Custom Blow Molding

Blow Molded Bellows

Our Capabilities

  • Open Bellows
  • Closed Bellows
  • Short Bellows
  • Bellows Exceeding 15”
  • A Variety of Plastics & Colors
  • Varying Sizes and Shapes
  • Varying Thicknesses, Diameters, Lengths, and Weights

Common Applications

  • Protection of Moving Joints from Debris
  • Ducts
  • Cushioning
  • Gas Station Nozzles
  • And More

North American Plastics is capable of providing custom molded bellows in virtually any configuration needed.

Various Blow Molded Bellows
Most Popular Bellows

Custom blow molded bellows serve a wide range of functions. Our bellows take into consideration both application and environment. Our engineers will ensure proper material selection. If your bellow will be used for suction, we will consider the varying consistencies of the liquids bellows will most likely suction and manufacture accordingly. We manufacture all our products with every variable in mind.

Our engineers will ensure optimization of critical performance factors. Fully customizable performance factors include:


Compressibility is concerned with how difficult or easy it is to fully compress a bellows as well as how long it stays compressed for. This is largely a function of wall thickness, diameter, and geometry and can be customized to meet very specific needs.


Bellows are sometimes used for cushioning instead of suction. In these cases, we can control how much air is inside the bellows to provide varying levels of cushioning.


This is important for customers who need their bellows to conform and perform despite rough conditions.


Memory refers to how long bellows stays collapsed and how long it takes for them to return to their original state again. Generally, it's best for bellows to return to their original state as quickly as possible, and we engineer wall thickness, diameter, and geometry to arrive at the best result.


Stiffness dictates how difficult it is to change the shape of the bellows. A stiff bellows is harder to compress but generates a range of spring rates.


Travel refers to how much distance there is between the fully compressed and uncompressed state during use.

Contact Us to discuss your project’s specific needs.