What is Capping Machine? | How does Capping Machine work?

What is the Capping Machine?

A capping machine is an equipment that tightens caps to seal containers or bottles. The machines can either be automatic, semi-automatic, or manual. Capping equipment can improve production speeds and ensure product security.

Capping Machine

Using a capper in the production line eliminates repetitive tasks and ensures uniformity of your products. This article will help you understand more about the machines.

How a Capping Machine Works

Cap tightening machines use two systems to place a cap on a container. In the pick-off system, a precise cap chute delivers the cap, which is picked up by the bottle as it passes beneath the chute. The system is usually compatible with different caps, including skirted and aluminum caps. It’s common in rotary cappers and in-line capping machines.

The other system is known as pick and place. It includes a robotic arm that picks and places caps on the containers. Typically, this system is more versatile since it is compatible with almost every type of cap used in various industries for different products.

Capping Machine Working
Image credit: saintyco.com

After placing the caps on the containers, the bottle capper head seals the container, and the mechanism deployed depends on the type of seal and the nature of the products in question.

When using skirted aluminum caps, the machine applies downward pressure as the rollers molds the seal to fit on the bottleneck. But when using a threaded cap, the machine applies torque and downward pressure to create a tight hermetic seal.

Types of Capping Machines

The capping machine has the following major types:

1) Vertical Pluggers

Vertical wheel pluggers are built for speed and high efficiency. The machines are ideal for packaging lines with huge output volumes since the capper works in synchrony with the speed of bottles in the production line.

As the containers pass through the machine, they are sealed automatically. All the parts are attached to a spinning wheel, and the line pushes bottles onto the wheel for capping. The synchrony guarantees consistency, speed, and precision regardless of the type and size of caps.

The machines are mainly used in production lines to seal containers with plugs and stoppers. Therefore, they are unsuitable for processes that require angled capping.

2) Chuck Cappers

A chuck capper uses accessories that help the machine grip the caps and tighten them to seal containers. The capper arm descends on the bottle and uses torque to cap the container.

The machines are applicable in small and large production lines. Moreover, you can choose the level of automation depending on your production needs and plant size. A manual or handheld capping machine needs manual operation when handling each container.

Semi-automatic models only require the operator to place the caps on the bottle before the cap tightener machine takes over the process. On the other hand, an automatic capping machine requires minimal human intervention when capping the bottles.

3) Spindle Cappers

Spindle cappers can be automatic or semi-automatic. The system uses rubber disks to spin and seal bottles. The fully-automatic versions have a seamless cap delivery system, but a semi-automatic model requires the operator to place the caps on the containers.

The containers pass through different disks that apply torque on the caps to ensure consistent sealing. The cap delivery system consists of a vibrating bowl and a vibrator that supplies the caps seamlessly.

4) Snap Cappers

Snap cappers seal containers by snapping or pressing the seal on the container. They are often ideal for different containers, and they ensure an efficient and convenient capping process.

The sealing machines can use plastic or metal caps to close glass, metal, and plastic bottles. Also, the cappers have an automatic delivery chute to make the process consistent and reliable for any production plant.

Applications of Capping Machines

Capping bottles and containers are among the last procedures in any production line. Capping machines are used for various applications, and most industries rely on a bottle capping machine to tighten closures for their products.

Cappers can be different based on the specific application. Some models are built for industrial, agricultural, chemical, or food and beverages industries.

1) Industrial and General Packaging

Automatic capping machines are invaluable in numerous industrial applications. The machines simplify the capping process when packaging and securing the products.

The cosmetic industry uses automatic cappers to secure various containers and packages. In addition, industries dealing with sensitive products require cappers to ensure the security of the products.

2) Food and Beverages

Food processors and beverage companies often use easy-to-open containers for packaging preserved foods. The manufacturers need a jar capping machine to seal the containers, whether the products are packed in a can or bottle.

3) Chemical and Agricultural

Agricultural inputs such as liquid fertilizers and pesticides usually come in bottles or containers with tight seals for security purposes. Manufacturers have to use an automatic bottle capping machine to seal the containers to ensure the caps are tamper-proof and secure.

4) Pharmaceutical Industry

Pharmaceutical manufacturers produce different drugs and medicines that come in various packages. These products have strict regulations due to their sensitive nature, and manufacturers must use security seals.

Capping machines ensure that containers have tamper-proof seals to ensure the products are uncontaminated.


It’s essential to have a reliable and efficient capping system to ensure the efficiency and uniformity of your products. The appropriate capping equipment depends on your production needs and the type of products you deal with.

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