The short shot injection molding defects mainly occurs because the molten plastic fails to completely fill the entire mold cavity, resulting in localized voids or incomplete products.
Causes of Short Shot
Insufficient plastic supply or low melt fluidity.
Injection cylinder temperature too low.
Issues with product shape or mold.
Inadequate injection pressure.
Mold too narrow, causing high melt flow resistance.
Unreasonable design of mold venting structure.
Remedies for Short Shot
Increase injection speed and melt fluidity.
Raise the temperature of the injection cylinder to enhance plastic flow.
Increase injection pressure.
Improve the mold’s venting system.
Enlarge gate size and runners.
