"Following are some of the common defects in Injection Molding(https://www.scientificmoldingsolutions.com/scientific-molding-resources). The solutions mentioned are possible solutions and must be tried out with safety in mind. Please always follow the material manufacturer and machine manufacturer's guidelines for safety.Paragraph.Short ShotMolten Plastic is not reaching the mold cavity sectionIncrease melt temperatureIncrease mold temperatureIncrease injection speedIncrease injection pressure if process is pressure limitedCheck if the mold is vented in the area of short shotsIncrease gate and runner sizesFlash Molten Plastic is flowing into unwanted sections of the mold cavityCheck for Mold shut-off and mold damageDecrease melt temperatureDecrease mold temperatureDecrease injection speedSinkPlastic is shrinking as it cools but additional plastic cannot be for further compensation of the shrinkageIncrease pack and hold pressuresIncrease pack and hold timesDecrease mold temperaturesDecrease melt temperatures"