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dc.contributorDepartment of Mechanical Engineeringen_US
dc.creatorRan, Jiaqi-
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleInner undercut feature recognition and automatic generation of side actions and inside pins for an injection mold systemen_US
dcterms.abstractUndercut features are usually molded by side cores and inside pins. These local molding tools must withdraw before the main core and cavity blocks opened along parting direction. The design of side cores and inside pins is done manually at present as the automatic recognition of undercut features and generation of side actions are quite difficult. This thesis provides a new methodology to deal with the automatic design of inside pins via the automatic recognition of undercut features. The outer edge loop which represents the largest boundary projection on a reference plane perpendicular to the given parting direction is first extracted and patched. By classifying the geometrical entities into different types based on their geometrical relationship, the parting surfaces and molding surfaces can be easily identified. After judging whether the bounding boxes of any two inside pins and main core projection have intersection area, deep inner undercut detection result is then generated and the corresponding redesign suggestion is provided. The above - proposed methodology was implemented through case studies, and its advantages in handling complex parts are illustrated compare to previous research. The methodology is proved better than previous work according to computation result and will be developed in the future.en_US
dcterms.extentx, 132 leaves : col. ill. ; 30 cm.en_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.educationalLevelAll Masteren_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertations.en_US
dcterms.LCSHInjection molding of plastics.en_US
dcterms.LCSHInjection molding of plastics -- Methodology.en_US
dcterms.accessRightsrestricted accessen_US

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