rapid prototyping plastic injection molding

... (2006) 430–439 A systematic computer-aided approach to cooling system optimal design in plastic injection molding H. Qiao à Cardiff School of Engineering, Queen’s Buildings, The Parade, PO Box ... 2005 Available online 27 December 2005 Abstract Cooling system design is of great importance for plastic injection molding because it significantly affects the productivity and quality of the final products. ... [12,13] presented another approach to simulate the transient heat transfer within a mold during the injection molding process. The transient temperature distributions in the mold and the polymer part are...

Ngày tải lên: 12/02/2014, 22:20

... Conformal cooling . Scaffolding . Rapid tooling . Plastic injection moulding 1 Background on cooling channel design in plastic injection mould In recent years, rapid prototyping and tooling [1] pro- cesses ... of injection mould with intricate cooling channel geometry. Rapid tooling based on SFF technology includes RapidTool, SL, SLS or rapid casting, [8] etc. They provide significant advantages to plastic ... rapid plastic injection mould. 5.1 Cooling performance investigation of cooling channel by meltflow analysis Cooling performance analysis will find the temperature distribution in a plastic injection...

Ngày tải lên: 12/02/2014, 22:20

... Bushing Hot Runner Systems Injection Molding Tooling Valve Gate Shut Off System Bushings are Opened for Injection Recommended runner sizes Optimizing Cycle Time Source: Injection Molding Magazine article Source: ... to a cosmetic surface may cause surface imperfections. Source: GE Plastics It is suggested that direct gates not be used in molding reinforced resins into rectangular shapes. Fiber orientation ... Considerations ã Molding Cycle.80% is cooling time ã Flow type.Laminar or Turbulent ã Flow rateGPM ã Reynolds number of > than 5000 for turbulent flow ã Thermal conductivity of mold steel ã Plastic...

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Ngày tải lên: 28/04/2014, 15:56

... model fabrication using rapid prototyping tools. Integrated Manufacturing Systems 2000, 11(1):42-53. 3. Hieu LC, Zlatov N, Sloten JV, Bohez E, Khanh L, Binh PH, Oris P, Toshev Y: Medical rapid prototyping: ... Zollikofer CPE, Ponce de Leon MS: Tools for rapid prototyping in the biosciences. IEEE Computer Graphics and Applications 1995, 15(6):48-55. 5. Noorani R: Rapid Prototyping: Principles and Applications ... rapid prototyping machine for fabrication. Results: Two AFOs were rapidly prototyped to demonstrate the proposed process. Gait analysis data of a subject wearing the AFOs indicated that the rapid...

Ngày tải lên: 19/06/2014, 08:20

... cores [2]. 5. Rapid Prototyping of a Signal Processing Algorithm from the 3GPP LTE Standard The framework functionalities detailed in the previous sections are now applied to the rapid prototyping ... [2–4]inordertogeneratea more complete rapid prototyping framework. This complete framework is composed of three complementary tools based on Eclipse [5] that provide a full environment for the rapid prototyping of ... processor cores [2]. These rapid prototyping tasks can be combined and parameterized in a workflow. In PREESM, a workflow is defined as an oriented graph representing the list of rapid prototyping tasks...

Ngày tải lên: 21/06/2014, 20:20

... Section 3 reports the demon- strator built for this experiment using a novel technology called rapid prototyping (RP) that allows fast construction of low-cost mechanical structures. Section 4 presents ... embed multiple complex topologies such as completed connected mesh or hypercube. Moreover, the use of rapid prototyping technology has allowed optomechanical structures to be realized quickly and at low ... interconnected topologies for parallel computer application and experimental implementa- tion using rapid prototyping techniques,” Optical Engineering, vol. 45, no. 8, Article ID 085402, 6 pages, 2006. [5]...

Ngày tải lên: 22/06/2014, 22:20

... efficient representation model. They enable automatic rapid prototyping and lead to optimized scheduling [4]. This paper deals with a rapid prototyping method- ology based on the SynDEx tool, which ... ’94),pp. 44–53, Ischia, Italy, May 1994. [9] T. Grandpierre, C. Lavarenne, and Y. Sorel, “Optimized rapid prototyping for real-time embedded heterogeneous multipro- cessors,” in Proceedings of 7th International ... Upper Saddle River, NJ, USA, 2002. [7] N. Ventroux, J. F. Nezan, M. Raulet, and O. D ´ eforges, Rapid prototyping for an optimized MPEG-4 decoder implemen- tation over a parallel heterogenous architecture,”...

Ngày tải lên: 22/06/2014, 23:20

... these compression standards has increased the need to develop a rapid prototyping method for hardware- based DCT approximations. Rapid prototyping design meth- ods reduce the time necessary to demonstrate ... CSD coding [14]. All of the DCT implementations presented in this paper use subexpression sharing. Rapid Prototyping of FPGA-Based DCT Approximations 553 Table 1: Coding gain, MSE, hardware cost, and ... Image Processing, vol. 1605 of SPIE Proceedings, pp. 95–106, Boston, Mass, USA, November 1991. Rapid Prototyping of FPGA-Based DCT Approximations 549 Initialize the algorithmic parameters: λ 1 weight ,...

