Rudolf Erdmenger

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Rudolf Erdmenger (born September 29, 1911 in Augsburg , † 1991 ) was a German mechanical and process engineer .

Life

Rudolf Erdmenger was born as the son of the production engineer of the Gersthofen works of the Farbwerke vorm. Meister, Lucius & Brüning AG , today Clariant . After graduating from high school, he studied mechanical engineering at the Technical University of Munich . In 1932 he became a member of the Corps Vitruvia Munich. In 1935 he completed his studies with the academic degree of Dipl.-Ing. and took his first job in industry at Humboldt-Deutzmotoren AG in Cologne-Deutz. After about two years he switched to the Paul Leistritz machine factory in Nuremberg , where he worked on the development of kneading pumps for IG Farben in Frankfurt am Main . In 1939 he moved to IG Farben in the Wolfen plant near Bitterfeld . There he began to work with Walter Meskat on the development of the closely intermeshing twin screw extruder , for which a patent was applied for in 1944 . Erdmenger and Meskat were able to flee from the Soviet occupation zone to the Rhineland after the end of the Second World War . While Meskat continued his professional activity at Bayer AG in Dormagen , Erdmenger moved to the Leverkusen site , where in 1948 he took over the management of the high viscosity technology process group in the newly established department of applied physics , also known as AP for short , which he took over until his retirement 1976 directed.

Erdmengers inventions found in polycarbonate - compounding the Bayer Group application and were decisive for the technical and commercial success of this plastic. A later development was reactive extrusion in the production of paints and thermoplastic polyurethanes .

His studies, published in the journal Chemie Ingenieur Technik , are considered fundamental in the professional world. As a globally recognized specialist in high-viscosity technology, he was given the honor of editing two chapters for Houben-Weyl . He has received awards from the Society of Plastics Engineers and the University of Akron for his life's work .

Awards

  • 1986: Distinguished Service Award from the Society of Plastics Engineers (SPE)
  • Induction into the Polymer Processing Hall of Fame at the University of Akron, Ohio , USA

Fonts

Contributions in standard works:

  • Press off . In: Houben-Weyl, Methods of Organic Chemistry. 4th edition, Volume I / 1, 1958, pp. 199 ff.
  • Execution of mixing processes in gases, liquids, powders and plastic materials . In: Houben-Weyl, Methods of Organic Chemistry , 4th Edition, Volume I / 2, 1959, p. 699 ff.

Monographs :

  • Screw machines for high viscosity process engineering. 1978.

Journal Articles:

  • Material shredding mixing processes . In: Chemische Industrie , born 1953, pp. 513-518.
  • For the development of screw evaporators . In: Chemie Ingenieur Technik , 34th year 1962, pp. 751–754.
  • Multi-shaft screws in process engineering . In: Chemie Ingenieur Technik , 36th year 1964, pp. 175–185.
  • Degassing of highly viscous liquids . In: MM Maschinenmarkt , Volume 80, 1974, Issue 1, pp. 2–6 / Issue 10, pp. 148–152.
  • Investigations on a screw evaporator . In: Chemie Ingenieur Technik , 42nd year 1970, pp. 1–5 (together with M. Ullrich)

Patents:

  • Device for kneading, gelatinizing and pressing plastic masses (patented technology: co-twist double screw with sealing profile). Patent DE 862668 C, priority year 1944 (together with Walter Meskat, basic patent for the closely intermeshing twin screw extruder)
  • Device for dewatering or leaching of fibrous masses (patented technology: co-twist triple screw with sealing profile for pressing). Patent DE 872732 C, priority year 1944 (together with Walter Meskat)
  • Mixing and kneading device (patented technology: constant-twist kneading disks with sealing profile, single-thread and double-thread as well as special case circular eccentric). Patent DE 813154 C, priority year 1949 (basic patent for the kneading element)
  • Mixing and kneading device (patented technology: constant-twist kneading disks with sealing profile, three-thread, kneading elements, extension). Patent DE 940109 C, priority year 1953
  • Worm arrangement (patented technology: co-twist double screw with sealing profile and modular design). US 3122356 A, priority year 1958
  • Kneading device with two or more screws (patented technology: co-twist double screw with sealing profile and shoulder in the screw channel). Patent DE1180718 B, priority year 1962

literature

  • James L. White: Pioneer of the Modular Co-rotating Twin Screw Extruder. Rudolf Erdmenger (1911–1991). In: International Polymer Processing , Volume 16 2001, No. 2, p. 86. ( digitized version )
  • Klemens Kohlgrüber (Ed.): Co-Rotating Twin-Screw Extruder. 2008. ( digitized version )
  • Avraam I. Isayev (Ed.): Encyclopedia of Polymer Blends, Volume 2: Processing. 2011. ( digitized version )

Individual evidence

  1. ↑ a b Philisterverein Vitruvia eV Munich, list of members as of January 1937, no. 506.
  2. ↑ Success story: 50 years of Makrolon compounding in Krefeld-Uerdingen
personal data
SURNAME Erdmenger, Rudolf
BRIEF DESCRIPTION German mechanical and process engineer
DATE OF BIRTH September 29, 1911
PLACE OF BIRTH augsburg
DATE OF DEATH 1991