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Fontijne Grotnes Group

Build your future on our experience

Leading supplier of 6 manufacturing markets

The Fontijne Grotnes Group is one of the world’s leading suppliers of innovative processes, manufacturing equipment and related services:

  • Canning technologies

    Fontijne Formitt canning cell for catalytic converters is suitable for hard & soft stuffing of exhaust aftertreatment compone...

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  • Tube spinning technologies

    Fontijne Formitt is the perfect partner for your tube spinning needs. We offer a cost effective way to form the end of a diam...

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  • Tire and wheel assembly lines

    Fontijne Ghyselinck builds turn-key and standalone automatic tire and wheel assembly equipment. Suitable for steel and alumin...

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  • Steel wheel manufacturing equipment

    Fontijne Grotnes designs & builds steel wheel manufacturing equipment since 1918, varying from standalone machines to fully a...

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  • Pipe industry

    Fontijne Grotnes is market leader in designing & building LSAW and HSAW pipe expanders for the oil & gas industry.

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  • Metalforming equipment

    Fontijne Grotnes builds expanders, shrinkers and rollformers for the sizing of rings, cylinders, cones, bearings, flanges, be...

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  • Platen Presses

    Fontijne Presses builds & designs hydraulic laboratory presses used in the polymer processing, rubber, and composites industr...

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Canning technologies

Fontijne Formitt Logo Canning Technologies

Fontijne Formitt is a technology pioneer for state-of-the-art equipment for the manufacturing of exhaust after-treatment components with full part traceability, including the patented Adaptive Gap Control (AGC) and Rotary Sizing.

Canning is an automatic or manual assembly process to wrap a catalytic converter substrate in a protective support mat and insert the assembly into a shell or can. Catalytic converters are used for light vehicles (LV), commercial vehicles (CV) motorcycles, off road equipment and marine applications which use a combustion engine, fueled by either petrol (gasoline) or diesel.

Emission norms for catalytic converters


To comply with stricter emission norms, more sophisticated exhaust systems (catalytic converters) need to be developed and produced. The production method developed by Fontijne Formitt enables manufacturers of a new generation more complex and vulnerable catalytic converters to the achievement of cleaner air.

Our canning cells

The Fontijne Formitt canning cell contains several methods to assemble the catalytic converter substrate with the support mat into a stainless steel tube. Fontijne Formitt offers different solutions to assemble catalytic converters:

  • Hard stuffing
  • Soft stuffing
  • Advanced soft stuffing with our patented AGC system & Rotary Sizer

Hard stuffing

Hard stuffing starts with a pre-formed hollow shell with a predetermined final size and shape where the wrapped substrate is being pushed in.

The housing is not reduced in diameter or otherwise resized after the wrapped substrate is inserted into the housing. The hard stuff process is relatively quick and economical, since it can be accomplished in a single step.


Soft stuffing

Diesel Canning transfer stationDuring a soft stuffing process the diameter of the housing is reduced to a predetermined size after assembly of the shell and the wrapped substrate.

Mat & Substrate Measurement Station:

Weigh & Measure with Poka Yoke system: Provides non-contact measurement of the substrate diameter and length as well as the support mat weight to determine the target shell diameter for a specific Gap Bulk Density (GBD).

AGC (patented): A pressure based system that measures the substrate and support mat together as an assembly (simulating the conditions in the shell), and determines the shell diameter for an accurately targeted holding pressure.

Wrapping Station:

This station wraps the mat around the substrate.

Insertion Station:

This station inserts single or multiple substrate/mat assemblies into the shell to the specified axial position. Offering three methods of insertion; nominal, hard and soft stuffing.

Sizing Station:

This station reduces the shell circumference to the target diameter, we can offer following solutions:

  • Shrinking by use of a Barrel Sizer: The Barrel Sizer uses segmented tooling to radially reduce the converter shell to a predetermined target diameter.
  • Sizing by use of a Rotary Sizer (patented): The Rotary Sizer uses rotary tooling to allow radial reduction of the converter shell as it travels axially through the sizer, making it ideal for multiple brick assemblies.

Marking station:

This station will mark the catalytic converter by laser engraving or label with part number and other relevant data.

Our unique measuring and sizing patents

The AGC System

AGCThe correct holding force on the mat/substrate assembly within the shell of the catalytic converter is of critical importance for the durability of the catalytic converter. Our patented AGC system provides a means to collect the diameter and shape values of the substrate including the mat as an assembly, and then selects a suitable compression sequence for optimized holding force.

The results of the data capture are automatically forwarded to the sizing equipment, which optimizes the sizing process.

The Rotary Sizer

Rotary SizerOur patented Rotary Sizer is capable of automatically reducing the converter shells to single or multiple variable target diameters (determined during the AGC process of the individual wrapped substrates).

Rotary Sizing technology uses a radial roller based sizing technique that minimizes sizing tool contact on the shell (reducing stress to the substrate and support mat) while eliminating the costs associated with multiple tools for different length substrates.  Additionally, the reduction carried out with the Rotary Sizer reduces the amount of ‘spring back’ that is generally found with other shell reduction methods.

Traceability/poka yoke

With the focus on improving quality, reducing costs, optimizing processes, and ultimately improving time-to-customer throughout your supply chain, having a strong traceability initiative is a key component to overall success.

Our canning machinery is equipped with several traceable RFID-tags (Radio-frequency identification). This improves quality by ensuring that the appropriate tooling is being used and also to provide HMI security.


Request for quotation

At Fontijne Formitt, we take every project seriously through each step of the process. Our experts will analyze your request to provide the best solutions for your future canning equipment with an eye to cost savings and production efficiencies.

Please be as specific as you can in your request.