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Verification Of Effectiveness Of Spot-Heating Technique In Reducing Spread Of Weld Lines In Injection Molded Plastic Products, Shah Ashikul Abed Sakar
Verification Of Effectiveness Of Spot-Heating Technique In Reducing Spread Of Weld Lines In Injection Molded Plastic Products, Shah Ashikul Abed Sakar
Masters Theses
In producing a plastic part in an injection molding machine many physical factors related to the machine, such as injection pressure, holding pressure, heater temperature, etc. play their roles in the overall quality of the produced part. There are many aspects of the quality of a plastic part, such as part strength, part dimensions, and part surface finish. If any of those aspects gets compromised, the part is considered to have some defects. Of all defects found in injection-molded plastic parts, one most common defect is the presence of weld lines.Weld lines are formed when the flow of the molten …
Investigation Of Selective Laser Melting Fabricated Internal Cooling Channels, Colin Jack
Investigation Of Selective Laser Melting Fabricated Internal Cooling Channels, Colin Jack
Masters Theses
Channels where coolant is run to cool a system are common in injection mold tooling. Conventionally, these channels are machined into the mold. This has limited the design of mold cooling systems to the constraints of traditional machining processes, where straight circular channels machined from cast material are typical. The transfer of heat away from the part cavity into these cooling channels has a large effect on the cooling time of the injection mold cycle. In this investigation, laser powder bed fusion processes were used to create non-circular cooling channels. To compare cooling performance, elliptical and circular channels of equal …