| V-LINE TWO STAGE PLUNGER |
RECIPROCATING SCREW |
  |
 |
| Back-Flow Function by Screw and Screw Touch Bushing |
Back-Flow Function by Check Ring : Non-return valve |
| Pre-dosing material by positive shut-off before injection, therefore, it
assures constant shot volume. |
Check ring's close timing is at while injection (Inconsistent). Screw tips are
a source of frictional heat, material hang-ups, intermittent malfunctioning.
|
| Material density is stable because screw does NOT retract. |
Metered material density is not constant result from uncontrollable balance of
"back pressure" and "reciprocating movement".
|
| Metered volume = filling volume |
Metered volume is NOT equal to filling volume because there is always leak at
check ring.
|
