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Highest possible demands on casting and rolling technology

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Delivery methods

KEMPER has a wide range of delivery methods:

  • loops
  • coiled strips
  • POLYCOIL®

The most common delivery method is rings. Particularly long wire lengths are achieved when the strip ends are welded together and the strip is either coiled or made as a POLYCOIL®. POLYCOIL®s can be processed on disc reels without any additional downtime caused by loops being changed.

Delivery methods

POLYCOIL® (left), coiled strips (right)

Dimensions
Strip thicknesses 0.1 - 2.0 mm
Strip widths 3 - 340 mm
Loops Inside diameter 300/400 mm
Outside diameter up to 1350 mm
loop weight up to max.
12 kg/mm strip width
Coils up to 1800 kg (with and without flange)
POLYCOIL® up to 3000 kg

Profiling

When profiling the strips by milling or peeling, it is possible to have different material thicknesses in one strip. This allows various functions to be implemented:

  • specific manufacturing for spring characteristics
  • improved bending properties in areas with reduced strip thickness

In many instances, the stamping, embossing and bending costs can be considerably reduced by using a profiled strip. Depending on the demands on the material and the dimensions, KEMPER peels the material in-house or has it milled at Profiltech Stufenbandprofile GmbH, a sister company of the KEMPER Group. Profile strips are characterised by:

  • low tolerances
  • a high degree of flexibility in the design of the profile shape
  • a range of design options
  • in the thickness transition area (flank angle, radius)
  • low voltage input
  • high potential reduction in thickness in the profiled
  • area (up to 90%)

Dimensions
Strip thicknesses 0.1 - 4 mm
Strip widths 2 - 190 mm
Surface treatment

Surface treatment

The demands on rolled strips in industrial processing are continuously increasing, which is why metallic surface coating treatments are frequently required. KEMPER has its own hot-dip tinning process in which the metal strip is drawn through a tin bath. Electroplating is available upon request at partner companies.

All hot-dip tinning variants are lead-free and are characterised by the following key features:

  • excellent adhesion between the tin coating and the base material
  • low whisker formation
  • good soldering characteristics
  • optimum surface protection
  • economical manufacturing costs

KAT Kemper Advanced Tin

KAT® (KEMPER Advanced Tin)

KAT® is a hot-dip tinning with increased hardness and improved abrasion resistance. These properties are achieved through a specific combination of the tinning process and the rolling steps.

Advantages of KAT® in further processing:

  • lower tin abrasion when stamping
  • reduced formation of tin filaments when stamping
  • reduced tool wear

Advantages of KAT® for coated connectors:

  • lower insertion and pull-out forces
  • lower frictional wear
  • increased number of cycles