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The ONEJOON GmbH is a German plant engineering company with German sites in Bovenden, near Göttingen, and Böblingen, near Stuttgart. The company has a tradition of over 125 years in the construction of highly flexible and technologically sophisticated furnaces in a wide range of industries. The ONEJOON GmbH employs 233 people at its locations in Germany, 132 of them in Bovenden and 101 in Böblingen.
ONEJOON is the technology and market leader for oxidation and carbonization furnaces in the core market of carbon fiber production. The company holds a prominent position in the markets of cathode and anode material production for the lithium-ion battery, hardening of blades and saw blades, sintering of metals and ceramics, heat treatment of aluminum wheels , and in the area of special applications and novel materials (e.g. in the area of powder chemistry and fuel cells). ONEJOON supplies not only customized furnace technology, but also the appropriate automation and integration of process and material flow.
Industrial furnaces from ONEJOON are optimized with regard to performance and throughput. The focus is on innovative high-tech systems of high quality that set new industry standards. As a reliable partner for thermal processes, the focus is on service and a holistic approach: services do not stop at the delivery of industrial furnaces, but also take into account process integration, optimization, and peripherals. A service team handles the supply of spare parts, maintenance and modification of existing plants worldwide.
In the German Test Center at the company's headquarters in Bovenden, ONEJOON experts also carry out tests for the optimization of heat treatment processes and systematically accompany customers during the step from the laboratory to industrial production. This service is based on a structured lab-to-production program.
Since January 2020, ONEJOON GmbH, the former Eisenmann Thermal Solutions GmbH & Co. KG, with locations in Germany, the USA, and China, has been fully part of the ONEJOON Group as a subsidiary.
The parent company ONEJOON Co., Ltd. is a mechanical engineering company headquartered in Suwon, South Korea, whose main market is the production of high-temperature furnace systems including associated conveyor and process technology for processing cathode and anode material in lithium-ion batteries.

FURNACES AND PLANT FOR ALMOST ALL AREAS OF HEAT TREATMENT FROM HELLMONSÖDT NEAR LINZ
HOFMANN Wärmetechnik has a long tradition in plant engineering. Since 1946 furnaces and plants for almost all areas of heat treatment have been developed and built.
Our customers include companies from the automotive and aircraft industries as well as small and medium-sized enterprises in the field of heat treatment. We know about possible problems in heat treatment and offer innovative solutions.
Today our furnaces are known for their reliability in over 40 countries.