INJECTION
PROBLEMS |
SOLUTION |
INJECTION
PROBLEMS |
SOLUTION |
SURFACE MELT
FLOW LINE |
１.TOO HIGH MELTING POINT |
MOLD
STRIP
DIFFICULTY |
１.DECREASE INJECTION PRESSURE |
|
２.ADJUST INJECTION SPEED |
２.DECREASE HOLDING PRESSURE TIME |
|
３.ENLARGE INLET SIZE |
３.INCREASE COOLING TIME |
|
４.MATERIAL NOT DRY ENOUGH |
４.CHECK MOLD TEMP. |
|
５.INCREASE MOLD TEMP. |
５.MOLD SURFACE TOO SMOOTH |
|
６.CHANGE INLET POSITION |
６.USE MOLD RELEASE AGENT |
CONNECTION
LINE |
１.INCREASE INJECTION SPEED |
７.INCREASE SLOPE OF EJECTOR PIN |
|
２.ADJUST MELTING TEMP. |
８.CHECK RESIN SHIRNKAGE RATE AND
MOLD SPEC. |
３.ENLARGE INLET SIZE OR CHANGE
INLET POSITION |
NOZZLE
DRIPPING
MELTed
MATERIAL |
１.DECREASE MELTING TEMP. |
|
４.SET AIR HOLE |
２.DECREASE NOZZLE TEMP. |
５.REMOVE CONNECTION OF FRONT
COLD RESIN |
３.DECREASE BACK PRESSURE |
PRODUCT
INDENTATION |
１.DECREASE INJECTION TEMP. |
４.DELAY TIME OF STRIPPING GATE'S
COLD RESIN |
|
２.INCREASE HOLDING PRESSURE |
WARPAGE |
１.BALANCE MOLD TEMP. |
|
３.INCREASE INJECTION PRESSURE |
２.CHECK INJECTION PRESSURE |
|
４.DECREASE MELTING TEMP. |
３.DECREASE INJECTION SPEED |
５.CHECK LENGTH OF RESIN
MEASURMENT AREA |
４.CHANGE INLET POSITION |
６.DECREASE MOLD LOCKING
PRESSURE & INCREASE EXHAUST |
５.CHECK MOLD LOCKING PRESSURE |
RESIN
NOT FULL IN
THE MOLD |
１.INCREASE MATERIAL SUPPLY |
TOUGHNESS
NOT
ENOUGH |
１.MELTING TEMP. IS TOO LOW OR
TOO HIGH |
|
２.INCREASE INJECTION PRESSURE TIME |
２.MATERIAL NOT DRY ENOUGH |
|
３INCREASE MELTING TEMP. |
３.DECREASE RECYCLE MATERIAL RATIO |
|
４.ENLARGE MOLD GATE, SPRUE, INLET |
４.CHECK CONTAMINATION |
|
５.USE BIGGER INJECTION MACHINE |
５.MATERIAL REMAIN TOO LONG TIME
IN THE SCREW |
|
６.CHECK SCREW HEAD |
６.USE TOUGHNESS AGENT TO IMPROVE
PHYSICAL PROPERTY |
|
７.INCREASE MATERIAL M.F.I. |
SCREW
CANNOT
ROLL |
１.INCREASE MELTING TEMP. |
|
BURNED |
１.DECREASE INJECTION SPEED |
２.DECREASE BACK PRESSURE |
|
２.ADJUST MELTING TEMP. |
３.FILL UP PROPER GREASE |
|
３.SET AIR HOLE |
４.STOP MACHINE & CHECK IF ANY
FOREIGN STUFF |
