Page 64 - Plastics News Issue June 2025
P. 64
TECHNOLOGY NEWS
The Role of Injection Molding and Thermo-
forming in the Mix
Why not use more than two techniques for activ-
ities? For us to notice the effects of blow mold-
ing and rotational molding, we should compare
them with methods like injection molding and
products for playgrounds and kayaks are cre- thermoforming. Injection molding is the name
ated successfully using the process. Each part that everyone recognizes in the world of plas-
can have a smooth and regular thickness which tics. Due to advances, it is fast, highly repeatable
helps avoid wasting any material. and can produce detailed parts with tight toler-
ances. However, when you need to produce
Diving Deeper: Plastic Molding Techniques
Comparison large hollow items, rotational molding is a much
better option than injection molding.
The most interesting point is to compare plastic
molding techniques using blow molding and ro- Because wall thickness is consistent, there is
tational molding. They are both aimed at creat- no need for expensive welding after the part is
ing usable goods from plastic, even if they get made.
there very differently. Much like welding, thermoforming has some
drawbacks as well. The process is faster than
The process is quick and reliable for making
things in large quantities. The best outcomes are rotomolding, even though it cannot produce hol-
attained with thermoplastics such as PET, HDPE low things made from one piece and with even
and PP. It allows for creating tough yet light- strength.
weight containers using very little effort from A Closer Look at Blow Molding Advantages in
workers. If you make thousands of uniform piec- Manufacturing
es each day, blowing molding is the best choice
for you. Blow molding shouldn’t be ignored for its im-
pressive capabilities. In addition to creating mas-
At the same time, rotational molding allows de- sive copies, the assembly line can handle some
signers to have more options. Looking for a part changes to the product design. Designing han-
that has detailed cavities or winding curves? You dles, adjusting thread shapes and adjusting dif-
can rely on rotomolding to do it. Although it is ferent wall thicknesses into a mold saves the
not fast, injection molding and thermoforming need for extra processing after molding.
often struggle with keeping hollow and large
products resistant to stress and strong. One more benefit of blow molding in manufactur-
64 PLASTICS NEWS June 2025
