Without doing a special die remodeling, you can shut an ejector plate part tightly and expect the following effects by outrunning air in a cavity from an ejector pin.

(An effect example)

  • Improvement of gas burns and voids.
  • Improvement of a short mold (in particular, thin cast products).
  • Sink mark improvement and strength up of weld part.
  • Period extension of die maintenance by reduction of mold deposit.
  • Life extension of die core pin.



(Vacuum Pump Type: VP-40-500)


Power AC380V-420V 3phase
Pump motor 0.4KWH
Exhaust velocity 40L / 30 sec
Noise level 70dBA
Regular Vacuum degree 0 - 95 K Pa (-722mmhg)
Weight 115Kg

Assistant injection system:

  • Eliminates the Weld line,Flow marks, Gas marks & Etc..
  • Eliminates the parting line flashes.
  • Reduces rework time and down time.
  • Good control over contamination issues.
  • Good for thin wall products.
  • Reduces Cycle time.
  • Increases mold life and reduces mold maintenance



Vacuum Assisted System
For precision injection molding

Initially, this Vacuum Assisted System was used for molding big components within thin shells, to overcome the issues of short molding and flow mark.

Currently, it is being used by some companies in precision injection molding for controlling parting line flashes, contamination issue and increasing tool life.

Vacuum Pump Machine GAS Suction Method