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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Dynamic conformal cooling improves injection molding : hybrid molds manufactured by laser powder bed fusion
Authors: Kirchheim, Andreas
Katrodiya, Yogeshkumar
Zumofen, Livia
Ehrig, Frank
Wick, Curdin
et. al: No
DOI: 10.1007/s00170-021-06794-0
Published in: The International Journal of Advanced Manufacturing Technology
Volume(Issue): 114
Issue: 1-2
Page(s): 107
Pages to: 116
Issue Date: 8-Mar-2021
Publisher / Ed. Institution: Springer
ISSN: 0268-3768
Language: English
Subjects: Additive manufacturing; Laser powder bed fusion; Laser beam melting; Maraging steel; Hybrid-mold; Conformal cooling; Injection-molding
Subject (DDC): 670: Manufacturing
Abstract: To achieve a certain visual quality or acceptable surface appearance in injection-molded components, a higher mold Surface temperature is needed. In order to achieve this, injection molds can be dynamically tempered by integrating an active heating and cooling process inside the mold halves. This heating and cooling of the mold halves becomes more efficient when the temperature change occurs closer to the mold surface. Complex channels that carry cold or hot liquids can be manufactured close to the mold surface by using the layer by layer principle of additive manufacturing. Laser powder bed fusion (L-PBF), as an additive manufacturing process, has special advantages; in particular, so-called hybrid tools can be manufactured. For example, complex tool inserts with conformal cooling channels can be additively built on simple, machined baseplates. This paper outlines the thermal simulation carried out to optimize the injection molding process by use of dynamic conformal cooling. Based on the results of this simulation, a mold with conformal cooling channels was designed and Additively manufactured in maraging steel (1.2709) and then experimentally tested.
Fulltext version: Published version
License (according to publishing contract): CC BY 4.0: Attribution 4.0 International
Departement: School of Engineering
Organisational Unit: Centre for Product and Process Development (ZPP)
Appears in collections:Publikationen School of Engineering

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