Foundry in Hamburg for aluminium, bronze, brass and red bronze sand casting of single parts through medium-sized series.
Metallgiesserei Josef Ritter OHG
21033 Hamburg (Kurt-A.-Körber-Chaussee 39f) · Foundry / Head officeNew on Amplifa
The Company
Metallgiesserei Josef Ritter OHG (Ritterguss) is a foundry founded in 1981 in Hamburg-Bergedorf that produces castings using the sand casting process in aluminium, bronze, brass and red bronze alloys. The company casts all common aluminium and copper alloys, including G-AlSi5Mg, G-AlSi9Cu3 and G-AlSi10Mg. Its in-house production depth includes its own pattern and mould making with a pattern-making carpentry shop, sand casting using an airflow moulding press machine and a jolt-squeeze moulding machine, as well as hand-moulded work in various mould sizes, fine grinding and heat treatment (solution annealing and artificial ageing) of aluminium castings, all in-house. With 8 melting furnaces, single parts for new developments and spare-part requirements are produced just as much as small to medium-sized series; 3D-printed sand moulds (via suppliers) and rapid prototyping from 3D data are also offered. Mechanical finishing and surface coating (painting, powder coating) are carried out via suppliers. Served industries include mechanical engineering, plant engineering, vehicle construction, manufacturers of medical devices, mould making, the chemical industry, automotive accessory parts and the restoration of historic buildings. The location is Kurt-A.-Körber-Chaussee 39f in 21033 Hamburg.
- Site
- Hamburg
- Processes
- Aluminium sand casting (sand casting), Bronze casting, Brass casting, Red bronze casting, Hand moulding process (hand-moulded work in various mould sizes), Casting with 3D sand-printed mould, 3D-printed sand moulds (mould parts printed layer by layer from sand, via supplier), Solution annealing and artificial ageing (heat treatment of aluminium castings)
- Materials
- G-AlSi5Mg (aluminium casting alloy), G-AlSi9Cu3 (aluminium casting alloy), G-AlSi10Mg (aluminium casting alloy), Bronze, Brass, Red bronze, Aluminium alloys (general), Copper alloys (general)
- Certificates
- ISO 9001, In-house fine grinding shop (surface finish), In-house heat treatment (solution annealing/artificial ageing)
- Founded
- 1981
- Industries
- Mechanical engineering, Plant engineering, Vehicle construction, Manufacturers of medical devices, Mould making, Chemical industry
- 01
Pattern and mould making (in-house pattern-making carpentry shop)
- 02
Mould production (airflow/jolt-squeeze moulding press machine, hand mould, 3D
- 03
Melting and casting (sand casting in aluminium, bronze, brass, red bronze)
- 04
Heat treatment (solution annealing, artificial ageing of aluminium castings)
- 05
Fine grinding / mechanical finishing and coating (via suppliers)
- 06
On-site assembly
Materials & Processes
G-AlSi5Mg (aluminium casting alloy)
Aluminium casting alloy, e.g. for cylinder heads in sand casting.
G-AlSi9Cu3 (aluminium casting alloy)
Aluminium casting alloy, e.g. for cylinder heads and base bodies in sand casting.
G-AlSi10Mg (aluminium casting alloy)
Aluminium casting alloy, e.g. for housing covers in sand casting.
Bronze
Copper alloy for bronze casting, e.g. column capitals and fence finials.
Brass
Copper alloy for brass casting in various components.
Red bronze
Copper alloy for red bronze casting, e.g. impellers cast in a 3D sand-printed mould.
V2A (stainless steel)
Stainless steel for threaded pins cast into castings (e.g. fence finials).
Galvanized steel
Steel tube with flanges for static reinforcement of aluminium cast columns.
Wrought iron paint finish
Surface finish for historical lantern replicas.
Locations
Hamburg
DEFoundry / Head office
- Part weight / size
- Components from 0,5 kg to 18 kg; cast columns up to ca. 390
- Lot size
- Single parts to medium-sized series
- Materials
- Aluminium alloys (G-AlSi5Mg, G-AlSi9Cu3, G-AlSi10Mg), bronze, brass, red bronze
- Airflow moulding press machine (since 1992)
- Jolt-squeeze moulding machine
- 8 melting furnaces for aluminium, bronze, brass, red bronze
- Pattern-making carpentry shop
- Fine grinding shop
- Heat treatment (solution annealing, artificial ageing)
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Aluminium sand casting (sand casting)Casting | – | – | 18 kg (given as an example) | 1 piece – medium-sized series | Aluminium alloys (G-AlSi5Mg, G-AlSi9Cu3, G-AlSi10Mg) |
| Bronze castingCasting | – | – | – | – | Bronze |
| Brass castingCasting | – | – | – | – | Brass |
| Red bronze castingCasting | – | – | – | – | Red bronze |
| Hand moulding process (hand-moulded work in various mould sizes)Casting | – | – | – | Single part – medium-sized series | Aluminium alloys, Bronze, Brass, Red bronze |
| Casting with 3D sand-printed mouldCasting | – | – | – | – | Red bronze, Aluminium |
| 3D-printed sand moulds (mould parts printed layer by layer from sand, via supplier)Casting | – | – | – | – | Aluminium alloys, Bronze, Brass, Red bronze |
| Solution annealing and artificial ageing (heat treatment of aluminium castings)Heat treatment | – | – | – | – | Aluminium alloys |
| Pattern and mould making / foundry pattern making (in-house pattern-making carpentry shop)Engineering | – | – | – | – | Wood (pattern making) |
| Fine grinding shopSurface | – | – | – | – | Aluminium alloys, Bronze, Brass, Red bronze |
| Welding of casting half-shells (e.g. welded aluminium casting half-shells, cast-in V2A threadedJoining | – | – | – | – | Aluminium alloys |
| Painting (e.g. wrought iron paint)Surface | – | – | – | – | Aluminium alloys |
| Powder coatingSurface | – | – | – | – | Aluminium alloys |
| On-site assembly (e.g. lanterns mounted on the building)Assembly | – | – | – | – | – |
| Rapid prototyping support (prototype models from 3D data sets via partners, STL,Engineering | – | – | – | – | Aluminium alloys, Bronze, Brass, Red bronze |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Airflow moulding press machine (airflow moulding machine) | – | at least 1 | various mould sizes | seit 1992 | Hamburg |
| Jolt-squeeze moulding machine | – | at least 1 | various mould sizes | – | Hamburg |
| Melting furnace (for aluminium or bronze/brass/red bronze) | – | 8 | – | – | Hamburg |
Additional services
Reference customers
Quality
Quality features according to company information are flash-free castings with high surface quality achieved through the use of the airflow moulding machine. The in-house fine grinding shop performs the finishing of the castings.
| Evidence | Hamburg |
|---|---|
| ISO 9001 | |
| In-house fine grinding shop (surface finish) | |
| In-house heat treatment (solution annealing/artificial ageing) |
History
- 1981
Founding of Metallgiesserei Josef Ritter in Hamburg-Bergedorf by Josef Ritter after many years as works manager of the Giesserei Johs. Christensen foundry.
- 1992
Introduction of a modern airflow moulding machine for small to medium-sized unit quantities.
- 2003
Business operations taken over by the founder's sons, Bernd and Joerg Ritter.