DESIGN AND MAKING OF CONFORMAL COOLING SYSTEM FOR SOLVING INJECTED PLASTIC PART WARPAGE PROBLEMS BY USING DIRECT METAL LASER SINTERING METHOD
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Abstract
Commonly, conventional cooling system of a plastic injection mold consisted of a drilled set of interconnected cooling channels. These cooling channels frequently provide non-uniform cooling, resulting in long cooling time and part warpage. This problem can be remedied by using conformal cooling technique. Aim of the research work was to design conformal cooling system for improve mold insert which cannot build cooling system inside. Typical plastic rinsing spray, core insert of plastic injection mold has small dimension and complex shape design. Hence it cannot build cooling system inside by using conventional method. For core insert with conformal cooling system, P20 powder metal is used for laser sintering process and coolant for mold cooling system is oil. The technique 3D scanning is used for part model creating. Rhinoceros 4.0 and Moldex3D R11.0 computer programs are applied for cooling system design and plastic flow analysis. For plastic injection mold design and G-code generating, Cimatron E11.0 is used for mold manufacturing. The results from plastic injection experimental, cycle time can reduces 5 seconds and further part setting outside with cooling jig is eliminated which can reduces time 120 seconds for production process.
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References
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