Sealing manufacturer for die-cut gaskets, washers and punched insulating parts made from non-metallic materials.
Ernst Lingenberg GmbH
Altena (headquarters) · Nachrodt-Wiblingwerde · RosmartNew on Amplifa
Sealing manufacturer since 1930
Ernst Lingenberg GmbH is a sealing manufacturer founded in 1930, headquartered in Altena with production in Nachrodt-Wiblingwerde. The company produces non-metallic gaskets, sealing rings and discs, washers, punched and insulating parts as well as custom-made parts to customer drawings. Materials processed include aramid fibre materials (e.g. Donit, Frenzelit, Klinger, Reinz), rubber grades such as EPDM with drinking-water approval, Perbunan, neoprene and silicone, technical plastics such as polyamide, PTFE and PVC, as well as vulcanized fibre, hard paper and hard fabric; metallic materials and materials containing glass fibre are not processed. Production is carried out by die-cutting on hydraulic presses with manual or tong feed, cutting on a plotter/cutting table, and the processing of plastic films in roll format on a roll-cutting machine; since 2024, a dedicated department has been producing flange gaskets. Customers are OEMs and series manufacturers from the electrical, sanitary and fittings industries as well as fastening technology. Standard delivery times are 4–5 weeks; urgent batches of around 1,000 to 20,000 pieces are produced overnight by the 25-strong team.
- Site
- Altena
- Processes
- Die-cutting of gaskets, washers and punched insulating parts, Production of hose rings and hose washers, Production of cone washers from rubber hoses or rubber sheets, Cutting/trimming on plotter/cutting table, Processing of plastic films in roll format, Production of flange gaskets, Production of rubber hose articles, Custom-made parts to customer drawings
- Materials
- Aramid fibre (e.g. Donit, Frenzelit, Klinger, Reinz, formerly Hecker), Rubber - EPDM (with drinking-water approval), Perbunan, Neoprene, Silicone, Para Grau, Natural rubber, SBR
- Certificates
- REACH/RoHS-compliant production, Drinking-water approval (optional)
- Founded
- 1930
- Employees
- 25
- Industries
- Electrical industry, Sanitary engineering, Fastening technology, Fittings industry, OEM & series manufacturers
- 01
Material selection and consulting
- 02
Design according to customer drawing
- 03
Cutting/die-cutting
- 04
Quality inspection
- 05
Picking and worldwide delivery
Materials and processes
Aramid fibre
Heat-resistant, chemical-resistant fibre materials (e.g. Donit, Frenzelit, Klinger, Reinz) for gaskets with high compressive strength.
EPDM rubber
Rubber grade with optional drinking-water approval, among other things for sanitary and fittings applications.
Perbunan, neoprene, silicone, SBR, natural rubber
Rubber grades in all Shore hardnesses for hose rings, cone washers and gaskets.
Technical plastics
Polyamide 6/6.6, polyacetal, polystyrene, HDPE, PTFE, rigid and flexible PVC as well as polyethylene for electrically insulating parts.
Vulcanized fibre
Cellulose-based high-performance material with high mechanical strength, chemical resistance and electrical insulation.
Hard paper, hard fabric, pressboard, cardboard
Hard materials for washers and insulating parts in the fastening and electrical industries.
Cellular PE and cellular rubber
Cellular materials for sealing and damping applications.
Locations
Altena
DEHeadquarters
Nachrodt-Wiblingwerde
DEProduction since 1949
- Lot size
- 1 pc. to over 500,000 pcs.
- Materials
- Aramid fibre, rubber, vulcanized fibre, plastics, hard paper, pressboard
- Hydraulic presses
- Press with manual feeds
- 2 presses with tong feed
- Semi-automatic swing-arm cutting press
- Plotter/cutting table
- Roll-cutting machine
Rosmart
DEFlange gasket production (since 2020/2021)
- Materials
- Aramid fibre, vulcanized fibre, rubber
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Die-cutting of gaskets, washers and punched insulating partsPlastics | – | – | – | 1 pc. – more than 500,000 pcs. | Aramid fibre, Rubber, Vulcanized fibre, Plastics, Pressboard, Hard paper, Hard fabric, Cardboard, Polyethylene, PVC |
| Production of hose rings and hose washersPlastics | – | 8-50 mm outer diameter | – | – | Rubber (natural rubber, EPDM, Perbunan, neoprene, SBR,, Flexible PVC |
| Production of cone washers from rubber hoses or rubber sheetsPlastics | – | – | – | – | EPDM (APTK) |
| Cutting/trimming on plotter/cutting tablePlastics | – | – | – | – | Non-metallic materials |
| Processing of plastic films in roll formatPlastics | – | – | – | – | Plastic films |
| Production of flange gasketsPlastics | – | – | – | – | Aramid fibre, Vulcanized fibre, Rubber |
| Production of rubber hose articlesPlastics | – | – | – | – | Rubber |
6 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Press with manual feeds | – | – | – | 2016 | Altena |
| Press with tong feed | – | 2 | – | 2016-2017 | Altena |
| Hydraulic press | – | – | – | – | Altena |
| Semi-automatic swing-arm cutting press | – | 1 | – | 2016 | Altena |
| Plotter/cutting table | – | 1 | – | 2016 | Altena |
| Roll-cutting machine | – | 1 | – | 1990 | Altena |
Additional services
Quality
The raw materials processed are quality-tested and have been sourced from long-term partners for years; the products comply with REACH and RoHS directives and can, depending on the application, be manufactured with drinking-water approval.
| Evidence | Nachrodt-Wiblingwerde |
|---|---|
| REACH/RoHS-compliant production | |
| Drinking-water approval (optional) |
Company history
- 1930
Founded as a factory for technical leather goods by Ernst Lingenberg
- 1949
Nachrodt-Wiblingwerde location; production of gaskets and punched parts for the fittings and electrical industries
- 1960
Start of production of rubber hose articles
- 1972
Construction of the warehouse for intermediate products
- 1978
Expansion of production facilities
- 1987
Construction of a new warehouse building for raw materials
- 1990
Commissioning of a roll-cutting machine; start of processing plastic films in roll format
- 1995–2012
Expansion and rationalization of the machine fleet
- 2013
Construction of a new production and warehouse hall
- 2015
Daniel Maiworm joins the management; installation of a racking system and a shelving system
- 2016
Acquisition of a semi-automatic swing-arm cutting press and a plotter/cutting table
- 2016–2017
Acquisition of a press with manual feed and two presses with tong feed; overhaul of the hydraulic presses
- 2020
First gasket at the Rosmart location
- 2021
Move into the new building
- 2024
Flange gasket department begins production