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How does a flow wrap machine work?

If you’re in the packaging industry, you’ve probably come across a flow wrap machine at some point. This type of machine is commonly used to package various products, such as candy bars, cereal, and even medical devices. But have you ever wondered how it works? In this article, we’ll dive into the inner workings of a flow wrap machine and explain how it gets the job done.

What is a Flow Wrap Machine?

A flow wrap machine is a packaging machine that wraps products in a film or foil, sealing them to create a tightly packaged product. These machines can handle a wide variety of products, ranging from food items to non-food items like medical devices and electronics.

The Basics of Flow Wrap Machines

Before we dive into the nitty-gritty of how a flow wrap machine works, let’s cover some basics. A typical flow wrap machine consists of several key components:

Infeed Conveyor

The infeed conveyor is where the products are placed onto the flow wrap machine. It’s usually a simple conveyor belt that moves products into the machine at a steady pace.

Film Roll

The film roll is where the packaging material is stored. It’s typically a large roll of plastic or foil that feeds into the machine and is used to wrap the products.

Forming Box

The forming box is a component that shapes the packaging material around the product. It’s responsible for creating a “pocket” that the product sits in before it’s sealed.

Sealing Jaws

The sealing jaws are responsible for sealing the packaging material around the product. They use heat and pressure to create a tight seal that keeps the product fresh and secure.

Discharge Conveyor

The discharge conveyor is where the finished products exit the flow wrap machine. It’s usually a simple conveyor belt that moves the packaged products out of the machine and onto the next stage of the packaging process.

The Flow Wrap Machine Process

Now that we’ve covered the basics, let’s dive into the process of how a flow wrap machine works.

Step 1: Product Infeed

The first step in the process is to feed the products onto the infeed conveyor. The products are typically fed in a single file to ensure that each one gets wrapped properly.

Step 2: Film Unwind

Once the products are on the infeed conveyor, the packaging material (in the form of a roll) is unwound and fed into the machine. The film is typically fed through a series of rollers that help to guide it into the correct position.

Step 3: Film Forming

As the film is fed into the machine, it passes through the forming box. The forming box shapes the film into a “pocket” that the product will sit in before it’s sealed.

Step 4: Product Loading

Once the film is in position, the product is loaded into the pocket that the forming box has created. The product sits securely in the pocket, ready for sealing.

Step 5: Film Sealing

With the product in place, the sealing jaws come together to seal the film around the product. The sealing jaws use heat and pressure to create a tight seal that keeps the product fresh and secure.

Step 6: Cutting

After the film has been sealed around the product, the excess film is cut away. This is typically done using a rotary cutter or a static blade.

Step 7: Discharge

With the excess film removed, the finished product is discharged from the flow wrap machine onto the discharge conveyor. The product is now ready to be packaged and shipped.


In conclusion, flow wrap machines are an essential component of the packaging industry. They use a combination of conveyor belts, film rolls, forming boxes, sealing aws, and cutting mechanisms to efficiently package a wide range of products. By understanding the process behind a flow wrap machine, businesses can improve their packaging operations and ensure the quality and freshness of their products.


  1. What types of products can be packaged using a flow wrap machine?
  • Flow wrap machines can package a wide range of products, including food items like candy bars, baked goods, and frozen foods, as well as non-food items like medical devices and electronics.
  1. How fast can a flow wrap machine package products?
  • The speed of a flow wrap machine varies depending on the machine’s size and capabilities. Some machines can package up to 100 products per minute, while others can handle even higher volumes.
  1. Is it difficult to maintain a flow wrap machine?
  • Like any machinery, flow wrap machines require regular maintenance to ensure they continue to function properly. However, with proper care and maintenance, these machines can last for many years.
  1. Can flow wrap machines be customized to fit specific products?
  • Yes, flow wrap machines can be customized to fit specific products. This can include adjusting the machine’s size and shape, as well as modifying the packaging material and sealing mechanisms.
  1. Are flow wrap machines environmentally friendly?
  • While flow wrap machines can produce a significant amount of packaging waste, some manufacturers are taking steps to make their machines more sustainable. This can include using biodegradable or recyclable packaging materials and implementing more efficient packaging processes.

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