SOLUTIONS PARTNER

One-stop shopping at KROH

At KROH you get everything from a single source. Starting with the development and design to the construction of prototypes and tools right through to series production. The KROH service portfolio is completed by 5-axis CNC machining, a wide range of finishing processes, qualified assembly of complete assemblies as well as a comprehensive after-sales service.

As a special service, we also offer various engineering packages. This allows us to accompany you from an early stage in the development and manufacture of an item. By integrating our experience and expertise into the early phase of a project, you benefit from shorter lead times and reduced production costs. This results in an item that can be manufactured economically and quickly, and KROH benefits from the increased customer satisfaction.

  • Engineering package 1

    Consisting of

    • 1 aluminium prototype mould
    • 1 cavity or partial cut-out
    • Untempered
    • With Ureol jig
    • 1 mould proving
    • Incl. provision of materials
    • 3 samples for customers
    • Without full survey

    Used for

    • Visual component evaluation
    • Manufacture feasibility testing in the thermoforming process
    • Sample production for customers

    Package price on request

  • Engineering package 2

    Consisting of

    • Toolmaker, project manager, application engineer come to you for a workshop day and evaluate the item together with you for manufacturability, risk assessment, item design, item adaptation to thermoforming process and material selection
    • Creation of a joint specification sheet
    • Creation of a tool/mould design
    • Without full survey

    Used for

    • Cost optimisation
    • Increasing customer satisfaction
    • Technical clarification
    • Safe manufacture of a series items

    Package price on request

  • Engineering package 3

    Target

    Substitution of previous designs made from duromer fibre composite materials (GRP) with thermoplastic, thermoformable and recyclable materials

    • Drafting of a requirements profile for the material
    • Assessment and validation of specifications
    • Selection of suitable materials, comparison of advantages and disadvantages
      Required properties of the materials in respect of behaviour during temperature changes, UV resistance and chemical resistance, preselection of max. 3 materials
    • Procurement of sample sheets for prototype manufacturing in prototype moulds
    • Tensile test specimen with 2 laboratory days for analysis

    Dient zur

    • Ermittlung bestätigter Materialauswahl
    • konstruktiven Auslegung der Serienteile

    Package price on request

  • Engineering package 4

    Target

    Creation of product concept, validation of specifications, integration with assembly components, selection of suitable materials, examination of feasibility and manufacturability

    • Drafting of a requirements profile for the assembly or component
    • Assessment and validation of specifications
    • Selection of suitable materials as well as comparison of advantages and disadvantages
    • Integration of components
    • Examination of feasibility and manufacturability
    • Constructive design of the series production components as well as creation of the 3D data
    • Preparation of quotation

    Used for

    • Determination of the final material selection
    • Constructive design of the series production components

    Package price on request

Development and design

We develop the optimum solution based on your requirements. With the help of our CAD system, SolidWorks, and CAM system, Tebis, we generate all the production data required for manufacturing.

Material

Our sheet material is available in different surface designs and individual colours. Standard plastics such as ABS, PS, PE and PP – with electrically conductive and flame retardant modifications, too. Engineering plastics such as PC, PETA, PETG, PCABS blends, PPSU and ESD material – specialised for flame-retardant application and in compliance with EN 45545 for rail transport. PLA materials, bioplastics and 100% recyclable plastics complete our range.

Tool and mould-making

From your data, we manufacture the mould for vacuum thermoforming as well as the fixtures for further processing on our 5-axis CNC machining centres. We generate the necessary CAD data and 2D drawings at short notice. We use synthetic resin, wood or aluminium to manufacture the moulds and fixtures.

Deep drawing/thermoforming

KROH has one of the most modern machine parks. The average age of the GEISS T10 all-electric thermoforming machines is 3 to 4 years. The sheet feed (max. forming area 3500 x 2300 mm, max. thermoforming height up to 1200 mm) is fully automated. We also have two HAMER and ILLIG automatic thermoforming machines for rolled goods (material thickness of 0.3 to 3.0 mm).

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CNC machining

The CNC machining of the thermoformed components (3000 x 1800 x 560 mm) is carried out on state-of-the-art 5-axis CNC machining centres. For larger series production, two tandem systems with tool change systems are used. The milling centres are programmed using a modern CAM workstation with online data record management.

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Die cutting

Our die-cutting technology allows us to process thermoformed components quickly, precisely and without burrs – from small-scale to mass production. The result: efficient, cost-optimised and sustainable implementation.

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Finishing

We are proficient in a wide variety of finishing processes. These include the printing of components by screen printing, pad printing or transfer printing, the application of metallic surfaces by electroplating or high-vacuum vapour deposition, the incorporation of thread inserts by hot mounting as well as insert moulding for complex components. The application of lettering or logos by hot stamping is also included in our portfolio.

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Assembly and more

With our specialists and trained personnel, we offer just-in-time assembly. Our services include printing, coating, bending, joining, welding and cold welding, adhesive bonding, riveting, embossing, pressing, testing and die cutting. We are also certified to DIN 6701-2 (Adhesive bonding of railway vehicles and parts for A2, A3 and A4).

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Service

Our customers don’t just buy products – they count on a collaboration based on mutual trust. Our service starts in the planning phase of a project, with expert advice and support in the design phase from our project management team. It is completed with just-in-time delivery as well as a customised after-sales service.