Blow molding tooling cost is 10 to 20 times the cost of rotational molding tooling due to the high pressures required to manufacture blow molded products.
It is difficult to control the wall thickness of blow molded parts due to the way in which the pressure is used to inflate the plastic charge.
There are limited product applications for blow molding such as bottles and fuel tanks.
Blow molded part geometry is limited whereas rotational molding part geometry can be complex.
Parts are weaker and more susceptible to failure in the corners.
