The new headquarters of the Group, which has a history of 165 years of steady growth, serves the business units HF TireTech Group and HF ToolTech Group.

The designing of the new office is tuned to the needs of the Group’s forward march. Direct access from the office facilities to the assembly hall and machine testing area brings all fields of work close together and ensures optimised communication. The established and well proven production unit in Belišće, Croatia remains. Continuous investments in logistics, painting, warehousing and machining under highest economic aspects guarantee state of the art manufacturing.

Back on track

The COVID 19 pandemic and the global lockdown that came with it saw HF being tested hard for its resilience and the capability to help its partners put their production process back on track through its engineering and other services.

“For HF, partnership means to support its valued customers with benefits that will help to keep their production back on track,” says HF TireTech Group Managing Director Dr. Joern Seevers.

HF´s benefits & services for the tyre production are many:

• Technical support for restarting the HF Curing Presses

• Inspection and readjustment of mechanical settings

• Inspection of safety-related components

• Performance check and functional analysis of hydraulic/pneumatic systems

• Software check-up and functionality test

• Close coordination and supply of spare parts

• Individual training for technicians and service people for a smooth and efficient production ramp-up; trainings can take place on customers site or in Hamburg at the Group’s testing press. Virtual support is also available

Dr. Seevers said: “Together with our customers we analyse production processes, optimise, adjust to changed situations, look behind the production and develop new strategies to achieve more flexibility, increase quality, reduce costs and raw material - get into action with a higher level in automation and smart retrofitting and be ready for sustainable tyre production.”

Tandem Mixer technology:

HF takes it to the next level

HF Mixing Group is supplying Tandem Mixers for more than 15 years and has kicked off a revolution in mixing since then. The concept appears to be simple, but all those years of experience have shown that the highest degree of machine engineering has to be combined with extensive process know how to make a Tandem Mixer successful. And a mixing line is only successful if the calculated output and productivity is achieved – combined with a reliability which enables stable production for years.

As matter of fact to develop the process to mix on a Tandem Mixer takes some time and efforts – not to forget the technological know-how of the mixing process itself. HF offers the possibility to accompany this development by offering extensive trials and engineering studies – to shorten the time from ordering a machine up to the point of running in full production.

The goal of a Tandem Mixer is to reduce the specific cost of mixing a compound – on many occasions, HF has proven that overall cost reductions of 15% can be achieved compared to standard lines with a single mixer. This, in between other, is achieved by reducing the mixing steps for a PCR compound from 2,5 to 1,5 steps.

But productivity is not the only driving factor to invest in a Tandem Line – the quality of the compound overall and specifically constant and repeatable mixing of modern compounds is to be ensured. To optimise dispersion, distribution, temperature control and process stability makes a significant difference in today’s production of more complex compound recipes. The intermeshing mixers produced by HF and used in a Tandem Line guarantee to meet these requirements more than any other mixers on the market.

Experiences have shown that no compromise on quality can be made – and HF is supporting this approach with delivering a control system for Tandem Lines which enables their customers to not only run the machine efficiently but also uses online condition monitoring to always reflect on a reliable compound quality which is repeatable.

HF emphasises on result driven production concepts for its customers – further innovations in terms of integrating industry 4.0 solutions to the mixing process are on its way and the focus is clear: Intelligent machines will integrate new digital solutions into the mixing process and will ensure to meet the expectations of the future.

Brownfield projects

The COVID pandemic put a stronger focus on replacing existing machines instead of adding new capacities to a production plant. Also, productivity as well as sustainability aspects are driving many tyre companies to have a closer look to the installed base.

But inspecting a mixing line which has run for more than 15 years (or sometimes even 25 years) brings to light what challenges may come up if this line will be replaced by a new one. Output values need to be increased, a new mixer technology should improve the quality of compounds, modern automation solutions should support the daily production procedures and increase process stability – many more requirements should be met. One of the largest challenges is limited space when looking at an upgrade of machinery.

Not only the pure space but also intralogistics within a mixing line can create headache – from upstream equipment feeding a mixer all the way to downstream machinery processing the batch further – many modern solutions can be used today but looking at the available space installing them is the challenge.

