ENGEL is extending the scale of industrial production of large injection-moulded parts by introducing the duo 12000 US, described as the largest injection moulding machine in the world. The new two-platen design with a clamping force of 110,000 kN has been developed specifically for moulds with projected areas greater than 2.5 m² and enables economical production of very large components in integrated processes. The manufacturer points out that the combination of functional integration, reduced number of components and lower assembly effort creates new opportunities for lightweight design and for replacing traditional materials such as metal or concrete with plastics in mobility, infrastructure and industrial applications.
The injection moulding machine was recently commissioned at a customer site. Thanks to its scale and process configuration, it allows large structures to be produced in a single production step, which reduces material consumption, simplifies manufacturing logistics and cuts time and cost. According to ENGEL, this approach also supports an improved carbon footprint over the entire product life cycle, helping users to develop competitive and more sustainable product solutions.
Technical parameters and drive concept
To provide the required shot weights for large-area components, the duo 12000 US is equipped with two injection units operating in parallel. Screw diameters of up to 210 mm enable a shot volume of up to 65,000 cm³ and homogeneous filling of extensive projected areas. A joint project with the customer resulted in the selection of an eight-tie-bar configuration as the solution best suited to its specific requirements. The manufacturer notes that machines of comparable scale can also be designed in a four-tie-bar arrangement.
The system dimensions illustrate the engineering challenge. The injection moulding machine is approximately 24 m long and about 8.4 m high, placing it among the largest industrial production installations in injection moulding worldwide. The total machine weight is 551 t, with a maximum mould weight of 170 t. Around 30 km of cabling were installed during construction. The installed electrical power is around 2.4 MW with a total current of about 2900 A. Despite these physical parameters, the modular concept of the duo series keeps the system as compact as possible, which translates into savings in production floor space.
High vertical integration and test capabilities
ENGEL develops injection moulding solutions of this scale exclusively in response to specific customer requirements. To execute such projects quickly and cost-effectively, the company relies on an extensive modular system and a high level of in-house manufacturing of components. A key role is played by the in-house large machine technical centre, where customers can carry out extensive tests related to process technology and component development.
For large-volume, heavy parts, shrinkage behaviour of the material is a crucial issue. The technical centre provides the capabilities to run iterations and optimise process settings in order to ensure the required quality of the mouldings. This includes adjusting injection parameters, cooling and any special solutions aimed at limiting dimensional distortion.
As the world’s largest injection moulding machine, the ENGEL duo 12000 US enables the cost-efficient production of large-format injection-moulded parts in previously unattained dimensions
ENGEL's experience in building large machines
ENGEL emphasises that it has many years of experience in designing and building large injection moulding machines. In addition to standard configurations of the duo series, several systems with a clamping force of 74,400 kN are already operating on the market. The development of machines in this class has been made possible by a specially developed design concept that enables very large installations to be engineered and manufactured in an organised and repeatable way.
ENGEL's global production structures allow such injection moulding machines to be built, depending on customer needs, not only at the large-machine plant in Austria but also regionally in Asia. Despite their considerable size, these systems are designed to deliver high precision. With options such as injection compression moulding, component dimensions can be defined with an accuracy of a few hundredths of a millimetre, comparable to the thickness of a sheet of paper. The combination of process sensitivity with very high clamping and injection forces opens up new possibilities for precise lightweight structures and for functional integration in large-format components.
Gigamoulding in automotive and new vehicle architectures
In the automotive sector, demand is increasing for gigamoulding solutions for the production of large structural parts. ENGEL points to the influence of megatrends such as electromobility, autonomous driving, platform consolidation and CO₂ reduction targets on technology development. The new process capabilities make it possible to rethink the design of components such as battery housings, underbody panels or hybrid inner door structures.
The objective is to reduce the cost of components while integrating more functions, lowering weight and simplifying assembly. According to the company, these parts can at the same time contribute to stiff and safe body architectures as required by autonomous mobility concepts. Large structural elements manufactured in a single mould cavity make it possible to reduce the number of joints and potential weak points, which is important when designing energy-absorbing structures for crash management.
The large mould space enables flexible automation and the efficient production of complex large-scale components in integrated production processes
New possibilities in technical injection moulding
Large injection moulding machines also open up new application fields in technical injection moulding beyond automotive. ENGEL reports that machines with a clamping force of around 11,000 t have already been successfully implemented, among others for the production of logistics and infrastructure products.
Examples include transport containers for handling end-of-life batteries from e-mobility applications, large-volume infiltration boxes for stormwater management systems and water tanks with mould areas approaching six square metres and shot weights of up to 109 kg. For large water tanks, plastics show clear advantages over concrete. Plastic components are lighter, easier to transport and install, and require less extensive construction infrastructure. At the same time, polymer-based structures respond better to ground movement, while concrete structures may tend to crack when the subsoil shifts.
Such solutions support municipalities and companies in adapting to the increasing frequency of heavy rainfall events and tightening regulatory requirements for water retention. The use of large ENGEL machines enables these products to be manufactured cost-effectively and in new dimensional scales, which is important for designing water management systems in urban areas.
Technological platform for large-scale structures
With the duo 12000 US, ENGEL strengthens its position as a technology provider for large-scale injection moulding. The system is not only a record holder in terms of size and clamping force but also serves as a platform for new process technologies, material substitution and highly integrated component concepts. It enables more sustainable product solutions in mobility, infrastructure and industrial applications, while demonstrating the potential of gigamoulding for industrial production of large plastic structures.
The company stresses that the machine does not represent the limit of what is technically feasible. Based on its design and manufacturing capabilities, ENGEL states that it can realise even larger systems if corresponding customer requirements arise. In this way, the manufacturer creates additional opportunities for plastics processors who aim to produce components in new dimensions cost-competitively and to strengthen their market position in the segment of large injection-moulded products.
