Thin-wall injection molding technology is also called thin-wall plastic injection molding technology. There are three types of definitions:

The ratio of flow length to thickness L/T, that is, the injection ratio of the flow length L from the melt into the mold to the farthest cavity of the cavity that the melt must be filled with the corresponding average wall thickness T is 100 or 150 is thin-wall injection ;

Injection molding method where the thickness of the molded plastic part is less than 1 mm, and the projected area of the plastic part is above 50 c㎡;

The wall thickness of the molded plastic part is less than 1 mm (or 1.5 mm), or t/d (plastic part thickness t, plastic part diameter d, for disc-shaped plastic parts) injection molding below 0.05 is defined as thin-wall injection molding .

It can be seen from this that the critical value defined for thin-wall injection molding will also change, and it should be a relative concept.