Portfolio

Forms of Delivery

KEMPER has a wide range of delivery methods:

  • Pancanke Coils
  • Traverse Wound Strips
  • POLYCOIL®

The most common delivery method is pancake coils. Particularly long strip lengths are achieved when the strip ends are welded together and either travers wound or made as a POLYCOIL®.

POLYCOIL®s can be processed on disc reels without any additional downtime due to changing rings.

POLYCOIL®
POLYCOIL®
Traverse Wound Strips
Traverse Wound Strips

Dimensions

Thickness0,1 - 2 mm*
Width3 - 340 mm
Coils

Inner diameter 300/400 mm
Outer diameter up to 1,350 mm
Coil weight up to 12 kg/mm
strip width

traverse
wound strips
up to 1,800 kg
(with and without flange)
POLYCOIL® up to 3,000 kg

*Other dimensions on request.

Profiltech - Logo

Profiling

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

  • specific adjustment of spring characteristics
  • improved bending properties in areas with reduced strip thicknes

In many instances, the stamping, embossing and bending costs can be considerably reduced by using a profiled strip.

Depending on the requirements on material and dimensions, KEMPER skives the material inhouse or uses the milling process at Profiltech Stufenbandprofile GmbH, a subsidiary of the KEMPER Group.

Profiled strips are characterised by:

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

Examples for Profil strips

Profilieren von Bändern Beispiel 2
Profilieren von Bändern Beispiel 2
Profilieren von Bändern Beispiel 3
Profilieren von Bändern Beispiel 4
Profilieren von Bändern Beispiel 5
Profilieren von Bändern Beispiel 6
Profilieren von Bändern Beispiel 7
Profilieren von Bändern Beispiel 8

Dimensions

Strip thickness0,1 - 4 mm*
Strip width2 - 190 mm*

*Approximate values; actual dimensions are highly dependent on the hardness and temper conditions and can differ considerably. A feasibility assessment is mandatory for this reason!

Surface Coating

The requirements on rolled Strip in industrial processing are continuously increasing which is why metallic surface coating treatments are frequently needed. KEMPER has its own hot-dip tinning process in which the metal strip is drawn through a liquid tin bath. Electroplating can be offered on request and is completed by other companies.

Hot-dip tinning

  • Standard Hot-Dip Tinning
  • KAT® (KEMPER Advanced Tin) for improved Resistance to Abrasion
  • Aged Tinning (100 % intermetallic Phase)

Strip thickness

0,1 - 1,20 mm
Strip dimensions width5 - 340 mm
Plating thickness range

0,8 - 2 µm / 1 - 3 µm
2 - 4 µm / 3 - 6 µm
4 - 8 µm / 5 - 10 µm

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 cost

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