
CANNING
Explore the cutting-edge precision of Grotnes' canning technology, an efficient solution for the production of catalytic converters.

The Assembly Process
Grotnes offers both automatic and manual assembly processes for wrapping catalytic converter substrates in mats and inserting them into shells. Utilizing advanced laser measurement technology, our systems handle both hard and soft stuffing efficiently.
Applications
Grotnes canning cells are modular and designed to meet customers’ exact specifications. Depending on the determined market, Grotnes has extensive experience in passenger car, commercial vehicle and off-road emission aftermarket systems crafted to meet OEM specifications.
Features
For more than two decades, Grotnes has led the industry in size-to-fit catalytic converter assembly (canning) and pioneered many technologies such as adaptive gap control and rotary sizing. Today’s automatic canning cells are robust yet highly sophisticated and include such features as:
Mat and Substrate Measurement Station
Our non-contact measurement system accurately measures substrate dimensions and mat weight to industry standards. This process ensures precise determination of the target shell diameter for optimal Gap Bulk Density (GBD) and provides data for trend analysis and optimization.
Wrapping and Insertion Stations
Grotnes provides both manual and automated options for wrapping substrates. The Insertion Station, equipped to handle single or multiple substrate/mat assemblies, offers hard or soft stuffing options while monitoring position, pressure and velocity during insertion.
GBD Sizing Station
This station adjusts the shell circumference to the target diameter through two distinct methods: . Pre-Expand – Uses a segmented expander to increase the shell diameter based on precise measurements, followed by hard stuffing of the substrate/mat assembly through a funnel. Shrinking – Servo driven, cartridge style
End Sizing
Used for constant diameter end cone fit-up.
Push Out Station
Used for process verification
Part Marking
Both laser and dot peen are available
Data Tracking
Track and store process critical data for each assembly and component
Advantages
- All-Electric Servo-Driven Motion
- Manual and Automatic Equipment
- Flexible Automation
- Complete Data Tracking
- Compact Footprint
- Industry-Leading Cycle Times
- Quick-Change Tooling Including Cartridge-Style Sizer
- Tool Verification Option
Quote-to-Ownership Process
1. Request a Quote
Begin your journey by reaching out to Grotnes to request a detailed quote. Provide specifics about your metalforming needs and the types of materials you will be working with, allowing our team to tailor the machinery options to your requirements.
2. Consultation
Engage with our experts during a comprehensive consultation to refine your machinery specifications and explore additional features and customizations. This step ensures the equipment you choose perfectly aligns with your production goals and operational demands.
3. Finalize & Install
Once you approve the final specifications and quote, we’ll proceed with the manufacturing of your customized metalforming machinery. After production, Grotnes will coordinate the delivery and installation, ensuring everything is set up to operate seamlessly within your existing processes.