We have designed and machined production thermoform molds from aluminum and prototype thermoform tools from urethane tooling board as well as produced patterns and cast thermorform molds.
Thermoforming is a very diverse topic. Molds and expertise vary greatly.
Thin gauge or thick? Sheet or roll fed? Short run or long?
A shop that builds molds for 1/4" ABS suitcases might not be the best for roll fed thin gauge blister packs.
I've been involved in thermoform tooling since 1980. Heavy and thin gauge, medical, food and general packaging. I can provide tooling ,samples and production runs.