The invention relates to a mould (1) for back-injection of a plastic film (4) with molten plastic, and a corresponding process for producing a plastic moulded article in the cavity (11) formed by a first and second mould part (2, 3). The first mould part (2) has a decorating surface zone (21), a clamping surface zone (22) arranged outside of the latter, and a recessed zone (23) arranged at least outside of the decorating surface zone (21). The second mould part (3) has an inlet (31) for the molten plastic and a projecting zone (33). The projecting zone (33) is arranged so that, when the tool is closed, it engages with the recessed zone (23), in order to hold the plastic film (4) arranged between the first mould part (2) and the second mould part (3), lying on the clamping surface zone (22) of the first mould part, in the recessed zone (23) under tension.