KraussMaffei Berstorff offers extensive know-how in the field of rubber sheet production – starting from extrusion technology and calendering all the way through to continuous vulcanization.
We deliver complete rubber sheet production lines as one-stop solutions to ensure professional project implementation, smooth processing and premium product quality. Benefit from our longstanding experience combined with comprehensive in-house technical expertise.
Optimal solution for premium-quality products
Customized roller-head lines continuously produce blister-free rubber sheets of up to 20 mm thickness from natural or synthetic rubber with maximum productivity. These lines are designed for the entire range of rubber sheet applications – from floor coverings, uncured
conveyor belts, pressure blankets and roofing sheets up to semi-finished tire components.
All these roller-head lines for the production of rubber sheets are exclusively equipped with extruders and calenders developed by KraussMaffei Berstorff and stand out for excellent product quality and unparalleled productivity.
Additional technical benefits at a glance:
The automation of all process steps minimizes set-up times and enhances the productivity of roller-head lines. Thanks to the central master control station and the machine control system, line settings can be made conveniently and centrally. The innovative process-oriented operator guidance helps to shorten set-up times for product changes and to reduce manpower requirements.
High-performance calendering solutions for sustainable process optimization
With its calendering technology portfolio comprising calenders of “I” or “inverted L” or “S” design with 2, 3, 4 or 5 rolls, KraussMaffei Berstorff offers an extensive range of different solutions. The modular set-up and various accessories provide maximum flexibility and outstanding productivity.
Convincing designs for the most varied products – highly flexible and reliable solutions
KraussMaffei Berstorff offers a comprehensive
range of upstream and downstream auxiliary equipment customized to your individual requirements.
This equipment includes different types of winders, contactless thickness gauges as well as laminating and cutting systems that are perfectly tailored to the specific process and ensure short retooling times and maximum production reliability.
Design features of KraussMaffei Berstorff
calenders at a glance:
Just as flexible and reliable as on the very first day
The KraussMaffei Berstorff AUMA is ideally suited for laminating or vulcanizing rubber sheets, printing blankets, conveyor belts and roofing sheets in a thickness range from 0.5 to 20 mm. The advantages of this continuous process are low operating costs, short retooling times, low wear and spare parts requirements and easy operation and servicing.
The functional principle of the automatic mat vulcanizing system (AUMA) is largely based on the heating drum, deflector rolls and the pressure belt. The pressure belt wraps around the heating drum over the largest part of its circumference and presses the material to be vulcanized, welded or compressed against the heating drum while under high tensile stress. A drive on the upper deflector roll continuously controls the speed depending on the specific application. Constant production conditions provide for a reproducible product with premium quality in longitudinal and transverse directions.
Used in combination with a roller-head line, the AUMA offers outstanding economic benefits in particular in the rubber industry. The heat produced in the extruder during the production of the rubber sheets is used for subsequent vulcanization in the AUMA.
Profile production systems – Create premium quality sealing for the automotive and construction industry
KraussMaffei Berstorff profile production systems are the globally leading technology for increasing productivity and efficiency when manufacturing profiles of rubber, TPE or silicon. Alongside extrusion technology, the optimal coordination of the different system components is critical.
Excellent quality and absolute reliability - in order to prove itself in continuous use and to add to the economic success of the company, a profile extrusion system has to be equipped as well as possible to meet the high requirements. From the system solution for monoprofiles to hybrid profiles with up to 5 different components, for every system, the same principles for success apply: the highest quality, maximum availability, a modular design that permits growth and flexibility.
Manufacture rubber seals reliably and economically
KraussMaffei Berstorff rubber profile manufacturing systems produce the most different kinds of profiles:
Hollow or solid, with smooth or rough surfaces, with individualized contours, with or without steel reinforcement, in the highest quality.
The profile production systems are put together entirely according to the requirements of your product. Equipped with extrusion and vulcanization technology optimally aligned to one another, cutting and winding machines and the most varied measuring equipment, our systems distinguish themselves through high productivity and cost-effectiveness.
Future-oriented materials, processed in an environmentally friendly way
The production tasks correspondingly have various system concepts, with up to five single-screw extruders with screw diameters from 30 mm to 90 mm. The reliable systems are designed for processing polypropylene (PP) or thermoplastic elastomers (TPE) in the most varied degrees of hardness. A wide variety of extruder heads and specially made profile molds provide the basis for premium quality hybrid profiles, regardless of whether you would like to manufacture foaming or compact profiles.
