Rubber presents a challenge for optical-based measurement sensors. By nature, the black surface is difficult to capture reliable data from and accurately measure. This challenge is often intensified by the complex shapes into which rubber derivatives are extruded or molded.

As a solution to this challenge, 3D laser sensor manufacturers have optimised the design of their sensors to successfully implement scanning and quality control functions for both in-process and final product inspection applications in rubber and tyre manufacturing.

3D laser scanning

Rubber material comes in two forms on the production line, either as fresh and uncured from an extruder or a calender, or as a finished product (e.g., vulcanised tyres). Non-contact 3D laser scanning offers the most practical solution for inspection of both of these rubber material types.

Here’s why:

1. The soft, gummy nature of the rubber makes contact-type measurement ineffective. This measurement approach is also too slow to keep up with the high-speeds of continuous web material production.

2. 2D sensors require complex lighting to see black-on-black contrast. In some applications the lighting is placed underneath the material (e.g., when measuring the width of a strip), and hot sticking rubber can contaminate the lights. In addition, 2D can’t produce measurements related to object geometry (i.e., 3D shape), which means they are unable to measure critical features such as object flatness, surface angles, or part volumes, and are limited to contrast-based inspection. This makes 2D sensors a poor solution for scanning complex shape-based features on dark surfaces, or for operation in low lighting conditions.

          3. In comparison, 3D laser sensors are contrast invariants and generate high-resolution scans regardless of the material or lighting conditions. They also capture the complete 3D geometry of the scan target, including critical depth measurements on surface features such as grooves in a tyre tread. 3D laser sensors are also able to achieve the high speeds required for continuous web material scanning.

Laser profile sensors provide an ideal solution to both in-process and final rubber and tyre measurement and quality control applications. Built-in measurement tools for strip positions, including multiple groove location and depth measurement monitoring with automated alignment enable engineers to configure setup parameters––without requiring any measurement software development.

In addition, the ability to store multiple geometry configurations in the sensor makes changes between different recipes quick and simple, which is critical in minimising downtime for operations that make model changes multiple times per shift.

Application examples

1. In-Process Inspection

Extrusion Profiling with High-Resolution Gocator® 2440 Laser Profiler

Extruding rubber in a specific shape makes up the tread portion of a tyre. Measurement of the extrusion profile is carried out in-process, correcting the extrusion parameters in real-time to maintain the required shape. Key measurement parameters include thickness, width, and profile. Another required sensor capability is monitoring the position of surface features, such as ridges, center lines, and edges.

Profiling these tread extrusions is done by using 3D laser sensors to scan across the extrusion, generating a profile to which built-in measurement tools and pass/fail decision-making logic can be applied.

In this example, two Gocator 2440 laser line profilers are used to measure the rubber web’s extrusion groove pattern, geometry, and location with an X resolution down to 13 microns. Gocator 2440 sensors are able to inspect multiple grooves in a single setup, and groove measurements are unaffected by changes in surface angle relative to the sensor.

Most importantly, Gocator 2440 sensors generate critical 3D height data for robust shape measurement. 2D solutions are limited to contrast-based inspection.

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3. Final tyre inspection

Tyre Sidewall Inspection with High-Speed Gocator 2530 Laser Profiler

Traditional methods for measuring tyre sidewalls for defects such as bulges and dents suffer from too many false rejects (i.e., classifying a good tyre as defective). Due to measurement system limitations, many manufacturers have no choice but to “oversensitise” their sidewall bulge and dent measurement systems, resulting in costly manual inspection requirements for all rejected tyres.

In fact, some measurement systems cannot even distinguish between bulges or dents. However, with state-of-the art laser measurement precision and advanced built-in software analysis, false positive rates can be substantially reduced and, in many cases, eliminated altogether.

Using a Gocator 2530 laser profiler the engineer is able to generate full surface point cloud geometry data in order to detect small defects (down to 28 microns X resolution) anywhere on the sidewall surface. The sensor also delivers complete scan, measurement, and control at 4 kHz, allowing engineers to meet stringent cycle time requirements––with no need for industrial PCs or external controllers.

