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Guide to Plastic Thermoforming: Everything You Need to Know
Plastic thermoforming — what is it, why you would use it, and how to do it right. Plastic thermoforming can provide tailored, durable and versatile products for anyone — in packaging, automotive, medical or retail. So read on in this ultimate guide for everything you need to know about plastic thermoforming, including benefits, the thermoforming process, and applications.
Plastic Thermoforming: What is it?
Plastic thermoforming is a manufacturing process in which a plastic sheet is heated to a pliable forming temperature and molded to a specific shape using the use of vacuum, pressure or mechanical force. Once the plastic has molded itself to the mold, it is cooled and trimmed to form the part.
Plastic Thermoforming Types
There are two types of plastic thermoforming —
- Vacuum Thermoforming – It uses suction to pull the heated plastic sheet over a mold that creates a precise shape.
- Pressure Thermoforming — This applies additional pressure in order for the plastic sheet to better match the mold, creating finer details and higher quality parts.
The Advantages of Plastic Thermoforming
Plastic thermoforming is a popular manufacturing process for many reasons:
- Low-Cost Production: Tooling is cheaper than injection molding.
- Versatility: Can be shaped into many shapes and sizes.
- Rapid Production: Fast production cycles; perfect for prototypes and short-run production.
- Lightweight & Durable: Thermoformed plastics are lightweight yet strong.
- Customization: Enables complex designs, branding, and functional improvements.
The Process of Plastic Thermoforming
Plastic thermoforming process consists of several steps, which are discussed as follows:
- Selection of Material – Material selection is essential and differs based on an application (e.g. ABS, PETG, PVC, HDPE).
- Sheet Heating – This may refer to the process of heating the plastic sheet to a temperature necessary for forming.
- Forming Process – The heated sheet is shaped via vacuum or pressure.
- Cooling & Trimming – The plastic shape cools and excess plastic is trimmed off.
Typical Versatile Applications of Plastic Thermoforming
Plastic thermoforming is an industry-cohesive process that is utilized in multiple industries for its versatility and functionality. Here are some of its most common applications:
- Packaging
- Blister packs
- Clamshell packaging
- Custom trays for product protection
- Automotive
- Dashboard panels
- Door liners
- Bumper components
- Medical & Healthcare
- Medical trays
- Device housings
- Sterile packaging
- Retail & Displays
- Point-of-purchase displays
- Signage
- Store Fixtures
- Industrial & Manufacturing
- Equipment covers
- Custom enclosures
- Protective cases
Plastic Thermoforming
Plastic thermoforming is a dynamic and efficient manufacturing process that serves a variety of industries. Thermoforming is an affordable and flexible packaging solution whether you require custom packaging, automotive parts, medical components, or retail displays. Picking the right plastic thermoforming business means getting high-quality products that meet your requirements and specifications.
Need A Plastic Thermoforming Quote?
If you’re in the market for a plastic thermoforming partner, reach out to us today and tell us about your project needs!
Examples of our Thermoforming projects

(Custom serving trays thermoformed in one piece using a mold)


(Thermoformed globes used as hanging lampshades. These 30+ lampshades were installed at a property in NYC)

David heat forming a large clear acrylic dome using forced air after heating of the acrylic.


Angel, David and David Jr prepping and welding a dome, and the finished product ordered by a client in Chicago.
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Where innovation meets durability – We at Welch Plastics continuously offer high-quality, precision plastic fabrication to transform your ideas into reality. Reach out to see what we can create for you.

Since 2000
Welch Plastics
Where innovation meets durability – We at Welch Plastics continuously offer high-quality, precision plastic fabrication to transform your ideas into reality.