Thermoforming equipment maker Brown Machine LLC has received a patent for its tool design that uses an external plug-assist plate.
Thermoforming tools with the plate reduce the air consumption of third-platen thermoforming equipment more than do traditional, internal plug-assist tools.
For example, for round products, a pressure box with an internal plug-assist plate will use twice the blow-form air that would be consumed by the same pressure box with an external plug-assist plate, according to Brown tooling engineering manager Bill Wells.
For rectangular products with small corner radii, the difference is less than twice, but still significant, Wells said.
Brown is based in Beaverton, Mich.
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