Steel strapping heads
A steel strapping head is the assembly that performs the key cycle of the strapping process: feeding & collection of the strap, tensioning, cutting and sealing to ensure a stable strapping of the product.
In a production process, the strapping head is crucial to achieve repeatable strapping, reducing incidents, streamlining the process, minimizing labor and maintaining production with consistent performance.
Our SAIZAR strapping heads for steel strap (16–32 mm)
At SAIZAR, we work with an exclusive strapping head model that allows products to be strapped with steel strap from 16 mm to 32 mm wide. In order to work with different strap widths, it is necessary to replace a few parts of the strapping head.
Our strapping heads are hydraulic, offering greater efficiency, robustness and safety in the strapping tensioning, feeding and sealing process. The tensioning force to be applied and even the strapping movement speeds can be adjusted via the HMI depending on the type of product to be strapped.
The strapping heads can work with steel straps from any strap supplier, provided that certain technical requirements of the strap are met in order to guarantee the correct operation of the strapping head.
In-house design and manufacturing
We design, manufacture and test the strapping heads entirely at our facilities, which allows us to adapt the solution to the actual process and working conditions of each customer.
Sealing systems available (notch, linker, TIG welding points)
We can work with all sealing systems available on the market, selecting the most suitable one for your application.
These are the different sealing systems available on the market that SAIZAR can supply:
- By notching
Sealing is performed directly on the strap itself, without the need for any consumables. This sealing system can apply different notches to the strap, with the notches becoming deeper as they progress. Depending on the type of application, a total of 3 notches, 4 notches, 3+1 notches and up to 5 notches can be applied. - With linkers (seal)
In this case, in order to seal the strap, the head must automatically insert a connector into the strapping position. The connector is usually of the open type and adapted to the width of the strap to be used. The strapping head has a storage compartment that can hold up to 250 connectors. - By TIG welding points
Sealing can be carried out using different TIG welding points, depending on the application and size of the strap, with between one and four welding points being used. This requires welding machines and argon cylinders, which are used for this type of application.
Intelligent system: strap position control
Our strapping heads include an intelligent strapping system: we know the position of the strap at all times and can automatically correct any misalignment during the strapping process. In other words, if any anomalies occur during the strap feeding and collection process, the strapping head detects them and attempts to resolve the problem automatically without the need of an operator intervention.
Typical applications and working environments
The strapping heads for steel strap are used when is needed high mechanical requirements and product stability are needed, depending on the volume and weight of the product to be strapped.
The environment is also important. The sector offers heads designed to work in both “clean” conditions and harsher environments (humidity, temperature, environmental corrosion), always with a design focused on the robustness and maintainability of the equipment.
Steel head with notch Ranges and technical data (16, 19, 25 and 32 mm)
| CASA 16 | CASA 19 | CASA 25 | CASA 32 | |
|---|---|---|---|---|
| Dimensions | Length 580 mm |
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| Width 700 mm |
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| Height 900 mm |
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| Strap width | 16 mm | 19 mm | 25 mm | 32 mm |
| Strap thickness | 0,60 mm / 1,00 mm | 0,60 mm / 1,00 mm | 0,70 mm / 1,20 mm | 0,70 mm / 1,20 mm |
| Sealing | Notching: 3 double notches in the same sense. Open Linkers TIG welding (1-2 points) |
Notching: 3 double notches in the same sense. Open Linkers TIG welding (1-2 points) |
Notching: · 3 double notches in the same sense. · 4 double notches in the same sense. · 3 double notches in one sense + 1 double notch in the opposite sense. Open Linkers TIG welding (1-2 points) |
Notching: · 3 double notches in the same sense. · 4 double notches in the same sense. · 3 double notches in one sense + 1 double notch in the opposite sense. · 4 double notches in one sense + 1 double notch in the opposite sense. Open Linkers TIG welding (1-2-3-4 points) |
| Sealing resistance at different strap widths | With linkers Between 45-80% of the breaking load of the strap (depending on the type of linker as well as the type of strap) By notching Between 70-85% of the breaking load of the strap (depending on the type of notching as well as the type of strap) By TIG welding points Between 75-85% of the breaking load of the strap (depending on the type of TIG welding points as well as the type of strap) |
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| Strap feeding/collection speed | 2 m/s | |||
| Tensioning force | 7000 N - 14000 N | 7000 N - 16000 N | 7000 N - 18000 N | 7000 N - 21000 N |
| Hydraulic pressure | 100 bar. | |||
| Working pressure | 6 bar. | |||
| Electro valve pressure | 24 V C C | |||
| Strapping head weight | 220 kg | 240 kg | ||
Download technical data sheet
How to choose the right strapping head
Strap width:
16, 19, 25 or 32mm
Type of sealing:
with linker or with TIG welding points and the need (impact, vibration, efficiency of the sealing, etc.)
