Dual Sheet/Twin Sheet Vacuum Forming is a variation on Vacuum Forming. It is one of the three hollow part procecesses( Injection Molding, Blowing Molding & Thermoforming). It uses uses two vacuum formers to create a hollow part. The sheets are heated seperatly and brought to the molding area. Once vacuum is applied, the mold closes and seals the sheets together.
Twin Sheet Thermoforming is a process involving Vacuum Forming two plastic sheets simultaneously by utilizing opposing female molds, and bonding the two halves together while they are still hot. The result is a hollow finished piece which looks very similar to a blow molded product, but with several cost and manufacturing advantag...