To suppress a phenomena of making a thickness of a molded article to be thinned down or making embossing to be elongated by suppressing elongation by going-down of a clamping mechanism at least in a part molding a product by forming a molded surface of a laminate product upon forming non-air-permeable space part by adhering a laminated material tightly on a molding surface of a vacuum molding machine for the purpose of molding a laminate product.

When a die 2 of a vacuum molding machine molds a laminate product 1 by vacuum aspiration, a lift mechanism 4 for a laminate product is gone down together with a clamp mechanism 3 by keeping the lift mechanism 4 adhering to the laminate product 1, whereby a laminate product 1 can be molded in a desired shape by keeping the laminate product 1 adhering to an outer frame part 2a of the die 2 for vacuum molding under compression.

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