What Is a Sealing Machine Meaning, Use and Price

This article will introduce you to the sealing machine and answer all your questions regarding its purpose, working and cost.

A sealing machine for food packaging
A sealing machine for food packaging
Resource: https://www.profoodworld.com

The sealing machine is a necessity in many factories and businesses. From food to cosmetics, many products require some type of seal in order to be properly packaged. You will also find sealers in non-industrial environments like a baker’s or in homes sealing food items. This article details everything may have wanted to know about sealers, from the types of products that use them to how they work.

What Is a Sealing Machine?

Let’s begin by looking at the sealing machine meaning. A sealing machine is described as a kind of device that uses heat and (often) pressure to create a seal between two surfaces. The type of sealer used depends on the following factors: the kind of products being sealed, the materials involved, and the nature of seal required.

For example, impulse sealers use a Teflon shielded heating bar to melt the edges of two pieces of plastic together, while continuous band sealers use moving rollers and belt to heat and fuse the materials. The Teflon helps prevent situations where plastic sticks to the hot, sealing bar.

Sealing machines come in a variety of different sizes and shapes to suit different production needs. They can be manual or automatic, tabletop or floor standing, and a variety of other designs. Let’s have a look at the manual and auto sealing machines.

Manual Sealing Machine

Manual sealers are mostly operated by hand. Examples are handheld and tabletop sealing machines. The operator places the product to be sealed into the machine and then uses a lever or handle to activate the sealer. The sealed product then has to be picked manually and placed in the next process.

A manual sealing machine is often used for low-volume production or for sealing odd-shaped products that cannot be easily fed into an automatic machine. They’re also the most used types of the machine in homes and offices owing to their small size, ease of use, and lower cost.

Automatic Sealing Machine

Automatic sealing machines are mostly equipped with conveyer belts or, in the case of rotary machines, a rotating platform. Products are placed onto the conveyor belt, which moves them through the seal head. The heating elements and/or rollers are activated automatically.

An example is the automatic L bar sealing machine which is used to seal food products in clear plastic bags. A sealing machine’s automatic working makes it suitable for high-volume production. Automatic sealers are, therefore mostly used in industrial applications. They’re also normally semi or fully automatic.

Semi-Automatic Sealing Machine

These sealers require the operator to place the product onto the conveyor belt and to the sealing machine strip to start the sealing process. The product then moves along the conveyor belt passing through the seal head with the sealing machine heater and a seal is applied.

Fully Automatic Sealing Machine

Fully automatic sealing machines require very little human intervention, carrying out the sealing steps autonomously. They’re thus used in high-speed production lines, together with other machines, to create a complete packaging solution. An example is a horizontal pouch sealing machine that can reach up to 600 packs per minute.

Sealing Machine Parts

The different parts of a sealing machine depend on its design and working mechanism. These vary from the sealing head, drive system consisting of an electric motor and a conveyor, a heating element, a heating bar, and, in the event of a fully automated sealer, a touch controller.

Other sealing machine parts can include a cutting device, a product stop, a cooling system, and an ejector mechanism. The sealing head is the most important sealer part. This part serves the purpose of introducing a seal to the package.

Sealing heads vary depending on the type of machine. It may be a simple heated bar in the case of hand sealing machines, such as I or L bar sealers, or a rotating seamer in the case of a rotary sealing machine. The sealing machine motor, together with the gear system, powers an automatic system. This part is not found in manual sealers.

Sealing Machine Working Principle

The sealing machine working principle is based on the fact that certain materials, when heated, melt and adhere to other materials. The process of sealing is achieved by heating a sealing bar or wire, which then melts the plastic or other material to form a seal. Here is how a sealing machine works. Notice that the machine we’ve picked is the hot press type, which is also the most common.

  • The heat required for sealing is typically provided by an electric current and passed through a heating element.
  • On the other hand, the sealing machine heating element is usually a resistive wire or an inductive coil and placed in contact with the sealing bar.
  • When the sealing bar reaches the required temperature, it’s brought into contact with the plastic.
  • The heat from the sealing bar melts the plastic, which then sticks to the other piece of plastic, forming a seal. The time for which the sealing bar is in contact with the plastic depends on the type of plastic and the thickness of the material, among other factors.
An automatic sealing machine
An automatic sealing machine
Resource: https://www.packagingdigest.com

Sealing Machine Price

The cost of sealing machine equipment varies with several factors such as the type of device, its size, and other features like added abilities. A small sealer means less cost but limited application. That aside, the price of sealing machine ranges from as little as $30 for a handheld sealer to more than $10,000 for an industrial fully automatic sealer.

Sealing machine cost also changes depending on the type of sealing head used. Some are more expensive than others. When buying a sealing machine, online shopping is a great way to start your search. You will always get a chance to reach various sealing machine manufacturers and lots of options including competitive price tags.


Sealing machines are an important part of many industrial, commercial businesses, and home applications. They can be used to seal a variety of items, from food products to boxes and packages. The type of sealing machine you need depends on the type of product you are sealing. There is also usually a broad range of prices for sealing machines, so it’s important to do your research before making a purchase.

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