Patent ID: 6746229
Filing Date: 2004-06-08
Classification: B29C,Y10S

Abstract:
A pressure thermoforming machine, comprising:a lower bracket; a lower molding half moveably supported on the lower bracket; an upper bracket securely connected to the lower bracket; an upper molding half moveably supported by said upper bracket; and supporting means arranged between the lower molding half and the lower bracket, and including first and second driving blocks, each said driving block having at least a first and a second inclined surface, with an angle of inclination of the first surface being different from an angle of inclination of the second surface, the first and second inclined surfaces of the first driving block being disposed to face the first and second inclined surfaces of the second driving block, the first and second driving blocks being relatively movable toward and away from each other, the lower molding half being supported by the inclined surfaces of said driving blocks to prevent any unbalancing during a molding process, and so that the lower molding half moves upward when the driving blocks move toward each other, and moves downward when the driving blocks move away from each other; and wherein the lower molding half moves upward and downward more quickly when it is disposed on the first inclined surfaces than when it is disposed on the second inclined surfaces.