Material Leakage from Nozzle (HSJ-280), Machine Trouble Shooting

Kenplas Forum ==> Machine Trouble Shooting ==> Material Leakage from Nozzle (HSJ-280)

To regulate "back pressure" setting on "back pressure valve",
Remove this black plastic cap, regulate the bolt inside. Clockwise to increase back pressure, counter‐clockwise to reduce back pressure.

2007-12-11 12:32:41 By Kenplas

On old machine (before 2004), spring nozzle was used, then no material comes out while charge even nozzle did not touch mold sprue.
But in all new machines, direct nozzle used to prevent pressure loss. This problem may happen. Simply move nozzle forward to touch mold sprue.
For PET preform molding, simply set "BACK PRESSURE" to "0" by regulating "back pressure valve" (squared in RED), and set "SPRUE BACK" to "0" on LCD.

2007-12-11 12:22:48 By Kenplas

We have a problem with the injection machine HSJ-280, the screw is ejaculating the raw material without stopping.

Best regards,

Hamou

2007-12-11 12:18:58 By Hamou


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