
Development, manufacture and distribution of riser systems and molding material products for foundries
GTP Schäfer Gießtechnische Produkte GmbH
Grevenbroich (Benzstr. 15)New on Amplifa
About GTP Schäfer
GTP Schäfer Gießtechnische Produkte GmbH develops, manufactures and distributes riser systems (risers), auxiliary materials and related accessories for foundries. The product portfolio comprises exothermic and insulating riser sleeves such as THERMO-Riser®, PXT-PKXT-Riser®, POINT-Riser®, ECO-Riser®, FILTER-Riser, FIBRE-Sleeves and ISO-Riser as well as the NET-Technology® with defined break points (NETFrame®, NETCore®, NETSleeve®) for cost-reducing riser removal. In addition, special molding materials such as CERAPEARL 3D for one-piece cores produced by 3D printing are offered. Riser design is supported by application engineers on site; via SimLink®, material and geometry data sets are available for MAGMASOFT® simulation, and the GTP-ToolBox® serves as a digital data manager for foundries. Customers come from the foundry industry, including GF Casting Solutions, Eisenwerk Martinlamitz and VDL Castings Heerlen. Production of customer-specific solutions is possible from a single piece. The location is the Grevenbroich branch (Benzstr. 15), which is certified for development, manufacturing and distribution.
- Site
- Grevenbroich
- Processes
- THERMO-Riser® (riser systems with high customizability, conventional riser system), PXT-PKXT-Riser (highly exothermic riser sleeves for die casting/molding machine lines), POINT-Riser® (highly exothermic risers for molding lines/green-sand molding, smallest contact, ECO-Riser® (modular riser system for confined installation spaces, core packages, adjacent casting, FILTER-Riser / FILTER-Sleeves (gating reduction, yield improvement), FIBRE-Sleeves (conventional riser system for large castings with accessories), ISO-Riser (pinpoint risers for non-ferrous metals), Exothermic/insulating sleeves and lids (knock-in and insert types)
- Materials
- Non-ferrous metals (for ISO-Riser applications), Riser/molding material products (exothermic/insulating, CERAPEARL 3D), Exothermic and insulating riser sleeves and lids, Non-ferrous metals (ISO-Riser applications), Special molding material CERAPEARL 3D
- Certificates
- ISO 9001:2015, ISO 14001:2015
- Industries
- Foundry industry (casting production)
- 01
Application consulting and riser design
- 02
Development of customer-specific solutions
- 03
Manufacture of the riser and molding material products
- 04
Simulation and data interface (SimLink®/MAGMASOFT®)
- 05
Distribution and digital support (GTP-ToolBox®)
Materials & Processes
Exothermic and insulating riser sleeves and lids
Knock-in and insert types for conventional riser systems such as FIBRE-Sleeves.
Non-ferrous metals (ISO-Riser applications)
ISO-Risers enable pinpoint risers for non-ferrous metal castings.
Special molding material CERAPEARL 3D
Molding material for the production of one-piece cores by means of 3D printing.
Locations

Grevenbroich
DEBranch: development, manufacturing and distribution
- Lot size
- From 1 piece (customer-specific solutions)
- Materials
- Exothermic/insulating molding materials, non-ferrous metal applications
Products & Components










Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| THERMO-Riser® (riser systems with high customizability, conventional riser system)Casting | – | – | – | – | – |
| PXT-PKXT-Riser (highly exothermic riser sleeves for die casting/molding machine lines)Casting | – | – | – | – | – |
| POINT-Riser® (highly exothermic risers for molding lines/green-sand molding, smallest contactCasting | – | – | – | – | – |
| ECO-Riser® (modular riser system for confined installation spaces, core packages, adjacent castingCasting | – | – | – | – | – |
| FILTER-Riser / FILTER-Sleeves (gating reduction, yield improvement)Casting | – | – | – | – | – |
| FIBRE-Sleeves (conventional riser system for large castings with accessories)Casting | – | – | – | – | – |
| ISO-Riser (pinpoint risers for non-ferrous metals)Casting | – | – | – | – | Non-ferrous metals |
| Exothermic/insulating sleeves and lids (knock-in and insert types)Casting | – | – | – | – | – |
| NET-Technology® (defined break point between casting and riser, NETCore®, NETFrame®,Casting | – | 150 mm (contact surface, im | – | – | – |
| NETFrame® (efficient removal of gating and side riser systems)Casting | – | – | – | – | – |
| NETCore® (break edge "0", easy removal of large riser systems)Casting | – | – | – | – | – |
| NETSleeve® (maximum riser performance with the largest possible modulus)Casting | – | – | – | – | – |
| Special molding material productsCasting | – | – | – | – | – |
| CERAPEARL 3D (special molding material for the production of one-piece cores by means of 3DPlastics | – | – | – | – | – |
| SimLink® / MAGMASOFT® simulation (data sets for riser design and dimensioning, material-Engineering | – | – | – | – | – |
| GTP-ToolBox® (digital data manager for foundries: riser data, visit reports, sampling,Engineering | – | – | – | – | – |
| Flexible production of customer-specific solutions (from a single piece)Casting | – | – | – | 1 piece | – |
Additional services
Reference customers
Quality
The Grevenbroich branch is certified by TÜV Rheinland according to ISO 9001:2015 (since 1994) and ISO 14001:2015 (since 2002); the scope covers the development, manufacture and distribution of risers and auxiliary materials as well as the distribution of traded goods.
| Evidence | Grevenbroich |
|---|---|
| ISO 9001:2015 | |
| ISO 14001:2015 |
History
- 1994
First certification according to ISO 9001 by TÜV Rheinland
- 2002
First certification according to ISO 14001 by TÜV Rheinland
- 2019
Start of support for the construction of the Kyekyewere Health Centre in Ghana
- 2023
Trade fair appearance at GIFA 2023 in Düsseldorf (12.–16.06.2023)
Awarded the British Foundry Medal