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【正文】 stage process, as follows: (1) product classification and machine specifications, (2) division of injection molds into modules based on functionality, (3) division of individual modules into multiple units with subfunctions, and the relationship between design and assembly for each unit, (4) standardization of structural units, and (5) coding of standard structural units. These individual processes are detailed below. Clamping plateClamping moduleFemale mold baseMale mold baseManifoldHotrunner moduleHottip bushingHot tip A beveragecontainerFemale mold inserthotrunner injection moldCup base female mold insertMolding moduleMale cooling baseMale mold insertAir ejectorLeader pinGuiding moduleLeader pin bushing CostDuration of modular molddevelopment processCostDuration of conventional molddowndevelopment processHighly efficient processdeliveryMaterialsmachiningCNCMillingTurningtreatmentHeatproductSemiEDMcuttingWirePolishingTextureProductTimeConventional mold development processReduction of working hoursModular mold developmentprocessFig. 2 Comparison of conventional and modular mold development processes Product classification and machine specificationsThis step classifies all of the beverage containers based on their geometry and dimensions, and selects the machine with the most suitable specifications for production. There are five major qualifications for an injection molding machine, including sufficient mold clamping force, sufficient theoretical shot volume, sufficient distance between tie bars, sufficient range of mold thickness, and sufficient mold clamping stroke. Division of injection molds into modules based on functionalityThis step divides a mold set into several modules with individual functions. The principles of division include general rule, division rule, applicability rule, and interchange rule. In general rule, modules must contain all the functions of beveragecontainer injection molds. In division rule, each functional module must contain at least one fundamental function and each unit must fulfill its own specific functions. As to applicability rule, units fulfilling a single function are
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