With a clear focus on such brownfield projects, HF has managed several conversions from old to new with unmatched success. A key in such projects is the planning and pre-engineering process. Starting with an inspection of not only the mixer but all surrounding factors in the building – considering also the material flow – and then continuing with a 3D- scan of the existing equipment including pipe and cabling routing the basis for planning can be laid. Supported by this 3D-scan HF engineers plan and design with 3D models the complete mixing mill room.

By keeping the existing machinery as the base layer and inserting new equipment in an over-lay collisions of steel constructions, limitations in space and optimised pipe and cable routing can be identified. Furthermore, an improved process flow chart is the basis of planning material flow, work processes and even manpower to operate the new mixing line. Finally, new controls and automation solutions – on the basis of industry 4.0 – will improve operating and monitoring the equipment.

One of the largest benefits using HF’s Pre-Engineering is shortening the planning and execution time – and last but not least the reduction of financial funds is possible by starting up the new line much quicker compared to the conversion of lines in earlier years.

Safety first

Supporting all major tyre manufacturers with mixing technology HF constantly strives for improving operational procedures in the mixing mill room. When it came apparent that the variety of compounds increased more and more – driven by many more types and technologies in tyres today – the changeover times from one recipe to the other was put in the focus of operational optimisation. Not only flexible automation solutions are required but also quick availability of the mechanical equipment after the last batch of the current recipe was dispatched. In between other HF identified the cleaning of the mixing chamber as a critical action during changeover in two aspects: First it needs to be safe for the maintenance personal to enter the mixing chamber and secondly time can be saved if the access to the chamber can be optimized.

In order to meet both requirements HF’s engineers designed a maintenance box, the so-called mBox©, which is mechanically integrated directly underneath the mixer – combining the mixer with the chute of a dump extruder for example.

In the moment the mixing line is switched to cleaning mode and all movements of parts are blocked a moveable platform – the floor of the maintenance box – is inserted horizontally underneath the mixer. A door of the box can be opened, and maintenance personnel can enter the box safe and secure, standing underneath the mixer with easy access to the mixing chamber.

Besides the safe working environment customers from HF have noticed saving time and having the opportunity of even inspecting the mixing chamber easier and more frequent during a changeover.

Especially in new installations of a mixing line the mBox© can be integrated in the design of the line easily and right from the start – benefitting the safety and operation of the line daily.

HF Screw Presses

The production of screw presses is one of HF`s core competences for decades. The screw press has gained recognition during its affiliation with KRUPP. Thus, the presses operate all over the world and more than 2.500 presses are installed in various industries for example the edible oil industry, biomass technology and rendering. And, most interesting for the tyre industry, the presses accomplish benchmarking results in the dewatering of natural and synthetic caoutchouc. As a more efficient and space saving solution instead of band dryer systems or similar the screw press has its strong eligibility in dewatering process.

HF Curemaster

HF brought the first hydraulic column type curing press to the tyre industry in 1997. Since then, it continued to develop this product to meet the demanding requirements of its customers.

The HF Curemaster was launched two years ago and since then the patented truck tyre curing press has been successfully installed in multiple locations and in efficient operation. The press provides a flexible and compact footprint, making it possible to replace older presses with potentially more presses per existing trench.

The HF Curemaster also focuses on optimising energy efficiency to ensure the lowest total cost of ownership in the curing plant. The HF Curemaster´s hood design incorporates insulation inside the hood to provides the best insulation effect. In addition, the HF Curemaster provides an extremely fast cycle time to minimise the overall amount of heat loss during the open and close sequence of the press.

HF PCR Design

Delivering for a new greenfield plant is relatively straightforward. However, HF understands the important need of the replacement market as well. It is important to be flexible to meet all the varying trench layouts (pit, shelf, pitless, and so on). Equally important is the need to be able to replace existing 42” – 45” old mechanical presses with 48” – 52” modern presses in order to meet the growing demand for larger tyre sizes.

