Profile: TrioTech Dies And Tools Mfg LLC specialized in production of tools and dies and our service includes a wide variety of technical consulting. Progressive tooling is method widely used for the manufacturing of a wide range of parts and components. It is the method of incorporating various works like punching , coining , bending and several other methods to modify a raw material. All these operations are performed in a progressive press. Blow molding is used to design hollow plastic parts such as bottles and hollow plastic shapes. Blow molding is done by a special structure called Parison which is made up of plastic caller thermosetting plastic. The parison is a tube like plastic structure with a hole on one end that air can pass through it. In first step the plastic is melt and passed into the parison.