Valve
gate systems, which are operated pneumatically or hydraulically, can be used with hot
runners to open and close the gate, and control the filling and packing of the
injection-molded
part.
Advantages of valve gate systems include: improved physical appearance, reduced
residual stresses, elimination of weld-lines, reduction of cycle time, balancing
flow in family molds, and facilitation of very rapid filling in thin-wall molding.
You can add control valves to define the location and the opening/closing mechanism
of valve gate systems in your mold design.
To open the Control Valve PropertyManager:
- In the PlasticsManager, right-click Boundary Conditions, and click Control Valve
.
You can use a face or reference plane to define the gate locations, or you can use
a plane defined by the intersection of selected surfaces.
Valve
| |
Manually select the control
valve locations
|
Adds a control valve on a selected face or reference
plane. |
| |
Automatically find
intersecting surfaces
|
Lets the software find intersecting surfaces to add a
control valve. Select two bodies that are in
contact. Assign these bodies to different domain types in the
solid meshing procedure.
|
Reference Type
Available when you choose
manual selection of control valve locations.
 |
Face |
Adds a control valve to the
selected face. |
 |
Plane |
Adds a control valve to the
selected reference plane. |
| Available when you
select Automatically find intersecting
surfaces. |
| |
Components
|
Select two bodies that intersect
each other. |
| |
Find
intersecting surfaces |
Adds a control valve at
intersecting surfaces that the tool detects and lists under
Results. |
Valve Open Range
Options for defining
when a control valve opens and closes.
| |
Volume Ratio (%) |
Controls the opening and closing of the control valves
based on the percentage of the cavity volume that is filled. |
| |
Exclude Runner Volume
(Shell
Analysis
Procedure Only) |
Excludes the runner volume from the computation. Available only with shell
analysis
procedure.
|
| |
Time Ratio (%) |
Controls the opening and closing of the control valves
based on the elapsed time since the start of Filling. |
| |
Automatic - Solid
Analysis
Procedure Only |
Opens the control valve
automatically when the polymer melt front passes the valve location.
The results log reports the time at which the control valve
automatically opens. After opening, control valves with the
Automatic option remain open for the rest of Filling. Available for solid
analysis
procedure.
|