Secretion of saliva from the mouth

It is generally accepted that drooling occurs because of a defect in the oral or voluntary phase of swallowing, resulting in an overflow of secretions which builds up in the front of the mouth (Shott et al. 1989).

Drooling (also known as ptyalism) is when saliva flows outside the mouth. Drooling is generally caused by excess production of saliva, inability to retain saliva within the mouth, or problems with swallowing.

The extrudation or leakage of molten resin from a plasticator nozzle or nozzle sprue bushing area while filling or shooting the mold.