
Manufacturer of plastic injection-molded parts with in-house toolmaking and assembly – from prototype to series production.

Horst Gorogranz Kunststofftechnik GmbH
Markt IndersdorfNew on Amplifa
About Gorogranz Kunststofftechnik
Horst Gorogranz Kunststofftechnik GmbH is a manufacturer of plastic injection-molded parts based in Markt Indersdorf near Dachau. The company supports customers from the idea through the prototype to the series part and, in addition to injection molding, offers tool development, design and manufacture as well as the assembly of subassemblies. The machine park comprises 15 injection molding machines with clamping forces of 35 to 210 tonnes, including machines from DEMAG, ENGEL and Haitian as well as a 2K injection molding machine. Handling systems automatically feed insert parts and remove finished parts; fully automatic assembly systems complement production. Part weights of approx. 0.4 g to approx. 425 g are produced, including overmolding and insert parts. The company supplies industries such as automotive, the electrical industry, medical technology, the furniture industry and the packaging industry, and exports to EU countries, North America, China and Mexico.
- Site
- Markt Indersdorf
- Processes
- Plastic injection molding (series and prototype parts), 2K injection molding (two-component injection molding), Overmolding of parts, Injection-molded parts with insert parts, Toolmaking: new construction of series tools, Tool repair and optimization (injection molding tools), Mold-flow analysis, Prototype toolmaking (via partner companies)
- Materials
- Plastics (general, materials not named specifically), Plastic injection molding, Two-component injection molding, Overmolding / insert parts, Toolmaking
- Certificates
- DIN EN ISO 9001:2015, ISO 9001
- Founded
- 1977
- Industries
- Automotive, Electrical industry, Medical technology, Furniture industry, Packaging industry
- 01
Technical support / tool development
- 02
Toolmaking (new construction, repair, optimization, mold-flow analysis)
- 03
Plastic injection molding (prototype and series, 2K, overmolding, insert parts)
- 04
Assembly (ultrasonic welding, bonding, threaded inserts, subassembly assembly)
- 05
Shipping and sales
Materials & Processes
Plastic injection molding
Series and prototype parts with part weights of approx. 0.4 g to approx. 425 g.
Two-component injection molding
Multi-component parts produced on a DEMAG 2K machine with 80 t clamping force.
Overmolding / insert parts
Overmolding of parts and injection-molded parts with insert parts, supported by handling systems.
Toolmaking
New construction of series tools, repair, optimization and mold-flow analysis; prototype tools via partner companies.
Sites

Markt Indersdorf
DEProduction and administration
- Part weight / size
- approx. 0.4 g to approx. 425 g part weight
- Materials
- Plastics
- 15 injection molding machines (DEMAG 35–210 t, ENGEL 100 t, Haitian 60–120 t)
- DEMAG 2K injection molding machine 80 t
- Handling systems for insert part feeding and part removal
- Fully automatic assembly systems
Components




Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Plastic injection molding (series and prototype parts)Plastics | – | – | approx. 0.4 g – approx. 425 g | – | Plastics (not further specified) |
| 2K injection molding (two-component injection molding)Plastics | – | – | – | – | Plastics (not further specified) |
| Overmolding of partsPlastics | – | – | – | – | Plastics |
| Injection-molded parts with insert partsPlastics | – | – | – | – | Plastics |
| Toolmaking: new construction of series toolsEngineering | – | – | – | – | – |
| Tool repair and optimization (injection molding tools)Engineering | – | – | – | – | – |
| Mold-flow analysisEngineering | – | – | – | – | – |
| Prototype toolmaking (via partner companies)Engineering | – | – | – | – | – |
| Ultrasonic weldingJoining | – | – | – | – | Plastics |
| Post-molding installation of threaded insertsAssembly | – | – | – | – | – |
| Mechanical joining of partsAssembly | – | – | – | – | – |
| Bonding of partsJoining | – | – | – | – | – |
| Complete assembly of subassembliesAssembly | – | – | – | – | – |
6 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Injection molding machine | DEMAG | – | Clamping force 35 to 210 tonnes | – | Markt Indersdorf |
| Injection molding machine | ENGEL | 1 | Clamping force 100 tonnes | – | Markt Indersdorf |
| 2K injection molding machine | DEMAG 2K | 1 | Clamping force 80 tonnes | – | Markt Indersdorf |
| Injection molding machine | Haitian | – | Clamping force 60 to 120 tonnes | – | Markt Indersdorf |
| Handling systems for automatic feeding of insert parts and part removal | – | – | – | – | Markt Indersdorf |
| Fully automatic assembly systems | – | – | – | – | Markt Indersdorf |
Additional services
Quality
The production and sale of plastic injection-molded parts are certified to DIN EN ISO 9001:2015 (TÜV SÜD).
| Evidence | Markt Indersdorf |
|---|---|
| ISO 9001 |
History
- 1977
Company founded by Horst and Elisabeth Gorogranz
- 1996
New building in Markt Indersdorf
- 2018
Change of ownership