PURPOSE: To eliminate problems, such as deformation of products and flaws on the product surfaces, by providing shutters which are supported liftably via springs inserted into the space parts of a box-shaped supporting frame assembly.

CONSTITUTION: A trimming die 7 is fixed atop a table 6 bored with holes 6A which can drop the products 8. Holes 7a having the shape resembling the shape of the products 8 are bored in this die. A press plate 9 is constituted vertically movably above this die. A lifting plate 2 connected at the rear surface thereof to a cylinder 1 is, thereupon, provided below the holes 6A of the table 6. The box-shaped supporting frame assembly 3 having the space in the upper part is fixed atop this plate. The shutters 5 having the shape resembling the shape of the space parts of the box-shaped supporting frame assembly 3 are liftably provided in these space parts. The shutters 5 are supported via the coil springs 4. As a result, the smooth production of non-defective goods is possible.