In this configuration, two profile sensors are typically used, one for each sidewall (top and bottom buddy system). A third sensor is often used to monitor radial runout of the tread.

Leveraging 3D Laser Scanning and Inspection

Laser-based laser triangulation sensors meet the high speed and high resolution requirements for accurate rubber and tyre measurement. These sensors are used in a variety of in-process and final inspection applications, including extrusion profiling and tyre sidewall inspection.

Adding 3D laser sensors for automated quality control is vital to reducing scrap and rework, and improving final product quality by maintaining consistency throughout the tyre manufacturing process.

Courtesy of LMI Technologies www.lmi3d.com

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ZF has secured a significant milestone in the Indian automotive sector, receiving three major orders for its advanced test systems. The contracts, which encompass battery, tyre and e-axle testing, position the global driveline and chassis technology leader at the forefront of the nation’s drive to enhance road safety and establish more robust vehicle certification processes. This development aligns with India’s accelerating regulatory efforts to ensure that vehicle testing becomes more independent, rigorous and comprehensive, marking a critical step forward for the industry.

A key aspect of ZF's strategy involves a strong commitment to local manufacturing, with the company emphasising high levels of domestic content for its test systems in support of the ‘Make in India’ initiative. The firm’s extensive background in the field is underscored by its experience in testing over 100 million transmissions, a testament to the proven global reliability of its technology. This foundation of expertise is now being applied to address the specific safety and performance demands emerging in the Indian market.

With the rapid adoption of electric vehicles, battery safety has become a paramount concern, and ZF’s solutions cover the complete spectrum from individual cells to complete packs. These systems evaluate performance, endurance and environmental factors, including rigorous mechanical abuse testing, while adhering to a wide array of international and Indian standards. Furthermore, the company’s tyre testing capabilities are poised to play a crucial role as India prepares to enforce new mandatory regulations, including the BNVSAP and the AIS 142 TPMS Mandate. The ZF Tyre Efficiency Tester (TET.lab), recognised for its precision, offers a modular platform capable of testing everything from motorcycles to heavy commercial vehicles.

The company’s e-mobility test benches feature a high-performance drive module with a flexible, modular architecture designed to accommodate both conventional and electric drivetrains. These systems can be configured for various operations, integrating frequency converters and precision measurement technology for comprehensive testing. ZF’s deep expertise, already deployed by manufacturers and testing authorities worldwide, positions it as a key technology partner for India. As regulatory requirements tighten and the demand for quality escalates, the company is set to support the nation's ambition of building a safe and sustainable automotive ecosystem.

Akash Passey, President, ZF Group India, said, “Testing agencies are the final arbiters of vehicle safety, the bodies whose certification regulators and the public trust. Being chosen across three independent and Government agencies, for three distinct testing disciplines, is a powerful validation of ZF's accuracy, reliability and deep understanding of India's regulatory and testing landscape. ZF Group is proud to provide the technical foundation that makes world-class automotive safety infrastructure possible in India, not just for our OEM customers but also for Government and independent testing agencies.”

Thomas Trebitsch, Vice President, ZF Test Systems and Testing, said, “Over the past years, we have been focusing on the tyre industry in India and introducing our complete product portfolio to India. As the market develops rapidly towards regulations and safety, there is a strong need for robust and world-class testing technology. ZF brings its global competence and a deep understanding of the Indian auto industry to address its specific needs.”

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As India’s industrial sector accelerates its shift towards cleaner energy, tyre manufacturers are emerging as a critical test case for integrating renewable power into continuous, high-load operations. In this conversation, Kuldeep Jain, Founder and Managing Director of CleanMax, outlines how demand from companies such as CEAT and Michelin is reshaping renewable procurement – from conventional solar contracts to hybrid, round-the-clock solutions – while positioning clean energy as both an operational necessity and a strategic lever for decarbonisation.

