TAILIEUCHUNG - A scaffolding architecture for conformal cooling design in rapid plastic injection moulding

This paper proposes a novel scaffold cooling for the design of a more conformal and hence more uniform cooling channel. CAD model for constructing the scaffolding structure is examined and cooling performances are validated by computer-aided engineering (CAE) and computer fluid dynamics (CFD) analysis. | Int J Adv Manuf Technol 2007 34 496-515 DOI s00170-006-0628-x ORIGINAL ARTICLE A scaffolding architecture for conformal cooling design in rapid plastic injection moulding K. M. Au K. M. Yu Received 4 August 2005 Accepted 25 March 2006 Published online 8 June 2006 Springer-Verlag London Limited 2006 Abstract Cooling design of plastic injection mould is important because it not only affects part quality but also the injection moulding cycle time. Traditional injection mould cooling layout is based on a conventional machining process. As the conventional drilling method limits the geometric complexity of the cooling layout the mobility of cooling fluid within the injection mould is confined. Advanced rapid tooling technologies based on solid freeform fabrications have been exploited to provide a timeeffective solution for low-volume production. In addition research has made attempts to incorporate conformal cooling channel in different rapid tooling technologies. However the cooling performance does not meet the mould engineer s expectations. This paper proposes a novel scaffold cooling for the design of a more conformal and hence more uniform cooling channel. CAD model for constructing the scaffolding structure is examined and cooling performances are validated by computer-aided engineering CAE and computer fluid dynamics CFD analysis. Keywords Conformal cooling . Scaffolding . Rapid tooling . Plastic injection moulding 1 Background on cooling channel design in plastic injection mould In recent years rapid prototyping and tooling 1 processes have found widespread use in speeding up tooling K. M. Au K. M. Yu Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hung Hom Hong Kong People s Republic of China e-mail mfkmyu@ production. These processes greatly reduce the manufacturing cost and the lead time required for tool production. Figure 1 illustrates the difference between traditional tooling production and .

• Cơ khí - Chế tạo máy
• A scaffolding architecture
• Air distribution structure
• Rapid plastic injection moulding
• Conformal cooling design
• Copper duct