Autodesk Valve Gates 2016用户手册说明书
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Node No Specifies the node for the Trigger location.
Delay time Specifies that the valve gate will be opened at the required time, in seconds, after the flow front has reached the trigger location. If you do not want a delay time to apply, enter 0.
Practice
Tub model
Design criteria: use valve gates to eliminate weld lines
Manual runner modeling Simulate
All open Instantaneous open Velocity open
Control Type Time Flow Front Pressure % Volume Ram Position
Parameter
Initial State
Trigger Location
Delay Time
© 2016 Autodesk
Control Type Description
Time Specifies the time from start of injection when the valve gate state is changed. The state can change several times during the cycle.
valve pin moves Ensure only the last element is assigned a
valve gate controller
© 2016 Autols
Create gate controllers
Trigger Initial state Velocity
Trigger location – Select this option if you want the initial opening/closing of Specified the valve gate to be triggered by an event at a specified node in the model.
Flow Front Specifies the gate to open when the flow front in the cavity reaches the gate. Additional change of state times can be entered. This is used to set up sequential gating.
© 2016 Autodesk
Modeling Valve Gates
The “valve gate” is the last element in the hot drop
Model the pin in the open position
The flow channel is
Annular when the valve pin passes through the flow channel
Valve Gates
© 2016 Autodesk
Valve Gates
Hot runner with a gate opened and closed by a pin
Used to control the filling
Sequential gating No gate vestige Packing control Balancing
Initial State – Select this option if the valve gate is initially closed and the Closed first event you will specify is the opening of the valve gate.
Inner diameter is the pin diameter
© 2016 Autodesk
Modeling the Valve Gate
Ensure all elements in the gate are hot Use a fine mesh to capture the flow as the
© 2016 Autodesk, Inc. All rights reserved.
Trigger location – Select this option if you want the initial opening/closing of Gate the valve gate to be triggered by an event at the gate node associated with the selected valve gate.
Control Type Description
Initial State – Select this option if the valve gate is initially open and the Open first event you will specify is the closing of the valve gate.
Constant Variable speed
Pin stroke Pin diameter Velocity profile
© 2016 Autodesk
Valve Gates Control Type – Parameter Matrix
Several combinations of control and parameters
© 2016 Autodesk
Autodesk is a registered trademark of Autodesk, Inc., and/or its subsidiaries and/or affiliates in the USA and/or other countries. All other brand names, product names, or trademarks belong to their respective holders. Autodesk reserves the right to alter product and services offerings, and specifications and pricing at any time without notice, and is not responsible for typographical or graphical errors that may appear in this document.
Circular when the when the pin is not in the flow path
© 2016 Autodesk
Modeling an Annular Hot Drop
Select element(s) Set cross-section as Annular Enter outer and inner diameters
Pressure Specifies the change of state based on a pressure at the gate or a specified location. Additional changes of states based on pressures can be entered.
%Volume Specifies the change of state based on a % of part volume filled. Additional changes of states based on volume can be entered.
Ram Position Specifies the change of state based on ram displacement. Additional changes of states based on ram displacements can be entered.
Delay time Specifies that the valve gate will be opened at the required time, in seconds, after the flow front has reached the trigger location. If you do not want a delay time to apply, enter 0.
Practice
Tub model
Design criteria: use valve gates to eliminate weld lines
Manual runner modeling Simulate
All open Instantaneous open Velocity open
Control Type Time Flow Front Pressure % Volume Ram Position
Parameter
Initial State
Trigger Location
Delay Time
© 2016 Autodesk
Control Type Description
Time Specifies the time from start of injection when the valve gate state is changed. The state can change several times during the cycle.
valve pin moves Ensure only the last element is assigned a
valve gate controller
© 2016 Autols
Create gate controllers
Trigger Initial state Velocity
Trigger location – Select this option if you want the initial opening/closing of Specified the valve gate to be triggered by an event at a specified node in the model.
Flow Front Specifies the gate to open when the flow front in the cavity reaches the gate. Additional change of state times can be entered. This is used to set up sequential gating.
© 2016 Autodesk
Modeling Valve Gates
The “valve gate” is the last element in the hot drop
Model the pin in the open position
The flow channel is
Annular when the valve pin passes through the flow channel
Valve Gates
© 2016 Autodesk
Valve Gates
Hot runner with a gate opened and closed by a pin
Used to control the filling
Sequential gating No gate vestige Packing control Balancing
Initial State – Select this option if the valve gate is initially closed and the Closed first event you will specify is the opening of the valve gate.
Inner diameter is the pin diameter
© 2016 Autodesk
Modeling the Valve Gate
Ensure all elements in the gate are hot Use a fine mesh to capture the flow as the
© 2016 Autodesk, Inc. All rights reserved.
Trigger location – Select this option if you want the initial opening/closing of Gate the valve gate to be triggered by an event at the gate node associated with the selected valve gate.
Control Type Description
Initial State – Select this option if the valve gate is initially open and the Open first event you will specify is the closing of the valve gate.
Constant Variable speed
Pin stroke Pin diameter Velocity profile
© 2016 Autodesk
Valve Gates Control Type – Parameter Matrix
Several combinations of control and parameters
© 2016 Autodesk
Autodesk is a registered trademark of Autodesk, Inc., and/or its subsidiaries and/or affiliates in the USA and/or other countries. All other brand names, product names, or trademarks belong to their respective holders. Autodesk reserves the right to alter product and services offerings, and specifications and pricing at any time without notice, and is not responsible for typographical or graphical errors that may appear in this document.
Circular when the when the pin is not in the flow path
© 2016 Autodesk
Modeling an Annular Hot Drop
Select element(s) Set cross-section as Annular Enter outer and inner diameters
Pressure Specifies the change of state based on a pressure at the gate or a specified location. Additional changes of states based on pressures can be entered.
%Volume Specifies the change of state based on a % of part volume filled. Additional changes of states based on volume can be entered.
Ram Position Specifies the change of state based on ram displacement. Additional changes of states based on ram displacements can be entered.