Eccentricity and roundness deviation → Movement of the core pin

Warping and deformation → Different cooling and shrinkage

Short shots → High flow resistance in thin curved channels

Scratches or drag marks → Poor demolding force distribution

Weak weld line → Flow crossing from multiple gates at bends

Defects can be avoided by understanding them. This will ultimately enhance the design and service life of the curved tip syringe and other curved plastic components used in medical device applications.