| 摘要 |
A method (and corresponding apparatus) for simultaneously foaming two objects or two or more pairs of objects (2, 2a, 2b) each having two prevalent dimensions compared with a third dimension and being provided with two outer coating elements (3, 3i, 3e, 3i', 3e') of the shell type or of the flat, curved or thermoformed slab or sheet type in order to compose the elements into a box element, for example for forming a refrigerator door between said two outer coating elements (3, 3i, 3e, 3i', 3e') there being interposed an intermediate layer (4) made of expanded polyurethane or phenolic thermally insulating material (for example a foam) comprises the steps of: i). inserting the two coating elements (3i, 3e) of a first object (2a) inside a first containing unit (5a), and the two coating elements (3i', 3e') of a second object (2b) inside a second containing unit (5b); ii). moving the first (5a) and second (5b) containing unit against possible respective counter-template separating baffles 12 aand 12b to close, in the forming position and the required geometric shape required, the hollow box elements and in such a manner as to define a single foaming operative module (10) containing two or more objects or pairs of objects (2, 2a, 2b) to be foamed simultaneously, in which, inside said foaming operative module (10), the coating elements (3, 3i, 3e, 3i', 3e') of the first object (2a) and of the second object (2b), are arranged according to respective mutually parallel planes, and a coating element (3i) of said first object (2a) and a respective coating element (3i') of said second object (2b) are near to one another in a mutually facing position, separated possibly only by the respective separating baffles having a counter-template function; iii). hooking the foaming operative module (10) on a rotatable storage structure (6) that is provided with hooking and clamping means (11) and housing means (7) for each foaming operative module (10); iv). simultaneously dispensing distinct flows of polyurethaneor phenolic mixture each inside a respective object (2, 2a, 2b) to be foamed; v). enabling the coating element (3i) of the first object (2a) and the coating element (3i') of the second object (2b) that are placed in a mutually facing position to exert a supporting and contrasting action on one another, possibly transmitted through the counter-template separating baffles, so as to contrast and distribute the thrusts exerted by the expanding foam in said first (2a) and second (2b) objects placed mutually parallel and alongside; vi). contrasting from the exterior on said foaming operative module (10) located on said rotatable storage structure (6) the thrusts exerted by the expanding foam by a contrasting action exerted by said hooking and clamping means (11). |
