean film with minimal power consumption and waste. They are trusted film extruder suppliers offering a range of models for various plant sizes. Their support is friendly and helpful, and their site has full details for each model.

FAQs

  • What is a film blowing machine?

It is a tool that melts plastic and turns it into thin film through blowing and cooling.

  • What films can it make?

It produces stretch film, shrink film, and thin film for various applications.

  • What is the primary process?

The process includes melting, blowing, forming, cooling, and rolling.

  • Do I need high skills to run it?

No. The machine is straightforward, and a brief guide helps anyone get started.

  • Can I test film ideas?

Yes. Use a lab scale blown film plant for samples.

  • Which machine is best for small rooms?

The YF-FEM Mini Film Blowing Machine.