At Sunrise Packaging, we use a combination of vacuum and pressure forming when we manufacture thermoformed plastic packaging products. Thermoforming simply refers to the application of heat to thermoplastic in order for it to take the shape of the mold, however there is much more to it than that. That is where a vacuum forming process comes into play. Mostly used for parts with shallow depth, a vacuum is used to assist the plastic material into the mold so it can be thermoformed evenly. A tool called a plug assist is also used and pressure is applied, which is where the term pressure forming comes from. If only one of these methods are used, the plastic is at risk of bunching up and creating an inferior product.
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