All replacement projects are analysed carefully together with customers. Attention is paid closely to all details related to operation, maintenance access, mould & bladder change requirements as well as all local safety regulations. HF´s long experience with curing presses provides a large variety of modular options to be used for finding the optimised fit for each specific request.

HF Stack Passenger Car Inflator (PCI)

The requirement for post cured tyres continues to grow in the market and HF has designed a simple and compact solution that can be incorporated in all HF presses as well as behind most all existing older presses.

The patented HF Stack PCI design allows for the PCI to be integrated into even the tightest footprints. This solution eliminates any movement or rotations of the PCI body itself and greatly reduces the amount of moving mechanical components and maintenance.

HF Digitalisation

HF recognises the important trend of digitalisation for the tyre manufacturers and has developed reliable, customised software solutions for machine data communication between machine control and customer IT systems. The main steps were to focus on MES, SCADA and Recipe Management interfaces.

HF Smart Curing enables customers to get started quickly and effectively with a future-oriented digitisation solution. The main advantage in this case is that software for machine data acquisition is supplied directly by the supplier and not by IT service providers.

OPC server technology and efficient network solutions are tailored to the machine enable secure data acquisition. This software can provide feedback in regard to condition monitoring, diagnostic function, machine services, energy monitoring and remote service.

The benefit of connecting your equipment with digitalised solutions clearly accelerates a target-oriented development and improves the Total Cost of Ownership of the equipment.

The Tire and Rubber Association of Canada (TRAC) has launched Member Spotlight Series, a new monthly initiative designed to profile the diverse organisations and leaders within the nation's tyre and rubber sector. The programme offers comprehensive examinations of member companies, covering their business models, technological advancements, environmental strategies and corporate philosophies.

Pirelli is the first company to be featured, with its profile providing insight into its leadership approach and industry contributions. Subsequent spotlights will be released monthly through TRAC’s digital platforms, including its official website, newsletters and social media channels, with each instalment detailing products, strategic goals and recent achievements.

By sharing these narratives, TRAC intends to bolster member connections and highlight the sector's role in Canada's economy and ecological progress. The series further aims to encourage knowledge exchange and collaboration, allowing members to share best practices and elevate awareness of the proficiency present within the domestic tyre and rubber industry.

Carol Hochu, President and CEO, TRAC, said, “One of TRAC’s greatest strengths is the expertise and leadership found across our membership. The Member Spotlight Series celebrates the companies and people shaping our industry while helping share the stories of innovation, advanced manufacturing, sustainability and collaboration that define Canada’s tyre and rubber sector.”

TyreSafe has announced a new alliance with Logistics UK, marking a significant step in uniting efforts to enhance road safety, promote sustainable transport and disseminate best practices within the freight and haulage industry. This collaboration formalises the mutual dedication of both organisations to address critical safety challenges facing UK's transport networks.

Logistics UK, a prominent membership association representing over 21,000 enterprises, encompasses the breadth of the supply chain, including road, rail, water and air freight. Its extensive network accounts for nearly half of the national lorry fleet, comprising more than 200,000 vehicles. Through advocacy, training and compliance support, the organisation is instrumental in maintaining secure and efficient supply chains, making it a pivotal partner for TyreSafe's safety initiatives.

The partnership underscores the growing recognition of tyre management as a cornerstone of modern logistics, impacting not only vehicular safety but also operational costs and environmental footprints. Data indicates that a majority of tyres on UK roads are underinflated, leading to approximately GBP 1 billion in annual fuel waste and accelerating tyre degradation. Furthermore, tyre defects are a primary cause of MOT failures, with over two million infractions recorded yearly, and they contribute significantly to roadside breakdowns and motorway incidents.

For commercial fleets, the stakes are particularly high, as proper inflation and tread depth are directly linked to fuel economy, emissions reduction and cost efficiency. As part of this joint effort, TyreSafe will promote its specialised, vehicle-specific safety resources, offering tailored guidance for HGVs, vans and cars. This educational push aims to empower drivers and operators with the knowledge to conduct effective tyre checks, thereby mitigating risks and supporting the logistics sector's sustainability and operational goals.

