DIEFFENBACHER supplies complete solutions for producing transformer boards

DIEFFENBACHER, one of the world’s leading manufacturers of press systems and complete production lines for forming technology, offers innovative solutions for the efficient and economical production of cellulose-based insulation material, also known as pressboard or transformer board.

Transformer boards are high-precision cellulose-based insulation boards used as the basic insulation material in power, distribution and special transformers. They ensure electrical and mechanical safety in transformers and are indispensable for reliable energy transmission and distribution. Cut to the desired size, transformer boards serve as the base material for components such as cylinders, rings, panels and molded parts.

The market for transformer boards is growing steadily, driven by the global energy transition, the expansion of power grids and the modernization of energy infrastructure. Other drivers include the ongoing digitalization of all areas of life, the unstoppable advance of Artificial Intelligence and the sharp rise in e-mobility. The manufacture of transformer boards requires the utmost precision and process reliability, as the requirements for material purity, dimensional accuracy and surface quality are particularly high.

DIEFFENBACHER supplies complete plant solutions for producing transformer boards, including multi-opening hot presses with up to 20 openings for pressing and drying wet cellulose boards, as well as automated loading and unloading systems, precise trimming solutions, primary and secondary heating circuits, end-of-line processing such as sawing, packaging and storage, as well as laminating presses. DIEFFENBACHER has over 70 years of experience with multi-opening presses and has built and delivered more than 200 multi-opening plants to customers worldwide.

“Our solutions enable our customers to produce transformer boards of the highest quality and with maximum efficiency. Our plants are individually tailored to customer-specific requirements—from the specific pressing force, number of openings, and heating platen size to the degree of automation,” says Marco Hahn, Director Sales of DIEFFENBACHER’s Forming Business Unit.

DIEFFENBACHER plants for manufacturing transformer boards are designed for maximum process reliability, short cycle times and the highest product quality. Simultaneous pressure build-up on the end product through the simultaneous closing of all openings ensures that all boards are manufactured with identical process parameters and consistently high quality.

Additional features, such as heating platens tailored to the requirements of transformer boards and optimized water/steam drainage, increase the plant’s performance. A screen belt between the heating platen and the board also prevents direct contact, protecting the product surface from contamination and facilitating drainage. Simultaneous loading and unloading, as well as quick opening and closing of the press, shorten cycle times and increase output rates.

In addition to multi-opening hot presses for manufacturing transformer boards, DIEFFENBACHER also supplies presses for laminating boards and rings. The scope of delivery includes the laminating press, along with loading and unloading, automated stacking and glue application.

Alongside state-of-the-art technology, DIEFFENBACHER also offers comprehensive lifecycle services: from consulting and project planning to commissioning, maintenance, modernization and digitalization solutions. The EVORIS Intelligence digital platform enables manufacturers to transparently monitor production, optimize processes and further increase plant availability.

“The numerous plants we’ve delivered in Europe prove that we are a strong partner for companies that manufacture transformer boards,” says Hahn. “Our customized solutions continue to set new standards, enabling a safe, efficient and sustainable energy future,” he concludes.