Method of making expansion tanks for cooling systems and/or engines
A manufacturing process for making different expansion tanks for different cooling systems and/or for different engines, each of the expansion tanks having an inlet mouth and comprising: a plastic shell comprising a) a wall defining a cavity for containing a coolant liquid; and b) at least one collar at the inlet mouth, the collar being outwardly projecting from the wall. Each of the expansion tanks further comprising a tubular insert engaging the collar and defining the inlet mouth; the tubular insert being made of plastic material; and retention means which hold the tubular insert relative to the collar. The process comprising making shells identical in shape and size, for all of the expansion tanks; and making inserts that differ in the value of their inner diameter; each inner diameter value being determined at the design stage depending on the type of cooling system and/or the type of engine.
1. A manufacturing process for making different expansion tanks for different cooling systems and/or for different engines, each of said expansion tanks having an inlet mouth and comprising:
a plastic shell comprising:
a) a wall defining a cavity for containing a coolant liquid;
b) at least one collar at said inlet mouth, said collar being outwardly projecting from said wall;
a tubular insert engaging said collar and defining said inlet mouth; said tubular insert being made of plastic material;
the process comprising:
making shells identical in shape and size, for all of said expansion tanks; and
making tubular inserts that differ in the value of their inner diameter; each inner diameter value being determined at the design stage depending on the type of cooling system and/or the type of engine;
selecting for each of the shells the most suitable tubular insert among the made tubular inserts; and
fitting the selected suitable tubular inserts in the collars of the corresponding shells, whereby the inserts are fixedly coupled to the corresponding collars.
2. The process according to claim 1 , wherein each tubular insert is colored in mass and wherein each inner diameter value of said inserts is associated in a one to one manner with a corresponding color.
3. The process according to claim 1 , wherein each collar has an inner surface defining a seat, wherein each tubular insert comprises a tubular portion which engages a corresponding seat of a corresponding collar when a tubular insert is fitted in a corresponding collar.