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RJG压力传感器.ppt
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1、eDART Workshop with Graph InterpretationRev.4.01RJG Insight SystemeDARTMachine sensorsMold sensors2BenefitsPart Containment Quality assurance in the processCavity Pressure Control Consistency in the ProcessReal Time Data-Instantaneous viewing of the processHistorical Data-Ability to review processCa
2、n you tell which are the good parts?With RJG Insight System,you can.3Monitoring PointsCavity PressureInjection PressureStroke Position/VelocityTemperature4Insight System Layout5eDART ComponentsEssentially a ComputerData Storage/MemoryKeyboard/Mouse portsVideo outputEthernet/ModemInsight Software6eDA
3、RT ConnectionsPower:24VDC Power Adapter (G)Lynx Ports:Sensors and Machine Interface Modules(B)Serial(COM)Port:Remote Access,Touch Screens (A)Video Connection(C)Ethernet(NIC):Network(F)Mouse and Keyboard PS2 Ports(D&E)7Interfacing the eDART with Your Machine8Interface Modules 35mm DIN rail mountable
4、modulesModuleFunctionID7-D-SEQSeven sequence digital input module(universal voltages).Gets machine state.IA1-D-VI0-10V or 4-20mA isolated analog input module for signals from machine.OA1-D-V0-10V isolated analog output,feeds signals to machine controller for transfer.OR2-DDual relay output,Contact r
5、ating 2A at 24V for control,valve gate application,sorting,or lights.9Sequence ModuleID7-D-SEQMachine signals connect to terminal 1 through 7,Common to 8Signals must be 24VDC10Sequence ModuleID7-D-SEQ(24VDC)Terminal-ImportanceComes OnGoes OffPurpose1.INJ Forward Injection StartsEnd of holdSearch for
6、 peaks,hold pressure.(Required for control)2.1st Stage Inj.StartsInj.goes to holdCreates internal Inj.Forward,Pack,&in 2-Stage“Fill”3.Screw Run Screw motor StartsStopsStroke direction,Zero,Material variation information(Required for control)4.Mold Clamped Mold clamped to pressureMold cracksAccurate
7、cycle time,integration limit,Reset Piezo Adapter&UMPI5.Mold Opening Mold openingMold fully openPinched part detection,Resets Piezo Adapter&UMPI6.ManualMachine in manualIn Full/Semi Automatic modePrevents parts counts and data storage while in this mode7.Shuttle Position Start of cyclePosition 2Start
8、 of cyclePosition 1Detects mold position in 2-position shuttle molding8.Input CommonMold Closing Mold begins to closeMold clamps upCycle time with mold opening(Resets Piezo Adapter and UMPI)Mold Open Mold fully openMold begins to closeCycle time and integration limit(Resets Piezo Adapter and UMPI)Se
9、cond Stage Start of holdEnd of holdCreates internal injection forward and packFill Inj.Moves forward after decompress pointInj.speed changes from fast fill(V1)to slow pack(V2).Measuring of material viscosity(Rare machine signal)11Analog InputIA1-D-VI(0-10v)ConnectionFunctionWire ColorTerminal 1N/A-T
10、erminal 2N/A-Terminal 3Jumper 1-Terminal 4Jumper 1-Terminal 5Jumper 2-Terminal 6Jumper 2-Terminal 70VBlackTerminal 80-10VRedJ1,J2 Communications-Accepts 0-10V/4-20mA signal from machine,thermocouples,etc.12Wiring Dual Relay Output Module OR2-D(Relay Module with Dry Contacts)Cavity Psi TransferWire c
11、ontacts as normally“Open”or “Closed”Good ControlNote:Serial number and side of module that is wired to transfer the press13Machine Sensors and Equipment14Rotary EncoderLE-R-XXMonitors Stroke/Position,Volume/VelocityAvailable in 30,50,and 100 in.15Rotary Encoder16Volume vs.StrokeThe eDART uses the st
12、roke distance and the screw diameter to calculate a volume measurement.Volume allows the mold data to be machine independent The Screw Diameter must be input into the eDART17Lynx Hydraulic Sensor LS-H-1/4NPT-XXXX”Quick Connect Fitting3,000,5,000 or 10,000 psi Full Scale18Hydraulic PressureThe eDART
13、uses the intensification Ratio(Ri)of the machine and a direct hydraulic measurement to display the Injection Pressure in actual plastic pressure at the nozzle.This allows the mold data to be machine independent.The intensification ratio must be input in the eDART.19Junction BoxJ-LX5-CE,J-LX9-CEAllow
