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- Rännar, Lars-Erik
(författare)
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Efficient Cooling of FFF Injection Molding Tools with Conformal Cooling Channels, : An Introductory Analysis
- 2003
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Ingår i: Advanced research in virtual and rapid prototyping. - Leiria : Escola Superior de Tecnologia e Gestão. - 9729902305 ; , s. 433-437
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Typically, the conventional machining techniques for the design of cooling layouts, in injection molding tools, are drilled straight bores placed around the tool cavity. Ejector pins, parting planes, cores, etc., make it impossible to gain an optimal cooling effect and the methods to improve the cooling, such as baffles and bubblers, are rather time-consuming and expensive. A numerical comparison of the efficiency between conventional cooling channel layouts, using straight holes and a baffle, and a free-form fabricated (FFF) layout was carried out considering cooling time and dimensional stability. The analyses showed a considerable improvement in both cooling time and dimensional stability in favor of FFF cooling channels. A reduction of the cycle time up to 67% was achieved with preserved, and even better tolerances on the dimensional stability.
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