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Thermoformed. Foam. Wire basket

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Comparison of workpiece carrier systems:
Why modular solutions offer decisive advantages

In modern manufacturing environments, workpiece carrier systems play a key role in determining efficiency, component protection and automation capability. However, not all technologies meet the increasing requirements for traceability, variant management and process integration. Compared to conventional systems such as foam inlays, thermoformed tra ys and wire cleaning baskets, the modular workpiece carrier systems from the ZELL Group(www.zell-group.com) offer significant advantages.

Feature Foam inlay Thermoforming carrier Wire basket ZELL system
Component fixation Loose, not dimensionally stable Medium, no resilience Not defined Form-fit & tension-free
Automation-capable No Limited No Yes, pick & place optimized
Suitable for cleaning Not suitable Limited Very good Validatable & flushable
Variant change New cut Completely new tool required Manually reload Change clip only
Traceability (DMC/RFID) Not possible External only Not per component Can be integrated per position
Transport compatibility KLT possible KLT / one-way Universal use Standard formats (KLT, Euro)
Sustainability / Reusable Disposable Disposable Yes Yes, durable & stackable
Economic efficiency for variants Only for small series Expensive if changed Inexpensive, but inflexible Modular & scalable

Foam inlays - inexpensive but limited

Advantages:

  • Low entry costs
  • Good cushioning during transportation
  • Customizable for small quantities

Disadvantages:

  • Not suitable for cleaning - absorb cleaning media, unsuitable for ultra-fine cleaning
  • Limited service life - mechanically sensitive, wear out with frequent use
  • Not suitable for automation - no defined component position, unsuitable for robotics
  • No traceability - items cannot be coded, no RFID/DMC possible
  • Volume disadvantage - foam layers with thick walls reduce the usable volume of KLTs/containers

Conclusion: Suitable for prototyping or one-off transports - but inefficient in automated series processes.

Thermoformed trays - often underestimated, rarely economical

Advantages:

  • Low weight, easy to handle
  • Individually moldable (for large quantities)
  • Suitable for disposable or shipping packaging

Disadvantages:

  • High tool costs for modifications - each tray requires a new complete tool
  • Hardly modular - no individual components can be changed
  • Dimensional stability suffers at higher temperatures or aggressive media
  • Not scalable - variant changeover = new development, high time-to-market
  • Limited automation - difficult control for pick-and-place, as positioning varies

Conclusion: Useful for constant quantities and geometries - but quickly costly for flexible production.

Wire cleaning baskets - robust, but not process-safe

Advantages:

  • Open structure for cleaning & drying
  • Heat-resistant - suitable for autoclaves and washing systems
  • Stable, durable, stackable

Disadvantages:

  • No defined positioning - components move freely → Risk of scratches, collisions
  • Not process-capable with automation - no clear gripping points for robots
  • High insertion effort - no clip recording or coding
  • No protection for sensitive surfaces - not suitable for precise functional surfaces

Conclusion: Ideal for simple cleaning runs - not suitable for reliable series production or automated lines.

The modular ZELL solution: one system for all processes

The workpiece carrier systems from the ZELL Group combine the advantages of all systems - without their weaknesses.

Typical advantages:

  • Modular & scalable - holder, clip, material interchangeable with the same carrier
  • Standard formats - Compatible with KLT, Euro containers, racks, palletizers
  • Robotics-ready - pick-and-place, AGV & camera systems can be easily integrated
  • Tracking - RFID, DMC, engraving directly on the item or carrier plate
  • Suitable for cleaning - stainless steel & PA6-GF30 for ultrasound, aqueous media, autoclaves
  • Sustainable - reusable, washable, durable

ZELL systems are successfully used by manufacturers such as Müller Präzision, NTK, SFS, medical technology companies, automotive OEMs and defense suppliers - worldwide, series-tested, modular.

Future-proof processes require modular workpiece carriers

In a production environment that balances robotics, cleaning, logistics and variant handling on a daily basis, there is no alternative to modular carrier systems. The systems from the ZELL Group ensure reproducible quality, short changeover times and digital traceability - with an economical and future-proof platform approach.

Request a CAD example or test carrier now.

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FAQ

Which workpiece carriers are suitable for which applications?

Depending on the application, we recommend starting with our "Factory" workpiece carriers, as these can be configured both as inserts for Euro containers and as standalone functional carriers. More demanding applications are better suited to our reinforced "Carrier" or "Stainless Steel" carriers.

Can components be cleaned directly in the carrier?

Yes, all carriers are washable. Samples can be provided for specific critical process parameters.

Are the systems suitable for robots?

Yes, all workpiece carriers are compatible with automation systems, form a defined matrix, and can therefore be configured for robotic use. Components are arranged in such a way that grippers can be positioned accordingly. Because the carriers are designed to be cleanable, they are slightly heavier; therefore, their weight and center of gravity must be taken into account when handling the entire carrier.

What is the maximum temperature range?

Our plastic carriers operate reliably over extended periods at temperatures of approximately 60–70°C, and in some cases even at significantly higher temperatures during short cycles. Our stainless steel carriers—particularly the GRID carriers—can be used in furnaces at temperatures up to 1,200°C. For additional specifications, please refer to our material data sheets.

Can ESD requirements be met?

Yes, all plastic components can be manufactured with an antistatic additive. See also the data sheet in the Downloads section.

Can we produce custom clips?

Yes, ZELL can custom-manufacture component holders, as well as entire workpiece carriers or inlays for containers, as a single injection-molded component. We typically start by reviewing the more than 1,300 available variants using our ZELL configurator; if no satisfactory solution is found there, customers can work with our engineering team to develop a “new clip.” These can be tested in 3D and as prototypes before the corresponding injection mold is manufactured.

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