With the use of an innovative injection system, you can produce foaming profiles with environmentally friendly propellants.
The modular structure allows flexible, customized machine configurations: from the conventional mono profile system to the hybrid profile system with flock-tape system or steel reinforcement. The upstream and downstream equipment such as vacuum conveyors for metering energy-optimized raw material pre-drying and heat-balancing channel and cooling basins with closed water circulation make a crucial contribution to the increase in the system's energy efficiency. A central control panel is used to control all of the system components and auxiliary units. KraussMaffei Berstorff provides the turnkey composite profile system with broken-in mold, from the metering system to the deposit tray of the finished profiles.
Silicon extrusion systems in KraussMaffei Berstorff quality
For the extrusion of solid silicon rubber, KraussMaffei Berstorff provides complete systems for manufacturing profiles and hoses.
The design engineering and manufacturing of these systems demands a high degree of materials expertise and manufacturing quality. In order to achieve the highest output when processing solid silicone rubbers, the KraussMaffei Berstorff extruders are equipped with an innovative cooling system. The temperature of the rubber thus stays reliably below the response temperature of the catalyst.
Hot air systems
High flexibility and ease of operation
The LabStar lab system offers a high degree of process flexibility and is at the same time markedly easy to operate. Due to its modular design, the system can be quickly adapted for different tasks.
Due to its low material consumption of only 8 kg/h, the profile production system is suited above all for research tasks and compound developments, since it can be used to manufacture test bodies and sealing profiles with a diameter less than 1 cm². Rubber compounds for the extrusion process and for various profile characteristics can be optimized in further practical trials using the profiles.
The machine is built around a GE 25 x 18D rubber extruder for continuous material forming, and is equipped with a mobile control panel for operating the system. The subsequent pre-vulcanization of the profile is carried out by a shock module with short-wave infrared emitters.
The compact combination of microwave and hot-air channels is based on production system technology and scores points due to an effective hot air channeling system which conducts the energy to the product in the most efficient way. The easy-opening covers make it possible to position the product easily during start-up and to clean the process chamber quickly.
Special emphasis was also given to the machine's operating concept. A control panel and touchscreen on the vulcanization unit enable easy operation and excellent visuals. Operating the unit on site means that each setting can be checked visually at the same time.
Solutions for effective production and excellent products
Tire lines from KraussMaffei Berstorff are economical solutions for continuous manufacturing of tire components at a high quality level. Through the special machine designs, the systems stand out due to:
KraussMaffei Berstorff extrusion systems are conceived for high product quality and the highest output and are equipped with extruders of various models (GE-SC or GE-W, GE-KS) and sizes. Through the modular construction, the system configuration, corresponding to the desired profile cross-sections, is relatively simple to establish as a double, triple, quadruplex, quintuplex, and hexaplex unit.
KraussMaffei Berstorff multiplex systems are conceived to be stacked in the piggyback design, in order to achieve the highest product quality through the symmetric material flow in the extrusion head. Additionally, the compact design results in a significant gain of space. An additional feature in order to fulfill the high quality requirements is the special design engineering of the flow channels in the extrusion head. They create a very soft and non-invasive transition for the extrudate of round diameter from the screw zone to a rectangular, flat profile form. Additionally, the deflection of the mass flow in the channel is reduced to a minimum.
All process sequences are continuously checked by a monitoring system. Through it, a high operating reliability is guaranteed.
Throughputs of up to 10,000 kg/h or approx. 30,000 car treads per day are achieved with the state-of-the-art systems.
Roller head systems – Tandem for millimeter work
The KraussMaffei Berstorff roller-head technology provides a perfect combination of precision and cost-effectiveness: the lowest tolerances in the production of inner liners and carcass fillers or squeegee strips.
The rubber compound plasticized in the extruder is conveyed via a wide extrusion die directly into the roll nip of a two-roll calender. The calender calibrates the web exactly to the configured final thickness. The lowest tolerances over the entire web width and an optimal mixture homogeneity guarantee the production of inner liners and filler strips without bubbles or pores.
In the roller head systems for manufacturing rubber webs, the extruders and calenders developed by KraussMaffei Berstorff are used exclusively. They are responsible for excellent product quality with the highest productivity.
