Manufacture of rubber compounds and moulded rubber parts to customer specifications in Radevormwald
Manfred Hoffmann GmbH & Co. KG
Radevormwald (Headquarters, Production and Sales)New on Amplifa
About Gummi Hoffmann
Manfred Hoffmann GmbH & Co. KG is a family business founded in 1971, now in its third generation of family ownership, based in Radevormwald in the Bergisches Land region. Its core competence is the development and manufacture of rubber compounds using proprietary formulations to customer specification or to customer-provided formulations, including new developments based on article specifications and any colour settings. The rubber types processed are NBR, SBR, NR, EPDM, CR, CSM and BR with hardness levels from 30 to 95 Shore A. Compound production takes place in the kneader with batch weights of approx. 75 kg as well as on the two-roll mill with approx. 40 kg per batch. Since 1998 the company has had an injection moulding department in which moulded rubber parts are produced to customer specifications. The compounds supply a wide range of industries and industrial sectors; since 2014 the company has been certified to DIN EN ISO 9001:2015.
- Site
- Radevormwald
- Processes
- Rubber compound production (kneader formulations), Rubber compound production (two-roll mill formulations), Rubber injection moulding (injection moulding department since 1998), Manufacture of moulded rubber parts to customer specifications, Hardness testing (DIN 53505), Tensile strength and elongation at break testing (DIN 53504), Rheometer testing (DIN 53829), Mooney viscosity testing (DIN 53523)
- Materials
- NBR, SBR, NR, EPDM, CR, CSM, BR, NBR (Acrylonitrile-Butadiene Rubber)
- Certificates
- ISO 9001:2015, ISO 9001
- Founded
- 1971
- Industries
- Rubber industry, Various industries and industrial sectors, A wide range of industries and industrial sectors (general)
- 01
Formulation and compound development to customer specification
- 02
Compound production in the kneader or on the two-roll mill
- 03
Rubber injection moulding into moulded parts
- 04
Testing and inspection certificate per DIN EN 10204 3.1
- 05
Sales
Rubber Types and Processes
NBR (Acrylonitrile-Butadiene Rubber)
Rubber type for compound formulations to customer specification.
SBR (Styrene-Butadiene Rubber)
Rubber type for compound formulations to customer specification.
NR (Natural Rubber)
Rubber type for compound formulations to customer specification.
EPDM (Ethylene-Propylene-Diene Rubber)
Rubber type for compound formulations to customer specification.
CR (Chloroprene Rubber)
Rubber type for compound formulations to customer specification.
CSM (Chlorosulphonated Polyethylene)
Rubber type for compound formulations to customer specification.
BR (Butadiene Rubber)
Rubber type for compound formulations to customer specification.
Kneader Compound
Compound production in kneader formulations with a batch weight of approx. 75 kg.
Two-Roll Mill Formulation
Compound production on the two-roll mill with a batch weight of approx. 40 kg.
Rubber Injection Moulding
Manufacture of moulded rubber parts to customer specifications in the injection moulding department established in 1998.
Locations
Radevormwald
DEHeadquarters, Production and Sales
- Materials
- NBR, SBR, NR, EPDM, CR, CSM, BR
- Kneader (rubber mixer, batch weight up to approx. 75 kg)
- Two-roll mill (batch weight approx. 40 kg)
- Injection moulding machines
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Rubber compound production (kneader formulations)Plastics | – | – | approx. 75 kg (batch weight) | – | NBR, SBR, NR, EPDM, CR, CSM, BR |
| Rubber compound production (two-roll mill formulations)Plastics | – | – | approx. 40 kg (batch weight) | – | NBR, SBR, NR, EPDM, CR, CSM, BR |
| Rubber injection moulding (injection moulding department since 1998)Plastics | – | – | – | – | NBR, SBR, NR, EPDM, CR, CSM, BR |
| Manufacture of moulded rubber parts to customer specificationsPlastics | – | – | – | – | NBR, SBR, NR, EPDM, CR, CSM, BR |
| Hardness testing (DIN 53505)Testing | – | – | – | – | Rubber |
| Tensile strength and elongation at break testing (DIN 53504)Testing | – | – | – | – | Rubber |
| Rheometer testing (DIN 53829)Testing | – | – | – | – | Rubber |
| Mooney viscosity testing (DIN 53523)Testing | – | – | – | – | Rubber |
| Test methods: specific gravity (DIN 53479), ageing (DIN 53508), rebound elasticity (DIN 53512),Testing | – | – | – | – | Rubber |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Kneader (rubber mixer, batch weight up to approx. 75 kg) | – | – | – | – | Radevormwald |
| Two-roll mill (two-roll mill formulations, batch weight approx. 40 kg) | – | – | – | – | Radevormwald |
| Injection moulding machines (injection moulding department) | – | – | – | – | Radevormwald |
Additional services
Quality
The company has been certified to DIN EN ISO 9001:2015 since 2014 (LRQA, certificate no. 10747932, valid until 23.03.2029). Upon customer request, an inspection certificate per DIN EN 10204 3.1 is issued; the range of test methods includes, among others, hardness (DIN 53505), tensile strength and elongation at break (DIN 53504), Mooney viscosity (DIN 53523) and rheometer testing (DIN 53829); further analytical tests are carried out in cooperation with institutes and service laboratories.
| Evidence | Radevormwald |
|---|---|
| ISO 9001 |
History
- 1971
Foundation of Manfred Hoffmann GmbH & Co. KG at the Herbeck site in Radevormwald
- 1985
Andreas Hoffmann is appointed Managing Director
- 1990
Relocation to the current site in the Mermbach industrial estate
- 1992
Company founder Manfred Hoffmann steps down as Managing Director
- 1998
Establishment of an injection moulding department
- 2014
First certification to DIN EN ISO 9001:2015
- 2015
Installation of a photovoltaic system with a rated output of 100 kWp
- 2016
Conversion of the production hall and office rooms to LED technology
- 2018
Installation of a new highly efficient compressed air generator
- 2019
Maximilian Hoffmann becomes Managing Director; installation of two 11 kW charging stations
- 2020
Introduction of a new ERP system