Capping is sometimes underestimated in a packaging project. However, as the number of products increases, more container formats are introduced or consistent screw capping becomes a priority, this operation can quickly become a bottleneck.
Should you continue capping containers manually? Switch to a semi-automatic machine? Or consider an automatic solution integrated into a packaging line?
There is no one-size-fits-all answer. The right level of automation depends on production volumes, the type of cap, the container, the required production rate and the way the business is organised.
The aim is therefore not necessarily to automate as much as possible, but to choose a solution that meets current needs and supports the anticipated development of production.
Manual Capping: Suitable for Small Batches and Flexible Production
Manual capping remains a suitable solution in certain situations.
For small-scale production, dozens or hundreds of containers can still be capped manually, particularly when there are numerous product references and production volumes are limited.
This solution has the advantage of simplicity. It does not necessarily require dedicated equipment and offers considerable flexibility when container formats or caps change frequently.
However, this flexibility has its limits as production volumes increase.
When Should You Consider a Semi-Automatic Solution?
Switching to semi-automatic equipment is often a useful intermediate step.
It allows you to retain a degree of flexibility while mechanising the capping operation.
For example, the operator can position the container and cap, while the machine performs the screw capping operation.
This arrangement can be particularly suitable for businesses that are beginning to increase production but do not yet need a fully automated packaging line.
Semi-Automatic Capping to Support Gradual Growth
An SME can automate only the operation that is becoming problematic.
This is an important point: there is no need to automate the entire packaging process all at once.
If filling can still be managed manually but screw capping is becoming too time-consuming, a semi-automatic screw capping machine can already provide a practical solution.
This approach also allows the business to adapt gradually as production develops.
What Are the Signs That It Is Time to Automate Capping?
Several indicators may suggest that it is time to review your setup.
1. Capping Is Slowing Down Production
If filled products accumulate before the closure stage, capping has become a bottleneck.
It is then worth assessing the actual capacity of each stage of the packaging process.
2. The Number of Containers Is Increasing
A method that works perfectly well for 100 containers a day may become difficult to maintain when production reaches several thousand containers.
The challenge does not necessarily come from the product itself, but from the volume that needs to be processed.
3. Consistent Screw Capping Is Becoming a Priority
When capping is carried out manually, it can be more difficult to ensure consistent results.
A mechanised solution provides greater control over the screw capping process, depending on the technology and configuration selected.
4. Operators Are Spending Too Much Time on This Operation
If a significant proportion of working time is devoted to capping, automation can free up operators to focus on other tasks.
5. Filling and Labelling Are Already Automated
If a filling machine and a labelling machine are already operating automatically, manual capping may become the stage that limits the overall efficiency of the process.
In this case, integrating a screw capping solution can be particularly worthwhile.
What Does a Semi-Automatic Screw Capping Machine Offer?
A semi-automatic screw capping machine mechanises the operation while retaining operator involvement.
It is an interesting solution when production requires greater consistency but does not yet justify full automation.
It can also be a stepping stone towards a gradual automation strategy.
The choice of machine depends on several factors, including:
- The type of cap;
- The container;
- The cap diameter;
- The type of closure;
- The required tightening level;
- The target production rate;
- The frequency of format changes.
When Should You Switch to an Automatic Screw Capping Machine?
Moving to automatic equipment becomes particularly worthwhile when production volumes and operating requirements make manual intervention too time-consuming.
An automatic screw capping machine can then be integrated into a continuous production flow alongside other operations.
The container arrives on the conveyor, the cap is presented and the screw capping operation is performed automatically according to the machine’s configuration.
The benefit is the elimination of a manual operation while synchronising capping with the other stages of the packaging process.
Our range of capping, screw capping and capsule closing machines includes various solutions for projects involving different container and closure specifications.
Not All Closures Are Handled in the Same Way
The term ‘capping’ actually covers several different operations.
A screw cap requires different equipment from a capsule or a push-on stopper.
The first step is therefore to identify the closure being used.
Screw Caps
Screw caps are tightened by rotation. A screw capping machine performs this operation.
Our VS 2000 and VS 600 machines illustrate different approaches to automatic screw capping.
The choice between the available solutions depends on the container, the cap and the production requirements.
Push-On Stoppers
Some stoppers are simply positioned and pressed onto the container.
In this case, the mechanical principle differs from screw capping.
Our VST is an automatic machine for feeding and inserting T-shaped stoppers.
This example shows why it is important to refer to the capping technology rather than simply talking about a ‘capping machine’.
Capsules
Capsules may also require a specific process depending on their design.
A capsule closing machine must therefore be selected according to the closure being used and the desired result.
Should You Automate Capping on Its Own?
Not necessarily.
Automation can be introduced gradually.
A business might start by mechanising filling, then move on to capping and finally labelling. This approach allows investment to be aligned with production growth.
Conversely, when a project is sufficiently developed, it may be more appropriate to consider a complete packaging line from the outset.
Several operations can then be combined, such as filling, screw capping and labelling.
Our complete K-Net Auto – VS400 – Ninon Mix line illustrates this approach, with successive stations dedicated to filling, screw capping and labelling.
Manual, Semi-Automatic or Automatic Capping: Which Solution Should You Choose?
The decision can be summarised as follows:
| Solution | Best suited to situations where… |
| Manual capping | Production volumes are low, batches are small and flexibility is the priority. |
| Semi-automatic capping | Production is increasing and the operation needs to be mechanised while retaining operator involvement. |
| Automatic capping | Production volumes, consistency requirements and integration with the rest of the packaging process justify full automation. |
This table provides an initial guide. The right choice ultimately depends on the cap, the container, the production rate and the overall process.
Moving from manual to semi-automatic or automatic capping is not simply a question of production volume.
It is primarily about time, consistency, organisation and the development of the packaging process.
For small-scale production, manual capping may remain perfectly suitable. As volumes increase, a semi-automatic solution can help you take the next step. Finally, when capping needs to operate continuously alongside filling and labelling, an automatic solution integrated into a packaging line may become the right choice.
We assess these projects by looking at the product, container, cap and production targets to determine the level of automation that is genuinely needed.
Is capping taking too long or limiting your production? Let’s discuss your containers, caps and production volumes to identify the capping solution best suited to your business as it grows.
FAQ: Manual, Semi-Automatic or Automatic Capping
When should you switch from manual to semi-automatic capping?
Switching to semi-automatic capping may be worth considering when the operation becomes time-consuming, production volumes increase or consistency becomes a priority.
When should you choose an automatic screw capping machine?
An automatic screw capping machine may be suitable when capping needs to be integrated into an automated production flow or when production volumes make manual intervention too time-consuming.
Might a small business need a capping machine?
Yes. The need depends more on the time spent capping, the required level of consistency and the way production is organised than on the size of the business.
Can you automate capping on its own?
Yes. A business can automate its packaging process gradually, starting with the operation that represents the main bottleneck.
Which machine should you choose for screw caps?
The choice depends on factors including the type and dimensions of the cap, the container, the production rate and the required configuration. Assessing the product and cap helps determine the most suitable solution.
What is the difference between a screw capping machine and a capsule closing machine?
A screw capping machine closes containers by rotating a screw cap. A capsule closing machine is designed for a different type of closure, depending on the capsule design and the process used.
Can a screw capping machine be integrated into a complete packaging line?
Yes. A screw capping machine can be integrated between filling and labelling to automate several consecutive packaging operations.
Do you need to automate the entire packaging process at once?
No. Automation can be introduced gradually. The right approach depends on the business’s priorities, current production volumes and expected future growth.
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Choosing a Capping Solution Suited to Your Container
CFIA 2024