Industrial decarbonisation in India is entering a more operational phase, where renewable electricity is no longer a peripheral lever but an embedded component of manufacturing strategy. For CleanMax, this shift is most visible in energy-intensive sectors such as tyre manufacturing, where continuous processes, global supply-chain pressures and ESG commitments are converging to reshape how power is procured and consumed.

Kuldeep Jain, Founder and Managing Director of CleanMax, describes a market moving beyond cost arbitrage towards structural integration of clean energy. Demand from tyre manufacturers – long characterised by high, stable electricity loads – is now influencing both project design and procurement models, pushing developers towards hybrid and round-the-clock renewable solutions. 

Energy-intensive industries are increasingly prioritising renewable electricity to manage power costs and reduce operational emissions. Manufacturing sectors with continuous loads are particularly suited to long-term renewable procurement models such as group captive and open-access PPAs, which provide cost stability while supporting decarbonisation goals,” Jain says.

That demand is already translating into project pipelines. CleanMax’s collaboration with CEAT involves developing 59 MW of hybrid wind-solar capacity to supply renewable power to its Halol and Kanchipuram plants. Similarly, its engagement with Michelin includes an open-access solar power purchase agreement supporting operations at the company’s Chennai facility.

“These projects illustrate how large industrial consumers are integrating renewables into their long-term energy strategy. For instance, globally, the International Energy Agency has already noted that industrial electrification and renewable procurement will drive the next phase of the energy transition. Tyres are firmly in that wave,” Jain notes.

FROM INTERMITTENT SUPPLY TO ENGINEERED RELIABILITY

Tyre manufacturing presents a distinctive challenge for renewable integration. Plants operate continuous processes – mixing, curing and vulcanisation – that require stable baseload electricity and thermal energy. Traditional solar PPAs, while cost-effective, are inherently intermittent, limiting their suitability for such operations.

The industry is therefore evolving towards hybrid models that combine multiple renewable sources. “Hybrid projects are gaining traction because they smooth generation across the day, improving plant load factors,” Jain says. According to the International Renewable Energy Agency, such hybrid systems are among the fastest-scaling formats for industrial decarbonisation.

“As a result, the industry is moving beyond single-source solar PPAs towards wind-solar hybrid projects and open-access group captive models that provide higher plant load factors and more balanced generation profiles across the day. Wind-solar hybrid is increasingly seen as the most practical and efficient pathway to scale renewable penetration in continuous manufacturing environments,” Jain explains.

This shift reflects a broader reframing of renewables – not as intermittent substitutes for fossil fuel power but as engineered systems tailored to industrial demand curves. The emphasis is on aligning generation profiles with consumption patterns, rather than expecting operations to adapt to variable supply.

SECTOR-SPECIFIC DECARBONISATION PATHWAYS

Not all heavy industries decarbonise along the same trajectory. Jain draws a clear distinction between tyre manufacturing and sectors such as cement or steel, where process emissions form a significant share of the carbon footprint.

“If you step back, industries don’t decarbonise in the same way because they don’t consume energy in the same way. A tyre plant is largely powered by electricity. So if you clean up the electricity, you’ve already addressed a meaningful part of its emissions,” he says.

However, the challenge lies in reliability. “These are continuous operations. They don’t switch off when the sun sets or the wind drops. That’s why hybrid becomes important, as a way of shaping energy to demand,” Jain adds.

“In case of cement or steel, a significant portion of emissions comes from how the product itself is made. So the shift we’re seeing is subtle but important. It’s about redesigning the energy profile itself so that clean energy isn’t intermittent in theory but dependable in practice,” he continues.

The implication is that electrification-driven sectors such as tyre manufacturing can achieve faster decarbonisation gains through renewable procurement, provided supply reliability is addressed through hybridisation and system design.

ESG, PRODUCT STRATEGY AND COMPETITIVE POSITIONING

Renewable energy is also assuming a more strategic role within tyre companies’ ESG frameworks. What began as a cost-management exercise is increasingly tied to product innovation, sustainability reporting and global competitiveness.