14、s Lynx devices to be interfaced with eDART 20Data Needed for Job EntryMold/Plant/Cell/Machine?Screw DiameterIntensification Ratio(Ri)for Hydraulic MachinesLocation of Mold Pressure SensorsPin size for Indirect sensorsLocation and purpose of all output modulesFull scale Injection PSI for electric Mac
15、hines21Lab 1 ObjectivesGo to the pressIdentify all sensors and modules on machineIdentify the purpose of each module Hook up all sensors to systemGet data for job entryIntensification RatioScrew DiameterPin sizesSensor LocationsModule Locations22Mold Pressure Sensors23Cavity Sensor TypesSensor Appli
16、cationsEjector PinStrain gauge(LS-B)Analog(T-4xx,92xx)Piezoelectric(LP-B)Piezo Flush MountLynx(LP-F)Analog(61xx)Types of SensorStrain GaugePiezoelectric24Behind the Ejector Pin SensorsButton Style(Strain Gauge and Piezoelectric)Installed behind an ejector pinPin transfers force to sensorSensor trans
17、fers pressure readings to eDART 25Common Installation26Choosing the Correct ModelKey elements expected pressure vs.pin areaPin size references the surface that contacts plastic partHow to select a sensor:1.Estimated pressure in cavity 10,000 psi:i.e.10,000 psi on a 6.0mm pin generates 438#s of force
18、.Use a 2000#sensor.2.Use more than 10%of the usable range for an individual sensor:i.e.Expected plastic psi should generate more than 50#for a 500#sensor.Note:RJG also has a selection of flush mount sensors for applicationswhere an under-the-pin sensor is not practical.Refer to chart on next page272
19、8Installation IssuesUpside downShallow pocket(Pre-Load)Narrow pocket Uneven pocket bottomRounded corners in pocketPinched cablesCorrect Button Sensor InstallationIncorrect Button Sensor Installation29Indirect Mold PressureSensors that sit behind a pin read pressure indirectly.To get the correct cavi
20、ty pressure the force exerted on the pin is divided by the area of the pinThe pin size must be input in the eDARTPressure=Force/Area30Flush Mount SensorsLynx and Analog Piezoelectric31Flush Mount SensorDirect Mold PressureSensor becomes part of cavityPlastic applies pressure to sensorThe sensor tran
21、sfers the pressure readings to eDARTAll RJG flush Direct sensors 30K PSI Maximum Rating32Choosing the Correct ModelFlush Mount Sensor Installation ConsiderationHow large a witness mark allowedGood to 30,000 psi in cavitySensorSensor DiameterLengthLP-F-25-30K2.5mm(0.0984”).2m,.4m,.6m,.8mLP-F-40-30K4.
22、0mm(0.1574”).2m,.4m,.6m,.8m6157,61592.5 mm/4.0 mm(cables sold separately)33Installation IssuesFlush Mount Sensor InstallationDont over-tighten nutEnsure bores are centeredAvoid pinching cablesKeep connectors clean34Sensor Placement StrategyRunnerless system 1a.jpgRun short shots to determine placeme
23、nt of sensors35Process Control“Reduce normal variation”Mold Pressure SensorsWhats the use?2 Primary StrategiesProcess Monitoring“Detect abnormal variation”36Area of InfluenceIncorrectCorrectControl sensors should be located in the“Area of Influence”.Correct37Conventional Runner Multi-Cavity MoldCont
24、rol:Locate NEAR gate in first cavity to fillMonitor:Locate END of Fill in last cavity to fillAssumption:This works if the first(highest psi)and last cavity(lower psi)to fill are good parts.38Hot Runner/Hot Drop Multi-Cavity MoldControl:Choose a location near the gate in the cavity that best correlat
25、es to the average pressure of all cavitiesMonitor:Choose a location at the end of fill in every cavity due to“Multi-Process Disease”39Sensor Selection PracticeWhat model of sensors should be used for this part?3/8”Pin3/16”Pin40Starting Up the eDART 41Setting up eDART Attach Mold Sensors and Machine
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- RJG 压力传感器
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