Page 63 - Plastics News Issue June 2025
P. 63
TECHNOLOGY NEWS
Blow Molding vs. Rotational Molding:
Choosing the Right Process
panded until it forms to the shape of the mold
cavity. The result? This product is light in weight
and has a reliable consistent shape.
The main appeal of blow molding for manufactur-
ing is how fast and efficient it is. Producing large
hoosing the ideal way to manufacture volumes is made easy, providing consistency not
plastic can be as difficult as assembling found in most other plastic molding processes.
Ca puzzle. There are plenty of machines In packaging, automobile making and consumer
available, chosen by their purpose, materials or goods, blow molding is a very useful approach
the volume of parts produced. Two techniques thanks to its ability to increase production.
frequently talked about in plastic molding are
blow molding and rotational molding. However, What Makes Rotational Molding Unique?
it is not always clear which approach is most im- On a different note, rotational molding or roto-
portant for superb products. We should examine molding, is sometimes used because its slow
the unique world of plastic molding processes pace allows for a wide range of applications.
to learn the reasons behind the differences and Here, powdered plastic goes into a mold and it
similarities between the two systems. is heated while it is spun on different axes.
Understanding the Basics: What Is Blow Mold- The plastic melts while the heat is on, filling the
ing?
mold from the inside and when it cools, the pro-
The principle of blow molding is that it allows cess forms a solid hollow part.
for forming hollow tubes or vessels from plas- Rotational molding works at a slower pace than
tic. Blow molded products are often found in the
form of shampoo bottles, milk jugs and automo- injection or blow molding, but it also has strong
points. Large and seamless items like tanks,
tive ducts. First, the heated plastic tube is ex-
June 2025 PLASTICS NEWS 63
