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- W2893836779 abstract "In plastic engineering, the mould design is considered a complex process or an art, due tothe polymers used their differences and changes in properties, as well as other factors like shrinkage ofthe materials. An Important point in mould design considerations is to use real and actual values ofshrinkage in the early stages of design to avoid any design errors and produce an economic template.Some containers produced locally leaks the liquids, which causes inconveniences for the users. Thisproblem is attributed to unspecified data of raw material shrinkage. In this work, five samples made ofpolypropylene PP113 bought from the local market (Khartoum petrochemical company), and another fivesamples made of low-density polyethylene (LDPE), produced by SABIC of Saudi Arabia were mouldedusing ISO 294 test mould of dimension 60x60x2mm. The shrinkage for the test samples was measuredaccording to test specifications. The averages shrinkage for samples made of PP113 was found to be 1.88,and that for LDPE was found to be 0.84. The experimental results were compared to a simulation resultsobtained using Visi-12.2, and MoldFlow-Mpi Ver. 5.1 software, which often used for studying andanalyzing the behavior of plastic materials in moulds cavities. For Visi-12.2 software, the longitudinalshrinkage was found to amount of 1.25, for PP113 material, and 2.50 for LDPE material. For MoldFlow-Mpi Ver. 5.1 software, the longitudinal shrinkage was found to be 1.003 for PP113 material, and 2.21 forLDPE material. The study concluded that, there is a notable difference between the values of shrinkageobtained practically and that built in the software’s libraries, and thus for precision parts practicalshrinkage tests are inevitable." @default.
- W2893836779 created "2018-10-05" @default.
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- W2893836779 date "2018-09-27" @default.
- W2893836779 modified "2023-09-24" @default.
- W2893836779 title "Shrinkage of Plastic Raw Materials (A Comparative Study of Mould )" @default.
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- W2893836779 hasPublicationYear "2018" @default.
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