A capping machine is one of the most used packaging devices in manufacturing, but how does it work? Also, what are its typical uses? This application guide will answer all your questions. Let’s begin with the machine’s definition.
What is a Capping Machine?
A capping machine, or capper, is a mechanical device that applies caps, plugs, and other fitments to containers like bottles, jars, etc. It can be a small-sized type for small-scale sealing or industrial-grade for increased volumes.
The machine helps manufacturers meet product preservation, presentation, and integrity needs. Automatic cappers increase outputs, ensuring businesses remain profitable while serving specific market demands.
The types of caps and containers the machine can work with vary widely. Likewise, there are cappers for every business size, production need, and other requirements. Let’s examine the machine’s parts below.
Resource: https://www.packworld.com
Capping Machine Parts
The industrial capper is a complex, automatic machine with many parts. These parts work together to execute cap delivery, placement, and tightening steps. The following are its main components.
Cap Feeding System
This section keeps a steady supply of caps. It stores, sorts, aligns, and delivers the caps to the closing station. It typically consists of these individual parts.
- Cap Feeder – restocks the hopper in automatic cappers.
- Hopper – for holding caps before application.
- Sorter – it sorts the caps, ensuring only qualified pieces pass through.
- Orienter – for aligning and positioning caps with the open side facing down.
- Chute – an inclined channel that delivers the caps to the closing head.
Capping Station
This part secures the caps to the containers by pushing, tightening, or inserting them. It comprises the following depending on the machine type.
- Gripper/Chuck – for holding the caps in place.
- Spindle – it spins to tighten the caps to the container.
- Air Cylinder – uses compressed air to push and twist caps on containers.
Drive System
The drive system is the mechanical part that ensures the machine performs its various functions. The parts that make it and their functions include:
- Actuators – they include electric motors, valves, and other parts that cause motion.
- Conveyor Belts – for transporting containers along the production line.
- Gears – for transferring the motor rotation and controlling speed.
Control System
The control system regulates the capping process, ensuring everything runs as expected. It also allows you to set various parameters, including closure speed.
- Controller – processes data and decides process actions.
- Sensors – they detect changes like position, motion, absence/presence, proximity, etc.
- Software – the program that holds control logic and instructions.
- Indicators/Display – for showing statuses and setting process parameters. Automatic cappers use touchscreen interfaces that operators can interact with.
Resource: https://www.packagingdigest.com
How a Capping Machine Works
We can divide the machine’s operation into cap feeding and container sealing. Each step includes a few tasks and components. Here’s how the automatic type executes the tasks, including the involved parts.
Cap Feeding
The cap feeding system sorts and delivers caps, placing them on the containers. Some even start the caps on their thread. The system syncs with the filling system, ensuring the bottles are there when it delivers caps.
Cap placement is either direct, by a pick head, or pick and place. Direct placement involves depositing the cap from the chute. Pick and place placement requires robotic arms to move the caps.
Cap Closing
The closing station completes the packaging process, closing and sealing filled containers. It receives the caps and secures them on the containers.
Closing methods vary. The closing head may spin to screw caps on the container neck or move down and push a lugged shell. Sometimes, it has rollers on the sides that press against the cap sides to seal it to the neck.
Resource: https://www.infopackaging.it
Types of Capping Machine
We divide capping machines into various types based on these features: level of automation, the types of caps they apply, and design features. Each category has several design options, forming a classification group.
Classification by Automation Level
Cappers are available in various automation degrees. They can be manual, semi-automatic, or automatic. Here is how each works and other crucial information, including the features.
- Manual Capper – the manual type is a handheld or tabletop device. It has a rotating chuck that allows it to fasten pre-placed caps. It can be electric or pneumatically operated. The operator performs most functions.
- Semi-Automatic Capper – the semi-automatic version has manual and automated steps. User tasks include placing bottles underneath the fastening heat and start/stop functions.
- Automatic Capper – these are fully automated machines with complex controls and functions. They reduce human error and increase throughput.
Classification by Cap Type
Cappers are also grouped according to the types of caps they close. The following are key examples based on this classification method.
- Spindle Capper – the spindle or roller-screw capping machine fastens screw-on closers using a set of rubber wheels. It spins the cap into position, providing a tight seal.
- Chuck Capper – the chuck capper uses chuck heads to apply the caps, rotating them around the neck to close containers.
- Snap-On Capper – this type applies pressure instead of torque, pushing threaded and non-threaded closers onto containers.
- ROPP Capper – ROPP means Roll-On Pilfer-Proof, describing the non-threaded aluminum foil shell the machine closes on threaded necks. The ROPP capping machine uses rollers to press the shell, producing a tamperproof seal.
- Wheel Capper – this type pushes closers like corks into containers like bottles.
Classification by Design and Configuration
This classification method places capping machines into groups based on their construction and configurations. The capper types include inline, rotary, and monobloc.
- Inline Capper – the capping mechanism is linear on a conveyor belt. The containers move on this belt in a straight line while capping heads place and fasten caps.
- Rotary Capper – a rotary type has a turret construction. This part moves containers beneath cap-closing heads like chucks. Rotary cappers offer higher closing speeds and efficiency.
- Monobloc Capper – this type combines two operations in one device. An example is a bottle filling-capping machine.
Resource: https://www.packworld.com
Factors to Consider When Buying a Capping Machine
Finding the right machine for your business requires evaluating a product’s packaging needs. It also involves understanding the closer type you want to use and the estimated output. Consider these factors when buying one.
Production Output Needs
Manual cappers can only cap a few containers, making them suitable for low outputs. Small and medium businesses require semi or fully-automatic versions. Rotary types are best for high-volume production, with some offering over 1, 000 containers-per-minute speeds.
Container and Cap Compatibility
Cappers come designed to work with specific containers and caps, making proper selection crucial. Some use interchangeable closing heads and other parts. However, their application is usually limited to a few options.
Installation Space Requirements
How much space do you have for the installation? Capping machine manufacturers use varying designs to make the device. Choose a machine that will fit in the available area, especially if planning to integrate it into a production line.
Ease of Use and Maintenance
Some machines are less usable than others. These may require businesses to train workers on their use, causing them to incur costs. Consider its maintenance costs, which include part replacements and repair costs.
Capping Machine Applications
A capper is essential when sealing products during powder, granule, and liquid filling applications. It can be a jar, flask, tube, or bottle-capping machine. Industries that use the machine are diverse, with product applications including the following.
- Food and beverage – water, wine, carbonated drinks, juice, milk, jam, oil, honey
- Pharmaceutical products – powders, antibiotics, syrups.
- Skincare and cosmetics – creams, waxes, lotions, makeup products
- Industrial chemicals – inks and dyes, bleaches, solvents, corrosives, adhesives
- Agricultural products – pesticides, herbicides, fungicides, fertilizers, veterinary drugs
- Automotive products – oils, cleaners, waxes, battery water, additives, sealants
- Household products – bleach, detergents, liquid soap, disinfectants
Conclusion
A capping machine plays a key role in product manufacturing steps. It closes containers, protecting products while providing branding and meeting user experience needs. This guide’s information should help you understand the machine in detail, including how to buy one.
