Manufacturer of injection-moulded plastic spools – around 1,400 variants, cleanroom production and in-house toolmaking in Leopoldshöhe.
Häfner & Krullmann GmbH Kunststoff-Verarbeitungswerk
Leopoldshöhe (Krentruper Straße, main plant) · Leopoldshöhe (Westring, production/assembly/logistics centre)New on Amplifa
About Häfner & Krullmann
Häfner & Krullmann GmbH is a family-owned plastics processing plant based in Leopoldshöhe (North Rhine-Westphalia) and has been one of the leading manufacturers of spools made from thermoplastics for over 90 years. The company develops, designs and produces around 1,400 spool variants with diameters from 40 to 1,190 mm – including band spools, welding wire spools, ultra-fine wire spools, machine spools, winding cores, reel rings and spool containers for wires, cables, optical fibres, medical technology, photovoltaics and 3D printing. Production is carried out by injection moulding on 46 machines in three-shift operation with clamping forces up to 16,000 kN and shot weights up to 12,000 g; more than 6,000 tonnes of plastic are processed annually. Materials include PS, ABS, PE, PP, PA6, POM, PC, SAN and glass-fibre-reinforced PA. Injection moulding tools are manufactured in the in-house toolmaking department, CAD/CAM-networked with Moldflow simulation and high-speed milling. For medical technology, a cleanroom of Class 8 (ISO 14644-1) / cGMP Class D with a Rooming-In process is available. A logistics centre with over 5,000 m² of warehouse space and 10,000 pallet positions enables daily deliveries worldwide to 44 countries.
- Site
- Leopoldshöhe
- Processes
- Injection moulding, Cleanroom injection moulding, Toolmaking / high-speed milling, CAD/CAM tool manufacturing with Moldflow simulation, Assembly of machine spools, Quality inspection (tensile/compressive strength up to 500 kN, stress corrosion cracking testing,, Development and design of plastic spools using the injection moulding process, Toolmaking (CAD/CAM, Moldflow simulation)
- Materials
- Polystyrene (high-impact), Acrylonitrile-Butadiene-Styrene, Polyethylene, Polypropylene, Polyamide, Polyamide 6, Polyoxymethylene, Foam-structure polystyrene
- Certificates
- DIN EN ISO 9001:2015, DIN EN ISO 14001:2015, DIN EN ISO 50001:2018, AEO certificate
- Founded
- 1933
- Employees
- 160
- Industries
- Wire industry, Cable and line industry, Welding wire, Medical technology, Photovoltaics, Optical fibres
- 01
Project management & development (CAD/CAM, Moldflow simulation)
- 02
Toolmaking (high-speed milling up to 30,000 min⁻¹)
- 03
Injection moulding production (three-shift operation, up to 16,000 kN)
- 04
Cleanroom production for medical technology
- 05
Assembly of process and machine spools
- 06
Quality inspection (SPC, Zeiss metrology)
- 07
Labelling (VDA/KLT, barcode)
- 08
Warehouse logistics & shipping (over 5,000 m², daily to 44 countries)
Materials & Processes
Polystyrene (high-impact)
Standard material for LM spools, welding wire and band spools; impact-resistant and cost-effective.
Acrylonitrile-Butadiene-Styrene
For reinforced spools (EM, VMV, GM) and applications with chemical exposure or low temperatures.
Polyethylene
Used for spool bodies, including PE foam cladding on optical fibre spools.
Polypropylene
For spools with increased chemical exposure, also as foam structure (PP TSG).
Polyamide 6
For mechanically highly stressed spools, e.g. the VM series.
Glass-fibre-reinforced polyamide
Bushings with high abrasion resistance and emergency running properties.
Polyoxymethylene
For precise machine elements with high dimensional stability.
Polycarbonate
For applications with increased requirements for strength and transparency.
Styrene-Acrylonitrile
Alternative for welding wire spools for special applications.
Foam-structure polystyrene
Lightweight material for VM spools with reduced weight.
Locations
Leopoldshöhe (Krentruper Straße)
DEMain plant: production, toolmaking, administration, cleanroom
- Part weight / size
- Shot weight up to 12,000 g
- Materials
- PS, ABS, PE, PP, PA6, POM, PC, SAN
- 46 injection moulding machines (up to 16,000 kN clamping force)
- Injection moulding machine in the cleanroom (Rooming-In)
- High-speed milling up to 30,000 min⁻¹
- Zeiss coordinate measuring technology
- Tensile/compressive strength testing machine up to 500 kN
Leopoldshöhe (Westring)
DEProduction, machine spool assembly, logistics centre
- Materials
- PS, ABS
- Warehouse logistics over 5,000 m², 10,000 pallet positions
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Injection mouldingPlastics | – | up to 1,190 mm diameter (spools) | Shot weight up to 12,000 g | – | PS, ABS, PE, PP, PA, POM, PS TSG, SAN, PC, PA6, PA GV, PP TSG |
| Cleanroom injection mouldingPlastics | – | – | – | – | PS, ABS, PP, PA6 |
| Toolmaking / high-speed millingMachining | – | – | – | – | Steel (tool steel, implied) |
| CAD/CAM tool manufacturing with Moldflow simulationEngineering | – | – | – | – | – |
| Assembly of machine spoolsAssembly | – | – | – | – | PS, ABS |
| Quality inspection (tensile/compressive strength up to 500 kN, stress corrosion cracking testing,Testing | – | – | – | – | – |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Injection moulding machines | – | 46 | Clamping force up to 16,000 kN, shot weight 2–12,000 g | – | Leopoldshöhe / Rödinghausen |
| High-speed milling machines | – | – | up to 30,000 min-1 | – | Leopoldshöhe |
| Injection moulding machine in the cleanroom (Rooming-In) | – | 1 | Cleanroom Class 8 (ISO 14644-1) / cGMP Class D | – | Leopoldshöhe |
| Zeiss metrology (coordinate measuring technology) | Zeiss | – | – | – | Leopoldshöhe |
| Tensile/compressive strength testing machine | – | – | up to 500 kN | – | Leopoldshöhe |
Additional services
Quality
Quality assurance includes incoming inspection of raw materials, statistical process control (SPC), Zeiss coordinate measuring technology as well as tensile/compressive strength tests up to 500 kN and stress corrosion cracking tests. On request, individual inspection of all produced parts with individual coding is carried out.
| Evidence | Leopoldshöhe (Krentruper Straße) | Leopoldshöhe (Westring) |
|---|---|---|
| DIN EN ISO 9001:2015 | ||
| DIN EN ISO 14001:2015 | ||
| DIN EN ISO 50001:2018 | ||
| AEO certificate |
History
- 1933
Foundation with celluloid processing for the production of hair ornaments and combs
- 1952
Injection moulding processing for the toy industry, production of the first plastic spool
- 1972
Production of waste collection containers
- 1990
Opening of the second plant in Rödinghausen
- 1996
Certification according to DIN EN ISO 9001
- 2000
Certification according to DIN EN ISO 14001
- 2008
Opening of cleanroom production
- 2012
Certification according to DIN EN ISO 50001
- 2014
Opening of the Westring logistics centre / Leopoldshöhe
- 2017
Relocation of machine spool assembly and transfer of the Rödinghausen plant to the Westring
- 2019
Expansion of production space at the Westring