Welcome to
Hjernø Værktøjsfabrik A/S
(Hjerno Tool Factory)

Hjernø is highly specialized in producing technically demanding injection moulding tools. We have some of Denmark's best production equipment in a strong organization that ensures super high quality at very reasonable prices.

We specialize in finding innovative tooldesign solutions for tools even for very complicated parts, where we also use great precision in our super-modern production facility with tolerances down to 2-3 microns

Hjernø Værktøjsfabrik is one of Northern Europe's largest and oldest tool manufacturers. We were established in 1946, employ around 65 staff and produce an average of one new injection-moulding tool every day.

Innovative tools

On average, we produce one new tool every day. We are specialists in designing and manufacturing technically demanding and powerful injection moulding tools of high quality and at an affordable price. Ultraprecise tolerances and optimised cycle times ensure a great mould economy and high-class plastic parts.


  • April 2021 Watch video: Meet Hjerno's plastics specialist

    At Hjerno, we do not only employ skilled tool makers and capable engineers. We also employ skilled plastic specialists in our in-house test centre with our own injection moulding machines for sample mould of finished samples. One of them is... Read More ...

  • April 2021 From workshop to large factory: Hjerno turns 75

    Hjerno Tool Factory turns 75 this year. And although the physical framework, customers, solutions and not least the production equipment have undergone major changes over the years, there are still a number of common denominators that... Read More ...

  • April 2021 5-axial simultaneous milling machine with extreme precision

    It is a unique machine that has recently moved into Hjerno's fleet of production equipment. As part of our continuous efforts to raise quality and reduce our lead times, we have invested in two additional 5-axial CNC machines from Makino and... Read More ...

  • April 2021 Hjerno increases manning with two new constructors

    Hjerno is strengthening its construction department with two more constructors: René Ravnholdt Knudsen and Frederik Engstrøm, who have both recently joined us. Thus, Hjerno now employs a total of eight constructors. René Ravnholdt Knudsen is... Read More ...

  • February 2021 Meet Hjerno's new CEO

    We have a new CEO at Hjerno. And in this video you can get to know Allan Hansen a little better. Allan Hansen comes with more than 30 years of experience from the plastics industry and has, among other things, been involved in the fields of... Read More ...

  • February 2021 Hjerno Tool Factory has found its new CEO

    Hjerno hires a well-known profile from the plastics industry for the position of CEO. Co-owner and now former managing director Aage Agergaard will continue to be part of the company as head of business development and with close customer... Read More ...

  • January 2021 Watch video: Meet Hjerno’s super planner

    At Hjerno, we have plenty of human processing power in the form of our skilled specialists. However, we also have a single artificial brain that keeps track of all tool pieces in the production – namely our intelligent OrderFlow,... Read More ...

  • January 2021 Hjerno is investing to keep up with growth

    As with most other companies, the Covid-19 crisis and the lockdown during spring also hurt Hjerno Tool Factory. But during the autumn we were fortunately able to observe that the plastics industry has really picked up speed again. In... Read More ...

  • January 2021 Standardised project management pays off

    At Hjerno, project management can be anything from managing a single tool part through production to managing the production of an entire series of tools. For Hjerno's project managers, project management may thus vary from small projects to... Read More ...

Production and technology

We have one of the largest production sites for tool manufacturing in Scandinavia. A production site, which more or less is able to manufacture all tools in-house. Ongoing investments in new technology and new processes enable us to manufacture tools within limited tolerances and at an affordable price.

Innovative solutions at a good price

Innovative solutions at a good price

We are not afraid of complex parts at affordable prices, On the contrary, our work is founded on providing the European plastics industry with excellent, innovative tool solutions that ensure our mutual competitiveness.

Advanced technology

Advanced technology

We specialise in developing tool solutions, which can manufacture the perfect part with all tolerances and surfaces under control - and which will be economically feasible in your moulding department thanks to unmanned operations and short cycle times.

Northern Europe's best employees

Northern Europe's best employees

We have Northern Europe's best employees with more than 60 tool specialists. On top of that, we have at our disposal the latest high-precision hardware, which can manufacture tools with tolerances within 2-3 microns. We can thus reach the target without long and time-consuming adjustments and at the same time guarantee meeting the budget by designing and manufacturing a tool that is just right for the job!

A house of specialists

Our team consists of some of the most competent tool makers, tool constructors and project managers in Denmark. In addition, we have our own technical designers and plastics specialists. This enables us to participate in development projects and advise our customers about parts optimisation and optimal manufacturing of the finished part.