Aluminium gravity die casting from 5 g to 60 kg with CNC machining, surface finishing and assembly from a single source.
Metallgießerei Ralf Mewes GmbH
Velbert, Industriestraße 26 (Plant 1) · Velbert, Haberstraße 8–10 (Plant 2) · Wetterzeube (stainless steel/steel foundry, Gestaguss-GEW)New on Amplifa
About RM Guss
Metallgießerei Ralf Mewes GmbH (RM Guss) is a manufacturer of cast products based in Velbert. At its core, the company produces aluminium gravity die cast parts with unit weights of 5 g to 60 kg and dimensions up to 2000 x 1600 x 500 mm; in addition, zinc die casting as well as — through its partner Gestaguss-GEW in Wetterzeube — steel, stainless steel, grey iron, malleable iron and hard casting including manganese hard steel. Annual production volume is around 1,000 tonnes of aluminium gravity die casting (approx. 80 t/month), produced on more than 20 casting machines and in 12 melting furnaces. The value chain covers development, design, prototyping, in-house tool and permanent mould making, CNC machining on 3-, 4- and 5-axis machining centres, surface finishing such as powder coating, anodizing and painting, as well as assembly of complete assemblies. Customers are OEMs, mid-sized companies and small businesses from industries such as mechanical engineering, automotive, rail, sun protection, construction and medical technology; the company delivers throughout Germany and worldwide. The quality management system has been certified to DIN EN ISO 9001 since 1996.
- Site
- Velbert
- Processes
- Aluminium gravity die casting (gravity casting), Steel casting, Stainless steel casting (hand-moulded casting), Grey cast iron (GG), Malleable cast iron (GTW, white malleable iron), Zinc die casting, Manganese hard steel / hard casting / wear-resistant casting, CNC machining 3- and 5-axis machining centres (3D milling)
- Materials
- Aluminium (numerous aluminium alloys), Steel, Stainless steel, Grey cast iron, Spheroidal graphite cast iron/cast iron, Malleable cast iron, Hard casting / manganese hard steel, Zinc
- Certificates
- DIN EN ISO 9001, ISO 9001
- Founded
- 1987
- Industries
- Mechanical engineering, Automotive industry, Furniture industry, Sun protection/shading technology, Construction industry, Quarrying and earthmoving industry
- 01
Consulting, development and design
- 02
Prototyping
- 03
Tool and permanent mould making
- 04
Aluminium gravity die casting / casting via alliance partner
- 05
CNC machining (3-, 4- and 5-axis)
- 06
Surface finishing
- 07
Assembly and system component supply
Materials and Processes
Aluminium alloys
Produced by gravity die casting from 5 g to 60 kg; rapid heat dissipation in the permanent mould produces a fine-grained, dense structure.
Zinc
Zinc die casting for cast parts and accessory components.
Steel casting
Hand-moulded casting with over 200 alloys from unalloyed to highly alloyed, unit weights 0.5 to 3,000 kg.
Stainless steel casting
Hand-moulded casting and small to medium series at the stainless steel foundry in Wetterzeube.
Grey cast iron
Cast to DIN at the alliance partner's foundry.
Malleable cast iron (white malleable iron)
Cast to DIN within the alliance.
Hard casting / manganese hard steel / wear-resistant casting
Wear-resistant cast parts for highly stressed applications.
Brass
Castings and metal goods as a complement to aluminium casting.
CNC milling 3-, 4- and 5-axis
Machining of the cast parts including fully automated measurement on a 3D coordinate measuring machine.
Surface finishing (powder coating, KTL, painting, anodizing)
Rounding off to ready-to-install system components; on request, grease-free delivery via washing systems.
