Joslyn Blog

How Does Thermoforming Work?

Before you know how thermoforming works, it’s important to understand what thermoforming is.

Thermoforming is the process of heating and molding plastic sheet using air pressure and vacuum. In order to achieve the final product, thermoforming uses several different types of molds and processes.

As one of the most experienced formed plastic manufacturers in Ohio, Joslyn Manufacturing produces thermoformed plastic components for original equipment manufacturers (OEMs), point-of-purchase (POP) display companies and more. From design to logistics, we will work with you to ensure consistent, high-quality plastic products that meet your specifications.

Additionally, we’ll respond quickly to your queries and requests, and take every step to save you time, meet your deadlines and eliminate supply chain bottlenecks.

We combine industry expertise, innovative problem-solving and customer collaboration in our 3-stage plastic thermoforming process:

  1. Envision: We have the expertise to bring your brand-new thermoformed product design to life within your cost and time constraints.
  2. Create: We build your products by vacuum forming or pressure forming plastic sheet materials. Our in-house thermoform tooling ensures the outcomes are to spec, and our trimming and secondary operations finalize your products so they are ready to ship.
  3. Achieve: We set up your supply chain operations by ensuring quality, inventory management and timely shipping.

Whether you need to produce a traditional item or something cutting-edge, we have developed reliable, standardized procedures to ensure top-quality plastic products – and our established methods are proven.

To thermoform a plastic product:

  1. A sheet of plastic material is clamped into a thermoformer and sent into an oven for heating.
  2. Once it reaches the right temperature for processing, it’s transferred to a mold, where either vacuum or air is used to form a part.
  3. The formed part is then cooled, removed from the mold and sent to the next station for trimming.

Our team works with many types of plastic to find the best material for your project. Which thermoforming material is right for your application?

There are many factors to consider when selecting materials for thermoformed products, such as impact strength – as it relates to use and environment – thermal conductivity and chemical composition. Each material has physical characteristics that make it suitable for specific thermoforming applications.

Now that you know what thermoforming is and how it works, contact us or submit a quote today. Our customers trust us with their thermoforming needs due to our reliable, proven processes as well as our versatility and innovation.

Vacuum Form Female Vacuum Form Male


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