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... RapidDesignandPrototypingof DSPSystems T.Egolf,M.Pettigrew, J.Debardelaben,R.Hezar, S.Famorzadeh,A.Kavipurapu, M.Khan,Lan-RongDung, K.Balemarthy,N.Desai, Yong-kyuJung,and V.Madisetti GeorgiaInstituteofTechnology 78.1Introduction 78.2SurveyofPreviousResearch 78.3InfrastructureCriteriafortheDesignFlow 78.4TheExecutableRequirement AnExecutableRequirementsExample:MPEG-1Decoder 78.5TheExecutableSpecication AnExecutableSpecicationExample:MPEG-1Decoder 78.6DataandControlFlowModeling DataandControlFlowExample 78.7ArchitecturalDesign CostModels ã ArchitecturalDesignModel 78.8PerformanceModelingandArchitectureVerication APerformanceModelingExample:SCINetworks ã Determin- isticPerformanceAnalysisforSCI ã DSPDesignCase:Single SensorMultipleProcessor(SSMP) 78.9FullyFunctionalandInterfaceModelingand HardwareVirtualPrototypes DesignExample:I/OProcessorforHandlingMPEG DataStream 78.10SupportforLegacySystems 78.11Conclusions Acknowledgments References TheRapidPrototypingofApplication-SpecicSignalProcessors(RASSP)[1,2,3]pro- gramoftheU.S.DepartmentofDefense(ARPAandTri-Services)targetsa4Xim- provementinthedesign ,prototyping, manufacturing,andsupportprocesses(relative tocurrentpractice).Basedonacurrentpracticestudy(1993)[4],theprototypingtime fromsystemrequirementsdenitiontoproductionanddeployment,ofmultiboardsig- nalprocessors,isbetween37and73months.Outofthistime,25to49monthsare devotedtodetailedhardware/software(HW/SW)designandintegration(with10to24 monthsdevotedtothelattertaskofintegration).Withtheutilizationofapromising top-downhardware-lesscodesignmethodologybasedonVHDLmodelsofHW/SW componentsatmultipleabstractions,reductionindesigntimehasbeenshownespe- ciallyintheareaofhardware/softwareintegration[5].Theauthorsdescribeatop-down designapproachinVHDLstartingwiththecaptureofsystemrequirementsinanexe- cutableformandthroughsuccessivestagesofdesignrenement,endingwithadetailed c 1999byCRCPressLLC ... 934.3 MBytes/sec which satisfies Eq. (78.15). Using 5 i860s, the c  1999 by CRC Press LLC RapidDesignandPrototypingof DSPSystems T.Egolf,M.Pettigrew, J.Debardelaben,R.Hezar, S.Famorzadeh,A.Kavipurapu, M.Khan,Lan-RongDung, K.Balemarthy,N.Desai, Yong-kyuJung,and V.Madisetti GeorgiaInstituteofTechnology 78.1Introduction 78.2SurveyofPreviousResearch 78.3InfrastructureCriteriafortheDesignFlow 78.4TheExecutableRequirement AnExecutableRequirementsExample:MPEG-1Decoder 78.5TheExecutableSpecication AnExecutableSpecicationExample:MPEG-1Decoder 78.6DataandControlFlowModeling DataandControlFlowExample 78.7ArchitecturalDesign CostModels ã ArchitecturalDesignModel 78.8PerformanceModelingandArchitectureVerication APerformanceModelingExample:SCINetworks ã Determin- isticPerformanceAnalysisforSCI ã DSPDesignCase:Single SensorMultipleProcessor(SSMP) 78.9FullyFunctionalandInterfaceModelingand HardwareVirtualPrototypes DesignExample:I/OProcessorforHandlingMPEG DataStream 78.10SupportforLegacySystems 78.11Conclusions Acknowledgments References TheRapidPrototypingofApplication-SpecicSignalProcessors(RASSP)[1,2,3]pro- gramoftheU.S.DepartmentofDefense(ARPAandTri-Services)targetsa4Xim- provementinthedesign ,prototyping, manufacturing,andsupportprocesses(relative tocurrentpractice).Basedonacurrentpracticestudy(1993)[4],theprototypingtime fromsystemrequirementsdenitiontoproductionanddeployment,ofmultiboardsig- nalprocessors,isbetween37and73months.Outofthistime,25to49monthsare devotedtodetailedhardware/software(HW/SW)designandintegration(with10to24 monthsdevotedtothelattertaskofintegration).Withtheutilizationofapromising top-downhardware-lesscodesignmethodologybasedonVHDLmodelsofHW/SW componentsatmultipleabstractions,reductionindesigntimehasbeenshownespe- ciallyintheareaofhardware/softwareintegration[5].Theauthorsdescribeatop-down designapproachinVHDLstartingwiththecaptureofsystemrequirementsinanexe- cutableformandthroughsuccessivestagesofdesignrenement,endingwithadetailed c 1999byCRCPressLLC ... 700 lines of Ada code prior to actual hardware prototyping. An important requirement for fully functional models to support reuse across designs and rapid systems development is the ability to operate...

Ngày tải lên: 25/12/2013, 06:16