“The conversation around renewable energy in the tyre industry has clearly evolved beyond cost optimisation. Many manufacturers are increasingly integrating renewable power into their broader ESG strategies and supply-chain decarbonisation commitments, particularly as global automotive OEMs push for lower-carbon sourcing across the value chain,” Jain says.

This transition is evident at the product level. CEAT’s launch of its SecuraDrive CIRCL tyre – produced with up to 90 percent sustainable materials – signals how manufacturers are aligning product design with sustainability objectives.

“Renewable electricity procurement helps reduce Scope 2 emissions and supports the development of lower-carbon products, which is becoming an important factor in both sustainability reporting and global competitiveness. As a result, renewable energy is now seen not only as a cost-management tool but also as a strategic lever for product decarbonisation and ESG positioning,” Jain explains.

TECHNOLOGY MIX AND OPERATIONAL ALIGNMENT

From a systems perspective, no single technology provides a complete solution. CleanMax advocates a portfolio approach that combines generation assets with digital tools and flexible contracting structures.

“A portfolio approach works best. For manufacturing operations with steady electricity demand, hybrid renewable systems combining solar and wind have proven effective, as the complementary generation profiles improve overall availability and plant load factors,” Jain says.

Digital energy management platforms play a supporting role by optimising dispatch and aligning supply with consumption patterns. Flexible procurement structures, including open-access and group captive models, further enhance adaptability across sites and regulatory regimes.

“In practice, hybrid setups combining solar and wind have proven effective because they smooth generation across the day and improve overall availability. That’s what makes renewable power usable at scale,” Jain adds.

The CEAT and Michelin projects exemplify this approach, integrating multiple procurement pathways – onsite solar, offsite generation and open-access PPAs – to increase renewable penetration without compromising operational stability.

POLICY VARIABILITY AND MULTI-LOCATION STRATEGIES

India’s regulatory landscape remains heterogeneous, with state-level policies shaping the feasibility and economics of renewable procurement. For tyre manufacturers operating across multiple locations, this creates both complexity and opportunity.

“Overall, the ecosystem is steadily evolving to support higher renewable penetration practically. Open-access mechanisms are becoming more aligned with industrial needs. Renewable procurement is naturally becoming more location-specific,” Jain says.

Different state frameworks enable companies to tailor their energy mix – combining onsite solar with offsite wind or solar depending on regional resource availability and regulatory incentives.

“In practice, this leads to more balanced and resilient energy portfolios. This is also where developers with experience across markets can add value by structuring solutions that are aligned to each site’s load profile, regulatory context and long-term cost objectives, rather than taking a one-size-fits-all approach,” Jain explains.

GLOBAL SUPPLY CHAINS AND RISING EXPECTATIONS

Pressure from global automotive OEMs is accelerating the adoption of renewable energy in India’s tyre sector. As manufacturers integrate more deeply into international supply chains, emissions performance is becoming a criterion for sourcing decisions.

“As tyre manufacturers become more integrated with global OEM supply chains, expectations around emissions are becoming more defined. Renewable electricity is one of the more immediate ways to address this, especially for Scope 2 emissions,” Jain says.

“What we’re seeing is more about alignment – companies are adapting their energy mix to stay relevant in global markets, where sustainability is increasingly part of how sourcing decisions are made,” Jain says.

This dynamic is likely to intensify as OEMs tighten decarbonisation targets and extend accountability across their value chains, reinforcing the role of renewable energy in industrial competitiveness.

THE NEXT FRONTIER: TRACEABILITY AND CARBON MARKETS

As companies move towards net-zero targets, the focus is broadening beyond direct emissions to include value-chain impacts and verification mechanisms.

“Instruments such as renewable energy certificates and carbon markets help companies transparently account for the renewable electricity they procure. At the same time, there is growing focus on Scope 3 reporting as manufacturers work to address emissions across their broader value chains and align with global supply-chain decarbonisation expectations,” Jain says.

Traceability – ensuring that renewable energy claims are verifiable and auditable – is expected to become increasingly important, particularly for export-oriented manufacturers facing stringent disclosure requirements.

