| 摘要 |
The invention relates to an apparatus (10) and method for moulding food-grade containers (100) from a strip (C) of paper material. The apparatus comprises a stationary die-holder plate (11), and a die- holder plate (12) which is movable with respect to it between an opened position and a closed position. The stationary die-holder plate comprises a respective stationary die half (14) and the movable die-holder plate comprises a respective mobile die half (15). In the closed position, the two die halves (14, 15) cooperate to define an impression corresponding to a container (100)provided with a bottom (101), a side wall (102), and a substantially flat perimeter portion (103) cantileverly extending from the side wall. A curling member (20), a permanent pleating member (19) and a cutting blade (18) are concentrically provided around the mobile die half and sequentially arranged from the inside to the outside thereof. Similarly, a counter curling member (23), a counter permanent pleating member (22) and a counter cutting blade (21) are concentrically arranged around the stationary die half. The blade and the counter cutting blade interact to cut a blank (C')from the starting strip, the dimensions of the blank being proportional to the dimensions of the container to be moulded. The permanent pleating member and the counter permanent pleating member interact to permanent pleat or wrinkle a peripheral crown (CI) of the blank at least at a portion of the side wall. The curling member and the counter curling member interact to form a curled edge extending externally from the peripheral flat portion of the container being moulded. Advantageously, the mobile die half can be at least partially inserted into the counter curling member so as to form the curled edge (104) of the container between the lying plane of the respective flat perimeter portion and the bottom of the container itself. |
