Injection moulding and metal technology: custom plastic solutions and standard products from development to logistics
Oskar Lehmann GmbH & Co. KG
Blomberg-Donop · Alte Chaussee 59-70, 32825 Blomberg-Donop (Head office / Production)New on Amplifa
About Oskar Lehmann
Oskar Lehmann GmbH & Co. KG, based in Blomberg-Donop (NRW), is a specialist in technical plastic solutions with a complete in-house value chain from product development through design, prototyping and in-house toolmaking to injection moulding, assembly and logistics. Production is carried out using conventional injection moulding, gas-injection moulding (GID), 2-component and hybrid technology (plastic with metal or felt). More than 250 different thermoplastics are processed, including polyamide (also glass-fibre reinforced), polyethylene, hybrid systems PA/steel and PA/brass, as well as bioplastics. In addition to custom product solutions, the company offers an extensive catalogue range of standard products such as glides, plugs, caps, height adjusters, control elements and cable management. Customers come mainly from the automotive/e-mobility sector, the furniture industry, shopfitting and shelving, health and rehab, mechanical and equipment engineering, and measurement and control technology. Sales are exclusively to industry and trade.
- Site
- Blomberg-Donop
- Processes
- Injection moulding (conventional 1K), Gas-injection moulding (GID), 2-component injection moulding (2K), Hybrid injection moulding (plastic with metal or felt), Toolmaking / mould making, Prototyping using 3D plotting, Prototyping using SLS (Selective Laser Sintering), Assembly of subassemblies
- Materials
- Thermoplastics (over 250 different types), Polyamide (PA), Glass-fibre reinforced polyamide (PA-GF), Polyethylene (PE), PA/steel (hybrid), PA/brass (hybrid), Steel, Bioplastics
- Certificates
- ISO 9001, IATF 16949
- Industries
- Operating and business equipment (shopfitting, shelving, ladders), Vehicle construction (automotive, e-mobility), Health and rehab (facilities for the disabled, hospital and care beds), Machines and devices (equipment engineering, mechanical and plant engineering), Metal construction and fabrication (windows and fittings), Furniture industry (office furniture and accessories)
- 01
Product development / 3D-CAD design and simulation
- 02
Prototyping (3D plotting, SLS)
- 03
Tool and mould making (CNC machining, EDM)
- 04
Injection moulding (1K, GID, 2K, hybrid)
- 05
Surface finishing (electroplating, metallising, painting, printing)
- 06
Assembly of subassemblies
- 07
Quality inspection and logistics
Materials and Processes
Conventional injection moulding (1K)
Standard process for thermoplastics such as PA, PA-GF and PE.
Gas-injection moulding (GID)
Enables hollow, mass-reduced components without a volume imprint.
2-component injection moulding (2K)
Combines two plastics in a single step, e.g. hard/soft combinations.
Hybrid injection moulding (plastic/metal/felt)
Joins plastic with steel, brass or felt in the injection moulding process.
Polyamide (PA)
Robust engineering plastic, e.g. for adjustable glides and control elements.
Glass-fibre reinforced polyamide (PA-GF)
High-strength material for height adjusters and load-bearing components.
Polyethylene (PE)
Used, for example, for covers and anti-slip plugs.
Hybrid PA/steel
Combination for star-knob and handwheel-type control elements with high load capacity.
Hybrid PA/brass
Used for control elements with thread requirements.
Bioplastics
Processed on request, e.g. for special colours and customised solutions.
Selective Laser Sintering (SLS)
Prototyping of polyamide plastic parts.
3D plotting process
Rapid plastic prototypes in the development phase.
Sites
Blomberg-Donop
DEHead office / Production
- Materials
- Thermoplastics, PA, PA-GF, PE, hybrid PA/steel and PA/brass, bioplastics, steel
- Over 100 injection moulding machines (including BOY)
- Die-sinking EDM machines
- Wire EDM machines
- CNC-controlled machining centres
- Optical 3D metrology (GOM)
- Optical metrology / digital measuring projectors (Keyence)
- Coordinate measuring machines (optical and tactile, max. 900 x 1600 x 600 mm)
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Injection moulding (conventional 1K)Plastics | – | – | – | – | Thermoplastics, PA, PE, PA-GF |
| Gas-injection moulding (GID)Plastics | – | – | – | – | Thermoplastics |
| 2-component injection moulding (2K)Plastics | – | – | – | – | Thermoplastics |
| Hybrid injection moulding (plastic with metal or felt)Plastics | – | – | – | – | Thermoplastics |
| Toolmaking / mould makingEngineering | – | – | – | – | Steel |
| Prototyping using 3D plottingAdditive | – | – | – | – | Plastic |
| Prototyping using SLS (Selective Laser Sintering)Additive | – | – | – | – | Polyamide |
| Assembly of subassembliesAssembly | – | – | – | – | Plastic |
| Surface finishing (electroplating, metallising, painting, printing)Surface | – | – | – | – | Plastic |
| 3D-CAD design and simulationEngineering | – | – | – | – | – |
| Metrology / quality inspection (optical and tactile measuring machines, colour measuring devices,Testing | – | – | – | – | – |
8 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Injection moulding machines | – | over 100 | – | – | Blomberg-Donop |
| Injection moulding machines | BOY | – | – | – | Blomberg-Donop |
| Die-sinking EDM machines | – | – | – | – | Blomberg-Donop |
| Wire EDM machines | – | – | – | – | Blomberg-Donop |
| CNC-controlled machining centres | – | – | – | – | Blomberg-Donop |
| Optical 3D metrology (GOM) | GOM | – | – | – | Blomberg-Donop |
| Optical metrology / digital measuring projectors (Keyence) | Keyence | – | – | – | Blomberg-Donop |
| Coordinate measuring machines (optical and tactile) | – | – | max. 900 x 1600 x 600 mm | – | Blomberg-Donop |
Additional services
Quality Management
Certification according to DIN ISO 9001:2015 (since 1996) guarantees stable production processes based on the zero-defect principle; since 2021 the company has additionally been certified according to IATF 16949:2016. Quality assurance employs optical 3D metrology (GOM), digital measuring projectors (Keyence), optical and tactile coordinate measuring machines (max. 900 x 1600 x 600 mm), as well as colour measuring devices and CAQ/SPC systems.
| Evidence | Blomberg-Donop |
|---|---|
| ISO 9001 | |
| IATF 16949 |
Company History
- 1961
Foundation of the company
- 1965
Hiring of the first employee
- 1969
Construction of the first production hall with administration building
- 1992
First injection moulding order in the millions
- 1996
DIN ISO 9001 certification
- 2003
Entry into the office furniture sector with height adjusters, furniture glides and cable management
- 2011
Construction of the 2nd production hall; cooperation with partners and development of an own bio line
- 2014
Demolition of the old production hall; construction of a new hall for toolmaking and the 3rd production hall; entry into the e-mobility market
- 2016
Introduction of the guiding principles for leadership and collaboration
- 2017
Finalist in the 'Großer Preis des Mittelstandes' with the award 'with clock'
- 2018
approx. 200 employees, 5,600 sqm of hall space, 99 injection moulding machines, over 30,000 sqm of operational area
- 2020
Commissioning of the 4th production hall
- 2021
IATF 16949:2016 certification