How to eliminate cold separation in die casting parts?
Defects in die castings:
cold separation
Other name: cold junction (butt joint)、 Cold flow
?
Features:
The lower temperature of the metal flow to each other, but not fusion, and the gap appears irregular linear, there are two kinds of penetrating and non penetrating, under the influence of external force, there is a trend of development.
Causes:
elimination measures
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1 年The mold may not have been heated enough or the casting temperature may not have been at the required value or There may be gas trapped inside of the mold.Runner and fluid should be analyzed in simulation programs.
Stalwart Advocate of Campbellology and the “10 Rules of Castings by Professor John Campbell”
1 年Perform a fill simulation before one even thinks about shrinkage simulation. Stop turbulence (virtually impossible with HPDC) Annalise the confluence areas and ensure adequate venting. Just a thought.