Type of product:
to be strapped, format, dimensions, weight, and number of straps to be applied
Type of strapping required:
whether for strapping the product transversely, longitudinally, radially, circumferentially, or around the perimeter
Tension target:
transport/handling conditions after strapping
Environment and maintenance:
accessibility, durability and ease of intervention
Integration:
into the strapping machine or Line head position and layout
Contact our technical department for a customised solution
Integration into Automatic Strapping Machines and Packaging Lines
We integrate the strapping head into an Automatic Strapping Machine or packaging line, together with a strap dispenser, strap accumulator, metal structure, strapping head movement system, strap arch & guides, protective covers, and equipment automation.
The operating environment is also important; depending on the sector, strapping heads are designed to operate in both ‘clean’ conditions and harsher environments (humidity, temperature, environmental corrosion), always with a design focused on the equipment’s robustness and maintainability.
Service, spare parts and technical support
If you need operational continuity, after-sales technical support matters: in addition to during the project, we support you with technical service and spare parts supply, to maintain system performance over time.
Frequently asked questions
What range of strap does your steel strapping head support?
We work from 16 mm to 32 mm in width. The most common sizes are 16 mm, 19 mm, 25 mm, and 32 mm.
What does it mean for the strapping head to be “Intelligent”?
We control the position of the strap and automatically correct misalignment or abnormal situations during the strapping process.
What kind of seals can be used on steel strap?
Depending on the application, it is used the notching sealing system (sealess), linkers (metal staple) or TIG welding points.
When is it appropriate to use a notching sealing system, linkers or with TIG weldding points?
The choice depends on the type of product, working conditions, subsequent maintenance, product handling, and the format and dimensions of the product. For round formats with a diameter of less than 800 mm or flat surfaces less than 150 mm, the sealing system with linkers must be used. For all other applications, the sealing system with a linker can also be used, as well as sealing systems by notches or TIG welding points. This depends on various factors that must be taken into account by the manufacturer and the customer in order to determine the most suitable solution for the application
What are the advantages of sealing by notching?
Sealing is performed without any consumables. It is the fastest sealing process and requires the least maintenance of all the different sealing systems on the market.
Does the plant environment affect the choice of strapping head?
Yes, in environments with humidity/corrosion/temperature, a design focused on robustness and maintainability is key.
Can I integrate the head into a complete packaging line?
Yes, the strapping head is the core of the strapping system and is integrated with a strap dispenser, strap accumulator, metal structure, strapping head movement system, strap arch & guides of strap, protectors and equipment automation inside automatic strapping machines or packaging lines.
What information do you need to recommend the right solution for me?
Product (type and dimensions), width of the strap, type of strapping required for the product, type of sealing desired, cadence, and conditions for integration into your machine/line.
Does the type of product to be strapped affect the choice of the strapping head?
Yes, depending on the product to be strapped, its dimensions and weight, as well as its subsequent handling and storage, will influence the choice of sealing type to be used.