| V-LINE TWO STAGE PLUNGER |
RECIPROCATING SCREW |
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| Minimum screw stroke. Very stable material feeding. |
Screw is reciprocating while metering. Feeding material at different position
of screw. |
| While plasticizing, screw position is stationary like extrusion screw. Each
pellets goes through the same thermal exposure, so that it w ill provide very
stable density and uniform melt of material. |
Reciprocating movement of screw leads to unstable thermal distribution in each
shot. It tends to be complicated to compensate this by setting mult iple screw
rotation and/or multiple back-pressure.
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| 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".
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| V-LINE handle higher recycle ratio compare to Reciprocating Screw. |
One screw has two functions: Plasticizing and injection.
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