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17.3 InjectionUnitCycleParametersType ToC Previous Next

The InjectionUnitCycleParametersType represents information on the production cycle related to an injection unit. This type is used to extend the CycleParametersEventType defined in OPC 40083.

The BrowseNames of the additional objects shall be “InjectionUnitCycleParameters_<Nr>” (starting with 1)

Table 6 – Example of an event type derived from CycleParametersEventType with two moulds and two injection units

Attribute Value        
BrowseName ExampleCycleParametersEventType        
IsAbstract false        
References Node Class BrowseName DataType TypeDefinition Other
Subtype of 3:CycleParametersEventType defined in OPC 40083          
0:HasComponent Object MouldCycleParameters_1   Example1Mould CycleParametersType M
0:HasComponent Object MouldCycleParameters_2   Example2Mould CycleParametersType M
0:HasComponent Object InjectionUnitCycleParameters_1   Example1InjectionUnit CycleParametersType M
0:HasComponent Object InjectionUnitCycleParameters_2   Example2InjectionUnit CycleParametersType M

The Types Example1MouldCycleParametersType and Example2MouldCycleParametersType used in the example are subtypes of the MouldCycleParametersType defined in OPC 40083. The Types Example1InjectionUnitCycleParametersType and Example2InjectionUnitCycleParametersType are subtypes of the InjectionUnitCycleParametersType which is formally defined Table 7.

Table 7 – InjectionUnitCycleParametersType Definition

Attribute Value        
BrowseName InjectionUnitCycleParametersType        
IsAbstract True        
References Node Class BrowseName DataType TypeDefinition Other
Subtype of 0:BaseObjectType defined in OPC UA Part 5          
0:HasProperty Variable Index 0:UInt32 0:PropertyType M
0:HasComponent Variable CushionVolume 0:Double 0:AnalogItemType M
0:HasComponent Variable CushionStroke 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationVolume 0:Double 0:AnalogItemType M
0:HasComponent Variable DecompressionVolumeBeforePlastification 0:Double 0:AnalogItemType O
0:HasComponent Variable DecompressionVolumeAfterPlastification 0:Double 0:AnalogItemType O
0:HasComponent Variable HydraulicPressureMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable SpecificPressureMaximum 0:Double 0:AnalogItemType M
0:HasComponent Variable PlastificationRotationalSpeedMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationRotationalSpeedAverage 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationCircumferentialSpeedMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationCircumferentialSpeedAverage 0:Double 0:AnalogItemType O
0:HasComponent Variable InjectionSpeedMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable InjectionSpeedAverage 0:Double 0:AnalogItemType O
0:HasComponent Variable TransferVolume 0:Double 0:AnalogItemType O
0:HasComponent Variable TransferStroke 0:Double 0:AnalogItemType O
0:HasComponent Variable HoldHydraulicPressureMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable HoldHydraulicPressureAverage 0:Double 0:AnalogItemType O
0:HasComponent Variable HoldSpecificPressureMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable HoldSpecificPressureAverage 0:Double 0:AnalogItemType O
0:HasComponent Variable CavityPressureMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationHydraulicPressureMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationHydraulicPressureAverage 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationSpecificPressureMaximum 0:Double 0:AnalogItemType O
0:HasComponent Variable PlastificationSpecificPressureAverage 0:Double 0:AnalogItemType O
0:HasComponent Variable TransferHydraulicPressure 0:Double 0:AnalogItemType O
0:HasComponent Variable TransferSpecificPressure 0:Double 0:AnalogItemType O
0:HasComponent Variable TransferCavityPressure 0:Double 0:AnalogItemType O
0:HasComponent Variable BackPressure 0:Double 0:AnalogItemType O
0:HasComponent Variable InjectionTime 0:Duration 0:BaseDataVariableType M
0:HasComponent Variable DosingTime 0:Duration 0:BaseDataVariableType M
0:HasComponent Variable FlowIndex 0:Double 0:AnalogItemType O
0:HasComponent Variable InjectionStartPosition 0:Double 0:AnalogItemType O
0:HasComponent Variable VPChangeOverPosition 0:Double 0:AnalogItemType O

Table 8 contains a description of the parameters listed in Table 7.

Table 8 – Description of cycle parameters

Parameter Description
Index Index of the InjectionUnit (see 16.2)
CushionVolume Material volume remained in front of the screw after injection and holding pressure
CushionStroke Stroke position at cushion
PlastificationVolume Volume dosed by the machine for the next injection shot
DecompressionVolumeBeforePlastification Decompression before plastification is the movement of the screw in the opposite direction to injection
DecompressionVolumeAfterPlastification Decompression after plastification is the movement of the screw in the opposite direction to injection
HydraulicPressureMaximum Maximum pressure in the hydraulic cylinder
SpecificPressureMaximum Pressure in front of the screw tip
PlastificationRotationalSpeedMaximum Maximum plastification speed of the injection unit (RPM)
PlastificationRotationalSpeedAverage Average plastification speed of the injection unit (RPM)
PlastificationCircumferentialSpeedMaximum Maximum screw circumferential speed for plastification (e.g. mm/s)
PlastificationCircumferentialSpeedAverage Average screw circumferential speed for plastification (e.g. mm/s)
InjectionSpeedMaximum Maximum injection speed (e.g. mm/s)
InjectionSpeedAverage Average injection speed (e.g. mm/s)
TransferVolume Switch-over point to the holding pressure via volume
TransferStroke Switch-over point to the holding pressure via stroke
HoldHydraulicPressureMaximum Maximum holding pressure in the hydraulic cylinder
HoldHydraulicPressureAverage Average holding pressure in the hydraulic cylinder
HoldSpecificPressureMaximum Maximum holding pressure in front of the screw
HoldSpecificPressureAverage Average holding pressure in front of the screw
CavityPressureMaximum Maximum pressure during the injection process in the cavity or mould
PlastificationHydraulicPressureMaximum Maximum plastification pressure in cylinder
PlastificationHydraulicPressureAverage Average plastification pressure in cylinder
PlastificationSpecificPressureMaximum Maximum plastification pressure in front of the screw tip
PlastificationSpecificPressureAverage Average plastification pressure in front of the screw tip
TransferHydraulicPressure Hydraulic pressure in the cylinder during switch-over to the holding pressure
TransferSpecificPressure Pressure in front of the screw tip during switch-over to the holding pressure
TransferCavityPressure Cavity pressure in the mould during switch-over to the holding pressure
BackPressure Back pressure is the melt-pressure against the screw movement during dosage
InjectionTime Time required to fill the cavity or mould
DosingTime Time to melt-up the plastic granulates and feed the melt for the next injection shot to the front of the screw
FlowIndex Integral of the injection pressure over the injection time as measure for the injection work
InjectionStartPosition Start position of the injection
VPChangeOverPosition Screw position at switching between injection (V) and holding pressure (P)

The InjectionUnitCycleParametersType is abstract and the OPC server of the machine shall create a derived type with the additional objects of TemperatureZoneCycleParametersType (defined in OPC 40083) for the temperature zones of the barrel. The BrowseNames of the objects shall be “BarrelTemperatureZoneCycleParameters _<Nr>” (starting with 1 for each injection unit).

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