A DECADE OUTLOOK: ACHIEVABLE, BUT CONDITIONAL

Looking ahead, Jain is cautiously optimistic about the pace of renewable adoption in India’s tyre manufacturing sector. The fundamentals – declining costs, expanding capacity and supportive policy evolution – are largely in place.

“Over the next decade, higher renewable penetration in tyre manufacturing is well within reach, especially as clean power availability continues to expand. For electricity-led operations, increasing the share of renewable energy is already a practical pathway, not a distant target,” he says.

However, execution will hinge on system-level factors. “What will make the difference is how reliably this power can be integrated at scale – through consistent open-access frameworks, stronger grid alignment, and wider use of hybrid solutions that better match continuous industrial demand,” Jain says.

The trajectory is clear: renewable energy in tyre manufacturing is transitioning from opportunistic adoption to structural integration. For developers such as CleanMax, the challenge – and opportunity – lies in engineering solutions that convert intermittent resources into dependable industrial infrastructure.

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Wallace Instruments, a globally recognised leader in rubber testing equipment, has expanded its United Kingdom-manufactured specimen preparation lineup with the launch of the WAS3 Pneumatic Cutting Press. The new device joins the company’s range of rubber testing equipment.

Unlike manual cutting methods, pneumatic systems apply consistent force on every cycle, eliminating operator fatigue and variability. Poorly prepared specimens with uneven edges or internal stress can compromise test accuracy, while the pneumatic approach also reduces repetitive physical strain, supporting technician wellbeing during long production runs.

The WAS3 prioritises safe single-operator use through a two-button activation system requiring both buttons to be pressed within half a second, preventing any hand contact with the cutting area. Additional three-sided protective guards further enhance operational safety.

Delivering 15 kN of cutting force, the press easily cuts through 10-mm thick, 95 Shore A rubber sheet using five bar of filtered air pressure. It works with existing Wallace cutting dies, so laboratories can integrate the unit without replacing current tooling, and its compact footprint suits both lab and production environments.

Chris Norval, Managing Director, Wallace Instruments, said, "Specimen preparation is the foundation of accurate rubber testing. With the WAS3, we focused on practical safety, dependable cutting performance and drop-in compatibility. Labs get a compact pneumatic press that fits the air lines already in place, uses their current Wallace dies and delivers consistent results for every operator – because when specimen quality is controlled, you can have confidence in the results that follow."

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DUNLOP (company name: Sumitomo Rubber Industries, Ltd.) has teamed up with Fujitsu Limited to create an artificial intelligence (AI) surrogate model that predicts tyre performance rapidly and with high precision. The breakthrough was validated in a proof of concept tied to DUNLOP’s digital transformation strategy. When applied to tyre deformation upon road contact, the technology slashed analysis time by 90 percent, from 45 minutes to just 5 minutes while processing nearly 600,000 mesh elements.

Based on these results, both firms will build a design support tool, aiming for deployment at DUNLOP by April 2027. The system runs on FUJITSU MONAKA, a next-generation energy efficient Arm-based CPU.

Tyre design typically relies on finite element method (FEM) analysis, where finer mesh grids boost accuracy but increase calculation time and costs. To tackle this, the partners developed an AI surrogate model that solves FEM equations using past data. The model, based on the Graph Neural Network algorithm, predicted contact shape with 87.7 percent accuracy, enabling faster decisions and lower costs.

Select findings will be shared at the 31st Computational Engineering Conference starting 3 June 2026. By December 2026, both companies will test the model on a FUJITSU MONAKA prototype to refine speed and power use.

Under its long-term strategy R.I.S.E. 2035, DUNLOP seeks to provide new experiential value from rubber. Through this co creation, the tyre maker will enhance its analytical technologies and strengthen innovation. Fujitsu will promote this approach across large scale FEM analysis in automotive and other manufacturing sectors, contributing to carbon neutrality via an AI platform combining FUJITSU MONAKA and GNN.

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