Stuart Lovatt, Chair of TyreSafe, said, “We are delighted to be partnering with Logistics UK, an organisation that shares our commitment to safer, more sustainable and more efficient transport. Tyres and their maintenance absolutely fundamental to fleet safety and performance. This partnership allows us to extend vital tyre safety messaging to a broad and influential logistics audience at a time when operators are balancing safety, compliance, cost pressures and sustainability ambitions. By working together, we can help ensure tyre safety remains firmly on the agenda across the sector.”

Arthur Gribbin, Engineering Policy Lead at Logistics UK, said, “Efficient logistics depends on vehicles operating safely, legally and reliably. Tyres play a critical role in achieving this, influencing everything from vehicle safety and fuel efficiency to downtime and environmental impact. By partnering with TyreSafe, we are helping ensure our members and the wider logistics community have access to trusted information and practical guidance to support safer and more sustainable fleet operations.”

Continental has significantly broadened its Gravity mountain bike tyre lineup by introducing 13 new combinations, thereby offering riders extensive customisation options for aggressive trail riding, enduro racing and downhill disciplines.

The expanded portfolio now includes novel size, casing and compound pairings for the Argotal, Kryptotal Front, Kryptotal Rear and Xynotal models. Additional Trail Soft and Enduro SuperSoft variants are available for 29-inch and 27.5-inch wheels, while the trusted mixed-conditions tread remains accessible for 20-, 24- and 26-inch sizes.

This strategic enlargement underscores Continental’s dedication to providing gravity riders with tailored flexibility in balancing grip, control, durability and rolling efficiency. The Enduro casing with SuperSoft compound offers peak traction for demanding trails, whereas the Trail casing with Soft compound delivers a stable and durable option for aggressive riding.

Alexander Haenke, Product Manager for MTB & Gravel at Continental Tires, said, “MTB riders have very different needs depending on where and how they ride. With these 13 new tyre combinations, we are giving riders even more ways to find the perfect balance of grip, control and durability for their individual setup. Whether they are racing enduro, pushing their limits on technical trails or simply looking for maximum confidence on the descents, our expanded Gravity range offers the performance and flexibility they need.”

AZuR partner Hofdmann Runderneuerungstechnik GmbH, based in Wittmund, has announced a significant expansion of its operational capabilities. The company, already well-known for its cold retreading services, is now integrating hot retreading for truck tyres into its production portfolio. This development follows the recent extension of the firm’s ECE R109 approval, and the first batches of hot-retreaded commercial vehicle tyres are already in production and entering the market.

This strategic move broadens Hofdmann’s technical expertise within the retreading sector and reinforces the tyre circular economy across Germany. As a longstanding member of the AZuR network, the company contributes deep knowledge in tyre repair, casing management and retreading processes. The addition of hot retreading complements the prevalent cold retreading method used in the commercial vehicle industry, offering enhanced options for specific tyre designs and applications, while both methods aim to extend the lifecycle of premium casings.

By diversifying its production programme, Hofdmann demonstrates that industry players are actively investing in retreading technologies and strategically scaling existing operations. This expansion not only bolsters the sector’s competitive position but also ensures a more reliable supply of retreaded tyres for fleet operators and commercial end-users. The process involves meticulous inspection of high-quality used casings before applying a new tread, significantly prolonging tyre usability prior to eventual material recovery or recycling.

The company’s capacity growth coincides with broader AZuR initiatives, including a recently launched European project group designed to strengthen collaboration among businesses, research bodies and value-chain stakeholders. With approximately 90 network partners, AZuR continues to pioneer solutions for maximising tyre usage and recovering raw materials. Hofdmann’s latest investment underscores that retreading remains a vital and enduring component of this sustainable industrial evolution.

Christina Guth, Network Coordinator of the Alliance for the Future of Tires (AZuR), said, “Every investment in retreading strengthens the European tyre circular economy. By expanding its hot retreading capabilities, Hofdmann is broadening its offering and creating additional opportunities to keep high-quality commercial vehicle casings in circulation for longer. This sends an important signal to the entire industry.”