Locations
Velbert (Plant 1)
DEAluminium foundry and administration
- Part weight / size
- 5 g to 60 kg per cast part
- Lot size
- Prototypes to largest production runs
- Materials
- Aluminium alloys, zinc
- more than 20 gravity die casting machines (including new Q1/2024, clamping area 1,000 x 1,200 mm, moulds up to 3.5 t)
- 12 melting furnaces (300–600 kg crucible capacity)
- spectral analysis device
Velbert (Plant 2)
DECNC machining, surface finishing, assembly, warehouse
- Materials
- Aluminium alloys
- 11 CNC 3-/5-axis machining centres (travel paths up to 2,100 x 860 x 760 mm)
- 3 CNC 4-axis machining centres with pallet changer (800 x 800 x 800 mm, 120 tool slots)
- 5-axis machining centre PRO Flex 7 (2024, ø 700 mm, 500 kg workpiece weight)
- fully automated 3D coordinate measuring machine
- washing systems
Wetterzeube
DEStainless steel/steel foundry (Gestaguss-GEW, alliance partner)
- Part weight / size
- 0.5 to 3,000 kg
- Lot size
- Hand-moulded casting up to small and medium series
- Materials
- Steel casting, stainless steel, grey cast iron, malleable cast iron, hard casting
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Aluminium gravity die casting (gravity casting)Casting | – | 2000 mm × 1600 mm × 500 mm | 5 g – 60 kg | Prototypes – largest production runs | Aluminium alloys |
| Steel castingCasting | – | – | 0.5 kg – 3000 kg | Hand-moulded casting – small to medium series | Steel, over 200 alloys from unalloyed to highly alloyed |
| Stainless steel casting (hand-moulded casting)Casting | – | – | 0.5 kg – 3000 kg | small to medium series | Stainless steel |
| Grey cast iron (GG)Casting | – | – | – | – | Grey cast iron |
| Malleable cast iron (GTW, white malleable iron)Casting | – | – | – | – | Malleable cast iron |
| Zinc die castingCasting | – | – | – | – | Zinc |
| Manganese hard steel / hard casting / wear-resistant castingCasting | – | – | – | – | Manganese hard steel, Hard casting |
| CNC machining 3- and 5-axis machining centres (3D milling)Machining | – | 2100 mm × 860 mm × 760 mm | – | – | Aluminium |
| CNC machining 4-axis machining centres with pallet changerMachining | – | 800 mm × 800 mm × 800 mm | – | – | Aluminium |
| Powder coatingSurface | – | – | – | – | Aluminium |
| AnodizingSurface | – | – | – | – | Aluminium |
| Tumble finishingSurface | – | – | – | – | Aluminium |
| PaintingSurface | – | – | – | – | Aluminium |
| PolishingSurface | – | – | – | – | Aluminium |
| KTL coatingSurface | – | – | – | – | Aluminium |
| Electroplating (decorative) / electroplated colouringSurface | – | – | – | – | Aluminium |
| Assembly / system component assembly / assembly of complete assembliesAssembly | – | – | – | – | – |
| Development, consulting, design, prototyping, tool and permanent mould makingEngineering | – | – | – | – | – |
| Fully automated 3D coordinate measuring machine measurement, spectral analysis, inspectionInspection | – | – | – | – | – |
8 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Casting machine (gravity die casting) | – | über 20 | Clamping areas 1000 mm x 1200 mm, moulds/tools up to 3.5 t (new machine Q1/2024) | 2024 (neue | Plant 1, Industriestraße 26, 42551 Velbert |
| Melting furnaces | – | 12 | Crucible capacity 300 kg – 600 kg | – | Plant 1, Velbert |
| 3- and 5-axis machining centres (3D CNC milling) | – | 11 | max. travel paths 2100 mm x 860 mm x 760 mm | – | Plant 2, Haberstraße 8–10, 42551 Velbert |
| 4-axis machining centres with pallet changer (tool magazine 120 slots) | – | 3 | Travel path 800 mm x 800 mm x 800 mm | – | Plant 2, Velbert |
| 5-axis machining centre PRO Flex 7 (18 t, 5-axis simultaneous) | PRO Flex 7 | 1 | Cast part diameter 700 mm, workpiece weight 500 kg | 2024 | Plant 2, Velbert |
| 3D coordinate measuring machine (fully automated) | – | – | – | – | Plant 2, Velbert |
| Spectral analysis device | – | 1 | – | – | Velbert |
| Washing systems | – | – | – | – | Velbert |
Additional services
Reference customers
Quality
The quality management system has been certified to DIN EN ISO 9001 since 1996 (re-certification in 2003 by AEROCERT). Measurement is carried out on a fully automated 3D coordinate measuring machine, materials are analysed by spectral analysis; a reference sample warehouse of approx. 7,000 items ensures traceability.
| Evidence | Velbert | Wetterzeube |
|---|---|---|
| ISO 9001 |
History
- 1986
Ralf Mewes goes into business for himself on 01.02.1986 (double garage).
- 1987
Founding of Metallgießerei Ralf Mewes
- 1991
Takeover of the production of the Nettelbeck/Ostermann foundry
- 1995
Purchase of a plot of land (5,950 m²) in the Röbeck industrial estate
- 1996
Conversion into a GmbH; initial certification to DIN EN ISO 9001
- 1997
Move to a new building (production hall and office wing, 3,850 m²)
- 2001
Expansion of production space to 5,000 m²
- 2002
Extension for toolmaking and high-bay warehouse
- 2003
Re-certification DIN EN ISO 9001:2000 by AEROCERT on 21.02.2003
- 2007
Joining the strategic foundry alliance RM Industries with Gestaguss-GEW Edelstahlgießerei GmbH as of 01.09.2007
- 2009
Kevin Mewes joins the company
- 2014
Kevin Mewes becomes shareholder and managing director (2nd generation)
- 2015
Takeover of production and premises of Grundscheid GmbH (8,500 m²), converted into today's Plant 2
- 2023
Website relaunch (CMS publication)
- 2024
Expansion of casting machine fleet (Q1/2024, clamping areas 1,000 x 1,200 mm) and new 5-axis machining PRO Flex 7 in Plant 2