Formowanie Wtryskowe Biblioteka Wad
Kompendium techniczne dla 13 typowych wad formowania wtryskowego — przyczyny, działania korygujące, parametry procesu i wytyczne materiałowe.
13
Typy wad
225+
Udokumentowane przyczyny
208+
Działania korygujące
5M1P
Metoda diagnostyczna
Zadzior
Flash is excess material that escapes the mold cavity through gaps at parting lines, vents, or slides.…
Wypaczenie
Warpage is dimensional distortion caused by uneven shrinkage from differential cooling or residual stress…
Zapadnięcia
Sink marks occur when surface solidifies before the core, which then shrinks inward.…
Niedolanie
Short shot is failure to completely fill the mold cavity during injection.…
Przypalenia
Two types: Diesel Effect trapped air compresses and self-ignites at 300-400 deg C. Gate shear material de…
Linie łączenia
Weld lines form where two advancing melt fronts meet. If the fronts are too cool or have trapped air the …
Smugi Srebrne
Silver streaks are caused by steam moisture air or degraded material stretched along the flow path.…
Pęknięcia / Kruchość
Cracks occur from excessive internal stress improper drying wrong material or ESC from chemical contact.…
Odchyłki Wymiarowe
Dimensional instability comes from inconsistent shrinkage process instability or tool wear. Plastics use …
Pustki / Bąble
Two types surface bubbles from moisture vs internal vacuum voids same mechanism as sink marks core shrink…
Nić z Dyszy
Stringing occurs when residual melt in the nozzle tip is too fluid and elongates as the mold opens.…
Ślady wypychacza
Ejector marks occur when the part is too hot or soft during ejection causing pins to sink in or create lo…
Długi Czas Cyklu
Cycle time is the total time for one complete injection molding cycle. Extended cycle time reduces produc…