Additional technical features at a glance:
The automation of all process steps minimizes the set-up times and increases the productivity in the roller head systems. With the central master control station and the machine control system, settings for the system can be carried out conveniently and centrally. The innovative process-oriented operator guidance system aids in reducing set-up times when changing orders and makes it possible to use fewer personnel.
CapStrip line - the highest product quality and reliable production
The KraussMaffei Berstorff CapStrip Line for manufacturing jointless bandages with nylon or hybrid cords for high-speed tires.
The system is designed for coating cords with different rubber compounds. 16 strips with 9 threads each are produced in a single pass.
The superior benefits offered by our Cap strip line give you the quality edge you are looking for:
Hose extrusion systems - proven technology for the highest standards
Hydraulic hoses, automotive hoses or industrial hoses: Here, you will find the optimum system solution for hose fabrication for your company. The extrusion systems from KraussMaffei Berstorff set new benchmarks with their productivity and their innovative detailed solutions in hose fabrication. As a general contractor, KraussMaffei Berstorff provides all services for the construction of a high-performance extrusion system: Conception of the system and of the testing lab, design engineering, manufacturing and installation of the machine technology, training of the machine operators and commissioning, all from a single source. With complete solutions, alongside the economical advantages, we offer you, above all, the guarantee of the best possible technical matching of all individual components. In this way, even in the project planning phase, you can be sure that there will be no problems later.
Highest standards in hose production
With the extrusion systems from KraussMaffei Berstorff to manufacture high-pressure hydraulic hoses, you can fulfill even the most varied customer wishes.
The hose extrusion systems unite innovative solutions of extrusion technology with the state-of-the-art downstream equipment technology. The result is a highly modern system, with which you are best equipped for the increasing challenges of the market.
The systems for production of hydraulic hoses are designed specifically for the customer and its process technology. They allow the manufacturing of various hoses with multiple layers of tensile steel braiding for working pressures of 70 bars up to 420 bars and bursting pressure over 1000 bars, depending on hose diameter.
Typical materials: EPDM, NBR, SBR; reinforcement with stainless steel and textile cords
Typical products: 1SN, 2SN and 4SH high pressure hydraulic hoses
Hose extrusion systems made to measure
Innovative ideas connect themselves to advanced technology to create a maximum of efficiency and reliability. KraussMaffei Berstorff hose extrusion systems form a unique, one-of-a-kind performance class for the highest quality and productivity requirements in the manufacturing of automotive hoses and shaped hose sections.
From the preparation of rubber compounds to the development of the finished end products, the systems fulfill all requirements for perfect operability and the shortest setup times for product changes and high machine availability.
The wide variety product requirements and requirements from a process technology standpoint are met by KraussMaffei Berstorff with an absolutely customer-specific flexibility during system planning and design. Well-founded knowledge across the complete production process makes KraussMaffei Berstorff a reliable partner for manufacturing automotive hoses.
Tailored to your requirements, the systems can, for example, be equipped with different extrusion procedures, fully integrated manufacturing of the reinforcement and Programmable Logic Controller-run control system. With this, the systems give you almost everything you could want in a state-of-the-art manufacturing system. Regardless of which automotive hoses you want to produce, hose extrusion systems from KraussMaffei Berstorff define the highest benchmarks in all areas – now and in the future.
Typical materials: EPDM, NBR, SBR; reinforcement with stainless steel and textile cords
Typical products: Automotive hoses for exhaust systems, drive train, oil cooling, coupling, brakes, air conditioning and heating system, fuel, steering, hydraulic chassis stabilization, air flow and intake hoses
Proven technology and high production reliability
Hose extrusion systems from KraussMaffei Berstorff always provide an optimal economical solution for your hose fabrication.
The systems prove themselves in daily use in manufacturing various tissue-reinforced hoses, which are used for a wide range of applications in industry. Depending on hose type, the systems offer the highest capacity with the lowest personnel usage and, with that, set the benchmark in the fabrication of industrial hoses. This is further supported through the shortest set-up times and a high degree of reliability. In conjunction with the most varied machine components, the highest accuracy and quality is achieved. Thanks to the wide range of extruders and the various machines for manufacturing the reinforcement, they are suitable for every application.
Typical materials: EPDM, NBR, SBR; reinforcement with stainless steel and textile cords
Typical products: Water hoses, hoses for foodstuffs, beverages, cosmetics and the pharmaceutical industry, oxyacetylene hoses, construction and conveyor hoses, chemical and fueling hoses
Achieve higher coating quality.
