GKN Sinter Metals is the world's largest supplier of powder metallurgical precision components for the automotive and other industrial sectors. In addition to large-scale press internal parts, GKN also produces additively manufactured components made of metals (SLM, HP BinderJet) and plastics (HP MJF).

Optimal solutions for mold making, model making, prototypes, pre-production, production, assembly

The Grunewald group of companies with offices in Grunewald (headquarters), Grunewald Tools & shapes, Grunewald cast and Grunewald & Partner Rapid Prototyping in Bocholt (D), Grunewald Tooling in Irxleben (D), Grunewald Stade (D) and Grunewald New Technologies GNT (USA ) forms a strategic alliance for toolmaking, mold and model making and the development, design and production of metal components, plastic components and fiber composite parts from the design, through prototyping and pre-production through to the methods of mass production.
Based on our extensive CAD capabilities, we offer the full range of modern techniques for the production of equipment and products. The efficient use of our diverse possibilities with a nearly 100% vertical integration offers compelling advantages in terms of reducing costs and time associated with a very high quality standard.
This results in a high level of satisfaction among our customers. 190 qualified engineers, skilled workers, students and trainees represent the future of our company safe.
CAD / CAE, Engineering
• 3D part design and construction based on the leading CAD / CAM products
• 3D CAD tool and fixture design
• CAE simulation of mold filling and solidification, residual stress, shrinkage and warpage
• FEM calculation
Toolmaking Automotive and Vehicle
• Form, laminating and punching tools for vehicle interior trim
• Teppichverformwerkzeuge
• foam molds
• Umbugwerkzeuge
• Die casting tools
• injection molding tools
• equipment and systems
Tooling aviation
• Lay-up tools for the production of composite parts
• RTM tools
• curing and cutting tools
• equipment and systems
Cast Products
• Model Facilities
• Laser - Sintering
• QMC Rapid Prototyping G

GTK-Prototype UG was founded in 2014 by Tobias Günther and initially dealt with rapid prototyping machines.

Over the years, CNC milling and turning as well as assembly and development work were added due to customer requirements.

GTK-Prototype develops and designs on behalf of customers as well as internally using the most modern CAD systems such as Solid Works, Autodesk Inventor, Fusion 360 and others and inserts them into a comprehensive CAM system.
Through the production of prototypes in medical technology, mechanical engineering and the automotive sector, GTK-Prototype was able to acquire extensive experience in manufacturing.

In 2018, the production option laser cutting was added.

GTK-Prototype is currently based in Neuhausen near Tuttlingen and will move to the newly built company location in Radolfzell in the course of 2022.

GWL is a medium-sized 3D printing service provider that, in addition to the industrial production of prototypes or series, also takes on the development or 3D printing optimization of your projects.

About us
With our industry expertise, we can help you successfully and promptly implement your production project for mechanical components, assemblies, and housings for small to medium-sized series.

For more than 20 years, we have been experts in die casting, injection molding, and other mechanical processes. Our focus is on cross-process thinking.

In Germany, Europe and Asia (in-house certified production) we manufacture your mechanical components, assemblies or housings.

Our manufacturing services include:

Engineering: Technology consulting (wide range of materials and manufacturing processes); CAD evaluation, construction & development

Prototyping (close to series production; 1,-3,000 pieces) for die casting, injection molding, precision casting, sand casting, PA casting, vacuum casting, CNC milling, SLS & SLY

Series production for batch sizes of up to 25,000 units

Metal: aluminum die casting, zinc die casting, deep drawing, gravity die casting, sand casting
Plastics: injection molding, thermoforming, extrusion
Our Services:

Project-related surface finish
Coordination of the entire production project
Advice along the value chain
Assembly service, measurement reports
International logistics service

SC. HCV TECHNOLOGY SRL is a company with full private capital estabilished in 2018, the main objective is “General mechanical operations”.

We have implemented a quality system thet supports quality manufactured products, on time deliveries along with high qualified personnel. The professionalism of the workers is the business card of the company.

We offer the following services: milling, turning, CNC programming, design 3D and 2D and also heat treatment operations done in collaboration.


The range of materials that can be processed are: steel, alloy steel, tool steel, stainless steel, aliminium and aluminum alloys, copper, copper alloys, teflon, polyamide, PVC, polyethylene, etc.



We want long term relationships with our partners.

For offers and orders please contact us at the email address: office@hcv-tech.ro or telephone number +40 769799423 Monday to Friday between 9:00-17:00.

The H & H GmbH offers in its two business units H & H H & H innovation and smart products all the services needed an idea on the way to series production. We develop, build prototypes and simulate, test and then produce the shape idea made in production quantities. A particular strength of the H & H GmbH is the production of products, such as technically sophisticated plastic parts that are needed in small quantities. Our customers come from the industries such as automotive industry and suppliers, medical, bathroom and toilet facilities.

In all stages of the process H & H is exclusively committed to the customer. We provide our expertise available to ensure that your product idea to market success. During the development, we have the later manufacturing processes in mind. We design manufacture and assembly meet and focus when needed at our manufacturing facilities. So we minimize during development cost and achieve the highest quality standards in the later series production.

In recent years, then came the expansion of the plastic molding and an extension of the value spectrum for surface finishing as well as parts and assembly - Since 2009 we provide service & maintenance of photovoltaic-scale plants at

H & H is divided into two business areas:

H & H Innovation:
Is your partner in the product development process

Development: CAD CATIA V4/V5 - NX - Simulations / FE calculations - patent search - assistance in patenting / intellectual property rights management

Prototype: STL / SLS - Vacuum casting - RIM - milling models 3-axis and 5-axis

Testing: wind tunnel - Climatic tests - measurements - stress tests

Pre-series: Teaching and fixtures - Prototype tools and parts - plastic and metal parts - assemblies of assemblies, components and systems

H & H Smart Products
Is your partner for assemblies, components and systems for complex, technical