ADJUSTABLE PINS FOR RUNNER FLOW
■ Overview ● Runner flow rate adjustment pin
Example
In the case of a multi–cavity mold, or a dual cavity mold, a difference in the filling time of each cavity tends to occur depending upon the runner balance. Normally, if a difference in the filling time occurs, the filling times can be equalized by adjusting the runner diameter. To adjust the runner diameter, it is necessary to either additionally form the runner to make it thicker, or to divide the cavity insert, which takes time and labor. The runner flow rate adjustment pin is a product that facilitates adjustment of the runner flow rate when it is incorporated in the mold. It is recommended that you use it with a multi–cavity mold or a dual cavity mold. ● Features • When incorporated in the mold, the pin enables the flow rate to be adjusted from the parting face. You can use it to adjust the flow rate during a molding try. • When using this pin with a multi–cavity mold, it is possible not only to adjust the flow rate but also to stop and restart the flow of resin to a specific cavity. • When using this pin with a dual cavity mold, use it as both a flow rate adjustment pin and a runner change pin.
[Fig.1] Flow quantity adjusting method
Flow of resin
Flow of resin
2mm thick hexagonal wrench
M5 Left-hand screw
■ Installation size
Rotate the runner flow rate adjustment pin to reduce the width of the resin flow.
After adjusting the flow rate of the runner, turn the hex wrench clockwise until the pin is fixed by the stopper.
[Fig.2] Dual cavity mold (Y–shaped)
φ 3 ± 0.1
If there is a runner, for example, at the mounting position, and the wrench hole of the stopper interferes with it, change the mounting position of the stopper.
Turn the runner flow rate ad- justment pin to adjust the flow rate, and mold the two kinds of products.
Stop the flow to one cavity, and mold only one kind of product.
K 1
K 2
D K K 1
K 2
[Fig.3] Multi–cavity mold
8
13 15 18 21
16 17
7 8
Install a runner flow rate adjustment pin near the gate of each cavity, adjust the flow rate, or stop the flow to a specific cavity.
10 13 16
19 10 (9.5)
20
11
Rotate
Stop
E If there is a problem with strength or the withdrawal of the runner when the flow is stopped, form one side as shown in the figure above and remove it.
731
732
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