With the extrusion systems from KraussMaffei Berstorff, you can easily coat rolls, sleeves or pipes for the most varied industries. The systems, with our high-performance rubber extruders, process every common rubber compound and coat them in the highest quality.
The coating systems from KraussMaffei Berstorff distinguish themselves with short set-up times, maximum productivity and high coating quality. In order to achieve that, all components of the systems are optimally adapted to each other.
High quality is always well received.
As long as the coating was applied with precision.
The advantages of the Covermatic systems at a glance:
Crosshead extrusion systems – the perfect combination!
Crosshead extrusion systems consist of perfectly matched components to ensure reliable and precise operation. Our systems are ideal for direct coating of roll cores and other round parts with core diameters between 5 and 200 mm and layer thicknesses of 2 to 20 mm. Depending on the crosshead size and the required output capacity, these systems can be equipped with vacuum rubber processing extruders with screw diameters of 60, 90 or 120 mm.
Strip winding systems: No compromises
Whether for flat or diagonal coating, the systems persuade in terms of cost-effectiveness and quality. Rolls up to a core diameter of 2,800 mm and in any face length can be equipped in a single pass with rubber layers from 0.5 - 70 mm.
Through the use of the various rubber extruders from KraussMaffei Berstorff, the covering systems provide an economic system concept for practically every commercially available rubber compound. That creates the basis for your success.
The cost-effectiveness is based on an optimal cooperation of numerous factors:
Preparing rubber compounds
Excellent quality and absolute reliability - in order to prove itself in continuous use and to add to the economic success of the company, systems for preparing rubber compounds have to be prepared as well as possible to meet the high requirements. From the strainer solution to the rolling mill technology, the same principles for success apply to every system: the highest quality, maximum availability and flexibility and perfect integration into the workflow of rubber article production.
Clean compounds and high efficiency
Strainer systems are the ideal investment for the future for many manufactures of rubber articles; they reliably remove contamination from rubber compounds. The result: Clean compounds for manufacturing premium quality sealing profiles, hoses or sheets.
KraussMaffei Berstorff strainer systems are outfitted with innovative components to reduce setup time and increase productivity. The various mesh sizes provide the compound with highest possible purity.
Sieve changer with hydraulic feed system – for easily replacing sieves.
High-performance extruders with proven technology
Hot-feed KraussMaffei Berstorff GE-W series extruders have proven themselves in manufacturing a wide assortment of natural and artificial rubber products. They are fed as units downstream of roller mills, either continually with strips or intermittently with rolls of uncured rubber. They evenly shape the preheated plasticized rubber. In addition, they can be arranged as discharge extruders directly below internal mixers. In this form they receive screws with larger diameters and tamping dies as a means of facilitating infeeding.
Customized technology for the best reliability
For V-belt manufacturers that would like to meet increasing customer demands at a professional level, the V-belt systems from KraussMaffei Berstorff are the ideal systems for coated, open-flank V-belts or V-ribbed belts. Their customized technology lets them offer production and investment security thanks to high product quality and reliability. Depending on the requirement, systems with different system components can be equipped for semi-finished products, assembly, vulcanization, cutting, grinding, measuring, inspecting and stamping. The result is a system optimally tailored to the product. A system whose versatility speaks for itself and makes it easy to have profitable production.
Coated V-belts - system design features:
Open-flank V-belt and V-ribbed belts – system design features
Just as flexible and reliable as on the first day
More than 80 years after its market launch, the KraussMaffei Berstorff AUMA stands for quality and long-term productivity. In the production of floor coverings, wall panels, and conveyor belts made of PVC, or when pressing chipboards and fiberboards, it remains a synonym for flexibility, product quality, and reliability.
The functional principle of the automatic mat vulcanizing system (AUMA) is largely based on the heating drum, deflector rolls and range of pressure components. The pressure belt winds around the heating drum at the largest part of its circumference and presses, while under high tensile stress, the material to be vulcanized, welded or pressed against the heating drum. A drive on the upper deflector roll continuously regulates the velocity, depending on the intended use. Constant production conditions provide for a reproducible product with high quality in longitudinal and transverse directions.
For manufacturing floor coverings made of PVC or polyolefin granulate, chips and films, KraussMaffei Berstorff has the two-drum AUMA V. It is equipped with a heating drum with additional infrared radiation heating and a cooling drum. The product is heated, formed and cooled between the two steel bands in a single process. A smooth surface and high quality of the product are guaranteed at all times.